mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
5576e93b0f
still return usable data after the underlying stream_t has EOF'ed. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18847 b3059339-0415-0410-9bf9-f77b7e298cf2
504 lines
16 KiB
C
504 lines
16 KiB
C
/*
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Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// #include <stdio.h>
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#include <stdlib.h>
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// #include <unistd.h>
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#include "config.h"
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#include "mp_msg.h"
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// #include "help_mp.h"
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#include "stream.h"
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#include "demuxer.h"
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#include "stheader.h"
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#ifdef USE_LIBAVFORMAT_SO
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#include <ffmpeg/avformat.h>
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#else
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#include "avformat.h"
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#include "avi.h"
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#endif
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#define PROBE_BUF_SIZE 2048
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extern char *audio_lang;
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typedef struct lavf_priv_t{
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AVInputFormat *avif;
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AVFormatContext *avfc;
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ByteIOContext pb;
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int audio_streams;
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int video_streams;
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int64_t last_pts;
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int astreams[MAX_A_STREAMS];
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}lavf_priv_t;
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extern void print_wave_header(WAVEFORMATEX *h, int verbose_level);
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extern void print_video_header(BITMAPINFOHEADER *h, int verbose_level);
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int64_t ff_gcd(int64_t a, int64_t b);
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static int mp_open(URLContext *h, const char *filename, int flags){
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return 0;
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}
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static int mp_read(URLContext *h, unsigned char *buf, int size){
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stream_t *stream = (stream_t*)h->priv_data;
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int ret;
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if(stream_eof(stream)) //needed?
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return -1;
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ret=stream_read(stream, buf, size);
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mp_msg(MSGT_HEADER,MSGL_DBG2,"%d=mp_read(%p, %p, %d), eof:%d\n", ret, h, buf, size, stream->eof);
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return ret;
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}
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static int mp_write(URLContext *h, unsigned char *buf, int size){
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return -1;
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}
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static offset_t mp_seek(URLContext *h, offset_t pos, int whence){
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stream_t *stream = (stream_t*)h->priv_data;
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mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %d, %d)\n", h, (int)pos, whence);
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if(whence == SEEK_CUR)
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pos +=stream_tell(stream);
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else if(whence == SEEK_END)
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pos += stream->end_pos;
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else if(whence != SEEK_SET)
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return -1;
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if(pos<stream->end_pos && stream->eof)
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stream_reset(stream);
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if(stream_seek(stream, pos)==0)
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return -1;
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return pos;
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}
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static int mp_close(URLContext *h){
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return 0;
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}
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static URLProtocol mp_protocol = {
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"mp",
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mp_open,
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mp_read,
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mp_write,
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mp_seek,
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mp_close,
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};
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static int lavf_check_file(demuxer_t *demuxer){
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AVProbeData avpd;
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uint8_t buf[PROBE_BUF_SIZE];
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lavf_priv_t *priv;
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if(!demuxer->priv)
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demuxer->priv=calloc(sizeof(lavf_priv_t),1);
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priv= demuxer->priv;
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av_register_all();
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if(stream_read(demuxer->stream, buf, PROBE_BUF_SIZE)!=PROBE_BUF_SIZE)
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return 0;
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avpd.filename= demuxer->stream->url;
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avpd.buf= buf;
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avpd.buf_size= PROBE_BUF_SIZE;
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priv->avif= av_probe_input_format(&avpd, 1);
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if(!priv->avif){
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mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: no clue about this gibberish!\n");
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return 0;
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}else
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mp_msg(MSGT_HEADER,MSGL_V,"LAVF_check: %s\n", priv->avif->long_name);
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return DEMUXER_TYPE_LAVF;
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}
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static demuxer_t* demux_open_lavf(demuxer_t *demuxer){
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AVFormatContext *avfc;
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AVFormatParameters ap;
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lavf_priv_t *priv= demuxer->priv;
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int i,g;
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char mp_filename[256]="mp:";
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memset(&ap, 0, sizeof(AVFormatParameters));
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stream_seek(demuxer->stream, 0);
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register_protocol(&mp_protocol);
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if(demuxer->stream->url)
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strncpy(mp_filename + 3, demuxer->stream->url, sizeof(mp_filename)-3);
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else
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strncpy(mp_filename + 3, "foobar.dummy", sizeof(mp_filename)-3);
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url_fopen(&priv->pb, mp_filename, URL_RDONLY);
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((URLContext*)(priv->pb.opaque))->priv_data= demuxer->stream;
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if(av_open_input_stream(&avfc, &priv->pb, mp_filename, priv->avif, &ap)<0){
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mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_open_input_stream() failed\n");
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return NULL;
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}
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priv->avfc= avfc;
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if(av_find_stream_info(avfc) < 0){
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mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF_header: av_find_stream_info() failed\n");
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return NULL;
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}
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if(avfc->title [0]) demux_info_add(demuxer, "name" , avfc->title );
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if(avfc->author [0]) demux_info_add(demuxer, "author" , avfc->author );
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if(avfc->copyright[0]) demux_info_add(demuxer, "copyright", avfc->copyright);
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if(avfc->comment [0]) demux_info_add(demuxer, "comments" , avfc->comment );
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if(avfc->album [0]) demux_info_add(demuxer, "album" , avfc->album );
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// if(avfc->year ) demux_info_add(demuxer, "year" , avfc->year );
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// if(avfc->track ) demux_info_add(demuxer, "track" , avfc->track );
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if(avfc->genre [0]) demux_info_add(demuxer, "genre" , avfc->genre );
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for(i=0; i<avfc->nb_streams; i++){
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AVStream *st= avfc->streams[i];
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#if LIBAVFORMAT_BUILD >= 4629
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AVCodecContext *codec= st->codec;
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#else
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AVCodecContext *codec= &st->codec;
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#endif
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switch(codec->codec_type){
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case CODEC_TYPE_AUDIO:{
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WAVEFORMATEX *wf= calloc(sizeof(WAVEFORMATEX) + codec->extradata_size, 1);
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if(priv->audio_streams >= MAX_A_STREAMS)
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break;
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sh_audio_t* sh_audio=new_sh_audio(demuxer, i);
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if(!sh_audio)
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break;
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priv->astreams[priv->audio_streams] = i;
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priv->audio_streams++;
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if(!codec->codec_tag)
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codec->codec_tag= codec_get_wav_tag(codec->codec_id);
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wf->wFormatTag= codec->codec_tag;
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wf->nChannels= codec->channels;
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wf->nSamplesPerSec= codec->sample_rate;
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wf->nAvgBytesPerSec= codec->bit_rate/8;
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wf->nBlockAlign= codec->block_align;
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wf->wBitsPerSample= codec->bits_per_sample;
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wf->cbSize= codec->extradata_size;
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if(codec->extradata_size){
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memcpy(
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wf + 1,
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codec->extradata,
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codec->extradata_size);
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}
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sh_audio->wf= wf;
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sh_audio->audio.dwSampleSize= codec->block_align;
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if(codec->frame_size && codec->sample_rate){
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sh_audio->audio.dwScale=codec->frame_size;
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sh_audio->audio.dwRate= codec->sample_rate;
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}else{
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sh_audio->audio.dwScale= codec->block_align ? codec->block_align*8 : 8;
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sh_audio->audio.dwRate = codec->bit_rate;
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}
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g= ff_gcd(sh_audio->audio.dwScale, sh_audio->audio.dwRate);
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sh_audio->audio.dwScale /= g;
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sh_audio->audio.dwRate /= g;
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// 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);
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sh_audio->ds= demuxer->audio;
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sh_audio->format= codec->codec_tag;
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sh_audio->channels= codec->channels;
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sh_audio->samplerate= codec->sample_rate;
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sh_audio->i_bps= codec->bit_rate/8;
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switch (codec->codec_id) {
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case CODEC_ID_PCM_S8:
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case CODEC_ID_PCM_U8:
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sh_audio->samplesize = 1;
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break;
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case CODEC_ID_PCM_S16LE:
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case CODEC_ID_PCM_S16BE:
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case CODEC_ID_PCM_U16LE:
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case CODEC_ID_PCM_U16BE:
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sh_audio->samplesize = 2;
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break;
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case CODEC_ID_PCM_ALAW:
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sh_audio->format = 0x6;
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break;
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case CODEC_ID_PCM_MULAW:
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sh_audio->format = 0x7;
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break;
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}
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if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf, MSGL_V);
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if((audio_lang && st->language[0] && !strncmp(audio_lang, st->language, 3))
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|| (demuxer->audio->id == i || demuxer->audio->id == -1)
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) {
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demuxer->audio->id = i;
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demuxer->audio->sh= demuxer->a_streams[i];
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}
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else
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st->discard= AVDISCARD_ALL;
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break;}
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case CODEC_TYPE_VIDEO:{
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BITMAPINFOHEADER *bih=calloc(sizeof(BITMAPINFOHEADER) + codec->extradata_size,1);
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sh_video_t* sh_video=new_sh_video(demuxer, i);
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priv->video_streams++;
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if(!codec->codec_tag)
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codec->codec_tag= codec_get_bmp_tag(codec->codec_id);
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bih->biSize= sizeof(BITMAPINFOHEADER) + codec->extradata_size;
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bih->biWidth= codec->width;
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bih->biHeight= codec->height;
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bih->biBitCount= codec->bits_per_sample;
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bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount/8;
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bih->biCompression= codec->codec_tag;
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sh_video->bih= bih;
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sh_video->disp_w= codec->width;
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sh_video->disp_h= codec->height;
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if (st->time_base.den) { /* if container has time_base, use that */
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sh_video->video.dwRate= st->time_base.den;
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sh_video->video.dwScale= st->time_base.num;
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} else {
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#if LIBAVFORMAT_BUILD >= 4624
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sh_video->video.dwRate= codec->time_base.den;
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sh_video->video.dwScale= codec->time_base.num;
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#else
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sh_video->video.dwRate= codec->frame_rate;
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sh_video->video.dwScale= codec->frame_rate_base;
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#endif
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}
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sh_video->fps=av_q2d(st->r_frame_rate);
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sh_video->frametime=1/av_q2d(st->r_frame_rate);
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sh_video->format = bih->biCompression;
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sh_video->aspect= codec->width * codec->sample_aspect_ratio.num
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/ (float)(codec->height * codec->sample_aspect_ratio.den);
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sh_video->i_bps= codec->bit_rate/8;
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mp_msg(MSGT_DEMUX,MSGL_DBG2,"aspect= %d*%d/(%d*%d)\n",
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codec->width, codec->sample_aspect_ratio.num,
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codec->height, codec->sample_aspect_ratio.den);
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sh_video->ds= demuxer->video;
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if(codec->extradata_size)
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memcpy(sh_video->bih + 1, codec->extradata, codec->extradata_size);
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if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
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/* short biPlanes;
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int biXPelsPerMeter;
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int biYPelsPerMeter;
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int biClrUsed;
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int biClrImportant;*/
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if(demuxer->video->id != i && demuxer->video->id != -1)
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st->discard= AVDISCARD_ALL;
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else{
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demuxer->video->id = i;
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demuxer->video->sh= demuxer->v_streams[i];
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}
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break;}
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default:
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st->discard= AVDISCARD_ALL;
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}
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}
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mp_msg(MSGT_HEADER,MSGL_V,"LAVF: %d audio and %d video streams found\n",priv->audio_streams,priv->video_streams);
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mp_msg(MSGT_HEADER,MSGL_V,"LAVF: build %d\n", LIBAVFORMAT_BUILD);
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if(!priv->audio_streams) demuxer->audio->id=-2; // nosound
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// else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
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if(!priv->video_streams){
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if(!priv->audio_streams){
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mp_msg(MSGT_HEADER,MSGL_ERR,"LAVF: no audio or video headers found - broken file?\n");
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return NULL;
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}
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demuxer->video->id=-2; // audio-only
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} //else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
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return demuxer;
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}
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static int demux_lavf_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
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lavf_priv_t *priv= demux->priv;
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AVPacket pkt;
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demux_packet_t *dp;
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demux_stream_t *ds;
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int id;
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mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_lavf_fill_buffer()\n");
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demux->filepos=stream_tell(demux->stream);
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if(av_read_frame(priv->avfc, &pkt) < 0)
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return 0;
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id= pkt.stream_index;
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if(id==demux->audio->id){
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// audio
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ds=demux->audio;
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if(!ds->sh){
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ds->sh=demux->a_streams[id];
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mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF audio ID = %d\n",ds->id);
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}
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} else if(id==demux->video->id){
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// video
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ds=demux->video;
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if(!ds->sh){
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ds->sh=demux->v_streams[id];
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mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected LAVF video ID = %d\n",ds->id);
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}
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} else {
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av_free_packet(&pkt);
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return 1;
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}
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if(0/*pkt.destruct == av_destruct_packet*/){
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//ok kids, dont try this at home :)
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dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
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dp->len=pkt.size;
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dp->next=NULL;
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dp->refcount=1;
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dp->master=NULL;
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dp->buffer=pkt.data;
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pkt.destruct= NULL;
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}else{
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dp=new_demux_packet(pkt.size);
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memcpy(dp->buffer, pkt.data, pkt.size);
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av_free_packet(&pkt);
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}
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if(pkt.pts != AV_NOPTS_VALUE){
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#if LIBAVFORMAT_BUILD >= 4624
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dp->pts=pkt.pts * av_q2d(priv->avfc->streams[id]->time_base);
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priv->last_pts= dp->pts * AV_TIME_BASE;
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#else
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priv->last_pts= pkt.pts;
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dp->pts=pkt.pts / (float)AV_TIME_BASE;
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#endif
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}
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dp->pos=demux->filepos;
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dp->flags= !!(pkt.flags&PKT_FLAG_KEY);
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// append packet to DS stream:
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ds_add_packet(ds,dp);
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return 1;
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}
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static void demux_seek_lavf(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags){
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lavf_priv_t *priv = demuxer->priv;
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mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_seek_lavf(%p, %f, %f, %d)\n", demuxer, rel_seek_secs, audio_delay, flags);
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#if LIBAVFORMAT_BUILD < 4619
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av_seek_frame(priv->avfc, -1, priv->last_pts + rel_seek_secs*AV_TIME_BASE);
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#else
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av_seek_frame(priv->avfc, -1, priv->last_pts + rel_seek_secs*AV_TIME_BASE, rel_seek_secs < 0 ? AVSEEK_FLAG_BACKWARD : 0);
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#endif
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}
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static int demux_lavf_control(demuxer_t *demuxer, int cmd, void *arg)
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{
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lavf_priv_t *priv = demuxer->priv;
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switch (cmd) {
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case DEMUXER_CTRL_GET_TIME_LENGTH:
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if (priv->avfc->duration == 0)
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return DEMUXER_CTRL_DONTKNOW;
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*((double *)arg) = (double)priv->avfc->duration / AV_TIME_BASE;
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return DEMUXER_CTRL_OK;
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case DEMUXER_CTRL_GET_PERCENT_POS:
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if (priv->avfc->duration == 0)
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return DEMUXER_CTRL_DONTKNOW;
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*((int *)arg) = (int)(priv->last_pts*100 / priv->avfc->duration);
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return DEMUXER_CTRL_OK;
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case DEMUXER_CTRL_SWITCH_AUDIO:
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{
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int id = *((int*)arg);
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int newid = -2;
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int i, curridx = -2;
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if(demuxer->audio->id == -2)
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return DEMUXER_CTRL_NOTIMPL;
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for(i = 0; i < priv->audio_streams; i++)
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{
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if(priv->astreams[i] == demuxer->audio->id) //current stream id
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{
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curridx = i;
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break;
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}
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}
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if(id < 0)
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{
|
|
i = (curridx + 1) % priv->audio_streams;
|
|
newid = priv->astreams[i];
|
|
}
|
|
else
|
|
{
|
|
for(i = 0; i < priv->audio_streams; i++)
|
|
{
|
|
if(priv->astreams[i] == id)
|
|
{
|
|
newid = id;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if(newid == -2 || i == curridx)
|
|
return DEMUXER_CTRL_NOTIMPL;
|
|
else
|
|
{
|
|
ds_free_packs(demuxer->audio);
|
|
priv->avfc->streams[demuxer->audio->id]->discard = AVDISCARD_ALL;
|
|
*((int*)arg) = demuxer->audio->id = newid;
|
|
priv->avfc->streams[newid]->discard = AVDISCARD_NONE;
|
|
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_close_input_file(priv->avfc); priv->avfc= NULL;
|
|
}
|
|
free(priv); demuxer->priv= NULL;
|
|
}
|
|
}
|
|
|
|
|
|
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
|
|
};
|
|
|