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-rw-r--r--demuxer.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/demuxer.c b/demuxer.c
new file mode 100644
index 0000000000..54d0314c14
--- /dev/null
+++ b/demuxer.c
@@ -0,0 +1,285 @@
+//=================== DEMUXER v2.5 =========================
+
+#define MAX_PACKS 2048
+#define MAX_PACK_BYTES 0x400000
+
+typedef struct demux_packet_st {
+ int len;
+ float pts;
+ int pos; // pozicio indexben (AVI) ill. fileban (MPG)
+ unsigned char* buffer;
+ struct demux_packet_st* next;
+} demux_packet_t;
+
+inline demux_packet_t* new_demux_packet(int len){
+ demux_packet_t* dp=malloc(sizeof(demux_packet_t));
+ dp->len=len;
+ dp->buffer=malloc(len);
+ dp->next=NULL;
+ dp->pts=0;
+ dp->pos=0;
+ return dp;
+}
+
+inline void free_demux_packet(demux_packet_t* dp){
+ free(dp->buffer);
+ free(dp);
+}
+
+typedef struct {
+ int buffer_pos; // current buffer position
+ int buffer_size; // current buffer size
+ unsigned char* buffer; // current buffer
+ float pts; // current buffer's pts
+ int eof; // end of demuxed stream? (true if all buffer empty)
+ int pos; // position in the input stream (file)
+ int dpos; // position in the demuxed stream
+//---------------
+ int packs; // number of packets in buffer
+ int bytes; // total bytes of packets in buffer
+ demux_packet_t *first; // read to current buffer from here
+ demux_packet_t *last; // append new packets from input stream to here
+ int id; // stream ID (for multiple audio/video streams)
+ int type; // stream type (currently used only for audio)
+ struct demuxer_st *demuxer; // parent demuxer structure (stream handler)
+// ---- asf -----
+ demux_packet_t *asf_packet; // read asf fragments here
+ int asf_seq;
+} demux_stream_t;
+
+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->eof=0;
+ ds->pos=0;
+ ds->dpos=0;
+//---------------
+ ds->packs=0;
+ ds->bytes=0;
+ ds->first=ds->last=NULL;
+ ds->id=id;
+ ds->type=-1;
+ ds->demuxer=demuxer;
+//----------------
+ ds->asf_seq=-1;
+ ds->asf_packet=NULL;
+ return ds;
+}
+
+#define DEMUXER_TYPE_UNKNOWN 0
+#define DEMUXER_TYPE_MPEG_ES 1
+#define DEMUXER_TYPE_MPEG_PS 2
+#define DEMUXER_TYPE_AVI 3
+#define DEMUXER_TYPE_AVI_NI 4
+#define DEMUXER_TYPE_AVI_NINI 5
+#define DEMUXER_TYPE_ASF 6
+
+#define DEMUXER_TIME_NONE 0
+#define DEMUXER_TIME_PTS 1
+#define DEMUXER_TIME_FILE 2
+#define DEMUXER_TIME_BPS 3
+
+typedef struct demuxer_st {
+ stream_t *stream;
+ int synced; // stream synced (used by mpeg)
+ int filepos; // input stream current pos.
+ int endpos; // input stream end pos. (return EOF fi filepos>endpos)
+ int type; // mpeg system stream, mpeg elementary s., avi raw, avi indexed
+// int time_src;// time source (pts/file/bps)
+ demux_stream_t *audio;
+ demux_stream_t *video;
+} demuxer_t;
+
+demuxer_t* new_demuxer(stream_t *stream,int type,int a_id,int v_id){
+ demuxer_t *d=malloc(sizeof(demuxer_t));
+ d->stream=stream;
+ d->synced=0;
+ d->filepos=0;
+ d->audio=new_demuxer_stream(d,a_id);
+ d->video=new_demuxer_stream(d,v_id);
+ d->type=type;
+ return d;
+}
+
+static 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;
+ }
+ if(verbose>=2)
+ printf("DEMUX: Append packet to %s, len=%d pts=%5.3f pos=%d [packs: A=%d V=%d]\n",
+ (ds==ds->demuxer->audio)?"d_audio":"d_video",
+ dp->len,dp->pts,dp->pos,ds->demuxer->audio->packs,ds->demuxer->video->packs);
+}
+
+static void ds_read_packet(demux_stream_t *ds,stream_t *stream,int len,float pts,int pos){
+ 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_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_fill_buffer(demuxer_t *demux,demux_stream_t *ds){
+ // Note: parameter 'ds' can be NULL!
+ 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);
+ }
+ return 0;
+}
+
+// return value:
+// 0 = EOF
+// 1 = succesfull
+inline static 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) printf("ds_fill_buffer(d_audio) called\n");else
+ if(ds==demux->video) printf("ds_fill_buffer(d_video) called\n");else
+ printf("ds_fill_buffer(unknown 0x%X) called\n",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->pts=p->pts;
+ // 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){
+ printf("\nDEMUXER: Too many (%d in %d bytes) audio packets in the buffer!\n",demux->audio->packs,demux->audio->bytes);
+ printf("(maybe you play a non-interleaved stream/file or audio codec failed)\n");
+ break;
+ }
+ if(demux->video->packs>=MAX_PACKS || demux->video->bytes>=MAX_PACK_BYTES){
+ printf("\nDEMUXER: Too many (%d in %d bytes) video packets in the buffer!\n",demux->video->packs,demux->video->bytes);
+ printf("(maybe you play a non-interleaved stream/file or video codec failed)\n");
+ break;
+ }
+ if(!demux_fill_buffer(demux,ds)) break; // EOF
+ }
+ ds->buffer_pos=ds->buffer_size=0;
+ ds->buffer=NULL;
+ if(verbose) printf("ds_fill_buffer: EOF reached (stream: %s) \n",ds==demux->audio?"audio":"video");
+ ds->eof=1;
+ return 0;
+}
+
+inline int ds_tell(demux_stream_t *ds){
+ return (ds->dpos-ds->buffer_size)+ds->buffer_pos;
+}
+
+int demux_read_data(demux_stream_t *ds,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;
+}
+
+
+#if 1
+#define demux_getc(ds) (\
+ (ds->buffer_pos<ds->buffer_size) ? ds->buffer[ds->buffer_pos++] \
+ :((!ds_fill_buffer(ds))? (-1) : ds->buffer[ds->buffer_pos++] ) )
+#else
+inline static int demux_getc(demux_stream_t *ds){
+ if(ds->buffer_pos>=ds->buffer_size){
+ if(!ds_fill_buffer(ds)){
+// printf("DEMUX_GETC: EOF reached!\n");
+ return -1; // EOF
+ }
+ }
+// printf("[%02X]",ds->buffer[ds->buffer_pos]);
+ return ds->buffer[ds->buffer_pos++];
+}
+#endif
+
+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;
+}
+
+int ds_get_packet(demux_stream_t *ds,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;
+ }
+}