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move packet interleaving function into AVOutputFormat, so it can be overriden easily instead of doing reordering twice if the muxer needs some other interleaving then dts based

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Originally committed as revision 3540 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-09-29 23:25:01 +00:00
parent d1fb157dd7
commit fe2d6fe235
2 changed files with 95 additions and 60 deletions
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3
libavformat/avformat.h
View File

@ -5,7 +5,7 @@
extern "C" {
#endif
#define LIBAVFORMAT_BUILD 4616
#define LIBAVFORMAT_BUILD 4617
#define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
#define LIBAVFORMAT_VERSION FFMPEG_VERSION
@ -140,6 +140,7 @@ typedef struct AVOutputFormat {
int flags;
/* currently only used to set pixel format if not YUV420P */
int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
/* private fields */
struct AVOutputFormat *next;
} AVOutputFormat;

152
libavformat/utils.c
View File

@ -1976,50 +1976,34 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt)
}
/**
* Writes a packet to an output media file ensuring correct interleaving.
* The packet shall contain one audio or video frame.
* If the packets are already correctly interleaved the application should
* call av_write_frame() instead as its slightly faster, its also important
* to keep in mind that non interlaved input will need huge amounts
* of memory to interleave with this, so its prefereable to interleave at the
* demuxer level
*
* @param s media file handle
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
* interleave_packet implementation which will interleave per DTS.
*/
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
static int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
AVPacketList *pktl, **next_point, *this_pktl;
int stream_count=0;
int streams[MAX_STREAMS];
AVStream *st= s->streams[ pkt->stream_index];
compute_pkt_fields2(st, pkt);
//FIXME/XXX/HACK drop zero sized packets
if(st->codec.codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
return 0;
if(pkt){
AVStream *st= s->streams[ pkt->stream_index];
if(pkt->dts == AV_NOPTS_VALUE)
return -1;
assert(pkt->destruct != av_destruct_packet); //FIXME
assert(pkt->destruct != av_destruct_packet); //FIXME
this_pktl = av_mallocz(sizeof(AVPacketList));
this_pktl->pkt= *pkt;
av_dup_packet(&this_pktl->pkt);
this_pktl = av_mallocz(sizeof(AVPacketList));
this_pktl->pkt= *pkt;
av_dup_packet(&this_pktl->pkt);
next_point = &s->packet_buffer;
while(*next_point){
AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
break;
next_point= &(*next_point)->next;
next_point = &s->packet_buffer;
while(*next_point){
AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
break;
next_point= &(*next_point)->next;
}
this_pktl->next= *next_point;
*next_point= this_pktl;
}
this_pktl->next= *next_point;
*next_point= this_pktl;
memset(streams, 0, sizeof(streams));
pktl= s->packet_buffer;
@ -2030,26 +2014,76 @@ int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
streams[ pktl->pkt.stream_index ]++;
pktl= pktl->next;
}
while(s->nb_streams == stream_count){
int ret;
if(s->nb_streams == stream_count || (flush && stream_count)){
pktl= s->packet_buffer;
//av_log(s, AV_LOG_DEBUG, "write st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
truncate_ts(s->streams[pktl->pkt.stream_index], &pktl->pkt);
ret= s->oformat->write_packet(s, &pktl->pkt);
*out= pktl->pkt;
s->packet_buffer= pktl->next;
if((--streams[ pktl->pkt.stream_index ]) == 0)
stream_count--;
av_free_packet(&pktl->pkt);
av_freep(&pktl);
return 1;
}else{
av_init_packet(out);
return 0;
}
}
/**
* Interleaves a AVPacket correctly so it can be muxed.
* @param out the interleaved packet will be output here
* @param in the input packet
* @param flush 1 if no further packets are available as input and all
* remaining packets should be output
* @return 1 if a packet was output, 0 if no packet could be output,
* < 0 if an error occured
*/
static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
if(s->oformat->interleave_packet)
return s->oformat->interleave_packet(s, out, in, flush);
else
return av_interleave_packet_per_dts(s, out, in, flush);
}
/**
* Writes a packet to an output media file ensuring correct interleaving.
* The packet shall contain one audio or video frame.
* If the packets are already correctly interleaved the application should
* call av_write_frame() instead as its slightly faster, its also important
* to keep in mind that completly non interleaved input will need huge amounts
* of memory to interleave with this, so its prefereable to interleave at the
* demuxer level
*
* @param s media file handle
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
*/
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
AVStream *st= s->streams[ pkt->stream_index];
compute_pkt_fields2(st, pkt);
//FIXME/XXX/HACK drop zero sized packets
if(st->codec.codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
return 0;
if(pkt->dts == AV_NOPTS_VALUE)
return -1;
for(;;){
AVPacket opkt;
int ret= av_interleave_packet(s, &opkt, pkt, 0);
if(ret<=0) //FIXME cleanup needed for ret<0 ?
return ret;
truncate_ts(s->streams[opkt.stream_index], &opkt);
ret= s->oformat->write_packet(s, &opkt);
av_free_packet(&opkt);
pkt= NULL;
if(ret<0)
return ret;
}
return 0;
}
/**
@ -2062,21 +2096,21 @@ int av_write_trailer(AVFormatContext *s)
{
int ret;
while(s->packet_buffer){
int ret;
AVPacketList *pktl= s->packet_buffer;
//av_log(s, AV_LOG_DEBUG, "write_trailer st:%d dts:%lld\n", pktl->pkt.stream_index, pktl->pkt.dts);
truncate_ts(s->streams[pktl->pkt.stream_index], &pktl->pkt);
ret= s->oformat->write_packet(s, &pktl->pkt);
for(;;){
AVPacket pkt;
ret= av_interleave_packet(s, &pkt, NULL, 1);
if(ret<0) //FIXME cleanup needed for ret<0 ?
return ret;
if(!ret)
break;
s->packet_buffer= pktl->next;
av_free_packet(&pktl->pkt);
av_freep(&pktl);
truncate_ts(s->streams[pkt.stream_index], &pkt);
ret= s->oformat->write_packet(s, &pkt);
av_free_packet(&pkt);
if(ret<0)
return ret;
return ret;
}
ret = s->oformat->write_trailer(s);