lavc: split asv12 encoder/decoder

1 files changed, 287 insertions, 0 deletions

diff --git a/libavcodec/asvenc.c b/libavcodec/asvenc.c
new file mode 100644
index 0000000..bf2cdaf
--- /dev/null
+++ b/libavcodec/asvenc.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2003 Michael Niedermayer
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * ASUS V1/V2 encoder.
+ */
+
+#include "libavutil/common.h"
+#include "libavutil/mem.h"
+
+#include "asv.h"
+#include "avcodec.h"
+#include "mpeg12data.h"
+
+static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
+    put_bits(pb, n, av_reverse[ v << (8-n) ]);
+}
+
+static inline void asv1_put_level(PutBitContext *pb, int level){
+    unsigned int index= level + 3;
+
+    if(index <= 6) put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
+    else{
+        put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]);
+        put_sbits(pb, 8, level);
+    }
+}
+
+static inline void asv2_put_level(PutBitContext *pb, int level){
+    unsigned int index= level + 31;
+
+    if(index <= 62) put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
+    else{
+        put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]);
+        asv2_put_bits(pb, 8, level&0xFF);
+    }
+}
+
+static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
+    int i;
+    int nc_count=0;
+
+    put_bits(&a->pb, 8, (block[0] + 32)>>6);
+    block[0]= 0;
+
+    for(i=0; i<10; i++){
+        const int index = ff_asv_scantab[4*i];
+        int ccp=0;
+
+        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
+        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
+        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
+        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
+
+        if(ccp){
+            for(;nc_count; nc_count--)
+                put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]);
+
+            put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
+
+            if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
+            if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
+            if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
+            if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
+        }else{
+            nc_count++;
+        }
+    }
+    put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]);
+}
+
+static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
+    int i;
+    int count=0;
+
+    for(count=63; count>3; count--){
+        const int index = ff_asv_scantab[count];
+
+        if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
+            break;
+    }
+
+    count >>= 2;
+
+    asv2_put_bits(&a->pb, 4, count);
+    asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
+    block[0]= 0;
+
+    for(i=0; i<=count; i++){
+        const int index = ff_asv_scantab[4*i];
+        int ccp=0;
+
+        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
+        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
+        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
+        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
+
+        assert(i || ccp<8);
+        if(i) put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
+        else  put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
+
+        if(ccp){
+            if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
+            if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
+            if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
+            if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
+        }
+    }
+}
+
+#define MAX_MB_SIZE (30*16*16*3/2/8)
+
+static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
+    int i;
+
+    if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {
+        av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+        return -1;
+    }
+
+    if(a->avctx->codec_id == AV_CODEC_ID_ASV1){
+        for(i=0; i<6; i++)
+            asv1_encode_block(a, block[i]);
+    }else{
+        for(i=0; i<6; i++)
+            asv2_encode_block(a, block[i]);
+    }
+    return 0;
+}
+
+static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
+    DCTELEM (*block)[64]= a->block;
+    int linesize= a->picture.linesize[0];
+    int i;
+
+    uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
+    uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
+    uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
+
+    a->dsp.get_pixels(block[0], ptr_y                 , linesize);
+    a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
+    a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
+    a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
+    for(i=0; i<4; i++)
+        a->dsp.fdct(block[i]);
+
+    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
+        a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
+        a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
+        for(i=4; i<6; i++)
+            a->dsp.fdct(block[i]);
+    }
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                        const AVFrame *pict, int *got_packet)
+{
+    ASV1Context * const a = avctx->priv_data;
+    AVFrame * const p= &a->picture;
+    int size, ret;
+    int mb_x, mb_y;
+
+    if (!pkt->data &&
+        (ret = av_new_packet(pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
+                                  FF_MIN_BUFFER_SIZE)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+        return ret;
+    }
+
+    init_put_bits(&a->pb, pkt->data, pkt->size);
+
+    *p = *pict;
+    p->pict_type= AV_PICTURE_TYPE_I;
+    p->key_frame= 1;
+
+    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
+        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
+            dct_get(a, mb_x, mb_y);
+            encode_mb(a, a->block);
+        }
+    }
+
+    if(a->mb_width2 != a->mb_width){
+        mb_x= a->mb_width2;
+        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
+            dct_get(a, mb_x, mb_y);
+            encode_mb(a, a->block);
+        }
+    }
+
+    if(a->mb_height2 != a->mb_height){
+        mb_y= a->mb_height2;
+        for(mb_x=0; mb_x<a->mb_width; mb_x++){
+            dct_get(a, mb_x, mb_y);
+            encode_mb(a, a->block);
+        }
+    }
+    emms_c();
+
+    avpriv_align_put_bits(&a->pb);
+    while(put_bits_count(&a->pb)&31)
+        put_bits(&a->pb, 8, 0);
+
+    size= put_bits_count(&a->pb)/32;
+
+    if(avctx->codec_id == AV_CODEC_ID_ASV1)
+        a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
+    else{
+        int i;
+        for(i=0; i<4*size; i++)
+            pkt->data[i] = av_reverse[pkt->data[i]];
+    }
+
+    pkt->size   = size*4;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+
+    return 0;
+}
+
+static av_cold int encode_init(AVCodecContext *avctx){
+    ASV1Context * const a = avctx->priv_data;
+    int i;
+    const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
+
+    ff_asv_common_init(avctx);
+
+    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
+
+    a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
+
+    avctx->extradata= av_mallocz(8);
+    avctx->extradata_size=8;
+    ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);
+    ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));
+
+    for(i=0; i<64; i++){
+        int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
+        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
+    }
+
+    return 0;
+}
+
+#if CONFIG_ASV1_ENCODER
+AVCodec ff_asv1_encoder = {
+    .name           = "asv1",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_ASV1,
+    .priv_data_size = sizeof(ASV1Context),
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .pix_fmts       = (const enum PixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
+    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V1"),
+};
+#endif
+
+#if CONFIG_ASV2_ENCODER
+AVCodec ff_asv2_encoder = {
+    .name           = "asv2",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_ASV2,
+    .priv_data_size = sizeof(ASV1Context),
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .pix_fmts       = (const enum PixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
+    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V2"),
+};
+#endif