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1
/*
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 * ASUS V1/V2 codec
3
 * Copyright (c) 2003 Michael Niedermayer
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 *
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 * This library is free software; you can redistribute it and/or
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 * 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 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * 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 this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
19
 
20
/**
21
 * @file asv1.c
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 * ASUS V1/V2 codec.
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 */
24
 
25
#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
28

    
29
//#undef NDEBUG
30
//#include <assert.h>
31

    
32
#define VLC_BITS 6
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#define ASV2_LEVEL_VLC_BITS 10
34
 
35
typedef struct ASV1Context{
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    AVCodecContext *avctx;
37
    DSPContext dsp;
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    AVFrame picture;
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    PutBitContext pb;
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    GetBitContext gb;
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    ScanTable scantable;
42
    int inv_qscale;
43
    int mb_width;
44
    int mb_height;
45
    int mb_width2;
46
    int mb_height2;
47
    DCTELEM __align8 block[6][64];
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    uint16_t __align8 intra_matrix[64];
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    int __align8 q_intra_matrix[64];
50
    uint8_t *bitstream_buffer;
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    int bitstream_buffer_size;
52
} ASV1Context;
53

    
54
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,
63
};
64

    
65

    
66
static const uint8_t reverse[256]={
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0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
68
0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
69
0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
70
0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
71
0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
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0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
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0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
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0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
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0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
76
0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
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0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
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0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
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0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
80
0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
81
0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
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0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
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};
84

    
85
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}, 
89
    {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
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    {0xF,5}, //EOB
91
};
92

    
93
static const uint8_t level_tab[7][2]={
94
    {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
95
};
96

    
97
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},
100
};
101

    
102
static const uint8_t ac_ccp_tab[16][2]={
103
    {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},
106
    {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
107
};
108

    
109
static const uint8_t asv2_level_tab[63][2]={
110
    {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
111
    {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},
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    {0x00, 5},
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    {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},
123
};
124

    
125

    
126
static VLC ccp_vlc;
127
static VLC level_vlc;
128
static VLC dc_ccp_vlc;
129
static VLC ac_ccp_vlc;
130
static VLC asv2_level_vlc;
131

    
132
static void init_vlcs(ASV1Context *a){
133
    static int done = 0;
134

    
135
    if (!done) {
136
        done = 1;
137

    
138
        init_vlc(&ccp_vlc, VLC_BITS, 17, 
139
                 &ccp_tab[0][1], 2, 1,
140
                 &ccp_tab[0][0], 2, 1);
141
        init_vlc(&dc_ccp_vlc, VLC_BITS, 8, 
142
                 &dc_ccp_tab[0][1], 2, 1,
143
                 &dc_ccp_tab[0][0], 2, 1);
144
        init_vlc(&ac_ccp_vlc, VLC_BITS, 16, 
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                 &ac_ccp_tab[0][1], 2, 1,
146
                 &ac_ccp_tab[0][0], 2, 1);
147
        init_vlc(&level_vlc,  VLC_BITS, 7, 
148
                 &level_tab[0][1], 2, 1,
149
                 &level_tab[0][0], 2, 1);
150
        init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, 
151
                 &asv2_level_tab[0][1], 2, 1,
152
                 &asv2_level_tab[0][0], 2, 1);
153
    }
154
}
155

    
156
//FIXME write a reversed bitstream reader to avoid the double reverse
157
static inline int asv2_get_bits(GetBitContext *gb, int n){
158
    return reverse[ get_bits(gb, n) << (8-n) ];
159
}
160

    
161
static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
162
    put_bits(pb, n, reverse[ v << (8-n) ]);
163
}
164

    
165
static inline int asv1_get_level(GetBitContext *gb){
166
    int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
167

    
168
    if(code==3) return get_sbits(gb, 8);
169
    else        return code - 3;
170
}
171

    
172
static inline int asv2_get_level(GetBitContext *gb){
173
    int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
174

    
175
    if(code==31) return (int8_t)asv2_get_bits(gb, 8);
176
    else         return code - 31;
177
}
178

    
179
static inline void asv1_put_level(PutBitContext *pb, int level){
180
    unsigned int index= level + 3;
181

    
182
    if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
183
    else{
184
        put_bits(pb, level_tab[3][1], level_tab[3][0]);
185
        put_bits(pb, 8, level&0xFF);
186
    }
187
}
188

    
189
static inline void asv2_put_level(PutBitContext *pb, int level){
190
    unsigned int index= level + 31;
191

    
192
    if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
193
    else{
194
        put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
195
        asv2_put_bits(pb, 8, level&0xFF);
196
    }
197
}
198

    
199
static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
200
    int i;
201

    
202
    block[0]= 8*get_bits(&a->gb, 8);
203
    
204
    for(i=0; i<11; i++){
205
        const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
206

    
207
        if(ccp){
208
            if(ccp == 16) break;
209
            if(ccp < 0 || i>=10){
210
                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
211
                return -1;
212
            }
213

    
214
            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
215
            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
216
            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
217
            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
218
        }
219
    }
220

    
221
    return 0;
222
}
223

    
224
static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
225
    int i, count, ccp;
226

    
227
    count= asv2_get_bits(&a->gb, 4);
228
    
229
    block[0]= 8*asv2_get_bits(&a->gb, 8);
230
    
231
    ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
232
    if(ccp){
233
        if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
234
        if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
235
        if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
236
    }
237

    
238
    for(i=1; i<count+1; i++){
239
        const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
240

    
241
        if(ccp){
242
            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
243
            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
244
            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
245
            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
246
        }
247
    }
248
    
249
    return 0;
250
}
251

    
252
static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
253
    int i;
254
    int nc_count=0;
255
    
256
    put_bits(&a->pb, 8, (block[0] + 32)>>6);
257
    block[0]= 0;
258
    
259
    for(i=0; i<10; i++){
260
        const int index= scantab[4*i];
261
        int ccp=0;
262

    
263
        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
264
        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
265
        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
266
        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
267

    
268
        if(ccp){
269
            for(;nc_count; nc_count--) 
270
                put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
271

    
272
            put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
273
            
274
            if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
275
            if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
276
            if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
277
            if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
278
        }else{
279
            nc_count++;
280
        }
281
    }
282
    put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
283
}
284

    
285
static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
286
    int i;
287
    int count=0;
288
    
289
    for(count=63; count>3; count--){
290
        const int index= scantab[count];
291

    
292
        if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 ) 
293
            break;
294
    }
295
    
296
    count >>= 2;
297

    
298
    asv2_put_bits(&a->pb, 4, count);
299
    asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
300
    block[0]= 0;
301
    
302
    for(i=0; i<=count; i++){
303
        const int index= scantab[4*i];
304
        int ccp=0;
305

    
306
        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
307
        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
308
        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
309
        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
310

    
311
        if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
312
        else  put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
313

    
314
        if(ccp){
315
            if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
316
            if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
317
            if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
318
            if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
319
        }
320
    }
321
}
322

    
323
static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
324
    int i;
325

    
326
    a->dsp.clear_blocks(block[0]);
327
    
328
    if(a->avctx->codec_id == CODEC_ID_ASV1){
329
        for(i=0; i<6; i++){
330
            if( asv1_decode_block(a, block[i]) < 0) 
331
                return -1;
332
        }
333
    }else{
334
        for(i=0; i<6; i++){
335
            if( asv2_decode_block(a, block[i]) < 0) 
336
                return -1;
337
        }
338
    }
339
    return 0;
340
}
341

    
342
static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){
343
    int i;
344

    
345
    if(a->avctx->codec_id == CODEC_ID_ASV1){
346
        for(i=0; i<6; i++)
347
            asv1_encode_block(a, block[i]);
348
    }else{
349
        for(i=0; i<6; i++)
350
            asv2_encode_block(a, block[i]);
351
    }
352
}
353

    
354
static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
355
    DCTELEM (*block)[64]= a->block;
356
    int linesize= a->picture.linesize[0];
357
    
358
    uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
359
    uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
360
    uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
361

    
362
    a->dsp.idct_put(dest_y                 , linesize, block[0]);
363
    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
364
    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
365
    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
366

    
367
    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
368
        a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
369
        a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
370
    }
371
}
372

    
373
static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
374
    DCTELEM (*block)[64]= a->block;
375
    int linesize= a->picture.linesize[0];
376
    int i;
377
    
378
    uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
379
    uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
380
    uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
381

    
382
    a->dsp.get_pixels(block[0], ptr_y                 , linesize);
383
    a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
384
    a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
385
    a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
386
    for(i=0; i<4; i++)
387
        a->dsp.fdct(block[i]);
388
    
389
    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
390
        a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
391
        a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
392
        for(i=4; i<6; i++)
393
            a->dsp.fdct(block[i]);
394
    }
395
}
396

    
397
static int decode_frame(AVCodecContext *avctx, 
398
                        void *data, int *data_size,
399
                        uint8_t *buf, int buf_size)
400
{
401
    ASV1Context * const a = avctx->priv_data;
402
    AVFrame *picture = data;
403
    AVFrame * const p= (AVFrame*)&a->picture;
404
    int mb_x, mb_y;
405

    
406
    *data_size = 0;
407

    
408
    /* special case for last picture */
409
    if (buf_size == 0) {
410
        return 0;
411
    }
412

    
413
    if(p->data[0])
414
        avctx->release_buffer(avctx, p);
415

    
416
    p->reference= 0;
417
    if(avctx->get_buffer(avctx, p) < 0){
418
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
419
        return -1;
420
    }
421
    p->pict_type= I_TYPE;
422
    p->key_frame= 1;
423

    
424
    a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
425
    
426
    if(avctx->codec_id == CODEC_ID_ASV1)
427
        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
428
    else{
429
        int i;
430
        for(i=0; i<buf_size; i++)
431
            a->bitstream_buffer[i]= reverse[ buf[i] ];
432
    }
433

    
434
    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
435

    
436
    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
437
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
438
            if( decode_mb(a, a->block) <0)
439
                return -1;
440
             
441
            idct_put(a, mb_x, mb_y);
442
        }
443
    }
444

    
445
    if(a->mb_width2 != a->mb_width){
446
        mb_x= a->mb_width2;
447
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
448
            if( decode_mb(a, a->block) <0)
449
                return -1;
450
             
451
            idct_put(a, mb_x, mb_y);
452
        }
453
    }
454

    
455
    if(a->mb_height2 != a->mb_height){
456
        mb_y= a->mb_height2;
457
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
458
            if( decode_mb(a, a->block) <0)
459
                return -1;
460
             
461
            idct_put(a, mb_x, mb_y);
462
        }
463
    }
464
#if 0    
465
int i;
466
printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
467
for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
468
    printf("%d", get_bits1(&a->gb));
469
}
470

471
for(i=0; i<s->avctx->extradata_size; i++){
472
    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
473
}
474
#endif
475

    
476
    *picture= *(AVFrame*)&a->picture;
477
    *data_size = sizeof(AVPicture);
478

    
479
    emms_c();
480
    
481
    return (get_bits_count(&a->gb)+31)/32*4;
482
}
483

    
484
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
485
    ASV1Context * const a = avctx->priv_data;
486
    AVFrame *pict = data;
487
    AVFrame * const p= (AVFrame*)&a->picture;
488
    int size;
489
    int mb_x, mb_y;
490

    
491
    init_put_bits(&a->pb, buf, buf_size);
492
    
493
    *p = *pict;
494
    p->pict_type= I_TYPE;
495
    p->key_frame= 1;
496

    
497
    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
498
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
499
            dct_get(a, mb_x, mb_y);
500
            encode_mb(a, a->block);
501
        }
502
    }
503

    
504
    if(a->mb_width2 != a->mb_width){
505
        mb_x= a->mb_width2;
506
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
507
            dct_get(a, mb_x, mb_y);
508
            encode_mb(a, a->block);
509
        }
510
    }
511

    
512
    if(a->mb_height2 != a->mb_height){
513
        mb_y= a->mb_height2;
514
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
515
            dct_get(a, mb_x, mb_y);
516
            encode_mb(a, a->block);
517
        }
518
    }
519
    emms_c();
520
    
521
    align_put_bits(&a->pb);
522
    while(get_bit_count(&a->pb)&31)
523
        put_bits(&a->pb, 8, 0);
524
    
525
    size= get_bit_count(&a->pb)/32;
526
    
527
    if(avctx->codec_id == CODEC_ID_ASV1)
528
        a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
529
    else{
530
        int i;
531
        for(i=0; i<4*size; i++)
532
            buf[i]= reverse[ buf[i] ];
533
    }
534
    
535
    return size*4;
536
}
537

    
538
static void common_init(AVCodecContext *avctx){
539
    ASV1Context * const a = avctx->priv_data;
540

    
541
    dsputil_init(&a->dsp, avctx);
542

    
543
    a->mb_width   = (avctx->width  + 15) / 16;
544
    a->mb_height  = (avctx->height + 15) / 16;
545
    a->mb_width2  = (avctx->width  + 0) / 16;
546
    a->mb_height2 = (avctx->height + 0) / 16;
547

    
548
    avctx->coded_frame= (AVFrame*)&a->picture;
549
    a->avctx= avctx;
550
}
551

    
552
static int decode_init(AVCodecContext *avctx){
553
    ASV1Context * const a = avctx->priv_data;
554
    AVFrame *p= (AVFrame*)&a->picture;
555
    int i;
556
    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
557
 
558
    common_init(avctx);
559
    init_vlcs(a);
560
    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
561

    
562
    a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
563
    if(a->inv_qscale == 0){
564
        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
565
        if(avctx->codec_id == CODEC_ID_ASV1)
566
            a->inv_qscale= 6;
567
        else
568
            a->inv_qscale= 10;
569
    }
570

    
571
    for(i=0; i<64; i++){
572
        int index= scantab[i];
573

    
574
        a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
575
    }
576

    
577
    p->qstride= a->mb_width;
578
    p->qscale_table= av_mallocz( p->qstride * a->mb_height);
579
    p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
580
    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
581

    
582
    return 0;
583
}
584

    
585
static int encode_init(AVCodecContext *avctx){
586
    ASV1Context * const a = avctx->priv_data;
587
    int i;
588
    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
589

    
590
    common_init(avctx);
591
    
592
    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
593

    
594
    a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
595
    
596
    avctx->extradata= av_mallocz(8);
597
    avctx->extradata_size=8;
598
    ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
599
    ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));
600
    
601
    for(i=0; i<64; i++){
602
        int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
603
        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
604
    }
605

    
606
    return 0;
607
}
608

    
609
static int decode_end(AVCodecContext *avctx){
610
    ASV1Context * const a = avctx->priv_data;
611

    
612
    av_freep(&a->bitstream_buffer);
613
    av_freep(&a->picture.qscale_table);
614
    a->bitstream_buffer_size=0;
615
    
616
    avcodec_default_free_buffers(avctx);
617

    
618
    return 0;
619
}
620

    
621
AVCodec asv1_decoder = {
622
    "asv1",
623
    CODEC_TYPE_VIDEO,
624
    CODEC_ID_ASV1,
625
    sizeof(ASV1Context),
626
    decode_init,
627
    NULL,
628
    decode_end,
629
    decode_frame,
630
    CODEC_CAP_DR1,
631
};
632

    
633
AVCodec asv2_decoder = {
634
    "asv2",
635
    CODEC_TYPE_VIDEO,
636
    CODEC_ID_ASV2,
637
    sizeof(ASV1Context),
638
    decode_init,
639
    NULL,
640
    decode_end,
641
    decode_frame,
642
    CODEC_CAP_DR1,
643
};
644

    
645
#ifdef CONFIG_ENCODERS
646

    
647
AVCodec asv1_encoder = {
648
    "asv1",
649
    CODEC_TYPE_VIDEO,
650
    CODEC_ID_ASV1,
651
    sizeof(ASV1Context),
652
    encode_init,
653
    encode_frame,
654
    //encode_end,
655
};
656

    
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
};
666

    
667
#endif //CONFIG_ENCODERS