53 int16_t *
block,
int n,
int qscale)
56 const uint16_t *quant_matrix;
58 nCoeffs=
s->block_last_index[n];
60 block[0] *= n < 4 ?
s->y_dc_scale :
s->c_dc_scale;
62 quant_matrix =
s->intra_matrix;
63 for(
i=1;
i<=nCoeffs;
i++) {
64 int j=
s->intra_scantable.permutated[
i];
82 int16_t *
block,
int n,
int qscale)
85 const uint16_t *quant_matrix;
87 nCoeffs=
s->block_last_index[n];
89 quant_matrix =
s->inter_matrix;
90 for(
i=0;
i<=nCoeffs;
i++) {
91 int j=
s->intra_scantable.permutated[
i];
97 ((
int) (quant_matrix[j]))) >> 4;
102 ((
int) (quant_matrix[j]))) >> 4;
111 int16_t *
block,
int n,
int qscale)
114 const uint16_t *quant_matrix;
119 if(
s->alternate_scan) nCoeffs= 63;
120 else nCoeffs=
s->block_last_index[n];
122 block[0] *= n < 4 ?
s->y_dc_scale :
s->c_dc_scale;
123 quant_matrix =
s->intra_matrix;
124 for(
i=1;
i<=nCoeffs;
i++) {
125 int j=
s->intra_scantable.permutated[
i];
141 int16_t *
block,
int n,
int qscale)
144 const uint16_t *quant_matrix;
150 if(
s->alternate_scan) nCoeffs= 63;
151 else nCoeffs=
s->block_last_index[n];
153 block[0] *= n < 4 ?
s->y_dc_scale :
s->c_dc_scale;
155 quant_matrix =
s->intra_matrix;
156 for(
i=1;
i<=nCoeffs;
i++) {
157 int j=
s->intra_scantable.permutated[
i];
175 int16_t *
block,
int n,
int qscale)
178 const uint16_t *quant_matrix;
184 if(
s->alternate_scan) nCoeffs= 63;
185 else nCoeffs=
s->block_last_index[n];
187 quant_matrix =
s->inter_matrix;
188 for(
i=0;
i<=nCoeffs;
i++) {
189 int j=
s->intra_scantable.permutated[
i];
195 ((
int) (quant_matrix[j]))) >> 5;
199 ((
int) (quant_matrix[j]))) >> 5;
209 int16_t *
block,
int n,
int qscale)
219 block[0] *= n < 4 ?
s->y_dc_scale :
s->c_dc_scale;
220 qadd = (qscale - 1) | 1;
227 nCoeffs=
s->intra_scantable.raster_end[
s->block_last_index[n] ];
229 for(
i=1;
i<=nCoeffs;
i++) {
243 int16_t *
block,
int n,
int qscale)
250 qadd = (qscale - 1) | 1;
253 nCoeffs=
s->inter_scantable.raster_end[
s->block_last_index[n] ];
255 for(
i=0;
i<=nCoeffs;
i++) {
292 for (
i=0;
i<4;
i++) {
293 s->hdsp.avg_pixels_tab[0][
i] =
gray16;
294 s->hdsp.put_pixels_tab[0][
i] =
gray16;
295 s->hdsp.put_no_rnd_pixels_tab[0][
i] =
gray16;
297 s->hdsp.avg_pixels_tab[1][
i] =
gray8;
298 s->hdsp.put_pixels_tab[1][
i] =
gray8;
299 s->hdsp.put_no_rnd_pixels_tab[1][
i] =
gray8;
332 s->idsp.mpeg4_studio_profile =
s->studio_profile;
338 if (
s->alternate_scan) {
352 s->chroma_x_shift,
s->chroma_y_shift,
s->out_format,
353 s->mb_stride,
s->mb_width,
s->mb_height,
s->b8_stride,
354 &
s->linesize, &
s->uvlinesize);
359 int y_size =
s->b8_stride * (2 *
s->mb_height + 1);
360 int c_size =
s->mb_stride * (
s->mb_height + 1);
361 int yc_size = y_size + 2 * c_size;
364 if (
s->mb_height & 1)
365 yc_size += 2*
s->b8_stride + 2*
s->mb_stride;
367 s->sc.edge_emu_buffer =
370 s->sc.rd_scratchpad =
372 s->sc.obmc_scratchpad =
NULL;
379 if (
s->noise_reduction) {
381 2 * 64 *
sizeof(
int),
fail)
385 s->block =
s->blocks[0];
387 for (
i = 0;
i < 12;
i++) {
388 s->pblocks[
i] = &
s->block[
i];
392 s->dpcm_direction = 0;
395 if (
s->avctx->codec_tag ==
AV_RL32(
"VCR2")) {
397 FFSWAP(
void *,
s->pblocks[4],
s->pblocks[5]);
403 yc_size *
sizeof(int16_t) * 16,
fail);
404 s->ac_val[0] =
s->ac_val_base +
s->b8_stride + 1;
405 s->ac_val[1] =
s->ac_val_base + y_size +
s->mb_stride + 1;
406 s->ac_val[2] =
s->ac_val[1] + c_size;
422 s->sc.rd_scratchpad =
424 s->sc.obmc_scratchpad =
NULL;
438 #define COPY(a) bak->a = src->a
439 COPY(sc.edge_emu_buffer);
442 COPY(sc.rd_scratchpad);
443 COPY(sc.b_scratchpad);
444 COPY(sc.obmc_scratchpad);
450 COPY(dpcm_macroblock);
451 COPY(dpcm_direction);
474 for (
i = 0;
i < 12;
i++) {
485 "scratch buffers.\n");
504 if (!
s->context_initialized) {
509 s->bitstream_buffer =
NULL;
510 s->bitstream_buffer_size =
s->allocated_bitstream_buffer_size = 0;
512 if (
s1->context_initialized){
524 if (
s->height !=
s1->height ||
s->width !=
s1->width ||
s->context_reinit) {
525 s->context_reinit = 0;
526 s->height =
s1->height;
527 s->width =
s1->width;
532 s->avctx->coded_height =
s1->avctx->coded_height;
533 s->avctx->coded_width =
s1->avctx->coded_width;
534 s->avctx->width =
s1->avctx->width;
535 s->avctx->height =
s1->avctx->height;
537 s->quarter_sample =
s1->quarter_sample;
539 s->coded_picture_number =
s1->coded_picture_number;
540 s->picture_number =
s1->picture_number;
546 if (
s1->picture &&
s1->picture[
i].f->buf[0] &&
551 #define UPDATE_PICTURE(pic)\
553 ff_mpeg_unref_picture(s->avctx, &s->pic);\
554 if (s1->pic.f && s1->pic.f->buf[0])\
555 ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\
557 ret = ff_update_picture_tables(&s->pic, &s1->pic);\
566 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
567 ((pic && pic >= old_ctx->picture && \
568 pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
569 &new_ctx->picture[pic - old_ctx->picture] : NULL)
576 s->next_p_frame_damaged =
s1->next_p_frame_damaged;
577 s->workaround_bugs =
s1->workaround_bugs;
578 s->padding_bug_score =
s1->padding_bug_score;
581 memcpy(&
s->last_time_base, &
s1->last_time_base,
582 (
char *) &
s1->pb_field_time +
sizeof(
s1->pb_field_time) -
583 (
char *) &
s1->last_time_base);
586 s->max_b_frames =
s1->max_b_frames;
587 s->low_delay =
s1->low_delay;
588 s->droppable =
s1->droppable;
591 s->divx_packed =
s1->divx_packed;
593 if (
s1->bitstream_buffer) {
594 if (
s1->bitstream_buffer_size +
597 &
s->allocated_bitstream_buffer_size,
598 s1->allocated_bitstream_buffer_size);
599 if (!
s->bitstream_buffer) {
600 s->bitstream_buffer_size = 0;
604 s->bitstream_buffer_size =
s1->bitstream_buffer_size;
605 memcpy(
s->bitstream_buffer,
s1->bitstream_buffer,
606 s1->bitstream_buffer_size);
607 memset(
s->bitstream_buffer +
s->bitstream_buffer_size, 0,
612 if (!
s->sc.edge_emu_buffer)
615 &
s->sc,
s1->linesize) < 0) {
617 "scratch buffers.\n");
622 "be allocated due to unknown size.\n");
626 memcpy(&
s->progressive_sequence, &
s1->progressive_sequence,
627 (
char *) &
s1->rtp_mode - (
char *) &
s1->progressive_sequence);
629 if (!
s1->first_field) {
630 s->last_pict_type =
s1->pict_type;
631 if (
s1->current_picture_ptr)
632 s->last_lambda_for[
s1->pict_type] =
s1->current_picture_ptr->f->quality;
646 s->y_dc_scale_table =
649 s->progressive_frame = 1;
650 s->progressive_sequence = 1;
653 s->coded_picture_number = 0;
654 s->picture_number = 0;
659 s->slice_context_count = 1;
689 int y_size, c_size, yc_size,
i, mb_array_size, mv_table_size,
x, y;
691 s->mb_width = (
s->width + 15) / 16;
692 s->mb_stride =
s->mb_width + 1;
693 s->b8_stride =
s->mb_width * 2 + 1;
694 mb_array_size =
s->mb_height *
s->mb_stride;
695 mv_table_size = (
s->mb_height + 2) *
s->mb_stride + 1;
699 s->h_edge_pos =
s->mb_width * 16;
700 s->v_edge_pos =
s->mb_height * 16;
702 s->mb_num =
s->mb_width *
s->mb_height;
707 s->block_wrap[3] =
s->b8_stride;
709 s->block_wrap[5] =
s->mb_stride;
711 y_size =
s->b8_stride * (2 *
s->mb_height + 1);
712 c_size =
s->mb_stride * (
s->mb_height + 1);
713 yc_size = y_size + 2 * c_size;
715 if (
s->mb_height & 1)
716 yc_size += 2*
s->b8_stride + 2*
s->mb_stride;
720 for (y = 0; y <
s->mb_height; y++)
721 for (
x = 0;
x <
s->mb_width;
x++)
722 s->mb_index2xy[
x + y *
s->mb_width] =
x + y *
s->mb_stride;
724 s->mb_index2xy[
s->mb_height *
s->mb_width] = (
s->mb_height - 1) *
s->mb_stride +
s->mb_width;
734 s->p_mv_table =
s->p_mv_table_base +
s->mb_stride + 1;
735 s->b_forw_mv_table =
s->b_forw_mv_table_base +
s->mb_stride + 1;
736 s->b_back_mv_table =
s->b_back_mv_table_base +
s->mb_stride + 1;
737 s->b_bidir_forw_mv_table =
s->b_bidir_forw_mv_table_base +
s->mb_stride + 1;
738 s->b_bidir_back_mv_table =
s->b_bidir_back_mv_table_base +
s->mb_stride + 1;
739 s->b_direct_mv_table =
s->b_direct_mv_table_base +
s->mb_stride + 1;
747 mb_array_size *
sizeof(
float),
fail);
749 mb_array_size *
sizeof(
float),
fail);
756 for (
i = 0;
i < 2;
i++) {
758 for (j = 0; j < 2; j++) {
759 for (k = 0; k < 2; k++) {
761 s->b_field_mv_table_base[
i][j][k],
762 mv_table_size * 2 *
sizeof(int16_t),
764 s->b_field_mv_table[
i][j][k] =
s->b_field_mv_table_base[
i][j][k] +
769 s->p_field_mv_table[
i][j] =
s->p_field_mv_table_base[
i][j] +
s->mb_stride + 1;
777 s->coded_block =
s->coded_block_base +
s->b8_stride + 1;
784 if (
s->h263_pred ||
s->h263_plus || !
s->encoding) {
788 s->dc_val[0] =
s->dc_val_base +
s->b8_stride + 1;
789 s->dc_val[1] =
s->dc_val_base + y_size +
s->mb_stride + 1;
790 s->dc_val[2] =
s->dc_val[1] + c_size;
791 for (
i = 0;
i < yc_size;
i++)
792 s->dc_val_base[
i] = 1024;
797 memset(
s->mbintra_table, 1, mb_array_size);
812 memset(&
s->next_picture, 0,
sizeof(
s->next_picture));
813 memset(&
s->last_picture, 0,
sizeof(
s->last_picture));
814 memset(&
s->current_picture, 0,
sizeof(
s->current_picture));
815 memset(&
s->new_picture, 0,
sizeof(
s->new_picture));
817 memset(
s->thread_context, 0,
sizeof(
s->thread_context));
820 s->me.score_map =
NULL;
821 s->dct_error_sum =
NULL;
825 memset(
s->pblocks, 0,
sizeof(
s->pblocks));
826 s->dpcm_direction = 0;
827 s->dpcm_macroblock =
NULL;
828 s->ac_val_base =
NULL;
832 s->sc.edge_emu_buffer =
NULL;
833 s->me.scratchpad =
NULL;
835 s->sc.rd_scratchpad =
837 s->sc.obmc_scratchpad =
NULL;
840 s->bitstream_buffer =
NULL;
841 s->allocated_bitstream_buffer_size = 0;
844 s->p_mv_table_base =
NULL;
845 s->b_forw_mv_table_base =
NULL;
846 s->b_back_mv_table_base =
NULL;
847 s->b_bidir_forw_mv_table_base =
NULL;
848 s->b_bidir_back_mv_table_base =
NULL;
849 s->b_direct_mv_table_base =
NULL;
850 s->p_mv_table =
NULL;
851 s->b_forw_mv_table =
NULL;
852 s->b_back_mv_table =
NULL;
853 s->b_bidir_forw_mv_table =
NULL;
854 s->b_bidir_back_mv_table =
NULL;
855 s->b_direct_mv_table =
NULL;
856 for (
i = 0;
i < 2;
i++) {
857 for (j = 0; j < 2; j++) {
858 for (k = 0; k < 2; k++) {
859 s->b_field_mv_table_base[
i][j][k] =
NULL;
860 s->b_field_mv_table[
i][j][k] =
NULL;
862 s->b_field_select_table[
i][j] =
NULL;
863 s->p_field_mv_table_base[
i][j] =
NULL;
864 s->p_field_mv_table[
i][j] =
NULL;
866 s->p_field_select_table[
i] =
NULL;
869 s->dc_val_base =
NULL;
870 s->coded_block_base =
NULL;
871 s->mbintra_table =
NULL;
873 s->pred_dir_table =
NULL;
875 s->mbskip_table =
NULL;
877 s->er.error_status_table =
NULL;
878 s->er.er_temp_buffer =
NULL;
879 s->mb_index2xy =
NULL;
880 s->lambda_table =
NULL;
895 s->avctx->thread_count : 1;
899 if (
s->encoding &&
s->avctx->slices)
900 nb_slices =
s->avctx->slices;
903 s->mb_height = (
s->height + 31) / 32 * 2;
905 s->mb_height = (
s->height + 15) / 16;
909 "decoding to AV_PIX_FMT_NONE is not supported.\n");
913 if (nb_slices >
MAX_THREADS || (nb_slices >
s->mb_height &&
s->mb_height)) {
920 " reducing to %d\n", nb_slices, max_slices);
921 nb_slices = max_slices;
924 if ((
s->width ||
s->height) &&
941 if (!
s->picture[
i].f)
945 if (!
s->next_picture.f)
948 if (!
s->last_picture.f)
951 if (!
s->current_picture.f)
954 if (!
s->new_picture.f)
960 s->parse_context.state = -1;
962 s->context_initialized = 1;
963 memset(
s->thread_context, 0,
sizeof(
s->thread_context));
964 s->thread_context[0] =
s;
968 for (
i = 0;
i < nb_slices;
i++) {
971 if (!
s->thread_context[
i])
976 s->thread_context[
i]->start_mb_y =
977 (
s->mb_height * (
i) + nb_slices / 2) / nb_slices;
978 s->thread_context[
i]->end_mb_y =
979 (
s->mb_height * (
i + 1) + nb_slices / 2) / nb_slices;
985 s->end_mb_y =
s->mb_height;
987 s->slice_context_count = nb_slices;
1011 av_freep(&
s->b_bidir_forw_mv_table_base);
1012 av_freep(&
s->b_bidir_back_mv_table_base);
1014 s->p_mv_table =
NULL;
1015 s->b_forw_mv_table =
NULL;
1016 s->b_back_mv_table =
NULL;
1017 s->b_bidir_forw_mv_table =
NULL;
1018 s->b_bidir_back_mv_table =
NULL;
1019 s->b_direct_mv_table =
NULL;
1020 for (
i = 0;
i < 2;
i++) {
1021 for (j = 0; j < 2; j++) {
1022 for (k = 0; k < 2; k++) {
1023 av_freep(&
s->b_field_mv_table_base[
i][j][k]);
1024 s->b_field_mv_table[
i][j][k] =
NULL;
1028 s->p_field_mv_table[
i][j] =
NULL;
1049 s->linesize =
s->uvlinesize = 0;
1056 if (!
s->context_initialized)
1059 if (
s->slice_context_count > 1) {
1060 for (
i = 0;
i <
s->slice_context_count;
i++) {
1063 for (
i = 1;
i <
s->slice_context_count;
i++) {
1073 s->picture[
i].needs_realloc = 1;
1076 s->last_picture_ptr =
1077 s->next_picture_ptr =
1078 s->current_picture_ptr =
NULL;
1082 s->mb_height = (
s->height + 31) / 32 * 2;
1084 s->mb_height = (
s->height + 15) / 16;
1086 if ((
s->width ||
s->height) &&
1093 memset(
s->thread_context, 0,
sizeof(
s->thread_context));
1094 s->thread_context[0] =
s;
1096 if (
s->width &&
s->height) {
1097 int nb_slices =
s->slice_context_count;
1098 if (nb_slices > 1) {
1099 for (
i = 0;
i < nb_slices;
i++) {
1102 if (!
s->thread_context[
i]) {
1109 s->thread_context[
i]->start_mb_y =
1110 (
s->mb_height * (
i) + nb_slices / 2) / nb_slices;
1111 s->thread_context[
i]->end_mb_y =
1112 (
s->mb_height * (
i + 1) + nb_slices / 2) / nb_slices;
1119 s->end_mb_y =
s->mb_height;
1121 s->slice_context_count = nb_slices;
1138 if (
s->slice_context_count > 1) {
1139 for (
i = 0;
i <
s->slice_context_count;
i++) {
1142 for (
i = 1;
i <
s->slice_context_count;
i++) {
1145 s->slice_context_count = 1;
1149 s->parse_context.buffer_size = 0;
1152 s->allocated_bitstream_buffer_size = 0;
1177 s->context_initialized = 0;
1178 s->last_picture_ptr =
1179 s->next_picture_ptr =
1180 s->current_picture_ptr =
NULL;
1181 s->linesize =
s->uvlinesize = 0;
1187 int i, h_chroma_shift, v_chroma_shift;
1218 s->last_picture_ptr !=
s->next_picture_ptr &&
1219 s->last_picture_ptr->f->buf[0]) {
1226 if (&
s->picture[
i] !=
s->last_picture_ptr &&
1227 &
s->picture[
i] !=
s->next_picture_ptr &&
1228 s->picture[
i].reference && !
s->picture[
i].needs_realloc) {
1239 if (!
s->picture[
i].reference)
1243 if (
s->current_picture_ptr && !
s->current_picture_ptr->f->buf[0]) {
1246 pic =
s->current_picture_ptr;
1253 pic = &
s->picture[
i];
1257 if (!
s->droppable) {
1267 s->current_picture_ptr = pic;
1269 s->current_picture_ptr->f->top_field_first =
s->top_field_first;
1273 s->current_picture_ptr->f->top_field_first =
1276 s->current_picture_ptr->f->interlaced_frame = !
s->progressive_frame &&
1277 !
s->progressive_sequence;
1278 s->current_picture_ptr->field_picture =
s->picture_structure !=
PICT_FRAME;
1280 s->current_picture_ptr->f->pict_type =
s->pict_type;
1286 s->current_picture_ptr)) < 0)
1290 s->last_picture_ptr =
s->next_picture_ptr;
1292 s->next_picture_ptr =
s->current_picture_ptr;
1294 ff_dlog(
s->avctx,
"L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
1295 s->last_picture_ptr,
s->next_picture_ptr,
s->current_picture_ptr,
1296 s->last_picture_ptr ?
s->last_picture_ptr->f->data[0] :
NULL,
1297 s->next_picture_ptr ?
s->next_picture_ptr->f->data[0] :
NULL,
1298 s->current_picture_ptr ?
s->current_picture_ptr->f->data[0] :
NULL,
1299 s->pict_type,
s->droppable);
1301 if ((!
s->last_picture_ptr || !
s->last_picture_ptr->f->buf[0]) &&
1303 int h_chroma_shift, v_chroma_shift;
1305 &h_chroma_shift, &v_chroma_shift);
1306 if (
s->pict_type ==
AV_PICTURE_TYPE_B &&
s->next_picture_ptr &&
s->next_picture_ptr->f->buf[0])
1308 "allocating dummy last picture for B frame\n");
1311 "warning: first frame is no keyframe\n");
1319 s->last_picture_ptr = &
s->picture[
i];
1321 s->last_picture_ptr->reference = 3;
1322 s->last_picture_ptr->f->key_frame = 0;
1326 s->last_picture_ptr =
NULL;
1332 memset(
s->last_picture_ptr->f->data[0] +
s->last_picture_ptr->f->linesize[0]*
i,
1333 0x80, avctx->
width);
1334 if (
s->last_picture_ptr->f->data[2]) {
1336 memset(
s->last_picture_ptr->f->data[1] +
s->last_picture_ptr->f->linesize[1]*
i,
1338 memset(
s->last_picture_ptr->f->data[2] +
s->last_picture_ptr->f->linesize[2]*
i,
1345 memset(
s->last_picture_ptr->f->data[0] +
s->last_picture_ptr->f->linesize[0]*
i, 16, avctx->
width);
1352 if ((!
s->next_picture_ptr || !
s->next_picture_ptr->f->buf[0]) &&
1360 s->next_picture_ptr = &
s->picture[
i];
1362 s->next_picture_ptr->reference = 3;
1363 s->next_picture_ptr->f->key_frame = 0;
1367 s->next_picture_ptr =
NULL;
1374 #if 0 // BUFREF-FIXME
1375 memset(
s->last_picture.f->data, 0,
sizeof(
s->last_picture.f->data));
1376 memset(
s->next_picture.f->data, 0,
sizeof(
s->next_picture.f->data));
1378 if (
s->last_picture_ptr) {
1379 if (
s->last_picture_ptr->f->buf[0] &&
1381 s->last_picture_ptr)) < 0)
1384 if (
s->next_picture_ptr) {
1385 if (
s->next_picture_ptr->f->buf[0] &&
1387 s->next_picture_ptr)) < 0)
1392 s->last_picture_ptr->f->buf[0]));
1396 for (
i = 0;
i < 4;
i++) {
1398 s->current_picture.f->data[
i] +=
1399 s->current_picture.f->linesize[
i];
1401 s->current_picture.f->linesize[
i] *= 2;
1402 s->last_picture.f->linesize[
i] *= 2;
1403 s->next_picture.f->linesize[
i] *= 2;
1411 s->dct_unquantize_intra =
s->dct_unquantize_mpeg2_intra;
1412 s->dct_unquantize_inter =
s->dct_unquantize_mpeg2_inter;
1414 s->dct_unquantize_intra =
s->dct_unquantize_h263_intra;
1415 s->dct_unquantize_inter =
s->dct_unquantize_h263_inter;
1417 s->dct_unquantize_intra =
s->dct_unquantize_mpeg1_intra;
1418 s->dct_unquantize_inter =
s->dct_unquantize_mpeg1_inter;
1433 if (
s->current_picture.reference)
1441 s->mb_width,
s->mb_height,
s->mb_stride,
s->quarter_sample);
1447 int offset = 2*
s->mb_stride + 1;
1458 int field_based,
int field_select,
1459 int src_x,
int src_y,
1461 int h_edge_pos,
int v_edge_pos,
1463 int motion_x,
int motion_y)
1465 const int lowres =
s->avctx->lowres;
1467 const int s_mask = (2 <<
lowres) - 1;
1471 if (
s->quarter_sample) {
1476 sx = motion_x & s_mask;
1477 sy = motion_y & s_mask;
1478 src_x += motion_x >>
lowres + 1;
1479 src_y += motion_y >>
lowres + 1;
1483 if ((
unsigned)src_x >
FFMAX( h_edge_pos - (!!sx) -
w, 0) ||
1484 (unsigned)src_y >
FFMAX((v_edge_pos >> field_based) - (!!sy) -
h, 0)) {
1485 s->vdsp.emulated_edge_mc(
s->sc.edge_emu_buffer,
src,
1486 s->linesize,
s->linesize,
1487 w + 1, (
h + 1) << field_based,
1488 src_x, src_y << field_based,
1489 h_edge_pos, v_edge_pos);
1490 src =
s->sc.edge_emu_buffer;
1494 sx = (sx << 2) >>
lowres;
1495 sy = (sy << 2) >>
lowres;
1498 pix_op[op_index](dest,
src,
stride,
h, sx, sy);
1512 int motion_x,
int motion_y,
1515 uint8_t *ptr_y, *ptr_cb, *ptr_cr;
1516 int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, sx, sy, uvsx, uvsy;
1518 const int lowres =
s->avctx->lowres;
1519 const int op_index =
FFMIN(
lowres-1+
s->chroma_x_shift, 3);
1520 const int block_s = 8>>
lowres;
1521 const int s_mask = (2 <<
lowres) - 1;
1522 const int h_edge_pos =
s->h_edge_pos >>
lowres;
1523 const int v_edge_pos =
s->v_edge_pos >>
lowres;
1524 linesize =
s->current_picture.f->linesize[0] << field_based;
1525 uvlinesize =
s->current_picture.f->linesize[1] << field_based;
1528 if (
s->quarter_sample) {
1534 motion_y += (bottom_field - field_select)*((1 <<
lowres)-1);
1537 sx = motion_x & s_mask;
1538 sy = motion_y & s_mask;
1539 src_x =
s->mb_x * 2 * block_s + (motion_x >>
lowres + 1);
1540 src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >>
lowres + 1);
1543 uvsx = ((motion_x >> 1) & s_mask) | (sx & 1);
1544 uvsy = ((motion_y >> 1) & s_mask) | (sy & 1);
1545 uvsrc_x = src_x >> 1;
1546 uvsrc_y = src_y >> 1;
1551 uvsx = (2 * mx) & s_mask;
1552 uvsy = (2 * my) & s_mask;
1553 uvsrc_x =
s->mb_x * block_s + (mx >>
lowres);
1554 uvsrc_y = mb_y * block_s + (my >>
lowres);
1556 if(
s->chroma_y_shift){
1561 uvsrc_x =
s->mb_x * block_s + (mx >>
lowres + 1);
1562 uvsrc_y = (mb_y * block_s >> field_based) + (my >>
lowres + 1);
1564 if(
s->chroma_x_shift){
1568 uvsy = motion_y & s_mask;
1570 uvsrc_x =
s->mb_x*block_s + (mx >> (
lowres+1));
1573 uvsx = motion_x & s_mask;
1574 uvsy = motion_y & s_mask;
1581 ptr_y = ref_picture[0] + src_y *
linesize + src_x;
1582 ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
1583 ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
1585 if ((
unsigned) src_x >
FFMAX( h_edge_pos - (!!sx) - 2 * block_s, 0) || uvsrc_y<0 ||
1586 (
unsigned) src_y >
FFMAX((v_edge_pos >> field_based) - (!!sy) -
h, 0)) {
1587 s->vdsp.emulated_edge_mc(
s->sc.edge_emu_buffer, ptr_y,
1589 17, 17 + field_based,
1590 src_x, src_y << field_based, h_edge_pos,
1592 ptr_y =
s->sc.edge_emu_buffer;
1594 uint8_t *ubuf =
s->sc.edge_emu_buffer + 18 *
s->linesize;
1595 uint8_t *vbuf =ubuf + 10 *
s->uvlinesize;
1597 vbuf -=
s->uvlinesize;
1598 s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
1599 uvlinesize >> field_based, uvlinesize >> field_based,
1601 uvsrc_x, uvsrc_y << field_based,
1602 h_edge_pos >> 1, v_edge_pos >> 1);
1603 s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
1604 uvlinesize >> field_based,uvlinesize >> field_based,
1606 uvsrc_x, uvsrc_y << field_based,
1607 h_edge_pos >> 1, v_edge_pos >> 1);
1615 dest_y +=
s->linesize;
1616 dest_cb +=
s->uvlinesize;
1617 dest_cr +=
s->uvlinesize;
1621 ptr_y +=
s->linesize;
1622 ptr_cb +=
s->uvlinesize;
1623 ptr_cr +=
s->uvlinesize;
1626 sx = (sx << 2) >>
lowres;
1627 sy = (sy << 2) >>
lowres;
1631 int hc =
s->chroma_y_shift ? (
h+1-bottom_field)>>1 :
h;
1632 uvsx = (uvsx << 2) >>
lowres;
1633 uvsy = (uvsy << 2) >>
lowres;
1635 pix_op[op_index](dest_cb, ptr_cb, uvlinesize, hc, uvsx, uvsy);
1636 pix_op[op_index](dest_cr, ptr_cr, uvlinesize, hc, uvsx, uvsy);
1648 const int lowres =
s->avctx->lowres;
1650 const int block_s = 8 >>
lowres;
1651 const int s_mask = (2 <<
lowres) - 1;
1652 const int h_edge_pos =
s->h_edge_pos >>
lowres + 1;
1653 const int v_edge_pos =
s->v_edge_pos >>
lowres + 1;
1654 int emu = 0, src_x, src_y, sx, sy;
1658 if (
s->quarter_sample) {
1670 src_x =
s->mb_x * block_s + (mx >>
lowres + 1);
1671 src_y =
s->mb_y * block_s + (my >>
lowres + 1);
1673 offset = src_y *
s->uvlinesize + src_x;
1674 ptr = ref_picture[1] +
offset;
1675 if ((
unsigned) src_x >
FFMAX(h_edge_pos - (!!sx) - block_s, 0) ||
1676 (unsigned) src_y >
FFMAX(v_edge_pos - (!!sy) - block_s, 0)) {
1677 s->vdsp.emulated_edge_mc(
s->sc.edge_emu_buffer, ptr,
1678 s->uvlinesize,
s->uvlinesize,
1680 src_x, src_y, h_edge_pos, v_edge_pos);
1681 ptr =
s->sc.edge_emu_buffer;
1684 sx = (sx << 2) >>
lowres;
1685 sy = (sy << 2) >>
lowres;
1686 pix_op[op_index](dest_cb, ptr,
s->uvlinesize, block_s, sx, sy);
1688 ptr = ref_picture[2] +
offset;
1690 s->vdsp.emulated_edge_mc(
s->sc.edge_emu_buffer, ptr,
1691 s->uvlinesize,
s->uvlinesize,
1693 src_x, src_y, h_edge_pos, v_edge_pos);
1694 ptr =
s->sc.edge_emu_buffer;
1696 pix_op[op_index](dest_cr, ptr,
s->uvlinesize, block_s, sx, sy);
1713 int dir,
uint8_t **ref_picture,
1718 const int lowres =
s->avctx->lowres;
1719 const int block_s = 8 >>
lowres;
1724 switch (
s->mv_type) {
1728 ref_picture, pix_op,
1729 s->mv[dir][0][0],
s->mv[dir][0][1],
1735 for (
i = 0;
i < 4;
i++) {
1737 s->linesize) * block_s,
1738 ref_picture[0], 0, 0,
1739 (2 * mb_x + (
i & 1)) * block_s,
1740 (2 * mb_y + (
i >> 1)) * block_s,
1741 s->width,
s->height,
s->linesize,
1743 block_s, block_s, pix_op,
1744 s->mv[dir][
i][0],
s->mv[dir][
i][1]);
1746 mx +=
s->mv[dir][
i][0];
1747 my +=
s->mv[dir][
i][1];
1758 1, 0,
s->field_select[dir][0],
1759 ref_picture, pix_op,
1760 s->mv[dir][0][0],
s->mv[dir][0][1],
1764 1, 1,
s->field_select[dir][1],
1765 ref_picture, pix_op,
1766 s->mv[dir][1][0],
s->mv[dir][1][1],
1769 if (
s->picture_structure !=
s->field_select[dir][0] + 1 &&
1771 ref_picture =
s->current_picture_ptr->f->data;
1775 0, 0,
s->field_select[dir][0],
1776 ref_picture, pix_op,
1778 s->mv[dir][0][1], 2 * block_s, mb_y >> 1);
1782 for (
i = 0;
i < 2;
i++) {
1785 if (
s->picture_structure ==
s->field_select[dir][
i] + 1 ||
1787 ref2picture = ref_picture;
1789 ref2picture =
s->current_picture_ptr->f->data;
1793 0, 0,
s->field_select[dir][
i],
1794 ref2picture, pix_op,
1795 s->mv[dir][
i][0],
s->mv[dir][
i][1] +
1796 2 * block_s *
i, block_s, mb_y >> 1);
1798 dest_y += 2 * block_s *
s->linesize;
1799 dest_cb += (2 * block_s >>
s->chroma_y_shift) *
s->uvlinesize;
1800 dest_cr += (2 * block_s >>
s->chroma_y_shift) *
s->uvlinesize;
1805 for (
i = 0;
i < 2;
i++) {
1807 for (j = 0; j < 2; j++) {
1810 ref_picture, pix_op,
1811 s->mv[dir][2 *
i + j][0],
1812 s->mv[dir][2 *
i + j][1],
1815 pix_op =
s->h264chroma.avg_h264_chroma_pixels_tab;
1818 for (
i = 0;
i < 2;
i++) {
1820 0, 0,
s->picture_structure !=
i + 1,
1821 ref_picture, pix_op,
1822 s->mv[dir][2 *
i][0],
s->mv[dir][2 *
i][1],
1823 2 * block_s, mb_y >> 1);
1826 pix_op =
s->h264chroma.avg_h264_chroma_pixels_tab;
1830 if (!
s->first_field) {
1831 ref_picture =
s->current_picture_ptr->f->data;
1846 int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !
s->quarter_sample;
1847 int my, off,
i, mvs;
1852 switch (
s->mv_type) {
1866 for (
i = 0;
i < mvs;
i++) {
1867 my =
s->mv[dir][
i][1];
1868 my_max =
FFMAX(my_max, my);
1869 my_min =
FFMIN(my_min, my);
1872 off = ((
FFMAX(-my_min, my_max)<<qpel_shift) + 63) >> 6;
1874 return av_clip(
s->mb_y + off, 0,
s->mb_height - 1);
1876 return s->mb_height-1;
1881 int16_t *
block,
int i,
uint8_t *dest,
int line_size,
int qscale)
1883 s->dct_unquantize_intra(
s,
block,
i, qscale);
1884 s->idsp.idct_put(dest, line_size,
block);
1891 if (
s->block_last_index[
i] >= 0) {
1892 s->idsp.idct_add(dest, line_size,
block);
1897 int16_t *
block,
int i,
uint8_t *dest,
int line_size,
int qscale)
1899 if (
s->block_last_index[
i] >= 0) {
1900 s->dct_unquantize_inter(
s,
block,
i, qscale);
1902 s->idsp.idct_add(dest, line_size,
block);
1911 int wrap =
s->b8_stride;
1912 int xy =
s->block_index[0];
1915 s->dc_val[0][xy + 1 ] =
1916 s->dc_val[0][xy +
wrap] =
1917 s->dc_val[0][xy + 1 +
wrap] = 1024;
1919 memset(
s->ac_val[0][xy ], 0, 32 *
sizeof(int16_t));
1920 memset(
s->ac_val[0][xy +
wrap], 0, 32 *
sizeof(int16_t));
1921 if (
s->msmpeg4_version>=3) {
1922 s->coded_block[xy ] =
1923 s->coded_block[xy + 1 ] =
1924 s->coded_block[xy +
wrap] =
1925 s->coded_block[xy + 1 +
wrap] = 0;
1928 wrap =
s->mb_stride;
1929 xy =
s->mb_x +
s->mb_y *
wrap;
1931 s->dc_val[2][xy] = 1024;
1933 memset(
s->ac_val[1][xy], 0, 16 *
sizeof(int16_t));
1934 memset(
s->ac_val[2][xy], 0, 16 *
sizeof(int16_t));
1936 s->mbintra_table[xy]= 0;
1951 int lowres_flag,
int is_mpeg12)
1953 const int mb_xy =
s->mb_y *
s->mb_stride +
s->mb_x;
1956 s->avctx->hwaccel &&
s->avctx->hwaccel->decode_mb) {
1957 s->avctx->hwaccel->decode_mb(
s);
1966 for(j=0; j<64; j++){
1968 block[
i][
s->idsp.idct_permutation[j]]);
1974 s->current_picture.qscale_table[mb_xy] =
s->qscale;
1978 if (!is_mpeg12 && (
s->h263_pred ||
s->h263_aic)) {
1979 if(
s->mbintra_table[mb_xy])
1984 s->last_dc[2] = 128 <<
s->intra_dc_precision;
1987 else if (!is_mpeg12 && (
s->h263_pred ||
s->h263_aic))
1988 s->mbintra_table[mb_xy]=1;
1993 uint8_t *dest_y, *dest_cb, *dest_cr;
1994 int dct_linesize, dct_offset;
1997 const int linesize =
s->current_picture.f->linesize[0];
1998 const int uvlinesize =
s->current_picture.f->linesize[1];
1999 const int readable=
s->pict_type !=
AV_PICTURE_TYPE_B ||
s->encoding ||
s->avctx->draw_horiz_band || lowres_flag;
2000 const int block_size= lowres_flag ? 8>>
s->avctx->lowres : 8;
2005 uint8_t *mbskip_ptr = &
s->mbskip_table[mb_xy];
2007 if (
s->mb_skipped) {
2011 }
else if(!
s->current_picture.reference) {
2018 dct_linesize =
linesize <<
s->interlaced_dct;
2023 dest_cb=
s->dest[1];
2024 dest_cr=
s->dest[2];
2026 dest_y =
s->sc.b_scratchpad;
2027 dest_cb=
s->sc.b_scratchpad+16*
linesize;
2028 dest_cr=
s->sc.b_scratchpad+32*
linesize;
2054 op_pix =
s->h264chroma.avg_h264_chroma_pixels_tab;
2060 op_qpix =
s->me.qpel_put;
2062 op_pix =
s->hdsp.put_pixels_tab;
2064 op_pix =
s->hdsp.put_no_rnd_pixels_tab;
2067 ff_mpv_motion(
s, dest_y, dest_cb, dest_cr, 0,
s->last_picture.f->data, op_pix, op_qpix);
2068 op_pix =
s->hdsp.avg_pixels_tab;
2069 op_qpix=
s->me.qpel_avg;
2072 ff_mpv_motion(
s, dest_y, dest_cb, dest_cr, 1,
s->next_picture.f->data, op_pix, op_qpix);
2078 if(
s->avctx->skip_idct){
2094 if (
s->chroma_y_shift){
2109 add_dct(
s,
block[2], 2, dest_y + dct_offset , dct_linesize);
2110 add_dct(
s,
block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
2113 if(
s->chroma_y_shift){
2118 dct_linesize = uvlinesize <<
s->interlaced_dct;
2119 dct_offset =
s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2125 if(!
s->chroma_x_shift){
2128 add_dct(
s,
block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
2129 add_dct(
s,
block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
2140 if (
s->avctx->bits_per_raw_sample > 8){
2141 const int act_block_size = block_size * 2;
2143 if(
s->dpcm_direction == 0) {
2144 s->idsp.idct_put(dest_y, dct_linesize, (int16_t*)(*
s->block32)[0]);
2145 s->idsp.idct_put(dest_y + act_block_size, dct_linesize, (int16_t*)(*
s->block32)[1]);
2146 s->idsp.idct_put(dest_y + dct_offset, dct_linesize, (int16_t*)(*
s->block32)[2]);
2147 s->idsp.idct_put(dest_y + dct_offset + act_block_size, dct_linesize, (int16_t*)(*
s->block32)[3]);
2149 dct_linesize = uvlinesize <<
s->interlaced_dct;
2150 dct_offset =
s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2152 s->idsp.idct_put(dest_cb, dct_linesize, (int16_t*)(*
s->block32)[4]);
2153 s->idsp.idct_put(dest_cr, dct_linesize, (int16_t*)(*
s->block32)[5]);
2154 s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, (int16_t*)(*
s->block32)[6]);
2155 s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, (int16_t*)(*
s->block32)[7]);
2156 if(!
s->chroma_x_shift){
2157 s->idsp.idct_put(dest_cb + act_block_size, dct_linesize, (int16_t*)(*
s->block32)[8]);
2158 s->idsp.idct_put(dest_cr + act_block_size, dct_linesize, (int16_t*)(*
s->block32)[9]);
2159 s->idsp.idct_put(dest_cb + act_block_size + dct_offset, dct_linesize, (int16_t*)(*
s->block32)[10]);
2160 s->idsp.idct_put(dest_cr + act_block_size + dct_offset, dct_linesize, (int16_t*)(*
s->block32)[11]);
2162 }
else if(
s->dpcm_direction == 1) {
2164 uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr};
2165 int linesize[3] = {dct_linesize, uvlinesize, uvlinesize};
2166 for(
i = 0;
i < 3;
i++) {
2168 int vsub =
i ?
s->chroma_y_shift : 0;
2169 int hsub =
i ?
s->chroma_x_shift : 0;
2170 for(
h = 0;
h < (16 >> vsub);
h++){
2171 for(
w = 0;
w < (16 >>
hsub);
w++)
2172 dest_pcm[
i][
w] = (*
s->dpcm_macroblock)[
i][idx++];
2176 }
else if(
s->dpcm_direction == -1) {
2178 uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr};
2179 int linesize[3] = {dct_linesize, uvlinesize, uvlinesize};
2180 for(
i = 0;
i < 3;
i++) {
2182 int vsub =
i ?
s->chroma_y_shift : 0;
2183 int hsub =
i ?
s->chroma_x_shift : 0;
2184 dest_pcm[
i] += (
linesize[
i] / 2) * ((16 >> vsub) - 1);
2185 for(
h = (16 >> vsub)-1;
h >= 1;
h--){
2186 for(
w = (16 >>
hsub)-1;
w >= 1;
w--)
2187 dest_pcm[
i][
w] = (*
s->dpcm_macroblock)[
i][idx++];
2196 put_dct(
s,
block[1], 1, dest_y + block_size, dct_linesize,
s->qscale);
2197 put_dct(
s,
block[2], 2, dest_y + dct_offset , dct_linesize,
s->qscale);
2198 put_dct(
s,
block[3], 3, dest_y + dct_offset + block_size, dct_linesize,
s->qscale);
2201 if(
s->chroma_y_shift){
2207 put_dct(
s,
block[4], 4, dest_cb, dct_linesize,
s->chroma_qscale);
2208 put_dct(
s,
block[5], 5, dest_cr, dct_linesize,
s->chroma_qscale);
2209 put_dct(
s,
block[6], 6, dest_cb + dct_offset, dct_linesize,
s->chroma_qscale);
2210 put_dct(
s,
block[7], 7, dest_cr + dct_offset, dct_linesize,
s->chroma_qscale);
2214 s->idsp.idct_put(dest_y, dct_linesize,
block[0]);
2215 s->idsp.idct_put(dest_y + block_size, dct_linesize,
block[1]);
2216 s->idsp.idct_put(dest_y + dct_offset, dct_linesize,
block[2]);
2217 s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize,
block[3]);
2220 if(
s->chroma_y_shift){
2221 s->idsp.idct_put(dest_cb, uvlinesize,
block[4]);
2222 s->idsp.idct_put(dest_cr, uvlinesize,
block[5]);
2225 dct_linesize = uvlinesize <<
s->interlaced_dct;
2226 dct_offset =
s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
2228 s->idsp.idct_put(dest_cb, dct_linesize,
block[4]);
2229 s->idsp.idct_put(dest_cr, dct_linesize,
block[5]);
2230 s->idsp.idct_put(dest_cb + dct_offset, dct_linesize,
block[6]);
2231 s->idsp.idct_put(dest_cr + dct_offset, dct_linesize,
block[7]);
2232 if(!
s->chroma_x_shift){
2233 s->idsp.idct_put(dest_cb + block_size, dct_linesize,
block[8]);
2234 s->idsp.idct_put(dest_cr + block_size, dct_linesize,
block[9]);
2235 s->idsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize,
block[10]);
2236 s->idsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize,
block[11]);
2244 s->hdsp.put_pixels_tab[0][0](
s->dest[0], dest_y ,
linesize,16);
2246 s->hdsp.put_pixels_tab[
s->chroma_x_shift][0](
s->dest[1], dest_cb, uvlinesize,16 >>
s->chroma_y_shift);
2247 s->hdsp.put_pixels_tab[
s->chroma_x_shift][0](
s->dest[2], dest_cr, uvlinesize,16 >>
s->chroma_y_shift);
2268 s->last_picture_ptr ?
s->last_picture_ptr->f :
NULL, y,
h,
s->picture_structure,
2269 s->first_field,
s->low_delay);
2273 const int linesize =
s->current_picture.f->linesize[0];
2274 const int uvlinesize =
s->current_picture.f->linesize[1];
2275 const int width_of_mb = (4 + (
s->avctx->bits_per_raw_sample > 8)) -
s->avctx->lowres;
2276 const int height_of_mb = 4 -
s->avctx->lowres;
2278 s->block_index[0]=
s->b8_stride*(
s->mb_y*2 ) - 2 +
s->mb_x*2;
2279 s->block_index[1]=
s->b8_stride*(
s->mb_y*2 ) - 1 +
s->mb_x*2;
2280 s->block_index[2]=
s->b8_stride*(
s->mb_y*2 + 1) - 2 +
s->mb_x*2;
2281 s->block_index[3]=
s->b8_stride*(
s->mb_y*2 + 1) - 1 +
s->mb_x*2;
2282 s->block_index[4]=
s->mb_stride*(
s->mb_y + 1) +
s->b8_stride*
s->mb_height*2 +
s->mb_x - 1;
2283 s->block_index[5]=
s->mb_stride*(
s->mb_y +
s->mb_height + 2) +
s->b8_stride*
s->mb_height*2 +
s->mb_x - 1;
2286 s->dest[0] =
s->current_picture.f->data[0] + (
int)((
s->mb_x - 1
U) << width_of_mb);
2287 s->dest[1] =
s->current_picture.f->data[1] + (
int)((
s->mb_x - 1
U) << (width_of_mb -
s->chroma_x_shift));
2288 s->dest[2] =
s->current_picture.f->data[2] + (
int)((
s->mb_x - 1
U) << (width_of_mb -
s->chroma_x_shift));
2293 s->dest[0] +=
s->mb_y *
linesize << height_of_mb;
2294 s->dest[1] +=
s->mb_y * uvlinesize << (height_of_mb -
s->chroma_y_shift);
2295 s->dest[2] +=
s->mb_y * uvlinesize << (height_of_mb -
s->chroma_y_shift);
2297 s->dest[0] += (
s->mb_y>>1) *
linesize << height_of_mb;
2298 s->dest[1] += (
s->mb_y>>1) * uvlinesize << (height_of_mb -
s->chroma_y_shift);
2299 s->dest[2] += (
s->mb_y>>1) * uvlinesize << (height_of_mb -
s->chroma_y_shift);
2309 if (!
s || !
s->picture)
2314 s->current_picture_ptr =
s->last_picture_ptr =
s->next_picture_ptr =
NULL;
2320 s->mb_x=
s->mb_y= 0;
2323 s->parse_context.state= -1;
2324 s->parse_context.frame_start_found= 0;
2325 s->parse_context.overread= 0;
2326 s->parse_context.overread_index= 0;
2327 s->parse_context.index= 0;
2328 s->parse_context.last_index= 0;
2329 s->bitstream_buffer_size=0;
2340 else if (qscale > 31)
2344 s->chroma_qscale=
s->chroma_qscale_table[qscale];
2346 s->y_dc_scale=
s->y_dc_scale_table[ qscale ];
2347 s->c_dc_scale=
s->c_dc_scale_table[
s->chroma_qscale ];