#include "thread.h"
#include <limits.h>
-static void dct_unquantize_mpeg1_intra_c(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-static void dct_unquantize_h263_intra_c(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-static void dct_unquantize_h263_inter_c(MpegEncContext *s,
- int16_t *block, int n, int qscale);
-
static const uint8_t ff_default_chroma_qscale_table[32] = {
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
AV_PIX_FMT_NONE
};
+static void dct_unquantize_mpeg1_intra_c(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, nCoeffs;
+ const uint16_t *quant_matrix;
+
+ nCoeffs= s->block_last_index[n];
+
+ if (n < 4)
+ block[0] = block[0] * s->y_dc_scale;
+ else
+ block[0] = block[0] * s->c_dc_scale;
+ /* XXX: only mpeg1 */
+ quant_matrix = s->intra_matrix;
+ for(i=1;i<=nCoeffs;i++) {
+ int j= s->intra_scantable.permutated[i];
+ level = block[j];
+ if (level) {
+ if (level < 0) {
+ level = -level;
+ level = (int)(level * qscale * quant_matrix[j]) >> 3;
+ level = (level - 1) | 1;
+ level = -level;
+ } else {
+ level = (int)(level * qscale * quant_matrix[j]) >> 3;
+ level = (level - 1) | 1;
+ }
+ block[j] = level;
+ }
+ }
+}
+
+static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, nCoeffs;
+ const uint16_t *quant_matrix;
+
+ nCoeffs= s->block_last_index[n];
+
+ quant_matrix = s->inter_matrix;
+ for(i=0; i<=nCoeffs; i++) {
+ int j= s->intra_scantable.permutated[i];
+ level = block[j];
+ if (level) {
+ if (level < 0) {
+ level = -level;
+ level = (((level << 1) + 1) * qscale *
+ ((int) (quant_matrix[j]))) >> 4;
+ level = (level - 1) | 1;
+ level = -level;
+ } else {
+ level = (((level << 1) + 1) * qscale *
+ ((int) (quant_matrix[j]))) >> 4;
+ level = (level - 1) | 1;
+ }
+ block[j] = level;
+ }
+ }
+}
+
+static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, nCoeffs;
+ const uint16_t *quant_matrix;
+
+ if(s->alternate_scan) nCoeffs= 63;
+ else nCoeffs= s->block_last_index[n];
+
+ if (n < 4)
+ block[0] = block[0] * s->y_dc_scale;
+ else
+ block[0] = block[0] * s->c_dc_scale;
+ quant_matrix = s->intra_matrix;
+ for(i=1;i<=nCoeffs;i++) {
+ int j= s->intra_scantable.permutated[i];
+ level = block[j];
+ if (level) {
+ if (level < 0) {
+ level = -level;
+ level = (int)(level * qscale * quant_matrix[j]) >> 3;
+ level = -level;
+ } else {
+ level = (int)(level * qscale * quant_matrix[j]) >> 3;
+ }
+ block[j] = level;
+ }
+ }
+}
+
+static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, nCoeffs;
+ const uint16_t *quant_matrix;
+ int sum=-1;
+
+ if(s->alternate_scan) nCoeffs= 63;
+ else nCoeffs= s->block_last_index[n];
+
+ if (n < 4)
+ block[0] = block[0] * s->y_dc_scale;
+ else
+ block[0] = block[0] * s->c_dc_scale;
+ quant_matrix = s->intra_matrix;
+ for(i=1;i<=nCoeffs;i++) {
+ int j= s->intra_scantable.permutated[i];
+ level = block[j];
+ if (level) {
+ if (level < 0) {
+ level = -level;
+ level = (int)(level * qscale * quant_matrix[j]) >> 3;
+ level = -level;
+ } else {
+ level = (int)(level * qscale * quant_matrix[j]) >> 3;
+ }
+ block[j] = level;
+ sum+=level;
+ }
+ }
+ block[63]^=sum&1;
+}
+
+static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, nCoeffs;
+ const uint16_t *quant_matrix;
+ int sum=-1;
+
+ if(s->alternate_scan) nCoeffs= 63;
+ else nCoeffs= s->block_last_index[n];
+
+ quant_matrix = s->inter_matrix;
+ for(i=0; i<=nCoeffs; i++) {
+ int j= s->intra_scantable.permutated[i];
+ level = block[j];
+ if (level) {
+ if (level < 0) {
+ level = -level;
+ level = (((level << 1) + 1) * qscale *
+ ((int) (quant_matrix[j]))) >> 4;
+ level = -level;
+ } else {
+ level = (((level << 1) + 1) * qscale *
+ ((int) (quant_matrix[j]))) >> 4;
+ }
+ block[j] = level;
+ sum+=level;
+ }
+ }
+ block[63]^=sum&1;
+}
+
+static void dct_unquantize_h263_intra_c(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, qmul, qadd;
+ int nCoeffs;
+
+ assert(s->block_last_index[n]>=0);
+
+ qmul = qscale << 1;
+
+ if (!s->h263_aic) {
+ if (n < 4)
+ block[0] = block[0] * s->y_dc_scale;
+ else
+ block[0] = block[0] * s->c_dc_scale;
+ qadd = (qscale - 1) | 1;
+ }else{
+ qadd = 0;
+ }
+ if(s->ac_pred)
+ nCoeffs=63;
+ else
+ nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
+
+ for(i=1; i<=nCoeffs; i++) {
+ level = block[i];
+ if (level) {
+ if (level < 0) {
+ level = level * qmul - qadd;
+ } else {
+ level = level * qmul + qadd;
+ }
+ block[i] = level;
+ }
+ }
+}
+
+static void dct_unquantize_h263_inter_c(MpegEncContext *s,
+ int16_t *block, int n, int qscale)
+{
+ int i, level, qmul, qadd;
+ int nCoeffs;
+
+ assert(s->block_last_index[n]>=0);
+
+ qadd = (qscale - 1) | 1;
+ qmul = qscale << 1;
+
+ nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
+
+ for(i=0; i<=nCoeffs; i++) {
+ level = block[i];
+ if (level) {
+ if (level < 0) {
+ level = level * qmul - qadd;
+ } else {
+ level = level * qmul + qadd;
+ }
+ block[i] = level;
+ }
+ }
+}
+
static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
int (*mv)[2][4][2],
int mb_x, int mb_y, int mb_intra, int mb_skipped)
if (ARCH_ARM)
ff_MPV_common_init_arm(s);
- if (ARCH_BFIN)
- ff_MPV_common_init_bfin(s);
if (ARCH_PPC)
ff_MPV_common_init_ppc(s);
if (ARCH_X86)
return 0;
}
-int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize)
+static int frame_size_alloc(MpegEncContext *s, int linesize)
{
int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
}
if (!s->edge_emu_buffer &&
- (ret = ff_mpv_frame_size_alloc(s, pic->f.linesize[0])) < 0) {
+ (ret = frame_size_alloc(s, pic->f.linesize[0])) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"get_buffer() failed to allocate context scratch buffers.\n");
ff_mpeg_unref_picture(s, pic);
if (dst->avctx->codec_tag == AV_RL32("VCR2"))
exchange_uv(dst);
if (!dst->edge_emu_buffer &&
- (ret = ff_mpv_frame_size_alloc(dst, dst->linesize)) < 0) {
+ (ret = frame_size_alloc(dst, dst->linesize)) < 0) {
av_log(dst->avctx, AV_LOG_ERROR, "failed to allocate context "
"scratch buffers.\n");
return ret;
// linesize dependend scratch buffer allocation
if (!s->edge_emu_buffer)
if (s1->linesize) {
- if (ff_mpv_frame_size_alloc(s, s1->linesize) < 0) {
+ if (frame_size_alloc(s, s1->linesize) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context "
"scratch buffers.\n");
return AVERROR(ENOMEM);
FF_ALLOCZ_OR_GOTO(s->avctx, s->picture,
MAX_PICTURE_COUNT * sizeof(Picture), fail);
for (i = 0; i < MAX_PICTURE_COUNT; i++) {
- avcodec_get_frame_defaults(&s->picture[i].f);
+ av_frame_unref(&s->picture[i].f);
}
memset(&s->next_picture, 0, sizeof(s->next_picture));
memset(&s->last_picture, 0, sizeof(s->last_picture));
memset(&s->current_picture, 0, sizeof(s->current_picture));
- avcodec_get_frame_defaults(&s->next_picture.f);
- avcodec_get_frame_defaults(&s->last_picture.f);
- avcodec_get_frame_defaults(&s->current_picture.f);
+ av_frame_unref(&s->next_picture.f);
+ av_frame_unref(&s->last_picture.f);
+ av_frame_unref(&s->current_picture.f);
if (s->width && s->height) {
if (init_context_frame(s))
}
}
-void ff_release_unused_pictures(MpegEncContext*s, int remove_current)
+static void release_unused_pictures(MpegEncContext *s)
{
int i;
/* release non reference frames */
for (i = 0; i < MAX_PICTURE_COUNT; i++) {
- if (!s->picture[i].reference &&
- (remove_current || &s->picture[i] != s->current_picture_ptr)) {
+ if (!s->picture[i].reference)
ff_mpeg_unref_picture(s, &s->picture[i]);
- }
}
}
s->picture[ret].needs_realloc = 0;
ff_free_picture_tables(&s->picture[ret]);
ff_mpeg_unref_picture(s, &s->picture[ret]);
- avcodec_get_frame_defaults(&s->picture[ret].f);
}
}
return ret;
}
-static void update_noise_reduction(MpegEncContext *s)
-{
- int intra, i;
-
- for (intra = 0; intra < 2; intra++) {
- if (s->dct_count[intra] > (1 << 16)) {
- for (i = 0; i < 64; i++) {
- s->dct_error_sum[intra][i] >>= 1;
- }
- s->dct_count[intra] >>= 1;
- }
-
- for (i = 0; i < 64; i++) {
- s->dct_offset[intra][i] = (s->avctx->noise_reduction *
- s->dct_count[intra] +
- s->dct_error_sum[intra][i] / 2) /
- (s->dct_error_sum[intra][i] + 1);
- }
- }
-}
-
/**
- * generic function for encode/decode called after coding/decoding
- * the header and before a frame is coded/decoded.
+ * generic function called after decoding
+ * the header and before a frame is decoded.
*/
int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
{
/* release forgotten pictures */
/* if (mpeg124/h263) */
- if (!s->encoding) {
- for (i = 0; i < MAX_PICTURE_COUNT; i++) {
- if (&s->picture[i] != s->last_picture_ptr &&
- &s->picture[i] != s->next_picture_ptr &&
- s->picture[i].reference && !s->picture[i].needs_realloc) {
- if (!(avctx->active_thread_type & FF_THREAD_FRAME))
- av_log(avctx, AV_LOG_ERROR,
- "releasing zombie picture\n");
- ff_mpeg_unref_picture(s, &s->picture[i]);
- }
+ for (i = 0; i < MAX_PICTURE_COUNT; i++) {
+ if (&s->picture[i] != s->last_picture_ptr &&
+ &s->picture[i] != s->next_picture_ptr &&
+ s->picture[i].reference && !s->picture[i].needs_realloc) {
+ if (!(avctx->active_thread_type & FF_THREAD_FRAME))
+ av_log(avctx, AV_LOG_ERROR,
+ "releasing zombie picture\n");
+ ff_mpeg_unref_picture(s, &s->picture[i]);
}
}
ff_mpeg_unref_picture(s, &s->current_picture);
- if (!s->encoding) {
- ff_release_unused_pictures(s, 1);
+ release_unused_pictures(s);
- if (s->current_picture_ptr &&
- s->current_picture_ptr->f.buf[0] == NULL) {
- // we already have a unused image
- // (maybe it was set before reading the header)
- pic = s->current_picture_ptr;
- } else {
- i = ff_find_unused_picture(s, 0);
- if (i < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
- return i;
- }
- pic = &s->picture[i];
+ if (s->current_picture_ptr &&
+ s->current_picture_ptr->f.buf[0] == NULL) {
+ // we already have a unused image
+ // (maybe it was set before reading the header)
+ pic = s->current_picture_ptr;
+ } else {
+ i = ff_find_unused_picture(s, 0);
+ if (i < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
+ return i;
}
+ pic = &s->picture[i];
+ }
- pic->reference = 0;
- if (!s->droppable) {
- if (s->pict_type != AV_PICTURE_TYPE_B)
- pic->reference = 3;
- }
+ pic->reference = 0;
+ if (!s->droppable) {
+ if (s->pict_type != AV_PICTURE_TYPE_B)
+ pic->reference = 3;
+ }
- pic->f.coded_picture_number = s->coded_picture_number++;
+ pic->f.coded_picture_number = s->coded_picture_number++;
- if (ff_alloc_picture(s, pic, 0) < 0)
- return -1;
+ if (ff_alloc_picture(s, pic, 0) < 0)
+ return -1;
- s->current_picture_ptr = pic;
- // FIXME use only the vars from current_pic
- s->current_picture_ptr->f.top_field_first = s->top_field_first;
- if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
- s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
- if (s->picture_structure != PICT_FRAME)
- s->current_picture_ptr->f.top_field_first =
- (s->picture_structure == PICT_TOP_FIELD) == s->first_field;
- }
- s->current_picture_ptr->f.interlaced_frame = !s->progressive_frame &&
- !s->progressive_sequence;
- s->current_picture_ptr->field_picture = s->picture_structure != PICT_FRAME;
+ s->current_picture_ptr = pic;
+ // FIXME use only the vars from current_pic
+ s->current_picture_ptr->f.top_field_first = s->top_field_first;
+ if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
+ s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
+ if (s->picture_structure != PICT_FRAME)
+ s->current_picture_ptr->f.top_field_first =
+ (s->picture_structure == PICT_TOP_FIELD) == s->first_field;
}
+ s->current_picture_ptr->f.interlaced_frame = !s->progressive_frame &&
+ !s->progressive_sequence;
+ s->current_picture_ptr->field_picture = s->picture_structure != PICT_FRAME;
s->current_picture_ptr->f.pict_type = s->pict_type;
// if (s->flags && CODEC_FLAG_QSCALE)
return i;
}
s->last_picture_ptr = &s->picture[i];
+
+ s->last_picture_ptr->reference = 3;
+ s->last_picture_ptr->f.pict_type = AV_PICTURE_TYPE_I;
+
if (ff_alloc_picture(s, s->last_picture_ptr, 0) < 0) {
s->last_picture_ptr = NULL;
return -1;
return i;
}
s->next_picture_ptr = &s->picture[i];
+
+ s->next_picture_ptr->reference = 3;
+ s->next_picture_ptr->f.pict_type = AV_PICTURE_TYPE_I;
+
if (ff_alloc_picture(s, s->next_picture_ptr, 0) < 0) {
s->next_picture_ptr = NULL;
return -1;
s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
}
- if (s->dct_error_sum) {
- assert(s->avctx->noise_reduction && s->encoding);
- update_noise_reduction(s);
- }
-
#if FF_API_XVMC
FF_DISABLE_DEPRECATION_WARNINGS
if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
} else
FF_ENABLE_DEPRECATION_WARNINGS
#endif /* FF_API_XVMC */
- if (s->er.error_count &&
- !s->avctx->hwaccel &&
- s->unrestricted_mv &&
- s->current_picture.reference &&
- !s->intra_only &&
- !(s->flags & CODEC_FLAG_EMU_EDGE)) {
- const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
- int hshift = desc->log2_chroma_w;
- int vshift = desc->log2_chroma_h;
- s->dsp.draw_edges(s->current_picture.f.data[0], s->linesize,
- s->h_edge_pos, s->v_edge_pos,
- EDGE_WIDTH, EDGE_WIDTH,
- EDGE_TOP | EDGE_BOTTOM);
- s->dsp.draw_edges(s->current_picture.f.data[1], s->uvlinesize,
- s->h_edge_pos >> hshift, s->v_edge_pos >> vshift,
- EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
- EDGE_TOP | EDGE_BOTTOM);
- s->dsp.draw_edges(s->current_picture.f.data[2], s->uvlinesize,
- s->h_edge_pos >> hshift, s->v_edge_pos >> vshift,
- EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
- EDGE_TOP | EDGE_BOTTOM);
- }
emms_c();
*/
void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
Picture *last, int y, int h, int picture_structure,
- int first_field, int draw_edges, int low_delay,
+ int first_field, int low_delay,
int v_edge_pos, int h_edge_pos)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
- int hshift = desc->log2_chroma_w;
int vshift = desc->log2_chroma_h;
const int field_pic = picture_structure != PICT_FRAME;
if(field_pic){
y <<= 1;
}
- if (!avctx->hwaccel &&
- draw_edges &&
- cur->reference &&
- !(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
- int *linesize = cur->f.linesize;
- int sides = 0, edge_h;
- if (y==0) sides |= EDGE_TOP;
- if (y + h >= v_edge_pos)
- sides |= EDGE_BOTTOM;
-
- edge_h= FFMIN(h, v_edge_pos - y);
-
- dsp->draw_edges(cur->f.data[0] + y * linesize[0],
- linesize[0], h_edge_pos, edge_h,
- EDGE_WIDTH, EDGE_WIDTH, sides);
- dsp->draw_edges(cur->f.data[1] + (y >> vshift) * linesize[1],
- linesize[1], h_edge_pos >> hshift, edge_h >> vshift,
- EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift, sides);
- dsp->draw_edges(cur->f.data[2] + (y >> vshift) * linesize[2],
- linesize[2], h_edge_pos >> hshift, edge_h >> vshift,
- EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift, sides);
- }
-
h = FFMIN(h, avctx->height - y);
if(field_pic && first_field && !(avctx->slice_flags&SLICE_FLAG_ALLOW_FIELD)) return;
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
{
- int draw_edges = s->unrestricted_mv && !s->intra_only;
ff_draw_horiz_band(s->avctx, &s->dsp, &s->current_picture,
&s->last_picture, y, h, s->picture_structure,
- s->first_field, draw_edges, s->low_delay,
+ s->first_field, s->low_delay,
s->v_edge_pos, s->h_edge_pos);
}
s->pp_time=0;
}
-static void dct_unquantize_mpeg1_intra_c(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, nCoeffs;
- const uint16_t *quant_matrix;
-
- nCoeffs= s->block_last_index[n];
-
- if (n < 4)
- block[0] = block[0] * s->y_dc_scale;
- else
- block[0] = block[0] * s->c_dc_scale;
- /* XXX: only mpeg1 */
- quant_matrix = s->intra_matrix;
- for(i=1;i<=nCoeffs;i++) {
- int j= s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- if (level < 0) {
- level = -level;
- level = (int)(level * qscale * quant_matrix[j]) >> 3;
- level = (level - 1) | 1;
- level = -level;
- } else {
- level = (int)(level * qscale * quant_matrix[j]) >> 3;
- level = (level - 1) | 1;
- }
- block[j] = level;
- }
- }
-}
-
-static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, nCoeffs;
- const uint16_t *quant_matrix;
-
- nCoeffs= s->block_last_index[n];
-
- quant_matrix = s->inter_matrix;
- for(i=0; i<=nCoeffs; i++) {
- int j= s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- if (level < 0) {
- level = -level;
- level = (((level << 1) + 1) * qscale *
- ((int) (quant_matrix[j]))) >> 4;
- level = (level - 1) | 1;
- level = -level;
- } else {
- level = (((level << 1) + 1) * qscale *
- ((int) (quant_matrix[j]))) >> 4;
- level = (level - 1) | 1;
- }
- block[j] = level;
- }
- }
-}
-
-static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, nCoeffs;
- const uint16_t *quant_matrix;
-
- if(s->alternate_scan) nCoeffs= 63;
- else nCoeffs= s->block_last_index[n];
-
- if (n < 4)
- block[0] = block[0] * s->y_dc_scale;
- else
- block[0] = block[0] * s->c_dc_scale;
- quant_matrix = s->intra_matrix;
- for(i=1;i<=nCoeffs;i++) {
- int j= s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- if (level < 0) {
- level = -level;
- level = (int)(level * qscale * quant_matrix[j]) >> 3;
- level = -level;
- } else {
- level = (int)(level * qscale * quant_matrix[j]) >> 3;
- }
- block[j] = level;
- }
- }
-}
-
-static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, nCoeffs;
- const uint16_t *quant_matrix;
- int sum=-1;
-
- if(s->alternate_scan) nCoeffs= 63;
- else nCoeffs= s->block_last_index[n];
-
- if (n < 4)
- block[0] = block[0] * s->y_dc_scale;
- else
- block[0] = block[0] * s->c_dc_scale;
- quant_matrix = s->intra_matrix;
- for(i=1;i<=nCoeffs;i++) {
- int j= s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- if (level < 0) {
- level = -level;
- level = (int)(level * qscale * quant_matrix[j]) >> 3;
- level = -level;
- } else {
- level = (int)(level * qscale * quant_matrix[j]) >> 3;
- }
- block[j] = level;
- sum+=level;
- }
- }
- block[63]^=sum&1;
-}
-
-static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, nCoeffs;
- const uint16_t *quant_matrix;
- int sum=-1;
-
- if(s->alternate_scan) nCoeffs= 63;
- else nCoeffs= s->block_last_index[n];
-
- quant_matrix = s->inter_matrix;
- for(i=0; i<=nCoeffs; i++) {
- int j= s->intra_scantable.permutated[i];
- level = block[j];
- if (level) {
- if (level < 0) {
- level = -level;
- level = (((level << 1) + 1) * qscale *
- ((int) (quant_matrix[j]))) >> 4;
- level = -level;
- } else {
- level = (((level << 1) + 1) * qscale *
- ((int) (quant_matrix[j]))) >> 4;
- }
- block[j] = level;
- sum+=level;
- }
- }
- block[63]^=sum&1;
-}
-
-static void dct_unquantize_h263_intra_c(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, qmul, qadd;
- int nCoeffs;
-
- assert(s->block_last_index[n]>=0);
-
- qmul = qscale << 1;
-
- if (!s->h263_aic) {
- if (n < 4)
- block[0] = block[0] * s->y_dc_scale;
- else
- block[0] = block[0] * s->c_dc_scale;
- qadd = (qscale - 1) | 1;
- }else{
- qadd = 0;
- }
- if(s->ac_pred)
- nCoeffs=63;
- else
- nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
-
- for(i=1; i<=nCoeffs; i++) {
- level = block[i];
- if (level) {
- if (level < 0) {
- level = level * qmul - qadd;
- } else {
- level = level * qmul + qadd;
- }
- block[i] = level;
- }
- }
-}
-
-static void dct_unquantize_h263_inter_c(MpegEncContext *s,
- int16_t *block, int n, int qscale)
-{
- int i, level, qmul, qadd;
- int nCoeffs;
-
- assert(s->block_last_index[n]>=0);
-
- qadd = (qscale - 1) | 1;
- qmul = qscale << 1;
-
- nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
-
- for(i=0; i<=nCoeffs; i++) {
- level = block[i];
- if (level) {
- if (level < 0) {
- level = level * qmul - qadd;
- } else {
- level = level * qmul + qadd;
- }
- block[i] = level;
- }
- }
-}
-
/**
* set qscale and update qscale dependent variables.
*/
projects / ffmpeg / blobdiff