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mpv/libmpdemux/demux_lavf.c

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/*
* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// #include <stdio.h>
#include <stdlib.h>
// #include <unistd.h>
#include <limits.h>
#include <stdbool.h>
#include <string.h>
#include "config.h"
#include "options.h"
#include "mp_msg.h"
#include "av_opts.h"
#include "bstr.h"
#include "stream/stream.h"
#include "aviprint.h"
#include "demuxer.h"
#include "stheader.h"
#include "m_option.h"
#include "sub/sub.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
#include "libavutil/avutil.h"
#include "libavutil/avstring.h"
#include "libavcodec/opt.h"
#include "mp_taglists.h"
#define INITIAL_PROBE_SIZE STREAM_BUFFER_SIZE
#define SMALL_MAX_PROBE_SIZE (32 * 1024)
#define PROBE_BUF_SIZE (2*1024*1024)
const m_option_t lavfdopts_conf[] = {
OPT_INTRANGE("probesize", lavfdopts.probesize, 0, 32, INT_MAX),
OPT_STRING("format", lavfdopts.format, 0),
OPT_INTRANGE("analyzeduration", lavfdopts.analyzeduration, 0, 0, INT_MAX),
OPT_STRING("cryptokey", lavfdopts.cryptokey, 0),
OPT_STRING("o", lavfdopts.avopt, 0),
{NULL, NULL, 0, 0, 0, 0, NULL}
};
#define BIO_BUFFER_SIZE 32768
typedef struct lavf_priv {
AVInputFormat *avif;
AVFormatContext *avfc;
ByteIOContext *pb;
uint8_t buffer[BIO_BUFFER_SIZE];
int audio_streams;
int video_streams;
int sub_streams;
int64_t last_pts;
int astreams[MAX_A_STREAMS];
int vstreams[MAX_V_STREAMS];
int sstreams[MAX_S_STREAMS];
int cur_program;
int nb_streams_last;
bool internet_radio_hack;
bool use_dts;
bool seek_by_bytes;
int bitrate;
}lavf_priv_t;
static int mp_read(void *opaque, uint8_t *buf, int size) {
struct demuxer *demuxer = opaque;
struct stream *stream = demuxer->stream;
int ret;
ret=stream_read(stream, buf, size);
mp_msg(MSGT_HEADER,MSGL_DBG2,"%d=mp_read(%p, %p, %d), pos: %"PRId64", eof:%d\n",
ret, stream, buf, size, stream_tell(stream), stream->eof);
return ret;
}
static int64_t mp_seek(void *opaque, int64_t pos, int whence) {
struct demuxer *demuxer = opaque;
struct stream *stream = demuxer->stream;
int64_t current_pos;
mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %"PRId64", %d)\n", stream, pos, whence);
if(whence == SEEK_CUR)
pos +=stream_tell(stream);
else if(whence == SEEK_END && stream->end_pos > 0)
pos += stream->end_pos;
else if(whence == SEEK_SET)
pos += stream->start_pos;
else if(whence == AVSEEK_SIZE && stream->end_pos > 0)
return stream->end_pos - stream->start_pos;
else
return -1;
if(pos<0)
return -1;
current_pos = stream_tell(stream);
if(stream_seek(stream, pos)==0) {
stream_reset(stream);
stream_seek(stream, current_pos);
return -1;
}
return pos - stream->start_pos;
}
static int64_t mp_read_seek(void *opaque, int stream_idx, int64_t ts, int flags)
{
struct demuxer *demuxer = opaque;
struct stream *stream = demuxer->stream;
struct lavf_priv *priv = demuxer->priv;
AVStream *st = priv->avfc->streams[stream_idx];
double pts = (double)ts * st->time_base.num / st->time_base.den;
int ret = stream_control(stream, STREAM_CTRL_SEEK_TO_TIME, &pts);
if (ret < 0)
ret = AVERROR(ENOSYS);
return ret;
}
static void list_formats(void) {
mp_msg(MSGT_DEMUX, MSGL_INFO, "Available lavf input formats:\n");
AVInputFormat *fmt = NULL;
while (fmt = av_iformat_next(fmt))
mp_msg(MSGT_DEMUX, MSGL_INFO, "%15s : %s\n", fmt->name, fmt->long_name);
}
static int lavf_check_file(demuxer_t *demuxer){
struct MPOpts *opts = demuxer->opts;
struct lavfdopts *lavfdopts = &opts->lavfdopts;
AVProbeData avpd;
lavf_priv_t *priv;
int probe_data_size = 0;
int read_size = INITIAL_PROBE_SIZE;
int score;
if(!demuxer->priv)
demuxer->priv=calloc(sizeof(lavf_priv_t),1);
priv= demuxer->priv;
av_register_all();
char *format = lavfdopts->format;
if (!format)
format = demuxer->stream->lavf_type;
if (format) {
if (strcmp(format, "help") == 0) {
list_formats();
return 0;
}
priv->avif = av_find_input_format(format);
if (!priv->avif) {
mp_msg(MSGT_DEMUX, MSGL_FATAL, "Unknown lavf format %s\n", format);
return 0;
}
mp_msg(MSGT_DEMUX,MSGL_INFO,"Forced lavf %s demuxer\n", priv->avif->long_name);
return DEMUXER_TYPE_LAVF;
}
avpd.buf = av_mallocz(FFMAX(BIO_BUFFER_SIZE, PROBE_BUF_SIZE) +
FF_INPUT_BUFFER_PADDING_SIZE);
do {
read_size = stream_read(demuxer->stream, avpd.buf + probe_data_size, read_size);
if(read_size < 0) {
av_free(avpd.buf);
return 0;
}
probe_data_size += read_size;
avpd.filename= demuxer->stream->url;
if (!avpd.filename) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "Stream url is not set!\n");
avpd.filename = "";
}
if (!strncmp(avpd.filename, "ffmpeg://", 9))
avpd.filename += 9;
avpd.buf_size= probe_data_size;
score = 0;
priv->avif= av_probe_input_format2(&avpd, probe_data_size > 0, &score);
read_size = FFMIN(2*read_size, PROBE_BUF_SIZE - probe_data_size);
} while ((demuxer->desc->type != DEMUXER_TYPE_LAVF_PREFERRED ||
probe_data_size < SMALL_MAX_PROBE_SIZE) &&
score <= AVPROBE_SCORE_MAX / 4 &&
read_size > 0 && probe_data_size < PROBE_BUF_SIZE);
av_free(avpd.buf);
if (!priv->avif || score <= AVPROBE_SCORE_MAX / 4) {
mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
return 0;
}else
mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
demuxer->filetype = priv->avif->long_name;
if (!demuxer->filetype)
demuxer->filetype = priv->avif->name;
return DEMUXER_TYPE_LAVF;
}
static bool matches_avinputformat_name(struct lavf_priv *priv,
const char *name)
{
const char *avifname = priv->avif->name;
while (1) {
const char *next = strchr(avifname, ',');
if (!next)
return !strcmp(avifname, name);
int len = next - avifname;
if (len == strlen(name) && !memcmp(avifname, name, len))
return true;
avifname = next + 1;
}
}
/* formats for which an internal demuxer is preferred */
static const char * const preferred_internal[] = {
/* lavf Matroska demuxer doesn't support ordered chapters and fails
* for more files */
"matroska",
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(52, 99, 0)
/* Seeking doesn't work with lavf FLAC demuxer in FFmpeg versions
* without a FLAC parser. In principle this could use a runtime check to
* switch if a shared library is updated. */
"flac",
#endif
/* lavf gives neither pts nor dts for some video frames in .rm */
"rm",
NULL
};
static int lavf_check_preferred_file(demuxer_t *demuxer){
if (lavf_check_file(demuxer)) {
const char * const *p;
lavf_priv_t *priv = demuxer->priv;
for (p = preferred_internal; *p; p++)
if (matches_avinputformat_name(priv, *p))
return 0;
return DEMUXER_TYPE_LAVF_PREFERRED;
}
return 0;
}
static uint8_t char2int(char c) {
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
if (c >= 'A' && c <= 'F') return c - 'A' + 10;
return 0;
}
static void parse_cryptokey(AVFormatContext *avfc, const char *str) {
int len = strlen(str) / 2;
uint8_t *key = av_mallocz(len);
int i;
avfc->keylen = len;
avfc->key = key;
for (i = 0; i < len; i++, str += 2)
*key++ = (char2int(str[0]) << 4) | char2int(str[1]);
}
static void handle_stream(demuxer_t *demuxer, AVFormatContext *avfc, int i) {
lavf_priv_t *priv= demuxer->priv;
AVStream *st= avfc->streams[i];
AVCodecContext *codec= st->codec;
char *stream_type = NULL;
int stream_id;
AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
AVMetadataTag *title= av_metadata_get(st->metadata, "title", NULL, 0);
int g, override_tag = mp_av_codec_get_tag(mp_codecid_override_taglists,
codec->codec_id);
// For some formats (like PCM) always trust CODEC_ID_* more than codec_tag
if (override_tag)
codec->codec_tag = override_tag;
switch(codec->codec_type){
case CODEC_TYPE_AUDIO:{
WAVEFORMATEX *wf;
sh_audio_t* sh_audio;
sh_audio = new_sh_audio_aid(demuxer, i, priv->audio_streams);
if(!sh_audio)
break;
stream_type = "audio";
priv->astreams[priv->audio_streams] = i;
wf= calloc(sizeof(*wf) + codec->extradata_size, 1);
// mp4a tag is used for all mp4 files no matter what they actually contain
if(codec->codec_tag == MKTAG('m', 'p', '4', 'a'))
codec->codec_tag= 0;
if(!codec->codec_tag)
codec->codec_tag= mp_av_codec_get_tag(mp_wav_taglists, codec->codec_id);
wf->wFormatTag= codec->codec_tag;
wf->nChannels= codec->channels;
wf->nSamplesPerSec= codec->sample_rate;
wf->nAvgBytesPerSec= codec->bit_rate/8;
wf->nBlockAlign= codec->block_align ? codec->block_align : 1;
wf->wBitsPerSample= codec->bits_per_coded_sample;
wf->cbSize= codec->extradata_size;
if(codec->extradata_size)
memcpy(wf + 1, codec->extradata, codec->extradata_size);
sh_audio->wf= wf;
sh_audio->audio.dwSampleSize= codec->block_align;
if(codec->frame_size && codec->sample_rate){
sh_audio->audio.dwScale=codec->frame_size;
sh_audio->audio.dwRate= codec->sample_rate;
}else{
sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
sh_audio->audio.dwRate = codec->bit_rate;
}
g= av_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
sh_audio->audio.dwScale /= g;
sh_audio->audio.dwRate /= g;
// printf("sca:%d rat:%d fs:%d sr:%d ba:%d\n", sh_audio->audio.dwScale, sh_audio->audio.dwRate, codec->frame_size, codec->sample_rate, codec->block_align);
sh_audio->ds= demuxer->audio;
sh_audio->format= codec->codec_tag;
sh_audio->channels= codec->channels;
sh_audio->samplerate= codec->sample_rate;
sh_audio->i_bps= codec->bit_rate/8;
switch (codec->codec_id) {
case CODEC_ID_PCM_S8:
case CODEC_ID_PCM_U8:
sh_audio->samplesize = 1;
break;
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_U16LE:
case CODEC_ID_PCM_U16BE:
sh_audio->samplesize = 2;
break;
case CODEC_ID_PCM_ALAW:
sh_audio->format = 0x6;
break;
case CODEC_ID_PCM_MULAW:
sh_audio->format = 0x7;
break;
}
if (title && title->value)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_NAME=%s\n", priv->audio_streams, title->value);
if (lang && lang->value) {
sh_audio->lang = strdup(lang->value);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", priv->audio_streams, sh_audio->lang);
}
if (st->disposition & AV_DISPOSITION_DEFAULT)
sh_audio->default_track = 1;
if(mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
// select the first audio stream
if (!demuxer->audio->sh) {
demuxer->audio->id = i;
demuxer->audio->sh= demuxer->a_streams[i];
} else
st->discard= AVDISCARD_ALL;
stream_id = priv->audio_streams++;
break;
}
case CODEC_TYPE_VIDEO:{
sh_video_t* sh_video;
BITMAPINFOHEADER *bih;
sh_video=new_sh_video_vid(demuxer, i, priv->video_streams);
if(!sh_video) break;
stream_type = "video";
priv->vstreams[priv->video_streams] = i;
bih=calloc(sizeof(*bih) + codec->extradata_size,1);
if(codec->codec_id == CODEC_ID_RAWVIDEO) {
switch (codec->pix_fmt) {
case PIX_FMT_RGB24:
codec->codec_tag= MKTAG(24, 'B', 'G', 'R');
case PIX_FMT_BGR24:
codec->codec_tag= MKTAG(24, 'R', 'G', 'B');
}
}
if(!codec->codec_tag)
codec->codec_tag= mp_av_codec_get_tag(mp_bmp_taglists, codec->codec_id);
bih->biSize= sizeof(*bih) + codec->extradata_size;
bih->biWidth= codec->width;
bih->biHeight= codec->height;
bih->biBitCount= codec->bits_per_coded_sample;
bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
bih->biCompression= codec->codec_tag;
sh_video->bih= bih;
sh_video->disp_w= codec->width;
sh_video->disp_h= codec->height;
if (st->time_base.den) { /* if container has time_base, use that */
sh_video->video.dwRate= st->time_base.den;
sh_video->video.dwScale= st->time_base.num;
} else {
sh_video->video.dwRate= codec->time_base.den;
sh_video->video.dwScale= codec->time_base.num;
}
sh_video->fps=av_q2d(st->r_frame_rate);
sh_video->frametime=1/av_q2d(st->r_frame_rate);
sh_video->format=bih->biCompression;
if(st->sample_aspect_ratio.num)
sh_video->aspect = codec->width * st->sample_aspect_ratio.num
/ (float)(codec->height * st->sample_aspect_ratio.den);
else
sh_video->aspect=codec->width * codec->sample_aspect_ratio.num
/ (float)(codec->height * codec->sample_aspect_ratio.den);
sh_video->i_bps=codec->bit_rate/8;
if (title && title->value)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VID_%d_NAME=%s\n", priv->video_streams, title->value);
mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
codec->width, codec->sample_aspect_ratio.num,
codec->height, codec->sample_aspect_ratio.den);
sh_video->ds= demuxer->video;
if(codec->extradata_size)
memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
/*
short biPlanes;
int biXPelsPerMeter;
int biYPelsPerMeter;
int biClrUsed;
int biClrImportant;
*/
if(demuxer->video->id != i && demuxer->video->id != -1)
st->discard= AVDISCARD_ALL;
else{
demuxer->video->id = i;
demuxer->video->sh= demuxer->v_streams[i];
}
stream_id = priv->video_streams++;
break;
}
case CODEC_TYPE_SUBTITLE:{
sh_sub_t* sh_sub;
char type;
/* only support text subtitles for now */
if(codec->codec_id == CODEC_ID_TEXT)
type = 't';
else if(codec->codec_id == CODEC_ID_MOV_TEXT)
type = 'm';
else if(codec->codec_id == CODEC_ID_SSA)
type = 'a';
else if(codec->codec_id == CODEC_ID_DVD_SUBTITLE)
type = 'v';
else if(codec->codec_id == CODEC_ID_XSUB)
type = 'x';
else if(codec->codec_id == CODEC_ID_DVB_SUBTITLE)
type = 'b';
else if(codec->codec_id == CODEC_ID_DVB_TELETEXT)
type = 'd';
else if(codec->codec_id == CODEC_ID_HDMV_PGS_SUBTITLE)
type = 'p';
else
break;
sh_sub = new_sh_sub_sid(demuxer, i, priv->sub_streams);
if(!sh_sub) break;
stream_type = "subtitle";
priv->sstreams[priv->sub_streams] = i;
sh_sub->type = type;
if (codec->extradata_size) {
sh_sub->extradata = malloc(codec->extradata_size);
memcpy(sh_sub->extradata, codec->extradata, codec->extradata_size);
sh_sub->extradata_len = codec->extradata_size;
}
if (title && title->value)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_NAME=%s\n", priv->sub_streams, title->value);
if (lang && lang->value) {
sh_sub->lang = strdup(lang->value);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", priv->sub_streams, sh_sub->lang);
}
if (st->disposition & AV_DISPOSITION_DEFAULT)
sh_sub->default_track = 1;
stream_id = priv->sub_streams++;
break;
}
case CODEC_TYPE_ATTACHMENT:{
if (st->codec->codec_id == CODEC_ID_TTF)
demuxer_add_attachment(demuxer, BSTR(st->filename),
BSTR("application/x-truetype-font"),
(struct bstr){codec->extradata,
codec->extradata_size});
break;
}
default:
st->discard= AVDISCARD_ALL;
}
if (stream_type) {
AVCodec *avc = avcodec_find_decoder(codec->codec_id);
const char *codec_name = avc ? avc->name : "unknown";
if (!avc && *stream_type == 's' && demuxer->s_streams[stream_id])
codec_name = sh_sub_type2str(((sh_sub_t *)demuxer->s_streams[stream_id])->type);
mp_msg(MSGT_DEMUX, MSGL_INFO, "[lavf] stream %d: %s (%s), -%cid %d", i, stream_type, codec_name, *stream_type, stream_id);
if (lang && lang->value && *stream_type != 'v')
mp_msg(MSGT_DEMUX, MSGL_INFO, ", -%clang %s", *stream_type, lang->value);
if (title && title->value)
mp_msg(MSGT_DEMUX, MSGL_INFO, ", %s", title->value);
mp_msg(MSGT_DEMUX, MSGL_INFO, "\n");
}
}
static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
struct MPOpts *opts = demuxer->opts;
struct lavfdopts *lavfdopts = &opts->lavfdopts;
AVFormatContext *avfc;
AVFormatParameters ap;
const AVOption *opt;
AVMetadataTag *t = NULL;
lavf_priv_t *priv= demuxer->priv;
int i;
char mp_filename[256]="mp:";
memset(&ap, 0, sizeof(AVFormatParameters));
stream_seek(demuxer->stream, 0);
avfc = avformat_alloc_context();
if (lavfdopts->cryptokey)
parse_cryptokey(avfc, lavfdopts->cryptokey);
if (matches_avinputformat_name(priv, "avi")) {
/* for avi libavformat returns the avi timestamps in .dts,
* some made-up stuff that's not really pts in .pts */
priv->use_dts = true;
demuxer->timestamp_type = TIMESTAMP_TYPE_SORT;
} else {
if (opts->user_correct_pts != 0)
avfc->flags |= AVFMT_FLAG_GENPTS;
}
if (index_mode == 0)
avfc->flags |= AVFMT_FLAG_IGNIDX;
ap.prealloced_context = 1;
if (lavfdopts->probesize) {
opt = av_set_int(avfc, "probesize", lavfdopts->probesize);
if(!opt) mp_msg(MSGT_HEADER,MSGL_ERR, "demux_lavf, couldn't set option probesize to %u\n", lavfdopts->probesize);
}
if (lavfdopts->analyzeduration) {
opt = av_set_int(avfc, "analyzeduration",
lavfdopts->analyzeduration * AV_TIME_BASE);
if (!opt)
mp_msg(MSGT_HEADER, MSGL_ERR, "demux_lavf, couldn't set option "
"analyzeduration to %u\n", lavfdopts->analyzeduration);
}
if (lavfdopts->avopt){
if(parse_avopts(avfc, lavfdopts->avopt) < 0){
mp_msg(MSGT_HEADER,MSGL_ERR, "Your options /%s/ look like gibberish to me pal\n", lavfdopts->avopt);
return NULL;
}
}
if(demuxer->stream->url) {
if (!strncmp(demuxer->stream->url, "ffmpeg://rtsp:", 14))
av_strlcpy(mp_filename, demuxer->stream->url + 9, sizeof(mp_filename));
else
av_strlcat(mp_filename, demuxer->stream->url, sizeof(mp_filename));
} else
av_strlcat(mp_filename, "foobar.dummy", sizeof(mp_filename));
priv->pb = av_alloc_put_byte(priv->buffer, BIO_BUFFER_SIZE, 0,
demuxer, mp_read, NULL, mp_seek);
priv->pb->read_seek = mp_read_seek;
priv->pb->is_streamed = !demuxer->stream->end_pos || (demuxer->stream->flags & MP_STREAM_SEEK) != MP_STREAM_SEEK;
if(av_open_input_stream(&avfc, priv->pb, mp_filename, priv->avif, &ap)<0){
mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
return NULL;
}
priv->avfc= avfc;
if(av_find_stream_info(avfc) < 0){
mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
return NULL;
}
/* Add metadata. */
av_metadata_conv(avfc, NULL, avfc->iformat->metadata_conv);
while((t = av_metadata_get(avfc->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
demux_info_add(demuxer, t->key, t->value);
for(i=0; i < avfc->nb_chapters; i++) {
AVChapter *c = avfc->chapters[i];
uint64_t start = av_rescale_q(c->start, c->time_base, (AVRational){1,1000000000});
uint64_t end = av_rescale_q(c->end, c->time_base, (AVRational){1,1000000000});
t = av_metadata_get(c->metadata, "title", NULL, 0);
demuxer_add_chapter(demuxer, t ? BSTR(t->value) : BSTR(NULL), start, end);
}
for(i=0; i<avfc->nb_streams; i++)
handle_stream(demuxer, avfc, i);
priv->nb_streams_last = avfc->nb_streams;
if(avfc->nb_programs) {
int p;
for (p = 0; p < avfc->nb_programs; p++) {
AVProgram *program = avfc->programs[p];
t = av_metadata_get(program->metadata, "title", NULL, 0);
mp_msg(MSGT_HEADER,MSGL_INFO,"LAVF: Program %d %s\n", program->id, t ? t->value : "");
mp_msg(MSGT_IDENTIFY, MSGL_V, "PROGRAM_ID=%d\n", program->id);
}
}
mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
if(!priv->audio_streams) demuxer->audio->id=-2; // nosound
// else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
if(!priv->video_streams){
if(!priv->audio_streams){
mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
return NULL;
}
demuxer->video->id=-2; // audio-only
} //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
/* libavformat sets bitrate for mpeg based on pts at start and end
* of file, which fails for files with pts resets. So calculate our
* own bitrate estimate. */
if (priv->avif->flags & AVFMT_TS_DISCONT) {
for (int i = 0; i < avfc->nb_streams; i++)
priv->bitrate += avfc->streams[i]->codec->bit_rate;
/* pts-based is more accurate if there are no resets; try to make
* a somewhat reasonable guess */
if (!avfc->duration || avfc->duration == AV_NOPTS_VALUE
|| priv->bitrate && (avfc->bit_rate < priv->bitrate / 2
|| avfc->bit_rate > priv->bitrate * 2))
priv->seek_by_bytes = true;
if (!priv->bitrate)
priv->bitrate = 1440000;
}
demuxer->accurate_seek = !priv->seek_by_bytes;
return demuxer;
}
static void check_internet_radio_hack(struct demuxer *demuxer)
{
struct lavf_priv *priv = demuxer->priv;
struct AVFormatContext *avfc = priv->avfc;
if (!matches_avinputformat_name(priv, "ogg"))
return;
if (priv->nb_streams_last == avfc->nb_streams)
return;
if (avfc->nb_streams - priv->nb_streams_last == 1
&& priv->video_streams == 0 && priv->sub_streams == 0
&& demuxer->a_streams[priv->audio_streams-1]->format == 0x566f // vorbis
&& (priv->audio_streams == 2 || priv->internet_radio_hack)
&& demuxer->a_streams[0]->format == 0x566f) {
// extradata match could be checked but would require parsing
// headers, as the comment section will vary
if (!priv->internet_radio_hack) {
mp_msg(MSGT_DEMUX, MSGL_V,
"[lavf] enabling internet ogg radio hack\n");
#if LIBAVFORMAT_VERSION_MAJOR < 53
mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[lavf] This looks like an "
"internet radio ogg stream with track changes.\n"
"Playback will likely fail after %d track changes "
"due to libavformat limitations.\n"
"You may be able to work around that limitation by "
"using -demuxer ogg.\n", MAX_STREAMS);
#endif
}
#if LIBAVFORMAT_VERSION_MAJOR < 53
if (avfc->nb_streams == MAX_STREAMS) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[lavf] This is the %dth "
"track.\nPlayback will likely fail at the next change.\n"
"You may be able to work around this limitation by "
"using -demuxer ogg.\n", MAX_STREAMS);
}
#endif
priv->internet_radio_hack = true;
// use new per-track metadata as global metadata
AVMetadataTag *t = NULL;
AVStream *stream = avfc->streams[avfc->nb_streams - 1];
while ((t = av_metadata_get(stream->metadata, "", t,
AV_METADATA_IGNORE_SUFFIX)))
demux_info_add(demuxer, t->key, t->value);
} else {
if (priv->internet_radio_hack)
mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[lavf] Internet radio ogg hack "
"was enabled, but stream characteristics changed.\n"
"This may or may not work.\n");
priv->internet_radio_hack = false;
}
}
static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
lavf_priv_t *priv= demux->priv;
AVPacket pkt;
demux_packet_t *dp;
demux_stream_t *ds;
int id;
mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
demux->filepos=stream_tell(demux->stream);
if(av_read_frame(priv->avfc, &pkt) < 0)
return 0;
// handle any new streams that might have been added
for (id = priv->nb_streams_last; id < priv->avfc->nb_streams; id++)
handle_stream(demux, priv->avfc, id);
check_internet_radio_hack(demux);
priv->nb_streams_last = priv->avfc->nb_streams;
id= pkt.stream_index;
if (id == demux->audio->id || priv->internet_radio_hack) {
// audio
ds=demux->audio;
if(!ds->sh){
ds->sh=demux->a_streams[id];
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
}
} else if(id==demux->video->id){
// video
ds=demux->video;
if(!ds->sh){
ds->sh=demux->v_streams[id];
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
}
} else if(id==demux->sub->id){
// subtitle
ds=demux->sub;
sub_utf8=1;
} else {
av_free_packet(&pkt);
return 1;
}
if(0/*pkt.destruct == av_destruct_packet*/){
//ok kids, dont try this at home :)
dp=malloc(sizeof(demux_packet_t));
dp->len=pkt.size;
dp->next=NULL;
dp->refcount=1;
dp->master=NULL;
dp->buffer=pkt.data;
pkt.destruct= NULL;
}else{
dp=new_demux_packet(pkt.size);
memcpy(dp->buffer, pkt.data, pkt.size);
av_free_packet(&pkt);
}
int64_t ts = priv->use_dts ? pkt.dts : pkt.pts;
if(ts != AV_NOPTS_VALUE){
dp->pts = ts * av_q2d(priv->avfc->streams[id]->time_base);
priv->last_pts= dp->pts * AV_TIME_BASE;
// always set duration for subtitles, even if PKT_FLAG_KEY is not set,
// otherwise they will stay on screen to long if e.g. ASS is demuxed from mkv
if((ds == demux->sub || (pkt.flags & PKT_FLAG_KEY)) &&
pkt.convergence_duration > 0)
dp->duration = pkt.convergence_duration * av_q2d(priv->avfc->streams[id]->time_base);
}
dp->pos=demux->filepos;
dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
// append packet to DS stream:
ds_add_packet(ds,dp);
return 1;
}
static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
lavf_priv_t *priv = demuxer->priv;
int avsflags = 0;
mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
if (priv->seek_by_bytes) {
int64_t pos = demuxer->filepos;
rel_seek_secs *= priv->bitrate / 8;
pos += rel_seek_secs;
av_seek_frame(priv->avfc, -1, pos, AVSEEK_FLAG_BYTE);
return;
}
if (flags & SEEK_ABSOLUTE) {
priv->last_pts = 0;
} else {
if (rel_seek_secs < 0) avsflags = AVSEEK_FLAG_BACKWARD;
}
if (flags & SEEK_FORWARD)
avsflags = 0;
else if (flags & SEEK_BACKWARD)
avsflags = AVSEEK_FLAG_BACKWARD;
if (flags & SEEK_FACTOR) {
if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
return;
priv->last_pts += rel_seek_secs * priv->avfc->duration;
} else {
priv->last_pts += rel_seek_secs * AV_TIME_BASE;
}
if (av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags) < 0) {
avsflags ^= AVSEEK_FLAG_BACKWARD;
av_seek_frame(priv->avfc, -1, priv->last_pts, avsflags);
}
}
static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
{
lavf_priv_t *priv = demuxer->priv;
switch (cmd) {
case DEMUXER_CTRL_CORRECT_PTS:
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_GET_TIME_LENGTH:
if (priv->seek_by_bytes) {
/* Our bitrate estimate may be better than would be used in
* otherwise similar fallback code at higher level */
if (demuxer->movi_end <= 0)
return DEMUXER_CTRL_DONTKNOW;
*(double *)arg = (demuxer->movi_end - demuxer->movi_start) * 8 /
priv->bitrate;
return DEMUXER_CTRL_GUESS;
}
if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
return DEMUXER_CTRL_DONTKNOW;
*((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_GET_PERCENT_POS:
if (priv->seek_by_bytes)
return DEMUXER_CTRL_DONTKNOW; // let it use the fallback code
if (priv->avfc->duration == 0 || priv->avfc->duration == AV_NOPTS_VALUE)
return DEMUXER_CTRL_DONTKNOW;
*((int *)arg) = (int)((priv->last_pts - priv->avfc->start_time)*100 / priv->avfc->duration);
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_SWITCH_AUDIO:
case DEMUXER_CTRL_SWITCH_VIDEO:
{
int id = *((int*)arg);
int newid = -2;
int i, curridx = -1;
int nstreams, *pstreams;
demux_stream_t *ds;
if(cmd == DEMUXER_CTRL_SWITCH_VIDEO)
{
ds = demuxer->video;
nstreams = priv->video_streams;
pstreams = priv->vstreams;
}
else
{
ds = demuxer->audio;
nstreams = priv->audio_streams;
pstreams = priv->astreams;
}
for(i = 0; i < nstreams; i++)
{
if(pstreams[i] == ds->id) //current stream id
{
curridx = i;
break;
}
}
if(id == -2) { // no sound
i = -1;
} else if(id == -1) { // next track
i = (curridx + 2) % (nstreams + 1) - 1;
if (i >= 0)
newid = pstreams[i];
}
else // select track by id
{
if (id >= 0 && id < nstreams) {
i = id;
newid = pstreams[i];
}
}
if (i == curridx) {
*(int *) arg = curridx;
return DEMUXER_CTRL_OK;
} else {
ds_free_packs(ds);
if(ds->id >= 0)
priv->avfc->streams[ds->id]->discard = AVDISCARD_ALL;
ds->id = newid;
*(int *) arg = i < 0 ? -2 : i;
if(newid >= 0)
priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
return DEMUXER_CTRL_OK;
}
}
case DEMUXER_CTRL_IDENTIFY_PROGRAM:
{
demux_program_t *prog = arg;
AVProgram *program;
int p, i;
int start;
prog->vid = prog->aid = prog->sid = -2; //no audio and no video by default
if(priv->avfc->nb_programs < 1)
return DEMUXER_CTRL_DONTKNOW;
if(prog->progid == -1)
{
p = 0;
while(p<priv->avfc->nb_programs && priv->avfc->programs[p]->id != priv->cur_program)
p++;
p = (p + 1) % priv->avfc->nb_programs;
}
else
{
for(i=0; i<priv->avfc->nb_programs; i++)
if(priv->avfc->programs[i]->id == prog->progid)
break;
if(i==priv->avfc->nb_programs)
return DEMUXER_CTRL_DONTKNOW;
p = i;
}
start = p;
redo:
program = priv->avfc->programs[p];
for(i=0; i<program->nb_stream_indexes; i++)
{
switch(priv->avfc->streams[program->stream_index[i]]->codec->codec_type)
{
case CODEC_TYPE_VIDEO:
if(prog->vid == -2)
prog->vid = program->stream_index[i];
break;
case CODEC_TYPE_AUDIO:
if(prog->aid == -2)
prog->aid = program->stream_index[i];
break;
case CODEC_TYPE_SUBTITLE:
if(prog->sid == -2 && priv->avfc->streams[program->stream_index[i]]->codec->codec_id == CODEC_ID_TEXT)
prog->sid = program->stream_index[i];
break;
}
}
if (prog->aid >= 0 && prog->aid < MAX_A_STREAMS &&
demuxer->a_streams[prog->aid]) {
sh_audio_t *sh = demuxer->a_streams[prog->aid];
prog->aid = sh->aid;
} else
prog->aid = -2;
if (prog->vid >= 0 && prog->vid < MAX_V_STREAMS &&
demuxer->v_streams[prog->vid]) {
sh_video_t *sh = demuxer->v_streams[prog->vid];
prog->vid = sh->vid;
} else
prog->vid = -2;
if(prog->progid == -1 && prog->vid == -2 && prog->aid == -2)
{
p = (p + 1) % priv->avfc->nb_programs;
if (p == start)
return DEMUXER_CTRL_DONTKNOW;
goto redo;
}
priv->cur_program = prog->progid = program->id;
return DEMUXER_CTRL_OK;
}
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
static void demux_close_lavf(demuxer_t *demuxer)
{
lavf_priv_t* priv = demuxer->priv;
if (priv){
if(priv->avfc)
{
av_freep(&priv->avfc->key);
av_close_input_stream(priv->avfc);
}
av_freep(&priv->pb);
free(priv); demuxer->priv= NULL;
}
}
const demuxer_desc_t demuxer_desc_lavf = {
"libavformat demuxer",
"lavf",
"libavformat",
"Michael Niedermayer",
"supports many formats, requires libavformat",
DEMUXER_TYPE_LAVF,
0, // Check after other demuxer
lavf_check_file,
demux_lavf_fill_buffer,
demux_open_lavf,
demux_close_lavf,
demux_seek_lavf,
demux_lavf_control
};
const demuxer_desc_t demuxer_desc_lavf_preferred = {
"libavformat preferred demuxer",
"lavfpref",
"libavformat",
"Michael Niedermayer",
"supports many formats, requires libavformat",
DEMUXER_TYPE_LAVF_PREFERRED,
1,
lavf_check_preferred_file,
demux_lavf_fill_buffer,
demux_open_lavf,
demux_close_lavf,
demux_seek_lavf,
demux_lavf_control
};
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