virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

make convert_matrix() independant of MpegEncContext

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
libavcodec/mpegvideo.c
View File

@ -94,20 +94,20 @@ static uint8_t default_fcode_tab[MAX_MV*2+1];
enum PixelFormat ff_yuv420p_list[2]= {PIX_FMT_YUV420P, -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) const uint16_t *quant_matrix, int bias, int qmin, int qmax)
{ {
int qscale; int qscale;
for(qscale=qmin; qscale<=qmax; qscale++){ for(qscale=qmin; qscale<=qmax; qscale++){
int i; int i;
if (s->dsp.fdct == ff_jpeg_fdct_islow if (dsp->fdct == ff_jpeg_fdct_islow
#ifdef FAAN_POSTSCALE #ifdef FAAN_POSTSCALE
|| s->dsp.fdct == ff_faandct || dsp->fdct == ff_faandct
#endif #endif
) { ) {
for(i=0;i<64;i++) { 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 */ /* 16 <= qscale * quant_matrix[i] <= 7905 */
/* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */ /* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
/* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/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) / qmat[qscale][i] = (int)((uint64_t_C(1) << QMAT_SHIFT) /
(qscale * quant_matrix[j])); (qscale * quant_matrix[j]));
} }
} else if (s->dsp.fdct == fdct_ifast } else if (dsp->fdct == fdct_ifast
#ifndef FAAN_POSTSCALE #ifndef FAAN_POSTSCALE
|| s->dsp.fdct == ff_faandct || dsp->fdct == ff_faandct
#endif #endif
) { ) {
for(i=0;i<64;i++) { 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 */ /* 16 <= qscale * quant_matrix[i] <= 7905 */
/* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */ /* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */
/* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= (1<<36)/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 { } else {
for(i=0;i<64;i++) { 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 /* We can safely suppose that 16 <= quant_matrix[i] <= 255
So 16 <= qscale * quant_matrix[i] <= 7905 So 16 <= qscale * quant_matrix[i] <= 7905
so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 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 */ /* precompute matrix */
/* for mjpeg, we do include qscale in the matrix */ /* for mjpeg, we do include qscale in the matrix */
if (s->out_format != FMT_MJPEG) { 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); 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); 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); 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); s->intra_matrix, s->intra_quant_bias, 8, 8);
} }