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1
/*
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 * ASUS V1/V2 codec
3
 * Copyright (c) 2003 Michael Niedermayer
4
 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/**
23
 * @file libavcodec/asv1.c
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 * ASUS V1/V2 codec.
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 */
26

    
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#include "avcodec.h"
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#include "libavutil/common.h"
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#include "put_bits.h"
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#include "dsputil.h"
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#include "mpeg12data.h"
32

    
33
//#undef NDEBUG
34
//#include <assert.h>
35

    
36
#define VLC_BITS 6
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#define ASV2_LEVEL_VLC_BITS 10
38

    
39
typedef struct ASV1Context{
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    AVCodecContext *avctx;
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    DSPContext dsp;
42
    AVFrame picture;
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    PutBitContext pb;
44
    GetBitContext gb;
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    ScanTable scantable;
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    int inv_qscale;
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    int mb_width;
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    int mb_height;
49
    int mb_width2;
50
    int mb_height2;
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    DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
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    uint16_t intra_matrix[64];
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    int q_intra_matrix[64];
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    uint8_t *bitstream_buffer;
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    unsigned int bitstream_buffer_size;
56
} ASV1Context;
57

    
58
static const uint8_t scantab[64]={
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    0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
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    0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
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    0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
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    0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
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    0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
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    0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
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    0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
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    0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
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};
68

    
69

    
70
static const uint8_t ccp_tab[17][2]={
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    {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
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    {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
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    {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
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    {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
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    {0xF,5}, //EOB
76
};
77

    
78
static const uint8_t level_tab[7][2]={
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    {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
80
};
81

    
82
static const uint8_t dc_ccp_tab[8][2]={
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    {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
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    {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
85
};
86

    
87
static const uint8_t ac_ccp_tab[16][2]={
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    {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
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    {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
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    {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
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    {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
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};
93

    
94
static const uint8_t asv2_level_tab[63][2]={
95
    {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
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    {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
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    {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
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    {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
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    {0x07, 4},{0x05, 4},
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    {0x03, 2},
101
    {0x00, 5},
102
    {0x02, 2},
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    {0x04, 4},{0x06, 4},
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    {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
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    {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
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    {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
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    {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
108
};
109

    
110

    
111
static VLC ccp_vlc;
112
static VLC level_vlc;
113
static VLC dc_ccp_vlc;
114
static VLC ac_ccp_vlc;
115
static VLC asv2_level_vlc;
116

    
117
static av_cold void init_vlcs(ASV1Context *a){
118
    static int done = 0;
119

    
120
    if (!done) {
121
        done = 1;
122

    
123
        INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
124
                 &ccp_tab[0][1], 2, 1,
125
                 &ccp_tab[0][0], 2, 1, 64);
126
        INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
127
                 &dc_ccp_tab[0][1], 2, 1,
128
                 &dc_ccp_tab[0][0], 2, 1, 64);
129
        INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
130
                 &ac_ccp_tab[0][1], 2, 1,
131
                 &ac_ccp_tab[0][0], 2, 1, 64);
132
        INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,
133
                 &level_tab[0][1], 2, 1,
134
                 &level_tab[0][0], 2, 1, 64);
135
        INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
136
                 &asv2_level_tab[0][1], 2, 1,
137
                 &asv2_level_tab[0][0], 2, 1, 1024);
138
    }
139
}
140

    
141
//FIXME write a reversed bitstream reader to avoid the double reverse
142
static inline int asv2_get_bits(GetBitContext *gb, int n){
143
    return av_reverse[ get_bits(gb, n) << (8-n) ];
144
}
145

    
146
static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
147
    put_bits(pb, n, av_reverse[ v << (8-n) ]);
148
}
149

    
150
static inline int asv1_get_level(GetBitContext *gb){
151
    int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
152

    
153
    if(code==3) return get_sbits(gb, 8);
154
    else        return code - 3;
155
}
156

    
157
static inline int asv2_get_level(GetBitContext *gb){
158
    int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
159

    
160
    if(code==31) return (int8_t)asv2_get_bits(gb, 8);
161
    else         return code - 31;
162
}
163

    
164
static inline void asv1_put_level(PutBitContext *pb, int level){
165
    unsigned int index= level + 3;
166

    
167
    if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
168
    else{
169
        put_bits(pb, level_tab[3][1], level_tab[3][0]);
170
        put_sbits(pb, 8, level);
171
    }
172
}
173

    
174
static inline void asv2_put_level(PutBitContext *pb, int level){
175
    unsigned int index= level + 31;
176

    
177
    if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
178
    else{
179
        put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
180
        asv2_put_bits(pb, 8, level&0xFF);
181
    }
182
}
183

    
184
static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
185
    int i;
186

    
187
    block[0]= 8*get_bits(&a->gb, 8);
188

    
189
    for(i=0; i<11; i++){
190
        const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
191

    
192
        if(ccp){
193
            if(ccp == 16) break;
194
            if(ccp < 0 || i>=10){
195
                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
196
                return -1;
197
            }
198

    
199
            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
200
            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
201
            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
202
            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
203
        }
204
    }
205

    
206
    return 0;
207
}
208

    
209
static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
210
    int i, count, ccp;
211

    
212
    count= asv2_get_bits(&a->gb, 4);
213

    
214
    block[0]= 8*asv2_get_bits(&a->gb, 8);
215

    
216
    ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
217
    if(ccp){
218
        if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
219
        if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
220
        if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
221
    }
222

    
223
    for(i=1; i<count+1; i++){
224
        const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
225

    
226
        if(ccp){
227
            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
228
            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
229
            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
230
            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
231
        }
232
    }
233

    
234
    return 0;
235
}
236

    
237
static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
238
    int i;
239
    int nc_count=0;
240

    
241
    put_bits(&a->pb, 8, (block[0] + 32)>>6);
242
    block[0]= 0;
243

    
244
    for(i=0; i<10; i++){
245
        const int index= scantab[4*i];
246
        int ccp=0;
247

    
248
        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
249
        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
250
        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
251
        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
252

    
253
        if(ccp){
254
            for(;nc_count; nc_count--)
255
                put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
256

    
257
            put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
258

    
259
            if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
260
            if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
261
            if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
262
            if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
263
        }else{
264
            nc_count++;
265
        }
266
    }
267
    put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
268
}
269

    
270
static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
271
    int i;
272
    int count=0;
273

    
274
    for(count=63; count>3; count--){
275
        const int index= scantab[count];
276

    
277
        if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
278
            break;
279
    }
280

    
281
    count >>= 2;
282

    
283
    asv2_put_bits(&a->pb, 4, count);
284
    asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
285
    block[0]= 0;
286

    
287
    for(i=0; i<=count; i++){
288
        const int index= scantab[4*i];
289
        int ccp=0;
290

    
291
        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
292
        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
293
        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
294
        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
295

    
296
        assert(i || ccp<8);
297
        if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
298
        else  put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
299

    
300
        if(ccp){
301
            if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
302
            if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
303
            if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
304
            if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
305
        }
306
    }
307
}
308

    
309
static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
310
    int i;
311

    
312
    a->dsp.clear_blocks(block[0]);
313

    
314
    if(a->avctx->codec_id == CODEC_ID_ASV1){
315
        for(i=0; i<6; i++){
316
            if( asv1_decode_block(a, block[i]) < 0)
317
                return -1;
318
        }
319
    }else{
320
        for(i=0; i<6; i++){
321
            if( asv2_decode_block(a, block[i]) < 0)
322
                return -1;
323
        }
324
    }
325
    return 0;
326
}
327

    
328
static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
329
    int i;
330

    
331
    if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
332
        av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
333
        return -1;
334
    }
335

    
336
    if(a->avctx->codec_id == CODEC_ID_ASV1){
337
        for(i=0; i<6; i++)
338
            asv1_encode_block(a, block[i]);
339
    }else{
340
        for(i=0; i<6; i++)
341
            asv2_encode_block(a, block[i]);
342
    }
343
    return 0;
344
}
345

    
346
static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
347
    DCTELEM (*block)[64]= a->block;
348
    int linesize= a->picture.linesize[0];
349

    
350
    uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
351
    uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
352
    uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
353

    
354
    a->dsp.idct_put(dest_y                 , linesize, block[0]);
355
    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
356
    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
357
    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
358

    
359
    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
360
        a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
361
        a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
362
    }
363
}
364

    
365
static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
366
    DCTELEM (*block)[64]= a->block;
367
    int linesize= a->picture.linesize[0];
368
    int i;
369

    
370
    uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
371
    uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
372
    uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
373

    
374
    a->dsp.get_pixels(block[0], ptr_y                 , linesize);
375
    a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
376
    a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
377
    a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
378
    for(i=0; i<4; i++)
379
        a->dsp.fdct(block[i]);
380

    
381
    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
382
        a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
383
        a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
384
        for(i=4; i<6; i++)
385
            a->dsp.fdct(block[i]);
386
    }
387
}
388

    
389
static int decode_frame(AVCodecContext *avctx,
390
                        void *data, int *data_size,
391
                        AVPacket *avpkt)
392
{
393
    const uint8_t *buf = avpkt->data;
394
    int buf_size = avpkt->size;
395
    ASV1Context * const a = avctx->priv_data;
396
    AVFrame *picture = data;
397
    AVFrame * const p= &a->picture;
398
    int mb_x, mb_y;
399

    
400
    if(p->data[0])
401
        avctx->release_buffer(avctx, p);
402

    
403
    p->reference= 0;
404
    if(avctx->get_buffer(avctx, p) < 0){
405
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
406
        return -1;
407
    }
408
    p->pict_type= FF_I_TYPE;
409
    p->key_frame= 1;
410

    
411
    av_fast_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
412
    if (!a->bitstream_buffer)
413
        return AVERROR(ENOMEM);
414

    
415
    if(avctx->codec_id == CODEC_ID_ASV1)
416
        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
417
    else{
418
        int i;
419
        for(i=0; i<buf_size; i++)
420
            a->bitstream_buffer[i]= av_reverse[ buf[i] ];
421
    }
422

    
423
    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
424

    
425
    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
426
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
427
            if( decode_mb(a, a->block) <0)
428
                return -1;
429

    
430
            idct_put(a, mb_x, mb_y);
431
        }
432
    }
433

    
434
    if(a->mb_width2 != a->mb_width){
435
        mb_x= a->mb_width2;
436
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
437
            if( decode_mb(a, a->block) <0)
438
                return -1;
439

    
440
            idct_put(a, mb_x, mb_y);
441
        }
442
    }
443

    
444
    if(a->mb_height2 != a->mb_height){
445
        mb_y= a->mb_height2;
446
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
447
            if( decode_mb(a, a->block) <0)
448
                return -1;
449

    
450
            idct_put(a, mb_x, mb_y);
451
        }
452
    }
453
#if 0
454
int i;
455
printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
456
for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
457
    printf("%d", get_bits1(&a->gb));
458
}
459

460
for(i=0; i<s->avctx->extradata_size; i++){
461
    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
462
}
463
#endif
464

    
465
    *picture= *(AVFrame*)&a->picture;
466
    *data_size = sizeof(AVPicture);
467

    
468
    emms_c();
469

    
470
    return (get_bits_count(&a->gb)+31)/32*4;
471
}
472

    
473
#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
474
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
475
    ASV1Context * const a = avctx->priv_data;
476
    AVFrame *pict = data;
477
    AVFrame * const p= &a->picture;
478
    int size;
479
    int mb_x, mb_y;
480

    
481
    init_put_bits(&a->pb, buf, buf_size);
482

    
483
    *p = *pict;
484
    p->pict_type= FF_I_TYPE;
485
    p->key_frame= 1;
486

    
487
    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
488
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
489
            dct_get(a, mb_x, mb_y);
490
            encode_mb(a, a->block);
491
        }
492
    }
493

    
494
    if(a->mb_width2 != a->mb_width){
495
        mb_x= a->mb_width2;
496
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
497
            dct_get(a, mb_x, mb_y);
498
            encode_mb(a, a->block);
499
        }
500
    }
501

    
502
    if(a->mb_height2 != a->mb_height){
503
        mb_y= a->mb_height2;
504
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
505
            dct_get(a, mb_x, mb_y);
506
            encode_mb(a, a->block);
507
        }
508
    }
509
    emms_c();
510

    
511
    align_put_bits(&a->pb);
512
    while(put_bits_count(&a->pb)&31)
513
        put_bits(&a->pb, 8, 0);
514

    
515
    size= put_bits_count(&a->pb)/32;
516

    
517
    if(avctx->codec_id == CODEC_ID_ASV1)
518
        a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
519
    else{
520
        int i;
521
        for(i=0; i<4*size; i++)
522
            buf[i]= av_reverse[ buf[i] ];
523
    }
524

    
525
    return size*4;
526
}
527
#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
528

    
529
static av_cold void common_init(AVCodecContext *avctx){
530
    ASV1Context * const a = avctx->priv_data;
531

    
532
    dsputil_init(&a->dsp, avctx);
533

    
534
    a->mb_width   = (avctx->width  + 15) / 16;
535
    a->mb_height  = (avctx->height + 15) / 16;
536
    a->mb_width2  = (avctx->width  + 0) / 16;
537
    a->mb_height2 = (avctx->height + 0) / 16;
538

    
539
    avctx->coded_frame= &a->picture;
540
    a->avctx= avctx;
541
}
542

    
543
static av_cold int decode_init(AVCodecContext *avctx){
544
    ASV1Context * const a = avctx->priv_data;
545
    AVFrame *p= &a->picture;
546
    int i;
547
    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
548

    
549
    common_init(avctx);
550
    init_vlcs(a);
551
    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
552
    avctx->pix_fmt= PIX_FMT_YUV420P;
553

    
554
    a->inv_qscale= avctx->extradata[0];
555
    if(a->inv_qscale == 0){
556
        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
557
        if(avctx->codec_id == CODEC_ID_ASV1)
558
            a->inv_qscale= 6;
559
        else
560
            a->inv_qscale= 10;
561
    }
562

    
563
    for(i=0; i<64; i++){
564
        int index= scantab[i];
565

    
566
        a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
567
    }
568

    
569
    p->qstride= a->mb_width;
570
    p->qscale_table= av_malloc( p->qstride * a->mb_height);
571
    p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
572
    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
573

    
574
    return 0;
575
}
576

    
577
#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
578
static av_cold int encode_init(AVCodecContext *avctx){
579
    ASV1Context * const a = avctx->priv_data;
580
    int i;
581
    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
582

    
583
    common_init(avctx);
584

    
585
    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
586

    
587
    a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
588

    
589
    avctx->extradata= av_mallocz(8);
590
    avctx->extradata_size=8;
591
    ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
592
    ((uint32_t*)avctx->extradata)[1]= le2me_32(AV_RL32("ASUS"));
593

    
594
    for(i=0; i<64; i++){
595
        int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
596
        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
597
    }
598

    
599
    return 0;
600
}
601
#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
602

    
603
static av_cold int decode_end(AVCodecContext *avctx){
604
    ASV1Context * const a = avctx->priv_data;
605

    
606
    av_freep(&a->bitstream_buffer);
607
    av_freep(&a->picture.qscale_table);
608
    a->bitstream_buffer_size=0;
609

    
610
    if(a->picture.data[0])
611
        avctx->release_buffer(avctx, &a->picture);
612

    
613
    return 0;
614
}
615

    
616
AVCodec asv1_decoder = {
617
    "asv1",
618
    CODEC_TYPE_VIDEO,
619
    CODEC_ID_ASV1,
620
    sizeof(ASV1Context),
621
    decode_init,
622
    NULL,
623
    decode_end,
624
    decode_frame,
625
    CODEC_CAP_DR1,
626
    .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
627
};
628

    
629
AVCodec asv2_decoder = {
630
    "asv2",
631
    CODEC_TYPE_VIDEO,
632
    CODEC_ID_ASV2,
633
    sizeof(ASV1Context),
634
    decode_init,
635
    NULL,
636
    decode_end,
637
    decode_frame,
638
    CODEC_CAP_DR1,
639
    .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
640
};
641

    
642
#if CONFIG_ASV1_ENCODER
643
AVCodec asv1_encoder = {
644
    "asv1",
645
    CODEC_TYPE_VIDEO,
646
    CODEC_ID_ASV1,
647
    sizeof(ASV1Context),
648
    encode_init,
649
    encode_frame,
650
    //encode_end,
651
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
652
    .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
653
};
654
#endif
655

    
656
#if CONFIG_ASV2_ENCODER
657
AVCodec asv2_encoder = {
658
    "asv2",
659
    CODEC_TYPE_VIDEO,
660
    CODEC_ID_ASV2,
661
    sizeof(ASV1Context),
662
    encode_init,
663
    encode_frame,
664
    //encode_end,
665
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
666
    .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
667
};
668
#endif