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ffmpeg.wasm-core
Commit afd302fa authored by Ronald S. Bultje's avatar Ronald S. Bultje Committed by Benoit Fouet
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Split out the packet parsing from the main function body in rmdec.c 

into its own function
Patch by Ronald S. Bultje: rsbultje gmail com
Original thread: Re: [FFmpeg-devel] [PATCH 2/6] rmdec.c: ff_rm_parse_frame()
Date: 11/05/2007 09:23 PM

Originally committed as revision 10961 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 7e4b1611
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Showing with 98 additions and 82 deletions
libavformat/rmdec.c
View file @ afd302fa
......@@ -535,6 +535,103 @@ static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *
return 1;
}
static int
ff_rm_parse_packet (AVFormatContext *s, AVStream *st, int len, AVPacket *pkt,
int *seq, int *flags, int64_t *timestamp)
{
ByteIOContext *pb = &s->pb;
RMContext *rm = s->priv_data;
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
rm->current_stream= st->id;
if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
return -1; //got partial frame
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
if ((st->codec->codec_id == CODEC_ID_RA_288) ||
(st->codec->codec_id == CODEC_ID_COOK) ||
(st->codec->codec_id == CODEC_ID_ATRAC3)) {
int x;
int sps = rm->sub_packet_size;
int cfs = rm->coded_framesize;
int h = rm->sub_packet_h;
int y = rm->sub_packet_cnt;
int w = rm->audio_framesize;
if (*flags & 2)
y = rm->sub_packet_cnt = 0;
if (!y)
rm->audiotimestamp = *timestamp;
switch(st->codec->codec_id) {
case CODEC_ID_RA_288:
for (x = 0; x < h/2; x++)
get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
break;
case CODEC_ID_ATRAC3:
case CODEC_ID_COOK:
for (x = 0; x < w/sps; x++)
get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
break;
}
if (++(rm->sub_packet_cnt) < h)
return -1;
else {
rm->sub_packet_cnt = 0;
rm->audio_stream_num = st->index;
rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
// Release first audio packet
av_new_packet(pkt, st->codec->block_align);
memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
*timestamp = rm->audiotimestamp;
*flags = 2; // Mark first packet as keyframe
}
} else if (st->codec->codec_id == CODEC_ID_AAC) {
int x;
rm->audio_stream_num = st->index;
rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
if (rm->sub_packet_cnt) {
for (x = 0; x < rm->sub_packet_cnt; x++)
rm->sub_packet_lengths[x] = get_be16(pb);
// Release first audio packet
rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
*flags = 2; // Mark first packet as keyframe
}
} else
av_get_packet(pb, pkt, len);
} else
av_get_packet(pb, pkt, len);
if( (st->discard >= AVDISCARD_NONKEY && !(*flags&2))
|| st->discard >= AVDISCARD_ALL){
av_free_packet(pkt);
return -1;
}
pkt->stream_index = st->index;
#if 0
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
if(st->codec->codec_id == CODEC_ID_RV20){
int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
seq |= (*timestamp&~0x3FFF);
if(seq - *timestamp > 0x2000) seq -= 0x4000;
if(seq - *timestamp < -0x2000) seq += 0x4000;
}
}
#endif
pkt->pts= *timestamp;
if (*flags & 2)
pkt->flags |= PKT_FLAG_KEY;
return 0;
}
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
{
RMContext *rm = s->priv_data;
......@@ -593,91 +690,10 @@ resync:
return AVERROR(EIO);
st = s->streams[i];
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
rm->current_stream= st->id;
if(rm_assemble_video_frame(s, rm, pkt, len) == 1)
goto resync;//got partial frame
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
if ((st->codec->codec_id == CODEC_ID_RA_288) ||
(st->codec->codec_id == CODEC_ID_COOK) ||
(st->codec->codec_id == CODEC_ID_ATRAC3)) {
int x;
int sps = rm->sub_packet_size;
int cfs = rm->coded_framesize;
int h = rm->sub_packet_h;
int y = rm->sub_packet_cnt;
int w = rm->audio_framesize;
if (flags & 2)
y = rm->sub_packet_cnt = 0;
if (!y)
rm->audiotimestamp = timestamp;
switch(st->codec->codec_id) {
case CODEC_ID_RA_288:
for (x = 0; x < h/2; x++)
get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
break;
case CODEC_ID_ATRAC3:
case CODEC_ID_COOK:
for (x = 0; x < w/sps; x++)
get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
break;
}
if (++(rm->sub_packet_cnt) < h)
goto resync;
else {
rm->sub_packet_cnt = 0;
rm->audio_stream_num = st->index;
rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
// Release first audio packet
av_new_packet(pkt, st->codec->block_align);
memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
timestamp = rm->audiotimestamp;
flags = 2; // Mark first packet as keyframe
}
} else if (st->codec->codec_id == CODEC_ID_AAC) {
int x;
rm->audio_stream_num = st->index;
rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
if (rm->sub_packet_cnt) {
for (x = 0; x < rm->sub_packet_cnt; x++)
rm->sub_packet_lengths[x] = get_be16(pb);
// Release first audio packet
rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
flags = 2; // Mark first packet as keyframe
}
} else
av_get_packet(pb, pkt, len);
} else
av_get_packet(pb, pkt, len);
if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
|| st->discard >= AVDISCARD_ALL){
av_free_packet(pkt);
if (ff_rm_parse_packet (s, st, len, pkt, &seq, &flags, &timestamp) < 0)
goto resync;
}
pkt->stream_index = st->index;
#if 0
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
if(st->codec->codec_id == CODEC_ID_RV20){
int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", timestamp, timestamp*512LL/25, seq);
seq |= (timestamp&~0x3FFF);
if(seq - timestamp > 0x2000) seq -= 0x4000;
if(seq - timestamp < -0x2000) seq += 0x4000;
}
}
#endif
pkt->pts= timestamp;
if(flags&2){
pkt->flags |= PKT_FLAG_KEY;
if((seq&0x7F) == 1)
av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
}
......
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