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1
/*
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 * ASUS V1/V2 codec
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 * 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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
19

    
20
/**
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 * @file asv1.c
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 * ASUS V1/V2 codec.
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 */
24

    
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
28

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

    
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#define VLC_BITS 6
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#define ASV2_LEVEL_VLC_BITS 10
34

    
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typedef struct ASV1Context{
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    AVCodecContext *avctx;
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    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;
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    int inv_qscale;
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    int mb_width;
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    int mb_height;
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    int mb_width2;
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    int mb_height2;
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    DECLARE_ALIGNED_8(DCTELEM, block[6][64]);
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    DECLARE_ALIGNED_8(uint16_t, intra_matrix[64]);
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    DECLARE_ALIGNED_8(int, q_intra_matrix[64]);
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    uint8_t *bitstream_buffer;
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    unsigned int bitstream_buffer_size;
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} 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,
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};
64

    
65

    
66
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
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};
73

    
74
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}
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};
77

    
78
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},
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};
82

    
83
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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};
89

    
90
static const uint8_t asv2_level_tab[63][2]={
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    {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},
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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},
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};
105

    
106

    
107
static VLC ccp_vlc;
108
static VLC level_vlc;
109
static VLC dc_ccp_vlc;
110
static VLC ac_ccp_vlc;
111
static VLC asv2_level_vlc;
112

    
113
static void init_vlcs(ASV1Context *a){
114
    static int done = 0;
115

    
116
    if (!done) {
117
        done = 1;
118

    
119
        init_vlc(&ccp_vlc, VLC_BITS, 17,
120
                 &ccp_tab[0][1], 2, 1,
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                 &ccp_tab[0][0], 2, 1, 1);
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        init_vlc(&dc_ccp_vlc, VLC_BITS, 8,
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                 &dc_ccp_tab[0][1], 2, 1,
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                 &dc_ccp_tab[0][0], 2, 1, 1);
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        init_vlc(&ac_ccp_vlc, VLC_BITS, 16,
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                 &ac_ccp_tab[0][1], 2, 1,
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                 &ac_ccp_tab[0][0], 2, 1, 1);
128
        init_vlc(&level_vlc,  VLC_BITS, 7,
129
                 &level_tab[0][1], 2, 1,
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                 &level_tab[0][0], 2, 1, 1);
131
        init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
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                 &asv2_level_tab[0][1], 2, 1,
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                 &asv2_level_tab[0][0], 2, 1, 1);
134
    }
135
}
136

    
137
//FIXME write a reversed bitstream reader to avoid the double reverse
138
static inline int asv2_get_bits(GetBitContext *gb, int n){
139
    return ff_reverse[ get_bits(gb, n) << (8-n) ];
140
}
141

    
142
static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
143
    put_bits(pb, n, ff_reverse[ v << (8-n) ]);
144
}
145

    
146
static inline int asv1_get_level(GetBitContext *gb){
147
    int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
148

    
149
    if(code==3) return get_sbits(gb, 8);
150
    else        return code - 3;
151
}
152

    
153
static inline int asv2_get_level(GetBitContext *gb){
154
    int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
155

    
156
    if(code==31) return (int8_t)asv2_get_bits(gb, 8);
157
    else         return code - 31;
158
}
159

    
160
static inline void asv1_put_level(PutBitContext *pb, int level){
161
    unsigned int index= level + 3;
162

    
163
    if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
164
    else{
165
        put_bits(pb, level_tab[3][1], level_tab[3][0]);
166
        put_bits(pb, 8, level&0xFF);
167
    }
168
}
169

    
170
static inline void asv2_put_level(PutBitContext *pb, int level){
171
    unsigned int index= level + 31;
172

    
173
    if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
174
    else{
175
        put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
176
        asv2_put_bits(pb, 8, level&0xFF);
177
    }
178
}
179

    
180
static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
181
    int i;
182

    
183
    block[0]= 8*get_bits(&a->gb, 8);
184

    
185
    for(i=0; i<11; i++){
186
        const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
187

    
188
        if(ccp){
189
            if(ccp == 16) break;
190
            if(ccp < 0 || i>=10){
191
                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
192
                return -1;
193
            }
194

    
195
            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
196
            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
197
            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
198
            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
199
        }
200
    }
201

    
202
    return 0;
203
}
204

    
205
static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
206
    int i, count, ccp;
207

    
208
    count= asv2_get_bits(&a->gb, 4);
209

    
210
    block[0]= 8*asv2_get_bits(&a->gb, 8);
211

    
212
    ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
213
    if(ccp){
214
        if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
215
        if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
216
        if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
217
    }
218

    
219
    for(i=1; i<count+1; i++){
220
        const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
221

    
222
        if(ccp){
223
            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
224
            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
225
            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
226
            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
227
        }
228
    }
229

    
230
    return 0;
231
}
232

    
233
static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
234
    int i;
235
    int nc_count=0;
236

    
237
    put_bits(&a->pb, 8, (block[0] + 32)>>6);
238
    block[0]= 0;
239

    
240
    for(i=0; i<10; i++){
241
        const int index= scantab[4*i];
242
        int ccp=0;
243

    
244
        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
245
        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
246
        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
247
        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
248

    
249
        if(ccp){
250
            for(;nc_count; nc_count--)
251
                put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
252

    
253
            put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
254

    
255
            if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
256
            if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
257
            if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
258
            if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
259
        }else{
260
            nc_count++;
261
        }
262
    }
263
    put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
264
}
265

    
266
static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
267
    int i;
268
    int count=0;
269

    
270
    for(count=63; count>3; count--){
271
        const int index= scantab[count];
272

    
273
        if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
274
            break;
275
    }
276

    
277
    count >>= 2;
278

    
279
    asv2_put_bits(&a->pb, 4, count);
280
    asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
281
    block[0]= 0;
282

    
283
    for(i=0; i<=count; i++){
284
        const int index= scantab[4*i];
285
        int ccp=0;
286

    
287
        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
288
        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
289
        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
290
        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
291

    
292
        if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
293
        else  put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
294

    
295
        if(ccp){
296
            if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
297
            if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
298
            if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
299
            if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
300
        }
301
    }
302
}
303

    
304
static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
305
    int i;
306

    
307
    a->dsp.clear_blocks(block[0]);
308

    
309
    if(a->avctx->codec_id == CODEC_ID_ASV1){
310
        for(i=0; i<6; i++){
311
            if( asv1_decode_block(a, block[i]) < 0)
312
                return -1;
313
        }
314
    }else{
315
        for(i=0; i<6; i++){
316
            if( asv2_decode_block(a, block[i]) < 0)
317
                return -1;
318
        }
319
    }
320
    return 0;
321
}
322

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

    
326
    if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
327
        av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
328
        return -1;
329
    }
330

    
331
    if(a->avctx->codec_id == CODEC_ID_ASV1){
332
        for(i=0; i<6; i++)
333
            asv1_encode_block(a, block[i]);
334
    }else{
335
        for(i=0; i<6; i++)
336
            asv2_encode_block(a, block[i]);
337
    }
338
    return 0;
339
}
340

    
341
static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
342
    DCTELEM (*block)[64]= a->block;
343
    int linesize= a->picture.linesize[0];
344

    
345
    uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
346
    uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
347
    uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
348

    
349
    a->dsp.idct_put(dest_y                 , linesize, block[0]);
350
    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
351
    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
352
    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
353

    
354
    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
355
        a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
356
        a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
357
    }
358
}
359

    
360
static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
361
    DCTELEM (*block)[64]= a->block;
362
    int linesize= a->picture.linesize[0];
363
    int i;
364

    
365
    uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
366
    uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
367
    uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
368

    
369
    a->dsp.get_pixels(block[0], ptr_y                 , linesize);
370
    a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
371
    a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
372
    a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
373
    for(i=0; i<4; i++)
374
        a->dsp.fdct(block[i]);
375

    
376
    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
377
        a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
378
        a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
379
        for(i=4; i<6; i++)
380
            a->dsp.fdct(block[i]);
381
    }
382
}
383

    
384
static int decode_frame(AVCodecContext *avctx,
385
                        void *data, int *data_size,
386
                        uint8_t *buf, int buf_size)
387
{
388
    ASV1Context * const a = avctx->priv_data;
389
    AVFrame *picture = data;
390
    AVFrame * const p= (AVFrame*)&a->picture;
391
    int mb_x, mb_y;
392

    
393
    if(p->data[0])
394
        avctx->release_buffer(avctx, p);
395

    
396
    p->reference= 0;
397
    if(avctx->get_buffer(avctx, p) < 0){
398
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
399
        return -1;
400
    }
401
    p->pict_type= I_TYPE;
402
    p->key_frame= 1;
403

    
404
    a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
405

    
406
    if(avctx->codec_id == CODEC_ID_ASV1)
407
        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
408
    else{
409
        int i;
410
        for(i=0; i<buf_size; i++)
411
            a->bitstream_buffer[i]= ff_reverse[ buf[i] ];
412
    }
413

    
414
    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
415

    
416
    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
417
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
418
            if( decode_mb(a, a->block) <0)
419
                return -1;
420

    
421
            idct_put(a, mb_x, mb_y);
422
        }
423
    }
424

    
425
    if(a->mb_width2 != a->mb_width){
426
        mb_x= a->mb_width2;
427
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
428
            if( decode_mb(a, a->block) <0)
429
                return -1;
430

    
431
            idct_put(a, mb_x, mb_y);
432
        }
433
    }
434

    
435
    if(a->mb_height2 != a->mb_height){
436
        mb_y= a->mb_height2;
437
        for(mb_x=0; mb_x<a->mb_width; 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
#if 0
445
int i;
446
printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
447
for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
448
    printf("%d", get_bits1(&a->gb));
449
}
450

451
for(i=0; i<s->avctx->extradata_size; i++){
452
    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
453
}
454
#endif
455

    
456
    *picture= *(AVFrame*)&a->picture;
457
    *data_size = sizeof(AVPicture);
458

    
459
    emms_c();
460

    
461
    return (get_bits_count(&a->gb)+31)/32*4;
462
}
463

    
464
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
465
    ASV1Context * const a = avctx->priv_data;
466
    AVFrame *pict = data;
467
    AVFrame * const p= (AVFrame*)&a->picture;
468
    int size;
469
    int mb_x, mb_y;
470

    
471
    init_put_bits(&a->pb, buf, buf_size);
472

    
473
    *p = *pict;
474
    p->pict_type= I_TYPE;
475
    p->key_frame= 1;
476

    
477
    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
478
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
479
            dct_get(a, mb_x, mb_y);
480
            encode_mb(a, a->block);
481
        }
482
    }
483

    
484
    if(a->mb_width2 != a->mb_width){
485
        mb_x= a->mb_width2;
486
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
487
            dct_get(a, mb_x, mb_y);
488
            encode_mb(a, a->block);
489
        }
490
    }
491

    
492
    if(a->mb_height2 != a->mb_height){
493
        mb_y= a->mb_height2;
494
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
495
            dct_get(a, mb_x, mb_y);
496
            encode_mb(a, a->block);
497
        }
498
    }
499
    emms_c();
500

    
501
    align_put_bits(&a->pb);
502
    while(put_bits_count(&a->pb)&31)
503
        put_bits(&a->pb, 8, 0);
504

    
505
    size= put_bits_count(&a->pb)/32;
506

    
507
    if(avctx->codec_id == CODEC_ID_ASV1)
508
        a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
509
    else{
510
        int i;
511
        for(i=0; i<4*size; i++)
512
            buf[i]= ff_reverse[ buf[i] ];
513
    }
514

    
515
    return size*4;
516
}
517

    
518
static void common_init(AVCodecContext *avctx){
519
    ASV1Context * const a = avctx->priv_data;
520

    
521
    dsputil_init(&a->dsp, avctx);
522

    
523
    a->mb_width   = (avctx->width  + 15) / 16;
524
    a->mb_height  = (avctx->height + 15) / 16;
525
    a->mb_width2  = (avctx->width  + 0) / 16;
526
    a->mb_height2 = (avctx->height + 0) / 16;
527

    
528
    avctx->coded_frame= (AVFrame*)&a->picture;
529
    a->avctx= avctx;
530
}
531

    
532
static int decode_init(AVCodecContext *avctx){
533
    ASV1Context * const a = avctx->priv_data;
534
    AVFrame *p= (AVFrame*)&a->picture;
535
    int i;
536
    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
537

    
538
    common_init(avctx);
539
    init_vlcs(a);
540
    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
541
    avctx->pix_fmt= PIX_FMT_YUV420P;
542

    
543
    a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
544
    if(a->inv_qscale == 0){
545
        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
546
        if(avctx->codec_id == CODEC_ID_ASV1)
547
            a->inv_qscale= 6;
548
        else
549
            a->inv_qscale= 10;
550
    }
551

    
552
    for(i=0; i<64; i++){
553
        int index= scantab[i];
554

    
555
        a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
556
    }
557

    
558
    p->qstride= a->mb_width;
559
    p->qscale_table= av_malloc( p->qstride * a->mb_height);
560
    p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
561
    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
562

    
563
    return 0;
564
}
565

    
566
static int encode_init(AVCodecContext *avctx){
567
    ASV1Context * const a = avctx->priv_data;
568
    int i;
569
    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
570

    
571
    common_init(avctx);
572

    
573
    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
574

    
575
    a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
576

    
577
    avctx->extradata= av_mallocz(8);
578
    avctx->extradata_size=8;
579
    ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
580
    ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));
581

    
582
    for(i=0; i<64; i++){
583
        int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
584
        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
585
    }
586

    
587
    return 0;
588
}
589

    
590
static int decode_end(AVCodecContext *avctx){
591
    ASV1Context * const a = avctx->priv_data;
592

    
593
    av_freep(&a->bitstream_buffer);
594
    av_freep(&a->picture.qscale_table);
595
    a->bitstream_buffer_size=0;
596

    
597
    return 0;
598
}
599

    
600
AVCodec asv1_decoder = {
601
    "asv1",
602
    CODEC_TYPE_VIDEO,
603
    CODEC_ID_ASV1,
604
    sizeof(ASV1Context),
605
    decode_init,
606
    NULL,
607
    decode_end,
608
    decode_frame,
609
    CODEC_CAP_DR1,
610
};
611

    
612
AVCodec asv2_decoder = {
613
    "asv2",
614
    CODEC_TYPE_VIDEO,
615
    CODEC_ID_ASV2,
616
    sizeof(ASV1Context),
617
    decode_init,
618
    NULL,
619
    decode_end,
620
    decode_frame,
621
    CODEC_CAP_DR1,
622
};
623

    
624
#ifdef CONFIG_ENCODERS
625

    
626
AVCodec asv1_encoder = {
627
    "asv1",
628
    CODEC_TYPE_VIDEO,
629
    CODEC_ID_ASV1,
630
    sizeof(ASV1Context),
631
    encode_init,
632
    encode_frame,
633
    //encode_end,
634
};
635

    
636
AVCodec asv2_encoder = {
637
    "asv2",
638
    CODEC_TYPE_VIDEO,
639
    CODEC_ID_ASV2,
640
    sizeof(ASV1Context),
641
    encode_init,
642
    encode_frame,
643
    //encode_end,
644
};
645

    
646
#endif //CONFIG_ENCODERS