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Code Issues Releases Activity

make convert_matrix() independant of MpegEncContext

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Originally committed as revision 2441 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-10-27 14:37:30 +00:00
parent 0bf92f7957
commit 6b56c616d9
1 changed files with 11 additions and 11 deletions
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22
libavcodec/mpegvideo.c
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@ -94,20 +94,20 @@ static uint8_t default_fcode_tab[MAX_MV*2+1];
enum PixelFormat ff_yuv420p_list[2]= {PIX_FMT_YUV420P, -1};
static void convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16)[2][64],
static void convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
const uint16_t *quant_matrix, int bias, int qmin, int qmax)
{
int qscale;
for(qscale=qmin; qscale<=qmax; qscale++){
int i;
if (s->dsp.fdct == ff_jpeg_fdct_islow
if (dsp->fdct == ff_jpeg_fdct_islow
#ifdef FAAN_POSTSCALE
|| s->dsp.fdct == ff_faandct
|| dsp->fdct == ff_faandct
#endif
) {
for(i=0;i<64;i++) {
const int j= s->dsp.idct_permutation[i];
const int j= dsp->idct_permutation[i];
/* 16 <= qscale * quant_matrix[i] <= 7905 */
/* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
/* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/249205026 */
@ -116,13 +116,13 @@ 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 (dsp->fdct == fdct_ifast
#ifndef FAAN_POSTSCALE
|| s->dsp.fdct == ff_faandct
|| dsp->fdct == ff_faandct
#endif
) {
for(i=0;i<64;i++) {
const int j= s->dsp.idct_permutation[i];
const int j= dsp->idct_permutation[i];
/* 16 <= qscale * quant_matrix[i] <= 7905 */
/* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
/* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/249205026 */
@ -133,7 +133,7 @@ static void convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16
}
} else {
for(i=0;i<64;i++) {
const int j= s->dsp.idct_permutation[i];
const int j= dsp->idct_permutation[i];
/* We can safely suppose that 16 <= quant_matrix[i] <= 255
So 16 <= qscale * quant_matrix[i] <= 7905
so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 7905
@ -903,9 +903,9 @@ int MPV_encode_init(AVCodecContext *avctx)
/* precompute matrix */
/* for mjpeg, we do include qscale in the matrix */
if (s->out_format != FMT_MJPEG) {
convert_matrix(s, s->q_intra_matrix, s->q_intra_matrix16,
convert_matrix(&s->dsp, s->q_intra_matrix, s->q_intra_matrix16,
s->intra_matrix, s->intra_quant_bias, 1, 31);
convert_matrix(s, s->q_inter_matrix, s->q_inter_matrix16,
convert_matrix(&s->dsp, s->q_inter_matrix, s->q_inter_matrix16,
s->inter_matrix, s->inter_quant_bias, 1, 31);
}
@ -3522,7 +3522,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->intra_matrix[j] = CLAMP_TO_8BIT((ff_mpeg1_default_intra_matrix[i] * s->qscale) >> 3);
}
convert_matrix(s, s->q_intra_matrix, s->q_intra_matrix16,
convert_matrix(&s->dsp, s->q_intra_matrix, s->q_intra_matrix16,
s->intra_matrix, s->intra_quant_bias, 8, 8);
}