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Simplify the top of rm_assemble_video_frame().

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Originally committed as revision 16400 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-12-30 21:23:02 +00:00
parent e45673cb3a
commit f48d545736
1 changed files with 14 additions and 26 deletions
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40
libavformat/rmdec.c
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@ -492,42 +492,30 @@ static int rm_assemble_video_frame(AVFormatContext *s, ByteIOContext *pb,
hdr = get_byte(pb); len--;
type = hdr >> 6;
switch(type){
case 0: // slice
case 2: // last slice
if(type != 3){ // not frame as a part of packet
seq = get_byte(pb); len--;
}
if(type != 1){ // not whole frame
len2 = get_num(pb, &len);
pos = get_num(pb, &len);
if(len < 1)
return -1;
pos = get_num(pb, &len);
pic_num = get_byte(pb); len--;
rm->remaining_len = len;
break;
case 1: //whole frame
if(len<1)
}
if(len<0)
return -1;
rm->remaining_len = len;
if(type&1){ // frame, not slice
if(type == 3) // frame as a part of packet
len= len2;
if(rm->remaining_len < len)
return -1;
seq = get_byte(pb); len--;
rm->remaining_len -= len;
if(av_new_packet(pkt, len + 9) < 0)
return AVERROR(EIO);
pkt->data[0] = 0;
AV_WL32(pkt->data + 1, 1);
AV_WL32(pkt->data + 5, 0);
get_buffer(pb, pkt->data + 9, len);
rm->remaining_len = 0;
return 0;
case 3: //frame as a part of packet
len2 = get_num(pb, &len);
pos = get_num(pb, &len);
pic_num = get_byte(pb); len--;
if(len < len2)
return -1;
rm->remaining_len = len - len2;
if(av_new_packet(pkt, len2 + 9) < 0)
return AVERROR(EIO);
pkt->data[0] = 0;
AV_WL32(pkt->data + 1, 1);
AV_WL32(pkt->data + 5, 0);
get_buffer(pb, pkt->data + 9, len2);
return 0;
}
//now we have to deal with single slice