lavc: split asv12 encoder/decoder

1 files changed, 325 insertions, 0 deletions

diff --git a/libavcodec/asvdec.c b/libavcodec/asvdec.c
new file mode 100644
index 0000000000..ceb8f636a6
--- /dev/null
+++ b/libavcodec/asvdec.c
@@ -0,0 +1,325 @@
+/*
+ * 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 decoder.
+ */
+
+#include "libavutil/common.h"
+#include "libavutil/mem.h"
+
+#include "asv.h"
+#include "avcodec.h"
+#include "put_bits.h"
+#include "dsputil.h"
+#include "mpeg12data.h"
+
+//#undef NDEBUG
+//#include <assert.h>
+
+#define VLC_BITS 6
+#define ASV2_LEVEL_VLC_BITS 10
+
+static VLC ccp_vlc;
+static VLC level_vlc;
+static VLC dc_ccp_vlc;
+static VLC ac_ccp_vlc;
+static VLC asv2_level_vlc;
+
+static av_cold void init_vlcs(ASV1Context *a){
+    static int done = 0;
+
+    if (!done) {
+        done = 1;
+
+        INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
+                 &ff_asv_ccp_tab[0][1], 2, 1,
+                 &ff_asv_ccp_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
+                 &ff_asv_dc_ccp_tab[0][1], 2, 1,
+                 &ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
+                 &ff_asv_ac_ccp_tab[0][1], 2, 1,
+                 &ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,
+                 &ff_asv_level_tab[0][1], 2, 1,
+                 &ff_asv_level_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
+                 &ff_asv2_level_tab[0][1], 2, 1,
+                 &ff_asv2_level_tab[0][0], 2, 1, 1024);
+    }
+}
+
+//FIXME write a reversed bitstream reader to avoid the double reverse
+static inline int asv2_get_bits(GetBitContext *gb, int n){
+    return av_reverse[ get_bits(gb, n) << (8-n) ];
+}
+
+static inline int asv1_get_level(GetBitContext *gb){
+    int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
+
+    if(code==3) return get_sbits(gb, 8);
+    else        return code - 3;
+}
+
+static inline int asv2_get_level(GetBitContext *gb){
+    int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
+
+    if(code==31) return (int8_t)asv2_get_bits(gb, 8);
+    else         return code - 31;
+}
+
+static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
+    int i;
+
+    block[0]= 8*get_bits(&a->gb, 8);
+
+    for(i=0; i<11; i++){
+        const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
+
+        if(ccp){
+            if(ccp == 16) break;
+            if(ccp < 0 || i>=10){
+                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
+                return -1;
+            }
+
+            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
+            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
+            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
+            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
+        }
+    }
+
+    return 0;
+}
+
+static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
+    int i, count, ccp;
+
+    count= asv2_get_bits(&a->gb, 4);
+
+    block[0]= 8*asv2_get_bits(&a->gb, 8);
+
+    ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
+    if(ccp){
+        if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
+        if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
+        if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
+    }
+
+    for(i=1; i<count+1; i++){
+        const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
+
+        if(ccp){
+            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
+            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
+            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
+            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
+        }
+    }
+
+    return 0;
+}
+
+static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
+    int i;
+
+    a->dsp.clear_blocks(block[0]);
+
+    if(a->avctx->codec_id == AV_CODEC_ID_ASV1){
+        for(i=0; i<6; i++){
+            if( asv1_decode_block(a, block[i]) < 0)
+                return -1;
+        }
+    }else{
+        for(i=0; i<6; i++){
+            if( asv2_decode_block(a, block[i]) < 0)
+                return -1;
+        }
+    }
+    return 0;
+}
+
+static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
+    DCTELEM (*block)[64]= a->block;
+    int linesize= a->picture.linesize[0];
+
+    uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
+    uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
+    uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
+
+    a->dsp.idct_put(dest_y                 , linesize, block[0]);
+    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
+    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
+    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
+
+    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
+        a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
+        a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
+    }
+}
+
+static int decode_frame(AVCodecContext *avctx,
+                        void *data, int *data_size,
+                        AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    ASV1Context * const a = avctx->priv_data;
+    AVFrame *picture = data;
+    AVFrame * const p= &a->picture;
+    int mb_x, mb_y;
+
+    if(p->data[0])
+        avctx->release_buffer(avctx, p);
+
+    p->reference= 0;
+    if(avctx->get_buffer(avctx, p) < 0){
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return -1;
+    }
+    p->pict_type= AV_PICTURE_TYPE_I;
+    p->key_frame= 1;
+
+    av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
+                          buf_size);
+    if (!a->bitstream_buffer)
+        return AVERROR(ENOMEM);
+
+    if(avctx->codec_id == AV_CODEC_ID_ASV1)
+        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
+    else{
+        int i;
+        for(i=0; i<buf_size; i++)
+            a->bitstream_buffer[i]= av_reverse[ buf[i] ];
+    }
+
+    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
+
+    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
+        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
+            if( decode_mb(a, a->block) <0)
+                return -1;
+
+            idct_put(a, mb_x, mb_y);
+        }
+    }
+
+    if(a->mb_width2 != a->mb_width){
+        mb_x= a->mb_width2;
+        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
+            if( decode_mb(a, a->block) <0)
+                return -1;
+
+            idct_put(a, mb_x, mb_y);
+        }
+    }
+
+    if(a->mb_height2 != a->mb_height){
+        mb_y= a->mb_height2;
+        for(mb_x=0; mb_x<a->mb_width; mb_x++){
+            if( decode_mb(a, a->block) <0)
+                return -1;
+
+            idct_put(a, mb_x, mb_y);
+        }
+    }
+
+    *picture   = a->picture;
+    *data_size = sizeof(AVPicture);
+
+    emms_c();
+
+    return (get_bits_count(&a->gb)+31)/32*4;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx){
+    ASV1Context * const a = avctx->priv_data;
+    AVFrame *p= &a->picture;
+    int i;
+    const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
+
+    ff_asv_common_init(avctx);
+    init_vlcs(a);
+    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_asv_scantab);
+    avctx->pix_fmt= AV_PIX_FMT_YUV420P;
+
+    a->inv_qscale= avctx->extradata[0];
+    if(a->inv_qscale == 0){
+        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
+        if(avctx->codec_id == AV_CODEC_ID_ASV1)
+            a->inv_qscale= 6;
+        else
+            a->inv_qscale= 10;
+    }
+
+    for(i=0; i<64; i++){
+        int index = ff_asv_scantab[i];
+
+        a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
+    }
+
+    p->qstride= a->mb_width;
+    p->qscale_table= av_malloc( p->qstride * a->mb_height);
+    p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
+    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
+
+    return 0;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx){
+    ASV1Context * const a = avctx->priv_data;
+
+    av_freep(&a->bitstream_buffer);
+    av_freep(&a->picture.qscale_table);
+    a->bitstream_buffer_size=0;
+
+    if(a->picture.data[0])
+        avctx->release_buffer(avctx, &a->picture);
+
+    return 0;
+}
+
+AVCodec ff_asv1_decoder = {
+    .name           = "asv1",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_ASV1,
+    .priv_data_size = sizeof(ASV1Context),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V1"),
+};
+
+AVCodec ff_asv2_decoder = {
+    .name           = "asv2",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_ASV2,
+    .priv_data_size = sizeof(ASV1Context),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V2"),
+};
+