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FFmpeg/libavcodec/snowenc.c
Niklas Haas 703288cec6 avcodec/internal: add FFCodec.color_ranges 
I went through all codecs and put them into five basic categories:

1. JPEG range only
2. MPEG range only
3. Explicitly tagged
4. Broken (codec supports both but encoder ignores tags)
5. N/A (headerless or pseudo-formats)

Filters in category 5 remain untouched. The rest gain an explicit
assignment of their supported color ranges, with codecs in category
4 being set to MPEG-only for safety.

It might be considered redundant to distinguish between 0 (category 5)
and MPEG+JPEG (category 3), but in doing so we effectively communicate
that we can guarantee that these tags will be encoded, which is distinct
from the situation where there are some codecs that simply don't have
tagging or implied semantics (e.g. rawvideo).

A full list of codecs follows:

JPEG range only:
 - amv
 - roqvideo

MPEG range only:
 - asv1, asv2
 - avui
 - cfhd
 - cljr
 - dnxhd
 - dvvideo
 - ffv1
 - flv
 - h261, h263, h263p
 - {h263,vp8}_v4l2m2m
 - huffyuv, ffvhuff
 - jpeg2000
 - libopenjpeg
 - libtheora
 - libwebp, libwebp_anim
 - libx262
 - libxavs, libxavs2
 - libxvid
 - mpeg1video, mpeg2video
 - mpeg2_qsv
 - mpeg2_vaapi
 - mpeg4, msmpeg4, msmpeg4v2, wmv1, wmv2
 - mpeg4_omx
 - prores, prores_aw, prores_ks
 - rv10, rv20
 - snow
 - speedhq
 - svq1
 - tiff
 - utvideo

Explicitly tagged (MPEG/JPEG):
 - {av1,h264,hevc}_nvenc
 - {av1,h264,hevc}_vaapi
 - {av1,h264,hevc,vp8,vp9,mpeg4}_mediacodec
 - {av1,h264,hevc,vp9}_qsv
 - h264_amf
 - {h264,hevc,prores}_videotoolbox
 - libaom-av1
 - libkvazaar
 - libopenh264
 - librav1e
 - libsvtav1
 - libvpx, libvpx-vp9
 - libx264
 - libx265
 - ljpeg
 - mjpeg
 - vc2

Broken (encoder ignores tags):
 - {av1,hevc}_amf
 - {h264,hevc,mpeg4}_v4l2m2m
 - h264_omx
 - libxeve
 - magicyuv
 - {vp8,vp9,mjpeg}_vaapi

N/A:
 - ayuv, yuv4, y41p, v308, v210, v410, v408 (headerless)
 - pgmyuv (headerless)
 - rawvideo, bitpacked (headerless)
 - vnull, wrapped_avframe (pseudocodecs)
2024-09-08 13:58:11 +02:00

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/*
* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/emms.h"
#include "libavutil/intmath.h"
#include "libavutil/libm.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "internal.h" //For AVCodecInternal.recon_frame
#include "me_cmp.h"
#include "packet_internal.h"
#include "qpeldsp.h"
#include "snow_dwt.h"
#include "snow.h"
#include "rangecoder.h"
#include "mathops.h"
#include "mpegvideo.h"
#include "h263enc.h"
#define FF_ME_ITER 3
typedef struct SnowEncContext {
SnowContext com;
QpelDSPContext qdsp;
MpegvideoEncDSPContext mpvencdsp;
int lambda;
int lambda2;
int pass1_rc;
int pred;
int memc_only;
int no_bitstream;
int intra_penalty;
int motion_est;
int iterative_dia_size;
int scenechange_threshold;
MECmpContext mecc;
MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to eventually make the motion estimation independent of MpegEncContext, so this will be removed then (FIXME/XXX)
MPVPicture cur_pic, last_pic;
#define ME_CACHE_SIZE 1024
unsigned me_cache[ME_CACHE_SIZE];
unsigned me_cache_generation;
uint64_t encoding_error[SNOW_MAX_PLANES];
} SnowEncContext;
static void init_ref(MotionEstContext *c, const uint8_t *const src[3],
uint8_t *const ref[3], uint8_t *const ref2[3],
int x, int y, int ref_index)
{
SnowContext *s = c->avctx->priv_data;
const int offset[3] = {
y*c-> stride + x,
((y*c->uvstride + x) >> s->chroma_h_shift),
((y*c->uvstride + x) >> s->chroma_h_shift),
};
for (int i = 0; i < 3; i++) {
c->src[0][i] = src [i];
c->ref[0][i] = ref [i] + offset[i];
}
av_assert2(!ref_index);
}
static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed)
{
if (v) {
const int a = FFABS(v);
const int e = av_log2(a);
const int el = FFMIN(e, 10);
int i;
put_rac(c, state + 0, 0);
for (i = 0; i < el; i++)
put_rac(c, state + 1 + i, 1); //1..10
for(; i < e; i++)
put_rac(c, state + 1 + 9, 1); //1..10
put_rac(c, state + 1 + FFMIN(i, 9), 0);
for (i = e - 1; i >= el; i--)
put_rac(c, state + 22 + 9, (a >> i) & 1); //22..31
for(; i >= 0; i--)
put_rac(c, state + 22 + i, (a >> i) & 1); //22..31
if (is_signed)
put_rac(c, state + 11 + el, v < 0); //11..21
} else {
put_rac(c, state + 0, 1);
}
}
static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2)
{
int r = log2 >= 0 ? 1<<log2 : 1;
av_assert2(v >= 0);
av_assert2(log2 >= -4);
while (v >= r) {
put_rac(c, state + 4 + log2, 1);
v -= r;
log2++;
if (log2 > 0) r += r;
}
put_rac(c, state + 4 + log2, 0);
for (int i = log2 - 1; i >= 0; i--)
put_rac(c, state + 31 - i, (v >> i) & 1);
}
static int get_encode_buffer(SnowContext *s, AVFrame *frame)
{
int ret;
frame->width = s->avctx->width + 2 * EDGE_WIDTH;
frame->height = s->avctx->height + 2 * EDGE_WIDTH;
ret = ff_encode_alloc_frame(s->avctx, frame);
if (ret < 0)
return ret;
for (int i = 0; frame->data[i]; i++) {
int offset = (EDGE_WIDTH >> (i ? s->chroma_v_shift : 0)) *
frame->linesize[i] +
(EDGE_WIDTH >> (i ? s->chroma_h_shift : 0));
frame->data[i] += offset;
}
frame->width = s->avctx->width;
frame->height = s->avctx->height;
return 0;
}
static av_cold int encode_init(AVCodecContext *avctx)
{
SnowEncContext *const enc = avctx->priv_data;
SnowContext *const s = &enc->com;
MpegEncContext *const mpv = &enc->m;
int plane_index, ret;
int i;
if (enc->pred == DWT_97
&& (avctx->flags & AV_CODEC_FLAG_QSCALE)
&& avctx->global_quality == 0){
av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
return AVERROR(EINVAL);
}
s->spatial_decomposition_type = enc->pred; //FIXME add decorrelator type r transform_type
s->mv_scale = (avctx->flags & AV_CODEC_FLAG_QPEL) ? 2 : 4;
s->block_max_depth= (avctx->flags & AV_CODEC_FLAG_4MV ) ? 1 : 0;
for(plane_index=0; plane_index<3; plane_index++){
s->plane[plane_index].diag_mc= 1;
s->plane[plane_index].htaps= 6;
s->plane[plane_index].hcoeff[0]= 40;
s->plane[plane_index].hcoeff[1]= -10;
s->plane[plane_index].hcoeff[2]= 2;
s->plane[plane_index].fast_mc= 1;
}
// Must be before ff_snow_common_init()
ff_hpeldsp_init(&s->hdsp, avctx->flags);
if ((ret = ff_snow_common_init(avctx)) < 0) {
return ret;
}
#define mcf(dx,dy)\
enc->qdsp.put_qpel_pixels_tab [0][dy+dx/4]=\
enc->qdsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\
s->h264qpel.put_h264_qpel_pixels_tab[0][dy+dx/4];\
enc->qdsp.put_qpel_pixels_tab [1][dy+dx/4]=\
enc->qdsp.put_no_rnd_qpel_pixels_tab[1][dy+dx/4]=\
s->h264qpel.put_h264_qpel_pixels_tab[1][dy+dx/4];
mcf( 0, 0)
mcf( 4, 0)
mcf( 8, 0)
mcf(12, 0)
mcf( 0, 4)
mcf( 4, 4)
mcf( 8, 4)
mcf(12, 4)
mcf( 0, 8)
mcf( 4, 8)
mcf( 8, 8)
mcf(12, 8)
mcf( 0,12)
mcf( 4,12)
mcf( 8,12)
mcf(12,12)
ff_me_cmp_init(&enc->mecc, avctx);
ret = ff_me_init(&enc->m.me, avctx, &enc->mecc, 0);
if (ret < 0)
return ret;
ff_mpegvideoencdsp_init(&enc->mpvencdsp, avctx);
ff_snow_alloc_blocks(s);
s->version=0;
mpv->avctx = avctx;
mpv->bit_rate= avctx->bit_rate;
mpv->lmin = avctx->mb_lmin;
mpv->lmax = avctx->mb_lmax;
mpv->mb_num = (avctx->width * avctx->height + 255) / 256; // For ratecontrol
mpv->me.temp =
mpv->me.scratchpad = av_calloc(avctx->width + 64, 2*16*2*sizeof(uint8_t));
mpv->sc.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
mpv->me.map = av_mallocz(2 * ME_MAP_SIZE * sizeof(*mpv->me.map));
if (!mpv->me.scratchpad || !mpv->me.map || !mpv->sc.obmc_scratchpad)
return AVERROR(ENOMEM);
mpv->me.score_map = mpv->me.map + ME_MAP_SIZE;
ff_h263_encode_init(mpv); //mv_penalty
s->max_ref_frames = av_clip(avctx->refs, 1, MAX_REF_FRAMES);
if(avctx->flags&AV_CODEC_FLAG_PASS1){
if(!avctx->stats_out)
avctx->stats_out = av_mallocz(256);
if (!avctx->stats_out)
return AVERROR(ENOMEM);
}
if((avctx->flags&AV_CODEC_FLAG_PASS2) || !(avctx->flags&AV_CODEC_FLAG_QSCALE)){
ret = ff_rate_control_init(mpv);
if(ret < 0)
return ret;
}
enc->pass1_rc = !(avctx->flags & (AV_CODEC_FLAG_QSCALE|AV_CODEC_FLAG_PASS2));
switch(avctx->pix_fmt){
case AV_PIX_FMT_YUV444P:
// case AV_PIX_FMT_YUV422P:
case AV_PIX_FMT_YUV420P:
// case AV_PIX_FMT_YUV411P:
case AV_PIX_FMT_YUV410P:
s->nb_planes = 3;
s->colorspace_type= 0;
break;
case AV_PIX_FMT_GRAY8:
s->nb_planes = 1;
s->colorspace_type = 1;
break;
/* case AV_PIX_FMT_RGB32:
s->colorspace= 1;
break;*/
}
ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift,
&s->chroma_v_shift);
if (ret)
return ret;
s->input_picture = av_frame_alloc();
if (!s->input_picture)
return AVERROR(ENOMEM);
if ((ret = get_encode_buffer(s, s->input_picture)) < 0)
return ret;
if (enc->motion_est == FF_ME_ITER) {
int size= s->b_width * s->b_height << 2*s->block_max_depth;
for(i=0; i<s->max_ref_frames; i++){
s->ref_mvs[i] = av_calloc(size, sizeof(*s->ref_mvs[i]));
s->ref_scores[i] = av_calloc(size, sizeof(*s->ref_scores[i]));
if (!s->ref_mvs[i] || !s->ref_scores[i])
return AVERROR(ENOMEM);
}
}
return 0;
}
//near copy & paste from dsputil, FIXME
static int pix_sum(const uint8_t * pix, int line_size, int w, int h)
{
int s, i, j;
s = 0;
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++) {
s += pix[0];
pix ++;
}
pix += line_size - w;
}
return s;
}
//near copy & paste from dsputil, FIXME
static int pix_norm1(const uint8_t * pix, int line_size, int w)
{
int s, i, j;
const uint32_t *sq = ff_square_tab + 256;
s = 0;
for (i = 0; i < w; i++) {
for (j = 0; j < w; j ++) {
s += sq[pix[0]];
pix ++;
}
pix += line_size - w;
}
return s;
}
static inline int get_penalty_factor(int lambda, int lambda2, int type){
switch(type&0xFF){
default:
case FF_CMP_SAD:
return lambda>>FF_LAMBDA_SHIFT;
case FF_CMP_DCT:
return (3*lambda)>>(FF_LAMBDA_SHIFT+1);
case FF_CMP_W53:
return (4*lambda)>>(FF_LAMBDA_SHIFT);
case FF_CMP_W97:
return (2*lambda)>>(FF_LAMBDA_SHIFT);
case FF_CMP_SATD:
case FF_CMP_DCT264:
return (2*lambda)>>FF_LAMBDA_SHIFT;
case FF_CMP_RD:
case FF_CMP_PSNR:
case FF_CMP_SSE:
case FF_CMP_NSSE:
return lambda2>>FF_LAMBDA_SHIFT;
case FF_CMP_BIT:
return 1;
}
}
//FIXME copy&paste
#define P_LEFT P[1]
#define P_TOP P[2]
#define P_TOPRIGHT P[3]
#define P_MEDIAN P[4]
#define P_MV1 P[9]
#define FLAG_QPEL 1 //must be 1
static int encode_q_branch(SnowEncContext *enc, int level, int x, int y)
{
SnowContext *const s = &enc->com;
MotionEstContext *const c = &enc->m.me;
uint8_t p_buffer[1024];
uint8_t i_buffer[1024];
uint8_t p_state[sizeof(s->block_state)];
uint8_t i_state[sizeof(s->block_state)];
RangeCoder pc, ic;
uint8_t *pbbak= s->c.bytestream;
uint8_t *pbbak_start= s->c.bytestream_start;
int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
const int w= s->b_width << s->block_max_depth;
const int h= s->b_height << s->block_max_depth;
const int rem_depth= s->block_max_depth - level;
const int index= (x + y*w) << rem_depth;
const int block_w= 1<<(LOG2_MB_SIZE - level);
int trx= (x+1)<<rem_depth;
int try= (y+1)<<rem_depth;
const BlockNode *left = x ? &s->block[index-1] : &null_block;
const BlockNode *top = y ? &s->block[index-w] : &null_block;
const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
int pl = left->color[0];
int pcb= left->color[1];
int pcr= left->color[2];
int pmx, pmy;
int mx=0, my=0;
int l,cr,cb;
const int stride= s->current_picture->linesize[0];
const int uvstride= s->current_picture->linesize[1];
const uint8_t *const current_data[3] = { s->input_picture->data[0] + (x + y* stride)*block_w,
s->input_picture->data[1] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift),
s->input_picture->data[2] + ((x*block_w)>>s->chroma_h_shift) + ((y*uvstride*block_w)>>s->chroma_v_shift)};
int P[10][2];
int16_t last_mv[3][2];
int qpel= !!(s->avctx->flags & AV_CODEC_FLAG_QPEL); //unused
const int shift= 1+qpel;
int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
int mx_context= av_log2(2*FFABS(left->mx - top->mx));
int my_context= av_log2(2*FFABS(left->my - top->my));
int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
int ref, best_ref, ref_score, ref_mx, ref_my;
int range = MAX_MV >> (1 + qpel);
av_assert0(sizeof(s->block_state) >= 256);
if(s->keyframe){
set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
return 0;
}
// clip predictors / edge ?
P_LEFT[0]= left->mx;
P_LEFT[1]= left->my;
P_TOP [0]= top->mx;
P_TOP [1]= top->my;
P_TOPRIGHT[0]= tr->mx;
P_TOPRIGHT[1]= tr->my;
last_mv[0][0]= s->block[index].mx;
last_mv[0][1]= s->block[index].my;
last_mv[1][0]= right->mx;
last_mv[1][1]= right->my;
last_mv[2][0]= bottom->mx;
last_mv[2][1]= bottom->my;
enc->m.mb_stride = 2;
enc->m.mb_x =
enc->m.mb_y = 0;
c->skip= 0;
av_assert1(c-> stride == stride);
av_assert1(c->uvstride == uvstride);
c->penalty_factor = get_penalty_factor(enc->lambda, enc->lambda2, c->avctx->me_cmp);
c->sub_penalty_factor= get_penalty_factor(enc->lambda, enc->lambda2, c->avctx->me_sub_cmp);
c->mb_penalty_factor = get_penalty_factor(enc->lambda, enc->lambda2, c->avctx->mb_cmp);
c->current_mv_penalty = c->mv_penalty[enc->m.f_code=1] + MAX_DMV;
c->xmin = - x*block_w - 16+3;
c->ymin = - y*block_w - 16+3;
c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
c->xmin = FFMAX(c->xmin,-range);
c->xmax = FFMIN(c->xmax, range);
c->ymin = FFMAX(c->ymin,-range);
c->ymax = FFMIN(c->ymax, range);
if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
if(P_TOPRIGHT[0] < (c->xmin * (1<<shift))) P_TOPRIGHT[0]= (c->xmin * (1<<shift));
if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
if (!y) {
c->pred_x= P_LEFT[0];
c->pred_y= P_LEFT[1];
} else {
c->pred_x = P_MEDIAN[0];
c->pred_y = P_MEDIAN[1];
}
score= INT_MAX;
best_ref= 0;
for(ref=0; ref<s->ref_frames; ref++){
init_ref(c, current_data, s->last_picture[ref]->data, NULL, block_w*x, block_w*y, 0);
ref_score= ff_epzs_motion_search(&enc->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
(1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
av_assert2(ref_mx >= c->xmin);
av_assert2(ref_mx <= c->xmax);
av_assert2(ref_my >= c->ymin);
av_assert2(ref_my <= c->ymax);
ref_score= c->sub_motion_search(&enc->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
ref_score= ff_get_mb_score(&enc->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
if(s->ref_mvs[ref]){
s->ref_mvs[ref][index][0]= ref_mx;
s->ref_mvs[ref][index][1]= ref_my;
s->ref_scores[ref][index]= ref_score;
}
if(score > ref_score){
score= ref_score;
best_ref= ref;
mx= ref_mx;
my= ref_my;
}
}
//FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
// subpel search
base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
pc= s->c;
pc.bytestream_start=
pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
memcpy(p_state, s->block_state, sizeof(s->block_state));
if(level!=s->block_max_depth)
put_rac(&pc, &p_state[4 + s_context], 1);
put_rac(&pc, &p_state[1 + left->type + top->type], 0);
if(s->ref_frames > 1)
put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
p_len= pc.bytestream - pc.bytestream_start;
score += (enc->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
block_s= block_w*block_w;
sum = pix_sum(current_data[0], stride, block_w, block_w);
l= (sum + block_s/2)/block_s;
iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
if (s->nb_planes > 2) {
block_s= block_w*block_w>>(s->chroma_h_shift + s->chroma_v_shift);
sum = pix_sum(current_data[1], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
cb= (sum + block_s/2)/block_s;
// iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
sum = pix_sum(current_data[2], uvstride, block_w>>s->chroma_h_shift, block_w>>s->chroma_v_shift);
cr= (sum + block_s/2)/block_s;
// iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
}else
cb = cr = 0;
ic= s->c;
ic.bytestream_start=
ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
memcpy(i_state, s->block_state, sizeof(s->block_state));
if(level!=s->block_max_depth)
put_rac(&ic, &i_state[4 + s_context], 1);
put_rac(&ic, &i_state[1 + left->type + top->type], 1);
put_symbol(&ic, &i_state[32], l-pl , 1);
if (s->nb_planes > 2) {
put_symbol(&ic, &i_state[64], cb-pcb, 1);
put_symbol(&ic, &i_state[96], cr-pcr, 1);
}
i_len= ic.bytestream - ic.bytestream_start;
iscore += (enc->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
av_assert1(iscore < 255*255*256 + enc->lambda2*10);
av_assert1(iscore >= 0);
av_assert1(l>=0 && l<=255);
av_assert1(pl>=0 && pl<=255);
if(level==0){
int varc= iscore >> 8;
int vard= score >> 8;
if (vard <= 64 || vard < varc)
c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
else
c->scene_change_score += enc->m.qscale;
}
if(level!=s->block_max_depth){
put_rac(&s->c, &s->block_state[4 + s_context], 0);
score2 = encode_q_branch(enc, level+1, 2*x+0, 2*y+0);
score2+= encode_q_branch(enc, level+1, 2*x+1, 2*y+0);
score2+= encode_q_branch(enc, level+1, 2*x+0, 2*y+1);
score2+= encode_q_branch(enc, level+1, 2*x+1, 2*y+1);
score2+= enc->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
if(score2 < score && score2 < iscore)
return score2;
}
if(iscore < score){
pred_mv(s, &pmx, &pmy, 0, left, top, tr);
memcpy(pbbak, i_buffer, i_len);
s->c= ic;
s->c.bytestream_start= pbbak_start;
s->c.bytestream= pbbak + i_len;
set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
memcpy(s->block_state, i_state, sizeof(s->block_state));
return iscore;
}else{
memcpy(pbbak, p_buffer, p_len);
s->c= pc;
s->c.bytestream_start= pbbak_start;
s->c.bytestream= pbbak + p_len;
set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
memcpy(s->block_state, p_state, sizeof(s->block_state));
return score;
}
}
static void encode_q_branch2(SnowContext *s, int level, int x, int y){
const int w= s->b_width << s->block_max_depth;
const int rem_depth= s->block_max_depth - level;
const int index= (x + y*w) << rem_depth;
int trx= (x+1)<<rem_depth;
BlockNode *b= &s->block[index];
const BlockNode *left = x ? &s->block[index-1] : &null_block;
const BlockNode *top = y ? &s->block[index-w] : &null_block;
const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
int pl = left->color[0];
int pcb= left->color[1];
int pcr= left->color[2];
int pmx, pmy;
int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
if(s->keyframe){
set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
return;
}
if(level!=s->block_max_depth){
if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
put_rac(&s->c, &s->block_state[4 + s_context], 1);
}else{
put_rac(&s->c, &s->block_state[4 + s_context], 0);
encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
return;
}
}
if(b->type & BLOCK_INTRA){
pred_mv(s, &pmx, &pmy, 0, left, top, tr);
put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
if (s->nb_planes > 2) {
put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
}
set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
}else{
pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
if(s->ref_frames > 1)
put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
}
}
static int get_dc(SnowEncContext *enc, int mb_x, int mb_y, int plane_index)
{
SnowContext *const s = &enc->com;
int i, x2, y2;
Plane *p= &s->plane[plane_index];
const int block_size = MB_SIZE >> s->block_max_depth;
const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
const int ref_stride= s->current_picture->linesize[plane_index];
const uint8_t *src = s->input_picture->data[plane_index];
IDWTELEM *dst= (IDWTELEM*)enc->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
const int b_stride = s->b_width << s->block_max_depth;
const int w= p->width;
const int h= p->height;
int index= mb_x + mb_y*b_stride;
BlockNode *b= &s->block[index];
BlockNode backup= *b;
int ab=0;
int aa=0;
av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc stuff above
b->type|= BLOCK_INTRA;
b->color[plane_index]= 0;
memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
for(i=0; i<4; i++){
int mb_x2= mb_x + (i &1) - 1;
int mb_y2= mb_y + (i>>1) - 1;
int x= block_w*mb_x2 + block_w/2;
int y= block_h*mb_y2 + block_h/2;
add_yblock(s, 0, NULL, dst + (i&1)*block_w + (i>>1)*obmc_stride*block_h, NULL, obmc,
x, y, block_w, block_h, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_h); y2++){
for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_h*mb_y - block_h/2))*obmc_stride;
int obmc_v= obmc[index];
int d;
if(y<0) obmc_v += obmc[index + block_h*obmc_stride];
if(x<0) obmc_v += obmc[index + block_w];
if(y+block_h>h) obmc_v += obmc[index - block_h*obmc_stride];
if(x+block_w>w) obmc_v += obmc[index - block_w];
//FIXME precalculate this or simplify it somehow else
d = -dst[index] + (1<<(FRAC_BITS-1));
dst[index] = d;
ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
aa += obmc_v * obmc_v; //FIXME precalculate this
}
}
}
*b= backup;
return av_clip_uint8( ROUNDED_DIV((int64_t)ab<<LOG2_OBMC_MAX, aa) ); //FIXME we should not need clipping
}
static inline int get_block_bits(SnowContext *s, int x, int y, int w){
const int b_stride = s->b_width << s->block_max_depth;
const int b_height = s->b_height<< s->block_max_depth;
int index= x + y*b_stride;
const BlockNode *b = &s->block[index];
const BlockNode *left = x ? &s->block[index-1] : &null_block;
const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
int dmx, dmy;
// int mx_context= av_log2(2*FFABS(left->mx - top->mx));
// int my_context= av_log2(2*FFABS(left->my - top->my));
if(x<0 || x>=b_stride || y>=b_height)
return 0;
/*
1 0 0
01X 1-2 1
001XX 3-6 2-3
0001XXX 7-14 4-7
00001XXXX 15-30 8-15
*/
//FIXME try accurate rate
//FIXME intra and inter predictors if surrounding blocks are not the same type
if(b->type & BLOCK_INTRA){
return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
+ av_log2(2*FFABS(left->color[1] - b->color[1]))
+ av_log2(2*FFABS(left->color[2] - b->color[2])));
}else{
pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
dmx-= b->mx;
dmy-= b->my;
return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
+ av_log2(2*FFABS(dmy))
+ av_log2(2*b->ref));
}
}
static int get_block_rd(SnowEncContext *enc, int mb_x, int mb_y,
int plane_index, uint8_t (*obmc_edged)[MB_SIZE * 2])
{
SnowContext *const s = &enc->com;
Plane *p= &s->plane[plane_index];
const int block_size = MB_SIZE >> s->block_max_depth;
const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
const int ref_stride= s->current_picture->linesize[plane_index];
uint8_t *dst= s->current_picture->data[plane_index];
const uint8_t *src = s->input_picture->data[plane_index];
IDWTELEM *pred= (IDWTELEM*)enc->m.sc.obmc_scratchpad + plane_index*block_size*block_size*4;
uint8_t *cur = s->scratchbuf;
uint8_t *tmp = s->emu_edge_buffer;
const int b_stride = s->b_width << s->block_max_depth;
const int b_height = s->b_height<< s->block_max_depth;
const int w= p->width;
const int h= p->height;
int distortion;
int rate= 0;
const int penalty_factor = get_penalty_factor(enc->lambda, enc->lambda2, s->avctx->me_cmp);
int sx= block_w*mb_x - block_w/2;
int sy= block_h*mb_y - block_h/2;
int x0= FFMAX(0,-sx);
int y0= FFMAX(0,-sy);
int x1= FFMIN(block_w*2, w-sx);
int y1= FFMIN(block_h*2, h-sy);
int i,x,y;
av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below chckinhg only block_w
ff_snow_pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_h*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
for(y=y0; y<y1; y++){
const uint8_t *obmc1= obmc_edged[y];
const IDWTELEM *pred1 = pred + y*obmc_stride;
uint8_t *cur1 = cur + y*ref_stride;
uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
for(x=x0; x<x1; x++){
#if FRAC_BITS >= LOG2_OBMC_MAX
int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
#else
int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
#endif
v = (v + pred1[x]) >> FRAC_BITS;
if(v&(~255)) v= ~(v>>31);
dst1[x] = v;
}
}
/* copy the regions where obmc[] = (uint8_t)256 */
if(LOG2_OBMC_MAX == 8
&& (mb_x == 0 || mb_x == b_stride-1)
&& (mb_y == 0 || mb_y == b_height-1)){
if(mb_x == 0)
x1 = block_w;
else
x0 = block_w;
if(mb_y == 0)
y1 = block_h;
else
y0 = block_h;
for(y=y0; y<y1; y++)
memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
}
if(block_w==16){
/* FIXME rearrange dsputil to fit 32x32 cmp functions */
/* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
/* FIXME cmps overlap but do not cover the wavelet's whole support.
* So improving the score of one block is not strictly guaranteed
* to improve the score of the whole frame, thus iterative motion
* estimation does not always converge. */
if(s->avctx->me_cmp == FF_CMP_W97)
distortion = ff_w97_32_c(&enc->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
else if(s->avctx->me_cmp == FF_CMP_W53)
distortion = ff_w53_32_c(&enc->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
else{
distortion = 0;
for(i=0; i<4; i++){
int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
distortion += enc->m.me.me_cmp[0](&enc->m, src + off, dst + off, ref_stride, 16);
}
}
}else{
av_assert2(block_w==8);
distortion = enc->m.me.me_cmp[0](&enc->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
}
if(plane_index==0){
for(i=0; i<4; i++){
/* ..RRr
* .RXx.
* rxx..
*/
rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
}
if(mb_x == b_stride-2)
rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
}
return distortion + rate*penalty_factor;
}
static int get_4block_rd(SnowEncContext *enc, int mb_x, int mb_y, int plane_index)
{
SnowContext *const s = &enc->com;
int i, y2;
Plane *p= &s->plane[plane_index];
const int block_size = MB_SIZE >> s->block_max_depth;
const int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
const int ref_stride= s->current_picture->linesize[plane_index];
uint8_t *dst= s->current_picture->data[plane_index];
const uint8_t *src = s->input_picture->data[plane_index];
//FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
// const has only been removed from zero_dst to suppress a warning
static IDWTELEM zero_dst[4096]; //FIXME
const int b_stride = s->b_width << s->block_max_depth;
const int w= p->width;
const int h= p->height;
int distortion= 0;
int rate= 0;
const int penalty_factor= get_penalty_factor(enc->lambda, enc->lambda2, s->avctx->me_cmp);
av_assert2(s->chroma_h_shift == s->chroma_v_shift); //obmc and square assumtions below
for(i=0; i<9; i++){
int mb_x2= mb_x + (i%3) - 1;
int mb_y2= mb_y + (i/3) - 1;
int x= block_w*mb_x2 + block_w/2;
int y= block_h*mb_y2 + block_h/2;
add_yblock(s, 0, NULL, zero_dst, dst, obmc,
x, y, block_w, block_h, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
//FIXME find a cleaner/simpler way to skip the outside stuff
for(y2= y; y2<0; y2++)
memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
for(y2= h; y2<y+block_h; y2++)
memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
if(x<0){
for(y2= y; y2<y+block_h; y2++)
memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
}
if(x+block_w > w){
for(y2= y; y2<y+block_h; y2++)
memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
}
av_assert1(block_w== 8 || block_w==16);
distortion += enc->m.me.me_cmp[block_w==8](&enc->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_h);
}
if(plane_index==0){
BlockNode *b= &s->block[mb_x+mb_y*b_stride];
int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
/* ..RRRr
* .RXXx.
* .RXXx.
* rxxx.
*/
if(merged)
rate = get_block_bits(s, mb_x, mb_y, 2);
for(i=merged?4:0; i<9; i++){
static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
}
}
return distortion + rate*penalty_factor;
}
static int encode_subband_c0run(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
const int w= b->width;
const int h= b->height;
int x, y;
if(1){
int run=0;
int *runs = s->run_buffer;
int run_index=0;
int max_index;
for(y=0; y<h; y++){
for(x=0; x<w; x++){
int v, p=0;
int /*ll=0, */l=0, lt=0, t=0, rt=0;
v= src[x + y*stride];
if(y){
t= src[x + (y-1)*stride];
if(x){
lt= src[x - 1 + (y-1)*stride];
}
if(x + 1 < w){
rt= src[x + 1 + (y-1)*stride];
}
}
if(x){
l= src[x - 1 + y*stride];
/*if(x > 1){
if(orientation==1) ll= src[y + (x-2)*stride];
else ll= src[x - 2 + y*stride];
}*/
}
if(parent){
int px= x>>1;
int py= y>>1;
if(px<b->parent->width && py<b->parent->height)
p= parent[px + py*2*stride];
}
if(!(/*ll|*/l|lt|t|rt|p)){
if(v){
runs[run_index++]= run;
run=0;
}else{
run++;
}
}
}
}
max_index= run_index;
runs[run_index++]= run;
run_index=0;
run= runs[run_index++];
put_symbol2(&s->c, b->state[30], max_index, 0);
if(run_index <= max_index)
put_symbol2(&s->c, b->state[1], run, 3);
for(y=0; y<h; y++){
if(s->c.bytestream_end - s->c.bytestream < w*40){
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return AVERROR(ENOMEM);
}
for(x=0; x<w; x++){
int v, p=0;
int /*ll=0, */l=0, lt=0, t=0, rt=0;
v= src[x + y*stride];
if(y){
t= src[x + (y-1)*stride];
if(x){
lt= src[x - 1 + (y-1)*stride];
}
if(x + 1 < w){
rt= src[x + 1 + (y-1)*stride];
}
}
if(x){
l= src[x - 1 + y*stride];
/*if(x > 1){
if(orientation==1) ll= src[y + (x-2)*stride];
else ll= src[x - 2 + y*stride];
}*/
}
if(parent){
int px= x>>1;
int py= y>>1;
if(px<b->parent->width && py<b->parent->height)
p= parent[px + py*2*stride];
}
if(/*ll|*/l|lt|t|rt|p){
int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
put_rac(&s->c, &b->state[0][context], !!v);
}else{
if(!run){
run= runs[run_index++];
if(run_index <= max_index)
put_symbol2(&s->c, b->state[1], run, 3);
av_assert2(v);
}else{
run--;
av_assert2(!v);
}
}
if(v){
int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
int l2= 2*FFABS(l) + (l<0);
int t2= 2*FFABS(t) + (t<0);
put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
put_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l2&0xFF] + 3*ff_quant3bA[t2&0xFF]], v<0);
}
}
}
}
return 0;
}
static int encode_subband(SnowContext *s, SubBand *b, const IDWTELEM *src, const IDWTELEM *parent, int stride, int orientation){
// encode_subband_qtree(s, b, src, parent, stride, orientation);
// encode_subband_z0run(s, b, src, parent, stride, orientation);
return encode_subband_c0run(s, b, src, parent, stride, orientation);
// encode_subband_dzr(s, b, src, parent, stride, orientation);
}
static av_always_inline int check_block_intra(SnowEncContext *enc, int mb_x, int mb_y, int p[3],
uint8_t (*obmc_edged)[MB_SIZE * 2], int *best_rd)
{
SnowContext *const s = &enc->com;
const int b_stride= s->b_width << s->block_max_depth;
BlockNode *block= &s->block[mb_x + mb_y * b_stride];
BlockNode backup= *block;
int rd;
av_assert2(mb_x>=0 && mb_y>=0);
av_assert2(mb_x<b_stride);
block->color[0] = p[0];
block->color[1] = p[1];
block->color[2] = p[2];
block->type |= BLOCK_INTRA;
rd = get_block_rd(enc, mb_x, mb_y, 0, obmc_edged) + enc->intra_penalty;
//FIXME chroma
if(rd < *best_rd){
*best_rd= rd;
return 1;
}else{
*block= backup;
return 0;
}
}
/* special case for int[2] args we discard afterwards,
* fixes compilation problem with gcc 2.95 */
static av_always_inline int check_block_inter(SnowEncContext *enc,
int mb_x, int mb_y, int p0, int p1,
uint8_t (*obmc_edged)[MB_SIZE * 2], int *best_rd)
{
SnowContext *const s = &enc->com;
const int b_stride = s->b_width << s->block_max_depth;
BlockNode *block = &s->block[mb_x + mb_y * b_stride];
BlockNode backup = *block;
unsigned value;
int rd, index;
av_assert2(mb_x >= 0 && mb_y >= 0);
av_assert2(mb_x < b_stride);
index = (p0 + 31 * p1) & (ME_CACHE_SIZE-1);
value = enc->me_cache_generation + (p0 >> 10) + p1 * (1 << 6) + (block->ref << 12);
if (enc->me_cache[index] == value)
return 0;
enc->me_cache[index] = value;
block->mx = p0;
block->my = p1;
block->type &= ~BLOCK_INTRA;
rd = get_block_rd(enc, mb_x, mb_y, 0, obmc_edged);
//FIXME chroma
if (rd < *best_rd) {
*best_rd = rd;
return 1;
} else {
*block = backup;
return 0;
}
}
static av_always_inline int check_4block_inter(SnowEncContext *enc, int mb_x, int mb_y,
int p0, int p1, int ref, int *best_rd)
{
SnowContext *const s = &enc->com;
const int b_stride= s->b_width << s->block_max_depth;
BlockNode *block= &s->block[mb_x + mb_y * b_stride];
BlockNode backup[4];
unsigned value;
int rd, index;
/* We don't initialize backup[] during variable declaration, because
* that fails to compile on MSVC: "cannot convert from 'BlockNode' to
* 'int16_t'". */
backup[0] = block[0];
backup[1] = block[1];
backup[2] = block[b_stride];
backup[3] = block[b_stride + 1];
av_assert2(mb_x>=0 && mb_y>=0);
av_assert2(mb_x<b_stride);
av_assert2(((mb_x|mb_y)&1) == 0);
index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
value = enc->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
if (enc->me_cache[index] == value)
return 0;
enc->me_cache[index] = value;
block->mx= p0;
block->my= p1;
block->ref= ref;
block->type &= ~BLOCK_INTRA;
block[1]= block[b_stride]= block[b_stride+1]= *block;
rd = get_4block_rd(enc, mb_x, mb_y, 0);
//FIXME chroma
if(rd < *best_rd){
*best_rd= rd;
return 1;
}else{
block[0]= backup[0];
block[1]= backup[1];
block[b_stride]= backup[2];
block[b_stride+1]= backup[3];
return 0;
}
}
static void iterative_me(SnowEncContext *enc)
{
SnowContext *const s = &enc->com;
int pass, mb_x, mb_y;
const int b_width = s->b_width << s->block_max_depth;
const int b_height= s->b_height << s->block_max_depth;
const int b_stride= b_width;
int color[3];
{
RangeCoder r = s->c;
uint8_t state[sizeof(s->block_state)];
memcpy(state, s->block_state, sizeof(s->block_state));
for(mb_y= 0; mb_y<s->b_height; mb_y++)
for(mb_x= 0; mb_x<s->b_width; mb_x++)
encode_q_branch(enc, 0, mb_x, mb_y);
s->c = r;
memcpy(s->block_state, state, sizeof(s->block_state));
}
for(pass=0; pass<25; pass++){
int change= 0;
for(mb_y= 0; mb_y<b_height; mb_y++){
for(mb_x= 0; mb_x<b_width; mb_x++){
int dia_change, i, j, ref;
int best_rd= INT_MAX, ref_rd;
BlockNode backup, ref_b;
const int index= mb_x + mb_y * b_stride;
BlockNode *block= &s->block[index];
BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
const int b_w= (MB_SIZE >> s->block_max_depth);
uint8_t obmc_edged[MB_SIZE * 2][MB_SIZE * 2];
if(pass && (block->type & BLOCK_OPT))
continue;
block->type |= BLOCK_OPT;
backup= *block;
if (!enc->me_cache_generation)
memset(enc->me_cache, 0, sizeof(enc->me_cache));
enc->me_cache_generation += 1<<22;
//FIXME precalculate
{
int x, y;
for (y = 0; y < b_w * 2; y++)
memcpy(obmc_edged[y], ff_obmc_tab[s->block_max_depth] + y * b_w * 2, b_w * 2);
if(mb_x==0)
for(y=0; y<b_w*2; y++)
memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
if(mb_x==b_stride-1)
for(y=0; y<b_w*2; y++)
memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
if(mb_y==0){
for(x=0; x<b_w*2; x++)
obmc_edged[0][x] += obmc_edged[b_w-1][x];
for(y=1; y<b_w; y++)
memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
}
if(mb_y==b_height-1){
for(x=0; x<b_w*2; x++)
obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
for(y=b_w; y<b_w*2-1; y++)
memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
}
}
//skip stuff outside the picture
if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
const uint8_t *src = s->input_picture->data[0];
uint8_t *dst= s->current_picture->data[0];
const int stride= s->current_picture->linesize[0];
const int block_w= MB_SIZE >> s->block_max_depth;
const int block_h= MB_SIZE >> s->block_max_depth;
const int sx= block_w*mb_x - block_w/2;
const int sy= block_h*mb_y - block_h/2;
const int w= s->plane[0].width;
const int h= s->plane[0].height;
int y;
for(y=sy; y<0; y++)
memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
for(y=h; y<sy+block_h*2; y++)
memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
if(sx<0){
for(y=sy; y<sy+block_h*2; y++)
memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
}
if(sx+block_w*2 > w){
for(y=sy; y<sy+block_h*2; y++)
memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
}
}
// intra(black) = neighbors' contribution to the current block
for(i=0; i < s->nb_planes; i++)
color[i]= get_dc(enc, mb_x, mb_y, i);
// get previous score (cannot be cached due to OBMC)
if(pass > 0 && (block->type&BLOCK_INTRA)){
int color0[3]= {block->color[0], block->color[1], block->color[2]};
check_block_intra(enc, mb_x, mb_y, color0, obmc_edged, &best_rd);
}else
check_block_inter(enc, mb_x, mb_y, block->mx, block->my, obmc_edged, &best_rd);
ref_b= *block;
ref_rd= best_rd;
for(ref=0; ref < s->ref_frames; ref++){
int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
continue;
block->ref= ref;
best_rd= INT_MAX;
check_block_inter(enc, mb_x, mb_y, mvr[0][0], mvr[0][1], obmc_edged, &best_rd);
check_block_inter(enc, mb_x, mb_y, 0, 0, obmc_edged, &best_rd);
if(tb)
check_block_inter(enc, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], obmc_edged, &best_rd);
if(lb)
check_block_inter(enc, mb_x, mb_y, mvr[-1][0], mvr[-1][1], obmc_edged, &best_rd);
if(rb)
check_block_inter(enc, mb_x, mb_y, mvr[1][0], mvr[1][1], obmc_edged, &best_rd);
if(bb)
check_block_inter(enc, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], obmc_edged, &best_rd);
/* fullpel ME */
//FIXME avoid subpel interpolation / round to nearest integer
do{
int newx = block->mx;
int newy = block->my;
int dia_size = enc->iterative_dia_size ? enc->iterative_dia_size : FFMAX(s->avctx->dia_size, 1);
dia_change=0;
for(i=0; i < dia_size; i++){
for(j=0; j<i; j++){
dia_change |= check_block_inter(enc, mb_x, mb_y, newx+4*(i-j), newy+(4*j), obmc_edged, &best_rd);
dia_change |= check_block_inter(enc, mb_x, mb_y, newx-4*(i-j), newy-(4*j), obmc_edged, &best_rd);
dia_change |= check_block_inter(enc, mb_x, mb_y, newx-(4*j), newy+4*(i-j), obmc_edged, &best_rd);
dia_change |= check_block_inter(enc, mb_x, mb_y, newx+(4*j), newy-4*(i-j), obmc_edged, &best_rd);
}
}
}while(dia_change);
/* subpel ME */
do{
static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
dia_change=0;
for(i=0; i<8; i++)
dia_change |= check_block_inter(enc, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], obmc_edged, &best_rd);
}while(dia_change);
//FIXME or try the standard 2 pass qpel or similar
mvr[0][0]= block->mx;
mvr[0][1]= block->my;
if(ref_rd > best_rd){
ref_rd= best_rd;
ref_b= *block;
}
}
best_rd= ref_rd;
*block= ref_b;
check_block_intra(enc, mb_x, mb_y, color, obmc_edged, &best_rd);
//FIXME RD style color selection
if(!same_block(block, &backup)){
if(tb ) tb ->type &= ~BLOCK_OPT;
if(lb ) lb ->type &= ~BLOCK_OPT;
if(rb ) rb ->type &= ~BLOCK_OPT;
if(bb ) bb ->type &= ~BLOCK_OPT;
if(tlb) tlb->type &= ~BLOCK_OPT;
if(trb) trb->type &= ~BLOCK_OPT;
if(blb) blb->type &= ~BLOCK_OPT;
if(brb) brb->type &= ~BLOCK_OPT;
change ++;
}
}
}
av_log(s->avctx, AV_LOG_DEBUG, "pass:%d changed:%d\n", pass, change);
if(!change)
break;
}
if(s->block_max_depth == 1){
int change= 0;
for(mb_y= 0; mb_y<b_height; mb_y+=2){
for(mb_x= 0; mb_x<b_width; mb_x+=2){
int i;
int best_rd, init_rd;
const int index= mb_x + mb_y * b_stride;
BlockNode *b[4];
b[0]= &s->block[index];
b[1]= b[0]+1;
b[2]= b[0]+b_stride;
b[3]= b[2]+1;
if(same_block(b[0], b[1]) &&
same_block(b[0], b[2]) &&
same_block(b[0], b[3]))
continue;
if (!enc->me_cache_generation)
memset(enc->me_cache, 0, sizeof(enc->me_cache));
enc->me_cache_generation += 1<<22;
init_rd = best_rd = get_4block_rd(enc, mb_x, mb_y, 0);
//FIXME more multiref search?
check_4block_inter(enc, mb_x, mb_y,
(b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
(b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
for(i=0; i<4; i++)
if(!(b[i]->type&BLOCK_INTRA))
check_4block_inter(enc, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
if(init_rd != best_rd)
change++;
}
}
av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
}
}
static void encode_blocks(SnowEncContext *enc, int search)
{
SnowContext *const s = &enc->com;
int x, y;
int w= s->b_width;
int h= s->b_height;
if (enc->motion_est == FF_ME_ITER && !s->keyframe && search)
iterative_me(enc);
for(y=0; y<h; y++){
if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return;
}
for(x=0; x<w; x++){
if (enc->motion_est == FF_ME_ITER || !search)
encode_q_branch2(s, 0, x, y);
else
encode_q_branch (enc, 0, x, y);
}
}
}
static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
const int w= b->width;
const int h= b->height;
const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
const int qmul= ff_qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
int x,y, thres1, thres2;
if(s->qlog == LOSSLESS_QLOG){
for(y=0; y<h; y++)
for(x=0; x<w; x++)
dst[x + y*stride]= src[x + y*stride];
return;
}
bias= bias ? 0 : (3*qmul)>>3;
thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
thres2= 2*thres1;
if(!bias){
for(y=0; y<h; y++){
for(x=0; x<w; x++){
int i= src[x + y*stride];
if((unsigned)(i+thres1) > thres2){
if(i>=0){
i<<= QEXPSHIFT;
i/= qmul; //FIXME optimize
dst[x + y*stride]= i;
}else{
i= -i;
i<<= QEXPSHIFT;
i/= qmul; //FIXME optimize
dst[x + y*stride]= -i;
}
}else
dst[x + y*stride]= 0;
}
}
}else{
for(y=0; y<h; y++){
for(x=0; x<w; x++){
int i= src[x + y*stride];
if((unsigned)(i+thres1) > thres2){
if(i>=0){
i<<= QEXPSHIFT;
i= (i + bias) / qmul; //FIXME optimize
dst[x + y*stride]= i;
}else{
i= -i;
i<<= QEXPSHIFT;
i= (i + bias) / qmul; //FIXME optimize
dst[x + y*stride]= -i;
}
}else
dst[x + y*stride]= 0;
}
}
}
}
static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
const int w= b->width;
const int h= b->height;
const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
int x,y;
if(s->qlog == LOSSLESS_QLOG) return;
for(y=0; y<h; y++){
for(x=0; x<w; x++){
int i= src[x + y*stride];
if(i<0){
src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
}else if(i>0){
src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
}
}
}
}
static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
const int w= b->width;
const int h= b->height;
int x,y;
for(y=h-1; y>=0; y--){
for(x=w-1; x>=0; x--){
int i= x + y*stride;
if(x){
if(use_median){
if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
else src[i] -= src[i - 1];
}else{
if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
else src[i] -= src[i - 1];
}
}else{
if(y) src[i] -= src[i - stride];
}
}
}
}
static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
const int w= b->width;
const int h= b->height;
int x,y;
for(y=0; y<h; y++){
for(x=0; x<w; x++){
int i= x + y*stride;
if(x){
if(use_median){
if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
else src[i] += src[i - 1];
}else{
if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
else src[i] += src[i - 1];
}
}else{
if(y) src[i] += src[i - stride];
}
}
}
}
static void encode_qlogs(SnowContext *s){
int plane_index, level, orientation;
for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
for(level=0; level<s->spatial_decomposition_count; level++){
for(orientation=level ? 1:0; orientation<4; orientation++){
if(orientation==2) continue;
put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
}
}
}
}
static void encode_header(SnowContext *s){
int plane_index, i;
uint8_t kstate[32];
memset(kstate, MID_STATE, sizeof(kstate));
put_rac(&s->c, kstate, s->keyframe);
if(s->keyframe || s->always_reset){
ff_snow_reset_contexts(s);
s->last_spatial_decomposition_type=
s->last_qlog=
s->last_qbias=
s->last_mv_scale=
s->last_block_max_depth= 0;
for(plane_index=0; plane_index<2; plane_index++){
Plane *p= &s->plane[plane_index];
p->last_htaps=0;
p->last_diag_mc=0;
memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
}
}
if(s->keyframe){
put_symbol(&s->c, s->header_state, s->version, 0);
put_rac(&s->c, s->header_state, s->always_reset);
put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
if (s->nb_planes > 2) {
put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
}
put_rac(&s->c, s->header_state, s->spatial_scalability);
// put_rac(&s->c, s->header_state, s->rate_scalability);
put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
encode_qlogs(s);
}
if(!s->keyframe){
int update_mc=0;
for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
Plane *p= &s->plane[plane_index];
update_mc |= p->last_htaps != p->htaps;
update_mc |= p->last_diag_mc != p->diag_mc;
update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
}
put_rac(&s->c, s->header_state, update_mc);
if(update_mc){
for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
Plane *p= &s->plane[plane_index];
put_rac(&s->c, s->header_state, p->diag_mc);
put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
for(i= p->htaps/2; i; i--)
put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
}
}
if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
put_rac(&s->c, s->header_state, 1);
put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
encode_qlogs(s);
}else
put_rac(&s->c, s->header_state, 0);
}
put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
}
static void update_last_header_values(SnowContext *s){
int plane_index;
if(!s->keyframe){
for(plane_index=0; plane_index<2; plane_index++){
Plane *p= &s->plane[plane_index];
p->last_diag_mc= p->diag_mc;
p->last_htaps = p->htaps;
memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
}
}
s->last_spatial_decomposition_type = s->spatial_decomposition_type;
s->last_qlog = s->qlog;
s->last_qbias = s->qbias;
s->last_mv_scale = s->mv_scale;
s->last_block_max_depth = s->block_max_depth;
s->last_spatial_decomposition_count = s->spatial_decomposition_count;
}
static int qscale2qlog(int qscale){
return lrint(QROOT*log2(qscale / (float)FF_QP2LAMBDA))
+ 61*QROOT/8; ///< 64 > 60
}
static int ratecontrol_1pass(SnowEncContext *enc, AVFrame *pict)
{
SnowContext *const s = &enc->com;
/* Estimate the frame's complexity as a sum of weighted dwt coefficients.
* FIXME we know exact mv bits at this point,
* but ratecontrol isn't set up to include them. */
uint32_t coef_sum= 0;
int level, orientation, delta_qlog;
for(level=0; level<s->spatial_decomposition_count; level++){
for(orientation=level ? 1 : 0; orientation<4; orientation++){
SubBand *b= &s->plane[0].band[level][orientation];
IDWTELEM *buf= b->ibuf;
const int w= b->width;
const int h= b->height;
const int stride= b->stride;
const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
const int qdiv= (1<<16)/qmul;
int x, y;
//FIXME this is ugly
for(y=0; y<h; y++)
for(x=0; x<w; x++)
buf[x+y*stride]= b->buf[x+y*stride];
if(orientation==0)
decorrelate(s, b, buf, stride, 1, 0);
for(y=0; y<h; y++)
for(x=0; x<w; x++)
coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
}
}
/* ugly, ratecontrol just takes a sqrt again */
av_assert0(coef_sum < INT_MAX);
coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
if(pict->pict_type == AV_PICTURE_TYPE_I){
enc->m.mb_var_sum = coef_sum;
enc->m.mc_mb_var_sum = 0;
}else{
enc->m.mc_mb_var_sum = coef_sum;
enc->m.mb_var_sum = 0;
}
pict->quality= ff_rate_estimate_qscale(&enc->m, 1);
if (pict->quality < 0)
return INT_MIN;
enc->lambda= pict->quality * 3/2;
delta_qlog= qscale2qlog(pict->quality) - s->qlog;
s->qlog+= delta_qlog;
return delta_qlog;
}
static void calculate_visual_weight(SnowContext *s, Plane *p){
int width = p->width;
int height= p->height;
int level, orientation, x, y;
for(level=0; level<s->spatial_decomposition_count; level++){
int64_t error=0;
for(orientation=level ? 1 : 0; orientation<4; orientation++){
SubBand *b= &p->band[level][orientation];
IDWTELEM *ibuf= b->ibuf;
memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
for(y=0; y<height; y++){
for(x=0; x<width; x++){
int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
error += d*d;
}
}
if (orientation == 2)
error /= 2;
b->qlog= (int)(QROOT * log2(352256.0/sqrt(error)) + 0.5);
if (orientation != 1)
error = 0;
}
p->band[level][1].qlog = p->band[level][2].qlog;
}
}
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pict, int *got_packet)
{
SnowEncContext *const enc = avctx->priv_data;
SnowContext *const s = &enc->com;
MpegEncContext *const mpv = &enc->m;
RangeCoder * const c= &s->c;
AVCodecInternal *avci = avctx->internal;
AVFrame *pic;
const int width= s->avctx->width;
const int height= s->avctx->height;
int level, orientation, plane_index, i, y, ret;
uint8_t rc_header_bak[sizeof(s->header_state)];
uint8_t rc_block_bak[sizeof(s->block_state)];
if ((ret = ff_alloc_packet(avctx, pkt, s->b_width*s->b_height*MB_SIZE*MB_SIZE*3 + FF_INPUT_BUFFER_MIN_SIZE)) < 0)
return ret;
ff_init_range_encoder(c, pkt->data, pkt->size);
ff_build_rac_states(c, (1LL<<32)/20, 256-8);
for(i=0; i < s->nb_planes; i++){
int hshift= i ? s->chroma_h_shift : 0;
int vshift= i ? s->chroma_v_shift : 0;
for(y=0; y<AV_CEIL_RSHIFT(height, vshift); y++)
memcpy(&s->input_picture->data[i][y * s->input_picture->linesize[i]],
&pict->data[i][y * pict->linesize[i]],
AV_CEIL_RSHIFT(width, hshift));
enc->mpvencdsp.draw_edges(s->input_picture->data[i], s->input_picture->linesize[i],
AV_CEIL_RSHIFT(width, hshift), AV_CEIL_RSHIFT(height, vshift),
EDGE_WIDTH >> hshift, EDGE_WIDTH >> vshift,
EDGE_TOP | EDGE_BOTTOM);
}
emms_c();
pic = s->input_picture;
pic->pict_type = pict->pict_type;
pic->quality = pict->quality;
mpv->picture_number = avctx->frame_num;
if(avctx->flags&AV_CODEC_FLAG_PASS2){
mpv->pict_type = pic->pict_type = mpv->rc_context.entry[avctx->frame_num].new_pict_type;
s->keyframe = pic->pict_type == AV_PICTURE_TYPE_I;
if(!(avctx->flags&AV_CODEC_FLAG_QSCALE)) {
pic->quality = ff_rate_estimate_qscale(mpv, 0);
if (pic->quality < 0)
return -1;
}
}else{
s->keyframe= avctx->gop_size==0 || avctx->frame_num % avctx->gop_size == 0;
mpv->pict_type = pic->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
}
if (enc->pass1_rc && avctx->frame_num == 0)
pic->quality = 2*FF_QP2LAMBDA;
if (pic->quality) {
s->qlog = qscale2qlog(pic->quality);
enc->lambda = pic->quality * 3/2;
}
if (s->qlog < 0 || (!pic->quality && (avctx->flags & AV_CODEC_FLAG_QSCALE))) {
s->qlog= LOSSLESS_QLOG;
enc->lambda = 0;
}//else keep previous frame's qlog until after motion estimation
if (s->current_picture->data[0]) {
int w = s->avctx->width;
int h = s->avctx->height;
enc->mpvencdsp.draw_edges(s->current_picture->data[0],
s->current_picture->linesize[0], w , h ,
EDGE_WIDTH , EDGE_WIDTH , EDGE_TOP | EDGE_BOTTOM);
if (s->current_picture->data[2]) {
enc->mpvencdsp.draw_edges(s->current_picture->data[1],
s->current_picture->linesize[1], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
enc->mpvencdsp.draw_edges(s->current_picture->data[2],
s->current_picture->linesize[2], w>>s->chroma_h_shift, h>>s->chroma_v_shift,
EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);
}
emms_c();
}
ff_snow_frames_prepare(s);
ret = get_encode_buffer(s, s->current_picture);
if (ret < 0)
return ret;
mpv->cur_pic.ptr = &enc->cur_pic;
mpv->cur_pic.ptr->f = s->current_picture;
mpv->cur_pic.ptr->f->pts = pict->pts;
if(pic->pict_type == AV_PICTURE_TYPE_P){
int block_width = (width +15)>>4;
int block_height= (height+15)>>4;
int stride= s->current_picture->linesize[0];
av_assert0(s->current_picture->data[0]);
av_assert0(s->last_picture[0]->data[0]);
mpv->avctx = s->avctx;
mpv->last_pic.ptr = &enc->last_pic;
mpv->last_pic.ptr->f = s->last_picture[0];
mpv-> new_pic = s->input_picture;
mpv->linesize = stride;
mpv->uvlinesize = s->current_picture->linesize[1];
mpv->width = width;
mpv->height = height;
mpv->mb_width = block_width;
mpv->mb_height = block_height;
mpv->mb_stride = mpv->mb_width + 1;
mpv->b8_stride = 2 * mpv->mb_width + 1;
mpv->f_code = 1;
mpv->pict_type = pic->pict_type;
mpv->motion_est = enc->motion_est;
mpv->me.scene_change_score = 0;
mpv->me.dia_size = avctx->dia_size;
mpv->quarter_sample = (s->avctx->flags & AV_CODEC_FLAG_QPEL)!=0;
mpv->out_format = FMT_H263;
mpv->unrestricted_mv = 1;
mpv->lambda = enc->lambda;
mpv->qscale = (mpv->lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
enc->lambda2 = mpv->lambda2 = (mpv->lambda*mpv->lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
mpv->qdsp = enc->qdsp; //move
mpv->hdsp = s->hdsp;
ff_me_init_pic(&enc->m);
s->hdsp = mpv->hdsp;
}
if (enc->pass1_rc) {
memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
}
redo_frame:
s->spatial_decomposition_count= 5;
while( !(width >>(s->chroma_h_shift + s->spatial_decomposition_count))
|| !(height>>(s->chroma_v_shift + s->spatial_decomposition_count)))
s->spatial_decomposition_count--;
if (s->spatial_decomposition_count <= 0) {
av_log(avctx, AV_LOG_ERROR, "Resolution too low\n");
return AVERROR(EINVAL);
}
mpv->pict_type = pic->pict_type;
s->qbias = pic->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
ff_snow_common_init_after_header(avctx);
if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
for(plane_index=0; plane_index < s->nb_planes; plane_index++){
calculate_visual_weight(s, &s->plane[plane_index]);
}
}
encode_header(s);
mpv->misc_bits = 8 * (s->c.bytestream - s->c.bytestream_start);
encode_blocks(enc, 1);
mpv->mv_bits = 8 * (s->c.bytestream - s->c.bytestream_start) - mpv->misc_bits;
for(plane_index=0; plane_index < s->nb_planes; plane_index++){
Plane *p= &s->plane[plane_index];
int w= p->width;
int h= p->height;
int x, y;
// int bits= put_bits_count(&s->c.pb);
if (!enc->memc_only) {
//FIXME optimize
if(pict->data[plane_index]) //FIXME gray hack
for(y=0; y<h; y++){
for(x=0; x<w; x++){
s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
}
}
predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
if( plane_index==0
&& pic->pict_type == AV_PICTURE_TYPE_P
&& !(avctx->flags&AV_CODEC_FLAG_PASS2)
&& mpv->me.scene_change_score > enc->scenechange_threshold) {
ff_init_range_encoder(c, pkt->data, pkt->size);
ff_build_rac_states(c, (1LL<<32)/20, 256-8);
pic->pict_type= AV_PICTURE_TYPE_I;
s->keyframe=1;
s->current_picture->flags |= AV_FRAME_FLAG_KEY;
goto redo_frame;
}
if(s->qlog == LOSSLESS_QLOG){
for(y=0; y<h; y++){
for(x=0; x<w; x++){
s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
}
}
}else{
for(y=0; y<h; y++){
for(x=0; x<w; x++){
s->spatial_dwt_buffer[y*w + x]= s->spatial_idwt_buffer[y*w + x] * (1 << ENCODER_EXTRA_BITS);
}
}
}
ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
if (enc->pass1_rc && plane_index==0) {
int delta_qlog = ratecontrol_1pass(enc, pic);
if (delta_qlog <= INT_MIN)
return -1;
if(delta_qlog){
//reordering qlog in the bitstream would eliminate this reset
ff_init_range_encoder(c, pkt->data, pkt->size);
memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
encode_header(s);
encode_blocks(enc, 0);
}
}
for(level=0; level<s->spatial_decomposition_count; level++){
for(orientation=level ? 1 : 0; orientation<4; orientation++){
SubBand *b= &p->band[level][orientation];
quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
if(orientation==0)
decorrelate(s, b, b->ibuf, b->stride, pic->pict_type == AV_PICTURE_TYPE_P, 0);
if (!enc->no_bitstream)
encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
av_assert0(b->parent==NULL || b->parent->stride == b->stride*2);
if(orientation==0)
correlate(s, b, b->ibuf, b->stride, 1, 0);
}
}
for(level=0; level<s->spatial_decomposition_count; level++){
for(orientation=level ? 1 : 0; orientation<4; orientation++){
SubBand *b= &p->band[level][orientation];
dequantize(s, b, b->ibuf, b->stride);
}
}
ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
if(s->qlog == LOSSLESS_QLOG){
for(y=0; y<h; y++){
for(x=0; x<w; x++){
s->spatial_idwt_buffer[y*w + x] *= 1 << FRAC_BITS;
}
}
}
predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
}else{
//ME/MC only
if(pic->pict_type == AV_PICTURE_TYPE_I){
for(y=0; y<h; y++){
for(x=0; x<w; x++){
s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x]=
pict->data[plane_index][y*pict->linesize[plane_index] + x];
}
}
}else{
memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
}
}
if(s->avctx->flags&AV_CODEC_FLAG_PSNR){
int64_t error= 0;
if(pict->data[plane_index]) //FIXME gray hack
for(y=0; y<h; y++){
for(x=0; x<w; x++){
int d= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x] - pict->data[plane_index][y*pict->linesize[plane_index] + x];
error += d*d;
}
}
s->avctx->error[plane_index] += error;
enc->encoding_error[plane_index] = error;
}
}
emms_c();
update_last_header_values(s);
ff_snow_release_buffer(avctx);
s->current_picture->pict_type = pic->pict_type;
s->current_picture->quality = pic->quality;
mpv->frame_bits = 8 * (s->c.bytestream - s->c.bytestream_start);
mpv->p_tex_bits = mpv->frame_bits - mpv->misc_bits - mpv->mv_bits;
mpv->total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
enc->cur_pic.display_picture_number =
enc->cur_pic.coded_picture_number = avctx->frame_num;
enc->cur_pic.f->quality = pic->quality;
if (enc->pass1_rc)
if (ff_rate_estimate_qscale(mpv, 0) < 0)
return -1;
if(avctx->flags&AV_CODEC_FLAG_PASS1)
ff_write_pass1_stats(mpv);
mpv->last_pict_type = mpv->pict_type;
emms_c();
ff_side_data_set_encoder_stats(pkt, s->current_picture->quality,
enc->encoding_error,
(s->avctx->flags&AV_CODEC_FLAG_PSNR) ? SNOW_MAX_PLANES : 0,
s->current_picture->pict_type);
if (s->avctx->flags & AV_CODEC_FLAG_RECON_FRAME) {
av_frame_replace(avci->recon_frame, s->current_picture);
}
pkt->size = ff_rac_terminate(c, 0);
if (s->current_picture->flags & AV_FRAME_FLAG_KEY)
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
static av_cold int encode_end(AVCodecContext *avctx)
{
SnowEncContext *const enc = avctx->priv_data;
SnowContext *const s = &enc->com;
ff_snow_common_end(s);
ff_rate_control_uninit(&enc->m.rc_context);
av_frame_free(&s->input_picture);
for (int i = 0; i < MAX_REF_FRAMES; i++) {
av_freep(&s->ref_mvs[i]);
av_freep(&s->ref_scores[i]);
}
enc->m.me.temp = NULL;
av_freep(&enc->m.me.scratchpad);
av_freep(&enc->m.me.map);
av_freep(&enc->m.sc.obmc_scratchpad);
av_freep(&avctx->stats_out);
return 0;
}
#define OFFSET(x) offsetof(SnowEncContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{"motion_est", "motion estimation algorithm", OFFSET(motion_est), AV_OPT_TYPE_INT, {.i64 = FF_ME_EPZS }, FF_ME_ZERO, FF_ME_ITER, VE, .unit = "motion_est" },
{ "zero", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ZERO }, 0, 0, VE, .unit = "motion_est" },
{ "epzs", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_EPZS }, 0, 0, VE, .unit = "motion_est" },
{ "xone", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_XONE }, 0, 0, VE, .unit = "motion_est" },
{ "iter", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ITER }, 0, 0, VE, .unit = "motion_est" },
{ "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "no_bitstream", "Skip final bitstream writeout.", OFFSET(no_bitstream), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "intra_penalty", "Penalty for intra blocks in block decission", OFFSET(intra_penalty), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "iterative_dia_size", "Dia size for the iterative ME", OFFSET(iterative_dia_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "sc_threshold", "Scene change threshold", OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, VE },
{ "pred", "Spatial decomposition type", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 0 }, DWT_97, DWT_53, VE, .unit = "pred" },
{ "dwt97", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
{ "dwt53", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
{ "rc_eq", "Set rate control equation. When computing the expression, besides the standard functions "
"defined in the section 'Expression Evaluation', the following functions are available: "
"bits2qp(bits), qp2bits(qp). Also the following constants are available: iTex pTex tex mv "
"fCode iCount mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex avgTex.",
OFFSET(m.rc_eq), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VE },
{ NULL },
};
static const AVClass snowenc_class = {
.class_name = "snow encoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_snow_encoder = {
.p.name = "snow",
CODEC_LONG_NAME("Snow"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_SNOW,
.p.capabilities = AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE |
AV_CODEC_CAP_ENCODER_RECON_FRAME,
.priv_data_size = sizeof(SnowEncContext),
.init = encode_init,
FF_CODEC_ENCODE_CB(encode_frame),
.close = encode_end,
.p.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_NONE
},
.color_ranges = AVCOL_RANGE_MPEG,
.p.priv_class = &snowenc_class,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
};
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