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Slightly simplify ipvideo_decode_block_opcode_0xD

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Originally committed as revision 18283 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-03-31 19:36:44 +00:00
parent 49a20ffabc
commit 993a442315
1 changed files with 7 additions and 13 deletions
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20
libavcodec/interplayvideo.c
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@ -500,24 +500,18 @@ static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s)
static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s)
{
int y;
unsigned char P[4];
unsigned char index = 0;
unsigned char P;
/* 4-color block encoding: each 4x4 block is a different color */
CHECK_STREAM_PTR(4);
memcpy(P, s->stream_ptr, 4);
s->stream_ptr += 4;
for (y = 0; y < 8; y++) {
if (y < 4)
index = 0;
else
index = 2;
memset(s->pixel_ptr , P[index ], 4);
memset(s->pixel_ptr + 4, P[index + 1], 4);
for (y = 0; y < 16; y++) {
if (!(y & 3)) // start of block
P = *s->stream_ptr++;
memset(s->pixel_ptr, P, 4);
s->pixel_ptr += s->stride;
// switch to right half
if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
}
/* report success */