3120 lines
93 KiB
C
3120 lines
93 KiB
C
/*
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* Various utilities for ffmpeg system
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "allformats.h"
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#include "opt.h"
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#undef NDEBUG
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#include <assert.h>
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/**
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* @file libavformat/utils.c
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* Various utility functions for using ffmpeg library.
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*/
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static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
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static void av_frac_add(AVFrac *f, int64_t incr);
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/** head of registered input format linked list. */
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AVInputFormat *first_iformat = NULL;
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/** head of registered output format linked list. */
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AVOutputFormat *first_oformat = NULL;
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void av_register_input_format(AVInputFormat *format)
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{
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AVInputFormat **p;
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p = &first_iformat;
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while (*p != NULL) p = &(*p)->next;
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*p = format;
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format->next = NULL;
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}
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void av_register_output_format(AVOutputFormat *format)
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{
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AVOutputFormat **p;
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p = &first_oformat;
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while (*p != NULL) p = &(*p)->next;
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*p = format;
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format->next = NULL;
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}
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int match_ext(const char *filename, const char *extensions)
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{
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const char *ext, *p;
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char ext1[32], *q;
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if(!filename)
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return 0;
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ext = strrchr(filename, '.');
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if (ext) {
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ext++;
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p = extensions;
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for(;;) {
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q = ext1;
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while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
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*q++ = *p++;
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*q = '\0';
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if (!strcasecmp(ext1, ext))
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return 1;
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if (*p == '\0')
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break;
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p++;
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}
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}
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return 0;
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}
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AVOutputFormat *guess_format(const char *short_name, const char *filename,
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const char *mime_type)
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{
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AVOutputFormat *fmt, *fmt_found;
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int score_max, score;
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/* specific test for image sequences */
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#ifdef CONFIG_IMAGE2_MUXER
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if (!short_name && filename &&
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av_filename_number_test(filename) &&
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av_guess_image2_codec(filename) != CODEC_ID_NONE) {
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return guess_format("image2", NULL, NULL);
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}
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#endif
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/* find the proper file type */
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fmt_found = NULL;
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score_max = 0;
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fmt = first_oformat;
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while (fmt != NULL) {
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score = 0;
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if (fmt->name && short_name && !strcmp(fmt->name, short_name))
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score += 100;
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if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
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score += 10;
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if (filename && fmt->extensions &&
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match_ext(filename, fmt->extensions)) {
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score += 5;
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}
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if (score > score_max) {
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score_max = score;
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fmt_found = fmt;
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}
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fmt = fmt->next;
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}
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return fmt_found;
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}
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AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
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const char *mime_type)
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{
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AVOutputFormat *fmt = guess_format(short_name, filename, mime_type);
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if (fmt) {
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AVOutputFormat *stream_fmt;
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char stream_format_name[64];
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snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
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stream_fmt = guess_format(stream_format_name, NULL, NULL);
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if (stream_fmt)
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fmt = stream_fmt;
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}
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return fmt;
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}
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/**
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* Guesses the codec id based upon muxer and filename.
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*/
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enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
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const char *filename, const char *mime_type, enum CodecType type){
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if(type == CODEC_TYPE_VIDEO){
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enum CodecID codec_id= CODEC_ID_NONE;
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#ifdef CONFIG_IMAGE2_MUXER
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if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
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codec_id= av_guess_image2_codec(filename);
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}
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#endif
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if(codec_id == CODEC_ID_NONE)
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codec_id= fmt->video_codec;
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return codec_id;
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}else if(type == CODEC_TYPE_AUDIO)
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return fmt->audio_codec;
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else
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return CODEC_ID_NONE;
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}
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/**
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* finds AVInputFormat based on input format's short name.
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*/
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AVInputFormat *av_find_input_format(const char *short_name)
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{
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AVInputFormat *fmt;
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for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
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if (!strcmp(fmt->name, short_name))
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return fmt;
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}
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return NULL;
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}
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/* memory handling */
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/**
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* Default packet destructor.
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*/
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void av_destruct_packet(AVPacket *pkt)
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{
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av_free(pkt->data);
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pkt->data = NULL; pkt->size = 0;
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}
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/**
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* Allocate the payload of a packet and intialized its fields to default values.
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*
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* @param pkt packet
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* @param size wanted payload size
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* @return 0 if OK. AVERROR_xxx otherwise.
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*/
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int av_new_packet(AVPacket *pkt, int size)
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{
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uint8_t *data;
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if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
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return AVERROR_NOMEM;
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data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!data)
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return AVERROR_NOMEM;
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memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
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av_init_packet(pkt);
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pkt->data = data;
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pkt->size = size;
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pkt->destruct = av_destruct_packet;
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return 0;
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}
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/**
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* Allocate and read the payload of a packet and intialized its fields to default values.
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*
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* @param pkt packet
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* @param size wanted payload size
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* @return >0 (read size) if OK. AVERROR_xxx otherwise.
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*/
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int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
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{
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int ret= av_new_packet(pkt, size);
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if(ret<0)
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return ret;
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pkt->pos= url_ftell(s);
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ret= get_buffer(s, pkt->data, size);
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if(ret<=0)
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av_free_packet(pkt);
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else
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pkt->size= ret;
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return ret;
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}
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/* This is a hack - the packet memory allocation stuff is broken. The
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packet is allocated if it was not really allocated */
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int av_dup_packet(AVPacket *pkt)
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{
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if (pkt->destruct != av_destruct_packet) {
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uint8_t *data;
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/* we duplicate the packet and don't forget to put the padding
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again */
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if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
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return AVERROR_NOMEM;
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data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!data) {
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return AVERROR_NOMEM;
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}
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memcpy(data, pkt->data, pkt->size);
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memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
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pkt->data = data;
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pkt->destruct = av_destruct_packet;
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}
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return 0;
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}
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/**
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* Check whether filename actually is a numbered sequence generator.
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*
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* @param filename possible numbered sequence string
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* @return 1 if a valid numbered sequence string, 0 otherwise.
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*/
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int av_filename_number_test(const char *filename)
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{
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char buf[1024];
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return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
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}
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/**
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* Guess file format.
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*
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* @param is_opened whether the file is already opened, determines whether
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* demuxers with or without AVFMT_NOFILE are probed
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*/
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AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
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{
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AVInputFormat *fmt1, *fmt;
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int score, score_max;
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fmt = NULL;
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score_max = 0;
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for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) {
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if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
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continue;
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score = 0;
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if (fmt1->read_probe) {
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score = fmt1->read_probe(pd);
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} else if (fmt1->extensions) {
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if (match_ext(pd->filename, fmt1->extensions)) {
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score = 50;
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}
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}
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if (score > score_max) {
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score_max = score;
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fmt = fmt1;
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}
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}
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return fmt;
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}
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/************************************************************/
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/* input media file */
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/**
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* Open a media file from an IO stream. 'fmt' must be specified.
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*/
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static const char* format_to_name(void* ptr)
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{
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AVFormatContext* fc = (AVFormatContext*) ptr;
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if(fc->iformat) return fc->iformat->name;
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else if(fc->oformat) return fc->oformat->name;
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else return "NULL";
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}
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#define OFFSET(x) offsetof(AVFormatContext,x)
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#define DEFAULT 0 //should be NAN but it doesnt work as its not a constant in glibc as required by ANSI/ISO C
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//these names are too long to be readable
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#define E AV_OPT_FLAG_ENCODING_PARAM
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#define D AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[]={
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{"probesize", NULL, OFFSET(probesize), FF_OPT_TYPE_INT, 32000, 32, INT_MAX, D}, /* 32000 from mpegts.c: 1.0 second at 24Mbit/s */
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{"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
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{"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
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{"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"},
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{"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"},
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{"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"},
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{"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
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{"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
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{"analyzeduration", NULL, OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, 3*AV_TIME_BASE, 0, INT_MAX, D},
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{NULL},
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};
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#undef E
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#undef D
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#undef DEFAULT
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static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options };
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static void avformat_get_context_defaults(AVFormatContext *s)
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{
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memset(s, 0, sizeof(AVFormatContext));
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s->av_class = &av_format_context_class;
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av_opt_set_defaults(s);
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}
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AVFormatContext *av_alloc_format_context(void)
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{
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AVFormatContext *ic;
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ic = av_malloc(sizeof(AVFormatContext));
|
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if (!ic) return ic;
|
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avformat_get_context_defaults(ic);
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ic->av_class = &av_format_context_class;
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return ic;
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}
|
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|
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/**
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|
* Allocates all the structures needed to read an input stream.
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* This does not open the needed codecs for decoding the stream[s].
|
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*/
|
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int av_open_input_stream(AVFormatContext **ic_ptr,
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ByteIOContext *pb, const char *filename,
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AVInputFormat *fmt, AVFormatParameters *ap)
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|
{
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int err;
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AVFormatContext *ic;
|
|
AVFormatParameters default_ap;
|
|
|
|
if(!ap){
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ap=&default_ap;
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memset(ap, 0, sizeof(default_ap));
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}
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|
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if(!ap->prealloced_context)
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ic = av_alloc_format_context();
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else
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ic = *ic_ptr;
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if (!ic) {
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err = AVERROR_NOMEM;
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|
goto fail;
|
|
}
|
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ic->iformat = fmt;
|
|
if (pb)
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|
ic->pb = *pb;
|
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ic->duration = AV_NOPTS_VALUE;
|
|
ic->start_time = AV_NOPTS_VALUE;
|
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pstrcpy(ic->filename, sizeof(ic->filename), filename);
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|
|
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/* allocate private data */
|
|
if (fmt->priv_data_size > 0) {
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ic->priv_data = av_mallocz(fmt->priv_data_size);
|
|
if (!ic->priv_data) {
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|
err = AVERROR_NOMEM;
|
|
goto fail;
|
|
}
|
|
} else {
|
|
ic->priv_data = NULL;
|
|
}
|
|
|
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err = ic->iformat->read_header(ic, ap);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
if (pb && !ic->data_offset)
|
|
ic->data_offset = url_ftell(&ic->pb);
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|
|
|
*ic_ptr = ic;
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|
return 0;
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|
fail:
|
|
if (ic) {
|
|
av_freep(&ic->priv_data);
|
|
}
|
|
av_free(ic);
|
|
*ic_ptr = NULL;
|
|
return err;
|
|
}
|
|
|
|
/** Size of probe buffer, for guessing file type from file contents. */
|
|
#define PROBE_BUF_MIN 2048
|
|
#define PROBE_BUF_MAX (1<<20)
|
|
|
|
/**
|
|
* Open a media file as input. The codec are not opened. Only the file
|
|
* header (if present) is read.
|
|
*
|
|
* @param ic_ptr the opened media file handle is put here
|
|
* @param filename filename to open.
|
|
* @param fmt if non NULL, force the file format to use
|
|
* @param buf_size optional buffer size (zero if default is OK)
|
|
* @param ap additionnal parameters needed when opening the file (NULL if default)
|
|
* @return 0 if OK. AVERROR_xxx otherwise.
|
|
*/
|
|
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
|
|
AVInputFormat *fmt,
|
|
int buf_size,
|
|
AVFormatParameters *ap)
|
|
{
|
|
int err, must_open_file, file_opened, probe_size;
|
|
AVProbeData probe_data, *pd = &probe_data;
|
|
ByteIOContext pb1, *pb = &pb1;
|
|
|
|
file_opened = 0;
|
|
pd->filename = "";
|
|
if (filename)
|
|
pd->filename = filename;
|
|
pd->buf = NULL;
|
|
pd->buf_size = 0;
|
|
|
|
if (!fmt) {
|
|
/* guess format if no file can be opened */
|
|
fmt = av_probe_input_format(pd, 0);
|
|
}
|
|
|
|
/* do not open file if the format does not need it. XXX: specific
|
|
hack needed to handle RTSP/TCP */
|
|
must_open_file = 1;
|
|
if (fmt && (fmt->flags & AVFMT_NOFILE)) {
|
|
must_open_file = 0;
|
|
pb= NULL; //FIXME this or memset(pb, 0, sizeof(ByteIOContext)); otherwise its uninitalized
|
|
}
|
|
|
|
if (!fmt || must_open_file) {
|
|
/* if no file needed do not try to open one */
|
|
if (url_fopen(pb, filename, URL_RDONLY) < 0) {
|
|
err = AVERROR_IO;
|
|
goto fail;
|
|
}
|
|
file_opened = 1;
|
|
if (buf_size > 0) {
|
|
url_setbufsize(pb, buf_size);
|
|
}
|
|
|
|
for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){
|
|
/* read probe data */
|
|
pd->buf= av_realloc(pd->buf, probe_size);
|
|
pd->buf_size = get_buffer(pb, pd->buf, probe_size);
|
|
if (url_fseek(pb, 0, SEEK_SET) == (offset_t)-EPIPE) {
|
|
url_fclose(pb);
|
|
if (url_fopen(pb, filename, URL_RDONLY) < 0) {
|
|
file_opened = 0;
|
|
err = AVERROR_IO;
|
|
goto fail;
|
|
}
|
|
}
|
|
/* guess file format */
|
|
fmt = av_probe_input_format(pd, 1);
|
|
}
|
|
av_freep(&pd->buf);
|
|
}
|
|
|
|
/* if still no format found, error */
|
|
if (!fmt) {
|
|
err = AVERROR_NOFMT;
|
|
goto fail;
|
|
}
|
|
|
|
/* XXX: suppress this hack for redirectors */
|
|
#ifdef CONFIG_NETWORK
|
|
if (fmt == &redir_demuxer) {
|
|
err = redir_open(ic_ptr, pb);
|
|
url_fclose(pb);
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
/* check filename in case of an image number is expected */
|
|
if (fmt->flags & AVFMT_NEEDNUMBER) {
|
|
if (!av_filename_number_test(filename)) {
|
|
err = AVERROR_NUMEXPECTED;
|
|
goto fail;
|
|
}
|
|
}
|
|
err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
|
|
if (err)
|
|
goto fail;
|
|
return 0;
|
|
fail:
|
|
av_freep(&pd->buf);
|
|
if (file_opened)
|
|
url_fclose(pb);
|
|
*ic_ptr = NULL;
|
|
return err;
|
|
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
/**
|
|
* Read a transport packet from a media file.
|
|
*
|
|
* This function is absolete and should never be used.
|
|
* Use av_read_frame() instead.
|
|
*
|
|
* @param s media file handle
|
|
* @param pkt is filled
|
|
* @return 0 if OK. AVERROR_xxx if error.
|
|
*/
|
|
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
return s->iformat->read_packet(s, pkt);
|
|
}
|
|
|
|
/**********************************************************/
|
|
|
|
/**
|
|
* Get the number of samples of an audio frame. Return (-1) if error.
|
|
*/
|
|
static int get_audio_frame_size(AVCodecContext *enc, int size)
|
|
{
|
|
int frame_size;
|
|
|
|
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 = (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 CODEC_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) {
|
|
*pden *= 2;
|
|
*pnum = (*pnum) * (2 + pc->repeat_pict);
|
|
}
|
|
}
|
|
break;
|
|
case CODEC_TYPE_AUDIO:
|
|
frame_size = get_audio_frame_size(st->codec, pkt->size);
|
|
if (frame_size < 0)
|
|
break;
|
|
*pnum = frame_size;
|
|
*pden = st->codec->sample_rate;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int is_intra_only(AVCodecContext *enc){
|
|
if(enc->codec_type == CODEC_TYPE_AUDIO){
|
|
return 1;
|
|
}else if(enc->codec_type == CODEC_TYPE_VIDEO){
|
|
switch(enc->codec_id){
|
|
case CODEC_ID_MJPEG:
|
|
case CODEC_ID_MJPEGB:
|
|
case CODEC_ID_LJPEG:
|
|
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:
|
|
return 1;
|
|
default: break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int64_t lsb2full(int64_t lsb, int64_t last_ts, int lsb_bits){
|
|
int64_t mask = lsb_bits < 64 ? (1LL<<lsb_bits)-1 : -1LL;
|
|
int64_t delta= last_ts - mask/2;
|
|
return ((lsb - delta)&mask) + delta;
|
|
}
|
|
|
|
static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
|
|
AVCodecParserContext *pc, AVPacket *pkt)
|
|
{
|
|
int num, den, presentation_delayed;
|
|
/* handle wrapping */
|
|
if(st->cur_dts != AV_NOPTS_VALUE){
|
|
if(pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->pts= lsb2full(pkt->pts, st->cur_dts, st->pts_wrap_bits);
|
|
if(pkt->dts != AV_NOPTS_VALUE)
|
|
pkt->dts= lsb2full(pkt->dts, st->cur_dts, st->pts_wrap_bits);
|
|
}
|
|
|
|
if (pkt->duration == 0) {
|
|
compute_frame_duration(&num, &den, st, pc, pkt);
|
|
if (den && num) {
|
|
pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
|
|
}
|
|
}
|
|
|
|
if(is_intra_only(st->codec))
|
|
pkt->flags |= PKT_FLAG_KEY;
|
|
|
|
/* do we have a video B frame ? */
|
|
presentation_delayed = 0;
|
|
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
|
/* XXX: need has_b_frame, but cannot get it if the codec is
|
|
not initialized */
|
|
if (( st->codec->codec_id == CODEC_ID_H264
|
|
|| st->codec->has_b_frames) &&
|
|
pc && pc->pict_type != FF_B_TYPE)
|
|
presentation_delayed = 1;
|
|
/* this may be redundant, but it shouldnt hurt */
|
|
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
|
|
presentation_delayed = 1;
|
|
}
|
|
|
|
if(st->cur_dts == AV_NOPTS_VALUE){
|
|
if(presentation_delayed) st->cur_dts = -pkt->duration;
|
|
else st->cur_dts = 0;
|
|
}
|
|
|
|
// 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 */
|
|
if (presentation_delayed) {
|
|
/* DTS = decompression time stamp */
|
|
/* PTS = presentation time stamp */
|
|
if (pkt->dts == AV_NOPTS_VALUE) {
|
|
/* if we know the last pts, use it */
|
|
if(st->last_IP_pts != AV_NOPTS_VALUE)
|
|
st->cur_dts = pkt->dts = st->last_IP_pts;
|
|
else
|
|
pkt->dts = st->cur_dts;
|
|
} else {
|
|
st->cur_dts = pkt->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->cur_dts += pkt->duration;
|
|
else
|
|
st->cur_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 futur */
|
|
} 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) {
|
|
if (pkt->dts == AV_NOPTS_VALUE) {
|
|
pkt->pts = st->cur_dts;
|
|
pkt->dts = st->cur_dts;
|
|
}
|
|
else {
|
|
st->cur_dts = pkt->dts;
|
|
pkt->pts = pkt->dts;
|
|
}
|
|
} else {
|
|
st->cur_dts = pkt->pts;
|
|
pkt->dts = pkt->pts;
|
|
}
|
|
st->cur_dts += pkt->duration;
|
|
}
|
|
// av_log(NULL, AV_LOG_DEBUG, "OUTdelayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts);
|
|
|
|
/* update flags */
|
|
if (pc) {
|
|
pkt->flags = 0;
|
|
/* key frame computation */
|
|
switch(st->codec->codec_type) {
|
|
case CODEC_TYPE_VIDEO:
|
|
if (pc->pict_type == FF_I_TYPE)
|
|
pkt->flags |= PKT_FLAG_KEY;
|
|
break;
|
|
case CODEC_TYPE_AUDIO:
|
|
pkt->flags |= PKT_FLAG_KEY;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void av_destruct_packet_nofree(AVPacket *pkt)
|
|
{
|
|
pkt->data = NULL; pkt->size = 0;
|
|
}
|
|
|
|
static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVStream *st;
|
|
int len, ret, i;
|
|
|
|
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 = s->cur_pkt;
|
|
compute_pkt_fields(s, st, NULL, pkt);
|
|
s->cur_st = NULL;
|
|
break;
|
|
} else if (s->cur_len > 0 && st->discard < AVDISCARD_ALL) {
|
|
len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size,
|
|
s->cur_ptr, s->cur_len,
|
|
s->cur_pkt.pts, s->cur_pkt.dts);
|
|
s->cur_pkt.pts = AV_NOPTS_VALUE;
|
|
s->cur_pkt.dts = AV_NOPTS_VALUE;
|
|
/* increment read pointer */
|
|
s->cur_ptr += len;
|
|
s->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->destruct = av_destruct_packet_nofree;
|
|
compute_pkt_fields(s, st, st->parser, pkt);
|
|
break;
|
|
}
|
|
} else {
|
|
/* free packet */
|
|
av_free_packet(&s->cur_pkt);
|
|
s->cur_st = NULL;
|
|
}
|
|
} else {
|
|
/* read next packet */
|
|
ret = av_read_packet(s, &s->cur_pkt);
|
|
if (ret < 0) {
|
|
if (ret == -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_parse(st->parser, st->codec,
|
|
&pkt->data, &pkt->size,
|
|
NULL, 0,
|
|
AV_NOPTS_VALUE, AV_NOPTS_VALUE);
|
|
if (pkt->size)
|
|
goto got_packet;
|
|
}
|
|
}
|
|
/* no more packets: really terminates parsing */
|
|
return ret;
|
|
}
|
|
|
|
st = s->streams[s->cur_pkt.stream_index];
|
|
if(st->codec->debug & FF_DEBUG_PTS)
|
|
av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
|
|
s->cur_pkt.stream_index,
|
|
s->cur_pkt.pts,
|
|
s->cur_pkt.dts,
|
|
s->cur_pkt.size);
|
|
|
|
s->cur_st = st;
|
|
s->cur_ptr = s->cur_pkt.data;
|
|
s->cur_len = s->cur_pkt.size;
|
|
if (st->need_parsing && !st->parser) {
|
|
st->parser = av_parser_init(st->codec->codec_id);
|
|
if (!st->parser) {
|
|
/* no parser available : just output the raw packets */
|
|
st->need_parsing = 0;
|
|
}else if(st->need_parsing == 2){
|
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(st->codec->debug & FF_DEBUG_PTS)
|
|
av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
|
|
pkt->stream_index,
|
|
pkt->pts,
|
|
pkt->dts,
|
|
pkt->size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Return the next frame of a stream.
|
|
*
|
|
* The returned packet is valid
|
|
* until the next av_read_frame() or until av_close_input_file() and
|
|
* must be freed with av_free_packet. For video, the packet contains
|
|
* exactly one frame. For audio, it contains an integer number of
|
|
* frames if each frame has a known fixed size (e.g. PCM or ADPCM
|
|
* data). If the audio frames have a variable size (e.g. MPEG audio),
|
|
* then it contains one frame.
|
|
*
|
|
* pkt->pts, pkt->dts and pkt->duration are always set to correct
|
|
* values in AV_TIME_BASE unit (and guessed if the format cannot
|
|
* provided them). pkt->pts can be AV_NOPTS_VALUE if the video format
|
|
* has B frames, so it is better to rely on pkt->dts if you do not
|
|
* decompress the payload.
|
|
*
|
|
* @return 0 if OK, < 0 if error or end of file.
|
|
*/
|
|
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){
|
|
while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
|
|
if( pktl->pkt.stream_index == next_pkt->stream_index
|
|
&& next_pkt->dts < pktl->pkt.dts
|
|
&& pktl->pkt.pts != pktl->pkt.dts //not b frame
|
|
/*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){
|
|
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){
|
|
AVPacketList **plast_pktl= &s->packet_buffer;
|
|
int ret= av_read_frame_internal(s, pkt);
|
|
if(ret<0){
|
|
if(pktl && ret != -EAGAIN){
|
|
eof=1;
|
|
continue;
|
|
}else
|
|
return ret;
|
|
}
|
|
|
|
/* duplicate the packet */
|
|
if (av_dup_packet(pkt) < 0)
|
|
return AVERROR_NOMEM;
|
|
|
|
while(*plast_pktl) plast_pktl= &(*plast_pktl)->next; //FIXME maybe maintain pointer to the last?
|
|
|
|
pktl = av_mallocz(sizeof(AVPacketList));
|
|
if (!pktl)
|
|
return AVERROR_NOMEM;
|
|
|
|
/* add the packet in the buffered packet list */
|
|
*plast_pktl = pktl;
|
|
pktl->pkt= *pkt;
|
|
}else{
|
|
assert(!s->packet_buffer);
|
|
return av_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);
|
|
}
|
|
}
|
|
|
|
/*******************************************************/
|
|
/* seek support */
|
|
|
|
int av_find_default_stream_index(AVFormatContext *s)
|
|
{
|
|
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 == CODEC_TYPE_VIDEO) {
|
|
return i;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Flush the frame reader.
|
|
*/
|
|
static void av_read_frame_flush(AVFormatContext *s)
|
|
{
|
|
AVStream *st;
|
|
int i;
|
|
|
|
flush_packet_queue(s);
|
|
|
|
/* free previous packet */
|
|
if (s->cur_st) {
|
|
if (s->cur_st->parser)
|
|
av_free_packet(&s->cur_pkt);
|
|
s->cur_st = NULL;
|
|
}
|
|
/* fail safe */
|
|
s->cur_ptr = NULL;
|
|
s->cur_len = 0;
|
|
|
|
/* 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;
|
|
}
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
st->cur_dts = 0; /* we set the current DTS to an unspecified origin */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Updates cur_dts of all streams based on given timestamp and AVStream.
|
|
*
|
|
* Stream ref_st unchanged, others set cur_dts in their native timebase
|
|
* only needed for timestamp wrapping or if (dts not set and pts!=dts)
|
|
* @param timestamp new dts expressed in time_base of param ref_st
|
|
* @param ref_st reference stream giving time_base of param timestamp
|
|
*/
|
|
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);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add a index entry into a sorted list updateing if it is already there.
|
|
*
|
|
* @param timestamp timestamp in the timebase of the given stream
|
|
*/
|
|
int av_add_index_entry(AVStream *st,
|
|
int64_t pos, int64_t timestamp, int size, int distance, int flags)
|
|
{
|
|
AVIndexEntry *entries, *ie;
|
|
int index;
|
|
|
|
if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
|
|
return -1;
|
|
|
|
entries = av_fast_realloc(st->index_entries,
|
|
&st->index_entries_allocated_size,
|
|
(st->nb_index_entries + 1) *
|
|
sizeof(AVIndexEntry));
|
|
if(!entries)
|
|
return -1;
|
|
|
|
st->index_entries= entries;
|
|
|
|
index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
|
|
|
|
if(index<0){
|
|
index= st->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)*(st->nb_index_entries - index));
|
|
st->nb_index_entries++;
|
|
}else if(ie->pos == pos && distance < ie->min_distance) //dont 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;
|
|
}
|
|
|
|
/**
|
|
* build an index for raw streams using a parser.
|
|
*/
|
|
static void av_build_index_raw(AVFormatContext *s)
|
|
{
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
int ret;
|
|
AVStream *st;
|
|
|
|
st = s->streams[0];
|
|
av_read_frame_flush(s);
|
|
url_fseek(&s->pb, s->data_offset, SEEK_SET);
|
|
|
|
for(;;) {
|
|
ret = av_read_frame(s, pkt);
|
|
if (ret < 0)
|
|
break;
|
|
if (pkt->stream_index == 0 && st->parser &&
|
|
(pkt->flags & PKT_FLAG_KEY)) {
|
|
av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
|
|
0, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
av_free_packet(pkt);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns TRUE if we deal with a raw stream.
|
|
*
|
|
* Raw codec data and parsing needed.
|
|
*/
|
|
static int is_raw_stream(AVFormatContext *s)
|
|
{
|
|
AVStream *st;
|
|
|
|
if (s->nb_streams != 1)
|
|
return 0;
|
|
st = s->streams[0];
|
|
if (!st->need_parsing)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Gets the index for a specific timestamp.
|
|
* @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond to
|
|
* the timestamp which is <= the requested one, if backward is 0
|
|
* then it will be >=
|
|
* if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
|
|
* @return < 0 if no such timestamp could be found
|
|
*/
|
|
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
|
|
int flags)
|
|
{
|
|
AVIndexEntry *entries= st->index_entries;
|
|
int nb_entries= st->nb_index_entries;
|
|
int a, b, m;
|
|
int64_t timestamp;
|
|
|
|
a = - 1;
|
|
b = nb_entries;
|
|
|
|
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;
|
|
}
|
|
|
|
#define DEBUG_SEEK
|
|
|
|
/**
|
|
* Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
|
|
* this isnt supposed to be called directly by a user application, but by demuxers
|
|
* @param target_ts target timestamp in the time base of the given stream
|
|
* @param stream_index stream number
|
|
*/
|
|
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
|
|
AVInputFormat *avif= s->iformat;
|
|
int64_t pos_min, pos_max, pos, pos_limit;
|
|
int64_t ts_min, ts_max, ts;
|
|
int index;
|
|
AVStream *st;
|
|
|
|
if (stream_index < 0)
|
|
return -1;
|
|
|
|
#ifdef DEBUG_SEEK
|
|
av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
|
|
#endif
|
|
|
|
ts_max=
|
|
ts_min= AV_NOPTS_VALUE;
|
|
pos_limit= -1; //gcc falsely says it may be uninitalized
|
|
|
|
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;
|
|
#ifdef DEBUG_SEEK
|
|
av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
|
|
pos_min,ts_min);
|
|
#endif
|
|
}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;
|
|
#ifdef DEBUG_SEEK
|
|
av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
|
|
pos_max,pos_limit, ts_max);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
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 */
|
|
url_fseek(&s->pb, pos, SEEK_SET);
|
|
|
|
av_update_cur_dts(s, st, ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Does a binary search using read_timestamp().
|
|
* this isnt supposed to be called directly by a user application, but by demuxers
|
|
* @param target_ts target timestamp in the time base of the given stream
|
|
* @param stream_index stream number
|
|
*/
|
|
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;
|
|
|
|
#ifdef DEBUG_SEEK
|
|
av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
|
|
#endif
|
|
|
|
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 = url_fsize(&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) {
|
|
#ifdef DEBUG_SEEK
|
|
av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
|
|
pos_min, pos_max,
|
|
ts_min, ts_max);
|
|
#endif
|
|
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 keframes 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;
|
|
#ifdef DEBUG_SEEK
|
|
av_log(s, AV_LOG_DEBUG, "%"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);
|
|
#endif
|
|
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;
|
|
#ifdef DEBUG_SEEK
|
|
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_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
|
|
pos, ts_min, target_ts, ts_max);
|
|
#endif
|
|
*ts_ret= ts;
|
|
return pos;
|
|
}
|
|
|
|
static int av_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 = url_fsize(&s->pb) - 1;
|
|
|
|
if (pos < pos_min) pos= pos_min;
|
|
else if(pos > pos_max) pos= pos_max;
|
|
|
|
url_fseek(&s->pb, pos, SEEK_SET);
|
|
|
|
#if 0
|
|
av_update_cur_dts(s, st, ts);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int av_seek_frame_generic(AVFormatContext *s,
|
|
int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
int index;
|
|
AVStream *st;
|
|
AVIndexEntry *ie;
|
|
|
|
if (!s->index_built) {
|
|
if (is_raw_stream(s)) {
|
|
av_build_index_raw(s);
|
|
} else {
|
|
return -1;
|
|
}
|
|
s->index_built = 1;
|
|
}
|
|
|
|
st = s->streams[stream_index];
|
|
index = av_index_search_timestamp(st, timestamp, flags);
|
|
if (index < 0)
|
|
return -1;
|
|
|
|
/* now we have found the index, we can seek */
|
|
ie = &st->index_entries[index];
|
|
av_read_frame_flush(s);
|
|
url_fseek(&s->pb, ie->pos, SEEK_SET);
|
|
|
|
av_update_cur_dts(s, st, ie->timestamp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Seek to the key frame at timestamp.
|
|
* 'timestamp' in 'stream_index'.
|
|
* @param stream_index If stream_index is (-1), a default
|
|
* stream is selected, and timestamp is automatically converted
|
|
* from AV_TIME_BASE units to the stream specific time_base.
|
|
* @param timestamp timestamp in AVStream.time_base units
|
|
* or if there is no stream specified then in AV_TIME_BASE units
|
|
* @param flags flags which select direction and seeking mode
|
|
* @return >= 0 on success
|
|
*/
|
|
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
int ret;
|
|
AVStream *st;
|
|
|
|
av_read_frame_flush(s);
|
|
|
|
if(flags & AVSEEK_FLAG_BYTE)
|
|
return av_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);
|
|
}
|
|
st= s->streams[stream_index];
|
|
|
|
/* first, we try the format specific seek */
|
|
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)
|
|
return av_seek_frame_binary(s, stream_index, timestamp, flags);
|
|
else
|
|
return av_seek_frame_generic(s, stream_index, timestamp, flags);
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
/**
|
|
* Returns TRUE if the stream has accurate timings in any stream.
|
|
*
|
|
* @return TRUE if the stream has accurate timings for at least one component.
|
|
*/
|
|
static int av_has_timings(AVFormatContext *ic)
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time != AV_NOPTS_VALUE &&
|
|
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 av_update_stream_timings(AVFormatContext *ic)
|
|
{
|
|
int64_t start_time, start_time1, end_time, end_time1;
|
|
int i;
|
|
AVStream *st;
|
|
|
|
start_time = INT64_MAX;
|
|
end_time = INT64_MIN;
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time != AV_NOPTS_VALUE) {
|
|
start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
|
|
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 (start_time != INT64_MAX) {
|
|
ic->start_time = start_time;
|
|
if (end_time != INT64_MIN) {
|
|
ic->duration = end_time - start_time;
|
|
if (ic->file_size > 0) {
|
|
/* compute the bit rate */
|
|
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;
|
|
|
|
av_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 av_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];
|
|
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->start_time == AV_NOPTS_VALUE ||
|
|
st->duration == AV_NOPTS_VALUE) {
|
|
st->start_time = 0;
|
|
st->duration = duration;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define DURATION_MAX_READ_SIZE 250000
|
|
|
|
/* only usable for MPEG-PS streams */
|
|
static void av_estimate_timings_from_pts(AVFormatContext *ic)
|
|
{
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
AVStream *st;
|
|
int read_size, i, ret;
|
|
int64_t end_time;
|
|
int64_t filesize, offset, duration;
|
|
|
|
/* free previous packet */
|
|
if (ic->cur_st && ic->cur_st->parser)
|
|
av_free_packet(&ic->cur_pkt);
|
|
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->parser) {
|
|
av_parser_close(st->parser);
|
|
st->parser= NULL;
|
|
}
|
|
}
|
|
|
|
/* we read the first packets to get the first PTS (not fully
|
|
accurate, but it is enough now) */
|
|
url_fseek(&ic->pb, 0, SEEK_SET);
|
|
read_size = 0;
|
|
for(;;) {
|
|
if (read_size >= DURATION_MAX_READ_SIZE)
|
|
break;
|
|
/* if all info is available, we can stop */
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time == AV_NOPTS_VALUE)
|
|
break;
|
|
}
|
|
if (i == ic->nb_streams)
|
|
break;
|
|
|
|
ret = av_read_packet(ic, pkt);
|
|
if (ret != 0)
|
|
break;
|
|
read_size += pkt->size;
|
|
st = ic->streams[pkt->stream_index];
|
|
if (pkt->pts != AV_NOPTS_VALUE) {
|
|
if (st->start_time == AV_NOPTS_VALUE)
|
|
st->start_time = pkt->pts;
|
|
}
|
|
av_free_packet(pkt);
|
|
}
|
|
|
|
/* estimate the end time (duration) */
|
|
/* XXX: may need to support wrapping */
|
|
filesize = ic->file_size;
|
|
offset = filesize - DURATION_MAX_READ_SIZE;
|
|
if (offset < 0)
|
|
offset = 0;
|
|
|
|
url_fseek(&ic->pb, offset, SEEK_SET);
|
|
read_size = 0;
|
|
for(;;) {
|
|
if (read_size >= DURATION_MAX_READ_SIZE)
|
|
break;
|
|
/* if all info is available, we can stop */
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->duration == AV_NOPTS_VALUE)
|
|
break;
|
|
}
|
|
if (i == ic->nb_streams)
|
|
break;
|
|
|
|
ret = av_read_packet(ic, pkt);
|
|
if (ret != 0)
|
|
break;
|
|
read_size += pkt->size;
|
|
st = ic->streams[pkt->stream_index];
|
|
if (pkt->pts != AV_NOPTS_VALUE) {
|
|
end_time = pkt->pts;
|
|
duration = end_time - st->start_time;
|
|
if (duration > 0) {
|
|
if (st->duration == AV_NOPTS_VALUE ||
|
|
st->duration < duration)
|
|
st->duration = duration;
|
|
}
|
|
}
|
|
av_free_packet(pkt);
|
|
}
|
|
|
|
fill_all_stream_timings(ic);
|
|
|
|
url_fseek(&ic->pb, 0, SEEK_SET);
|
|
}
|
|
|
|
static void av_estimate_timings(AVFormatContext *ic)
|
|
{
|
|
int64_t file_size;
|
|
|
|
/* get the file size, if possible */
|
|
if (ic->iformat->flags & AVFMT_NOFILE) {
|
|
file_size = 0;
|
|
} else {
|
|
file_size = url_fsize(&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.is_streamed) {
|
|
/* get accurate estimate from the PTSes */
|
|
av_estimate_timings_from_pts(ic);
|
|
} else if (av_has_timings(ic)) {
|
|
/* at least one components has timings - we use them for all
|
|
the components */
|
|
fill_all_stream_timings(ic);
|
|
} else {
|
|
/* less precise: use bit rate info */
|
|
av_estimate_timings_from_bit_rate(ic);
|
|
}
|
|
av_update_stream_timings(ic);
|
|
|
|
#if 0
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
for(i = 0;i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
printf("%d: start_time: %0.3f duration: %0.3f\n",
|
|
i, (double)st->start_time / AV_TIME_BASE,
|
|
(double)st->duration / AV_TIME_BASE);
|
|
}
|
|
printf("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);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static int has_codec_parameters(AVCodecContext *enc)
|
|
{
|
|
int val;
|
|
switch(enc->codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
val = enc->sample_rate;
|
|
break;
|
|
case CODEC_TYPE_VIDEO:
|
|
val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
|
|
break;
|
|
default:
|
|
val = 1;
|
|
break;
|
|
}
|
|
return (val != 0);
|
|
}
|
|
|
|
static int try_decode_frame(AVStream *st, const uint8_t *data, int size)
|
|
{
|
|
int16_t *samples;
|
|
AVCodec *codec;
|
|
int got_picture, ret=0;
|
|
AVFrame picture;
|
|
|
|
if(!st->codec->codec){
|
|
codec = avcodec_find_decoder(st->codec->codec_id);
|
|
if (!codec)
|
|
return -1;
|
|
ret = avcodec_open(st->codec, codec);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if(!has_codec_parameters(st->codec)){
|
|
switch(st->codec->codec_type) {
|
|
case CODEC_TYPE_VIDEO:
|
|
ret = avcodec_decode_video(st->codec, &picture,
|
|
&got_picture, (uint8_t *)data, size);
|
|
break;
|
|
case CODEC_TYPE_AUDIO:
|
|
samples = av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);
|
|
if (!samples)
|
|
goto fail;
|
|
ret = avcodec_decode_audio(st->codec, samples,
|
|
&got_picture, (uint8_t *)data, size);
|
|
av_free(samples);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
/* absolute maximum size we read until we abort */
|
|
#define MAX_READ_SIZE 5000000
|
|
|
|
#define MAX_STD_TIMEBASES (60*12+5)
|
|
static int get_std_framerate(int i){
|
|
if(i<60*12) return i*1001;
|
|
else return ((int[]){24,30,60,12,15})[i-60*12]*1000*12;
|
|
}
|
|
|
|
/**
|
|
* Read the beginning of a media file to get stream information. This
|
|
* is useful for file formats with no headers such as MPEG. This
|
|
* function also compute the real frame rate in case of mpeg2 repeat
|
|
* frame mode.
|
|
*
|
|
* @param ic media file handle
|
|
* @return >=0 if OK. AVERROR_xxx if error.
|
|
* @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need
|
|
*/
|
|
int av_find_stream_info(AVFormatContext *ic)
|
|
{
|
|
int i, count, ret, read_size, j;
|
|
AVStream *st;
|
|
AVPacket pkt1, *pkt;
|
|
AVPacketList *pktl=NULL, **ppktl;
|
|
int64_t last_dts[MAX_STREAMS];
|
|
int duration_count[MAX_STREAMS]={0};
|
|
double duration_error[MAX_STREAMS][MAX_STD_TIMEBASES]={{0}}; //FIXME malloc()?
|
|
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if(st->codec->codec_type == CODEC_TYPE_VIDEO){
|
|
/* 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) {
|
|
st->parser = av_parser_init(st->codec->codec_id);
|
|
if(st->need_parsing == 2 && st->parser){
|
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(i=0;i<MAX_STREAMS;i++){
|
|
last_dts[i]= AV_NOPTS_VALUE;
|
|
}
|
|
|
|
count = 0;
|
|
read_size = 0;
|
|
ppktl = &ic->packet_buffer;
|
|
for(;;) {
|
|
/* check if one codec still needs to be handled */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (!has_codec_parameters(st->codec))
|
|
break;
|
|
/* variable fps and no guess at the real fps */
|
|
if( st->codec->time_base.den >= 101LL*st->codec->time_base.num
|
|
&& duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
|
|
break;
|
|
if(st->parser && st->parser->parser->split && !st->codec->extradata)
|
|
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;
|
|
break;
|
|
}
|
|
}
|
|
/* we did not get all the codec info, but we read too much data */
|
|
if (read_size >= MAX_READ_SIZE) {
|
|
ret = count;
|
|
break;
|
|
}
|
|
|
|
/* NOTE: a new stream can be added there if no header in file
|
|
(AVFMTCTX_NOHEADER) */
|
|
ret = av_read_frame_internal(ic, &pkt1);
|
|
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_INFO, "Could not find codec parameters (%s)\n", buf);
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
pktl = av_mallocz(sizeof(AVPacketList));
|
|
if (!pktl) {
|
|
ret = AVERROR_NOMEM;
|
|
break;
|
|
}
|
|
|
|
/* add the packet in the buffered packet list */
|
|
*ppktl = pktl;
|
|
ppktl = &pktl->next;
|
|
|
|
pkt = &pktl->pkt;
|
|
*pkt = pkt1;
|
|
|
|
/* duplicate the packet */
|
|
if (av_dup_packet(pkt) < 0) {
|
|
ret = AVERROR_NOMEM;
|
|
break;
|
|
}
|
|
|
|
read_size += pkt->size;
|
|
|
|
st = ic->streams[pkt->stream_index];
|
|
if(st->codec_info_nb_frames>1) //FIXME move codec_info_nb_frames and codec_info_duration from AVStream into this func
|
|
st->codec_info_duration += pkt->duration;
|
|
if (pkt->duration != 0)
|
|
st->codec_info_nb_frames++;
|
|
|
|
{
|
|
int index= pkt->stream_index;
|
|
int64_t last= last_dts[index];
|
|
int64_t duration= pkt->dts - last;
|
|
|
|
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
|
|
double dur= duration * av_q2d(st->time_base);
|
|
|
|
// if(st->codec->codec_type == CODEC_TYPE_VIDEO)
|
|
// av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
|
|
if(duration_count[index] < 2)
|
|
memset(duration_error, 0, sizeof(duration_error));
|
|
for(i=1; i<MAX_STD_TIMEBASES; i++){
|
|
int framerate= get_std_framerate(i);
|
|
int ticks= lrintf(dur*framerate/(1001*12));
|
|
double error= dur - ticks*1001*12/(double)framerate;
|
|
duration_error[index][i] += error*error;
|
|
}
|
|
duration_count[index]++;
|
|
|
|
if(st->codec_info_nb_frames == 0 && 0)
|
|
st->codec_info_duration += duration;
|
|
}
|
|
if(last == AV_NOPTS_VALUE || duration_count[index]<=1)
|
|
last_dts[pkt->stream_index]= 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 MPEG4, we need to
|
|
decompress for Quicktime. */
|
|
if (!has_codec_parameters(st->codec) /*&&
|
|
(st->codec->codec_id == CODEC_ID_FLV1 ||
|
|
st->codec->codec_id == CODEC_ID_H264 ||
|
|
st->codec->codec_id == CODEC_ID_H263 ||
|
|
st->codec->codec_id == CODEC_ID_H261 ||
|
|
st->codec->codec_id == CODEC_ID_VORBIS ||
|
|
st->codec->codec_id == CODEC_ID_MJPEG ||
|
|
st->codec->codec_id == CODEC_ID_PNG ||
|
|
st->codec->codec_id == CODEC_ID_PAM ||
|
|
st->codec->codec_id == CODEC_ID_PGM ||
|
|
st->codec->codec_id == CODEC_ID_PGMYUV ||
|
|
st->codec->codec_id == CODEC_ID_PBM ||
|
|
st->codec->codec_id == CODEC_ID_PPM ||
|
|
st->codec->codec_id == CODEC_ID_SHORTEN ||
|
|
(st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
|
|
try_decode_frame(st, pkt->data, pkt->size);
|
|
|
|
if (av_rescale_q(st->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
|
|
break;
|
|
}
|
|
count++;
|
|
}
|
|
|
|
// close codecs which where 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->codec_type == CODEC_TYPE_VIDEO) {
|
|
if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_sample)
|
|
st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
|
|
|
|
if(duration_count[i]
|
|
&& (st->codec->time_base.num*101LL <= st->codec->time_base.den || st->codec->codec_id == CODEC_ID_MPEG2VIDEO) /*&&
|
|
//FIXME we should not special case mpeg2, but this needs testing with non mpeg2 ...
|
|
st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){
|
|
double best_error= 2*av_q2d(st->time_base);
|
|
best_error= best_error*best_error*duration_count[i]*1000*12*30;
|
|
|
|
for(j=1; j<MAX_STD_TIMEBASES; j++){
|
|
double error= duration_error[i][j] * get_std_framerate(j);
|
|
// if(st->codec->codec_type == CODEC_TYPE_VIDEO)
|
|
// av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
|
|
if(error < best_error){
|
|
best_error= error;
|
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, get_std_framerate(j), 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 * (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;
|
|
}else{
|
|
st->r_frame_rate.num = st->time_base.den;
|
|
st->r_frame_rate.den = st->time_base.num;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
av_estimate_timings(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 == CODEC_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
|
|
return ret;
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
/**
|
|
* start playing a network based stream (e.g. RTSP stream) at the
|
|
* current position
|
|
*/
|
|
int av_read_play(AVFormatContext *s)
|
|
{
|
|
if (!s->iformat->read_play)
|
|
return AVERROR_NOTSUPP;
|
|
return s->iformat->read_play(s);
|
|
}
|
|
|
|
/**
|
|
* Pause a network based stream (e.g. RTSP stream).
|
|
*
|
|
* Use av_read_play() to resume it.
|
|
*/
|
|
int av_read_pause(AVFormatContext *s)
|
|
{
|
|
if (!s->iformat->read_pause)
|
|
return AVERROR_NOTSUPP;
|
|
return s->iformat->read_pause(s);
|
|
}
|
|
|
|
/**
|
|
* Close a media file (but not its codecs).
|
|
*
|
|
* @param s media file handle
|
|
*/
|
|
void av_close_input_file(AVFormatContext *s)
|
|
{
|
|
int i, must_open_file;
|
|
AVStream *st;
|
|
|
|
/* free previous packet */
|
|
if (s->cur_st && s->cur_st->parser)
|
|
av_free_packet(&s->cur_pkt);
|
|
|
|
if (s->iformat->read_close)
|
|
s->iformat->read_close(s);
|
|
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(st->index_entries);
|
|
av_free(st->codec->extradata);
|
|
av_free(st->codec);
|
|
av_free(st);
|
|
}
|
|
flush_packet_queue(s);
|
|
must_open_file = 1;
|
|
if (s->iformat->flags & AVFMT_NOFILE) {
|
|
must_open_file = 0;
|
|
}
|
|
if (must_open_file) {
|
|
url_fclose(&s->pb);
|
|
}
|
|
av_freep(&s->priv_data);
|
|
av_free(s);
|
|
}
|
|
|
|
/**
|
|
* Add a new stream to a media file.
|
|
*
|
|
* Can only be called in the read_header() function. If the flag
|
|
* AVFMTCTX_NOHEADER is in the format context, then new streams
|
|
* can be added in read_packet too.
|
|
*
|
|
* @param s media file handle
|
|
* @param id file format dependent stream id
|
|
*/
|
|
AVStream *av_new_stream(AVFormatContext *s, int id)
|
|
{
|
|
AVStream *st;
|
|
int i;
|
|
|
|
if (s->nb_streams >= MAX_STREAMS)
|
|
return NULL;
|
|
|
|
st = av_mallocz(sizeof(AVStream));
|
|
if (!st)
|
|
return NULL;
|
|
|
|
st->codec= avcodec_alloc_context();
|
|
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;
|
|
st->cur_dts = AV_NOPTS_VALUE;
|
|
|
|
/* default pts settings 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;
|
|
|
|
s->streams[s->nb_streams++] = st;
|
|
return st;
|
|
}
|
|
|
|
/************************************************************/
|
|
/* output media file */
|
|
|
|
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
int ret;
|
|
|
|
if (s->oformat->priv_data_size > 0) {
|
|
s->priv_data = av_mallocz(s->oformat->priv_data_size);
|
|
if (!s->priv_data)
|
|
return AVERROR_NOMEM;
|
|
} else
|
|
s->priv_data = NULL;
|
|
|
|
if (s->oformat->set_parameters) {
|
|
ret = s->oformat->set_parameters(s, ap);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* allocate the stream private data and write the stream header to an
|
|
* output media file
|
|
*
|
|
* @param s media file handle
|
|
* @return 0 if OK. AVERROR_xxx if error.
|
|
*/
|
|
int av_write_header(AVFormatContext *s)
|
|
{
|
|
int ret, i;
|
|
AVStream *st;
|
|
|
|
// some sanity checks
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
st = s->streams[i];
|
|
|
|
switch (st->codec->codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
if(st->codec->sample_rate<=0){
|
|
av_log(s, AV_LOG_ERROR, "sample rate not set\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case CODEC_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");
|
|
return -1;
|
|
}
|
|
if(st->codec->width<=0 || st->codec->height<=0){
|
|
av_log(s, AV_LOG_ERROR, "dimensions not set\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if(s->oformat->codec_tag){
|
|
if(st->codec->codec_tag){
|
|
//FIXME
|
|
//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 < ?
|
|
}else
|
|
st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
|
|
}
|
|
}
|
|
|
|
if (!s->priv_data && s->oformat->priv_data_size > 0) {
|
|
s->priv_data = av_mallocz(s->oformat->priv_data_size);
|
|
if (!s->priv_data)
|
|
return AVERROR_NOMEM;
|
|
}
|
|
|
|
if(s->oformat->write_header){
|
|
ret = s->oformat->write_header(s);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
/* 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 CODEC_TYPE_AUDIO:
|
|
den = (int64_t)st->time_base.num * st->codec->sample_rate;
|
|
break;
|
|
case CODEC_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)
|
|
return AVERROR_INVALIDDATA;
|
|
av_frac_init(&st->pts, 0, 0, den);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//FIXME merge with compute_pkt_fields
|
|
static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){
|
|
int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
|
|
int num, den, frame_size, i;
|
|
|
|
// av_log(st->codec, AV_LOG_DEBUG, "av_write_frame: 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 -1;*/
|
|
|
|
/* 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, den * (int64_t)st->time_base.num);
|
|
}
|
|
}
|
|
|
|
//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){
|
|
st->pts_buffer[0]= pkt->pts;
|
|
for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
|
|
st->pts_buffer[i]= (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 && st->cur_dts >= pkt->dts){
|
|
av_log(NULL, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts);
|
|
return -1;
|
|
}
|
|
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
|
|
av_log(NULL, AV_LOG_ERROR, "error, pts < dts\n");
|
|
return -1;
|
|
}
|
|
|
|
// av_log(NULL, 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 CODEC_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)) {
|
|
av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
|
|
}
|
|
break;
|
|
case CODEC_TYPE_VIDEO:
|
|
av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void truncate_ts(AVStream *st, AVPacket *pkt){
|
|
int64_t pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1;
|
|
|
|
// if(pkt->dts < 0)
|
|
// pkt->dts= 0; //this happens for low_delay=0 and b frames, FIXME, needs further invstigation about what we should do here
|
|
|
|
if (pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->pts &= pts_mask;
|
|
if (pkt->dts != AV_NOPTS_VALUE)
|
|
pkt->dts &= pts_mask;
|
|
}
|
|
|
|
/**
|
|
* Write a packet to an output media file.
|
|
*
|
|
* The packet shall contain one audio or video frame.
|
|
* The packet must be correctly interleaved according to the container specification,
|
|
* if not then av_interleaved_write_frame must be used
|
|
*
|
|
* @param s media file handle
|
|
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
|
|
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
|
|
*/
|
|
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret;
|
|
|
|
ret=compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
|
|
if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
|
return ret;
|
|
|
|
truncate_ts(s->streams[pkt->stream_index], pkt);
|
|
|
|
ret= s->oformat->write_packet(s, pkt);
|
|
if(!ret)
|
|
ret= url_ferror(&s->pb);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Interleave a packet per DTS in an output media file.
|
|
*
|
|
* Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
|
|
* so they cannot be used after it, note calling av_free_packet() on them is still safe.
|
|
*
|
|
* @param s media file handle
|
|
* @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 occured
|
|
*/
|
|
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
|
|
AVPacketList *pktl, **next_point, *this_pktl;
|
|
int stream_count=0;
|
|
int streams[MAX_STREAMS];
|
|
|
|
if(pkt){
|
|
AVStream *st= s->streams[ pkt->stream_index];
|
|
|
|
// assert(pkt->destruct != av_destruct_packet); //FIXME
|
|
|
|
this_pktl = av_mallocz(sizeof(AVPacketList));
|
|
this_pktl->pkt= *pkt;
|
|
if(pkt->destruct == av_destruct_packet)
|
|
pkt->destruct= NULL; // non shared -> must keep original from being freed
|
|
else
|
|
av_dup_packet(&this_pktl->pkt); //shared -> must dup
|
|
|
|
next_point = &s->packet_buffer;
|
|
while(*next_point){
|
|
AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
|
|
int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
|
|
int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
|
|
if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
|
|
break;
|
|
next_point= &(*next_point)->next;
|
|
}
|
|
this_pktl->next= *next_point;
|
|
*next_point= this_pktl;
|
|
}
|
|
|
|
memset(streams, 0, sizeof(streams));
|
|
pktl= s->packet_buffer;
|
|
while(pktl){
|
|
//av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
|
|
if(streams[ pktl->pkt.stream_index ] == 0)
|
|
stream_count++;
|
|
streams[ pktl->pkt.stream_index ]++;
|
|
pktl= pktl->next;
|
|
}
|
|
|
|
if(s->nb_streams == stream_count || (flush && stream_count)){
|
|
pktl= s->packet_buffer;
|
|
*out= pktl->pkt;
|
|
|
|
s->packet_buffer= pktl->next;
|
|
av_freep(&pktl);
|
|
return 1;
|
|
}else{
|
|
av_init_packet(out);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Interleaves a 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 occured
|
|
*/
|
|
static int av_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);
|
|
}
|
|
|
|
/**
|
|
* Writes a packet to an output media file ensuring correct interleaving.
|
|
*
|
|
* The packet must contain one audio or video frame.
|
|
* If the packets are already correctly interleaved the application should
|
|
* call av_write_frame() instead as its slightly faster, its also important
|
|
* to keep in mind that completly non interleaved input will need huge amounts
|
|
* of memory to interleave with this, so its prefereable to interleave at the
|
|
* demuxer level
|
|
*
|
|
* @param s media file handle
|
|
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
|
|
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
|
|
*/
|
|
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
|
|
AVStream *st= s->streams[ pkt->stream_index];
|
|
|
|
//FIXME/XXX/HACK drop zero sized packets
|
|
if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
|
|
return 0;
|
|
|
|
//av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
|
|
if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
|
|
return -1;
|
|
|
|
if(pkt->dts == AV_NOPTS_VALUE)
|
|
return -1;
|
|
|
|
for(;;){
|
|
AVPacket opkt;
|
|
int ret= av_interleave_packet(s, &opkt, pkt, 0);
|
|
if(ret<=0) //FIXME cleanup needed for ret<0 ?
|
|
return ret;
|
|
|
|
truncate_ts(s->streams[opkt.stream_index], &opkt);
|
|
ret= s->oformat->write_packet(s, &opkt);
|
|
|
|
av_free_packet(&opkt);
|
|
pkt= NULL;
|
|
|
|
if(ret<0)
|
|
return ret;
|
|
if(url_ferror(&s->pb))
|
|
return url_ferror(&s->pb);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Write the stream trailer to an output media file and
|
|
* free the file private data.
|
|
*
|
|
* @param s media file handle
|
|
* @return 0 if OK. AVERROR_xxx if error.
|
|
*/
|
|
int av_write_trailer(AVFormatContext *s)
|
|
{
|
|
int ret, i;
|
|
|
|
for(;;){
|
|
AVPacket pkt;
|
|
ret= av_interleave_packet(s, &pkt, NULL, 1);
|
|
if(ret<0) //FIXME cleanup needed for ret<0 ?
|
|
goto fail;
|
|
if(!ret)
|
|
break;
|
|
|
|
truncate_ts(s->streams[pkt.stream_index], &pkt);
|
|
ret= s->oformat->write_packet(s, &pkt);
|
|
|
|
av_free_packet(&pkt);
|
|
|
|
if(ret<0)
|
|
goto fail;
|
|
if(url_ferror(&s->pb))
|
|
goto fail;
|
|
}
|
|
|
|
if(s->oformat->write_trailer)
|
|
ret = s->oformat->write_trailer(s);
|
|
fail:
|
|
if(ret == 0)
|
|
ret=url_ferror(&s->pb);
|
|
for(i=0;i<s->nb_streams;i++)
|
|
av_freep(&s->streams[i]->priv_data);
|
|
av_freep(&s->priv_data);
|
|
return ret;
|
|
}
|
|
|
|
/* "user interface" functions */
|
|
|
|
void dump_format(AVFormatContext *ic,
|
|
int index,
|
|
const char *url,
|
|
int is_output)
|
|
{
|
|
int i, flags;
|
|
char buf[256];
|
|
|
|
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);
|
|
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.%01d", hours, mins, secs,
|
|
(10 * 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 = 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_streams;i++) {
|
|
AVStream *st = ic->streams[i];
|
|
int g= ff_gcd(st->time_base.num, st->time_base.den);
|
|
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 (is_output)
|
|
flags = ic->oformat->flags;
|
|
else
|
|
flags = ic->iformat->flags;
|
|
if (flags & AVFMT_SHOW_IDS) {
|
|
av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
|
|
}
|
|
if (strlen(st->language) > 0) {
|
|
av_log(NULL, AV_LOG_INFO, "(%s)", st->language);
|
|
}
|
|
av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g);
|
|
av_log(NULL, AV_LOG_INFO, ": %s", buf);
|
|
if(st->codec->codec_type == CODEC_TYPE_VIDEO){
|
|
if(st->r_frame_rate.den && st->r_frame_rate.num)
|
|
av_log(NULL, AV_LOG_INFO, ", %5.2f fps(r)", av_q2d(st->r_frame_rate));
|
|
/* else if(st->time_base.den && st->time_base.num)
|
|
av_log(NULL, AV_LOG_INFO, ", %5.2f fps(m)", 1/av_q2d(st->time_base));*/
|
|
else
|
|
av_log(NULL, AV_LOG_INFO, ", %5.2f fps(c)", 1/av_q2d(st->codec->time_base));
|
|
}
|
|
av_log(NULL, AV_LOG_INFO, "\n");
|
|
}
|
|
}
|
|
|
|
typedef struct {
|
|
const char *abv;
|
|
int width, height;
|
|
int frame_rate, frame_rate_base;
|
|
} AbvEntry;
|
|
|
|
static AbvEntry frame_abvs[] = {
|
|
{ "ntsc", 720, 480, 30000, 1001 },
|
|
{ "pal", 720, 576, 25, 1 },
|
|
{ "qntsc", 352, 240, 30000, 1001 }, /* VCD compliant ntsc */
|
|
{ "qpal", 352, 288, 25, 1 }, /* VCD compliant pal */
|
|
{ "sntsc", 640, 480, 30000, 1001 }, /* square pixel ntsc */
|
|
{ "spal", 768, 576, 25, 1 }, /* square pixel pal */
|
|
{ "film", 352, 240, 24, 1 },
|
|
{ "ntsc-film", 352, 240, 24000, 1001 },
|
|
{ "sqcif", 128, 96, 0, 0 },
|
|
{ "qcif", 176, 144, 0, 0 },
|
|
{ "cif", 352, 288, 0, 0 },
|
|
{ "4cif", 704, 576, 0, 0 },
|
|
};
|
|
|
|
/**
|
|
* parses width and height out of string str.
|
|
*/
|
|
int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
|
|
{
|
|
int i;
|
|
int n = sizeof(frame_abvs) / sizeof(AbvEntry);
|
|
const char *p;
|
|
int frame_width = 0, frame_height = 0;
|
|
|
|
for(i=0;i<n;i++) {
|
|
if (!strcmp(frame_abvs[i].abv, str)) {
|
|
frame_width = frame_abvs[i].width;
|
|
frame_height = frame_abvs[i].height;
|
|
break;
|
|
}
|
|
}
|
|
if (i == n) {
|
|
p = str;
|
|
frame_width = strtol(p, (char **)&p, 10);
|
|
if (*p)
|
|
p++;
|
|
frame_height = strtol(p, (char **)&p, 10);
|
|
}
|
|
if (frame_width <= 0 || frame_height <= 0)
|
|
return -1;
|
|
*width_ptr = frame_width;
|
|
*height_ptr = frame_height;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Converts frame rate from string to a fraction.
|
|
*
|
|
* First we try to get an exact integer or fractional frame rate.
|
|
* If this fails we convert the frame rate to a double and return
|
|
* an approximate fraction using the DEFAULT_FRAME_RATE_BASE.
|
|
*/
|
|
int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg)
|
|
{
|
|
int i;
|
|
char* cp;
|
|
|
|
/* First, we check our abbreviation table */
|
|
for (i = 0; i < sizeof(frame_abvs)/sizeof(*frame_abvs); ++i)
|
|
if (!strcmp(frame_abvs[i].abv, arg)) {
|
|
*frame_rate = frame_abvs[i].frame_rate;
|
|
*frame_rate_base = frame_abvs[i].frame_rate_base;
|
|
return 0;
|
|
}
|
|
|
|
/* Then, we try to parse it as fraction */
|
|
cp = strchr(arg, '/');
|
|
if (!cp)
|
|
cp = strchr(arg, ':');
|
|
if (cp) {
|
|
char* cpp;
|
|
*frame_rate = strtol(arg, &cpp, 10);
|
|
if (cpp != arg || cpp == cp)
|
|
*frame_rate_base = strtol(cp+1, &cpp, 10);
|
|
else
|
|
*frame_rate = 0;
|
|
}
|
|
else {
|
|
/* Finally we give up and parse it as double */
|
|
AVRational time_base = av_d2q(strtod(arg, 0), DEFAULT_FRAME_RATE_BASE);
|
|
*frame_rate_base = time_base.den;
|
|
*frame_rate = time_base.num;
|
|
}
|
|
if (!*frame_rate || !*frame_rate_base)
|
|
return -1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Converts date string to number of seconds since Jan 1st, 1970.
|
|
*
|
|
* @code
|
|
* Syntax:
|
|
* - If not a duration:
|
|
* [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
|
|
* Time is localtime unless Z is suffixed to the end. In this case GMT
|
|
* Return the date in micro seconds since 1970
|
|
*
|
|
* - If a duration:
|
|
* HH[:MM[:SS[.m...]]]
|
|
* S+[.m...]
|
|
* @endcode
|
|
*/
|
|
#ifndef CONFIG_WINCE
|
|
int64_t parse_date(const char *datestr, int duration)
|
|
{
|
|
const char *p;
|
|
int64_t t;
|
|
struct tm dt;
|
|
int i;
|
|
static const char *date_fmt[] = {
|
|
"%Y-%m-%d",
|
|
"%Y%m%d",
|
|
};
|
|
static const char *time_fmt[] = {
|
|
"%H:%M:%S",
|
|
"%H%M%S",
|
|
};
|
|
const char *q;
|
|
int is_utc, len;
|
|
char lastch;
|
|
int negative = 0;
|
|
|
|
#undef time
|
|
time_t now = time(0);
|
|
|
|
len = strlen(datestr);
|
|
if (len > 0)
|
|
lastch = datestr[len - 1];
|
|
else
|
|
lastch = '\0';
|
|
is_utc = (lastch == 'z' || lastch == 'Z');
|
|
|
|
memset(&dt, 0, sizeof(dt));
|
|
|
|
p = datestr;
|
|
q = NULL;
|
|
if (!duration) {
|
|
for (i = 0; i < sizeof(date_fmt) / sizeof(date_fmt[0]); i++) {
|
|
q = small_strptime(p, date_fmt[i], &dt);
|
|
if (q) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!q) {
|
|
if (is_utc) {
|
|
dt = *gmtime(&now);
|
|
} else {
|
|
dt = *localtime(&now);
|
|
}
|
|
dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
|
|
} else {
|
|
p = q;
|
|
}
|
|
|
|
if (*p == 'T' || *p == 't' || *p == ' ')
|
|
p++;
|
|
|
|
for (i = 0; i < sizeof(time_fmt) / sizeof(time_fmt[0]); i++) {
|
|
q = small_strptime(p, time_fmt[i], &dt);
|
|
if (q) {
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
if (p[0] == '-') {
|
|
negative = 1;
|
|
++p;
|
|
}
|
|
q = small_strptime(p, time_fmt[0], &dt);
|
|
if (!q) {
|
|
dt.tm_sec = strtol(p, (char **)&q, 10);
|
|
dt.tm_min = 0;
|
|
dt.tm_hour = 0;
|
|
}
|
|
}
|
|
|
|
/* Now we have all the fields that we can get */
|
|
if (!q) {
|
|
if (duration)
|
|
return 0;
|
|
else
|
|
return now * INT64_C(1000000);
|
|
}
|
|
|
|
if (duration) {
|
|
t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
|
|
} else {
|
|
dt.tm_isdst = -1; /* unknown */
|
|
if (is_utc) {
|
|
t = mktimegm(&dt);
|
|
} else {
|
|
t = mktime(&dt);
|
|
}
|
|
}
|
|
|
|
t *= 1000000;
|
|
|
|
if (*q == '.') {
|
|
int val, n;
|
|
q++;
|
|
for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
|
|
if (!isdigit(*q))
|
|
break;
|
|
val += n * (*q - '0');
|
|
}
|
|
t += val;
|
|
}
|
|
return negative ? -t : t;
|
|
}
|
|
#endif /* CONFIG_WINCE */
|
|
|
|
/**
|
|
* Attempts to find a specific tag in a URL.
|
|
*
|
|
* syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
|
|
* Return 1 if found.
|
|
*/
|
|
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
|
|
{
|
|
const char *p;
|
|
char tag[128], *q;
|
|
|
|
p = info;
|
|
if (*p == '?')
|
|
p++;
|
|
for(;;) {
|
|
q = tag;
|
|
while (*p != '\0' && *p != '=' && *p != '&') {
|
|
if ((q - tag) < sizeof(tag) - 1)
|
|
*q++ = *p;
|
|
p++;
|
|
}
|
|
*q = '\0';
|
|
q = arg;
|
|
if (*p == '=') {
|
|
p++;
|
|
while (*p != '&' && *p != '\0') {
|
|
if ((q - arg) < arg_size - 1) {
|
|
if (*p == '+')
|
|
*q++ = ' ';
|
|
else
|
|
*q++ = *p;
|
|
}
|
|
p++;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
if (!strcmp(tag, tag1))
|
|
return 1;
|
|
if (*p != '&')
|
|
break;
|
|
p++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Returns in 'buf' the path with '%d' replaced by number.
|
|
|
|
* Also handles the '%0nd' format where 'n' is the total number
|
|
* of digits and '%%'.
|
|
*
|
|
* @param buf destination buffer
|
|
* @param buf_size destination buffer size
|
|
* @param path numbered sequence string
|
|
* @number frame number
|
|
* @return 0 if OK, -1 if format error.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Print nice hexa dump of a buffer
|
|
* @param f stream for output
|
|
* @param buf buffer
|
|
* @param size buffer size
|
|
*/
|
|
void av_hex_dump(FILE *f, uint8_t *buf, int size)
|
|
{
|
|
int len, i, j, c;
|
|
|
|
for(i=0;i<size;i+=16) {
|
|
len = size - i;
|
|
if (len > 16)
|
|
len = 16;
|
|
fprintf(f, "%08x ", i);
|
|
for(j=0;j<16;j++) {
|
|
if (j < len)
|
|
fprintf(f, " %02x", buf[i+j]);
|
|
else
|
|
fprintf(f, " ");
|
|
}
|
|
fprintf(f, " ");
|
|
for(j=0;j<len;j++) {
|
|
c = buf[i+j];
|
|
if (c < ' ' || c > '~')
|
|
c = '.';
|
|
fprintf(f, "%c", c);
|
|
}
|
|
fprintf(f, "\n");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Print on 'f' a nice dump of a packet
|
|
* @param f stream for output
|
|
* @param pkt packet to dump
|
|
* @param dump_payload true if the payload must be displayed too
|
|
*/
|
|
//FIXME needs to know the time_base
|
|
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
|
|
{
|
|
fprintf(f, "stream #%d:\n", pkt->stream_index);
|
|
fprintf(f, " keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0));
|
|
fprintf(f, " duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
|
|
/* DTS is _always_ valid after av_read_frame() */
|
|
fprintf(f, " dts=");
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
fprintf(f, "N/A");
|
|
else
|
|
fprintf(f, "%0.3f", (double)pkt->dts / AV_TIME_BASE);
|
|
/* PTS may be not known if B frames are present */
|
|
fprintf(f, " pts=");
|
|
if (pkt->pts == AV_NOPTS_VALUE)
|
|
fprintf(f, "N/A");
|
|
else
|
|
fprintf(f, "%0.3f", (double)pkt->pts / AV_TIME_BASE);
|
|
fprintf(f, "\n");
|
|
fprintf(f, " size=%d\n", pkt->size);
|
|
if (dump_payload)
|
|
av_hex_dump(f, pkt->data, pkt->size);
|
|
}
|
|
|
|
void 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;
|
|
char *q;
|
|
int port;
|
|
|
|
port = -1;
|
|
|
|
p = url;
|
|
q = proto;
|
|
while (*p != ':' && *p != '\0') {
|
|
if ((q - proto) < proto_size - 1)
|
|
*q++ = *p;
|
|
p++;
|
|
}
|
|
if (proto_size > 0)
|
|
*q = '\0';
|
|
if (authorization_size > 0)
|
|
authorization[0] = '\0';
|
|
if (*p == '\0') {
|
|
if (proto_size > 0)
|
|
proto[0] = '\0';
|
|
if (hostname_size > 0)
|
|
hostname[0] = '\0';
|
|
p = url;
|
|
} else {
|
|
char *at,*slash; // PETR: position of '@' character and '/' character
|
|
|
|
p++;
|
|
if (*p == '/')
|
|
p++;
|
|
if (*p == '/')
|
|
p++;
|
|
at = strchr(p,'@'); // PETR: get the position of '@'
|
|
slash = strchr(p,'/'); // PETR: get position of '/' - end of hostname
|
|
if (at && slash && at > slash) at = NULL; // PETR: not interested in '@' behind '/'
|
|
|
|
q = at ? authorization : hostname; // PETR: if '@' exists starting with auth.
|
|
|
|
while ((at || *p != ':') && *p != '/' && *p != '?' && *p != '\0') { // PETR:
|
|
if (*p == '@') { // PETR: passed '@'
|
|
if (authorization_size > 0)
|
|
*q = '\0';
|
|
q = hostname;
|
|
at = NULL;
|
|
} else if (!at) { // PETR: hostname
|
|
if ((q - hostname) < hostname_size - 1)
|
|
*q++ = *p;
|
|
} else {
|
|
if ((q - authorization) < authorization_size - 1)
|
|
*q++ = *p;
|
|
}
|
|
p++;
|
|
}
|
|
if (hostname_size > 0)
|
|
*q = '\0';
|
|
if (*p == ':') {
|
|
p++;
|
|
port = strtoul(p, (char **)&p, 10);
|
|
}
|
|
}
|
|
if (port_ptr)
|
|
*port_ptr = port;
|
|
pstrcpy(path, path_size, p);
|
|
}
|
|
|
|
/**
|
|
* Set the pts for a given stream.
|
|
*
|
|
* @param s stream
|
|
* @param pts_wrap_bits number of bits effectively used by the pts
|
|
* (used for wrap control, 33 is the value for MPEG)
|
|
* @param pts_num numerator to convert to seconds (MPEG: 1)
|
|
* @param pts_den denominator to convert to seconds (MPEG: 90000)
|
|
*/
|
|
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
|
|
int pts_num, int pts_den)
|
|
{
|
|
s->pts_wrap_bits = pts_wrap_bits;
|
|
s->time_base.num = pts_num;
|
|
s->time_base.den = pts_den;
|
|
}
|
|
|
|
/* 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 av_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;
|
|
}
|
|
|
|
/**
|
|
* Fractionnal addition to f: f = f + (incr / f->den).
|
|
*
|
|
* @param f fractional number
|
|
* @param incr increment, can be positive or negative
|
|
*/
|
|
static void av_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;
|
|
}
|