ASV1 codec

with postprocessing support :)

Originally committed as revision 1891 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 454 insertions, 0 deletions

diff --git a/libavcodec/asv1.c b/libavcodec/asv1.c
new file mode 100644
index 0000000000..f17a0e6a1b
--- /dev/null
+++ b/libavcodec/asv1.c
@@ -0,0 +1,454 @@
+/*
+ * ASUS V1 codec
+ * Copyright (c) 2003 Michael Niedermayer
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+ 
+/**
+ * @file asv1.c
+ * ASUS V1 codec.
+ */
+ 
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+
+//#undef NDEBUG
+//#include <assert.h>
+
+#define VLC_BITS 5
+
+typedef struct ASV1Context{
+    AVCodecContext *avctx;
+    DSPContext dsp;
+    AVFrame picture;
+    PutBitContext pb;
+    GetBitContext gb;
+    ScanTable scantable;
+    int inv_qscale;
+    int mb_width;
+    int mb_height;
+    int mb_width2;
+    int mb_height2;
+    DCTELEM __align8 block[6][64];
+    uint16_t __align8 intra_matrix[64];
+    int __align8 q_intra_matrix[64];
+    uint8_t *bitstream_buffer;
+    int bitstream_buffer_size;
+} ASV1Context;
+
+static const uint8_t scantab[64]={
+    0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
+    0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
+    0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
+    0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
+    0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
+};
+
+static const uint8_t ccp_tab[17][2]={
+    {0x2,2}, {0xE,5}, {0xD,5}, {0xC,5},
+    {0xB,5}, {0xA,5}, {0x9,5}, {0x8,5},
+    {0x7,5}, {0x6,5}, {0x5,5}, {0x4,5},
+    {0x3,5}, {0x2,5}, {0x1,5}, {0x3,2},
+    {0xF,5}, //EOB
+};
+
+static const uint8_t level_tab[7][2]={
+    {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
+};
+
+static VLC ccp_vlc;
+static VLC level_vlc;
+
+static void init_vlcs(ASV1Context *a){
+    static int done = 0;
+
+    if (!done) {
+        done = 1;
+
+        init_vlc(&ccp_vlc, VLC_BITS, 17, 
+                 &ccp_tab[0][1], 2, 1,
+                 &ccp_tab[0][0], 2, 1);
+        init_vlc(&level_vlc,  VLC_BITS, 7, 
+                 &level_tab[0][1], 2, 1,
+                 &level_tab[0][0], 2, 1);
+    }
+}
+
+static inline int 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 void put_level(PutBitContext *pb, int level){
+    unsigned int index= level + 3;
+
+    if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
+    else{
+        put_bits(pb, level_tab[3][1], level_tab[3][0]);
+        put_bits(pb, 8, level&0xFF);
+    }
+}
+
+static inline int 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){
+                printf("coded coeff pattern damaged\n");
+                return -1;
+            }
+
+            if(ccp&1) block[a->scantable.permutated[4*i+0]]= (get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
+            if(ccp&2) block[a->scantable.permutated[4*i+1]]= (get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;;
+            if(ccp&4) block[a->scantable.permutated[4*i+2]]= (get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;;
+            if(ccp&8) block[a->scantable.permutated[4*i+3]]= (get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;;
+        }
+    }
+
+    return 0;
+}
+
+static inline void 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= scantab[4*i];
+        int ccp=0;
+
+        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 1;
+        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 2;
+        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 4;
+        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 8;
+
+        if(ccp){
+            for(;nc_count; nc_count--) 
+                put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
+
+            put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
+            
+            if(ccp&1) put_level(&a->pb, block[index + 0]);
+            if(ccp&2) put_level(&a->pb, block[index + 8]);
+            if(ccp&4) put_level(&a->pb, block[index + 1]);
+            if(ccp&8) put_level(&a->pb, block[index + 9]);
+        }else{
+            nc_count++;
+        }
+    }
+    put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
+}
+
+static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
+    int i;
+
+    a->dsp.clear_blocks(block[0]);
+    
+    for(i=0; i<6; i++){
+        if( decode_block(a, block[i]) < 0) 
+            return -1;
+    }
+    return 0;
+}
+
+static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){
+    int i;
+
+    for(i=0; i<6; i++){
+        encode_block(a, block[i]);
+    }
+}
+        
+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 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 decode_frame(AVCodecContext *avctx, 
+                        void *data, int *data_size,
+                        uint8_t *buf, int buf_size)
+{
+    ASV1Context * const a = avctx->priv_data;
+    AVFrame *picture = data;
+    AVFrame * const p= (AVFrame*)&a->picture;
+    int mb_x, mb_y;
+
+    *data_size = 0;
+
+    /* special case for last picture */
+    if (buf_size == 0) {
+        return 0;
+    }
+
+    if(p->data[0])
+        avctx->release_buffer(avctx, p);
+
+    p->reference= 0;
+    if(avctx->get_buffer(avctx, p) < 0){
+        fprintf(stderr, "get_buffer() failed\n");
+        return -1;
+    }
+    p->pict_type= I_TYPE;
+    p->key_frame= 1;
+
+    a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+    a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
+    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);
+        }
+    }
+#if 0    
+int i;
+printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
+for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
+    printf("%d", get_bits1(&a->gb));
+}
+
+for(i=0; i<s->avctx->extradata_size; i++){
+    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
+}
+#endif
+
+    p->quality= (32 + a->inv_qscale/2)/a->inv_qscale;
+    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
+    
+    *picture= *(AVFrame*)&a->picture;
+    *data_size = sizeof(AVPicture);
+
+    emms_c();
+    
+    return (get_bits_count(&a->gb)+31)/32*4;
+}
+
+static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+    ASV1Context * const a = avctx->priv_data;
+    AVFrame *pict = data;
+    AVFrame * const p= (AVFrame*)&a->picture;
+    int size;
+    int mb_x, mb_y;
+
+    init_put_bits(&a->pb, buf, buf_size, NULL, NULL);
+    
+    *p = *pict;
+    p->pict_type= I_TYPE;
+    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();
+    
+    align_put_bits(&a->pb);
+    while(get_bit_count(&a->pb)&31)
+        put_bits(&a->pb, 8, 0);
+    
+    size= get_bit_count(&a->pb)/32;
+    
+    a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
+    
+    return size*4;
+}
+
+static void common_init(AVCodecContext *avctx){
+    ASV1Context * const a = avctx->priv_data;
+
+    dsputil_init(&a->dsp, avctx);
+
+    a->mb_width   = (avctx->width  + 15) / 16;
+    a->mb_height  = (avctx->height + 15) / 16;
+    a->mb_width2  = (avctx->width  + 0) / 16;
+    a->mb_height2 = (avctx->height + 0) / 16;
+
+    avctx->coded_frame= (AVFrame*)&a->picture;
+    a->avctx= avctx;
+}
+
+static int decode_init(AVCodecContext *avctx){
+    ASV1Context * const a = avctx->priv_data;
+    AVFrame *p= (AVFrame*)&a->picture;
+    int i;
+ 
+    common_init(avctx);
+    init_vlcs(a);
+    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
+
+    a->inv_qscale= le2me_32(((uint32_t*)avctx->extradata)[0]);
+    if(a->inv_qscale == 0){
+        printf("illegal qscale 0\n");
+        a->inv_qscale= 6;
+    }
+
+    for(i=0; i<64; i++){
+        int index= scantab[i];
+        a->intra_matrix[i]= 64*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
+    }
+
+    p->qstride= a->mb_width;
+    p->qscale_table= av_mallocz( p->qstride * a->mb_height);
+
+    return 0;
+}
+
+static int encode_init(AVCodecContext *avctx){
+    ASV1Context * const a = avctx->priv_data;
+    int i;
+ 
+    common_init(avctx);
+    
+    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
+
+    a->inv_qscale= (32*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
+    
+    avctx->extradata= av_mallocz(8);
+    avctx->extradata_size=8;
+    ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
+    ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));
+    
+    for(i=0; i<64; i++){
+        int q= 32*ff_mpeg1_default_intra_matrix[i];
+        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
+    }
+
+    return 0;
+}
+
+static 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;
+    
+    avcodec_default_free_buffers(avctx);
+
+    return 0;
+}
+
+AVCodec asv1_decoder = {
+    "asv1",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_ASV1,
+    sizeof(ASV1Context),
+    decode_init,
+    NULL,
+    decode_end,
+    decode_frame,
+    CODEC_CAP_DR1,
+};
+
+AVCodec asv1_encoder = {
+    "asv1",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_ASV1,
+    sizeof(ASV1Context),
+    encode_init,
+    encode_frame,
+    //encode_end,
+};