4127 lines
134 KiB
C
4127 lines
134 KiB
C
/*
|
|
* various utility functions for use within FFmpeg
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/* #define DEBUG */
|
|
|
|
#include "avformat.h"
|
|
#include "avio_internal.h"
|
|
#include "internal.h"
|
|
#include "libavcodec/internal.h"
|
|
#include "libavcodec/raw.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/dict.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "metadata.h"
|
|
#include "id3v2.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/mathematics.h"
|
|
#include "riff.h"
|
|
#include "audiointerleave.h"
|
|
#include "url.h"
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
#include <strings.h>
|
|
#include <stdarg.h>
|
|
#if CONFIG_NETWORK
|
|
#include "network.h"
|
|
#endif
|
|
|
|
#undef NDEBUG
|
|
#include <assert.h>
|
|
|
|
/**
|
|
* @file
|
|
* various utility functions for use within FFmpeg
|
|
*/
|
|
|
|
unsigned avformat_version(void)
|
|
{
|
|
return LIBAVFORMAT_VERSION_INT;
|
|
}
|
|
|
|
const char *avformat_configuration(void)
|
|
{
|
|
return FFMPEG_CONFIGURATION;
|
|
}
|
|
|
|
const char *avformat_license(void)
|
|
{
|
|
#define LICENSE_PREFIX "libavformat license: "
|
|
return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
|
|
}
|
|
|
|
/* fraction handling */
|
|
|
|
/**
|
|
* f = val + (num / den) + 0.5.
|
|
*
|
|
* 'num' is normalized so that it is such as 0 <= num < den.
|
|
*
|
|
* @param f fractional number
|
|
* @param val integer value
|
|
* @param num must be >= 0
|
|
* @param den must be >= 1
|
|
*/
|
|
static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
|
|
{
|
|
num += (den >> 1);
|
|
if (num >= den) {
|
|
val += num / den;
|
|
num = num % den;
|
|
}
|
|
f->val = val;
|
|
f->num = num;
|
|
f->den = den;
|
|
}
|
|
|
|
/**
|
|
* Fractional addition to f: f = f + (incr / f->den).
|
|
*
|
|
* @param f fractional number
|
|
* @param incr increment, can be positive or negative
|
|
*/
|
|
static void frac_add(AVFrac *f, int64_t incr)
|
|
{
|
|
int64_t num, den;
|
|
|
|
num = f->num + incr;
|
|
den = f->den;
|
|
if (num < 0) {
|
|
f->val += num / den;
|
|
num = num % den;
|
|
if (num < 0) {
|
|
num += den;
|
|
f->val--;
|
|
}
|
|
} else if (num >= den) {
|
|
f->val += num / den;
|
|
num = num % den;
|
|
}
|
|
f->num = num;
|
|
}
|
|
|
|
/** head of registered input format linked list */
|
|
static AVInputFormat *first_iformat = NULL;
|
|
/** head of registered output format linked list */
|
|
static AVOutputFormat *first_oformat = NULL;
|
|
|
|
AVInputFormat *av_iformat_next(AVInputFormat *f)
|
|
{
|
|
if(f) return f->next;
|
|
else return first_iformat;
|
|
}
|
|
|
|
AVOutputFormat *av_oformat_next(AVOutputFormat *f)
|
|
{
|
|
if(f) return f->next;
|
|
else return first_oformat;
|
|
}
|
|
|
|
void av_register_input_format(AVInputFormat *format)
|
|
{
|
|
AVInputFormat **p;
|
|
p = &first_iformat;
|
|
while (*p != NULL) p = &(*p)->next;
|
|
*p = format;
|
|
format->next = NULL;
|
|
}
|
|
|
|
void av_register_output_format(AVOutputFormat *format)
|
|
{
|
|
AVOutputFormat **p;
|
|
p = &first_oformat;
|
|
while (*p != NULL) p = &(*p)->next;
|
|
*p = format;
|
|
format->next = NULL;
|
|
}
|
|
|
|
int av_match_ext(const char *filename, const char *extensions)
|
|
{
|
|
const char *ext, *p;
|
|
char ext1[32], *q;
|
|
|
|
if(!filename)
|
|
return 0;
|
|
|
|
ext = strrchr(filename, '.');
|
|
if (ext) {
|
|
ext++;
|
|
p = extensions;
|
|
for(;;) {
|
|
q = ext1;
|
|
while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
|
|
*q++ = *p++;
|
|
*q = '\0';
|
|
if (!strcasecmp(ext1, ext))
|
|
return 1;
|
|
if (*p == '\0')
|
|
break;
|
|
p++;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int match_format(const char *name, const char *names)
|
|
{
|
|
const char *p;
|
|
int len, namelen;
|
|
|
|
if (!name || !names)
|
|
return 0;
|
|
|
|
namelen = strlen(name);
|
|
while ((p = strchr(names, ','))) {
|
|
len = FFMAX(p - names, namelen);
|
|
if (!strncasecmp(name, names, len))
|
|
return 1;
|
|
names = p+1;
|
|
}
|
|
return !strcasecmp(name, names);
|
|
}
|
|
|
|
AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
|
|
const char *mime_type)
|
|
{
|
|
AVOutputFormat *fmt = NULL, *fmt_found;
|
|
int score_max, score;
|
|
|
|
/* specific test for image sequences */
|
|
#if CONFIG_IMAGE2_MUXER
|
|
if (!short_name && filename &&
|
|
av_filename_number_test(filename) &&
|
|
ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
|
|
return av_guess_format("image2", NULL, NULL);
|
|
}
|
|
#endif
|
|
/* Find the proper file type. */
|
|
fmt_found = NULL;
|
|
score_max = 0;
|
|
while ((fmt = av_oformat_next(fmt))) {
|
|
score = 0;
|
|
if (fmt->name && short_name && !strcmp(fmt->name, short_name))
|
|
score += 100;
|
|
if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
|
|
score += 10;
|
|
if (filename && fmt->extensions &&
|
|
av_match_ext(filename, fmt->extensions)) {
|
|
score += 5;
|
|
}
|
|
if (score > score_max) {
|
|
score_max = score;
|
|
fmt_found = fmt;
|
|
}
|
|
}
|
|
return fmt_found;
|
|
}
|
|
|
|
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
|
|
const char *filename, const char *mime_type, enum AVMediaType type){
|
|
if(type == AVMEDIA_TYPE_VIDEO){
|
|
enum CodecID codec_id= CODEC_ID_NONE;
|
|
|
|
#if CONFIG_IMAGE2_MUXER
|
|
if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
|
|
codec_id= ff_guess_image2_codec(filename);
|
|
}
|
|
#endif
|
|
if(codec_id == CODEC_ID_NONE)
|
|
codec_id= fmt->video_codec;
|
|
return codec_id;
|
|
}else if(type == AVMEDIA_TYPE_AUDIO)
|
|
return fmt->audio_codec;
|
|
else if (type == AVMEDIA_TYPE_SUBTITLE)
|
|
return fmt->subtitle_codec;
|
|
else
|
|
return CODEC_ID_NONE;
|
|
}
|
|
|
|
AVInputFormat *av_find_input_format(const char *short_name)
|
|
{
|
|
AVInputFormat *fmt = NULL;
|
|
while ((fmt = av_iformat_next(fmt))) {
|
|
if (match_format(short_name, fmt->name))
|
|
return fmt;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
|
|
{
|
|
int ret= av_new_packet(pkt, size);
|
|
|
|
if(ret<0)
|
|
return ret;
|
|
|
|
pkt->pos= avio_tell(s);
|
|
|
|
ret= avio_read(s, pkt->data, size);
|
|
if(ret<=0)
|
|
av_free_packet(pkt);
|
|
else
|
|
av_shrink_packet(pkt, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
|
|
{
|
|
int ret;
|
|
int old_size;
|
|
if (!pkt->size)
|
|
return av_get_packet(s, pkt, size);
|
|
old_size = pkt->size;
|
|
ret = av_grow_packet(pkt, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = avio_read(s, pkt->data + old_size, size);
|
|
av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
|
|
return ret;
|
|
}
|
|
|
|
|
|
int av_filename_number_test(const char *filename)
|
|
{
|
|
char buf[1024];
|
|
return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
|
|
}
|
|
|
|
AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
|
|
{
|
|
AVProbeData lpd = *pd;
|
|
AVInputFormat *fmt1 = NULL, *fmt;
|
|
int score, score_max=0;
|
|
|
|
if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
|
|
int id3len = ff_id3v2_tag_len(lpd.buf);
|
|
if (lpd.buf_size > id3len + 16) {
|
|
lpd.buf += id3len;
|
|
lpd.buf_size -= id3len;
|
|
}
|
|
}
|
|
|
|
fmt = NULL;
|
|
while ((fmt1 = av_iformat_next(fmt1))) {
|
|
if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
|
|
continue;
|
|
score = 0;
|
|
if (fmt1->read_probe) {
|
|
score = fmt1->read_probe(&lpd);
|
|
if(!score && fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
|
|
score = 1;
|
|
} else if (fmt1->extensions) {
|
|
if (av_match_ext(lpd.filename, fmt1->extensions)) {
|
|
score = 50;
|
|
}
|
|
}
|
|
if (score > score_max) {
|
|
score_max = score;
|
|
fmt = fmt1;
|
|
}else if (score == score_max)
|
|
fmt = NULL;
|
|
}
|
|
*score_ret= score_max;
|
|
return fmt;
|
|
}
|
|
|
|
AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
|
|
{
|
|
int score_ret;
|
|
AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
|
|
if(score_ret > *score_max){
|
|
*score_max= score_ret;
|
|
return fmt;
|
|
}else
|
|
return NULL;
|
|
}
|
|
|
|
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
|
|
int score=0;
|
|
return av_probe_input_format2(pd, is_opened, &score);
|
|
}
|
|
|
|
static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
|
|
{
|
|
static const struct {
|
|
const char *name; enum CodecID id; enum AVMediaType type;
|
|
} fmt_id_type[] = {
|
|
{ "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
|
|
{ "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
|
|
{ "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
|
|
{ "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
|
|
{ "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
|
|
{ "loas" , CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
|
|
{ "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
|
|
{ "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
|
|
{ "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
|
|
{ 0 }
|
|
};
|
|
int score;
|
|
AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
|
|
|
|
if (fmt) {
|
|
int i;
|
|
av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
|
|
pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
|
|
for (i = 0; fmt_id_type[i].name; i++) {
|
|
if (!strcmp(fmt->name, fmt_id_type[i].name)) {
|
|
st->codec->codec_id = fmt_id_type[i].id;
|
|
st->codec->codec_type = fmt_id_type[i].type;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return score;
|
|
}
|
|
|
|
/************************************************************/
|
|
/* input media file */
|
|
|
|
#if FF_API_FORMAT_PARAMETERS
|
|
static AVDictionary *convert_format_parameters(AVFormatParameters *ap)
|
|
{
|
|
char buf[1024];
|
|
AVDictionary *opts = NULL;
|
|
|
|
if (!ap)
|
|
return NULL;
|
|
|
|
AV_NOWARN_DEPRECATED(
|
|
if (ap->time_base.num) {
|
|
snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num);
|
|
av_dict_set(&opts, "framerate", buf, 0);
|
|
}
|
|
if (ap->sample_rate) {
|
|
snprintf(buf, sizeof(buf), "%d", ap->sample_rate);
|
|
av_dict_set(&opts, "sample_rate", buf, 0);
|
|
}
|
|
if (ap->channels) {
|
|
snprintf(buf, sizeof(buf), "%d", ap->channels);
|
|
av_dict_set(&opts, "channels", buf, 0);
|
|
}
|
|
if (ap->width || ap->height) {
|
|
snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height);
|
|
av_dict_set(&opts, "video_size", buf, 0);
|
|
}
|
|
if (ap->pix_fmt != PIX_FMT_NONE) {
|
|
av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0);
|
|
}
|
|
if (ap->channel) {
|
|
snprintf(buf, sizeof(buf), "%d", ap->channel);
|
|
av_dict_set(&opts, "channel", buf, 0);
|
|
}
|
|
if (ap->standard) {
|
|
av_dict_set(&opts, "standard", ap->standard, 0);
|
|
}
|
|
if (ap->mpeg2ts_compute_pcr) {
|
|
av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0);
|
|
}
|
|
if (ap->initial_pause) {
|
|
av_dict_set(&opts, "initial_pause", "1", 0);
|
|
}
|
|
)
|
|
return opts;
|
|
}
|
|
|
|
/**
|
|
* Open a media file from an IO stream. 'fmt' must be specified.
|
|
*/
|
|
int av_open_input_stream(AVFormatContext **ic_ptr,
|
|
AVIOContext *pb, const char *filename,
|
|
AVInputFormat *fmt, AVFormatParameters *ap)
|
|
{
|
|
int err;
|
|
AVDictionary *opts;
|
|
AVFormatContext *ic;
|
|
AVFormatParameters default_ap;
|
|
|
|
if(!ap){
|
|
ap=&default_ap;
|
|
memset(ap, 0, sizeof(default_ap));
|
|
}
|
|
opts = convert_format_parameters(ap);
|
|
|
|
AV_NOWARN_DEPRECATED(
|
|
if(!ap->prealloced_context)
|
|
*ic_ptr = ic = avformat_alloc_context();
|
|
else
|
|
ic = *ic_ptr;
|
|
)
|
|
if (!ic) {
|
|
err = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
if (pb && fmt && fmt->flags & AVFMT_NOFILE)
|
|
av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
|
|
"will be ignored with AVFMT_NOFILE format.\n");
|
|
else
|
|
ic->pb = pb;
|
|
|
|
if ((err = avformat_open_input(&ic, filename, fmt, &opts)) < 0)
|
|
goto fail;
|
|
ic->pb = ic->pb ? ic->pb : pb; // don't leak custom pb if it wasn't set above
|
|
|
|
fail:
|
|
*ic_ptr = ic;
|
|
av_dict_free(&opts);
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap){
|
|
int err;
|
|
|
|
if (ic->iformat->read_header) {
|
|
err = ic->iformat->read_header(ic, ap);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (ic->pb && !ic->data_offset)
|
|
ic->data_offset = avio_tell(ic->pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/** size of probe buffer, for guessing file type from file contents */
|
|
#define PROBE_BUF_MIN 2048
|
|
#define PROBE_BUF_MAX (1<<20)
|
|
|
|
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
|
|
const char *filename, void *logctx,
|
|
unsigned int offset, unsigned int max_probe_size)
|
|
{
|
|
AVProbeData pd = { filename ? filename : "", NULL, -offset };
|
|
unsigned char *buf = NULL;
|
|
int ret = 0, probe_size;
|
|
|
|
if (!max_probe_size) {
|
|
max_probe_size = PROBE_BUF_MAX;
|
|
} else if (max_probe_size > PROBE_BUF_MAX) {
|
|
max_probe_size = PROBE_BUF_MAX;
|
|
} else if (max_probe_size < PROBE_BUF_MIN) {
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (offset >= max_probe_size) {
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
|
|
probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
|
|
int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
|
|
int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
|
|
void *buftmp;
|
|
|
|
if (probe_size < offset) {
|
|
continue;
|
|
}
|
|
|
|
/* read probe data */
|
|
buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
|
|
if(!buftmp){
|
|
av_free(buf);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
buf=buftmp;
|
|
if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
|
|
/* fail if error was not end of file, otherwise, lower score */
|
|
if (ret != AVERROR_EOF) {
|
|
av_free(buf);
|
|
return ret;
|
|
}
|
|
score = 0;
|
|
ret = 0; /* error was end of file, nothing read */
|
|
}
|
|
pd.buf_size += ret;
|
|
pd.buf = &buf[offset];
|
|
|
|
memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
|
|
|
|
/* guess file format */
|
|
*fmt = av_probe_input_format2(&pd, 1, &score);
|
|
if(*fmt){
|
|
if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
|
|
av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
|
|
}else
|
|
av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
|
|
}
|
|
}
|
|
|
|
if (!*fmt) {
|
|
av_free(buf);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* rewind. reuse probe buffer to avoid seeking */
|
|
if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
|
|
av_free(buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#if FF_API_FORMAT_PARAMETERS
|
|
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
|
|
AVInputFormat *fmt,
|
|
int buf_size,
|
|
AVFormatParameters *ap)
|
|
{
|
|
int err;
|
|
AVDictionary *opts = convert_format_parameters(ap);
|
|
|
|
AV_NOWARN_DEPRECATED(
|
|
if (!ap || !ap->prealloced_context)
|
|
*ic_ptr = NULL;
|
|
)
|
|
|
|
err = avformat_open_input(ic_ptr, filename, fmt, &opts);
|
|
|
|
av_dict_free(&opts);
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
/* open input file and probe the format if necessary */
|
|
static int init_input(AVFormatContext *s, const char *filename)
|
|
{
|
|
int ret;
|
|
AVProbeData pd = {filename, NULL, 0};
|
|
|
|
if (s->pb) {
|
|
s->flags |= AVFMT_FLAG_CUSTOM_IO;
|
|
if (!s->iformat)
|
|
return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
|
|
else if (s->iformat->flags & AVFMT_NOFILE)
|
|
av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
|
|
"will be ignored with AVFMT_NOFILE format.\n");
|
|
return 0;
|
|
}
|
|
|
|
if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
|
|
(!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
|
|
return 0;
|
|
|
|
if ((ret = avio_open(&s->pb, filename, AVIO_FLAG_READ)) < 0)
|
|
return ret;
|
|
if (s->iformat)
|
|
return 0;
|
|
return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
|
|
}
|
|
|
|
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
|
|
{
|
|
AVFormatContext *s = *ps;
|
|
int ret = 0;
|
|
AVFormatParameters ap = { { 0 } };
|
|
AVDictionary *tmp = NULL;
|
|
|
|
if (!s && !(s = avformat_alloc_context()))
|
|
return AVERROR(ENOMEM);
|
|
if (fmt)
|
|
s->iformat = fmt;
|
|
|
|
if (options)
|
|
av_dict_copy(&tmp, *options, 0);
|
|
|
|
if ((ret = av_opt_set_dict(s, &tmp)) < 0)
|
|
goto fail;
|
|
|
|
if ((ret = init_input(s, filename)) < 0)
|
|
goto fail;
|
|
|
|
/* check filename in case an image number is expected */
|
|
if (s->iformat->flags & AVFMT_NEEDNUMBER) {
|
|
if (!av_filename_number_test(filename)) {
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
s->duration = s->start_time = AV_NOPTS_VALUE;
|
|
av_strlcpy(s->filename, filename, sizeof(s->filename));
|
|
|
|
/* allocate private data */
|
|
if (s->iformat->priv_data_size > 0) {
|
|
if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
if (s->iformat->priv_class) {
|
|
*(const AVClass**)s->priv_data = s->iformat->priv_class;
|
|
av_opt_set_defaults(s->priv_data);
|
|
if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
|
|
if (s->pb)
|
|
ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
|
|
|
|
if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
|
|
if ((ret = s->iformat->read_header(s, &ap)) < 0)
|
|
goto fail;
|
|
|
|
if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
|
|
s->data_offset = avio_tell(s->pb);
|
|
|
|
s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
|
|
|
|
if (options) {
|
|
av_dict_free(options);
|
|
*options = tmp;
|
|
}
|
|
*ps = s;
|
|
return 0;
|
|
|
|
fail:
|
|
av_dict_free(&tmp);
|
|
if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
|
|
avio_close(s->pb);
|
|
avformat_free_context(s);
|
|
*ps = NULL;
|
|
return ret;
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
|
|
AVPacketList **plast_pktl){
|
|
AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
|
|
if (!pktl)
|
|
return NULL;
|
|
|
|
if (*packet_buffer)
|
|
(*plast_pktl)->next = pktl;
|
|
else
|
|
*packet_buffer = pktl;
|
|
|
|
/* add the packet in the buffered packet list */
|
|
*plast_pktl = pktl;
|
|
pktl->pkt= *pkt;
|
|
return &pktl->pkt;
|
|
}
|
|
|
|
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret, i;
|
|
AVStream *st;
|
|
|
|
for(;;){
|
|
AVPacketList *pktl = s->raw_packet_buffer;
|
|
|
|
if (pktl) {
|
|
*pkt = pktl->pkt;
|
|
if(s->streams[pkt->stream_index]->request_probe <= 0){
|
|
s->raw_packet_buffer = pktl->next;
|
|
s->raw_packet_buffer_remaining_size += pkt->size;
|
|
av_free(pktl);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
av_init_packet(pkt);
|
|
ret= s->iformat->read_packet(s, pkt);
|
|
if (ret < 0) {
|
|
if (!pktl || ret == AVERROR(EAGAIN))
|
|
return ret;
|
|
for (i = 0; i < s->nb_streams; i++)
|
|
if(s->streams[i]->request_probe > 0)
|
|
s->streams[i]->request_probe = -1;
|
|
continue;
|
|
}
|
|
|
|
if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
|
|
(pkt->flags & AV_PKT_FLAG_CORRUPT)) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Dropped corrupted packet (stream = %d)\n",
|
|
pkt->stream_index);
|
|
continue;
|
|
}
|
|
|
|
if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
|
|
av_packet_merge_side_data(pkt);
|
|
|
|
st= s->streams[pkt->stream_index];
|
|
|
|
switch(st->codec->codec_type){
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
|
|
break;
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
|
|
break;
|
|
}
|
|
|
|
if(!pktl && st->request_probe <= 0)
|
|
return ret;
|
|
|
|
add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
|
|
s->raw_packet_buffer_remaining_size -= pkt->size;
|
|
|
|
if(st->request_probe>0){
|
|
AVProbeData *pd = &st->probe_data;
|
|
int end;
|
|
av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
|
|
--st->probe_packets;
|
|
|
|
pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
|
|
memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
|
|
pd->buf_size += pkt->size;
|
|
memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
|
|
|
|
end= s->raw_packet_buffer_remaining_size <= 0
|
|
|| st->probe_packets<=0;
|
|
|
|
if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
|
|
int score= set_codec_from_probe_data(s, st, pd);
|
|
if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
|
|
|| end){
|
|
pd->buf_size=0;
|
|
av_freep(&pd->buf);
|
|
st->request_probe= -1;
|
|
if(st->codec->codec_id != CODEC_ID_NONE){
|
|
av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
|
|
}else
|
|
av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**********************************************************/
|
|
|
|
/**
|
|
* Get the number of samples of an audio frame. Return -1 on error.
|
|
*/
|
|
static int get_audio_frame_size(AVCodecContext *enc, int size)
|
|
{
|
|
int frame_size;
|
|
|
|
if(enc->codec_id == CODEC_ID_VORBIS)
|
|
return -1;
|
|
|
|
if (enc->frame_size <= 1) {
|
|
int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
|
|
|
|
if (bits_per_sample) {
|
|
if (enc->channels == 0)
|
|
return -1;
|
|
frame_size = (size << 3) / (bits_per_sample * enc->channels);
|
|
} else {
|
|
/* used for example by ADPCM codecs */
|
|
if (enc->bit_rate == 0)
|
|
return -1;
|
|
frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
|
|
}
|
|
} else {
|
|
frame_size = enc->frame_size;
|
|
}
|
|
return frame_size;
|
|
}
|
|
|
|
|
|
/**
|
|
* Return the frame duration in seconds. Return 0 if not available.
|
|
*/
|
|
static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
|
|
AVCodecParserContext *pc, AVPacket *pkt)
|
|
{
|
|
int frame_size;
|
|
|
|
*pnum = 0;
|
|
*pden = 0;
|
|
switch(st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if(st->time_base.num*1000LL > st->time_base.den){
|
|
*pnum = st->time_base.num;
|
|
*pden = st->time_base.den;
|
|
}else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
|
|
*pnum = st->codec->time_base.num;
|
|
*pden = st->codec->time_base.den;
|
|
if (pc && pc->repeat_pict) {
|
|
*pnum = (*pnum) * (1 + pc->repeat_pict);
|
|
}
|
|
//If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
|
|
//Thus if we have no parser in such case leave duration undefined.
|
|
if(st->codec->ticks_per_frame>1 && !pc){
|
|
*pnum = *pden = 0;
|
|
}
|
|
}
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
frame_size = get_audio_frame_size(st->codec, pkt->size);
|
|
if (frame_size <= 0 || st->codec->sample_rate <= 0)
|
|
break;
|
|
*pnum = frame_size;
|
|
*pden = st->codec->sample_rate;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int is_intra_only(AVCodecContext *enc){
|
|
if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
|
|
return 1;
|
|
}else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
|
|
switch(enc->codec_id){
|
|
case CODEC_ID_MJPEG:
|
|
case CODEC_ID_MJPEGB:
|
|
case CODEC_ID_LJPEG:
|
|
case CODEC_ID_PRORES:
|
|
case CODEC_ID_RAWVIDEO:
|
|
case CODEC_ID_DVVIDEO:
|
|
case CODEC_ID_HUFFYUV:
|
|
case CODEC_ID_FFVHUFF:
|
|
case CODEC_ID_ASV1:
|
|
case CODEC_ID_ASV2:
|
|
case CODEC_ID_VCR1:
|
|
case CODEC_ID_DNXHD:
|
|
case CODEC_ID_JPEG2000:
|
|
return 1;
|
|
default: break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void update_initial_timestamps(AVFormatContext *s, int stream_index,
|
|
int64_t dts, int64_t pts)
|
|
{
|
|
AVStream *st= s->streams[stream_index];
|
|
AVPacketList *pktl= s->packet_buffer;
|
|
|
|
if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
|
|
return;
|
|
|
|
st->first_dts= dts - st->cur_dts;
|
|
st->cur_dts= dts;
|
|
|
|
for(; pktl; pktl= pktl->next){
|
|
if(pktl->pkt.stream_index != stream_index)
|
|
continue;
|
|
//FIXME think more about this check
|
|
if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
|
|
pktl->pkt.pts += st->first_dts;
|
|
|
|
if(pktl->pkt.dts != AV_NOPTS_VALUE)
|
|
pktl->pkt.dts += st->first_dts;
|
|
|
|
if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
|
|
st->start_time= pktl->pkt.pts;
|
|
}
|
|
if (st->start_time == AV_NOPTS_VALUE)
|
|
st->start_time = pts;
|
|
}
|
|
|
|
static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
|
|
{
|
|
AVPacketList *pktl= s->packet_buffer;
|
|
int64_t cur_dts= 0;
|
|
|
|
if(st->first_dts != AV_NOPTS_VALUE){
|
|
cur_dts= st->first_dts;
|
|
for(; pktl; pktl= pktl->next){
|
|
if(pktl->pkt.stream_index == pkt->stream_index){
|
|
if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
|
|
break;
|
|
cur_dts -= pkt->duration;
|
|
}
|
|
}
|
|
pktl= s->packet_buffer;
|
|
st->first_dts = cur_dts;
|
|
}else if(st->cur_dts)
|
|
return;
|
|
|
|
for(; pktl; pktl= pktl->next){
|
|
if(pktl->pkt.stream_index != pkt->stream_index)
|
|
continue;
|
|
if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
|
|
&& !pktl->pkt.duration){
|
|
pktl->pkt.dts= cur_dts;
|
|
if(!st->codec->has_b_frames)
|
|
pktl->pkt.pts= cur_dts;
|
|
cur_dts += pkt->duration;
|
|
pktl->pkt.duration= pkt->duration;
|
|
}else
|
|
break;
|
|
}
|
|
if(st->first_dts == AV_NOPTS_VALUE)
|
|
st->cur_dts= cur_dts;
|
|
}
|
|
|
|
static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
|
|
AVCodecParserContext *pc, AVPacket *pkt)
|
|
{
|
|
int num, den, presentation_delayed, delay, i;
|
|
int64_t offset;
|
|
|
|
if (s->flags & AVFMT_FLAG_NOFILLIN)
|
|
return;
|
|
|
|
if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->dts= AV_NOPTS_VALUE;
|
|
|
|
if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
|
|
//FIXME Set low_delay = 0 when has_b_frames = 1
|
|
st->codec->has_b_frames = 1;
|
|
|
|
/* do we have a video B-frame ? */
|
|
delay= st->codec->has_b_frames;
|
|
presentation_delayed = 0;
|
|
|
|
// ignore delay caused by frame threading so that the mpeg2-without-dts
|
|
// warning will not trigger
|
|
if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
|
|
delay -= st->codec->thread_count-1;
|
|
|
|
/* XXX: need has_b_frame, but cannot get it if the codec is
|
|
not initialized */
|
|
if (delay &&
|
|
pc && pc->pict_type != AV_PICTURE_TYPE_B)
|
|
presentation_delayed = 1;
|
|
|
|
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts && st->pts_wrap_bits<63){
|
|
pkt->dts -= 1LL<<st->pts_wrap_bits;
|
|
}
|
|
|
|
// some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
|
|
// we take the conservative approach and discard both
|
|
// Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
|
|
if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
|
|
av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
|
|
pkt->dts= pkt->pts= AV_NOPTS_VALUE;
|
|
}
|
|
|
|
if (pkt->duration == 0) {
|
|
compute_frame_duration(&num, &den, st, pc, pkt);
|
|
if (den && num) {
|
|
pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
|
|
|
|
if(pkt->duration != 0 && s->packet_buffer)
|
|
update_initial_durations(s, st, pkt);
|
|
}
|
|
}
|
|
|
|
/* correct timestamps with byte offset if demuxers only have timestamps
|
|
on packet boundaries */
|
|
if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
|
|
/* this will estimate bitrate based on this frame's duration and size */
|
|
offset = av_rescale(pc->offset, pkt->duration, pkt->size);
|
|
if(pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->pts += offset;
|
|
if(pkt->dts != AV_NOPTS_VALUE)
|
|
pkt->dts += offset;
|
|
}
|
|
|
|
if (pc && pc->dts_sync_point >= 0) {
|
|
// we have synchronization info from the parser
|
|
int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
|
|
if (den > 0) {
|
|
int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
|
|
if (pkt->dts != AV_NOPTS_VALUE) {
|
|
// got DTS from the stream, update reference timestamp
|
|
st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
|
|
pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
|
|
} else if (st->reference_dts != AV_NOPTS_VALUE) {
|
|
// compute DTS based on reference timestamp
|
|
pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
|
|
pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
|
|
}
|
|
if (pc->dts_sync_point > 0)
|
|
st->reference_dts = pkt->dts; // new reference
|
|
}
|
|
}
|
|
|
|
/* This may be redundant, but it should not hurt. */
|
|
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
|
|
presentation_delayed = 1;
|
|
|
|
// av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc);
|
|
/* interpolate PTS and DTS if they are not present */
|
|
//We skip H264 currently because delay and has_b_frames are not reliably set
|
|
if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
|
|
if (presentation_delayed) {
|
|
/* DTS = decompression timestamp */
|
|
/* PTS = presentation timestamp */
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
pkt->dts = st->last_IP_pts;
|
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
pkt->dts = st->cur_dts;
|
|
|
|
/* this is tricky: the dts must be incremented by the duration
|
|
of the frame we are displaying, i.e. the last I- or P-frame */
|
|
if (st->last_IP_duration == 0)
|
|
st->last_IP_duration = pkt->duration;
|
|
if(pkt->dts != AV_NOPTS_VALUE)
|
|
st->cur_dts = pkt->dts + st->last_IP_duration;
|
|
st->last_IP_duration = pkt->duration;
|
|
st->last_IP_pts= pkt->pts;
|
|
/* cannot compute PTS if not present (we can compute it only
|
|
by knowing the future */
|
|
} else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
|
|
if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
|
|
int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
|
|
int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
|
|
if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
|
|
pkt->pts += pkt->duration;
|
|
// av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
|
|
}
|
|
}
|
|
|
|
/* presentation is not delayed : PTS and DTS are the same */
|
|
if(pkt->pts == AV_NOPTS_VALUE)
|
|
pkt->pts = pkt->dts;
|
|
update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
|
|
if(pkt->pts == AV_NOPTS_VALUE)
|
|
pkt->pts = st->cur_dts;
|
|
pkt->dts = pkt->pts;
|
|
if(pkt->pts != AV_NOPTS_VALUE)
|
|
st->cur_dts = pkt->pts + pkt->duration;
|
|
}
|
|
}
|
|
|
|
if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
|
|
st->pts_buffer[0]= pkt->pts;
|
|
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
|
|
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
|
|
if(pkt->dts == AV_NOPTS_VALUE)
|
|
pkt->dts= st->pts_buffer[0];
|
|
if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
|
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
|
|
}
|
|
if(pkt->dts > st->cur_dts)
|
|
st->cur_dts = pkt->dts;
|
|
}
|
|
|
|
// av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
|
|
|
|
/* update flags */
|
|
if(is_intra_only(st->codec))
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
else if (pc) {
|
|
pkt->flags = 0;
|
|
/* keyframe computation */
|
|
if (pc->key_frame == 1)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
}
|
|
if (pc)
|
|
pkt->convergence_duration = pc->convergence_duration;
|
|
}
|
|
|
|
|
|
static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVStream *st;
|
|
int len, ret, i;
|
|
|
|
av_init_packet(pkt);
|
|
|
|
for(;;) {
|
|
/* select current input stream component */
|
|
st = s->cur_st;
|
|
if (st) {
|
|
if (!st->need_parsing || !st->parser) {
|
|
/* no parsing needed: we just output the packet as is */
|
|
/* raw data support */
|
|
*pkt = st->cur_pkt;
|
|
st->cur_pkt.data= NULL;
|
|
st->cur_pkt.side_data_elems = 0;
|
|
st->cur_pkt.side_data = NULL;
|
|
compute_pkt_fields(s, st, NULL, pkt);
|
|
s->cur_st = NULL;
|
|
if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
|
|
(pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
|
|
ff_reduce_index(s, st->index);
|
|
av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
break;
|
|
} else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
|
|
len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
|
|
st->cur_ptr, st->cur_len,
|
|
st->cur_pkt.pts, st->cur_pkt.dts,
|
|
st->cur_pkt.pos);
|
|
st->cur_pkt.pts = AV_NOPTS_VALUE;
|
|
st->cur_pkt.dts = AV_NOPTS_VALUE;
|
|
/* increment read pointer */
|
|
st->cur_ptr += len;
|
|
st->cur_len -= len;
|
|
|
|
/* return packet if any */
|
|
if (pkt->size) {
|
|
got_packet:
|
|
pkt->duration = 0;
|
|
pkt->stream_index = st->index;
|
|
pkt->pts = st->parser->pts;
|
|
pkt->dts = st->parser->dts;
|
|
pkt->pos = st->parser->pos;
|
|
if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
|
|
s->cur_st = NULL;
|
|
pkt->destruct= st->cur_pkt.destruct;
|
|
st->cur_pkt.destruct= NULL;
|
|
st->cur_pkt.data = NULL;
|
|
assert(st->cur_len == 0);
|
|
}else{
|
|
pkt->destruct = NULL;
|
|
}
|
|
compute_pkt_fields(s, st, st->parser, pkt);
|
|
|
|
if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
|
|
int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->pos : st->parser->frame_offset;
|
|
ff_reduce_index(s, st->index);
|
|
av_add_index_entry(st, pos, pkt->dts,
|
|
0, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
|
|
break;
|
|
}
|
|
} else {
|
|
/* free packet */
|
|
av_free_packet(&st->cur_pkt);
|
|
s->cur_st = NULL;
|
|
}
|
|
} else {
|
|
AVPacket cur_pkt;
|
|
/* read next packet */
|
|
ret = av_read_packet(s, &cur_pkt);
|
|
if (ret < 0) {
|
|
if (ret == AVERROR(EAGAIN))
|
|
return ret;
|
|
/* return the last frames, if any */
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
if (st->parser && st->need_parsing) {
|
|
av_parser_parse2(st->parser, st->codec,
|
|
&pkt->data, &pkt->size,
|
|
NULL, 0,
|
|
AV_NOPTS_VALUE, AV_NOPTS_VALUE,
|
|
AV_NOPTS_VALUE);
|
|
if (pkt->size)
|
|
goto got_packet;
|
|
}
|
|
}
|
|
/* no more packets: really terminate parsing */
|
|
return ret;
|
|
}
|
|
st = s->streams[cur_pkt.stream_index];
|
|
st->cur_pkt= cur_pkt;
|
|
|
|
if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
|
|
st->cur_pkt.dts != AV_NOPTS_VALUE &&
|
|
st->cur_pkt.pts < st->cur_pkt.dts){
|
|
av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
|
|
st->cur_pkt.stream_index,
|
|
st->cur_pkt.pts,
|
|
st->cur_pkt.dts,
|
|
st->cur_pkt.size);
|
|
// av_free_packet(&st->cur_pkt);
|
|
// return -1;
|
|
}
|
|
|
|
if(s->debug & FF_FDEBUG_TS)
|
|
av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
|
|
st->cur_pkt.stream_index,
|
|
st->cur_pkt.pts,
|
|
st->cur_pkt.dts,
|
|
st->cur_pkt.size,
|
|
st->cur_pkt.duration,
|
|
st->cur_pkt.flags);
|
|
|
|
s->cur_st = st;
|
|
st->cur_ptr = st->cur_pkt.data;
|
|
st->cur_len = st->cur_pkt.size;
|
|
if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
|
|
st->parser = av_parser_init(st->codec->codec_id);
|
|
if (!st->parser) {
|
|
av_log(s, AV_LOG_WARNING, "parser not found for codec "
|
|
"%s, packets or times may be invalid.\n",
|
|
avcodec_get_name(st->codec->codec_id));
|
|
/* no parser available: just output the raw packets */
|
|
st->need_parsing = AVSTREAM_PARSE_NONE;
|
|
}else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
|
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
|
|
}else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
|
|
st->parser->flags |= PARSER_FLAG_ONCE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(s->debug & FF_FDEBUG_TS)
|
|
av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
|
|
pkt->stream_index,
|
|
pkt->pts,
|
|
pkt->dts,
|
|
pkt->size,
|
|
pkt->duration,
|
|
pkt->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVPacketList *pktl;
|
|
int eof=0;
|
|
const int genpts= s->flags & AVFMT_FLAG_GENPTS;
|
|
|
|
for(;;){
|
|
pktl = s->packet_buffer;
|
|
if (pktl) {
|
|
AVPacket *next_pkt= &pktl->pkt;
|
|
|
|
if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
|
|
int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
|
|
while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
|
|
if( pktl->pkt.stream_index == next_pkt->stream_index
|
|
&& (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
|
|
&& av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
|
|
next_pkt->pts= pktl->pkt.dts;
|
|
}
|
|
pktl= pktl->next;
|
|
}
|
|
pktl = s->packet_buffer;
|
|
}
|
|
|
|
if( next_pkt->pts != AV_NOPTS_VALUE
|
|
|| next_pkt->dts == AV_NOPTS_VALUE
|
|
|| !genpts || eof){
|
|
/* read packet from packet buffer, if there is data */
|
|
*pkt = *next_pkt;
|
|
s->packet_buffer = pktl->next;
|
|
av_free(pktl);
|
|
return 0;
|
|
}
|
|
}
|
|
if(genpts){
|
|
int ret= read_frame_internal(s, pkt);
|
|
if(ret<0){
|
|
if(pktl && ret != AVERROR(EAGAIN)){
|
|
eof=1;
|
|
continue;
|
|
}else
|
|
return ret;
|
|
}
|
|
|
|
if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
|
|
&s->packet_buffer_end)) < 0)
|
|
return AVERROR(ENOMEM);
|
|
}else{
|
|
assert(!s->packet_buffer);
|
|
return read_frame_internal(s, pkt);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* XXX: suppress the packet queue */
|
|
static void flush_packet_queue(AVFormatContext *s)
|
|
{
|
|
AVPacketList *pktl;
|
|
|
|
for(;;) {
|
|
pktl = s->packet_buffer;
|
|
if (!pktl)
|
|
break;
|
|
s->packet_buffer = pktl->next;
|
|
av_free_packet(&pktl->pkt);
|
|
av_free(pktl);
|
|
}
|
|
while(s->raw_packet_buffer){
|
|
pktl = s->raw_packet_buffer;
|
|
s->raw_packet_buffer = pktl->next;
|
|
av_free_packet(&pktl->pkt);
|
|
av_free(pktl);
|
|
}
|
|
s->packet_buffer_end=
|
|
s->raw_packet_buffer_end= NULL;
|
|
s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
|
|
}
|
|
|
|
/*******************************************************/
|
|
/* seek support */
|
|
|
|
int av_find_default_stream_index(AVFormatContext *s)
|
|
{
|
|
int first_audio_index = -1;
|
|
int i;
|
|
AVStream *st;
|
|
|
|
if (s->nb_streams <= 0)
|
|
return -1;
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
return i;
|
|
}
|
|
if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
|
|
first_audio_index = i;
|
|
}
|
|
return first_audio_index >= 0 ? first_audio_index : 0;
|
|
}
|
|
|
|
/**
|
|
* Flush the frame reader.
|
|
*/
|
|
void ff_read_frame_flush(AVFormatContext *s)
|
|
{
|
|
AVStream *st;
|
|
int i, j;
|
|
|
|
flush_packet_queue(s);
|
|
|
|
s->cur_st = NULL;
|
|
|
|
/* for each stream, reset read state */
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
|
|
if (st->parser) {
|
|
av_parser_close(st->parser);
|
|
st->parser = NULL;
|
|
av_free_packet(&st->cur_pkt);
|
|
}
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
|
|
st->reference_dts = AV_NOPTS_VALUE;
|
|
/* fail safe */
|
|
st->cur_ptr = NULL;
|
|
st->cur_len = 0;
|
|
|
|
st->probe_packets = MAX_PROBE_PACKETS;
|
|
|
|
for(j=0; j<MAX_REORDER_DELAY+1; j++)
|
|
st->pts_buffer[j]= AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
|
|
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
|
|
int i;
|
|
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
|
|
st->cur_dts = av_rescale(timestamp,
|
|
st->time_base.den * (int64_t)ref_st->time_base.num,
|
|
st->time_base.num * (int64_t)ref_st->time_base.den);
|
|
}
|
|
}
|
|
|
|
void ff_reduce_index(AVFormatContext *s, int stream_index)
|
|
{
|
|
AVStream *st= s->streams[stream_index];
|
|
unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
|
|
|
|
if((unsigned)st->nb_index_entries >= max_entries){
|
|
int i;
|
|
for(i=0; 2*i<st->nb_index_entries; i++)
|
|
st->index_entries[i]= st->index_entries[2*i];
|
|
st->nb_index_entries= i;
|
|
}
|
|
}
|
|
|
|
int ff_add_index_entry(AVIndexEntry **index_entries,
|
|
int *nb_index_entries,
|
|
unsigned int *index_entries_allocated_size,
|
|
int64_t pos, int64_t timestamp, int size, int distance, int flags)
|
|
{
|
|
AVIndexEntry *entries, *ie;
|
|
int index;
|
|
|
|
if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
|
|
return -1;
|
|
|
|
entries = av_fast_realloc(*index_entries,
|
|
index_entries_allocated_size,
|
|
(*nb_index_entries + 1) *
|
|
sizeof(AVIndexEntry));
|
|
if(!entries)
|
|
return -1;
|
|
|
|
*index_entries= entries;
|
|
|
|
index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
|
|
|
|
if(index<0){
|
|
index= (*nb_index_entries)++;
|
|
ie= &entries[index];
|
|
assert(index==0 || ie[-1].timestamp < timestamp);
|
|
}else{
|
|
ie= &entries[index];
|
|
if(ie->timestamp != timestamp){
|
|
if(ie->timestamp <= timestamp)
|
|
return -1;
|
|
memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
|
|
(*nb_index_entries)++;
|
|
}else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
|
|
distance= ie->min_distance;
|
|
}
|
|
|
|
ie->pos = pos;
|
|
ie->timestamp = timestamp;
|
|
ie->min_distance= distance;
|
|
ie->size= size;
|
|
ie->flags = flags;
|
|
|
|
return index;
|
|
}
|
|
|
|
int av_add_index_entry(AVStream *st,
|
|
int64_t pos, int64_t timestamp, int size, int distance, int flags)
|
|
{
|
|
return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
|
|
&st->index_entries_allocated_size, pos,
|
|
timestamp, size, distance, flags);
|
|
}
|
|
|
|
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
|
|
int64_t wanted_timestamp, int flags)
|
|
{
|
|
int a, b, m;
|
|
int64_t timestamp;
|
|
|
|
a = - 1;
|
|
b = nb_entries;
|
|
|
|
//optimize appending index entries at the end
|
|
if(b && entries[b-1].timestamp < wanted_timestamp)
|
|
a= b-1;
|
|
|
|
while (b - a > 1) {
|
|
m = (a + b) >> 1;
|
|
timestamp = entries[m].timestamp;
|
|
if(timestamp >= wanted_timestamp)
|
|
b = m;
|
|
if(timestamp <= wanted_timestamp)
|
|
a = m;
|
|
}
|
|
m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
|
|
|
|
if(!(flags & AVSEEK_FLAG_ANY)){
|
|
while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
|
|
m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
|
|
}
|
|
}
|
|
|
|
if(m == nb_entries)
|
|
return -1;
|
|
return m;
|
|
}
|
|
|
|
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
|
|
int flags)
|
|
{
|
|
return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
|
|
wanted_timestamp, flags);
|
|
}
|
|
|
|
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
|
|
AVInputFormat *avif= s->iformat;
|
|
int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
|
|
int64_t ts_min, ts_max, ts;
|
|
int index;
|
|
int64_t ret;
|
|
AVStream *st;
|
|
|
|
if (stream_index < 0)
|
|
return -1;
|
|
|
|
av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
|
|
|
|
ts_max=
|
|
ts_min= AV_NOPTS_VALUE;
|
|
pos_limit= -1; //gcc falsely says it may be uninitialized
|
|
|
|
st= s->streams[stream_index];
|
|
if(st->index_entries){
|
|
AVIndexEntry *e;
|
|
|
|
index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp()
|
|
index= FFMAX(index, 0);
|
|
e= &st->index_entries[index];
|
|
|
|
if(e->timestamp <= target_ts || e->pos == e->min_distance){
|
|
pos_min= e->pos;
|
|
ts_min= e->timestamp;
|
|
av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
|
|
pos_min,ts_min);
|
|
}else{
|
|
assert(index==0);
|
|
}
|
|
|
|
index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
|
|
assert(index < st->nb_index_entries);
|
|
if(index >= 0){
|
|
e= &st->index_entries[index];
|
|
assert(e->timestamp >= target_ts);
|
|
pos_max= e->pos;
|
|
ts_max= e->timestamp;
|
|
pos_limit= pos_max - e->min_distance;
|
|
av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
|
|
pos_max,pos_limit, ts_max);
|
|
}
|
|
}
|
|
|
|
pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
|
|
if(pos<0)
|
|
return -1;
|
|
|
|
/* do the seek */
|
|
if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
|
|
av_update_cur_dts(s, st, ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){
|
|
int64_t pos, ts;
|
|
int64_t start_pos, filesize;
|
|
int no_change;
|
|
|
|
av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
|
|
|
|
if(ts_min == AV_NOPTS_VALUE){
|
|
pos_min = s->data_offset;
|
|
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
|
|
if (ts_min == AV_NOPTS_VALUE)
|
|
return -1;
|
|
}
|
|
|
|
if(ts_max == AV_NOPTS_VALUE){
|
|
int step= 1024;
|
|
filesize = avio_size(s->pb);
|
|
pos_max = filesize - 1;
|
|
do{
|
|
pos_max -= step;
|
|
ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
|
|
step += step;
|
|
}while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
|
|
if (ts_max == AV_NOPTS_VALUE)
|
|
return -1;
|
|
|
|
for(;;){
|
|
int64_t tmp_pos= pos_max + 1;
|
|
int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
|
|
if(tmp_ts == AV_NOPTS_VALUE)
|
|
break;
|
|
ts_max= tmp_ts;
|
|
pos_max= tmp_pos;
|
|
if(tmp_pos >= filesize)
|
|
break;
|
|
}
|
|
pos_limit= pos_max;
|
|
}
|
|
|
|
if(ts_min > ts_max){
|
|
return -1;
|
|
}else if(ts_min == ts_max){
|
|
pos_limit= pos_min;
|
|
}
|
|
|
|
no_change=0;
|
|
while (pos_min < pos_limit) {
|
|
av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
|
|
pos_min, pos_max, ts_min, ts_max);
|
|
assert(pos_limit <= pos_max);
|
|
|
|
if(no_change==0){
|
|
int64_t approximate_keyframe_distance= pos_max - pos_limit;
|
|
// interpolate position (better than dichotomy)
|
|
pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
|
|
+ pos_min - approximate_keyframe_distance;
|
|
}else if(no_change==1){
|
|
// bisection, if interpolation failed to change min or max pos last time
|
|
pos = (pos_min + pos_limit)>>1;
|
|
}else{
|
|
/* linear search if bisection failed, can only happen if there
|
|
are very few or no keyframes between min/max */
|
|
pos=pos_min;
|
|
}
|
|
if(pos <= pos_min)
|
|
pos= pos_min + 1;
|
|
else if(pos > pos_limit)
|
|
pos= pos_limit;
|
|
start_pos= pos;
|
|
|
|
ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
|
|
if(pos == pos_max)
|
|
no_change++;
|
|
else
|
|
no_change=0;
|
|
av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
|
|
pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
|
|
pos_limit, start_pos, no_change);
|
|
if(ts == AV_NOPTS_VALUE){
|
|
av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
|
|
return -1;
|
|
}
|
|
assert(ts != AV_NOPTS_VALUE);
|
|
if (target_ts <= ts) {
|
|
pos_limit = start_pos - 1;
|
|
pos_max = pos;
|
|
ts_max = ts;
|
|
}
|
|
if (target_ts >= ts) {
|
|
pos_min = pos;
|
|
ts_min = ts;
|
|
}
|
|
}
|
|
|
|
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
|
|
ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
|
|
pos_min = pos;
|
|
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
|
|
pos_min++;
|
|
ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
|
|
av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
|
|
pos, ts_min, target_ts, ts_max);
|
|
*ts_ret= ts;
|
|
return pos;
|
|
}
|
|
|
|
static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
|
|
int64_t pos_min, pos_max;
|
|
#if 0
|
|
AVStream *st;
|
|
|
|
if (stream_index < 0)
|
|
return -1;
|
|
|
|
st= s->streams[stream_index];
|
|
#endif
|
|
|
|
pos_min = s->data_offset;
|
|
pos_max = avio_size(s->pb) - 1;
|
|
|
|
if (pos < pos_min) pos= pos_min;
|
|
else if(pos > pos_max) pos= pos_max;
|
|
|
|
avio_seek(s->pb, pos, SEEK_SET);
|
|
|
|
#if 0
|
|
av_update_cur_dts(s, st, ts);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int seek_frame_generic(AVFormatContext *s,
|
|
int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
int index;
|
|
int64_t ret;
|
|
AVStream *st;
|
|
AVIndexEntry *ie;
|
|
|
|
st = s->streams[stream_index];
|
|
|
|
index = av_index_search_timestamp(st, timestamp, flags);
|
|
|
|
if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
|
|
return -1;
|
|
|
|
if(index < 0 || index==st->nb_index_entries-1){
|
|
AVPacket pkt;
|
|
int nonkey=0;
|
|
|
|
if(st->nb_index_entries){
|
|
assert(st->index_entries);
|
|
ie= &st->index_entries[st->nb_index_entries-1];
|
|
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
av_update_cur_dts(s, st, ie->timestamp);
|
|
}else{
|
|
if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
|
|
return ret;
|
|
}
|
|
for (;;) {
|
|
int read_status;
|
|
do{
|
|
read_status = av_read_frame(s, &pkt);
|
|
} while (read_status == AVERROR(EAGAIN));
|
|
if (read_status < 0)
|
|
break;
|
|
av_free_packet(&pkt);
|
|
if(stream_index == pkt.stream_index && pkt.dts > timestamp){
|
|
if(pkt.flags & AV_PKT_FLAG_KEY)
|
|
break;
|
|
if(nonkey++ > 1000){
|
|
av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
index = av_index_search_timestamp(st, timestamp, flags);
|
|
}
|
|
if (index < 0)
|
|
return -1;
|
|
|
|
ff_read_frame_flush(s);
|
|
AV_NOWARN_DEPRECATED(
|
|
if (s->iformat->read_seek){
|
|
if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
|
|
return 0;
|
|
}
|
|
)
|
|
ie = &st->index_entries[index];
|
|
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
av_update_cur_dts(s, st, ie->timestamp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
int ret;
|
|
AVStream *st;
|
|
|
|
ff_read_frame_flush(s);
|
|
|
|
if(flags & AVSEEK_FLAG_BYTE)
|
|
return seek_frame_byte(s, stream_index, timestamp, flags);
|
|
|
|
if(stream_index < 0){
|
|
stream_index= av_find_default_stream_index(s);
|
|
if(stream_index < 0)
|
|
return -1;
|
|
|
|
st= s->streams[stream_index];
|
|
/* timestamp for default must be expressed in AV_TIME_BASE units */
|
|
timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
|
|
}
|
|
|
|
/* first, we try the format specific seek */
|
|
AV_NOWARN_DEPRECATED(
|
|
if (s->iformat->read_seek)
|
|
ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
|
|
else
|
|
ret = -1;
|
|
)
|
|
if (ret >= 0) {
|
|
return 0;
|
|
}
|
|
|
|
if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH))
|
|
return av_seek_frame_binary(s, stream_index, timestamp, flags);
|
|
else if (!(s->iformat->flags & AVFMT_NOGENSEARCH))
|
|
return seek_frame_generic(s, stream_index, timestamp, flags);
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
|
|
{
|
|
if(min_ts > ts || max_ts < ts)
|
|
return -1;
|
|
|
|
ff_read_frame_flush(s);
|
|
|
|
if (s->iformat->read_seek2)
|
|
return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
|
|
|
|
if(s->iformat->read_timestamp){
|
|
//try to seek via read_timestamp()
|
|
}
|
|
|
|
//Fallback to old API if new is not implemented but old is
|
|
//Note the old has somewat different sematics
|
|
AV_NOWARN_DEPRECATED(
|
|
if(s->iformat->read_seek || 1)
|
|
return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
|
|
)
|
|
|
|
// try some generic seek like seek_frame_generic() but with new ts semantics
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
/**
|
|
* Return TRUE if the stream has accurate duration in any stream.
|
|
*
|
|
* @return TRUE if the stream has accurate duration for at least one component.
|
|
*/
|
|
static int has_duration(AVFormatContext *ic)
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
if(ic->duration != AV_NOPTS_VALUE)
|
|
return 1;
|
|
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->duration != AV_NOPTS_VALUE)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Estimate the stream timings from the one of each components.
|
|
*
|
|
* Also computes the global bitrate if possible.
|
|
*/
|
|
static void update_stream_timings(AVFormatContext *ic)
|
|
{
|
|
int64_t start_time, start_time1, start_time_text, end_time, end_time1;
|
|
int64_t duration, duration1;
|
|
int i;
|
|
AVStream *st;
|
|
|
|
start_time = INT64_MAX;
|
|
start_time_text = INT64_MAX;
|
|
end_time = INT64_MIN;
|
|
duration = INT64_MIN;
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
|
|
start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
|
|
if (start_time1 < start_time_text)
|
|
start_time_text = start_time1;
|
|
} else
|
|
if (start_time1 < start_time)
|
|
start_time = start_time1;
|
|
if (st->duration != AV_NOPTS_VALUE) {
|
|
end_time1 = start_time1
|
|
+ av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
|
|
if (end_time1 > end_time)
|
|
end_time = end_time1;
|
|
}
|
|
}
|
|
if (st->duration != AV_NOPTS_VALUE) {
|
|
duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
|
|
if (duration1 > duration)
|
|
duration = duration1;
|
|
}
|
|
}
|
|
if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
|
|
start_time = start_time_text;
|
|
if (start_time != INT64_MAX) {
|
|
ic->start_time = start_time;
|
|
if (end_time != INT64_MIN) {
|
|
if (end_time - start_time > duration)
|
|
duration = end_time - start_time;
|
|
}
|
|
}
|
|
if (duration != INT64_MIN && ic->duration == AV_NOPTS_VALUE) {
|
|
ic->duration = duration;
|
|
}
|
|
if (ic->file_size > 0 && ic->duration != AV_NOPTS_VALUE) {
|
|
/* compute the bitrate */
|
|
ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
|
|
(double)ic->duration;
|
|
}
|
|
}
|
|
|
|
static void fill_all_stream_timings(AVFormatContext *ic)
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
|
|
update_stream_timings(ic);
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time == AV_NOPTS_VALUE) {
|
|
if(ic->start_time != AV_NOPTS_VALUE)
|
|
st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
|
|
if(ic->duration != AV_NOPTS_VALUE)
|
|
st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void estimate_timings_from_bit_rate(AVFormatContext *ic)
|
|
{
|
|
int64_t filesize, duration;
|
|
int bit_rate, i;
|
|
AVStream *st;
|
|
|
|
/* if bit_rate is already set, we believe it */
|
|
if (ic->bit_rate <= 0) {
|
|
bit_rate = 0;
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (st->codec->bit_rate > 0)
|
|
bit_rate += st->codec->bit_rate;
|
|
}
|
|
ic->bit_rate = bit_rate;
|
|
}
|
|
|
|
/* if duration is already set, we believe it */
|
|
if (ic->duration == AV_NOPTS_VALUE &&
|
|
ic->bit_rate != 0 &&
|
|
ic->file_size != 0) {
|
|
filesize = ic->file_size;
|
|
if (filesize > 0) {
|
|
for(i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
|
|
if (st->duration == AV_NOPTS_VALUE)
|
|
st->duration = duration;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define DURATION_MAX_READ_SIZE 250000
|
|
#define DURATION_MAX_RETRY 3
|
|
|
|
/* only usable for MPEG-PS streams */
|
|
static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
|
|
{
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
AVStream *st;
|
|
int read_size, i, ret;
|
|
int64_t end_time;
|
|
int64_t filesize, offset, duration;
|
|
int retry=0;
|
|
|
|
ic->cur_st = NULL;
|
|
|
|
/* flush packet queue */
|
|
flush_packet_queue(ic);
|
|
|
|
for (i=0; i<ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
|
|
av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
|
|
|
|
if (st->parser) {
|
|
av_parser_close(st->parser);
|
|
st->parser= NULL;
|
|
av_free_packet(&st->cur_pkt);
|
|
}
|
|
}
|
|
|
|
/* estimate the end time (duration) */
|
|
/* XXX: may need to support wrapping */
|
|
filesize = ic->file_size;
|
|
end_time = AV_NOPTS_VALUE;
|
|
do{
|
|
offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
|
|
if (offset < 0)
|
|
offset = 0;
|
|
|
|
avio_seek(ic->pb, offset, SEEK_SET);
|
|
read_size = 0;
|
|
for(;;) {
|
|
if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
|
|
break;
|
|
|
|
do {
|
|
ret = av_read_packet(ic, pkt);
|
|
} while(ret == AVERROR(EAGAIN));
|
|
if (ret != 0)
|
|
break;
|
|
read_size += pkt->size;
|
|
st = ic->streams[pkt->stream_index];
|
|
if (pkt->pts != AV_NOPTS_VALUE &&
|
|
(st->start_time != AV_NOPTS_VALUE ||
|
|
st->first_dts != AV_NOPTS_VALUE)) {
|
|
duration = end_time = pkt->pts;
|
|
if (st->start_time != AV_NOPTS_VALUE)
|
|
duration -= st->start_time;
|
|
else
|
|
duration -= st->first_dts;
|
|
if (duration < 0)
|
|
duration += 1LL<<st->pts_wrap_bits;
|
|
if (duration > 0) {
|
|
if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
|
|
st->duration = duration;
|
|
}
|
|
}
|
|
av_free_packet(pkt);
|
|
}
|
|
}while( end_time==AV_NOPTS_VALUE
|
|
&& filesize > (DURATION_MAX_READ_SIZE<<retry)
|
|
&& ++retry <= DURATION_MAX_RETRY);
|
|
|
|
fill_all_stream_timings(ic);
|
|
|
|
avio_seek(ic->pb, old_offset, SEEK_SET);
|
|
for (i=0; i<ic->nb_streams; i++) {
|
|
st= ic->streams[i];
|
|
st->cur_dts= st->first_dts;
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
st->reference_dts = AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
|
|
static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
|
|
{
|
|
int64_t file_size;
|
|
|
|
/* get the file size, if possible */
|
|
if (ic->iformat->flags & AVFMT_NOFILE) {
|
|
file_size = 0;
|
|
} else {
|
|
file_size = avio_size(ic->pb);
|
|
if (file_size < 0)
|
|
file_size = 0;
|
|
}
|
|
ic->file_size = file_size;
|
|
|
|
if ((!strcmp(ic->iformat->name, "mpeg") ||
|
|
!strcmp(ic->iformat->name, "mpegts")) &&
|
|
file_size && ic->pb->seekable) {
|
|
/* get accurate estimate from the PTSes */
|
|
estimate_timings_from_pts(ic, old_offset);
|
|
} else if (has_duration(ic)) {
|
|
/* at least one component has timings - we use them for all
|
|
the components */
|
|
fill_all_stream_timings(ic);
|
|
} else {
|
|
av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
|
|
/* less precise: use bitrate info */
|
|
estimate_timings_from_bit_rate(ic);
|
|
}
|
|
update_stream_timings(ic);
|
|
|
|
{
|
|
int i;
|
|
AVStream av_unused *st;
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
|
|
(double) st->start_time / AV_TIME_BASE,
|
|
(double) st->duration / AV_TIME_BASE);
|
|
}
|
|
av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
|
|
(double) ic->start_time / AV_TIME_BASE,
|
|
(double) ic->duration / AV_TIME_BASE,
|
|
ic->bit_rate / 1000);
|
|
}
|
|
}
|
|
|
|
static int has_codec_parameters(AVCodecContext *avctx)
|
|
{
|
|
int val;
|
|
switch (avctx->codec_type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
|
|
if (!avctx->frame_size &&
|
|
(avctx->codec_id == CODEC_ID_VORBIS ||
|
|
avctx->codec_id == CODEC_ID_AAC ||
|
|
avctx->codec_id == CODEC_ID_MP1 ||
|
|
avctx->codec_id == CODEC_ID_MP2 ||
|
|
avctx->codec_id == CODEC_ID_MP3 ||
|
|
avctx->codec_id == CODEC_ID_SPEEX ||
|
|
avctx->codec_id == CODEC_ID_CELT))
|
|
return 0;
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
|
|
break;
|
|
case AVMEDIA_TYPE_DATA:
|
|
if(avctx->codec_id == CODEC_ID_NONE) return 1;
|
|
default:
|
|
val = 1;
|
|
break;
|
|
}
|
|
return avctx->codec_id != CODEC_ID_NONE && val != 0;
|
|
}
|
|
|
|
static int has_decode_delay_been_guessed(AVStream *st)
|
|
{
|
|
return st->codec->codec_id != CODEC_ID_H264 ||
|
|
st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
|
|
}
|
|
|
|
static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
|
|
{
|
|
int16_t *samples;
|
|
AVCodec *codec;
|
|
int got_picture, data_size, ret=0;
|
|
AVFrame picture;
|
|
|
|
if(!st->codec->codec){
|
|
codec = avcodec_find_decoder(st->codec->codec_id);
|
|
if (!codec)
|
|
return -1;
|
|
ret = avcodec_open2(st->codec, codec, options);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st) ||
|
|
(!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF)) {
|
|
switch(st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
avcodec_get_frame_defaults(&picture);
|
|
ret = avcodec_decode_video2(st->codec, &picture,
|
|
&got_picture, avpkt);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
|
|
samples = av_malloc(data_size);
|
|
if (!samples)
|
|
goto fail;
|
|
ret = avcodec_decode_audio3(st->codec, samples,
|
|
&data_size, avpkt);
|
|
av_free(samples);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
|
|
{
|
|
while (tags->id != CODEC_ID_NONE) {
|
|
if (tags->id == id)
|
|
return tags->tag;
|
|
tags++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
|
|
{
|
|
int i;
|
|
for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
|
|
if(tag == tags[i].tag)
|
|
return tags[i].id;
|
|
}
|
|
for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
|
|
if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
|
|
return tags[i].id;
|
|
}
|
|
return CODEC_ID_NONE;
|
|
}
|
|
|
|
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
|
|
{
|
|
int i;
|
|
for(i=0; tags && tags[i]; i++){
|
|
int tag= ff_codec_get_tag(tags[i], id);
|
|
if(tag) return tag;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
|
|
{
|
|
int i;
|
|
for(i=0; tags && tags[i]; i++){
|
|
enum CodecID id= ff_codec_get_id(tags[i], tag);
|
|
if(id!=CODEC_ID_NONE) return id;
|
|
}
|
|
return CODEC_ID_NONE;
|
|
}
|
|
|
|
static void compute_chapters_end(AVFormatContext *s)
|
|
{
|
|
unsigned int i, j;
|
|
int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
|
|
|
|
for (i = 0; i < s->nb_chapters; i++)
|
|
if (s->chapters[i]->end == AV_NOPTS_VALUE) {
|
|
AVChapter *ch = s->chapters[i];
|
|
int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
|
|
: INT64_MAX;
|
|
|
|
for (j = 0; j < s->nb_chapters; j++) {
|
|
AVChapter *ch1 = s->chapters[j];
|
|
int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
|
|
if (j != i && next_start > ch->start && next_start < end)
|
|
end = next_start;
|
|
}
|
|
ch->end = (end == INT64_MAX) ? ch->start : end;
|
|
}
|
|
}
|
|
|
|
static int get_std_framerate(int i){
|
|
if(i<60*12) return i*1001;
|
|
else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
|
|
}
|
|
|
|
/*
|
|
* Is the time base unreliable.
|
|
* This is a heuristic to balance between quick acceptance of the values in
|
|
* the headers vs. some extra checks.
|
|
* Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
|
|
* MPEG-2 commonly misuses field repeat flags to store different framerates.
|
|
* And there are "variable" fps files this needs to detect as well.
|
|
*/
|
|
static int tb_unreliable(AVCodecContext *c){
|
|
if( c->time_base.den >= 101L*c->time_base.num
|
|
|| c->time_base.den < 5L*c->time_base.num
|
|
/* || c->codec_tag == AV_RL32("DIVX")
|
|
|| c->codec_tag == AV_RL32("XVID")*/
|
|
|| c->codec_id == CODEC_ID_MPEG2VIDEO
|
|
|| c->codec_id == CODEC_ID_H264
|
|
)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
#if FF_API_FORMAT_PARAMETERS
|
|
int av_find_stream_info(AVFormatContext *ic)
|
|
{
|
|
return avformat_find_stream_info(ic, NULL);
|
|
}
|
|
#endif
|
|
|
|
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
|
|
{
|
|
int i, count, ret, read_size, j;
|
|
AVStream *st;
|
|
AVPacket pkt1, *pkt;
|
|
int64_t old_offset = avio_tell(ic->pb);
|
|
int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
|
|
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
AVCodec *codec;
|
|
st = ic->streams[i];
|
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
|
|
st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
|
|
/* if(!st->time_base.num)
|
|
st->time_base= */
|
|
if(!st->codec->time_base.num)
|
|
st->codec->time_base= st->time_base;
|
|
}
|
|
//only for the split stuff
|
|
if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
|
|
st->parser = av_parser_init(st->codec->codec_id);
|
|
if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
|
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
|
|
}
|
|
}
|
|
assert(!st->codec->codec);
|
|
codec = avcodec_find_decoder(st->codec->codec_id);
|
|
|
|
/* Ensure that subtitle_header is properly set. */
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
|
|
&& codec && !st->codec->codec)
|
|
avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
|
|
|
|
//try to just open decoders, in case this is enough to get parameters
|
|
if(!has_codec_parameters(st->codec)){
|
|
if (codec && !st->codec->codec){
|
|
AVDictionary *tmp = NULL;
|
|
if (options){
|
|
av_dict_copy(&tmp, options[i], 0);
|
|
av_dict_set(&tmp, "threads", 0, 0);
|
|
}
|
|
avcodec_open2(st->codec, codec, options ? &tmp : NULL);
|
|
av_dict_free(&tmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i=0; i<ic->nb_streams; i++) {
|
|
ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
|
|
}
|
|
|
|
count = 0;
|
|
read_size = 0;
|
|
for(;;) {
|
|
if(url_interrupt_cb()){
|
|
ret= AVERROR_EXIT;
|
|
av_log(ic, AV_LOG_DEBUG, "interrupted\n");
|
|
break;
|
|
}
|
|
|
|
/* check if one codec still needs to be handled */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
int fps_analyze_framecount = 20;
|
|
|
|
st = ic->streams[i];
|
|
if (!has_codec_parameters(st->codec))
|
|
break;
|
|
/* if the timebase is coarse (like the usual millisecond precision
|
|
of mkv), we need to analyze more frames to reliably arrive at
|
|
the correct fps */
|
|
if (av_q2d(st->time_base) > 0.0005)
|
|
fps_analyze_framecount *= 2;
|
|
if (ic->fps_probe_size >= 0)
|
|
fps_analyze_framecount = ic->fps_probe_size;
|
|
/* variable fps and no guess at the real fps */
|
|
if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
|
|
&& st->info->duration_count < fps_analyze_framecount
|
|
&& st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
|
|
break;
|
|
if(st->parser && st->parser->parser->split && !st->codec->extradata)
|
|
break;
|
|
if(st->first_dts == AV_NOPTS_VALUE && (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
|
|
break;
|
|
}
|
|
if (i == ic->nb_streams) {
|
|
/* NOTE: if the format has no header, then we need to read
|
|
some packets to get most of the streams, so we cannot
|
|
stop here */
|
|
if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
|
|
/* if we found the info for all the codecs, we can stop */
|
|
ret = count;
|
|
av_log(ic, AV_LOG_DEBUG, "All info found\n");
|
|
break;
|
|
}
|
|
}
|
|
/* we did not get all the codec info, but we read too much data */
|
|
if (read_size >= ic->probesize) {
|
|
ret = count;
|
|
av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
|
|
break;
|
|
}
|
|
|
|
/* NOTE: a new stream can be added there if no header in file
|
|
(AVFMTCTX_NOHEADER) */
|
|
ret = read_frame_internal(ic, &pkt1);
|
|
if (ret == AVERROR(EAGAIN))
|
|
continue;
|
|
|
|
if (ret < 0) {
|
|
/* EOF or error */
|
|
ret = -1; /* we could not have all the codec parameters before EOF */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (!has_codec_parameters(st->codec)){
|
|
char buf[256];
|
|
avcodec_string(buf, sizeof(buf), st->codec, 0);
|
|
av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
|
|
if ((ret = av_dup_packet(pkt)) < 0)
|
|
goto find_stream_info_err;
|
|
|
|
read_size += pkt->size;
|
|
|
|
st = ic->streams[pkt->stream_index];
|
|
if (st->codec_info_nb_frames>1) {
|
|
int64_t t;
|
|
if (st->time_base.den > 0 && (t=av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q)) >= ic->max_analyze_duration) {
|
|
av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
|
|
break;
|
|
}
|
|
st->info->codec_info_duration += pkt->duration;
|
|
}
|
|
{
|
|
int64_t last = st->info->last_dts;
|
|
int64_t duration= pkt->dts - last;
|
|
|
|
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
|
|
double dts= pkt->dts * av_q2d(st->time_base);
|
|
|
|
// if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
|
|
// av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
|
|
for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
|
|
int framerate= get_std_framerate(i);
|
|
double sdts= dts*framerate/(1001*12);
|
|
for(j=0; j<2; j++){
|
|
int ticks= lrintf(sdts+j*0.5);
|
|
double error= sdts - ticks + j*0.5;
|
|
st->info->duration_error[j][0][i] += error;
|
|
st->info->duration_error[j][1][i] += error*error;
|
|
}
|
|
}
|
|
st->info->duration_count++;
|
|
// ignore the first 4 values, they might have some random jitter
|
|
if (st->info->duration_count > 3)
|
|
st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
|
|
}
|
|
if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
|
|
st->info->last_dts = pkt->dts;
|
|
}
|
|
if(st->parser && st->parser->parser->split && !st->codec->extradata){
|
|
int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
|
|
if(i){
|
|
st->codec->extradata_size= i;
|
|
st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
|
|
memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
}
|
|
}
|
|
|
|
/* if still no information, we try to open the codec and to
|
|
decompress the frame. We try to avoid that in most cases as
|
|
it takes longer and uses more memory. For MPEG-4, we need to
|
|
decompress for QuickTime.
|
|
|
|
If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
|
|
least one frame of codec data, this makes sure the codec initializes
|
|
the channel configuration and does not only trust the values from the container.
|
|
*/
|
|
try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i] : NULL);
|
|
|
|
st->codec_info_nb_frames++;
|
|
count++;
|
|
}
|
|
|
|
// close codecs which were opened in try_decode_frame()
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if(st->codec->codec)
|
|
avcodec_close(st->codec);
|
|
}
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
|
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
|
|
(st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
|
|
st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
|
|
uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
|
|
if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
|
|
st->codec->codec_tag= tag;
|
|
}
|
|
|
|
// the check for tb_unreliable() is not completely correct, since this is not about handling
|
|
// a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
|
|
// ipmovie.c produces.
|
|
if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
|
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX);
|
|
if (st->info->duration_count && !st->r_frame_rate.num
|
|
&& tb_unreliable(st->codec) /*&&
|
|
//FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
|
|
st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
|
|
int num = 0;
|
|
double best_error= 0.01;
|
|
|
|
for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
|
|
int k;
|
|
|
|
if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
|
|
continue;
|
|
for(k=0; k<2; k++){
|
|
int n= st->info->duration_count;
|
|
double a= st->info->duration_error[k][0][j] / n;
|
|
double error= st->info->duration_error[k][1][j]/n - a*a;
|
|
|
|
if(error < best_error && best_error> 0.000000001){
|
|
best_error= error;
|
|
num = get_std_framerate(j);
|
|
}
|
|
if(error < 0.02)
|
|
av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
|
|
}
|
|
}
|
|
// do not increase frame rate by more than 1 % in order to match a standard rate.
|
|
if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
|
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
|
|
}
|
|
|
|
if (!st->r_frame_rate.num){
|
|
if( st->codec->time_base.den * (int64_t)st->time_base.num
|
|
<= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
|
|
st->r_frame_rate.num = st->codec->time_base.den;
|
|
st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
|
|
}else{
|
|
st->r_frame_rate.num = st->time_base.den;
|
|
st->r_frame_rate.den = st->time_base.num;
|
|
}
|
|
}
|
|
}else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
if(!st->codec->bits_per_coded_sample)
|
|
st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
|
|
// set stream disposition based on audio service type
|
|
switch (st->codec->audio_service_type) {
|
|
case AV_AUDIO_SERVICE_TYPE_EFFECTS:
|
|
st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
|
|
case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
|
|
st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
|
|
case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
|
|
st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
|
|
case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
|
|
st->disposition = AV_DISPOSITION_COMMENT; break;
|
|
case AV_AUDIO_SERVICE_TYPE_KARAOKE:
|
|
st->disposition = AV_DISPOSITION_KARAOKE; break;
|
|
}
|
|
}
|
|
}
|
|
|
|
estimate_timings(ic, old_offset);
|
|
|
|
compute_chapters_end(ic);
|
|
|
|
#if 0
|
|
/* correct DTS for B-frame streams with no timestamps */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
if(b-frames){
|
|
ppktl = &ic->packet_buffer;
|
|
while(ppkt1){
|
|
if(ppkt1->stream_index != i)
|
|
continue;
|
|
if(ppkt1->pkt->dts < 0)
|
|
break;
|
|
if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
|
|
break;
|
|
ppkt1->pkt->dts -= delta;
|
|
ppkt1= ppkt1->next;
|
|
}
|
|
if(ppkt1)
|
|
continue;
|
|
st->cur_dts -= delta;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
find_stream_info_err:
|
|
for (i=0; i < ic->nb_streams; i++)
|
|
av_freep(&ic->streams[i]->info);
|
|
return ret;
|
|
}
|
|
|
|
AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < ic->nb_programs; i++) {
|
|
if (ic->programs[i] == last) {
|
|
last = NULL;
|
|
} else {
|
|
if (!last)
|
|
for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
|
|
if (ic->programs[i]->stream_index[j] == s)
|
|
return ic->programs[i];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int av_find_best_stream(AVFormatContext *ic,
|
|
enum AVMediaType type,
|
|
int wanted_stream_nb,
|
|
int related_stream,
|
|
AVCodec **decoder_ret,
|
|
int flags)
|
|
{
|
|
int i, nb_streams = ic->nb_streams;
|
|
int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
|
|
unsigned *program = NULL;
|
|
AVCodec *decoder = NULL, *best_decoder = NULL;
|
|
|
|
if (related_stream >= 0 && wanted_stream_nb < 0) {
|
|
AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
|
|
if (p) {
|
|
program = p->stream_index;
|
|
nb_streams = p->nb_stream_indexes;
|
|
}
|
|
}
|
|
for (i = 0; i < nb_streams; i++) {
|
|
int real_stream_index = program ? program[i] : i;
|
|
AVStream *st = ic->streams[real_stream_index];
|
|
AVCodecContext *avctx = st->codec;
|
|
if (avctx->codec_type != type)
|
|
continue;
|
|
if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
|
|
continue;
|
|
if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
|
|
continue;
|
|
if (decoder_ret) {
|
|
decoder = avcodec_find_decoder(st->codec->codec_id);
|
|
if (!decoder) {
|
|
if (ret < 0)
|
|
ret = AVERROR_DECODER_NOT_FOUND;
|
|
continue;
|
|
}
|
|
}
|
|
if (best_count >= st->codec_info_nb_frames)
|
|
continue;
|
|
best_count = st->codec_info_nb_frames;
|
|
ret = real_stream_index;
|
|
best_decoder = decoder;
|
|
if (program && i == nb_streams - 1 && ret < 0) {
|
|
program = NULL;
|
|
nb_streams = ic->nb_streams;
|
|
i = 0; /* no related stream found, try again with everything */
|
|
}
|
|
}
|
|
if (decoder_ret)
|
|
*decoder_ret = best_decoder;
|
|
return ret;
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
int av_read_play(AVFormatContext *s)
|
|
{
|
|
if (s->iformat->read_play)
|
|
return s->iformat->read_play(s);
|
|
if (s->pb)
|
|
return avio_pause(s->pb, 0);
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
int av_read_pause(AVFormatContext *s)
|
|
{
|
|
if (s->iformat->read_pause)
|
|
return s->iformat->read_pause(s);
|
|
if (s->pb)
|
|
return avio_pause(s->pb, 1);
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
void av_close_input_stream(AVFormatContext *s)
|
|
{
|
|
flush_packet_queue(s);
|
|
if (s->iformat->read_close)
|
|
s->iformat->read_close(s);
|
|
avformat_free_context(s);
|
|
}
|
|
|
|
void avformat_free_context(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
|
|
av_opt_free(s);
|
|
if (s->iformat && s->iformat->priv_class && s->priv_data)
|
|
av_opt_free(s->priv_data);
|
|
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
/* free all data in a stream component */
|
|
st = s->streams[i];
|
|
if (st->parser) {
|
|
av_parser_close(st->parser);
|
|
av_free_packet(&st->cur_pkt);
|
|
}
|
|
av_dict_free(&st->metadata);
|
|
av_freep(&st->index_entries);
|
|
av_freep(&st->codec->extradata);
|
|
av_freep(&st->codec->subtitle_header);
|
|
av_freep(&st->codec);
|
|
av_freep(&st->priv_data);
|
|
av_freep(&st->info);
|
|
av_freep(&st);
|
|
}
|
|
for(i=s->nb_programs-1; i>=0; i--) {
|
|
av_dict_free(&s->programs[i]->metadata);
|
|
av_freep(&s->programs[i]->stream_index);
|
|
av_freep(&s->programs[i]);
|
|
}
|
|
av_freep(&s->programs);
|
|
av_freep(&s->priv_data);
|
|
while(s->nb_chapters--) {
|
|
av_dict_free(&s->chapters[s->nb_chapters]->metadata);
|
|
av_freep(&s->chapters[s->nb_chapters]);
|
|
}
|
|
av_freep(&s->chapters);
|
|
av_dict_free(&s->metadata);
|
|
av_freep(&s->streams);
|
|
av_free(s);
|
|
}
|
|
|
|
void av_close_input_file(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
|
|
NULL : s->pb;
|
|
av_close_input_stream(s);
|
|
if (pb)
|
|
avio_close(pb);
|
|
}
|
|
|
|
AVStream *av_new_stream(AVFormatContext *s, int id)
|
|
{
|
|
AVStream *st;
|
|
int i;
|
|
AVStream **streams;
|
|
|
|
if (s->nb_streams >= INT_MAX/sizeof(*streams))
|
|
return NULL;
|
|
streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
|
|
if (!streams)
|
|
return NULL;
|
|
s->streams = streams;
|
|
|
|
st = av_mallocz(sizeof(AVStream));
|
|
if (!st)
|
|
return NULL;
|
|
if (!(st->info = av_mallocz(sizeof(*st->info)))) {
|
|
av_free(st);
|
|
return NULL;
|
|
}
|
|
|
|
st->codec = avcodec_alloc_context3(NULL);
|
|
if (s->iformat) {
|
|
/* no default bitrate if decoding */
|
|
st->codec->bit_rate = 0;
|
|
}
|
|
st->index = s->nb_streams;
|
|
st->id = id;
|
|
st->start_time = AV_NOPTS_VALUE;
|
|
st->duration = AV_NOPTS_VALUE;
|
|
/* we set the current DTS to 0 so that formats without any timestamps
|
|
but durations get some timestamps, formats with some unknown
|
|
timestamps have their first few packets buffered and the
|
|
timestamps corrected before they are returned to the user */
|
|
st->cur_dts = 0;
|
|
st->first_dts = AV_NOPTS_VALUE;
|
|
st->probe_packets = MAX_PROBE_PACKETS;
|
|
|
|
/* default pts setting is MPEG-like */
|
|
av_set_pts_info(st, 33, 1, 90000);
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
for(i=0; i<MAX_REORDER_DELAY+1; i++)
|
|
st->pts_buffer[i]= AV_NOPTS_VALUE;
|
|
st->reference_dts = AV_NOPTS_VALUE;
|
|
|
|
st->sample_aspect_ratio = (AVRational){0,1};
|
|
|
|
s->streams[s->nb_streams++] = st;
|
|
return st;
|
|
}
|
|
|
|
AVProgram *av_new_program(AVFormatContext *ac, int id)
|
|
{
|
|
AVProgram *program=NULL;
|
|
int i;
|
|
|
|
av_dlog(ac, "new_program: id=0x%04x\n", id);
|
|
|
|
for(i=0; i<ac->nb_programs; i++)
|
|
if(ac->programs[i]->id == id)
|
|
program = ac->programs[i];
|
|
|
|
if(!program){
|
|
program = av_mallocz(sizeof(AVProgram));
|
|
if (!program)
|
|
return NULL;
|
|
dynarray_add(&ac->programs, &ac->nb_programs, program);
|
|
program->discard = AVDISCARD_NONE;
|
|
}
|
|
program->id = id;
|
|
|
|
return program;
|
|
}
|
|
|
|
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
|
|
{
|
|
AVChapter *chapter = NULL;
|
|
int i;
|
|
|
|
for(i=0; i<s->nb_chapters; i++)
|
|
if(s->chapters[i]->id == id)
|
|
chapter = s->chapters[i];
|
|
|
|
if(!chapter){
|
|
chapter= av_mallocz(sizeof(AVChapter));
|
|
if(!chapter)
|
|
return NULL;
|
|
dynarray_add(&s->chapters, &s->nb_chapters, chapter);
|
|
}
|
|
av_dict_set(&chapter->metadata, "title", title, 0);
|
|
chapter->id = id;
|
|
chapter->time_base= time_base;
|
|
chapter->start = start;
|
|
chapter->end = end;
|
|
|
|
return chapter;
|
|
}
|
|
|
|
/************************************************************/
|
|
/* output media file */
|
|
|
|
#if FF_API_FORMAT_PARAMETERS
|
|
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
if (s->oformat->priv_data_size > 0) {
|
|
s->priv_data = av_mallocz(s->oformat->priv_data_size);
|
|
if (!s->priv_data)
|
|
return AVERROR(ENOMEM);
|
|
if (s->oformat->priv_class) {
|
|
*(const AVClass**)s->priv_data= s->oformat->priv_class;
|
|
av_opt_set_defaults(s->priv_data);
|
|
}
|
|
} else
|
|
s->priv_data = NULL;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
|
|
const char *format, const char *filename)
|
|
{
|
|
AVFormatContext *s = avformat_alloc_context();
|
|
int ret = 0;
|
|
|
|
*avctx = NULL;
|
|
if (!s)
|
|
goto nomem;
|
|
|
|
if (!oformat) {
|
|
if (format) {
|
|
oformat = av_guess_format(format, NULL, NULL);
|
|
if (!oformat) {
|
|
av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
|
|
ret = AVERROR(EINVAL);
|
|
goto error;
|
|
}
|
|
} else {
|
|
oformat = av_guess_format(NULL, filename, NULL);
|
|
if (!oformat) {
|
|
ret = AVERROR(EINVAL);
|
|
av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
|
|
filename);
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
s->oformat = oformat;
|
|
if (s->oformat->priv_data_size > 0) {
|
|
s->priv_data = av_mallocz(s->oformat->priv_data_size);
|
|
if (!s->priv_data)
|
|
goto nomem;
|
|
if (s->oformat->priv_class) {
|
|
*(const AVClass**)s->priv_data= s->oformat->priv_class;
|
|
av_opt_set_defaults(s->priv_data);
|
|
}
|
|
} else
|
|
s->priv_data = NULL;
|
|
|
|
if (filename)
|
|
av_strlcpy(s->filename, filename, sizeof(s->filename));
|
|
*avctx = s;
|
|
return 0;
|
|
nomem:
|
|
av_log(s, AV_LOG_ERROR, "Out of memory\n");
|
|
ret = AVERROR(ENOMEM);
|
|
error:
|
|
avformat_free_context(s);
|
|
return ret;
|
|
}
|
|
|
|
#if FF_API_ALLOC_OUTPUT_CONTEXT
|
|
AVFormatContext *avformat_alloc_output_context(const char *format,
|
|
AVOutputFormat *oformat, const char *filename)
|
|
{
|
|
AVFormatContext *avctx;
|
|
int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
|
|
return ret < 0 ? NULL : avctx;
|
|
}
|
|
#endif
|
|
|
|
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
|
|
{
|
|
const AVCodecTag *avctag;
|
|
int n;
|
|
enum CodecID id = CODEC_ID_NONE;
|
|
unsigned int tag = 0;
|
|
|
|
/**
|
|
* Check that tag + id is in the table
|
|
* If neither is in the table -> OK
|
|
* If tag is in the table with another id -> FAIL
|
|
* If id is in the table with another tag -> FAIL unless strict < normal
|
|
*/
|
|
for (n = 0; s->oformat->codec_tag[n]; n++) {
|
|
avctag = s->oformat->codec_tag[n];
|
|
while (avctag->id != CODEC_ID_NONE) {
|
|
if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
|
|
id = avctag->id;
|
|
if (id == st->codec->codec_id)
|
|
return 1;
|
|
}
|
|
if (avctag->id == st->codec->codec_id)
|
|
tag = avctag->tag;
|
|
avctag++;
|
|
}
|
|
}
|
|
if (id != CODEC_ID_NONE)
|
|
return 0;
|
|
if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
#if FF_API_FORMAT_PARAMETERS
|
|
int av_write_header(AVFormatContext *s)
|
|
{
|
|
return avformat_write_header(s, NULL);
|
|
}
|
|
#endif
|
|
|
|
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
|
|
{
|
|
int ret = 0, i;
|
|
AVStream *st;
|
|
AVDictionary *tmp = NULL;
|
|
|
|
if (options)
|
|
av_dict_copy(&tmp, *options, 0);
|
|
if ((ret = av_opt_set_dict(s, &tmp)) < 0)
|
|
goto fail;
|
|
if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
|
|
(ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
|
|
goto fail;
|
|
|
|
// some sanity checks
|
|
if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
|
|
av_log(s, AV_LOG_ERROR, "no streams\n");
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
st = s->streams[i];
|
|
|
|
switch (st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
if(st->codec->sample_rate<=0){
|
|
av_log(s, AV_LOG_ERROR, "sample rate not set\n");
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
if(!st->codec->block_align)
|
|
st->codec->block_align = st->codec->channels *
|
|
av_get_bits_per_sample(st->codec->codec_id) >> 3;
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
|
|
av_log(s, AV_LOG_ERROR, "time base not set\n");
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
|
|
av_log(s, AV_LOG_ERROR, "dimensions not set\n");
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)
|
|
&& FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
|
|
){
|
|
av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if(s->oformat->codec_tag){
|
|
if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){
|
|
//the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
|
|
st->codec->codec_tag= 0;
|
|
}
|
|
if(st->codec->codec_tag){
|
|
if (!validate_codec_tag(s, st)) {
|
|
char tagbuf[32];
|
|
av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Tag %s/0x%08x incompatible with output codec id '%d'\n",
|
|
tagbuf, st->codec->codec_tag, st->codec->codec_id);
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
}else
|
|
st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
|
|
}
|
|
|
|
if(s->oformat->flags & AVFMT_GLOBALHEADER &&
|
|
!(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
|
|
av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
|
|
}
|
|
|
|
if (!s->priv_data && s->oformat->priv_data_size > 0) {
|
|
s->priv_data = av_mallocz(s->oformat->priv_data_size);
|
|
if (!s->priv_data) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
if (s->oformat->priv_class) {
|
|
*(const AVClass**)s->priv_data= s->oformat->priv_class;
|
|
av_opt_set_defaults(s->priv_data);
|
|
if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* set muxer identification string */
|
|
if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
|
|
av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
|
|
}
|
|
|
|
if(s->oformat->write_header){
|
|
ret = s->oformat->write_header(s);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
/* init PTS generation */
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
int64_t den = AV_NOPTS_VALUE;
|
|
st = s->streams[i];
|
|
|
|
switch (st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
den = (int64_t)st->time_base.num * st->codec->sample_rate;
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
den = (int64_t)st->time_base.num * st->codec->time_base.den;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (den != AV_NOPTS_VALUE) {
|
|
if (den <= 0) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
frac_init(&st->pts, 0, 0, den);
|
|
}
|
|
}
|
|
|
|
if (options) {
|
|
av_dict_free(options);
|
|
*options = tmp;
|
|
}
|
|
return 0;
|
|
fail:
|
|
av_dict_free(&tmp);
|
|
return ret;
|
|
}
|
|
|
|
//FIXME merge with compute_pkt_fields
|
|
static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
|
|
int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
|
|
int num, den, frame_size, i;
|
|
|
|
av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
|
|
pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
|
|
|
|
/* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
|
|
return AVERROR(EINVAL);*/
|
|
|
|
/* duration field */
|
|
if (pkt->duration == 0) {
|
|
compute_frame_duration(&num, &den, st, NULL, pkt);
|
|
if (den && num) {
|
|
pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
|
|
}
|
|
}
|
|
|
|
if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
|
|
pkt->pts= pkt->dts;
|
|
|
|
//XXX/FIXME this is a temporary hack until all encoders output pts
|
|
if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
|
|
pkt->dts=
|
|
// pkt->pts= st->cur_dts;
|
|
pkt->pts= st->pts.val;
|
|
}
|
|
|
|
//calculate dts from pts
|
|
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
|
|
st->pts_buffer[0]= pkt->pts;
|
|
for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
|
|
st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
|
|
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
|
|
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
|
|
|
|
pkt->dts= st->pts_buffer[0];
|
|
}
|
|
|
|
if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)){
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
|
|
st->index, st->cur_dts, pkt->dts);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
|
|
av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
// av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
|
|
st->cur_dts= pkt->dts;
|
|
st->pts.val= pkt->dts;
|
|
|
|
/* update pts */
|
|
switch (st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
frame_size = get_audio_frame_size(st->codec, pkt->size);
|
|
|
|
/* HACK/FIXME, we skip the initial 0 size packets as they are most
|
|
likely equal to the encoder delay, but it would be better if we
|
|
had the real timestamps from the encoder */
|
|
if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
|
|
frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
|
|
}
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
|
|
|
|
if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
|
return ret;
|
|
|
|
ret= s->oformat->write_packet(s, pkt);
|
|
|
|
if (ret >= 0)
|
|
s->streams[pkt->stream_index]->nb_frames++;
|
|
return ret;
|
|
}
|
|
|
|
void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
|
|
int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
|
|
{
|
|
AVPacketList **next_point, *this_pktl;
|
|
|
|
this_pktl = av_mallocz(sizeof(AVPacketList));
|
|
this_pktl->pkt= *pkt;
|
|
pkt->destruct= NULL; // do not free original but only the copy
|
|
av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
|
|
|
|
if(s->streams[pkt->stream_index]->last_in_packet_buffer){
|
|
next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
|
|
}else
|
|
next_point = &s->packet_buffer;
|
|
|
|
if(*next_point){
|
|
if(compare(s, &s->packet_buffer_end->pkt, pkt)){
|
|
while(!compare(s, &(*next_point)->pkt, pkt)){
|
|
next_point= &(*next_point)->next;
|
|
}
|
|
goto next_non_null;
|
|
}else{
|
|
next_point = &(s->packet_buffer_end->next);
|
|
}
|
|
}
|
|
assert(!*next_point);
|
|
|
|
s->packet_buffer_end= this_pktl;
|
|
next_non_null:
|
|
|
|
this_pktl->next= *next_point;
|
|
|
|
s->streams[pkt->stream_index]->last_in_packet_buffer=
|
|
*next_point= this_pktl;
|
|
}
|
|
|
|
static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
|
|
{
|
|
AVStream *st = s->streams[ pkt ->stream_index];
|
|
AVStream *st2= s->streams[ next->stream_index];
|
|
int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
|
|
st->time_base);
|
|
|
|
if (comp == 0)
|
|
return pkt->stream_index < next->stream_index;
|
|
return comp > 0;
|
|
}
|
|
|
|
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
|
|
AVPacketList *pktl;
|
|
int stream_count=0, noninterleaved_count=0;
|
|
int64_t delta_dts_max = 0;
|
|
int i;
|
|
|
|
if(pkt){
|
|
ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
|
|
}
|
|
|
|
for(i=0; i < s->nb_streams; i++) {
|
|
if (s->streams[i]->last_in_packet_buffer) {
|
|
++stream_count;
|
|
} else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
|
|
++noninterleaved_count;
|
|
}
|
|
}
|
|
|
|
if (s->nb_streams == stream_count) {
|
|
flush = 1;
|
|
} else if (!flush){
|
|
for(i=0; i < s->nb_streams; i++) {
|
|
if (s->streams[i]->last_in_packet_buffer) {
|
|
int64_t delta_dts =
|
|
av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
|
|
s->streams[i]->time_base,
|
|
AV_TIME_BASE_Q) -
|
|
av_rescale_q(s->packet_buffer->pkt.dts,
|
|
s->streams[s->packet_buffer->pkt.stream_index]->time_base,
|
|
AV_TIME_BASE_Q);
|
|
delta_dts_max= FFMAX(delta_dts_max, delta_dts);
|
|
}
|
|
}
|
|
if(s->nb_streams == stream_count+noninterleaved_count &&
|
|
delta_dts_max > 20*AV_TIME_BASE) {
|
|
av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
|
|
flush = 1;
|
|
}
|
|
}
|
|
if(stream_count && flush){
|
|
pktl= s->packet_buffer;
|
|
*out= pktl->pkt;
|
|
|
|
s->packet_buffer= pktl->next;
|
|
if(!s->packet_buffer)
|
|
s->packet_buffer_end= NULL;
|
|
|
|
if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
|
|
s->streams[out->stream_index]->last_in_packet_buffer= NULL;
|
|
av_freep(&pktl);
|
|
return 1;
|
|
}else{
|
|
av_init_packet(out);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Interleave an AVPacket correctly so it can be muxed.
|
|
* @param out the interleaved packet will be output here
|
|
* @param in the input packet
|
|
* @param flush 1 if no further packets are available as input and all
|
|
* remaining packets should be output
|
|
* @return 1 if a packet was output, 0 if no packet could be output,
|
|
* < 0 if an error occurred
|
|
*/
|
|
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
|
|
if(s->oformat->interleave_packet)
|
|
return s->oformat->interleave_packet(s, out, in, flush);
|
|
else
|
|
return av_interleave_packet_per_dts(s, out, in, flush);
|
|
}
|
|
|
|
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
|
|
AVStream *st= s->streams[ pkt->stream_index];
|
|
int ret;
|
|
|
|
//FIXME/XXX/HACK drop zero sized packets
|
|
if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
|
|
return 0;
|
|
|
|
av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
|
|
pkt->size, pkt->dts, pkt->pts);
|
|
if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
|
return ret;
|
|
|
|
if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
|
return AVERROR(EINVAL);
|
|
|
|
for(;;){
|
|
AVPacket opkt;
|
|
int ret= interleave_packet(s, &opkt, pkt, 0);
|
|
if(ret<=0) //FIXME cleanup needed for ret<0 ?
|
|
return ret;
|
|
|
|
ret= s->oformat->write_packet(s, &opkt);
|
|
if (ret >= 0)
|
|
s->streams[opkt.stream_index]->nb_frames++;
|
|
|
|
av_free_packet(&opkt);
|
|
pkt= NULL;
|
|
|
|
if(ret<0)
|
|
return ret;
|
|
if(s->pb && s->pb->error)
|
|
return s->pb->error;
|
|
}
|
|
}
|
|
|
|
int av_write_trailer(AVFormatContext *s)
|
|
{
|
|
int ret, i;
|
|
|
|
for(;;){
|
|
AVPacket pkt;
|
|
ret= interleave_packet(s, &pkt, NULL, 1);
|
|
if(ret<0) //FIXME cleanup needed for ret<0 ?
|
|
goto fail;
|
|
if(!ret)
|
|
break;
|
|
|
|
ret= s->oformat->write_packet(s, &pkt);
|
|
if (ret >= 0)
|
|
s->streams[pkt.stream_index]->nb_frames++;
|
|
|
|
av_free_packet(&pkt);
|
|
|
|
if(ret<0)
|
|
goto fail;
|
|
if(s->pb && s->pb->error)
|
|
goto fail;
|
|
}
|
|
|
|
if(s->oformat->write_trailer)
|
|
ret = s->oformat->write_trailer(s);
|
|
fail:
|
|
if(ret == 0)
|
|
ret = s->pb ? s->pb->error : 0;
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
av_freep(&s->streams[i]->priv_data);
|
|
av_freep(&s->streams[i]->index_entries);
|
|
}
|
|
if (s->iformat && s->iformat->priv_class)
|
|
av_opt_free(s->priv_data);
|
|
av_freep(&s->priv_data);
|
|
return ret;
|
|
}
|
|
|
|
int av_get_output_timestamp(struct AVFormatContext *s, int stream,
|
|
int64_t *dts, int64_t *wall)
|
|
{
|
|
if (!s->oformat || !s->oformat->get_output_timestamp)
|
|
return AVERROR(ENOSYS);
|
|
s->oformat->get_output_timestamp(s, stream, dts, wall);
|
|
return 0;
|
|
}
|
|
|
|
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
|
|
{
|
|
int i, j;
|
|
AVProgram *program=NULL;
|
|
void *tmp;
|
|
|
|
if (idx >= ac->nb_streams) {
|
|
av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
|
|
return;
|
|
}
|
|
|
|
for(i=0; i<ac->nb_programs; i++){
|
|
if(ac->programs[i]->id != progid)
|
|
continue;
|
|
program = ac->programs[i];
|
|
for(j=0; j<program->nb_stream_indexes; j++)
|
|
if(program->stream_index[j] == idx)
|
|
return;
|
|
|
|
tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
|
|
if(!tmp)
|
|
return;
|
|
program->stream_index = tmp;
|
|
program->stream_index[program->nb_stream_indexes++] = idx;
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void print_fps(double d, const char *postfix){
|
|
uint64_t v= lrintf(d*100);
|
|
if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
|
|
else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
|
|
else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
|
|
}
|
|
|
|
static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
|
|
{
|
|
if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
|
|
AVDictionaryEntry *tag=NULL;
|
|
|
|
av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
|
|
while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
|
|
if(strcmp("language", tag->key)){
|
|
char tmp[256];
|
|
int i;
|
|
av_strlcpy(tmp, tag->value, sizeof(tmp));
|
|
for(i=0; i<strlen(tmp); i++) if(tmp[i]==0xd) tmp[i]=' ';
|
|
av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tmp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* "user interface" functions */
|
|
static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
|
|
{
|
|
char buf[256];
|
|
int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
|
|
AVStream *st = ic->streams[i];
|
|
int g = av_gcd(st->time_base.num, st->time_base.den);
|
|
AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
|
|
avcodec_string(buf, sizeof(buf), st->codec, is_output);
|
|
av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
|
|
/* the pid is an important information, so we display it */
|
|
/* XXX: add a generic system */
|
|
if (flags & AVFMT_SHOW_IDS)
|
|
av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
|
|
if (lang)
|
|
av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
|
|
av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
|
|
av_log(NULL, AV_LOG_INFO, ": %s", buf);
|
|
if (st->sample_aspect_ratio.num && // default
|
|
av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
|
|
AVRational display_aspect_ratio;
|
|
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
|
|
st->codec->width*st->sample_aspect_ratio.num,
|
|
st->codec->height*st->sample_aspect_ratio.den,
|
|
1024*1024);
|
|
av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
|
|
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
|
|
display_aspect_ratio.num, display_aspect_ratio.den);
|
|
}
|
|
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
|
|
if(st->avg_frame_rate.den && st->avg_frame_rate.num)
|
|
print_fps(av_q2d(st->avg_frame_rate), "fps");
|
|
if(st->r_frame_rate.den && st->r_frame_rate.num)
|
|
print_fps(av_q2d(st->r_frame_rate), "tbr");
|
|
if(st->time_base.den && st->time_base.num)
|
|
print_fps(1/av_q2d(st->time_base), "tbn");
|
|
if(st->codec->time_base.den && st->codec->time_base.num)
|
|
print_fps(1/av_q2d(st->codec->time_base), "tbc");
|
|
}
|
|
if (st->disposition & AV_DISPOSITION_DEFAULT)
|
|
av_log(NULL, AV_LOG_INFO, " (default)");
|
|
if (st->disposition & AV_DISPOSITION_DUB)
|
|
av_log(NULL, AV_LOG_INFO, " (dub)");
|
|
if (st->disposition & AV_DISPOSITION_ORIGINAL)
|
|
av_log(NULL, AV_LOG_INFO, " (original)");
|
|
if (st->disposition & AV_DISPOSITION_COMMENT)
|
|
av_log(NULL, AV_LOG_INFO, " (comment)");
|
|
if (st->disposition & AV_DISPOSITION_LYRICS)
|
|
av_log(NULL, AV_LOG_INFO, " (lyrics)");
|
|
if (st->disposition & AV_DISPOSITION_KARAOKE)
|
|
av_log(NULL, AV_LOG_INFO, " (karaoke)");
|
|
if (st->disposition & AV_DISPOSITION_FORCED)
|
|
av_log(NULL, AV_LOG_INFO, " (forced)");
|
|
if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
|
|
av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
|
|
if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
|
|
av_log(NULL, AV_LOG_INFO, " (visual impaired)");
|
|
if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
|
|
av_log(NULL, AV_LOG_INFO, " (clean effects)");
|
|
av_log(NULL, AV_LOG_INFO, "\n");
|
|
dump_metadata(NULL, st->metadata, " ");
|
|
}
|
|
|
|
#if FF_API_DUMP_FORMAT
|
|
void dump_format(AVFormatContext *ic,
|
|
int index,
|
|
const char *url,
|
|
int is_output)
|
|
{
|
|
av_dump_format(ic, index, url, is_output);
|
|
}
|
|
#endif
|
|
|
|
void av_dump_format(AVFormatContext *ic,
|
|
int index,
|
|
const char *url,
|
|
int is_output)
|
|
{
|
|
int i;
|
|
uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
|
|
if (ic->nb_streams && !printed)
|
|
return;
|
|
|
|
av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
|
|
is_output ? "Output" : "Input",
|
|
index,
|
|
is_output ? ic->oformat->name : ic->iformat->name,
|
|
is_output ? "to" : "from", url);
|
|
dump_metadata(NULL, ic->metadata, " ");
|
|
if (!is_output) {
|
|
av_log(NULL, AV_LOG_INFO, " Duration: ");
|
|
if (ic->duration != AV_NOPTS_VALUE) {
|
|
int hours, mins, secs, us;
|
|
secs = ic->duration / AV_TIME_BASE;
|
|
us = ic->duration % AV_TIME_BASE;
|
|
mins = secs / 60;
|
|
secs %= 60;
|
|
hours = mins / 60;
|
|
mins %= 60;
|
|
av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
|
|
(100 * us) / AV_TIME_BASE);
|
|
} else {
|
|
av_log(NULL, AV_LOG_INFO, "N/A");
|
|
}
|
|
if (ic->start_time != AV_NOPTS_VALUE) {
|
|
int secs, us;
|
|
av_log(NULL, AV_LOG_INFO, ", start: ");
|
|
secs = ic->start_time / AV_TIME_BASE;
|
|
us = abs(ic->start_time % AV_TIME_BASE);
|
|
av_log(NULL, AV_LOG_INFO, "%d.%06d",
|
|
secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
|
|
}
|
|
av_log(NULL, AV_LOG_INFO, ", bitrate: ");
|
|
if (ic->bit_rate) {
|
|
av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
|
|
} else {
|
|
av_log(NULL, AV_LOG_INFO, "N/A");
|
|
}
|
|
av_log(NULL, AV_LOG_INFO, "\n");
|
|
}
|
|
for (i = 0; i < ic->nb_chapters; i++) {
|
|
AVChapter *ch = ic->chapters[i];
|
|
av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
|
|
av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
|
|
av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
|
|
|
|
dump_metadata(NULL, ch->metadata, " ");
|
|
}
|
|
if(ic->nb_programs) {
|
|
int j, k, total = 0;
|
|
for(j=0; j<ic->nb_programs; j++) {
|
|
AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
|
|
"name", NULL, 0);
|
|
av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
|
|
name ? name->value : "");
|
|
dump_metadata(NULL, ic->programs[j]->metadata, " ");
|
|
for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
|
|
dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
|
|
printed[ic->programs[j]->stream_index[k]] = 1;
|
|
}
|
|
total += ic->programs[j]->nb_stream_indexes;
|
|
}
|
|
if (total < ic->nb_streams)
|
|
av_log(NULL, AV_LOG_INFO, " No Program\n");
|
|
}
|
|
for(i=0;i<ic->nb_streams;i++)
|
|
if (!printed[i])
|
|
dump_stream_format(ic, i, index, is_output);
|
|
|
|
av_free(printed);
|
|
}
|
|
|
|
int64_t av_gettime(void)
|
|
{
|
|
struct timeval tv;
|
|
gettimeofday(&tv,NULL);
|
|
return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
|
|
}
|
|
|
|
uint64_t ff_ntp_time(void)
|
|
{
|
|
return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
|
|
}
|
|
|
|
#if FF_API_PARSE_DATE
|
|
#include "libavutil/parseutils.h"
|
|
|
|
int64_t parse_date(const char *timestr, int duration)
|
|
{
|
|
int64_t timeval;
|
|
av_parse_time(&timeval, timestr, duration);
|
|
return timeval;
|
|
}
|
|
#endif
|
|
|
|
#if FF_API_FIND_INFO_TAG
|
|
#include "libavutil/parseutils.h"
|
|
|
|
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
|
|
{
|
|
return av_find_info_tag(arg, arg_size, tag1, info);
|
|
}
|
|
#endif
|
|
|
|
int av_get_frame_filename(char *buf, int buf_size,
|
|
const char *path, int number)
|
|
{
|
|
const char *p;
|
|
char *q, buf1[20], c;
|
|
int nd, len, percentd_found;
|
|
|
|
q = buf;
|
|
p = path;
|
|
percentd_found = 0;
|
|
for(;;) {
|
|
c = *p++;
|
|
if (c == '\0')
|
|
break;
|
|
if (c == '%') {
|
|
do {
|
|
nd = 0;
|
|
while (isdigit(*p)) {
|
|
nd = nd * 10 + *p++ - '0';
|
|
}
|
|
c = *p++;
|
|
} while (isdigit(c));
|
|
|
|
switch(c) {
|
|
case '%':
|
|
goto addchar;
|
|
case 'd':
|
|
if (percentd_found)
|
|
goto fail;
|
|
percentd_found = 1;
|
|
snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
|
|
len = strlen(buf1);
|
|
if ((q - buf + len) > buf_size - 1)
|
|
goto fail;
|
|
memcpy(q, buf1, len);
|
|
q += len;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
} else {
|
|
addchar:
|
|
if ((q - buf) < buf_size - 1)
|
|
*q++ = c;
|
|
}
|
|
}
|
|
if (!percentd_found)
|
|
goto fail;
|
|
*q = '\0';
|
|
return 0;
|
|
fail:
|
|
*q = '\0';
|
|
return -1;
|
|
}
|
|
|
|
static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
|
|
{
|
|
int len, i, j, c;
|
|
#undef fprintf
|
|
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
|
|
|
|
for(i=0;i<size;i+=16) {
|
|
len = size - i;
|
|
if (len > 16)
|
|
len = 16;
|
|
PRINT("%08x ", i);
|
|
for(j=0;j<16;j++) {
|
|
if (j < len)
|
|
PRINT(" %02x", buf[i+j]);
|
|
else
|
|
PRINT(" ");
|
|
}
|
|
PRINT(" ");
|
|
for(j=0;j<len;j++) {
|
|
c = buf[i+j];
|
|
if (c < ' ' || c > '~')
|
|
c = '.';
|
|
PRINT("%c", c);
|
|
}
|
|
PRINT("\n");
|
|
}
|
|
#undef PRINT
|
|
}
|
|
|
|
void av_hex_dump(FILE *f, uint8_t *buf, int size)
|
|
{
|
|
hex_dump_internal(NULL, f, 0, buf, size);
|
|
}
|
|
|
|
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
|
|
{
|
|
hex_dump_internal(avcl, NULL, level, buf, size);
|
|
}
|
|
|
|
static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
|
|
{
|
|
#undef fprintf
|
|
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
|
|
PRINT("stream #%d:\n", pkt->stream_index);
|
|
PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
|
|
PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
|
|
/* DTS is _always_ valid after av_read_frame() */
|
|
PRINT(" dts=");
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
PRINT("N/A");
|
|
else
|
|
PRINT("%0.3f", pkt->dts * av_q2d(time_base));
|
|
/* PTS may not be known if B-frames are present. */
|
|
PRINT(" pts=");
|
|
if (pkt->pts == AV_NOPTS_VALUE)
|
|
PRINT("N/A");
|
|
else
|
|
PRINT("%0.3f", pkt->pts * av_q2d(time_base));
|
|
PRINT("\n");
|
|
PRINT(" size=%d\n", pkt->size);
|
|
#undef PRINT
|
|
if (dump_payload)
|
|
av_hex_dump(f, pkt->data, pkt->size);
|
|
}
|
|
|
|
#if FF_API_PKT_DUMP
|
|
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
|
|
{
|
|
AVRational tb = { 1, AV_TIME_BASE };
|
|
pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
|
|
}
|
|
#endif
|
|
|
|
void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
|
|
{
|
|
pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
|
|
}
|
|
|
|
#if FF_API_PKT_DUMP
|
|
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
|
|
{
|
|
AVRational tb = { 1, AV_TIME_BASE };
|
|
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
|
|
}
|
|
#endif
|
|
|
|
void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
|
|
AVStream *st)
|
|
{
|
|
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
|
|
}
|
|
|
|
void av_url_split(char *proto, int proto_size,
|
|
char *authorization, int authorization_size,
|
|
char *hostname, int hostname_size,
|
|
int *port_ptr,
|
|
char *path, int path_size,
|
|
const char *url)
|
|
{
|
|
const char *p, *ls, *at, *col, *brk;
|
|
|
|
if (port_ptr) *port_ptr = -1;
|
|
if (proto_size > 0) proto[0] = 0;
|
|
if (authorization_size > 0) authorization[0] = 0;
|
|
if (hostname_size > 0) hostname[0] = 0;
|
|
if (path_size > 0) path[0] = 0;
|
|
|
|
/* parse protocol */
|
|
if ((p = strchr(url, ':'))) {
|
|
av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
|
|
p++; /* skip ':' */
|
|
if (*p == '/') p++;
|
|
if (*p == '/') p++;
|
|
} else {
|
|
/* no protocol means plain filename */
|
|
av_strlcpy(path, url, path_size);
|
|
return;
|
|
}
|
|
|
|
/* separate path from hostname */
|
|
ls = strchr(p, '/');
|
|
if(!ls)
|
|
ls = strchr(p, '?');
|
|
if(ls)
|
|
av_strlcpy(path, ls, path_size);
|
|
else
|
|
ls = &p[strlen(p)]; // XXX
|
|
|
|
/* the rest is hostname, use that to parse auth/port */
|
|
if (ls != p) {
|
|
/* authorization (user[:pass]@hostname) */
|
|
if ((at = strchr(p, '@')) && at < ls) {
|
|
av_strlcpy(authorization, p,
|
|
FFMIN(authorization_size, at + 1 - p));
|
|
p = at + 1; /* skip '@' */
|
|
}
|
|
|
|
if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
|
|
/* [host]:port */
|
|
av_strlcpy(hostname, p + 1,
|
|
FFMIN(hostname_size, brk - p));
|
|
if (brk[1] == ':' && port_ptr)
|
|
*port_ptr = atoi(brk + 2);
|
|
} else if ((col = strchr(p, ':')) && col < ls) {
|
|
av_strlcpy(hostname, p,
|
|
FFMIN(col + 1 - p, hostname_size));
|
|
if (port_ptr) *port_ptr = atoi(col + 1);
|
|
} else
|
|
av_strlcpy(hostname, p,
|
|
FFMIN(ls + 1 - p, hostname_size));
|
|
}
|
|
}
|
|
|
|
char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
|
|
{
|
|
int i;
|
|
static const char hex_table_uc[16] = { '0', '1', '2', '3',
|
|
'4', '5', '6', '7',
|
|
'8', '9', 'A', 'B',
|
|
'C', 'D', 'E', 'F' };
|
|
static const char hex_table_lc[16] = { '0', '1', '2', '3',
|
|
'4', '5', '6', '7',
|
|
'8', '9', 'a', 'b',
|
|
'c', 'd', 'e', 'f' };
|
|
const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
|
|
|
|
for(i = 0; i < s; i++) {
|
|
buff[i * 2] = hex_table[src[i] >> 4];
|
|
buff[i * 2 + 1] = hex_table[src[i] & 0xF];
|
|
}
|
|
|
|
return buff;
|
|
}
|
|
|
|
int ff_hex_to_data(uint8_t *data, const char *p)
|
|
{
|
|
int c, len, v;
|
|
|
|
len = 0;
|
|
v = 1;
|
|
for (;;) {
|
|
p += strspn(p, SPACE_CHARS);
|
|
if (*p == '\0')
|
|
break;
|
|
c = toupper((unsigned char) *p++);
|
|
if (c >= '0' && c <= '9')
|
|
c = c - '0';
|
|
else if (c >= 'A' && c <= 'F')
|
|
c = c - 'A' + 10;
|
|
else
|
|
break;
|
|
v = (v << 4) | c;
|
|
if (v & 0x100) {
|
|
if (data)
|
|
data[len] = v;
|
|
len++;
|
|
v = 1;
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
|
|
unsigned int pts_num, unsigned int pts_den)
|
|
{
|
|
AVRational new_tb;
|
|
if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
|
|
if(new_tb.num != pts_num)
|
|
av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
|
|
}else
|
|
av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
|
|
|
|
if(new_tb.num <= 0 || new_tb.den <= 0) {
|
|
av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
|
|
return;
|
|
}
|
|
s->time_base = new_tb;
|
|
s->pts_wrap_bits = pts_wrap_bits;
|
|
}
|
|
|
|
int ff_url_join(char *str, int size, const char *proto,
|
|
const char *authorization, const char *hostname,
|
|
int port, const char *fmt, ...)
|
|
{
|
|
#if CONFIG_NETWORK
|
|
struct addrinfo hints, *ai;
|
|
#endif
|
|
|
|
str[0] = '\0';
|
|
if (proto)
|
|
av_strlcatf(str, size, "%s://", proto);
|
|
if (authorization && authorization[0])
|
|
av_strlcatf(str, size, "%s@", authorization);
|
|
#if CONFIG_NETWORK && defined(AF_INET6)
|
|
/* Determine if hostname is a numerical IPv6 address,
|
|
* properly escape it within [] in that case. */
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
|
|
if (ai->ai_family == AF_INET6) {
|
|
av_strlcat(str, "[", size);
|
|
av_strlcat(str, hostname, size);
|
|
av_strlcat(str, "]", size);
|
|
} else {
|
|
av_strlcat(str, hostname, size);
|
|
}
|
|
freeaddrinfo(ai);
|
|
} else
|
|
#endif
|
|
/* Not an IPv6 address, just output the plain string. */
|
|
av_strlcat(str, hostname, size);
|
|
|
|
if (port >= 0)
|
|
av_strlcatf(str, size, ":%d", port);
|
|
if (fmt) {
|
|
va_list vl;
|
|
int len = strlen(str);
|
|
|
|
va_start(vl, fmt);
|
|
vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
|
|
va_end(vl);
|
|
}
|
|
return strlen(str);
|
|
}
|
|
|
|
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
|
|
AVFormatContext *src)
|
|
{
|
|
AVPacket local_pkt;
|
|
|
|
local_pkt = *pkt;
|
|
local_pkt.stream_index = dst_stream;
|
|
if (pkt->pts != AV_NOPTS_VALUE)
|
|
local_pkt.pts = av_rescale_q(pkt->pts,
|
|
src->streams[pkt->stream_index]->time_base,
|
|
dst->streams[dst_stream]->time_base);
|
|
if (pkt->dts != AV_NOPTS_VALUE)
|
|
local_pkt.dts = av_rescale_q(pkt->dts,
|
|
src->streams[pkt->stream_index]->time_base,
|
|
dst->streams[dst_stream]->time_base);
|
|
return av_write_frame(dst, &local_pkt);
|
|
}
|
|
|
|
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
|
|
void *context)
|
|
{
|
|
const char *ptr = str;
|
|
|
|
/* Parse key=value pairs. */
|
|
for (;;) {
|
|
const char *key;
|
|
char *dest = NULL, *dest_end;
|
|
int key_len, dest_len = 0;
|
|
|
|
/* Skip whitespace and potential commas. */
|
|
while (*ptr && (isspace(*ptr) || *ptr == ','))
|
|
ptr++;
|
|
if (!*ptr)
|
|
break;
|
|
|
|
key = ptr;
|
|
|
|
if (!(ptr = strchr(key, '=')))
|
|
break;
|
|
ptr++;
|
|
key_len = ptr - key;
|
|
|
|
callback_get_buf(context, key, key_len, &dest, &dest_len);
|
|
dest_end = dest + dest_len - 1;
|
|
|
|
if (*ptr == '\"') {
|
|
ptr++;
|
|
while (*ptr && *ptr != '\"') {
|
|
if (*ptr == '\\') {
|
|
if (!ptr[1])
|
|
break;
|
|
if (dest && dest < dest_end)
|
|
*dest++ = ptr[1];
|
|
ptr += 2;
|
|
} else {
|
|
if (dest && dest < dest_end)
|
|
*dest++ = *ptr;
|
|
ptr++;
|
|
}
|
|
}
|
|
if (*ptr == '\"')
|
|
ptr++;
|
|
} else {
|
|
for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
|
|
if (dest && dest < dest_end)
|
|
*dest++ = *ptr;
|
|
}
|
|
if (dest)
|
|
*dest = 0;
|
|
}
|
|
}
|
|
|
|
int ff_find_stream_index(AVFormatContext *s, int id)
|
|
{
|
|
int i;
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
if (s->streams[i]->id == id)
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
void ff_make_absolute_url(char *buf, int size, const char *base,
|
|
const char *rel)
|
|
{
|
|
char *sep;
|
|
/* Absolute path, relative to the current server */
|
|
if (base && strstr(base, "://") && rel[0] == '/') {
|
|
if (base != buf)
|
|
av_strlcpy(buf, base, size);
|
|
sep = strstr(buf, "://");
|
|
if (sep) {
|
|
sep += 3;
|
|
sep = strchr(sep, '/');
|
|
if (sep)
|
|
*sep = '\0';
|
|
}
|
|
av_strlcat(buf, rel, size);
|
|
return;
|
|
}
|
|
/* If rel actually is an absolute url, just copy it */
|
|
if (!base || strstr(rel, "://") || rel[0] == '/') {
|
|
av_strlcpy(buf, rel, size);
|
|
return;
|
|
}
|
|
if (base != buf)
|
|
av_strlcpy(buf, base, size);
|
|
/* Remove the file name from the base url */
|
|
sep = strrchr(buf, '/');
|
|
if (sep)
|
|
sep[1] = '\0';
|
|
else
|
|
buf[0] = '\0';
|
|
while (av_strstart(rel, "../", NULL) && sep) {
|
|
/* Remove the path delimiter at the end */
|
|
sep[0] = '\0';
|
|
sep = strrchr(buf, '/');
|
|
/* If the next directory name to pop off is "..", break here */
|
|
if (!strcmp(sep ? &sep[1] : buf, "..")) {
|
|
/* Readd the slash we just removed */
|
|
av_strlcat(buf, "/", size);
|
|
break;
|
|
}
|
|
/* Cut off the directory name */
|
|
if (sep)
|
|
sep[1] = '\0';
|
|
else
|
|
buf[0] = '\0';
|
|
rel += 3;
|
|
}
|
|
av_strlcat(buf, rel, size);
|
|
}
|
|
|
|
int64_t ff_iso8601_to_unix_time(const char *datestr)
|
|
{
|
|
#if HAVE_STRPTIME
|
|
struct tm time = {0};
|
|
strptime(datestr, "%Y - %m - %dT%T", &time);
|
|
return mktime(&time);
|
|
#else
|
|
av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
|
|
"the date string.\n");
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
|
|
{
|
|
if (ofmt) {
|
|
if (ofmt->query_codec)
|
|
return ofmt->query_codec(codec_id, std_compliance);
|
|
else if (ofmt->codec_tag)
|
|
return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
|
|
else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
|
|
codec_id == ofmt->subtitle_codec)
|
|
return 1;
|
|
}
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|