1407 lines
36 KiB
C
1407 lines
36 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 library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avformat.h"
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#include <ctype.h>
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#ifdef CONFIG_WIN32
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#define strcasecmp _stricmp
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#include <sys/types.h>
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#include <sys/timeb.h>
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#elif defined(CONFIG_OS2)
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#include <string.h>
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#define strcasecmp stricmp
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#include <sys/time.h>
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#else
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#endif
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#include <time.h>
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#ifndef HAVE_STRPTIME
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#include "strptime.h"
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#endif
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AVInputFormat *first_iformat;
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AVOutputFormat *first_oformat;
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AVImageFormat *first_image_format;
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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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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 != ',')
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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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if (!short_name && filename &&
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filename_number_test(filename) >= 0 &&
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guess_image_format(filename)) {
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return guess_format("image", NULL, NULL);
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}
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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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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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static 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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void *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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/* fifo handling */
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int fifo_init(FifoBuffer *f, int size)
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{
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f->buffer = av_malloc(size);
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if (!f->buffer)
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return -1;
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f->end = f->buffer + size;
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f->wptr = f->rptr = f->buffer;
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return 0;
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}
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void fifo_free(FifoBuffer *f)
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{
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av_free(f->buffer);
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}
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int fifo_size(FifoBuffer *f, uint8_t *rptr)
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{
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int size;
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if (f->wptr >= rptr) {
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size = f->wptr - rptr;
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} else {
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size = (f->end - rptr) + (f->wptr - f->buffer);
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}
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return size;
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}
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/* get data from the fifo (return -1 if not enough data) */
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int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr)
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{
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uint8_t *rptr = *rptr_ptr;
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int size, len;
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if (f->wptr >= rptr) {
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size = f->wptr - rptr;
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} else {
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size = (f->end - rptr) + (f->wptr - f->buffer);
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}
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if (size < buf_size)
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return -1;
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while (buf_size > 0) {
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len = f->end - rptr;
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if (len > buf_size)
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len = buf_size;
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memcpy(buf, rptr, len);
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buf += len;
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rptr += len;
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if (rptr >= f->end)
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rptr = f->buffer;
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buf_size -= len;
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}
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*rptr_ptr = rptr;
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return 0;
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}
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void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr)
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{
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int len;
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uint8_t *wptr;
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wptr = *wptr_ptr;
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while (size > 0) {
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len = f->end - wptr;
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if (len > size)
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len = size;
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memcpy(wptr, buf, len);
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wptr += len;
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if (wptr >= f->end)
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wptr = f->buffer;
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buf += len;
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size -= len;
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}
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*wptr_ptr = wptr;
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}
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int filename_number_test(const char *filename)
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{
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char buf[1024];
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return get_frame_filename(buf, sizeof(buf), filename, 1);
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}
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/* guess file format */
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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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#define PROBE_BUF_SIZE 2048
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/**
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* Open a media file as input. The codec are not opened. Only the file
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* header (if present) is read.
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*
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* @param ic_ptr the opened media file handle is put here
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* @param filename filename to open.
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* @param fmt if non NULL, force the file format to use
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* @param buf_size optional buffer size (zero if default is OK)
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* @param ap additionnal parameters needed when opening the file (NULL if default)
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* @return 0 if OK. AVERROR_xxx otherwise.
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*/
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int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
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AVInputFormat *fmt,
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int buf_size,
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AVFormatParameters *ap)
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{
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AVFormatContext *ic = NULL;
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int err;
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char buf[PROBE_BUF_SIZE];
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AVProbeData probe_data, *pd = &probe_data;
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ic = av_mallocz(sizeof(AVFormatContext));
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if (!ic) {
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err = AVERROR_NOMEM;
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goto fail;
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}
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pstrcpy(ic->filename, sizeof(ic->filename), filename);
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pd->filename = ic->filename;
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pd->buf = buf;
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pd->buf_size = 0;
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if (!fmt) {
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/* guess format if no file can be opened */
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fmt = av_probe_input_format(pd, 0);
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}
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if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
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/* if no file needed do not try to open one */
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if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
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err = AVERROR_IO;
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goto fail;
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}
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if (buf_size > 0) {
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url_setbufsize(&ic->pb, buf_size);
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}
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if (!fmt) {
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/* read probe data */
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pd->buf_size = get_buffer(&ic->pb, buf, PROBE_BUF_SIZE);
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url_fseek(&ic->pb, 0, SEEK_SET);
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}
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}
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/* guess file format */
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if (!fmt) {
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fmt = av_probe_input_format(pd, 1);
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}
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/* if still no format found, error */
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if (!fmt) {
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err = AVERROR_NOFMT;
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goto fail1;
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}
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/* XXX: suppress this hack for redirectors */
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#ifdef CONFIG_NETWORK
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if (fmt == &redir_demux) {
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err = redir_open(ic_ptr, &ic->pb);
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url_fclose(&ic->pb);
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av_free(ic);
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return err;
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}
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#endif
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ic->iformat = fmt;
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/* check filename in case of an image number is expected */
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if (ic->iformat->flags & AVFMT_NEEDNUMBER) {
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if (filename_number_test(ic->filename) < 0) {
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err = AVERROR_NUMEXPECTED;
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goto fail1;
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}
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}
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/* allocate private data */
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if (fmt->priv_data_size > 0) {
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ic->priv_data = av_mallocz(fmt->priv_data_size);
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if (!ic->priv_data) {
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err = AVERROR_NOMEM;
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goto fail1;
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}
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} else
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ic->priv_data = NULL;
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/* default pts settings is MPEG like */
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av_set_pts_info(ic, 33, 1, 90000);
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err = ic->iformat->read_header(ic, ap);
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if (err < 0)
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goto fail1;
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*ic_ptr = ic;
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return 0;
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fail1:
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if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
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url_fclose(&ic->pb);
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}
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fail:
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if (ic) {
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av_freep(&ic->priv_data);
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}
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av_free(ic);
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*ic_ptr = NULL;
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return err;
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}
|
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/**
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* Read a packet from a media file
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* @param s media file handle
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* @param pkt is filled
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* @return 0 if OK. AVERROR_xxx if error.
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*/
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int av_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVPacketList *pktl;
|
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pktl = s->packet_buffer;
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if (pktl) {
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/* read packet from packet buffer, if there is data */
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*pkt = pktl->pkt;
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s->packet_buffer = pktl->next;
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av_free(pktl);
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return 0;
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} else {
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return s->iformat->read_packet(s, pkt);
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}
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}
|
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|
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/* state for codec information */
|
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#define CSTATE_NOTFOUND 0
|
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#define CSTATE_DECODING 1
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#define CSTATE_FOUND 2
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|
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static int has_codec_parameters(AVCodecContext *enc)
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{
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int val;
|
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switch(enc->codec_type) {
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case CODEC_TYPE_AUDIO:
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val = enc->sample_rate;
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break;
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case CODEC_TYPE_VIDEO:
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val = enc->width;
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break;
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default:
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val = 1;
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break;
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}
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return (val != 0);
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}
|
|
|
|
/**
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* 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.
|
|
*/
|
|
int av_find_stream_info(AVFormatContext *ic)
|
|
{
|
|
int i, count, ret, got_picture, size, read_size;
|
|
AVCodec *codec;
|
|
AVStream *st;
|
|
AVPacket *pkt;
|
|
AVFrame picture;
|
|
AVPacketList *pktl=NULL, **ppktl;
|
|
short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
|
|
uint8_t *ptr;
|
|
int min_read_size, max_read_size;
|
|
|
|
/* typical mpeg ts rate is 40 Mbits. DVD rate is about 10
|
|
Mbits. We read at most 0.2 second of file to find all streams */
|
|
|
|
/* XXX: base it on stream bitrate when possible */
|
|
if (ic->iformat == &mpegts_demux) {
|
|
/* maximum number of bytes we accept to read to find all the streams
|
|
in a file */
|
|
min_read_size = 6000000;
|
|
} else {
|
|
min_read_size = 250000;
|
|
}
|
|
/* max read size is 2 seconds of video max */
|
|
max_read_size = min_read_size * 10;
|
|
|
|
/* set initial codec state */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (has_codec_parameters(&st->codec))
|
|
st->codec_info_state = CSTATE_FOUND;
|
|
else
|
|
st->codec_info_state = CSTATE_NOTFOUND;
|
|
st->codec_info_nb_repeat_frames = 0;
|
|
st->codec_info_nb_real_frames = 0;
|
|
}
|
|
|
|
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 (st->codec_info_state != CSTATE_FOUND)
|
|
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->iformat->flags & AVFMT_NOHEADER) ||
|
|
read_size >= min_read_size) {
|
|
/* if we found the info for all the codecs, we can stop */
|
|
ret = count;
|
|
break;
|
|
}
|
|
} else {
|
|
/* we did not get all the codec info, but we read too much data */
|
|
if (read_size >= max_read_size) {
|
|
ret = count;
|
|
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;
|
|
|
|
/* NOTE: a new stream can be added there if no header in file
|
|
(AVFMT_NOHEADER) */
|
|
pkt = &pktl->pkt;
|
|
if (ic->iformat->read_packet(ic, pkt) < 0) {
|
|
/* EOF or error */
|
|
ret = -1; /* we could not have all the codec parameters before EOF */
|
|
if ((ic->iformat->flags & AVFMT_NOHEADER) &&
|
|
i == ic->nb_streams)
|
|
ret = 0;
|
|
break;
|
|
}
|
|
read_size += pkt->size;
|
|
|
|
/* open new codecs */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (st->codec_info_state == CSTATE_NOTFOUND) {
|
|
/* set to found in case of error */
|
|
st->codec_info_state = CSTATE_FOUND;
|
|
codec = avcodec_find_decoder(st->codec.codec_id);
|
|
if (codec) {
|
|
if(codec->capabilities & CODEC_CAP_TRUNCATED)
|
|
st->codec.flags |= CODEC_FLAG_TRUNCATED;
|
|
|
|
ret = avcodec_open(&st->codec, codec);
|
|
if (ret >= 0)
|
|
st->codec_info_state = CSTATE_DECODING;
|
|
}
|
|
}
|
|
}
|
|
|
|
st = ic->streams[pkt->stream_index];
|
|
if (st->codec_info_state == CSTATE_DECODING) {
|
|
/* decode the data and update codec parameters */
|
|
ptr = pkt->data;
|
|
size = pkt->size;
|
|
while (size > 0) {
|
|
switch(st->codec.codec_type) {
|
|
case CODEC_TYPE_VIDEO:
|
|
ret = avcodec_decode_video(&st->codec, &picture,
|
|
&got_picture, ptr, size);
|
|
break;
|
|
case CODEC_TYPE_AUDIO:
|
|
ret = avcodec_decode_audio(&st->codec, samples,
|
|
&got_picture, ptr, size);
|
|
break;
|
|
default:
|
|
ret = -1;
|
|
break;
|
|
}
|
|
if (ret < 0) {
|
|
/* if error, simply ignore because another packet
|
|
may be OK */
|
|
break;
|
|
}
|
|
if (got_picture) {
|
|
/* we got the parameters - now we can stop
|
|
examining this stream */
|
|
/* XXX: add a codec info so that we can decide if
|
|
the codec can repeat frames */
|
|
if (st->codec.codec_id == CODEC_ID_MPEG1VIDEO &&
|
|
ic->iformat != &mpegts_demux &&
|
|
st->codec.sub_id == 2) {
|
|
/* for mpeg2 video, we want to know the real
|
|
frame rate, so we decode 40 frames. In mpeg
|
|
TS case we do not do it because it would be
|
|
too long */
|
|
st->codec_info_nb_real_frames++;
|
|
st->codec_info_nb_repeat_frames += st->codec.coded_frame->repeat_pict;
|
|
#if 0
|
|
/* XXX: testing */
|
|
if ((st->codec_info_nb_real_frames % 24) == 23) {
|
|
st->codec_info_nb_repeat_frames += 2;
|
|
}
|
|
#endif
|
|
/* stop after 40 frames */
|
|
if (st->codec_info_nb_real_frames >= 40) {
|
|
av_reduce(
|
|
&st->r_frame_rate,
|
|
&st->r_frame_rate_base,
|
|
(int64_t)st->codec.frame_rate * st->codec_info_nb_real_frames,
|
|
st->codec_info_nb_real_frames + (st->codec_info_nb_repeat_frames >> 1),
|
|
1<<30);
|
|
goto close_codec;
|
|
}
|
|
} else {
|
|
close_codec:
|
|
st->codec_info_state = CSTATE_FOUND;
|
|
avcodec_close(&st->codec);
|
|
break;
|
|
}
|
|
}
|
|
ptr += ret;
|
|
size -= ret;
|
|
}
|
|
}
|
|
count++;
|
|
}
|
|
|
|
/* close each codec if there are opened */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (st->codec_info_state == CSTATE_DECODING)
|
|
avcodec_close(&st->codec);
|
|
}
|
|
|
|
/* set real frame rate info */
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
st = ic->streams[i];
|
|
if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
|
|
if (!st->r_frame_rate){
|
|
st->r_frame_rate = st->codec.frame_rate;
|
|
st->r_frame_rate_base = st->codec.frame_rate_base;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Close a media file (but not its codecs)
|
|
*
|
|
* @param s media file handle
|
|
*/
|
|
void av_close_input_file(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
|
|
if (s->iformat->read_close)
|
|
s->iformat->read_close(s);
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
av_free(s->streams[i]);
|
|
}
|
|
if (s->packet_buffer) {
|
|
AVPacketList *p, *p1;
|
|
p = s->packet_buffer;
|
|
while (p != NULL) {
|
|
p1 = p->next;
|
|
av_free_packet(&p->pkt);
|
|
av_free(p);
|
|
p = p1;
|
|
}
|
|
s->packet_buffer = NULL;
|
|
}
|
|
if (!(s->iformat->flags & AVFMT_NOFILE)) {
|
|
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 AVFMT_NOHEADER is in the format
|
|
* description, 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;
|
|
|
|
if (s->nb_streams >= MAX_STREAMS)
|
|
return NULL;
|
|
|
|
st = av_mallocz(sizeof(AVStream));
|
|
if (!st)
|
|
return NULL;
|
|
avcodec_get_context_defaults(&st->codec);
|
|
|
|
st->index = s->nb_streams;
|
|
st->id = id;
|
|
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;
|
|
|
|
/* default pts settings is MPEG like */
|
|
av_set_pts_info(s, 33, 1, 90000);
|
|
ret = s->oformat->write_header(s);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* init PTS generation */
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
st = s->streams[i];
|
|
|
|
switch (st->codec.codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
av_frac_init(&st->pts, 0, 0,
|
|
(int64_t)s->pts_num * st->codec.sample_rate);
|
|
break;
|
|
case CODEC_TYPE_VIDEO:
|
|
av_frac_init(&st->pts, 0, 0,
|
|
(int64_t)s->pts_num * st->codec.frame_rate);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Write a packet to an output media file. The packet shall contain
|
|
* one audio or video frame.
|
|
*
|
|
* @param s media file handle
|
|
* @param stream_index stream index
|
|
* @param buf buffer containing the frame data
|
|
* @param size size of buffer
|
|
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
|
|
*/
|
|
int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
|
|
int size)
|
|
{
|
|
AVStream *st;
|
|
int64_t pts_mask;
|
|
int ret, frame_size;
|
|
|
|
st = s->streams[stream_index];
|
|
pts_mask = (1LL << s->pts_wrap_bits) - 1;
|
|
ret = s->oformat->write_packet(s, stream_index, (uint8_t *)buf, size,
|
|
st->pts.val & pts_mask);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* update pts */
|
|
switch (st->codec.codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
if (st->codec.frame_size <= 1) {
|
|
frame_size = size / st->codec.channels;
|
|
/* specific hack for pcm codecs because no frame size is provided */
|
|
switch(st->codec.codec_id) {
|
|
case CODEC_ID_PCM_S16LE:
|
|
case CODEC_ID_PCM_S16BE:
|
|
case CODEC_ID_PCM_U16LE:
|
|
case CODEC_ID_PCM_U16BE:
|
|
frame_size >>= 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
frame_size = st->codec.frame_size;
|
|
}
|
|
av_frac_add(&st->pts,
|
|
(int64_t)s->pts_den * frame_size);
|
|
break;
|
|
case CODEC_TYPE_VIDEO:
|
|
av_frac_add(&st->pts,
|
|
(int64_t)s->pts_den * st->codec.frame_rate_base);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* write the stream trailer to an output media file and 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;
|
|
ret = s->oformat->write_trailer(s);
|
|
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];
|
|
|
|
fprintf(stderr, "%s #%d, %s, %s '%s':\n",
|
|
is_output ? "Output" : "Input",
|
|
index,
|
|
is_output ? ic->oformat->name : ic->iformat->name,
|
|
is_output ? "to" : "from", url);
|
|
for(i=0;i<ic->nb_streams;i++) {
|
|
AVStream *st = ic->streams[i];
|
|
avcodec_string(buf, sizeof(buf), &st->codec, is_output);
|
|
fprintf(stderr, " 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) {
|
|
fprintf(stderr, "[0x%x]", st->id);
|
|
}
|
|
fprintf(stderr, ": %s\n", buf);
|
|
}
|
|
}
|
|
|
|
typedef struct {
|
|
const char *str;
|
|
int width, height;
|
|
} SizeEntry;
|
|
|
|
static SizeEntry sizes[] = {
|
|
{ "sqcif", 128, 96 },
|
|
{ "qcif", 176, 144 },
|
|
{ "cif", 352, 288 },
|
|
{ "4cif", 704, 576 },
|
|
};
|
|
|
|
int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
|
|
{
|
|
int i;
|
|
int n = sizeof(sizes) / sizeof(SizeEntry);
|
|
const char *p;
|
|
int frame_width = 0, frame_height = 0;
|
|
|
|
for(i=0;i<n;i++) {
|
|
if (!strcmp(sizes[i].str, str)) {
|
|
frame_width = sizes[i].width;
|
|
frame_height = sizes[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;
|
|
}
|
|
|
|
int64_t av_gettime(void)
|
|
{
|
|
#ifdef CONFIG_WIN32
|
|
struct _timeb tb;
|
|
_ftime(&tb);
|
|
return ((int64_t)tb.time * int64_t_C(1000) + (int64_t)tb.millitm) * int64_t_C(1000);
|
|
#else
|
|
struct timeval tv;
|
|
gettimeofday(&tv,NULL);
|
|
return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
|
|
#endif
|
|
}
|
|
|
|
static time_t mktimegm(struct tm *tm)
|
|
{
|
|
time_t t;
|
|
|
|
int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
|
|
|
|
if (m < 3) {
|
|
m += 12;
|
|
y--;
|
|
}
|
|
|
|
t = 86400 *
|
|
(d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469);
|
|
|
|
t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
|
|
|
|
return t;
|
|
}
|
|
|
|
/* 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 duration:
|
|
* HH[:MM[:SS[.m...]]]
|
|
* S+[.m...]
|
|
*/
|
|
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;
|
|
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 = 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 = strptime(p, time_fmt[i], &dt);
|
|
if (q) {
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
q = 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_t_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 t;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Return in 'buf' the path with '%d' replaced by number. Also handles
|
|
the '%0nd' format where 'n' is the total number of digits and
|
|
'%%'. Return 0 if OK, and -1 if format error */
|
|
int get_frame_filename(char *buf, int buf_size,
|
|
const char *path, int number)
|
|
{
|
|
const char *p;
|
|
char *q, buf1[20];
|
|
int nd, len, c, 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++;
|
|
if (c == '*' && nd > 0) {
|
|
// The nd field is actually the modulus
|
|
number = number % nd;
|
|
c = *p++;
|
|
nd = 0;
|
|
}
|
|
} 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 on stdout a nice hexa dump of a buffer
|
|
* @param buf buffer
|
|
* @param size buffer size
|
|
*/
|
|
void av_hex_dump(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;
|
|
printf("%08x ", i);
|
|
for(j=0;j<16;j++) {
|
|
if (j < len)
|
|
printf(" %02x", buf[i+j]);
|
|
else
|
|
printf(" ");
|
|
}
|
|
printf(" ");
|
|
for(j=0;j<len;j++) {
|
|
c = buf[i+j];
|
|
if (c < ' ' || c > '~')
|
|
c = '.';
|
|
printf("%c", c);
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
void url_split(char *proto, int proto_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 (*p == '\0') {
|
|
if (proto_size > 0)
|
|
proto[0] = '\0';
|
|
if (hostname_size > 0)
|
|
hostname[0] = '\0';
|
|
p = url;
|
|
} else {
|
|
p++;
|
|
if (*p == '/')
|
|
p++;
|
|
if (*p == '/')
|
|
p++;
|
|
q = hostname;
|
|
while (*p != ':' && *p != '/' && *p != '?' && *p != '\0') {
|
|
if ((q - hostname) < hostname_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(AVFormatContext *s, int pts_wrap_bits,
|
|
int pts_num, int pts_den)
|
|
{
|
|
s->pts_wrap_bits = pts_wrap_bits;
|
|
s->pts_num = pts_num;
|
|
s->pts_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
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/* set f to (val + 0.5) */
|
|
void av_frac_set(AVFrac *f, int64_t val)
|
|
{
|
|
f->val = val;
|
|
f->num = f->den >> 1;
|
|
}
|
|
|
|
/**
|
|
* Fractionnal addition to f: f = f + (incr / f->den)
|
|
*
|
|
* @param f fractional number
|
|
* @param incr increment, can be positive or negative
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* register a new image format
|
|
* @param img_fmt Image format descriptor
|
|
*/
|
|
void av_register_image_format(AVImageFormat *img_fmt)
|
|
{
|
|
AVImageFormat **p;
|
|
|
|
p = &first_image_format;
|
|
while (*p != NULL) p = &(*p)->next;
|
|
*p = img_fmt;
|
|
img_fmt->next = NULL;
|
|
}
|
|
|
|
/* guess image format */
|
|
AVImageFormat *av_probe_image_format(AVProbeData *pd)
|
|
{
|
|
AVImageFormat *fmt1, *fmt;
|
|
int score, score_max;
|
|
|
|
fmt = NULL;
|
|
score_max = 0;
|
|
for(fmt1 = first_image_format; fmt1 != NULL; fmt1 = fmt1->next) {
|
|
if (fmt1->img_probe) {
|
|
score = fmt1->img_probe(pd);
|
|
if (score > score_max) {
|
|
score_max = score;
|
|
fmt = fmt1;
|
|
}
|
|
}
|
|
}
|
|
return fmt;
|
|
}
|
|
|
|
AVImageFormat *guess_image_format(const char *filename)
|
|
{
|
|
AVImageFormat *fmt1;
|
|
|
|
for(fmt1 = first_image_format; fmt1 != NULL; fmt1 = fmt1->next) {
|
|
if (fmt1->extensions && match_ext(filename, fmt1->extensions))
|
|
return fmt1;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Read an image from a stream.
|
|
* @param gb byte stream containing the image
|
|
* @param fmt image format, NULL if probing is required
|
|
*/
|
|
int av_read_image(ByteIOContext *pb, const char *filename,
|
|
AVImageFormat *fmt,
|
|
int (*alloc_cb)(void *, AVImageInfo *info), void *opaque)
|
|
{
|
|
char buf[PROBE_BUF_SIZE];
|
|
AVProbeData probe_data, *pd = &probe_data;
|
|
offset_t pos;
|
|
int ret;
|
|
|
|
if (!fmt) {
|
|
pd->filename = filename;
|
|
pd->buf = buf;
|
|
pos = url_ftell(pb);
|
|
pd->buf_size = get_buffer(pb, buf, PROBE_BUF_SIZE);
|
|
url_fseek(pb, pos, SEEK_SET);
|
|
fmt = av_probe_image_format(pd);
|
|
}
|
|
if (!fmt)
|
|
return AVERROR_NOFMT;
|
|
ret = fmt->img_read(pb, alloc_cb, opaque);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Write an image to a stream.
|
|
* @param pb byte stream for the image output
|
|
* @param fmt image format
|
|
* @param img image data and informations
|
|
*/
|
|
int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img)
|
|
{
|
|
return fmt->img_write(pb, img);
|
|
}
|
|
|