split SVQ1 decoder and encoder in their own files

Originally committed as revision 9507 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 588 insertions, 0 deletions

diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
new file mode 100644
index 0000000000..5345ed6dcf
--- /dev/null
+++ b/libavcodec/svq1enc.c
@@ -0,0 +1,588 @@
+/*
+ * SVQ1 Encoder
+ * Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
+ *
+ * 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
+ */
+
+/**
+ * @file svq1enc.c
+ * Sorenson Vector Quantizer #1 (SVQ1) video codec.
+ * For more information of the SVQ1 algorithm, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ */
+
+
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+
+#include "svq1.h"
+#include "svq1enc_cb.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+
+typedef struct SVQ1Context {
+    MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independent of MpegEncContext, so this will be removed then (FIXME/XXX)
+    AVCodecContext *avctx;
+    DSPContext dsp;
+    AVFrame picture;
+    AVFrame current_picture;
+    AVFrame last_picture;
+    PutBitContext pb;
+    GetBitContext gb;
+
+    PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex
+
+    int frame_width;
+    int frame_height;
+
+    /* Y plane block dimensions */
+    int y_block_width;
+    int y_block_height;
+
+    /* U & V plane (C planes) block dimensions */
+    int c_block_width;
+    int c_block_height;
+
+    uint16_t *mb_type;
+    uint32_t *dummy;
+    int16_t (*motion_val8[3])[2];
+    int16_t (*motion_val16[3])[2];
+
+    int64_t rd_total;
+} SVQ1Context;
+
+static void svq1_write_header(SVQ1Context *s, int frame_type)
+{
+    int i;
+
+    /* frame code */
+    put_bits(&s->pb, 22, 0x20);
+
+    /* temporal reference (sure hope this is a "don't care") */
+    put_bits(&s->pb, 8, 0x00);
+
+    /* frame type */
+    put_bits(&s->pb, 2, frame_type - 1);
+
+    if (frame_type == I_TYPE) {
+
+        /* no checksum since frame code is 0x20 */
+
+        /* no embedded string either */
+
+        /* output 5 unknown bits (2 + 2 + 1) */
+        put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
+
+        for (i = 0; i < 7; i++)
+        {
+            if ((ff_svq1_frame_size_table[i].width == s->frame_width) &&
+                (ff_svq1_frame_size_table[i].height == s->frame_height))
+            {
+                put_bits(&s->pb, 3, i);
+                break;
+            }
+        }
+
+        if (i == 7)
+        {
+            put_bits(&s->pb, 3, 7);
+                put_bits(&s->pb, 12, s->frame_width);
+                put_bits(&s->pb, 12, s->frame_height);
+        }
+    }
+
+    /* no checksum or extra data (next 2 bits get 0) */
+    put_bits(&s->pb, 2, 0);
+}
+
+
+#define QUALITY_THRESHOLD 100
+#define THRESHOLD_MULTIPLIER 0.6
+
+#if defined(HAVE_ALTIVEC)
+#undef vector
+#endif
+
+static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *decoded, int stride, int level, int threshold, int lambda, int intra){
+    int count, y, x, i, j, split, best_mean, best_score, best_count;
+    int best_vector[6];
+    int block_sum[7]= {0, 0, 0, 0, 0, 0};
+    int w= 2<<((level+2)>>1);
+    int h= 2<<((level+1)>>1);
+    int size=w*h;
+    int16_t block[7][256];
+    const int8_t *codebook_sum, *codebook;
+    const uint16_t (*mean_vlc)[2];
+    const uint8_t (*multistage_vlc)[2];
+
+    best_score=0;
+    //FIXME optimize, this doenst need to be done multiple times
+    if(intra){
+        codebook_sum= svq1_intra_codebook_sum[level];
+        codebook= ff_svq1_intra_codebooks[level];
+        mean_vlc= ff_svq1_intra_mean_vlc;
+        multistage_vlc= ff_svq1_intra_multistage_vlc[level];
+        for(y=0; y<h; y++){
+            for(x=0; x<w; x++){
+                int v= src[x + y*stride];
+                block[0][x + w*y]= v;
+                best_score += v*v;
+                block_sum[0] += v;
+            }
+        }
+    }else{
+        codebook_sum= svq1_inter_codebook_sum[level];
+        codebook= ff_svq1_inter_codebooks[level];
+        mean_vlc= ff_svq1_inter_mean_vlc + 256;
+        multistage_vlc= ff_svq1_inter_multistage_vlc[level];
+        for(y=0; y<h; y++){
+            for(x=0; x<w; x++){
+                int v= src[x + y*stride] - ref[x + y*stride];
+                block[0][x + w*y]= v;
+                best_score += v*v;
+                block_sum[0] += v;
+            }
+        }
+    }
+
+    best_count=0;
+    best_score -= ((block_sum[0]*block_sum[0])>>(level+3));
+    best_mean= (block_sum[0] + (size>>1)) >> (level+3);
+
+    if(level<4){
+        for(count=1; count<7; count++){
+            int best_vector_score= INT_MAX;
+            int best_vector_sum=-999, best_vector_mean=-999;
+            const int stage= count-1;
+            const int8_t *vector;
+
+            for(i=0; i<16; i++){
+                int sum= codebook_sum[stage*16 + i];
+                int sqr, diff, score;
+
+                vector = codebook + stage*size*16 + i*size;
+                sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
+                diff= block_sum[stage] - sum;
+                score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
+                if(score < best_vector_score){
+                    int mean= (diff + (size>>1)) >> (level+3);
+                    assert(mean >-300 && mean<300);
+                    mean= av_clip(mean, intra?0:-256, 255);
+                    best_vector_score= score;
+                    best_vector[stage]= i;
+                    best_vector_sum= sum;
+                    best_vector_mean= mean;
+                }
+            }
+            assert(best_vector_mean != -999);
+            vector= codebook + stage*size*16 + best_vector[stage]*size;
+            for(j=0; j<size; j++){
+                block[stage+1][j] = block[stage][j] - vector[j];
+            }
+            block_sum[stage+1]= block_sum[stage] - best_vector_sum;
+            best_vector_score +=
+                lambda*(+ 1 + 4*count
+                        + multistage_vlc[1+count][1]
+                        + mean_vlc[best_vector_mean][1]);
+
+            if(best_vector_score < best_score){
+                best_score= best_vector_score;
+                best_count= count;
+                best_mean= best_vector_mean;
+            }
+        }
+    }
+
+    split=0;
+    if(best_score > threshold && level){
+        int score=0;
+        int offset= (level&1) ? stride*h/2 : w/2;
+        PutBitContext backup[6];
+
+        for(i=level-1; i>=0; i--){
+            backup[i]= s->reorder_pb[i];
+        }
+        score += encode_block(s, src         , ref         , decoded         , stride, level-1, threshold>>1, lambda, intra);
+        score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
+        score += lambda;
+
+        if(score < best_score){
+            best_score= score;
+            split=1;
+        }else{
+            for(i=level-1; i>=0; i--){
+                s->reorder_pb[i]= backup[i];
+            }
+        }
+    }
+    if (level > 0)
+        put_bits(&s->reorder_pb[level], 1, split);
+
+    if(!split){
+        assert((best_mean >= 0 && best_mean<256) || !intra);
+        assert(best_mean >= -256 && best_mean<256);
+        assert(best_count >=0 && best_count<7);
+        assert(level<4 || best_count==0);
+
+        /* output the encoding */
+        put_bits(&s->reorder_pb[level],
+            multistage_vlc[1 + best_count][1],
+            multistage_vlc[1 + best_count][0]);
+        put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
+            mean_vlc[best_mean][0]);
+
+        for (i = 0; i < best_count; i++){
+            assert(best_vector[i]>=0 && best_vector[i]<16);
+            put_bits(&s->reorder_pb[level], 4, best_vector[i]);
+        }
+
+        for(y=0; y<h; y++){
+            for(x=0; x<w; x++){
+                decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
+            }
+        }
+    }
+
+    return best_score;
+}
+
+
+static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
+    int width, int height, int src_stride, int stride)
+{
+    int x, y;
+    int i;
+    int block_width, block_height;
+    int level;
+    int threshold[6];
+    const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
+
+    /* figure out the acceptable level thresholds in advance */
+    threshold[5] = QUALITY_THRESHOLD;
+    for (level = 4; level >= 0; level--)
+        threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
+
+    block_width = (width + 15) / 16;
+    block_height = (height + 15) / 16;
+
+    if(s->picture.pict_type == P_TYPE){
+        s->m.avctx= s->avctx;
+        s->m.current_picture_ptr= &s->m.current_picture;
+        s->m.last_picture_ptr   = &s->m.last_picture;
+        s->m.last_picture.data[0]= ref_plane;
+        s->m.linesize=
+        s->m.last_picture.linesize[0]=
+        s->m.new_picture.linesize[0]=
+        s->m.current_picture.linesize[0]= stride;
+        s->m.width= width;
+        s->m.height= height;
+        s->m.mb_width= block_width;
+        s->m.mb_height= block_height;
+        s->m.mb_stride= s->m.mb_width+1;
+        s->m.b8_stride= 2*s->m.mb_width+1;
+        s->m.f_code=1;
+        s->m.pict_type= s->picture.pict_type;
+        s->m.me_method= s->avctx->me_method;
+        s->m.me.scene_change_score=0;
+        s->m.flags= s->avctx->flags;
+//        s->m.out_format = FMT_H263;
+//        s->m.unrestricted_mv= 1;
+
+        s->m.lambda= s->picture.quality;
+        s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
+        s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
+
+        if(!s->motion_val8[plane]){
+            s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
+            s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
+        }
+
+        s->m.mb_type= s->mb_type;
+
+        //dummies, to avoid segfaults
+        s->m.current_picture.mb_mean=   (uint8_t *)s->dummy;
+        s->m.current_picture.mb_var=    (uint16_t*)s->dummy;
+        s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
+        s->m.current_picture.mb_type= s->dummy;
+
+        s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;
+        s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
+        s->m.dsp= s->dsp; //move
+        ff_init_me(&s->m);
+
+        s->m.me.dia_size= s->avctx->dia_size;
+        s->m.first_slice_line=1;
+        for (y = 0; y < block_height; y++) {
+            uint8_t src[stride*16];
+
+            s->m.new_picture.data[0]= src - y*16*stride; //ugly
+            s->m.mb_y= y;
+
+            for(i=0; i<16 && i + 16*y<height; i++){
+                memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
+                for(x=width; x<16*block_width; x++)
+                    src[i*stride+x]= src[i*stride+x-1];
+            }
+            for(; i<16 && i + 16*y<16*block_height; i++)
+                memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
+
+            for (x = 0; x < block_width; x++) {
+                s->m.mb_x= x;
+                ff_init_block_index(&s->m);
+                ff_update_block_index(&s->m);
+
+                ff_estimate_p_frame_motion(&s->m, x, y);
+            }
+            s->m.first_slice_line=0;
+        }
+
+        ff_fix_long_p_mvs(&s->m);
+        ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
+    }
+
+    s->m.first_slice_line=1;
+    for (y = 0; y < block_height; y++) {
+        uint8_t src[stride*16];
+
+        for(i=0; i<16 && i + 16*y<height; i++){
+            memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
+            for(x=width; x<16*block_width; x++)
+                src[i*stride+x]= src[i*stride+x-1];
+        }
+        for(; i<16 && i + 16*y<16*block_height; i++)
+            memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
+
+        s->m.mb_y= y;
+        for (x = 0; x < block_width; x++) {
+            uint8_t reorder_buffer[3][6][7*32];
+            int count[3][6];
+            int offset = y * 16 * stride + x * 16;
+            uint8_t *decoded= decoded_plane + offset;
+            uint8_t *ref= ref_plane + offset;
+            int score[4]={0,0,0,0}, best;
+            uint8_t temp[16*stride];
+
+            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
+                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+                return -1;
+            }
+
+            s->m.mb_x= x;
+            ff_init_block_index(&s->m);
+            ff_update_block_index(&s->m);
+
+            if(s->picture.pict_type == I_TYPE || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
+                for(i=0; i<6; i++){
+                    init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
+                }
+                if(s->picture.pict_type == P_TYPE){
+                    const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
+                    put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
+                    score[0]= vlc[1]*lambda;
+                }
+                score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
+                for(i=0; i<6; i++){
+                    count[0][i]= put_bits_count(&s->reorder_pb[i]);
+                    flush_put_bits(&s->reorder_pb[i]);
+                }
+            }else
+                score[0]= INT_MAX;
+
+            best=0;
+
+            if(s->picture.pict_type == P_TYPE){
+                const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
+                int mx, my, pred_x, pred_y, dxy;
+                int16_t *motion_ptr;
+
+                motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
+                if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
+                    for(i=0; i<6; i++)
+                        init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
+
+                    put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
+
+                    s->m.pb= s->reorder_pb[5];
+                    mx= motion_ptr[0];
+                    my= motion_ptr[1];
+                    assert(mx>=-32 && mx<=31);
+                    assert(my>=-32 && my<=31);
+                    assert(pred_x>=-32 && pred_x<=31);
+                    assert(pred_y>=-32 && pred_y<=31);
+                    ff_h263_encode_motion(&s->m, mx - pred_x, 1);
+                    ff_h263_encode_motion(&s->m, my - pred_y, 1);
+                    s->reorder_pb[5]= s->m.pb;
+                    score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
+
+                    dxy= (mx&1) + 2*(my&1);
+
+                    s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
+
+                    score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
+                    best= score[1] <= score[0];
+
+                    vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
+                    score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
+                    score[2]+= vlc[1]*lambda;
+                    if(score[2] < score[best] && mx==0 && my==0){
+                        best=2;
+                        s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
+                        for(i=0; i<6; i++){
+                            count[2][i]=0;
+                        }
+                        put_bits(&s->pb, vlc[1], vlc[0]);
+                    }
+                }
+
+                if(best==1){
+                    for(i=0; i<6; i++){
+                        count[1][i]= put_bits_count(&s->reorder_pb[i]);
+                        flush_put_bits(&s->reorder_pb[i]);
+                    }
+                }else{
+                    motion_ptr[0                 ] = motion_ptr[1                 ]=
+                    motion_ptr[2                 ] = motion_ptr[3                 ]=
+                    motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
+                    motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
+                }
+            }
+
+            s->rd_total += score[best];
+
+            for(i=5; i>=0; i--){
+                ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
+            }
+            if(best==0){
+                s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
+            }
+        }
+        s->m.first_slice_line=0;
+    }
+    return 0;
+}
+
+static int svq1_encode_init(AVCodecContext *avctx)
+{
+    SVQ1Context * const s = avctx->priv_data;
+
+    dsputil_init(&s->dsp, avctx);
+    avctx->coded_frame= (AVFrame*)&s->picture;
+
+    s->frame_width = avctx->width;
+    s->frame_height = avctx->height;
+
+    s->y_block_width = (s->frame_width + 15) / 16;
+    s->y_block_height = (s->frame_height + 15) / 16;
+
+    s->c_block_width = (s->frame_width / 4 + 15) / 16;
+    s->c_block_height = (s->frame_height / 4 + 15) / 16;
+
+    s->avctx= avctx;
+    s->m.avctx= avctx;
+    s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
+    s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
+    s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
+    s->mb_type        = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
+    s->dummy          = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
+    h263_encode_init(&s->m); //mv_penalty
+
+    return 0;
+}
+
+static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
+    int buf_size, void *data)
+{
+    SVQ1Context * const s = avctx->priv_data;
+    AVFrame *pict = data;
+    AVFrame * const p= (AVFrame*)&s->picture;
+    AVFrame temp;
+    int i;
+
+    if(avctx->pix_fmt != PIX_FMT_YUV410P){
+        av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
+        return -1;
+    }
+
+    if(!s->current_picture.data[0]){
+        avctx->get_buffer(avctx, &s->current_picture);
+        avctx->get_buffer(avctx, &s->last_picture);
+    }
+
+    temp= s->current_picture;
+    s->current_picture= s->last_picture;
+    s->last_picture= temp;
+
+    init_put_bits(&s->pb, buf, buf_size);
+
+    *p = *pict;
+    p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? P_TYPE : I_TYPE;
+    p->key_frame = p->pict_type == I_TYPE;
+
+    svq1_write_header(s, p->pict_type);
+    for(i=0; i<3; i++){
+        if(svq1_encode_plane(s, i,
+            s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
+            s->frame_width / (i?4:1), s->frame_height / (i?4:1),
+            s->picture.linesize[i], s->current_picture.linesize[i]) < 0)
+                return -1;
+    }
+
+//    align_put_bits(&s->pb);
+    while(put_bits_count(&s->pb) & 31)
+        put_bits(&s->pb, 1, 0);
+
+    flush_put_bits(&s->pb);
+
+    return (put_bits_count(&s->pb) / 8);
+}
+
+static int svq1_encode_end(AVCodecContext *avctx)
+{
+    SVQ1Context * const s = avctx->priv_data;
+    int i;
+
+    av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
+
+    av_freep(&s->m.me.scratchpad);
+    av_freep(&s->m.me.map);
+    av_freep(&s->m.me.score_map);
+    av_freep(&s->mb_type);
+    av_freep(&s->dummy);
+
+    for(i=0; i<3; i++){
+        av_freep(&s->motion_val8[i]);
+        av_freep(&s->motion_val16[i]);
+    }
+
+    return 0;
+}
+
+
+AVCodec svq1_encoder = {
+    "svq1",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_SVQ1,
+    sizeof(SVQ1Context),
+    svq1_encode_init,
+    svq1_encode_frame,
+    svq1_encode_end,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV410P, -1},
+};