+++ /dev/null
-/*
- * Various utilities for ffmpeg system
- * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-
-AVInputFormat *first_iformat;
-AVOutputFormat *first_oformat;
-AVImageFormat *first_image_format;
-
-void av_register_input_format(AVInputFormat *format)
-{
- AVInputFormat **p;
- p = &first_iformat;
- while (*p != NULL) p = &(*p)->next;
- *p = format;
- format->next = NULL;
-}
-
-void av_register_output_format(AVOutputFormat *format)
-{
- AVOutputFormat **p;
- p = &first_oformat;
- while (*p != NULL) p = &(*p)->next;
- *p = format;
- format->next = NULL;
-}
-
-int match_ext(const char *filename, const char *extensions)
-{
- const char *ext, *p;
- char ext1[32], *q;
-
- ext = strrchr(filename, '.');
- if (ext) {
- ext++;
- p = extensions;
- for(;;) {
- q = ext1;
- while (*p != '\0' && *p != ',')
- *q++ = *p++;
- *q = '\0';
- if (!strcasecmp(ext1, ext))
- return 1;
- if (*p == '\0')
- break;
- p++;
- }
- }
- return 0;
-}
-
-AVOutputFormat *guess_format(const char *short_name, const char *filename,
- const char *mime_type)
-{
- AVOutputFormat *fmt, *fmt_found;
- int score_max, score;
-
- /* specific test for image sequences */
- if (!short_name && filename &&
- filename_number_test(filename) >= 0 &&
- guess_image_format(filename)) {
- return guess_format("image", NULL, NULL);
- }
-
- /* find the proper file type */
- fmt_found = NULL;
- score_max = 0;
- fmt = first_oformat;
- while (fmt != NULL) {
- score = 0;
- if (fmt->name && short_name && !strcmp(fmt->name, short_name))
- score += 100;
- if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
- score += 10;
- if (filename && fmt->extensions &&
- match_ext(filename, fmt->extensions)) {
- score += 5;
- }
- if (score > score_max) {
- score_max = score;
- fmt_found = fmt;
- }
- fmt = fmt->next;
- }
- return fmt_found;
-}
-
-AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
- const char *mime_type)
-{
- AVOutputFormat *fmt = guess_format(short_name, filename, mime_type);
-
- if (fmt) {
- AVOutputFormat *stream_fmt;
- char stream_format_name[64];
-
- snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
- stream_fmt = guess_format(stream_format_name, NULL, NULL);
-
- if (stream_fmt)
- fmt = stream_fmt;
- }
-
- return fmt;
-}
-
-AVInputFormat *av_find_input_format(const char *short_name)
-{
- AVInputFormat *fmt;
- for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
- if (!strcmp(fmt->name, short_name))
- return fmt;
- }
- return NULL;
-}
-
-/* memory handling */
-
-/**
- * Default packet destructor
- */
-static void av_destruct_packet(AVPacket *pkt)
-{
- av_free(pkt->data);
- pkt->data = NULL; pkt->size = 0;
-}
-
-/**
- * Allocate the payload of a packet and intialized its fields to default values.
- *
- * @param pkt packet
- * @param size wanted payload size
- * @return 0 if OK. AVERROR_xxx otherwise.
- */
-int av_new_packet(AVPacket *pkt, int size)
-{
- void *data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!data)
- return AVERROR_NOMEM;
- memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-
- av_init_packet(pkt);
- pkt->data = data;
- pkt->size = size;
- pkt->destruct = av_destruct_packet;
- return 0;
-}
-
-/* fifo handling */
-
-int fifo_init(FifoBuffer *f, int size)
-{
- f->buffer = av_malloc(size);
- if (!f->buffer)
- return -1;
- f->end = f->buffer + size;
- f->wptr = f->rptr = f->buffer;
- return 0;
-}
-
-void fifo_free(FifoBuffer *f)
-{
- av_free(f->buffer);
-}
-
-int fifo_size(FifoBuffer *f, uint8_t *rptr)
-{
- int size;
-
- if (f->wptr >= rptr) {
- size = f->wptr - rptr;
- } else {
- size = (f->end - rptr) + (f->wptr - f->buffer);
- }
- return size;
-}
-
-/* get data from the fifo (return -1 if not enough data) */
-int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr)
-{
- uint8_t *rptr = *rptr_ptr;
- int size, len;
-
- if (f->wptr >= rptr) {
- size = f->wptr - rptr;
- } else {
- size = (f->end - rptr) + (f->wptr - f->buffer);
- }
-
- if (size < buf_size)
- return -1;
- while (buf_size > 0) {
- len = f->end - rptr;
- if (len > buf_size)
- len = buf_size;
- memcpy(buf, rptr, len);
- buf += len;
- rptr += len;
- if (rptr >= f->end)
- rptr = f->buffer;
- buf_size -= len;
- }
- *rptr_ptr = rptr;
- return 0;
-}
-
-void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr)
-{
- int len;
- uint8_t *wptr;
- wptr = *wptr_ptr;
- while (size > 0) {
- len = f->end - wptr;
- if (len > size)
- len = size;
- memcpy(wptr, buf, len);
- wptr += len;
- if (wptr >= f->end)
- wptr = f->buffer;
- buf += len;
- size -= len;
- }
- *wptr_ptr = wptr;
-}
-
-int filename_number_test(const char *filename)
-{
- char buf[1024];
- return get_frame_filename(buf, sizeof(buf), filename, 1);
-}
-
-/* guess file format */
-AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
-{
- AVInputFormat *fmt1, *fmt;
- int score, score_max;
-
- fmt = NULL;
- score_max = 0;
- for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) {
- if (!is_opened && !(fmt1->flags & AVFMT_NOFILE))
- continue;
- score = 0;
- if (fmt1->read_probe) {
- score = fmt1->read_probe(pd);
- } else if (fmt1->extensions) {
- if (match_ext(pd->filename, fmt1->extensions)) {
- score = 50;
- }
- }
- if (score > score_max) {
- score_max = score;
- fmt = fmt1;
- }
- }
- return fmt;
-}
-
-/************************************************************/
-/* input media file */
-
-#define PROBE_BUF_SIZE 2048
-
-/**
- * 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)
-{
- AVFormatContext *ic = NULL;
- int err, must_open_file;
- char buf[PROBE_BUF_SIZE];
- AVProbeData probe_data, *pd = &probe_data;
-
- ic = av_mallocz(sizeof(AVFormatContext));
- if (!ic) {
- err = AVERROR_NOMEM;
- goto fail;
- }
- ic->duration = AV_NOPTS_VALUE;
- ic->start_time = AV_NOPTS_VALUE;
- pstrcpy(ic->filename, sizeof(ic->filename), filename);
- pd->filename = ic->filename;
- pd->buf = buf;
- 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))
-#ifdef CONFIG_NETWORK
- || (fmt == &rtp_demux && !strcmp(filename, "null"))
-#endif
- ) {
- must_open_file = 0;
- }
-
- if (!fmt || must_open_file) {
- /* if no file needed do not try to open one */
- if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
- err = AVERROR_IO;
- goto fail;
- }
- if (buf_size > 0) {
- url_setbufsize(&ic->pb, buf_size);
- }
- if (!fmt) {
- /* read probe data */
- pd->buf_size = get_buffer(&ic->pb, buf, PROBE_BUF_SIZE);
- url_fseek(&ic->pb, 0, SEEK_SET);
- }
- }
-
- /* guess file format */
- if (!fmt) {
- fmt = av_probe_input_format(pd, 1);
- }
-
- /* if still no format found, error */
- if (!fmt) {
- err = AVERROR_NOFMT;
- goto fail1;
- }
-
- /* XXX: suppress this hack for redirectors */
-#ifdef CONFIG_NETWORK
- if (fmt == &redir_demux) {
- err = redir_open(ic_ptr, &ic->pb);
- url_fclose(&ic->pb);
- av_free(ic);
- return err;
- }
-#endif
-
- ic->iformat = fmt;
-
- /* check filename in case of an image number is expected */
- if (ic->iformat->flags & AVFMT_NEEDNUMBER) {
- if (filename_number_test(ic->filename) < 0) {
- err = AVERROR_NUMEXPECTED;
- goto fail1;
- }
- }
-
- /* allocate private data */
- if (fmt->priv_data_size > 0) {
- ic->priv_data = av_mallocz(fmt->priv_data_size);
- if (!ic->priv_data) {
- err = AVERROR_NOMEM;
- goto fail1;
- }
- } else
- ic->priv_data = NULL;
-
- /* default pts settings is MPEG like */
- av_set_pts_info(ic, 33, 1, 90000);
-
- err = ic->iformat->read_header(ic, ap);
- if (err < 0)
- goto fail1;
- *ic_ptr = ic;
- return 0;
- fail1:
- if (!fmt || must_open_file) {
- url_fclose(&ic->pb);
- }
- fail:
- if (ic) {
- av_freep(&ic->priv_data);
- }
- av_free(ic);
- *ic_ptr = NULL;
- return err;
-}
-
-/**
- * Read a packet from a media file
- * @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)
-{
- AVPacketList *pktl;
-
- pktl = s->packet_buffer;
- if (pktl) {
- /* read packet from packet buffer, if there is data */
- *pkt = pktl->pkt;
- s->packet_buffer = pktl->next;
- av_free(pktl);
- return 0;
- } else {
- return s->iformat->read_packet(s, pkt);
- }
-}
-
-
-/* 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
- compute the global bitrate if possible */
-static void av_update_stream_timings(AVFormatContext *ic)
-{
- int64_t start_time, end_time, end_time1;
- int i;
- AVStream *st;
-
- start_time = MAXINT64;
- end_time = MININT64;
- for(i = 0;i < ic->nb_streams; i++) {
- st = ic->streams[i];
- if (st->start_time != AV_NOPTS_VALUE) {
- if (st->start_time < start_time)
- start_time = st->start_time;
- if (st->duration != AV_NOPTS_VALUE) {
- end_time1 = st->start_time + st->duration;
- if (end_time1 > end_time)
- end_time = end_time1;
- }
- }
- }
- if (start_time != MAXINT64) {
- ic->start_time = start_time;
- if (end_time != MAXINT64) {
- 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) {
- st->start_time = ic->start_time;
- st->duration = ic->duration;
- }
- }
-}
-
-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) {
- duration = (int64_t)((8 * AV_TIME_BASE * (double)filesize) / (double)ic->bit_rate);
- for(i = 0; i < ic->nb_streams; i++) {
- st = ic->streams[i];
- if (st->start_time == AV_NOPTS_VALUE ||
- st->duration == AV_NOPTS_VALUE) {
- st->start_time = 0;
- st->duration = duration;
- }
- }
- }
- }
-}
-
-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);
- }
-}
-
-#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 start_time, end_time, end_time1;
- int64_t filesize, offset, duration;
-
- /* 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 = (int64_t)((double)pkt->pts * ic->pts_num * (double)AV_TIME_BASE / ic->pts_den);
- }
- av_free_packet(pkt);
- }
-
- /* we compute the minimum start_time and use it as default */
- start_time = MAXINT64;
- for(i = 0; i < ic->nb_streams; i++) {
- st = ic->streams[i];
- if (st->start_time != AV_NOPTS_VALUE &&
- st->start_time < start_time)
- start_time = st->start_time;
- }
- if (start_time != MAXINT64)
- ic->start_time = start_time;
-
- /* 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;
-
- /* flush packet queue */
- flush_packet_queue(ic);
-
- 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 = (int64_t)((double)pkt->pts * ic->pts_num * (double)AV_TIME_BASE / ic->pts_den);
- 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);
- }
-
- /* estimate total duration */
- end_time = MININT64;
- for(i = 0;i < ic->nb_streams; i++) {
- st = ic->streams[i];
- if (st->duration != AV_NOPTS_VALUE) {
- end_time1 = st->start_time + st->duration;
- if (end_time1 > end_time)
- end_time = end_time1;
- }
- }
-
- /* update start_time (new stream may have been created, so we do
- it at the end */
- if (ic->start_time != AV_NOPTS_VALUE) {
- for(i = 0; i < ic->nb_streams; i++) {
- st = ic->streams[i];
- if (st->start_time == AV_NOPTS_VALUE)
- st->start_time = ic->start_time;
- }
- }
-
- if (end_time != MININT64) {
- /* put dummy values for duration if needed */
- for(i = 0;i < ic->nb_streams; i++) {
- st = ic->streams[i];
- if (st->duration == AV_NOPTS_VALUE &&
- st->start_time != AV_NOPTS_VALUE)
- st->duration = end_time - st->start_time;
- }
- ic->duration = end_time - ic->start_time;
- }
-
- url_fseek(&ic->pb, 0, SEEK_SET);
-}
-
-static void av_estimate_timings(AVFormatContext *ic)
-{
- URLContext *h;
- int64_t file_size;
-
- /* get the file size, if possible */
- if (ic->iformat->flags & AVFMT_NOFILE) {
- file_size = 0;
- } else {
- h = url_fileno(&ic->pb);
- file_size = url_filesize(h);
- if (file_size < 0)
- file_size = 0;
- }
- ic->file_size = file_size;
-
- if (ic->iformat == &mpegps_demux) {
- /* 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
-}
-
-/* state for codec information */
-#define CSTATE_NOTFOUND 0
-#define CSTATE_DECODING 1
-#define CSTATE_FOUND 2
-
-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;
- break;
- default:
- val = 1;
- break;
- }
- return (val != 0);
-}
-
-/**
- * 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)) * st->codec.frame_rate_base,
- 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;
- }
- }
- }
-
-
- av_estimate_timings(ic);
- return ret;
-}
-
-/**
- * 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;
-
- 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;
- }
- must_open_file = 1;
- if ((s->iformat->flags & AVFMT_NOFILE)
-#ifdef CONFIG_NETWORK
- || (s->iformat == &rtp_demux && !strcmp(s->filename, "null"))
-#endif
- ) {
- 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 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);
- 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;
- 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);
- if (!is_output) {
- fprintf(stderr, " 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;
- fprintf(stderr, "%02d:%02d:%02d.%01d", hours, mins, secs,
- (10 * us) / AV_TIME_BASE);
- } else {
- fprintf(stderr, "N/A");
- }
- fprintf(stderr, ", bitrate: ");
- if (ic->bit_rate) {
- fprintf(stderr,"%d kb/s", ic->bit_rate / 1000);
- } else {
- fprintf(stderr, "N/A");
- }
- fprintf(stderr, "\n");
- }
- 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 *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 },
-};
-
-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;
-}
-
-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) {
- 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 */
- *frame_rate_base = DEFAULT_FRAME_RATE_BASE;
- *frame_rate = (int)(strtod(arg, 0) * (*frame_rate_base) + 0.5);
- }
- if (!*frame_rate || !*frame_rate_base)
- return -1;
- else
- return 0;
-}
-
-/* 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 = 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 {
- 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_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++;
- } 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);
-}
-
projects / synfig.git / blobdiff