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optionally merge postscale into quantization table for the float aan dct

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Originally committed as revision 2420 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-10-23 09:11:56 +00:00
parent 10becaaf12
commit b4c3816cfa
4 changed files with 30 additions and 11 deletions
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12
libavcodec/mpegvideo.c
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@@ -101,7 +101,11 @@ static void convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16
for(qscale=qmin; qscale<=qmax; qscale++){
int i;
if (s->dsp.fdct == ff_jpeg_fdct_islow || s->dsp.fdct == ff_faandct) {
if (s->dsp.fdct == ff_jpeg_fdct_islow
#ifdef FAAN_POSTSCALE
|| s->dsp.fdct == ff_faandct
#endif
) {
for(i=0;i<64;i++) {
const int j= s->dsp.idct_permutation[i];
/* 16 <= qscale * quant_matrix[i] <= 7905 */
@@ -112,7 +116,11 @@ static void convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16
qmat[qscale][i] = (int)((uint64_t_C(1) << QMAT_SHIFT) /
(qscale * quant_matrix[j]));
}
} else if (s->dsp.fdct == fdct_ifast) {
} else if (s->dsp.fdct == fdct_ifast
#ifndef FAAN_POSTSCALE
|| s->dsp.fdct == ff_faandct
#endif
) {
for(i=0;i<64;i++) {
const int j= s->dsp.idct_permutation[i];
/* 16 <= qscale * quant_matrix[i] <= 7905 */