mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-10-05 18:01:59 +02:00
quantizer noise shaping
Originally committed as revision 2742 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
parent
95ba2c8f43
commit
77ea0d4bdd
9
ffmpeg.c
9
ffmpeg.c
@ -125,6 +125,7 @@ static int use_umv = 0;
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static int use_alt_scan = 0;
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static int use_trell = 0;
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static int use_scan_offset = 0;
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static int qns = 0;
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static int closed_gop = 0;
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static int do_deinterlace = 0;
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static int do_interlace_dct = 0;
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@ -659,7 +660,6 @@ static void do_video_out(AVFormatContext *s,
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big_picture.quality = ist->st->quality;
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}else
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big_picture.quality = ost->st->quality;
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ret = avcodec_encode_video(enc,
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video_buffer, VIDEO_BUFFER_SIZE,
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&big_picture);
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@ -1987,6 +1987,11 @@ static void opt_noise_reduction(const char *arg)
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noise_reduction= atoi(arg);
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}
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static void opt_qns(const char *arg)
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{
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qns= atoi(arg);
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}
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static void opt_sc_threshold(const char *arg)
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{
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sc_threshold= atoi(arg);
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@ -2400,6 +2405,7 @@ static void opt_output_file(const char *filename)
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video_enc->ildct_cmp = ildct_cmp;
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video_enc->me_sub_cmp = sub_cmp;
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video_enc->me_cmp = cmp;
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video_enc->quantizer_noise_shaping= qns;
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if (use_umv) {
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video_enc->flags |= CODEC_FLAG_H263P_UMV;
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@ -3080,6 +3086,7 @@ const OptionDef options[] = {
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{ "inter_matrix", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_inter_matrix}, "specify inter matrix coeffs", "matrix" },
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{ "top", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_top_field_first}, "top=1/bottom=0/auto=-1 field first", "" },
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{ "nr", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_noise_reduction}, "noise reduction", "" },
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{ "qns", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qns}, "quantization noise shaping", "" },
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{ "sc_threshold", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_sc_threshold}, "scene change threshold", "threshold" },
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/* audio options */
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@ -17,7 +17,7 @@ extern "C" {
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#define FFMPEG_VERSION_INT 0x000408
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#define FFMPEG_VERSION "0.4.8"
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#define LIBAVCODEC_BUILD 4699
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#define LIBAVCODEC_BUILD 4700
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#define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
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#define LIBAVCODEC_VERSION FFMPEG_VERSION
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@ -1504,6 +1504,12 @@ typedef struct AVCodecContext {
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#define FF_AA_FASTINT 1 //not implemented yet
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#define FF_AA_INT 2
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#define FF_AA_FLOAT 3
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/**
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* Quantizer noise shaping.
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* - encoding: set by user
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* - decoding: unused
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*/
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int quantizer_noise_shaping;
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} AVCodecContext;
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@ -26,6 +26,7 @@
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*/
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#include <limits.h>
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#include <math.h> //for PI
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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@ -57,6 +58,7 @@ static void draw_edges_c(uint8_t *buf, int wrap, int width, int height, int w);
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#ifdef CONFIG_ENCODERS
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static int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
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static int dct_quantize_trellis_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
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static int dct_quantize_refine(MpegEncContext *s, DCTELEM *block, int16_t *weight, DCTELEM *orig, int n, int qscale);
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static int sse_mb(MpegEncContext *s);
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static void denoise_dct_c(MpegEncContext *s, DCTELEM *block);
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#endif //CONFIG_ENCODERS
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@ -3264,8 +3266,33 @@ void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
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#ifdef CONFIG_ENCODERS
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static void get_vissual_weight(int16_t *weight, uint8_t *ptr, int stride){
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int x, y;
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//FIXME optimize
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for(y=0; y<8; y++){
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for(x=0; x<8; x++){
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int x2, y2;
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int sum=0;
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int sqr=0;
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int count=0;
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for(y2= FFMAX(y-1, 0); y2 < FFMIN(8, y+2); y2++){
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for(x2= FFMAX(x-1, 0); x2 < FFMIN(8, x+2); x2++){
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int v= ptr[x2 + y2*stride];
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sum += v;
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sqr += v*v;
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count++;
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}
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}
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weight[x + 8*y]= (36*ff_sqrt(count*sqr - sum*sum)) / count;
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}
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}
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}
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static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
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{
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int16_t weight[6][64];
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DCTELEM orig[6][64];
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const int mb_x= s->mb_x;
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const int mb_y= s->mb_y;
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int i;
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@ -3298,16 +3325,19 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
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}
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if (s->mb_intra) {
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uint8_t *ptr;
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int wrap_y;
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uint8_t *ptr_y, *ptr_cb, *ptr_cr;
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int wrap_y, wrap_c;
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int emu=0;
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wrap_y = s->linesize;
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ptr = s->new_picture.data[0] + (mb_y * 16 * wrap_y) + mb_x * 16;
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wrap_c = s->uvlinesize;
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ptr_y = s->new_picture.data[0] + (mb_y * 16 * wrap_y) + mb_x * 16;
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ptr_cb = s->new_picture.data[1] + (mb_y * 8 * wrap_c) + mb_x * 8;
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ptr_cr = s->new_picture.data[2] + (mb_y * 8 * wrap_c) + mb_x * 8;
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if(mb_x*16+16 > s->width || mb_y*16+16 > s->height){
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ff_emulated_edge_mc(s->edge_emu_buffer, ptr, wrap_y, 16, 16, mb_x*16, mb_y*16, s->width, s->height);
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ptr= s->edge_emu_buffer;
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ff_emulated_edge_mc(s->edge_emu_buffer, ptr_y, wrap_y, 16, 16, mb_x*16, mb_y*16, s->width, s->height);
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ptr_y= s->edge_emu_buffer;
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emu=1;
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}
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@ -3315,12 +3345,12 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
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int progressive_score, interlaced_score;
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s->interlaced_dct=0;
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progressive_score= s->dsp.ildct_cmp[4](s, ptr , NULL, wrap_y, 8)
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+s->dsp.ildct_cmp[4](s, ptr + wrap_y*8, NULL, wrap_y, 8) - 400;
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progressive_score= s->dsp.ildct_cmp[4](s, ptr_y , NULL, wrap_y, 8)
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+s->dsp.ildct_cmp[4](s, ptr_y + wrap_y*8, NULL, wrap_y, 8) - 400;
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if(progressive_score > 0){
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interlaced_score = s->dsp.ildct_cmp[4](s, ptr , NULL, wrap_y*2, 8)
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+s->dsp.ildct_cmp[4](s, ptr + wrap_y , NULL, wrap_y*2, 8);
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interlaced_score = s->dsp.ildct_cmp[4](s, ptr_y , NULL, wrap_y*2, 8)
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+s->dsp.ildct_cmp[4](s, ptr_y + wrap_y , NULL, wrap_y*2, 8);
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if(progressive_score > interlaced_score){
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s->interlaced_dct=1;
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@ -3330,29 +3360,36 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
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}
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}
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s->dsp.get_pixels(s->block[0], ptr , wrap_y);
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s->dsp.get_pixels(s->block[1], ptr + 8, wrap_y);
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s->dsp.get_pixels(s->block[2], ptr + dct_offset , wrap_y);
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s->dsp.get_pixels(s->block[3], ptr + dct_offset + 8, wrap_y);
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s->dsp.get_pixels(s->block[0], ptr_y , wrap_y);
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s->dsp.get_pixels(s->block[1], ptr_y + 8, wrap_y);
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s->dsp.get_pixels(s->block[2], ptr_y + dct_offset , wrap_y);
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s->dsp.get_pixels(s->block[3], ptr_y + dct_offset + 8, wrap_y);
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if(s->flags&CODEC_FLAG_GRAY){
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skip_dct[4]= 1;
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skip_dct[5]= 1;
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}else{
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int wrap_c = s->uvlinesize;
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ptr = s->new_picture.data[1] + (mb_y * 8 * wrap_c) + mb_x * 8;
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if(emu){
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ff_emulated_edge_mc(s->edge_emu_buffer, ptr, wrap_c, 8, 8, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
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ptr= s->edge_emu_buffer;
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ff_emulated_edge_mc(s->edge_emu_buffer, ptr_cb, wrap_c, 8, 8, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
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ptr_cb= s->edge_emu_buffer;
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}
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s->dsp.get_pixels(s->block[4], ptr, wrap_c);
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s->dsp.get_pixels(s->block[4], ptr_cb, wrap_c);
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ptr = s->new_picture.data[2] + (mb_y * 8 * wrap_c) + mb_x * 8;
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if(emu){
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ff_emulated_edge_mc(s->edge_emu_buffer, ptr, wrap_c, 8, 8, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
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ptr= s->edge_emu_buffer;
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ff_emulated_edge_mc(s->edge_emu_buffer, ptr_cr, wrap_c, 8, 8, mb_x*8, mb_y*8, s->width>>1, s->height>>1);
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ptr_cr= s->edge_emu_buffer;
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}
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s->dsp.get_pixels(s->block[5], ptr, wrap_c);
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s->dsp.get_pixels(s->block[5], ptr_cr, wrap_c);
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}
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if(s->avctx->quantizer_noise_shaping){
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get_vissual_weight(weight[0], ptr_y , wrap_y);
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get_vissual_weight(weight[1], ptr_y + 8, wrap_y);
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get_vissual_weight(weight[2], ptr_y + dct_offset , wrap_y);
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get_vissual_weight(weight[3], ptr_y + dct_offset + 8, wrap_y);
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get_vissual_weight(weight[4], ptr_cb , wrap_c);
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get_vissual_weight(weight[5], ptr_cr , wrap_c);
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memcpy(orig[0], s->block[0], sizeof(DCTELEM)*64*6);
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}
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}else{
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op_pixels_func (*op_pix)[4];
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@ -3445,23 +3482,17 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
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if(s->dsp.sad[1](NULL, ptr_y +dct_offset+ 8, dest_y +dct_offset+ 8, wrap_y, 8) < 20*s->qscale) skip_dct[3]= 1;
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if(s->dsp.sad[1](NULL, ptr_cb , dest_cb , wrap_c, 8) < 20*s->qscale) skip_dct[4]= 1;
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if(s->dsp.sad[1](NULL, ptr_cr , dest_cr , wrap_c, 8) < 20*s->qscale) skip_dct[5]= 1;
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#if 0
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{
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static int stat[7];
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int num=0;
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for(i=0; i<6; i++)
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if(skip_dct[i]) num++;
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stat[num]++;
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if(s->mb_x==0 && s->mb_y==0){
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for(i=0; i<7; i++){
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printf("%6d %1d\n", stat[i], i);
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}
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}
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}
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#endif
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}
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if(s->avctx->quantizer_noise_shaping){
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if(!skip_dct[0]) get_vissual_weight(weight[0], ptr_y , wrap_y);
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if(!skip_dct[1]) get_vissual_weight(weight[1], ptr_y + 8, wrap_y);
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if(!skip_dct[2]) get_vissual_weight(weight[2], ptr_y + dct_offset , wrap_y);
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if(!skip_dct[3]) get_vissual_weight(weight[3], ptr_y + dct_offset + 8, wrap_y);
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if(!skip_dct[4]) get_vissual_weight(weight[4], ptr_cb , wrap_c);
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if(!skip_dct[5]) get_vissual_weight(weight[5], ptr_cr , wrap_c);
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memcpy(orig[0], s->block[0], sizeof(DCTELEM)*64*6);
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}
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}
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/* DCT & quantize */
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@ -3483,6 +3514,13 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
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}else
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s->block_last_index[i]= -1;
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}
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if(s->avctx->quantizer_noise_shaping){
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for(i=0;i<6;i++) {
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if(!skip_dct[i]){
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s->block_last_index[i] = dct_quantize_refine(s, s->block[i], weight[i], orig[i], i, s->qscale);
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}
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}
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}
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if(s->luma_elim_threshold && !s->mb_intra)
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for(i=0; i<4; i++)
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@ -4911,6 +4949,401 @@ static int dct_quantize_trellis_c(MpegEncContext *s,
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return last_non_zero;
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}
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#define BASIS_SHIFT 16
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#define RECON_SHIFT 6
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//#define REFINE_STATS 1
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static int16_t basis[64][64];
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static void build_basis(uint8_t *perm){
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int i, j, x, y;
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emms_c();
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for(i=0; i<8; i++){
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for(j=0; j<8; j++){
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for(y=0; y<8; y++){
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for(x=0; x<8; x++){
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double s= 0.25*(1<<BASIS_SHIFT);
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int index= 8*i + j;
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int perm_index= perm[index];
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if(i==0) s*= sqrt(0.5);
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if(j==0) s*= sqrt(0.5);
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basis[perm_index][8*x + y]= lrintf(s * cos((M_PI/8.0)*i*(x+0.5)) * cos((M_PI/8.0)*j*(y+0.5)));
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}
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}
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}
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}
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}
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static int try_basis(int16_t rem[64], int16_t weight[64], int index, int scale){
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int i;
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unsigned int sum=0;
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for(i=0; i<8*8; i++){
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int b= rem[i] - ((basis[index][i]*scale + (1<<(BASIS_SHIFT - RECON_SHIFT-1)))>>(BASIS_SHIFT - RECON_SHIFT));
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int w= weight[i];
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b= (b + (1<<(RECON_SHIFT-1))) >> RECON_SHIFT;
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assert(-512<b && b<512);
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sum += (w*b)*(w*b)>>4;
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}
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return sum>>2;
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}
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static void add_basis(int16_t rem[64], int index, int scale){
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int i;
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for(i=0; i<8*8; i++){
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rem[i] -= (basis[index][i]*scale + (1<<(BASIS_SHIFT - RECON_SHIFT-1)))>>(BASIS_SHIFT - RECON_SHIFT);
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}
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}
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static int dct_quantize_refine(MpegEncContext *s, //FIXME breaks denoise?
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DCTELEM *block, int16_t *weight, DCTELEM *orig,
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int n, int qscale){
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int16_t rem[64];
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const int *qmat;
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const uint8_t *scantable= s->intra_scantable.scantable;
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const uint8_t *perm_scantable= s->intra_scantable.permutated;
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// unsigned int threshold1, threshold2;
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// int bias=0;
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int run_tab[65];
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int prev_run=0;
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int prev_level=0;
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int qmul, qadd, start_i, last_non_zero, i, dc;
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const int esc_length= s->ac_esc_length;
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uint8_t * length;
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uint8_t * last_length;
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int lambda;
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int rle_index, run, q, sum;
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#ifdef REFINE_STATS
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static int count=0;
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static int after_last=0;
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static int to_zero=0;
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static int from_zero=0;
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static int raise=0;
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static int lower=0;
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static int messed_sign=0;
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#endif
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if(basis[0][0] == 0)
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build_basis(s->dsp.idct_permutation);
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qmul= qscale*2;
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qadd= (qscale-1)|1;
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if (s->mb_intra) {
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if (!s->h263_aic) {
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if (n < 4)
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q = s->y_dc_scale;
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else
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q = s->c_dc_scale;
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} else{
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/* For AIC we skip quant/dequant of INTRADC */
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q = 1;
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qadd=0;
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}
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q <<= RECON_SHIFT-3;
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/* note: block[0] is assumed to be positive */
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dc= block[0]*q;
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// block[0] = (block[0] + (q >> 1)) / q;
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start_i = 1;
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qmat = s->q_intra_matrix[qscale];
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// if(s->mpeg_quant || s->out_format == FMT_MPEG1)
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// bias= 1<<(QMAT_SHIFT-1);
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length = s->intra_ac_vlc_length;
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last_length= s->intra_ac_vlc_last_length;
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} else {
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dc= 0;
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start_i = 0;
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qmat = s->q_inter_matrix[qscale];
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length = s->inter_ac_vlc_length;
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last_length= s->inter_ac_vlc_last_length;
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}
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last_non_zero = s->block_last_index[n];
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#ifdef REFINE_STATS
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{START_TIMER
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#endif
|
||||
for(i=0; i<64; i++){ //FIXME memsetw or similar
|
||||
rem[i]= (orig[i]<<RECON_SHIFT) - dc; //FIXME use orig dirrectly insteadof copying to rem[]
|
||||
}
|
||||
#ifdef REFINE_STATS
|
||||
STOP_TIMER("memset rem[]")}
|
||||
#endif
|
||||
sum=0;
|
||||
for(i=0; i<64; i++){
|
||||
int one= 36;
|
||||
int qns=4;
|
||||
int w;
|
||||
|
||||
w= ABS(weight[i]) + qns*one;
|
||||
w= 15 + (48*qns*one + w/2)/w; // 16 .. 63
|
||||
|
||||
weight[i] = w;
|
||||
// w=weight[i] = (63*qns + (w/2)) / w;
|
||||
|
||||
assert(w>0);
|
||||
assert(w<(1<<6));
|
||||
sum += w*w;
|
||||
}
|
||||
lambda= sum*(uint64_t)s->lambda2 >> (FF_LAMBDA_SHIFT - 6 + 6 + 6 + 6);
|
||||
#ifdef REFINE_STATS
|
||||
{START_TIMER
|
||||
#endif
|
||||
run=0;
|
||||
rle_index=0;
|
||||
for(i=start_i; i<=last_non_zero; i++){
|
||||
int j= perm_scantable[i];
|
||||
const int level= block[j];
|
||||
int coeff;
|
||||
|
||||
if(level){
|
||||
if(level<0) coeff= qmul*level - qadd;
|
||||
else coeff= qmul*level + qadd;
|
||||
run_tab[rle_index++]=run;
|
||||
run=0;
|
||||
|
||||
add_basis(rem, j, coeff);
|
||||
}else{
|
||||
run++;
|
||||
}
|
||||
}
|
||||
#ifdef REFINE_STATS
|
||||
if(last_non_zero>0){
|
||||
STOP_TIMER("init rem[]")
|
||||
}
|
||||
}
|
||||
|
||||
{START_TIMER
|
||||
#endif
|
||||
for(;;){
|
||||
int best_score=try_basis(rem, weight, 0, 0);
|
||||
int nochange_score= best_score;
|
||||
int best_coeff=0;
|
||||
int best_change=0;
|
||||
int run2, best_unquant_change;
|
||||
#ifdef REFINE_STATS
|
||||
{START_TIMER
|
||||
#endif
|
||||
if(start_i){
|
||||
const int level= block[0];
|
||||
int change, old_coeff;
|
||||
|
||||
assert(s->mb_intra);
|
||||
|
||||
old_coeff= q*level;
|
||||
|
||||
for(change=-1; change<=1; change+=2){
|
||||
int new_level= level + change;
|
||||
int score, new_coeff;
|
||||
|
||||
new_coeff= q*new_level;
|
||||
if(new_coeff >= 2048 || new_coeff < 0)
|
||||
continue;
|
||||
|
||||
score= try_basis(rem, weight, 0, new_coeff - old_coeff);
|
||||
if(score<best_score){
|
||||
best_score= score;
|
||||
best_coeff= 0;
|
||||
best_change= change;
|
||||
best_unquant_change= new_coeff - old_coeff;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
run=0;
|
||||
rle_index=0;
|
||||
run2= run_tab[rle_index++];
|
||||
prev_level=0;
|
||||
prev_run=0;
|
||||
|
||||
for(i=start_i; i<64; i++){
|
||||
int j= perm_scantable[i];
|
||||
const int level= block[j];
|
||||
int change, old_coeff;
|
||||
|
||||
if(s->avctx->quantizer_noise_shaping < 3 && i > last_non_zero + 1)
|
||||
break;
|
||||
|
||||
if(level){
|
||||
if(level<0) old_coeff= qmul*level - qadd;
|
||||
else old_coeff= qmul*level + qadd;
|
||||
run2= run_tab[rle_index++]; //FIXME ! maybe after last
|
||||
}else{
|
||||
old_coeff=0;
|
||||
run2--;
|
||||
assert(run2>=0 || i >= last_non_zero );
|
||||
}
|
||||
|
||||
for(change=-1; change<=1; change+=2){
|
||||
int new_level= level + change;
|
||||
int score, new_coeff, unquant_change;
|
||||
|
||||
score=0;
|
||||
if(s->avctx->quantizer_noise_shaping < 2 && ABS(new_level) > ABS(level))
|
||||
continue;
|
||||
|
||||
if(new_level){
|
||||
if(new_level<0) new_coeff= qmul*new_level - qadd;
|
||||
else new_coeff= qmul*new_level + qadd;
|
||||
if(new_coeff >= 2048 || new_coeff <= -2048)
|
||||
continue;
|
||||
//FIXME check for overflow
|
||||
|
||||
if(level){
|
||||
if(level < 63 && level > -63){
|
||||
if(i < last_non_zero)
|
||||
score += length[UNI_AC_ENC_INDEX(run, new_level+64)]
|
||||
- length[UNI_AC_ENC_INDEX(run, level+64)];
|
||||
else
|
||||
score += last_length[UNI_AC_ENC_INDEX(run, new_level+64)]
|
||||
- last_length[UNI_AC_ENC_INDEX(run, level+64)];
|
||||
}
|
||||
}else{
|
||||
assert(ABS(new_level)==1);
|
||||
if(i < last_non_zero){
|
||||
int next_i= i + run2 + 1;
|
||||
int next_level= block[ perm_scantable[next_i] ] + 64;
|
||||
|
||||
if(next_level&(~127))
|
||||
next_level= 0;
|
||||
|
||||
if(next_i < last_non_zero)
|
||||
score += length[UNI_AC_ENC_INDEX(run, 65)]
|
||||
+ length[UNI_AC_ENC_INDEX(run2, next_level)]
|
||||
- length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)];
|
||||
else
|
||||
score += length[UNI_AC_ENC_INDEX(run, 65)]
|
||||
+ last_length[UNI_AC_ENC_INDEX(run2, next_level)]
|
||||
- last_length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)];
|
||||
}else{
|
||||
score += last_length[UNI_AC_ENC_INDEX(run, 65)];
|
||||
if(prev_level){
|
||||
score += length[UNI_AC_ENC_INDEX(prev_run, prev_level)]
|
||||
- last_length[UNI_AC_ENC_INDEX(prev_run, prev_level)];
|
||||
}
|
||||
}
|
||||
}
|
||||
}else{
|
||||
new_coeff=0;
|
||||
assert(ABS(level)==1);
|
||||
|
||||
if(i < last_non_zero){
|
||||
int next_i= i + run2 + 1;
|
||||
int next_level= block[ perm_scantable[next_i] ] + 64;
|
||||
|
||||
if(next_level&(~127))
|
||||
next_level= 0;
|
||||
|
||||
if(next_i < last_non_zero)
|
||||
score += length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)]
|
||||
- length[UNI_AC_ENC_INDEX(run2, next_level)]
|
||||
- length[UNI_AC_ENC_INDEX(run, 65)];
|
||||
else
|
||||
score += last_length[UNI_AC_ENC_INDEX(run + run2 + 1, next_level)]
|
||||
- last_length[UNI_AC_ENC_INDEX(run2, next_level)]
|
||||
- length[UNI_AC_ENC_INDEX(run, 65)];
|
||||
}else{
|
||||
score += -last_length[UNI_AC_ENC_INDEX(run, 65)];
|
||||
if(prev_level){
|
||||
score += last_length[UNI_AC_ENC_INDEX(prev_run, prev_level)]
|
||||
- length[UNI_AC_ENC_INDEX(prev_run, prev_level)];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
score *= lambda;
|
||||
|
||||
unquant_change= new_coeff - old_coeff;
|
||||
assert((score < 100*lambda && score > -100*lambda) || lambda==0);
|
||||
|
||||
score+= try_basis(rem, weight, j, unquant_change);
|
||||
if(score<best_score){
|
||||
best_score= score;
|
||||
best_coeff= i;
|
||||
best_change= change;
|
||||
best_unquant_change= unquant_change;
|
||||
}
|
||||
}
|
||||
if(level){
|
||||
prev_level= level + 64;
|
||||
if(prev_level&(~127))
|
||||
prev_level= 0;
|
||||
prev_run= run;
|
||||
run=0;
|
||||
}else{
|
||||
run++;
|
||||
}
|
||||
}
|
||||
#ifdef REFINE_STATS
|
||||
STOP_TIMER("iterative step")}
|
||||
#endif
|
||||
|
||||
if(best_change){
|
||||
int j= perm_scantable[ best_coeff ];
|
||||
|
||||
block[j] += best_change;
|
||||
|
||||
if(best_coeff > last_non_zero){
|
||||
last_non_zero= best_coeff;
|
||||
assert(block[j]);
|
||||
#ifdef REFINE_STATS
|
||||
after_last++;
|
||||
#endif
|
||||
}else{
|
||||
#ifdef REFINE_STATS
|
||||
if(block[j]){
|
||||
if(block[j] - best_change){
|
||||
if(ABS(block[j]) > ABS(block[j] - best_change)){
|
||||
raise++;
|
||||
}else{
|
||||
lower++;
|
||||
}
|
||||
}else{
|
||||
from_zero++;
|
||||
}
|
||||
}else{
|
||||
to_zero++;
|
||||
}
|
||||
#endif
|
||||
for(; last_non_zero>=start_i; last_non_zero--){
|
||||
if(block[perm_scantable[last_non_zero]])
|
||||
break;
|
||||
}
|
||||
}
|
||||
#ifdef REFINE_STATS
|
||||
count++;
|
||||
if(256*256*256*64 % count == 0){
|
||||
printf("after_last:%d to_zero:%d from_zero:%d raise:%d lower:%d sign:%d xyp:%d/%d/%d\n", after_last, to_zero, from_zero, raise, lower, messed_sign, s->mb_x, s->mb_y, s->picture_number);
|
||||
}
|
||||
#endif
|
||||
run=0;
|
||||
rle_index=0;
|
||||
for(i=start_i; i<=last_non_zero; i++){
|
||||
int j= perm_scantable[i];
|
||||
const int level= block[j];
|
||||
|
||||
if(level){
|
||||
run_tab[rle_index++]=run;
|
||||
run=0;
|
||||
}else{
|
||||
run++;
|
||||
}
|
||||
}
|
||||
|
||||
add_basis(rem, j, best_unquant_change);
|
||||
}else{
|
||||
break;
|
||||
}
|
||||
}
|
||||
#ifdef REFINE_STATS
|
||||
if(last_non_zero>0){
|
||||
STOP_TIMER("iterative search")
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
return last_non_zero;
|
||||
}
|
||||
|
||||
static int dct_quantize_c(MpegEncContext *s,
|
||||
DCTELEM *block, int n,
|
||||
int qscale, int *overflow)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user