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Diffstat (limited to 'src/libffmpeg/libavcodec/h263.c')
-rw-r--r--src/libffmpeg/libavcodec/h263.c122
1 files changed, 61 insertions, 61 deletions
diff --git a/src/libffmpeg/libavcodec/h263.c b/src/libffmpeg/libavcodec/h263.c
index ec776eb98..59d746272 100644
--- a/src/libffmpeg/libavcodec/h263.c
+++ b/src/libffmpeg/libavcodec/h263.c
@@ -76,7 +76,7 @@ static void mpeg4_encode_visual_object_header(MpegEncContext * s);
static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number);
#endif //CONFIG_ENCODERS
static void mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb);
-static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr, int *dir_ptr);
+static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding);
#ifdef CONFIG_ENCODERS
static uint8_t uni_DCtab_lum_len[512];
@@ -496,6 +496,17 @@ void ff_clean_h263_qscales(MpegEncContext *s){
if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2)
qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2;
}
+
+ if(s->codec_id != CODEC_ID_H263P){
+ for(i=1; i<s->mb_num; i++){
+ int mb_xy= s->mb_index2xy[i];
+
+ if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){
+ s->mb_type[mb_xy]&= ~CANDIDATE_MB_TYPE_INTER4V;
+ s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER;
+ }
+ }
+ }
}
/**
@@ -507,15 +518,6 @@ void ff_clean_mpeg4_qscales(MpegEncContext *s){
ff_clean_h263_qscales(s);
- for(i=1; i<s->mb_num; i++){
- int mb_xy= s->mb_index2xy[i];
-
- if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){
- s->mb_type[mb_xy]&= ~CANDIDATE_MB_TYPE_INTER4V;
- s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER;
- }
- }
-
if(s->pict_type== B_TYPE){
int odd=0;
/* ok, come on, this isnt funny anymore, theres more code for handling this mpeg4 mess than
@@ -1071,15 +1073,7 @@ void mpeg4_encode_mb(MpegEncContext * s,
int i;
for(i=0; i<6; i++){
- const int level= block[i][0];
- uint16_t *dc_ptr;
-
- dc_diff[i]= level - ff_mpeg4_pred_dc(s, i, &dc_ptr, &dir[i]);
- if (i < 4) {
- *dc_ptr = level * s->y_dc_scale;
- } else {
- *dc_ptr = level * s->c_dc_scale;
- }
+ dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
}
if(s->flags & CODEC_FLAG_AC_PRED){
@@ -2380,14 +2374,14 @@ void ff_set_qscale(MpegEncContext * s, int qscale)
/**
* predicts the dc.
+ * encoding quantized level -> quantized diff
+ * decoding quantized diff -> quantized level
* @param n block index (0-3 are luma, 4-5 are chroma)
- * @param dc_val_ptr a pointer to the dc_val entry for the current MB will be stored here
* @param dir_ptr pointer to an integer where the prediction direction will be stored
- * @return the quantized predicted dc
*/
-static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr, int *dir_ptr)
+static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding)
{
- int a, b, c, wrap, pred, scale;
+ int a, b, c, wrap, pred, scale, ret;
uint16_t *dc_val;
/* find prediction */
@@ -2429,10 +2423,32 @@ static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_
/* we assume pred is positive */
pred = FASTDIV((pred + (scale >> 1)), scale);
- /* prepare address for prediction update */
- *dc_val_ptr = &dc_val[0];
+ if(encoding){
+ ret = level - pred;
+ }else{
+ level += pred;
+ ret= level;
+ if(s->error_resilience>=3){
+ if(level<0){
+ av_log(s->avctx, AV_LOG_ERROR, "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+ if(level*scale > 2048 + scale){
+ av_log(s->avctx, AV_LOG_ERROR, "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+ }
+ }
+ level *=scale;
+ if(level&(~2047)){
+ if(level<0)
+ level=0;
+ else if(!(s->workaround_bugs&FF_BUG_DC_CLIP))
+ level=2047;
+ }
+ dc_val[0]= level;
- return pred;
+ return ret;
}
/**
@@ -3219,6 +3235,9 @@ static inline int get_amv(MpegEncContext *s, int n){
int x, y, mb_v, sum, dx, dy, shift;
int len = 1 << (s->f_code + 4);
const int a= s->sprite_warping_accuracy;
+
+ if(s->workaround_bugs & FF_BUG_AMV)
+ len >>= s->quarter_sample;
if(s->real_sprite_warping_points==1){
if(s->divx_version==500 && s->divx_build==413)
@@ -4433,6 +4452,8 @@ static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
}
} else {
level = get_bits(&s->gb, 8);
+ if (level == 255)
+ level = 128;
}
}else{
level = get_bits(&s->gb, 8);
@@ -4530,8 +4551,7 @@ not_coded:
*/
static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
{
- int level, pred, code;
- uint16_t *dc_val;
+ int level, code;
if (n < 4)
code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
@@ -4566,30 +4586,8 @@ static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
}
}
}
- pred = ff_mpeg4_pred_dc(s, n, &dc_val, dir_ptr);
- level += pred;
- if (level < 0){
- if(s->error_resilience>=3){
- av_log(s->avctx, AV_LOG_ERROR, "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
- return -1;
- }
- level = 0;
- }
- if (n < 4) {
- *dc_val = level * s->y_dc_scale;
- } else {
- *dc_val = level * s->c_dc_scale;
- }
- if(IS_3IV1)
- *dc_val = level * 8;
-
- if(s->error_resilience>=3){
- if(*dc_val > 2048 + s->y_dc_scale + s->c_dc_scale){
- av_log(s->avctx, AV_LOG_ERROR, "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }
- return level;
+
+ return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0);
}
/**
@@ -4720,6 +4718,8 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
if (cache&0x80000000) {
if (cache&0x40000000) {
+ int ulevel;
+
/* third escape */
SKIP_CACHE(re, &s->gb, 2);
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
@@ -4745,10 +4745,16 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
SKIP_COUNTER(re, &s->gb, 1+12+1);
}
- if(level*s->qscale>1024 || level*s->qscale<-1024){
+ if(s->mpeg_quant){
+ if(intra) ulevel= level*s->qscale*s->intra_matrix[scan_table[1]];
+ else ulevel= level*s->qscale*s->inter_matrix[scan_table[0]];
+ }else
+ ulevel= level*s->qscale*16;
+ if(ulevel>1030*16 || ulevel<-1030*16){
av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc, qp=%d\n", s->qscale);
return -1;
}
+
#if 0
if(s->error_resilience >= FF_ER_COMPLIANT){
const int abs_level= ABS(level);
@@ -4827,14 +4833,8 @@ static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
not_coded:
if (intra) {
if(s->qscale >= s->intra_dc_threshold){
- uint16_t *dc_val;
- block[0] += ff_mpeg4_pred_dc(s, n, &dc_val, &dc_pred_dir);
- if (n < 4) {
- *dc_val = block[0] * s->y_dc_scale;
- } else {
- *dc_val = block[0] * s->c_dc_scale;
- }
-
+ block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0);
+
if(i == -1) i=0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-27 22:04:57 +0000