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utils.c
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/*
* various utility functions for use within FFmpeg
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/dict.h"
#include "libavutil/internal.h"
#include "libavutil/intmath.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixfmt.h"
#include "libavutil/thread.h"
#include "libavutil/time.h"
#include "libavcodec/bsf.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/internal.h"
#include "libavcodec/packet_internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#if CONFIG_NETWORK
#include "network.h"
#endif
#include "libavutil/ffversion.h"
const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
static AVMutex avformat_mutex = AV_MUTEX_INITIALIZER;
/**
* @file
* various utility functions for use within FFmpeg
*/
unsigned avformat_version(void)
{
av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
return LIBAVFORMAT_VERSION_INT;
}
const char *avformat_configuration(void)
{
return FFMPEG_CONFIGURATION;
}
const char *avformat_license(void)
{
#define LICENSE_PREFIX "libavformat license: "
return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
}
int ff_lock_avformat(void)
{
return ff_mutex_lock(&avformat_mutex) ? -1 : 0;
}
int ff_unlock_avformat(void)
{
return ff_mutex_unlock(&avformat_mutex) ? -1 : 0;
}
int64_t av_stream_get_end_pts(const AVStream *st)
{
if (cffstream(st)->priv_pts) {
return cffstream(st)->priv_pts->val;
} else
return AV_NOPTS_VALUE;
}
struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
{
return cffstream(st)->parser;
}
void avpriv_stream_set_need_parsing(AVStream *st, enum AVStreamParseType type)
{
ffstream(st)->need_parsing = type;
}
void av_format_inject_global_side_data(AVFormatContext *s)
{
FFFormatContext *const si = ffformatcontext(s);
si->inject_global_side_data = 1;
for (unsigned i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
ffstream(st)->inject_global_side_data = 1;
}
}
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
{
av_assert0(!dst->codec_whitelist &&
!dst->format_whitelist &&
!dst->protocol_whitelist &&
!dst->protocol_blacklist);
dst-> codec_whitelist = av_strdup(src->codec_whitelist);
dst->format_whitelist = av_strdup(src->format_whitelist);
dst->protocol_whitelist = av_strdup(src->protocol_whitelist);
dst->protocol_blacklist = av_strdup(src->protocol_blacklist);
if ( (src-> codec_whitelist && !dst-> codec_whitelist)
|| (src-> format_whitelist && !dst-> format_whitelist)
|| (src->protocol_whitelist && !dst->protocol_whitelist)
|| (src->protocol_blacklist && !dst->protocol_blacklist)) {
av_log(dst, AV_LOG_ERROR, "Failed to duplicate black/whitelist\n");
return AVERROR(ENOMEM);
}
return 0;
}
const AVCodec *ff_find_decoder(AVFormatContext *s, const AVStream *st,
enum AVCodecID codec_id)
{
switch (st->codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (s->video_codec) return s->video_codec;
break;
case AVMEDIA_TYPE_AUDIO:
if (s->audio_codec) return s->audio_codec;
break;
case AVMEDIA_TYPE_SUBTITLE:
if (s->subtitle_codec) return s->subtitle_codec;
break;
}
return avcodec_find_decoder(codec_id);
}
/* an arbitrarily chosen "sane" max packet size -- 50M */
#define SANE_CHUNK_SIZE (50000000)
/* Read the data in sane-sized chunks and append to pkt.
* Return the number of bytes read or an error. */
static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
{
int orig_size = pkt->size;
int ret;
do {
int prev_size = pkt->size;
int read_size;
/* When the caller requests a lot of data, limit it to the amount
* left in file or SANE_CHUNK_SIZE when it is not known. */
read_size = size;
if (read_size > SANE_CHUNK_SIZE/10) {
read_size = ffio_limit(s, read_size);
// If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
if (ffiocontext(s)->maxsize < 0)
read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
}
ret = av_grow_packet(pkt, read_size);
if (ret < 0)
break;
ret = avio_read(s, pkt->data + prev_size, read_size);
if (ret != read_size) {
av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
break;
}
size -= read_size;
} while (size > 0);
if (size > 0)
pkt->flags |= AV_PKT_FLAG_CORRUPT;
if (!pkt->size)
av_packet_unref(pkt);
return pkt->size > orig_size ? pkt->size - orig_size : ret;
}
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
{
#if FF_API_INIT_PACKET
FF_DISABLE_DEPRECATION_WARNINGS
av_init_packet(pkt);
pkt->data = NULL;
pkt->size = 0;
FF_ENABLE_DEPRECATION_WARNINGS
#else
av_packet_unref(pkt);
#endif
pkt->pos = avio_tell(s);
return append_packet_chunked(s, pkt, size);
}
int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
{
if (!pkt->size)
return av_get_packet(s, pkt, size);
return append_packet_chunked(s, pkt, size);
}
int av_filename_number_test(const char *filename)
{
char buf[1024];
return filename &&
(av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
}
int avformat_queue_attached_pictures(AVFormatContext *s)
{
FFFormatContext *const si = ffformatcontext(s);
int ret;
for (unsigned i = 0; i < s->nb_streams; i++)
if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
s->streams[i]->discard < AVDISCARD_ALL) {
if (s->streams[i]->attached_pic.size <= 0) {
av_log(s, AV_LOG_WARNING,
"Attached picture on stream %d has invalid size, "
"ignoring\n", i);
continue;
}
ret = avpriv_packet_list_put(&si->raw_packet_buffer,
&si->raw_packet_buffer_end,
&s->streams[i]->attached_pic,
av_packet_ref, 0);
if (ret < 0)
return ret;
}
return 0;
}
int ff_add_attached_pic(AVFormatContext *s, AVStream *st0, AVIOContext *pb,
AVBufferRef **buf, int size)
{
AVStream *st = st0;
AVPacket *pkt;
int ret;
if (!st && !(st = avformat_new_stream(s, NULL)))
return AVERROR(ENOMEM);
pkt = &st->attached_pic;
if (buf) {
av_assert1(*buf);
av_packet_unref(pkt);
pkt->buf = *buf;
pkt->data = (*buf)->data;
pkt->size = (*buf)->size - AV_INPUT_BUFFER_PADDING_SIZE;
*buf = NULL;
} else {
ret = av_get_packet(pb, pkt, size);
if (ret < 0)
goto fail;
}
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
pkt->stream_index = st->index;
pkt->flags |= AV_PKT_FLAG_KEY;
return 0;
fail:
if (!st0)
ff_free_stream(s, st);
return ret;
}
/**********************************************************/
int ff_is_intra_only(enum AVCodecID id)
{
const AVCodecDescriptor *d = avcodec_descriptor_get(id);
if (!d)
return 0;
if ((d->type == AVMEDIA_TYPE_VIDEO || d->type == AVMEDIA_TYPE_AUDIO) &&
!(d->props & AV_CODEC_PROP_INTRA_ONLY))
return 0;
return 1;
}
/* XXX: suppress the packet queue */
void ff_flush_packet_queue(AVFormatContext *s)
{
FFFormatContext *const si = ffformatcontext(s);
avpriv_packet_list_free(&si->parse_queue, &si->parse_queue_end);
avpriv_packet_list_free(&si->packet_buffer, &si->packet_buffer_end);
avpriv_packet_list_free(&si->raw_packet_buffer, &si->raw_packet_buffer_end);
si->raw_packet_buffer_size = 0;
}
int av_find_default_stream_index(AVFormatContext *s)
{
int best_stream = 0;
int best_score = INT_MIN;
if (s->nb_streams <= 0)
return -1;
for (unsigned i = 0; i < s->nb_streams; i++) {
const AVStream *const st = s->streams[i];
const FFStream *const sti = cffstream(st);
int score = 0;
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
score -= 400;
if (st->codecpar->width && st->codecpar->height)
score += 50;
score+= 25;
}
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
if (st->codecpar->sample_rate)
score += 50;
}
if (sti->codec_info_nb_frames)
score += 12;
if (st->discard != AVDISCARD_ALL)
score += 200;
if (score > best_score) {
best_score = score;
best_stream = i;
}
}
return best_stream;
}
/*******************************************************/
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
{
while (tags->id != AV_CODEC_ID_NONE) {
if (tags->id == id)
return tags->tag;
tags++;
}
return 0;
}
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
{
for (int i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
if (tag == tags[i].tag)
return tags[i].id;
for (int i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
return tags[i].id;
return AV_CODEC_ID_NONE;
}
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
{
if (bps <= 0 || bps > 64)
return AV_CODEC_ID_NONE;
if (flt) {
switch (bps) {
case 32:
return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
case 64:
return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
default:
return AV_CODEC_ID_NONE;
}
} else {
bps += 7;
bps >>= 3;
if (sflags & (1 << (bps - 1))) {
switch (bps) {
case 1:
return AV_CODEC_ID_PCM_S8;
case 2:
return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
case 3:
return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
case 4:
return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
case 8:
return be ? AV_CODEC_ID_PCM_S64BE : AV_CODEC_ID_PCM_S64LE;
default:
return AV_CODEC_ID_NONE;
}
} else {
switch (bps) {
case 1:
return AV_CODEC_ID_PCM_U8;
case 2:
return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
case 3:
return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
case 4:
return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
default:
return AV_CODEC_ID_NONE;
}
}
}
}
unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
{
unsigned int tag;
if (!av_codec_get_tag2(tags, id, &tag))
return 0;
return tag;
}
int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
unsigned int *tag)
{
for (int i = 0; tags && tags[i]; i++) {
const AVCodecTag *codec_tags = tags[i];
while (codec_tags->id != AV_CODEC_ID_NONE) {
if (codec_tags->id == id) {
*tag = codec_tags->tag;
return 1;
}
codec_tags++;
}
}
return 0;
}
enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
{
for (int i = 0; tags && tags[i]; i++) {
enum AVCodecID id = ff_codec_get_id(tags[i], tag);
if (id != AV_CODEC_ID_NONE)
return id;
}
return AV_CODEC_ID_NONE;
}
int ff_alloc_extradata(AVCodecParameters *par, int size)
{
av_freep(&par->extradata);
par->extradata_size = 0;
if (size < 0 || size >= INT32_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
return AVERROR(EINVAL);
par->extradata = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!par->extradata)
return AVERROR(ENOMEM);
memset(par->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
par->extradata_size = size;
return 0;
}
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
{
int ret = ff_alloc_extradata(par, size);
if (ret < 0)
return ret;
ret = ffio_read_size(pb, par->extradata, size);
if (ret < 0) {
av_freep(&par->extradata);
par->extradata_size = 0;
av_log(s, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
return ret;
}
return ret;
}
AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
{
for (unsigned i = 0; i < ic->nb_programs; i++) {
if (ic->programs[i] == last) {
last = NULL;
} else {
if (!last)
for (unsigned j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
if (ic->programs[i]->stream_index[j] == s)
return ic->programs[i];
}
}
return NULL;
}
int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
int wanted_stream_nb, int related_stream,
const AVCodec **decoder_ret, int flags)
{
int nb_streams = ic->nb_streams;
int ret = AVERROR_STREAM_NOT_FOUND;
int best_count = -1, best_multiframe = -1, best_disposition = -1;
int count, multiframe, disposition;
int64_t best_bitrate = -1;
int64_t bitrate;
unsigned *program = NULL;
const AVCodec *decoder = NULL, *best_decoder = NULL;
if (related_stream >= 0 && wanted_stream_nb < 0) {
AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
if (p) {
program = p->stream_index;
nb_streams = p->nb_stream_indexes;
}
}
for (unsigned i = 0; i < nb_streams; i++) {
int real_stream_index = program ? program[i] : i;
AVStream *st = ic->streams[real_stream_index];
AVCodecParameters *par = st->codecpar;
if (par->codec_type != type)
continue;
if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
continue;
if (type == AVMEDIA_TYPE_AUDIO && !(par->channels && par->sample_rate))
continue;
if (decoder_ret) {
decoder = ff_find_decoder(ic, st, par->codec_id);
if (!decoder) {
if (ret < 0)
ret = AVERROR_DECODER_NOT_FOUND;
continue;
}
}
disposition = !(st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED | AV_DISPOSITION_VISUAL_IMPAIRED))
+ !! (st->disposition & AV_DISPOSITION_DEFAULT);
count = ffstream(st)->codec_info_nb_frames;
bitrate = par->bit_rate;
multiframe = FFMIN(5, count);
if ((best_disposition > disposition) ||
(best_disposition == disposition && best_multiframe > multiframe) ||
(best_disposition == disposition && best_multiframe == multiframe && best_bitrate > bitrate) ||
(best_disposition == disposition && best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
continue;
best_disposition = disposition;
best_count = count;
best_bitrate = bitrate;
best_multiframe = multiframe;
ret = real_stream_index;
best_decoder = decoder;
if (program && i == nb_streams - 1 && ret < 0) {
program = NULL;
nb_streams = ic->nb_streams;
/* no related stream found, try again with everything */
i = 0;
}
}
if (decoder_ret)
*decoder_ret = best_decoder;
return ret;
}
/*******************************************************/
int av_read_play(AVFormatContext *s)
{
if (s->iformat->read_play)
return s->iformat->read_play(s);
if (s->pb)
return avio_pause(s->pb, 0);
return AVERROR(ENOSYS);
}
int av_read_pause(AVFormatContext *s)
{
if (s->iformat->read_pause)
return s->iformat->read_pause(s);
if (s->pb)
return avio_pause(s->pb, 1);
return AVERROR(ENOSYS);
}
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
{
int ret;
dst->id = src->id;
dst->time_base = src->time_base;
dst->nb_frames = src->nb_frames;
dst->disposition = src->disposition;
dst->sample_aspect_ratio = src->sample_aspect_ratio;
dst->avg_frame_rate = src->avg_frame_rate;
dst->r_frame_rate = src->r_frame_rate;
av_dict_free(&dst->metadata);
ret = av_dict_copy(&dst->metadata, src->metadata, 0);
if (ret < 0)
return ret;
ret = avcodec_parameters_copy(dst->codecpar, src->codecpar);
if (ret < 0)
return ret;
ret = ff_stream_side_data_copy(dst, src);
if (ret < 0)
return ret;
return 0;
}
int ff_stream_side_data_copy(AVStream *dst, const AVStream *src)
{
/* Free existing side data*/
for (int i = 0; i < dst->nb_side_data; i++)
av_free(dst->side_data[i].data);
av_freep(&dst->side_data);
dst->nb_side_data = 0;
/* Copy side data if present */
if (src->nb_side_data) {
dst->side_data = av_calloc(src->nb_side_data,
sizeof(*dst->side_data));
if (!dst->side_data)
return AVERROR(ENOMEM);
dst->nb_side_data = src->nb_side_data;
for (int i = 0; i < src->nb_side_data; i++) {
uint8_t *data = av_memdup(src->side_data[i].data,
src->side_data[i].size);
if (!data)
return AVERROR(ENOMEM);
dst->side_data[i].type = src->side_data[i].type;
dst->side_data[i].size = src->side_data[i].size;
dst->side_data[i].data = data;
}
}
return 0;
}
static void free_stream(AVStream **pst)
{
AVStream *st = *pst;
FFStream *const sti = ffstream(st);
if (!st)
return;
for (int i = 0; i < st->nb_side_data; i++)
av_freep(&st->side_data[i].data);
av_freep(&st->side_data);
if (st->attached_pic.data)
av_packet_unref(&st->attached_pic);
av_parser_close(sti->parser);
avcodec_free_context(&sti->avctx);
av_bsf_free(&sti->bsfc);
av_freep(&sti->priv_pts);
av_freep(&sti->index_entries);
av_freep(&sti->probe_data.buf);
av_bsf_free(&sti->extract_extradata.bsf);
if (sti->info) {
av_freep(&sti->info->duration_error);
av_freep(&sti->info);
}
av_dict_free(&st->metadata);
avcodec_parameters_free(&st->codecpar);
av_freep(&st->priv_data);
av_freep(pst);
}
void ff_free_stream(AVFormatContext *s, AVStream *st)
{
av_assert0(s->nb_streams>0);
av_assert0(s->streams[ s->nb_streams - 1 ] == st);
free_stream(&s->streams[ --s->nb_streams ]);
}
void avformat_free_context(AVFormatContext *s)
{
FFFormatContext *si;
if (!s)
return;
si = ffformatcontext(s);
if (s->oformat && s->oformat->deinit && si->initialized)
s->oformat->deinit(s);
av_opt_free(s);
if (s->iformat && s->iformat->priv_class && s->priv_data)
av_opt_free(s->priv_data);
if (s->oformat && s->oformat->priv_class && s->priv_data)
av_opt_free(s->priv_data);
for (unsigned i = 0; i < s->nb_streams; i++)
free_stream(&s->streams[i]);
s->nb_streams = 0;
for (unsigned i = 0; i < s->nb_programs; i++) {
av_dict_free(&s->programs[i]->metadata);
av_freep(&s->programs[i]->stream_index);
av_freep(&s->programs[i]);
}
s->nb_programs = 0;
av_freep(&s->programs);
av_freep(&s->priv_data);
while (s->nb_chapters--) {
av_dict_free(&s->chapters[s->nb_chapters]->metadata);
av_freep(&s->chapters[s->nb_chapters]);
}
av_freep(&s->chapters);
av_dict_free(&s->metadata);
av_dict_free(&si->id3v2_meta);
av_packet_free(&si->pkt);
av_packet_free(&si->parse_pkt);
av_freep(&s->streams);
ff_flush_packet_queue(s);
av_freep(&s->url);
av_free(s);
}
static const AVOption stream_options[] = {
{ "disposition", NULL, offsetof(AVStream, disposition), AV_OPT_TYPE_FLAGS, { .i64 = 0 },
.flags = AV_OPT_FLAG_ENCODING_PARAM, .unit = "disposition" },
{ "default", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEFAULT }, .unit = "disposition" },
{ "dub", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DUB }, .unit = "disposition" },
{ "original", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ORIGINAL }, .unit = "disposition" },
{ "comment", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_COMMENT }, .unit = "disposition" },
{ "lyrics", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_LYRICS }, .unit = "disposition" },
{ "karaoke", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_KARAOKE }, .unit = "disposition" },
{ "forced", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED }, .unit = "disposition" },
{ "hearing_impaired", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_HEARING_IMPAIRED }, .unit = "disposition" },
{ "visual_impaired", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_VISUAL_IMPAIRED }, .unit = "disposition" },
{ "clean_effects", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CLEAN_EFFECTS }, .unit = "disposition" },
{ "attached_pic", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_ATTACHED_PIC }, .unit = "disposition" },
{ "timed_thumbnails", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_TIMED_THUMBNAILS }, .unit = "disposition" },
{ "captions", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS }, .unit = "disposition" },
{ "descriptions", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS }, .unit = "disposition" },
{ "metadata", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA }, .unit = "disposition" },
{ "dependent", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DEPENDENT }, .unit = "disposition" },
{ "still_image", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_STILL_IMAGE }, .unit = "disposition" },
{ NULL }
};
static const AVClass stream_class = {
.class_name = "AVStream",
.item_name = av_default_item_name,
.version = LIBAVUTIL_VERSION_INT,
.option = stream_options,
};
const AVClass *av_stream_get_class(void)
{
return &stream_class;
}
AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
{
FFFormatContext *const si = ffformatcontext(s);
FFStream *sti;
AVStream *st;
AVStream **streams;
if (s->nb_streams >= s->max_streams) {
av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter"
" (%d), see the documentation if you wish to increase it\n",
s->max_streams);
return NULL;
}
streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
if (!streams)
return NULL;
s->streams = streams;
sti = av_mallocz(sizeof(*sti));
if (!sti)
return NULL;
st = &sti->pub;
#if FF_API_AVSTREAM_CLASS
st->av_class = &stream_class;
#endif
st->codecpar = avcodec_parameters_alloc();
if (!st->codecpar)
goto fail;
sti->avctx = avcodec_alloc_context3(NULL);
if (!sti->avctx)
goto fail;
if (s->iformat) {
sti->info = av_mallocz(sizeof(*sti->info));
if (!sti->info)
goto fail;
#if FF_API_R_FRAME_RATE
sti->info->last_dts = AV_NOPTS_VALUE;
#endif
sti->info->fps_first_dts = AV_NOPTS_VALUE;
sti->info->fps_last_dts = AV_NOPTS_VALUE;
/* default pts setting is MPEG-like */
avpriv_set_pts_info(st, 33, 1, 90000);
/* we set the current DTS to 0 so that formats without any timestamps
* but durations get some timestamps, formats with some unknown
* timestamps have their first few packets buffered and the
* timestamps corrected before they are returned to the user */
sti->cur_dts = RELATIVE_TS_BASE;
} else {
sti->cur_dts = AV_NOPTS_VALUE;
}
st->index = s->nb_streams;
st->start_time = AV_NOPTS_VALUE;
st->duration = AV_NOPTS_VALUE;
sti->first_dts = AV_NOPTS_VALUE;
sti->probe_packets = s->max_probe_packets;
sti->pts_wrap_reference = AV_NOPTS_VALUE;
sti->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
sti->last_IP_pts = AV_NOPTS_VALUE;
sti->last_dts_for_order_check = AV_NOPTS_VALUE;
for (int i = 0; i < MAX_REORDER_DELAY + 1; i++)
sti->pts_buffer[i] = AV_NOPTS_VALUE;
st->sample_aspect_ratio = (AVRational) { 0, 1 };
sti->inject_global_side_data = si->inject_global_side_data;
sti->need_context_update = 1;
s->streams[s->nb_streams++] = st;
return st;
fail:
free_stream(&st);
return NULL;
}
AVProgram *av_new_program(AVFormatContext *ac, int id)
{
AVProgram *program = NULL;
int ret;
av_log(ac, AV_LOG_TRACE, "new_program: id=0x%04x\n", id);
for (unsigned i = 0; i < ac->nb_programs; i++)
if (ac->programs[i]->id == id)
program = ac->programs[i];
if (!program) {
program = av_mallocz(sizeof(AVProgram));
if (!program)
return NULL;
ret = av_dynarray_add_nofree(&ac->programs, &ac->nb_programs, program);
if (ret < 0) {
av_free(program);
return NULL;
}
program->discard = AVDISCARD_NONE;
program->pmt_version = -1;
program->id = id;
program->pts_wrap_reference = AV_NOPTS_VALUE;
program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
program->start_time =
program->end_time = AV_NOPTS_VALUE;
}
return program;
}
AVChapter *avpriv_new_chapter(AVFormatContext *s, int64_t id, AVRational time_base,
int64_t start, int64_t end, const char *title)
{
FFFormatContext *const si = ffformatcontext(s);
AVChapter *chapter = NULL;
int ret;
if (end != AV_NOPTS_VALUE && start > end) {
av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
return NULL;
}
if (!s->nb_chapters) {
si->chapter_ids_monotonic = 1;
} else if (!si->chapter_ids_monotonic || s->chapters[s->nb_chapters-1]->id >= id) {
si->chapter_ids_monotonic = 0;
for (unsigned i = 0; i < s->nb_chapters; i++)
if (s->chapters[i]->id == id)
chapter = s->chapters[i];
}
if (!chapter) {
chapter = av_mallocz(sizeof(AVChapter));
if (!chapter)
return NULL;
ret = av_dynarray_add_nofree(&s->chapters, &s->nb_chapters, chapter);
if (ret < 0) {
av_free(chapter);
return NULL;
}
}
av_dict_set(&chapter->metadata, "title", title, 0);
chapter->id = id;
chapter->time_base = time_base;
chapter->start = start;
chapter->end = end;
return chapter;
}
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
{
AVProgram *program = NULL;
void *tmp;
if (idx >= ac->nb_streams) {
av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
return;
}
for (unsigned i = 0; i < ac->nb_programs; i++) {
if (ac->programs[i]->id != progid)
continue;
program = ac->programs[i];
for (unsigned j = 0; j < program->nb_stream_indexes; j++)
if (program->stream_index[j] == idx)
return;
tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
if (!tmp)
return;
program->stream_index = tmp;
program->stream_index[program->nb_stream_indexes++] = idx;
return;
}
}
uint64_t ff_ntp_time(void)
{
return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
}
uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us)
{
uint64_t ntp_ts, frac_part, sec;
uint32_t usec;
//current ntp time in seconds and micro seconds
sec = ntp_time_us / 1000000;
usec = ntp_time_us % 1000000;
//encoding in ntp timestamp format
frac_part = usec * 0xFFFFFFFFULL;
frac_part /= 1000000;
if (sec > 0xFFFFFFFFULL)
av_log(NULL, AV_LOG_WARNING, "NTP time format roll over detected\n");
ntp_ts = sec << 32;
ntp_ts |= frac_part;
return ntp_ts;
}
uint64_t ff_parse_ntp_time(uint64_t ntp_ts)
{
uint64_t sec = ntp_ts >> 32;
uint64_t frac_part = ntp_ts & 0xFFFFFFFFULL;
uint64_t usec = (frac_part * 1000000) / 0xFFFFFFFFULL;
return (sec * 1000000) + usec;
}
int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
{
const char *p;
char *q, buf1[20], c;
int nd, len, percentd_found;
q = buf;
p = path;
percentd_found = 0;
for (;;) {
c = *p++;
if (c == '\0')
break;
if (c == '%') {