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mpv/libmpdemux/demuxer.c

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//=================== DEMUXER v2.5 =========================
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
void free_demuxer_stream(demux_stream_t *ds){
ds_free_packs(ds);
free(ds);
}
demux_stream_t* new_demuxer_stream(struct demuxer_st *demuxer,int id){
demux_stream_t* ds=malloc(sizeof(demux_stream_t));
ds->buffer_pos=ds->buffer_size=0;
ds->buffer=NULL;
ds->pts=0;
ds->pts_bytes=0;
ds->eof=0;
ds->pos=0;
ds->dpos=0;
ds->pack_no=0;
//---------------
ds->packs=0;
ds->bytes=0;
ds->first=ds->last=NULL;
ds->id=id;
ds->demuxer=demuxer;
//----------------
ds->asf_seq=-1;
ds->asf_packet=NULL;
//----------------
ds->ss_mul=ds->ss_div=1;
//----------------
ds->sh=NULL;
return ds;
}
demuxer_t* new_demuxer(stream_t *stream,int type,int a_id,int v_id,int s_id){
demuxer_t *d=malloc(sizeof(demuxer_t));
memset(d,0,sizeof(demuxer_t));
d->stream=stream;
d->movi_start=stream->start_pos;
d->movi_end=stream->end_pos;
d->seekable=1;
d->synced=0;
d->filepos=0;
d->audio=new_demuxer_stream(d,a_id);
d->video=new_demuxer_stream(d,v_id);
d->sub=new_demuxer_stream(d,s_id);
d->type=type;
stream_reset(stream);
stream_seek(stream,stream->start_pos);
return d;
}
sh_audio_t* new_sh_audio(demuxer_t *demuxer,int id){
if(demuxer->a_streams[id]){
mp_msg(MSGT_DEMUXER,MSGL_WARN,MSGTR_AudioStreamRedefined,id);
} else {
mp_msg(MSGT_DEMUXER,MSGL_V,"==> Found audio stream: %d\n",id);
demuxer->a_streams[id]=malloc(sizeof(sh_audio_t));
memset(demuxer->a_streams[id],0,sizeof(sh_audio_t));
}
return demuxer->a_streams[id];
}
void free_sh_audio(sh_audio_t* sh){
if(sh->a_in_buffer) free(sh->a_in_buffer);
if(sh->a_buffer) free(sh->a_buffer);
if(sh->wf) free(sh->wf);
free(sh);
}
sh_video_t* new_sh_video(demuxer_t *demuxer,int id){
if(demuxer->v_streams[id]){
mp_msg(MSGT_DEMUXER,MSGL_WARN,MSGTR_VideoStreamRedefined,id);
} else {
mp_msg(MSGT_DEMUXER,MSGL_V,"==> Found video stream: %d\n",id);
demuxer->v_streams[id]=malloc(sizeof(sh_video_t));
memset(demuxer->v_streams[id],0,sizeof(sh_video_t));
}
return demuxer->v_streams[id];
}
void free_sh_video(sh_video_t* sh){
if(sh->our_out_buffer) free(sh->our_out_buffer);
if(sh->bih) free(sh->bih);
free(sh);
}
void free_demuxer(demuxer_t *demuxer){
int i;
// free streams:
for(i=0;i<256;i++){
if(demuxer->a_streams[i]) free_sh_audio(demuxer->a_streams[i]);
if(demuxer->v_streams[i]) free_sh_video(demuxer->v_streams[i]);
}
//if(sh_audio) free_sh_audio(sh_audio);
//if(sh_video) free_sh_video(sh_video);
// free demuxers:
free_demuxer_stream(demuxer->audio);
free_demuxer_stream(demuxer->video);
free(demuxer);
}
void ds_add_packet(demux_stream_t *ds,demux_packet_t* dp){
// demux_packet_t* dp=new_demux_packet(len);
// stream_read(stream,dp->buffer,len);
// dp->pts=pts; //(float)pts/90000.0f;
// dp->pos=pos;
// append packet to DS stream:
++ds->packs;
ds->bytes+=dp->len;
if(ds->last){
// next packet in stream
ds->last->next=dp;
ds->last=dp;
} else {
// first packet in stream
ds->first=ds->last=dp;
}
mp_dbg(MSGT_DEMUXER,MSGL_DBG2,"DEMUX: Append packet to %s, len=%d pts=%5.3f pos=%u [packs: A=%d V=%d]\n",
(ds==ds->demuxer->audio)?"d_audio":"d_video",
dp->len,dp->pts,(unsigned int)dp->pos,ds->demuxer->audio->packs,ds->demuxer->video->packs);
}
void ds_read_packet(demux_stream_t *ds,stream_t *stream,int len,float pts,off_t pos,int flags){
demux_packet_t* dp=new_demux_packet(len);
stream_read(stream,dp->buffer,len);
dp->pts=pts; //(float)pts/90000.0f;
dp->pos=pos;
dp->flags=flags;
// append packet to DS stream:
ds_add_packet(ds,dp);
}
// return value:
// 0 = EOF or no stream found or invalid type
// 1 = successfully read a packet
int demux_mpg_es_fill_buffer(demuxer_t *demux);
int demux_mpg_fill_buffer(demuxer_t *demux);
int demux_avi_fill_buffer(demuxer_t *demux);
int demux_avi_fill_buffer_ni(demuxer_t *demux,demux_stream_t *ds);
int demux_avi_fill_buffer_nini(demuxer_t *demux,demux_stream_t *ds);
int demux_asf_fill_buffer(demuxer_t *demux);
int demux_mov_fill_buffer(demuxer_t *demux,demux_stream_t* ds);
int demux_fill_buffer(demuxer_t *demux,demux_stream_t *ds){
// Note: parameter 'ds' can be NULL!
// printf("demux->type=%d\n",demux->type);
switch(demux->type){
case DEMUXER_TYPE_MPEG_ES: return demux_mpg_es_fill_buffer(demux);
case DEMUXER_TYPE_MPEG_PS: return demux_mpg_fill_buffer(demux);
case DEMUXER_TYPE_AVI: return demux_avi_fill_buffer(demux);
case DEMUXER_TYPE_AVI_NI: return demux_avi_fill_buffer_ni(demux,ds);
case DEMUXER_TYPE_AVI_NINI: return demux_avi_fill_buffer_nini(demux,ds);
case DEMUXER_TYPE_ASF: return demux_asf_fill_buffer(demux);
case DEMUXER_TYPE_MOV: return demux_mov_fill_buffer(demux,ds);
}
return 0;
}
// return value:
// 0 = EOF
// 1 = succesfull
int ds_fill_buffer(demux_stream_t *ds){
demuxer_t *demux=ds->demuxer;
if(ds->buffer) free(ds->buffer);
if(verbose>2){
if(ds==demux->audio) mp_dbg(MSGT_DEMUXER,MSGL_DBG3,"ds_fill_buffer(d_audio) called\n");else
if(ds==demux->video) mp_dbg(MSGT_DEMUXER,MSGL_DBG3,"ds_fill_buffer(d_video) called\n");else
mp_dbg(MSGT_DEMUXER,MSGL_DBG3,"ds_fill_buffer(unknown 0x%X) called\n",(unsigned int)ds);
}
while(1){
if(ds->packs){
demux_packet_t *p=ds->first;
// copy useful data:
ds->buffer=p->buffer;
ds->buffer_pos=0;
ds->buffer_size=p->len;
ds->pos=p->pos;
ds->dpos+=p->len; // !!!
++ds->pack_no;
if(p->pts){
ds->pts=p->pts;
ds->pts_bytes=0;
}
ds->pts_bytes+=p->len; // !!!
ds->flags=p->flags;
// free packet:
ds->bytes-=p->len;
ds->first=p->next;
if(!ds->first) ds->last=NULL;
free(p);
--ds->packs;
return 1; //ds->buffer_size;
}
if(demux->audio->packs>=MAX_PACKS || demux->audio->bytes>=MAX_PACK_BYTES){
mp_msg(MSGT_DEMUXER,MSGL_ERR,MSGTR_TooManyAudioInBuffer,demux->audio->packs,demux->audio->bytes);
mp_msg(MSGT_DEMUXER,MSGL_HINT,MSGTR_MaybeNI);
break;
}
if(demux->video->packs>=MAX_PACKS || demux->video->bytes>=MAX_PACK_BYTES){
mp_msg(MSGT_DEMUXER,MSGL_ERR,MSGTR_TooManyVideoInBuffer,demux->video->packs,demux->video->bytes);
mp_msg(MSGT_DEMUXER,MSGL_HINT,MSGTR_MaybeNI);
break;
}
if(!demux_fill_buffer(demux,ds)){
mp_dbg(MSGT_DEMUXER,MSGL_DBG2,"ds_fill_buffer()->demux_fill_buffer() failed\n");
break; // EOF
}
}
ds->buffer_pos=ds->buffer_size=0;
ds->buffer=NULL;
mp_msg(MSGT_DEMUXER,MSGL_V,"ds_fill_buffer: EOF reached (stream: %s) \n",ds==demux->audio?"audio":"video");
ds->eof=1;
return 0;
}
int demux_read_data(demux_stream_t *ds,unsigned char* mem,int len){
int x;
int bytes=0;
while(len>0){
x=ds->buffer_size-ds->buffer_pos;
if(x==0){
if(!ds_fill_buffer(ds)) return bytes;
} else {
if(x>len) x=len;
if(mem) memcpy(mem+bytes,&ds->buffer[ds->buffer_pos],x);
bytes+=x;len-=x;ds->buffer_pos+=x;
}
}
return bytes;
}
int demux_read_data_pack(demux_stream_t *ds,unsigned char* mem,int len){
int x;
int bytes=0;
while(len>0){
x=ds->buffer_size-ds->buffer_pos;
if(x==0){
if(!ds_fill_buffer(ds)) return bytes;
} else {
if(x>len) x=len;
if(mem) memcpy(mem+bytes,&ds->buffer[ds->buffer_pos],x);
bytes+=x;len-=x;ds->buffer_pos+=x;
return bytes; // stop at end of package! (for correct timestamping)
}
}
return bytes;
}
void ds_free_packs(demux_stream_t *ds){
demux_packet_t *dp=ds->first;
while(dp){
demux_packet_t *dn=dp->next;
free(dp->buffer);
free(dp);
dp=dn;
}
if(ds->asf_packet){
// free unfinished .asf fragments:
free(ds->asf_packet->buffer);
free(ds->asf_packet);
ds->asf_packet=NULL;
}
ds->first=ds->last=NULL;
ds->packs=0; // !!!!!
ds->bytes=0;
if(ds->buffer) free(ds->buffer);
ds->buffer=NULL;
ds->buffer_pos=ds->buffer_size;
ds->pts=0; ds->pts_bytes=0;
}
int ds_get_packet(demux_stream_t *ds,unsigned char **start){
while(1){
int len;
if(ds->buffer_pos>=ds->buffer_size){
if(!ds_fill_buffer(ds)){
// EOF
*start = NULL;
return -1;
}
}
len=ds->buffer_size-ds->buffer_pos;
*start = &ds->buffer[ds->buffer_pos];
ds->buffer_pos+=len;
return len;
}
}
int ds_get_packet_sub(demux_stream_t *ds,unsigned char **start){
while(1){
int len;
if(ds->buffer_pos>=ds->buffer_size){
*start = NULL;
if(!ds->packs) return -1; // no sub
if(!ds_fill_buffer(ds)) return -1; // EOF
}
len=ds->buffer_size-ds->buffer_pos;
*start = &ds->buffer[ds->buffer_pos];
ds->buffer_pos+=len;
return len;
}
}
// ====================================================================
// feed-back from demuxers:
extern int num_elementary_packets100; // for MPEG-ES fileformat detection
extern int num_elementary_packets101;
extern int num_elementary_packetsPES;
extern int num_elementary_packets1B6;
// commandline options, flags:
//extern int seek_to_byte;
extern int force_ni;
extern int pts_from_bps;
extern int audio_id;
extern int video_id;
extern int dvdsub_id;
int asf_check_header(demuxer_t *demuxer);
int read_asf_header(demuxer_t *demuxer);
demux_stream_t* demux_avi_select_stream(demuxer_t *demux,unsigned int id);
demuxer_t* demux_open_avi(demuxer_t* demuxer);
int mov_check_file(demuxer_t* demuxer);
int mov_read_header(demuxer_t* demuxer);
demuxer_t* demux_open(stream_t *stream,int file_format,int audio_id,int video_id,int dvdsub_id){
//int file_format=(*file_format_ptr);
demuxer_t *demuxer=NULL;
demux_stream_t *d_audio=NULL;
demux_stream_t *d_video=NULL;
sh_audio_t *sh_audio=NULL;
sh_video_t *sh_video=NULL;
//printf("demux_open(%p,%d,%d,%d,%d) \n",stream,file_format,audio_id,video_id,dvdsub_id);
//=============== Try to open as AVI file: =================
if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_AVI){
demuxer=new_demuxer(stream,DEMUXER_TYPE_AVI,audio_id,video_id,dvdsub_id);
{ //---- RIFF header:
int id=stream_read_dword_le(demuxer->stream); // "RIFF"
if(id==mmioFOURCC('R','I','F','F')){
stream_read_dword_le(demuxer->stream); //filesize
id=stream_read_dword_le(demuxer->stream); // "AVI "
if(id==formtypeAVI){
mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_DetectedAVIfile);
file_format=DEMUXER_TYPE_AVI;
}
}
}
}
//=============== Try to open as ASF file: =================
if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_ASF){
demuxer=new_demuxer(stream,DEMUXER_TYPE_ASF,audio_id,video_id,dvdsub_id);
if(asf_check_header(demuxer)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_DetectedASFfile);
file_format=DEMUXER_TYPE_ASF;
}
}
//=============== Try to open as MPEG-PS file: =================
if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_MPEG_PS){
int pes=1;
while(pes>=0){
demuxer=new_demuxer(stream,DEMUXER_TYPE_MPEG_PS,audio_id,video_id,dvdsub_id);
if(!pes) demuxer->synced=1; // hack!
num_elementary_packets100=0;
num_elementary_packets101=0;
num_elementary_packets1B6=0;
num_elementary_packetsPES=0;
if(ds_fill_buffer(demuxer->video)){
if(!pes)
mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_DetectedMPEGPESfile);
else
mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_DetectedMPEGPSfile);
file_format=DEMUXER_TYPE_MPEG_PS;
} else {
// some hack to get meaningfull error messages to our unhappy users:
if(num_elementary_packets100>=2 && num_elementary_packets101>=2 &&
abs(num_elementary_packets101-num_elementary_packets100)<8){
if(num_elementary_packetsPES>=4 && num_elementary_packetsPES>=num_elementary_packets100-4){
--pes;continue; // tricky...
}
file_format=DEMUXER_TYPE_MPEG_ES; // <-- hack is here :)
} else {
if(demuxer->synced==2)
mp_msg(MSGT_DEMUXER,MSGL_ERR,"MPEG: " MSGTR_MissingVideoStreamBug);
else
mp_msg(MSGT_DEMUXER,MSGL_V,"Not MPEG System Stream format... (maybe Transport Stream?)\n");
}
}
break;
}
}
//=============== Try to open as MPEG-ES file: =================
if(file_format==DEMUXER_TYPE_MPEG_ES){ // little hack, see above!
demuxer=new_demuxer(stream,DEMUXER_TYPE_MPEG_ES,audio_id,video_id,dvdsub_id);
if(!ds_fill_buffer(demuxer->video)){
mp_msg(MSGT_DEMUXER,MSGL_ERR,MSGTR_InvalidMPEGES);
file_format=DEMUXER_TYPE_UNKNOWN;
} else {
mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_DetectedMPEGESfile);
}
}
//=============== Try to open as MOV file: =================
#if 1
if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_MOV){
demuxer=new_demuxer(stream,DEMUXER_TYPE_MOV,audio_id,video_id,dvdsub_id);
if(mov_check_file(demuxer)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_DetectedQTMOVfile);
file_format=DEMUXER_TYPE_MOV;
}
}
#endif
//=============== Unknown, exiting... ===========================
if(file_format==DEMUXER_TYPE_UNKNOWN){
mp_msg(MSGT_DEMUXER,MSGL_ERR,MSGTR_FormatNotRecognized);
return NULL;
// GUI_MSG( mplUnknowFileType )
}
//====== File format recognized, set up these for compatibility: =========
d_audio=demuxer->audio;
d_video=demuxer->video;
//d_dvdsub=demuxer->sub;
demuxer->file_format=file_format;
switch(file_format){
case DEMUXER_TYPE_MOV: {
if(!mov_read_header(demuxer)) return NULL;
// sh_video=d_video->sh;if(sh_video) sh_video->ds=d_video;
// sh_audio=d_audio->sh;if(sh_audio) sh_audio->ds=d_audio;
break;
}
case DEMUXER_TYPE_AVI: {
return (demuxer_t*) demux_open_avi(demuxer);
// break;
}
case DEMUXER_TYPE_ASF: {
//---- ASF header:
read_asf_header(demuxer);
stream_reset(demuxer->stream);
stream_seek(demuxer->stream,demuxer->movi_start);
// demuxer->idx_pos=0;
// demuxer->endpos=avi_header.movi_end;
if(!ds_fill_buffer(d_video)){
mp_msg(MSGT_DEMUXER,MSGL_WARN,"ASF: " MSGTR_MissingVideoStream);
sh_video=NULL;
//printf("ASF: missing video stream!? contact the author, it may be a bug :(\n");
//GUI_MSG( mplASFErrorMissingVideoStream )
} else {
sh_video=d_video->sh;sh_video->ds=d_video;
sh_video->fps=1000.0f; sh_video->frametime=0.001f; // 1ms
mp_msg(MSGT_DEMUXER,MSGL_INFO,"VIDEO: [%.4s] %ldx%ld %dbpp\n",
(char *)&sh_video->bih->biCompression,
sh_video->bih->biWidth,
sh_video->bih->biHeight,
sh_video->bih->biBitCount);
// sh_video->i_bps=10*asf_packetsize; // FIXME!
}
if(audio_id!=-2){
mp_msg(MSGT_DEMUXER,MSGL_V,"ASF: Searching for audio stream (id:%d)\n",d_audio->id);
if(!ds_fill_buffer(d_audio)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,"ASF: " MSGTR_MissingAudioStream);
sh_audio=NULL;
} else {
sh_audio=d_audio->sh;sh_audio->ds=d_audio;
sh_audio->format=sh_audio->wf->wFormatTag;
}
}
break;
}
case DEMUXER_TYPE_MPEG_ES: {
sh_audio=NULL; // ES streams has no audio channel
d_video->sh=new_sh_video(demuxer,0); // create dummy video stream header, id=0
sh_video=d_video->sh;sh_video->ds=d_video;
break;
}
case DEMUXER_TYPE_MPEG_PS: {
sh_video=d_video->sh;sh_video->ds=d_video;
if(demuxer->stream->type!=STREAMTYPE_VCD) demuxer->movi_start=0; // for VCD
if(audio_id!=-2) {
if(!ds_fill_buffer(d_audio)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,"MPEG: " MSGTR_MissingAudioStream);
sh_audio=NULL;
} else {
sh_audio=d_audio->sh;sh_audio->ds=d_audio;
switch(d_audio->id & 0xE0){ // 1110 0000 b (high 3 bit: type low 5: id)
case 0x00: sh_audio->format=0x50;break; // mpeg
case 0xA0: sh_audio->format=0x10001;break; // dvd pcm
case 0x80: sh_audio->format=0x2000;break; // ac3
default: sh_audio=NULL; // unknown type
}
}
}
break;
}
} // switch(file_format)
pts_from_bps=0; // !!!
return demuxer;
}
int demux_seek_avi(demuxer_t *demuxer,float rel_seek_secs,int flags);
int demux_seek_asf(demuxer_t *demuxer,float rel_seek_secs,int flags);
int demux_seek_mpg(demuxer_t *demuxer,float rel_seek_secs,int flags);
void demux_seek_mov(demuxer_t *demuxer,float pts,int flags);
int demux_seek(demuxer_t *demuxer,float rel_seek_secs,int flags){
demux_stream_t *d_audio=demuxer->audio;
demux_stream_t *d_video=demuxer->video;
sh_audio_t *sh_audio=d_audio->sh;
sh_video_t *sh_video=d_video->sh;
if(!demuxer->seekable){
if(demuxer->file_format==DEMUXER_TYPE_AVI)
mp_msg(MSGT_SEEK,MSGL_WARN,MSGTR_CantSeekRawAVI);
else
mp_msg(MSGT_SEEK,MSGL_WARN,MSGTR_CantSeekFile);
return 0;
}
// clear demux buffers:
if(sh_audio){ ds_free_packs(d_audio);sh_audio->a_buffer_len=0;}
ds_free_packs(d_video);
demuxer->stream->eof=0; // clear eof flag
if(sh_audio) sh_audio->timer=0;
sh_video->timer=0; // !!!!!!
switch(demuxer->file_format){
case DEMUXER_TYPE_AVI:
demux_seek_avi(demuxer,rel_seek_secs,flags); break;
case DEMUXER_TYPE_ASF:
demux_seek_asf(demuxer,rel_seek_secs,flags); break;
case DEMUXER_TYPE_MPEG_ES:
case DEMUXER_TYPE_MPEG_PS:
demux_seek_mpg(demuxer,rel_seek_secs,flags); break;
case DEMUXER_TYPE_MOV:
demux_seek_mov(demuxer,rel_seek_secs,flags); break;
} // switch(demuxer->file_format)
return 1;
}
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