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Make packet interleaving in the muxer not scan through the whole

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buffer when simply appending at the end works.
Much faster if one stream ends prematurely.
Fixes issue1379.

Originally committed as revision 19870 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-09-16 00:59:15 +00:00
parent 42831b46ef
commit ddce56efc5
2 changed files with 24 additions and 10 deletions
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6
libavformat/avformat.h
View File

@ -450,6 +450,12 @@ typedef struct AVStream {
*/
#define MAX_PROBE_PACKETS 100
int probe_packets;
/**
* Number of packets in packet_buffer for this stream when muxing.
* used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav*
*/
int num_in_packet_buffer;
} AVStream;
#define AV_PROGRAM_RUNNING 1

28
libavformat/utils.c
View File

@ -2657,14 +2657,25 @@ void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
pkt->destruct= NULL; // do not free original but only the copy
av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
if(!s->packet_buffer_end || compare(s, &s->packet_buffer_end->pkt, pkt)){
next_point = &s->packet_buffer;
while(*next_point){
if(compare(s, &(*next_point)->pkt, pkt))
break;
next_point= &(*next_point)->next;
}
}else{
next_point = &(s->packet_buffer_end->next);
assert(!*next_point);
}
this_pktl->next= *next_point;
if(!*next_point)
s->packet_buffer_end= this_pktl;
*next_point= this_pktl;
s->streams[pkt->stream_index]->num_in_packet_buffer++;
}
int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
@ -2683,27 +2694,24 @@ int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
AVPacketList *pktl;
int stream_count=0;
int streams[MAX_STREAMS];
int i;
if(pkt){
ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
}
memset(streams, 0, sizeof(streams));
pktl= s->packet_buffer;
while(pktl){
//av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
if(streams[ pktl->pkt.stream_index ] == 0)
stream_count++;
streams[ pktl->pkt.stream_index ]++;
pktl= pktl->next;
}
for(i=0; i < s->nb_streams; i++)
stream_count+= !!s->streams[i]->num_in_packet_buffer;
if(stream_count && (s->nb_streams == stream_count || flush)){
pktl= s->packet_buffer;
*out= pktl->pkt;
s->packet_buffer= pktl->next;
if(!s->packet_buffer)
s->packet_buffer_end= NULL;
s->streams[out->stream_index]->num_in_packet_buffer--;
av_freep(&pktl);
return 1;
}else{