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Code Issues Releases Activity

Improve readability of 4bpp raw decoder and prepare for supporting 2bpp.

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Originally committed as revision 21026 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Carl Eugen Hoyos 2010-01-05 00:41:29 +00:00
parent 7b1312fa55
commit 0a1e15109a
1 changed files with 6 additions and 5 deletions
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11
libavcodec/rawdec.c
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@ -118,12 +118,13 @@ static int raw_decode(AVCodecContext *avctx,
if(avctx->bits_per_coded_sample == 4 && avctx->pix_fmt==PIX_FMT_PAL8 &&
(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
int i;
for(i=256*2; i+1 < context->length>>1; i++){
context->buffer[2*i+0]= buf[i-256*2]>>4;
context->buffer[2*i+1]= buf[i-256*2]&15;
uint8_t *dst = context->buffer + 256*4;
buf_size = context->length - 256*4;
for(i=0; 2*i+1 < buf_size; i++){
dst[2*i+0]= buf[i]>>4;
dst[2*i+1]= buf[i]&15;
}
buf= context->buffer + 256*4;
buf_size= context->length - 256*4;
buf= dst;
}
if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))