1. ffmpeg
  2. Commit a52ef6a894ede214162cd9e95685daa5e656e2f7
Browse code

RV30/40 decoding core

Originally committed as revision 11229 to svn://svn.ffmpeg.org/ffmpeg/trunk

Kostya Shishkov authored on 2007/12/16 21:44:25
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libavcodec/rv34.c
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+/*
1 
+ * RV30/40 decoder common data
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+ * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
3 
+ *
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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
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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 2.1 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,
12 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 
+ * 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 FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 
+ */
20 
+
21 
+/**
22 
+ * @file rv34.c
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+ * RV30/40 decoder common data
24 
+ */
25 
+
26 
+#include "avcodec.h"
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+#include "dsputil.h"
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+#include "mpegvideo.h"
29 
+#include "golomb.h"
30 
+#include "rectangle.h"
31 
+
32 
+#include "rv34vlc.h"
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+#include "rv34data.h"
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+#include "rv34.h"
35 
+
36 
+//#define DEBUG
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+
38 
+/** translation of RV30/40 macroblock types to lavc ones */
39 
+static const int rv34_mb_type_to_lavc[12] = {
40 
+    MB_TYPE_INTRA,
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+    MB_TYPE_INTRA16x16,
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+    MB_TYPE_16x16   | MB_TYPE_L0,
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+    MB_TYPE_8x8     | MB_TYPE_L0,
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+    MB_TYPE_16x16   | MB_TYPE_L0,
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+    MB_TYPE_16x16   | MB_TYPE_L1,
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+    MB_TYPE_SKIP,
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+    MB_TYPE_DIRECT2 | MB_TYPE_16x16,
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+    MB_TYPE_16x8    | MB_TYPE_L0,
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+    MB_TYPE_8x16    | MB_TYPE_L0,
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+    MB_TYPE_16x16   | MB_TYPE_L0L1,
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+    MB_TYPE_16x16   | MB_TYPE_L0
52 
+};
53 
+
54 
+
55 
+static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
56 
+
57 
+/**
58 
+ * @defgroup vlc RV30/40 VLC generating functions
59 
+ * @{
60 
+ */
61 
+
62 
+/**
63 
+ * Generate VLC from codeword lengths.
64 
+ * @param bits   codeword lengths (zeroes are accepted)
65 
+ * @param size   length of input data
66 
+ * @param insyms symbols for input codes (NULL for default ones)
67 
+ */
68 
+static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms)
69 
+{
70 
+    int i;
71 
+    int counts[17] = {0}, codes[17];
72 
+    uint16_t cw[size], syms[size];
73 
+    uint8_t bits2[size];
74 
+    int maxbits = 0, realsize = 0;
75 
+
76 
+    for(i = 0; i < size; i++){
77 
+        if(bits[i]){
78 
+            bits2[realsize] = bits[i];
79 
+            syms[realsize] = insyms ? insyms[i] : i;
80 
+            realsize++;
81 
+            maxbits = FFMAX(maxbits, bits[i]);
82 
+            counts[bits[i]]++;
83 
+        }
84 
+    }
85 
+
86 
+    codes[0] = 0;
87 
+    for(i = 0; i < 16; i++)
88 
+        codes[i+1] = (codes[i] + counts[i]) << 1;
89 
+    for(i = 0; i < realsize; i++)
90 
+        cw[i] = codes[bits2[i]]++;
91 
+
92 
+    init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize,
93 
+                    bits2, 1, 1,
94 
+                    cw,    2, 2,
95 
+                    syms,  2, 2, INIT_VLC_USE_STATIC);
96 
+}
97 
+
98 
+/**
99 
+ * Initialize all tables.
100 
+ */
101 
+static void rv34_init_tables()
102 
+{
103 
+    int i, j, k;
104 
+
105 
+    for(i = 0; i < NUM_INTRA_TABLES; i++){
106 
+        for(j = 0; j < 2; j++){
107 
+            rv34_gen_vlc(rv34_table_intra_cbppat   [i][j], CBPPAT_VLC_SIZE,   &intra_vlcs[i].cbppattern[j],     NULL);
108 
+            rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL);
109 
+            rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j],  NULL);
110 
+            for(k = 0; k < 4; k++)
111 
+                rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2],  CBP_VLC_SIZE,   &intra_vlcs[i].cbp[j][k],         rv34_cbp_code);
112 
+        }
113 
+        for(j = 0; j < 4; j++)
114 
+            rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE, &intra_vlcs[i].first_pattern[j], NULL);
115 
+        rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL);
116 
+    }
117 
+
118 
+    for(i = 0; i < NUM_INTER_TABLES; i++){
119 
+        rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL);
120 
+        for(j = 0; j < 4; j++)
121 
+            rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE, &inter_vlcs[i].cbp[0][j], rv34_cbp_code);
122 
+        for(j = 0; j < 2; j++){
123 
+            rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE, &inter_vlcs[i].first_pattern[j],  NULL);
124 
+            rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL);
125 
+            rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j],  NULL);
126 
+        }
127 
+        rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL);
128 
+    }
129 
+}
130 
+
131 
+/** @} */ // vlc group
132 
+
133 
+
134 
+/**
135 
+ * @defgroup transform RV30/40 inverse transform functions
136 
+ * @{
137 
+ */
138 
+
139 
+static av_always_inline void rv34_row_transform(int temp[16], DCTELEM *block)
140 
+{
141 
+    int i;
142 
+
143 
+    for(i=0; i<4; i++){
144 
+        const int z0= 13*(block[i+8*0] +    block[i+8*2]);
145 
+        const int z1= 13*(block[i+8*0] -    block[i+8*2]);
146 
+        const int z2=  7* block[i+8*1] - 17*block[i+8*3];
147 
+        const int z3= 17* block[i+8*1] +  7*block[i+8*3];
148 
+
149 
+        temp[4*i+0]= z0+z3;
150 
+        temp[4*i+1]= z1+z2;
151 
+        temp[4*i+2]= z1-z2;
152 
+        temp[4*i+3]= z0-z3;
153 
+    }
154 
+}
155 
+
156 
+/**
157 
+ * Real Video 3.0/4.0 inverse transform
158 
+ * Code is almost the same as in SVQ3, only scaling is different.
159 
+ */
160 
+static void rv34_inv_transform(DCTELEM *block){
161 
+    int temp[16];
162 
+    int i;
163 
+
164 
+    rv34_row_transform(temp, block);
165 
+
166 
+    for(i=0; i<4; i++){
167 
+        const int z0= 13*(temp[4*0+i] +    temp[4*2+i]) + 0x200;
168 
+        const int z1= 13*(temp[4*0+i] -    temp[4*2+i]) + 0x200;
169 
+        const int z2=  7* temp[4*1+i] - 17*temp[4*3+i];
170 
+        const int z3= 17* temp[4*1+i] +  7*temp[4*3+i];
171 
+
172 
+        block[i*8+0]= (z0 + z3)>>10;
173 
+        block[i*8+1]= (z1 + z2)>>10;
174 
+        block[i*8+2]= (z1 - z2)>>10;
175 
+        block[i*8+3]= (z0 - z3)>>10;
176 
+    }
177 
+
178 
+}
179 
+
180 
+/**
181 
+ * RealVideo 3.0/4.0 inverse transform for DC block
182 
+ *
183 
+ * Code is almost the same as rv34_inv_transform()
184 
+ * but final coefficients are multiplied by 1.5 and have no rounding.
185 
+ */
186 
+static void rv34_inv_transform_noround(DCTELEM *block){
187 
+    int temp[16];
188 
+    int i;
189 
+
190 
+    rv34_row_transform(temp, block);
191 
+
192 
+    for(i=0; i<4; i++){
193 
+        const int z0= 13*(temp[4*0+i] +    temp[4*2+i]);
194 
+        const int z1= 13*(temp[4*0+i] -    temp[4*2+i]);
195 
+        const int z2=  7* temp[4*1+i] - 17*temp[4*3+i];
196 
+        const int z3= 17* temp[4*1+i] +  7*temp[4*3+i];
197 
+
198 
+        block[i*8+0]= ((z0 + z3)*3)>>11;
199 
+        block[i*8+1]= ((z1 + z2)*3)>>11;
200 
+        block[i*8+2]= ((z1 - z2)*3)>>11;
201 
+        block[i*8+3]= ((z0 - z3)*3)>>11;
202 
+    }
203 
+
204 
+}
205 
+
206 
+/** @} */ // transform
207 
+
208 
+
209 
+/**
210 
+ * @defgroup block RV30/40 4x4 block decoding functions
211 
+ * @{
212 
+ */
213 
+
214 
+/**
215 
+ * Decode coded block pattern.
216 
+ */
217 
+static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
218 
+{
219 
+    int pattern, code, cbp=0;
220 
+    int ones;
221 
+    static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000};
222 
+    static const int shifts[4] = { 0, 2, 8, 10 };
223 
+    int *curshift = shifts;
224 
+    int i, t, mask;
225 
+
226 
+    code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
227 
+    pattern = code & 0xF;
228 
+    code >>= 4;
229 
+
230 
+    ones = rv34_count_ones[pattern];
231 
+
232 
+    for(mask = 8; mask; mask >>= 1, curshift++){
233 
+        if(pattern & mask)
234 
+            cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
235 
+    }
236 
+
237 
+    for(i = 0; i < 4; i++){
238 
+        t = modulo_three_table[code][i];
239 
+        if(t == 1)
240 
+            cbp |= cbp_masks[get_bits1(gb)] << i;
241 
+        if(t == 2)
242 
+            cbp |= cbp_masks[2] << i;
243 
+    }
244 
+    return cbp;
245 
+}
246 
+
247 
+/**
248 
+ * Get one coefficient value from the bistream and store it.
249 
+ */
250 
+static inline void decode_coeff(DCTELEM *dst, int coef, int esc, GetBitContext *gb, VLC* vlc)
251 
+{
252 
+    if(coef){
253 
+        if(coef == esc){
254 
+            coef = get_vlc2(gb, vlc->table, 9, 2);
255 
+            if(coef > 23){
256 
+                coef -= 23;
257 
+                coef = 22 + ((1 << coef) | get_bits(gb, coef));
258 
+            }
259 
+            coef += esc;
260 
+        }
261 
+        if(get_bits1(gb))
262 
+            coef = -coef;
263 
+        *dst = coef;
264 
+    }
265 
+}
266 
+
267 
+/**
268 
+ * Decode 2x2 subblock of coefficients.
269 
+ */
270 
+static inline void decode_subblock(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc)
271 
+{
272 
+    int coeffs[4];
273 
+
274 
+    coeffs[0] = modulo_three_table[code][0];
275 
+    coeffs[1] = modulo_three_table[code][1];
276 
+    coeffs[2] = modulo_three_table[code][2];
277 
+    coeffs[3] = modulo_three_table[code][3];
278 
+    decode_coeff(dst  , coeffs[0], 3, gb, vlc);
279 
+    if(is_block2){
280 
+        decode_coeff(dst+8, coeffs[1], 2, gb, vlc);
281 
+        decode_coeff(dst+1, coeffs[2], 2, gb, vlc);
282 
+    }else{
283 
+        decode_coeff(dst+1, coeffs[1], 2, gb, vlc);
284 
+        decode_coeff(dst+8, coeffs[2], 2, gb, vlc);
285 
+    }
286 
+    decode_coeff(dst+9, coeffs[3], 2, gb, vlc);
287 
+}
288 
+
289 
+/**
290 
+ * Decode coefficients for 4x4 block.
291 
+ *
292 
+ * This is done by filling 2x2 subblocks with decoded coefficients
293 
+ * in this order (the same for subblocks and subblock coefficients):
294 
+ *  o--o
295 
+ *    /
296 
+ *   /
297 
+ *  o--o
298 
+ */
299 
+
300 
+static inline void rv34_decode_block(DCTELEM *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc)
301 
+{
302 
+    int code, pattern;
303 
+
304 
+    code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
305 
+
306 
+    pattern = code & 0x7;
307 
+
308 
+    code >>= 3;
309 
+    decode_subblock(dst, code, 0, gb, &rvlc->coefficient);
310 
+
311 
+    if(pattern & 4){
312 
+        code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
313 
+        decode_subblock(dst + 2, code, 0, gb, &rvlc->coefficient);
314 
+    }
315 
+    if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block
316 
+        code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
317 
+        decode_subblock(dst + 8*2, code, 1, gb, &rvlc->coefficient);
318 
+    }
319 
+    if(pattern & 1){
320 
+        code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
321 
+        decode_subblock(dst + 8*2+2, code, 0, gb, &rvlc->coefficient);
322 
+    }
323 
+
324 
+}
325 
+
326 
+/**
327 
+ * Dequantize ordinary 4x4 block.
328 
+ * @todo optimize
329 
+ */
330 
+static inline void rv34_dequant4x4(DCTELEM *block, int Qdc, int Q)
331 
+{
332 
+    int i, j;
333 
+
334 
+    block[0] = (block[0] * Qdc + 8) >> 4;
335 
+    for(i = 0; i < 4; i++)
336 
+        for(j = !i; j < 4; j++)
337 
+            block[j + i*8] = (block[j + i*8] * Q + 8) >> 4;
338 
+}
339 
+
340 
+/**
341 
+ * Dequantize 4x4 block of DC values for 16x16 macroblock.
342 
+ * @todo optimize
343 
+ */
344 
+static inline void rv34_dequant4x4_16x16(DCTELEM *block, int Qdc, int Q)
345 
+{
346 
+    int i;
347 
+
348 
+    for(i = 0; i < 3; i++)
349 
+         block[rv34_dezigzag[i]] = (block[rv34_dezigzag[i]] * Qdc + 8) >> 4;
350 
+    for(; i < 16; i++)
351 
+         block[rv34_dezigzag[i]] = (block[rv34_dezigzag[i]] * Q + 8) >> 4;
352 
+}
353 
+/** @} */ //block functions
354 
+
355 
+
356 
+/**
357 
+ * @defgroup bitstream RV30/40 bitstream parsing
358 
+ * @{
359 
+ */
360 
+
361 
+static inline int decode210(GetBitContext *gb){
362 
+    if (get_bits1(gb))
363 
+        return 0;
364 
+    else
365 
+        return 2 - get_bits1(gb);
366 
+}
367 
+
368 
+/**
369 
+ * Decode starting slice position.
370 
+ * @todo Maybe replace with ff_h263_decode_mba() ?
371 
+ */
372 
+int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
373 
+{
374 
+    int i;
375 
+    for(i = 0; i < 5; i++)
376 
+        if(rv34_mb_max_sizes[i] > mb_size)
377 
+            break;
378 
+    return rv34_mb_bits_sizes[i];
379 
+}
380 
+
381 
+/**
382 
+ * Select VLC set for decoding from current quantizer, modifier and frame type.
383 
+ */
384 
+static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
385 
+{
386 
+    if(mod == 2 && quant < 19) quant += 10;
387 
+    else if(mod && quant < 26) quant += 5;
388 
+    return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][av_clip(quant, 0, 30)]]
389 
+                : &intra_vlcs[rv34_quant_to_vlc_set[0][av_clip(quant, 0, 30)]];
390 
+}
391 
+
392 
+/**
393 
+ * Decode quantizer difference and return modified quantizer.
394 
+ */
395 
+static inline int rv34_decode_dquant(GetBitContext *gb, int quant)
396 
+{
397 
+    if(get_bits1(gb))
398 
+        return rv34_dquant_tab[get_bits1(gb)][quant];
399 
+    else
400 
+        return get_bits(gb, 5);
401 
+}
402 
+
403 
+/** @} */ //bitstream functions
404 
+
405 
+/**
406 
+ * @defgroup mv motion vector related code (prediction, reconstruction, motion compensation)
407 
+ * @{
408 
+ */
409 
+
410 
+/** macroblock partition width in 8x8 blocks */
411 
+static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 };
412 
+
413 
+/** macroblock partition height in 8x8 blocks */
414 
+static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 };
415 
+
416 
+/** availability index for subblocks */
417 
+static const uint8_t avail_indexes[4] = { 5, 6, 9, 10 };
418 
+
419 
+/**
420 
+ * motion vector prediction
421 
+ *
422 
+ * Motion prediction performed for the block by using median prediction of
423 
+ * motion vectors from the left, top and right top blocks but in corner cases
424 
+ * some other vectors may be used instead.
425 
+ */
426 
+static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
427 
+{
428 
+    MpegEncContext *s = &r->s;
429 
+    int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
430 
+    int A[2] = {0}, B[2], C[2];
431 
+    int i, j;
432 
+    int mx, my;
433 
+    int avail_index = avail_indexes[subblock_no];
434 
+    int c_off = part_sizes_w[block_type];
435 
+
436 
+    mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride;
437 
+    if(subblock_no == 3)
438 
+        c_off = -1;
439 
+
440 
+    if(r->avail_cache[avail_index - 1]){
441 
+        A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0];
442 
+        A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1];
443 
+    }
444 
+    if(r->avail_cache[avail_index - 4]){
445 
+        B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0];
446 
+        B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1];
447 
+    }else{
448 
+        B[0] = A[0];
449 
+        B[1] = A[1];
450 
+    }
451 
+    if(!r->avail_cache[avail_index - 4 + c_off]){
452 
+        if(r->avail_cache[avail_index - 4] && (r->avail_cache[avail_index - 1] || r->rv30)){
453 
+            C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0];
454 
+            C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1];
455 
+        }else{
456 
+            C[0] = A[0];
457 
+            C[1] = A[1];
458 
+        }
459 
+    }else{
460 
+        C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0];
461 
+        C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1];
462 
+    }
463 
+    mx = mid_pred(A[0], B[0], C[0]);
464 
+    my = mid_pred(A[1], B[1], C[1]);
465 
+    mx += r->dmv[dmv_no][0];
466 
+    my += r->dmv[dmv_no][1];
467 
+    for(j = 0; j < part_sizes_h[block_type]; j++){
468 
+        for(i = 0; i < part_sizes_w[block_type]; i++){
469 
+            s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
470 
+            s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my;
471 
+        }
472 
+    }
473 
+}
474 
+
475 
+/**
476 
+ * Predict motion vector for B-frame macroblock.
477 
+ */
478 
+static inline void rv34_pred_b_vector(int A[2], int B[2], int C[2],
479 
+                                      int A_avail, int B_avail, int C_avail,
480 
+                                      int *mx, int *my)
481 
+{
482 
+    if(A_avail + B_avail + C_avail != 3){
483 
+        *mx = A[0] + B[0] + C[0];
484 
+        *my = A[1] + B[1] + C[1];
485 
+        if(A_avail + B_avail + C_avail == 2){
486 
+            *mx /= 2;
487 
+            *my /= 2;
488 
+        }
489 
+    }else{
490 
+        *mx = mid_pred(A[0], B[0], C[0]);
491 
+        *my = mid_pred(A[1], B[1], C[1]);
492 
+    }
493 
+}
494 
+
495 
+/**
496 
+ * motion vector prediction for B-frames
497 
+ */
498 
+static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
499 
+{
500 
+    MpegEncContext *s = &r->s;
501 
+    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
502 
+    int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
503 
+    int A[2], B[2], C[2];
504 
+    int has_A = 0, has_B = 0, has_C = 0;
505 
+    int mx, my;
506 
+    int i, j;
507 
+    Picture *cur_pic = s->current_picture_ptr;
508 
+    const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
509 
+    int type = cur_pic->mb_type[mb_pos];
510 
+
511 
+    memset(A, 0, sizeof(A));
512 
+    memset(B, 0, sizeof(B));
513 
+    memset(C, 0, sizeof(C));
514 
+    if((r->avail_cache[5-1] & type) & mask){
515 
+        A[0] = cur_pic->motion_val[dir][mv_pos - 1][0];
516 
+        A[1] = cur_pic->motion_val[dir][mv_pos - 1][1];
517 
+        has_A = 1;
518 
+    }
519 
+    if((r->avail_cache[5-4] & type) & mask){
520 
+        B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0];
521 
+        B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1];
522 
+        has_B = 1;
523 
+    }
524 
+    if((r->avail_cache[5-2] & type) & mask){
525 
+        C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0];
526 
+        C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1];
527 
+        has_C = 1;
528 
+    }else if((s->mb_x+1) == s->mb_width && (r->avail_cache[5-5] & type) & mask){
529 
+        C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0];
530 
+        C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1];
531 
+        has_C = 1;
532 
+    }
533 
+
534 
+    rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my);
535 
+
536 
+    mx += r->dmv[dir][0];
537 
+    my += r->dmv[dir][1];
538 
+    //XXX add vector for bidirectionally predicted blocks
539 
+    for(j = 0; j < 2; j++){
540 
+        for(i = 0; i < 2; i++){
541 
+            cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
542 
+            cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my;
543 
+        }
544 
+    }
545 
+    if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD)
546 
+        fill_rectangle(cur_pic->motion_val[!dir][mv_pos], 2, 2, s->b8_stride, 0, 4);
547 
+}
548 
+
549 
+/**
550 
+ * generic motion compensation function
551 
+ *
552 
+ * @param r decoder context
553 
+ * @param block_type type of the current block
554 
+ * @param xoff horizontal offset from the start of the current block
555 
+ * @param yoff vertical offset from the start of the current block
556 
+ * @param mv_off offset to the motion vector information
557 
+ * @param width width of the current partition in 8x8 blocks
558 
+ * @param height height of the current partition in 8x8 blocks
559 
+ */
560 
+static inline void rv34_mc(RV34DecContext *r, const int block_type,
561 
+                          const int xoff, const int yoff, int mv_off,
562 
+                          const int width, const int height, int dir,
563 
+                          const int thirdpel,
564 
+                          qpel_mc_func (*qpel_mc)[16],
565 
+                          h264_chroma_mc_func (*chroma_mc))
566 
+{
567 
+    MpegEncContext *s = &r->s;
568 
+    uint8_t *Y, *U, *V, *srcY, *srcU, *srcV;
569 
+    int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
570 
+    int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride + mv_off;
571 
+    int is16x16 = 1;
572 
+
573 
+    if(thirdpel){
574 
+#if 0 /// todo
575 
+        int lx, ly;
576 
+
577 
+        mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 3;
578 
+        my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 3;
579 
+        lx = ((s->current_picture_ptr->motion_val[dir][mv_pos][0] % 3) + 3) % 3;
580 
+        ly = ((s->current_picture_ptr->motion_val[dir][mv_pos][1] % 3) + 3) % 3;
581 
+        dxy = ly*3 + lx;
582 
+        uvmx =
583 
+#endif
584 
+        mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
585 
+        my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
586 
+        dxy = ((my & 3) << 2) | (mx & 3);
587 
+        uvmx = mx & 6;
588 
+        uvmy = my & 6;
589 
+    }else{
590 
+        mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
591 
+        my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
592 
+        dxy = ((my & 3) << 2) | (mx & 3);
593 
+        uvmx = mx & 6;
594 
+        uvmy = my & 6;
595 
+    }
596 
+    srcY = dir ? s->next_picture_ptr->data[0] : s->last_picture_ptr->data[0];
597 
+    srcU = dir ? s->next_picture_ptr->data[1] : s->last_picture_ptr->data[1];
598 
+    srcV = dir ? s->next_picture_ptr->data[2] : s->last_picture_ptr->data[2];
599 
+    src_x = s->mb_x * 16 + xoff + mx;
600 
+    src_y = s->mb_y * 16 + yoff + my;
601 
+    uvsrc_x = s->mb_x * 8 + (xoff >> 1) + (mx >> 1);
602 
+    uvsrc_y = s->mb_y * 8 + (yoff >> 1) + (my >> 1);
603 
+    srcY += src_y * s->linesize + src_x;
604 
+    srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
605 
+    srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
606 
+    if(   (unsigned)(src_x - !!(mx&3)*2) > s->h_edge_pos - !!(mx&3)*2 - (width <<3) - 3
607 
+       || (unsigned)(src_y - !!(my&3)*2) > s->v_edge_pos - !!(my&3)*2 - (height<<3) - 3){
608 
+        uint8_t *uvbuf= s->edge_emu_buffer + 20 * s->linesize;
609 
+
610 
+        srcY -= 2 + 2*s->linesize;
611 
+        ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, (width<<3)+4, (height<<3)+4,
612 
+                            src_x - 2, src_y - 2, s->h_edge_pos, s->v_edge_pos);
613 
+        srcY = s->edge_emu_buffer + 2 + 2*s->linesize;
614 
+        ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, (width<<2)+1, (height<<2)+1,
615 
+                            uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
616 
+        ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, (width<<2)+1, (height<<2)+1,
617 
+                            uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
618 
+        srcU = uvbuf;
619 
+        srcV = uvbuf + 16;
620 
+    }
621 
+    Y = s->dest[0] + xoff      + yoff     *s->linesize;
622 
+    U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
623 
+    V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
624 
+
625 
+    if(block_type == RV34_MB_P_16x8){
626 
+        qpel_mc[1][dxy](Y, srcY, s->linesize);
627 
+        Y    += 8;
628 
+        srcY += 8;
629 
+    }else if(block_type == RV34_MB_P_8x16){
630 
+        qpel_mc[1][dxy](Y, srcY, s->linesize);
631 
+        Y    += 8 * s->linesize;
632 
+        srcY += 8 * s->linesize;
633 
+    }
634 
+    is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
635 
+    qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
636 
+    chroma_mc[2-width]   (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
637 
+    chroma_mc[2-width]   (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
638 
+}
639 
+
640 
+static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
641 
+                        const int xoff, const int yoff, int mv_off,
642 
+                        const int width, const int height, int dir)
643 
+{
644 
+    rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30,
645 
+            r->s.dsp.put_h264_qpel_pixels_tab, r->s.dsp.put_h264_chroma_pixels_tab);
646 
+}
647 
+
648 
+static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
649 
+{
650 
+    rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30,
651 
+            r->s.dsp.put_h264_qpel_pixels_tab, r->s.dsp.put_h264_chroma_pixels_tab);
652 
+    rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30,
653 
+            r->s.dsp.avg_h264_qpel_pixels_tab, r->s.dsp.avg_h264_chroma_pixels_tab);
654 
+}
655 
+
656 
+/** number of motion vectors in each macroblock type */
657 
+static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
658 
+
659 
+/**
660 
+ * Decode motion vector differences
661 
+ * and perform motion vector reconstruction and motion compensation.
662 
+ */
663 
+static int rv34_decode_mv(RV34DecContext *r, int block_type)
664 
+{
665 
+    MpegEncContext *s = &r->s;
666 
+    GetBitContext *gb = &s->gb;
667 
+    int i;
668 
+
669 
+    memset(r->dmv, 0, sizeof(r->dmv));
670 
+    for(i = 0; i < num_mvs[block_type]; i++){
671 
+        r->dmv[i][0] = svq3_get_se_golomb(gb);
672 
+        r->dmv[i][1] = svq3_get_se_golomb(gb);
673 
+    }
674 
+    switch(block_type){
675 
+    case RV34_MB_TYPE_INTRA:
676 
+    case RV34_MB_TYPE_INTRA16x16:
677 
+        fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4);
678 
+        return 0;
679 
+    case RV34_MB_SKIP:
680 
+        if(s->pict_type == P_TYPE){
681 
+            fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4);
682 
+            rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
683 
+            break;
684 
+        }
685 
+    case RV34_MB_B_DIRECT:
686 
+        rv34_pred_mv_b  (r, RV34_MB_B_DIRECT, 0);
687 
+        rv34_pred_mv_b  (r, RV34_MB_B_DIRECT, 1);
688 
+        rv34_mc_2mv     (r, RV34_MB_B_DIRECT);
689 
+        break;
690 
+    case RV34_MB_P_16x16:
691 
+    case RV34_MB_P_MIX16x16:
692 
+        rv34_pred_mv(r, block_type, 0, 0);
693 
+        rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
694 
+        break;
695 
+    case RV34_MB_B_FORWARD:
696 
+    case RV34_MB_B_BACKWARD:
697 
+        r->dmv[1][0] = r->dmv[0][0];
698 
+        r->dmv[1][1] = r->dmv[0][1];
699 
+        rv34_pred_mv_b  (r, block_type, block_type == RV34_MB_B_BACKWARD);
700 
+        rv34_mc_1mv     (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
701 
+        break;
702 
+    case RV34_MB_P_16x8:
703 
+    case RV34_MB_P_8x16:
704 
+        rv34_pred_mv(r, block_type, 0, 0);
705 
+        rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
706 
+        if(block_type == RV34_MB_P_16x8){
707 
+            rv34_mc_1mv(r, block_type, 0, 0, 0,            2, 1, 0);
708 
+            rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
709 
+        }
710 
+        if(block_type == RV34_MB_P_8x16){
711 
+            rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
712 
+            rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
713 
+        }
714 
+        break;
715 
+    case RV34_MB_B_BIDIR:
716 
+        rv34_pred_mv_b  (r, block_type, 0);
717 
+        rv34_pred_mv_b  (r, block_type, 1);
718 
+        rv34_mc_2mv     (r, block_type);
719 
+        break;
720 
+    case RV34_MB_P_8x8:
721 
+        for(i=0;i< 4;i++){
722 
+            rv34_pred_mv(r, block_type, i, i);
723 
+            rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
724 
+        }
725 
+        break;
726 
+    }
727 
+
728 
+    return 0;
729 
+}
730 
+/** @} */ // mv group
731 
+
732 
+/**
733 
+ * @defgroup recons Macroblock reconstruction functions
734 
+ * @{
735 
+ */
736 
+/** mapping of RV30/40 intra prediction types to standard H.264 types */
737 
+static const int ittrans[9] = {
738 
+ DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
739 
+ VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
740 
+};
741 
+
742 
+/** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
743 
+static const int ittrans16[4] = {
744 
+ DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
745 
+};
746 
+
747 
+/**
748 
+ * Perform 4x4 intra prediction.
749 
+ */
750 
+static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
751 
+{
752 
+    uint8_t *prev = dst - stride + 4;
753 
+    uint32_t topleft;
754 
+
755 
+    if(!up && !left)
756 
+        itype = DC_128_PRED;
757 
+    else if(!up){
758 
+        if(itype == VERT_PRED) itype = HOR_PRED;
759 
+        if(itype == DC_PRED)   itype = LEFT_DC_PRED;
760 
+    }else if(!left){
761 
+        if(itype == HOR_PRED)  itype = VERT_PRED;
762 
+        if(itype == DC_PRED)   itype = TOP_DC_PRED;
763 
+        if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
764 
+    }
765 
+    if(!down){
766 
+        if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
767 
+        if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
768 
+    }
769 
+    if(!right && up){
770 
+        topleft = dst[-stride + 3] * 0x01010101;
771 
+        prev = &topleft;
772 
+    }
773 
+    r->h.pred4x4[itype](dst, prev, stride);
774 
+}
775 
+
776 
+/** add_pixels_clamped for 4x4 block */
777 
+static void rv34_add_4x4_block(uint8_t *dst, int stride, DCTELEM block[64], int off)
778 
+{
779 
+    int x, y;
780 
+    for(y = 0; y < 4; y++)
781 
+        for(x = 0; x < 4; x++)
782 
+            dst[x + y*stride] = av_clip_uint8(dst[x + y*stride] + block[off + x+y*8]);
783 
+}
784 
+
785 
+static inline int adjust_pred16(int itype, int up, int left)
786 
+{
787 
+    if(!up && !left)
788 
+        itype = DC_128_PRED8x8;
789 
+    else if(!up){
790 
+        if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
791 
+        if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
792 
+        if(itype == DC_PRED8x8)   itype = LEFT_DC_PRED8x8;
793 
+    }else if(!left){
794 
+        if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
795 
+        if(itype == HOR_PRED8x8)  itype = VERT_PRED8x8;
796 
+        if(itype == DC_PRED8x8)   itype = TOP_DC_PRED8x8;
797 
+    }
798 
+    return itype;
799 
+}
800 
+
801 
+static void rv34_output_macroblock(RV34DecContext *r, int8_t *intra_types, int cbp, int is16)
802 
+{
803 
+    MpegEncContext *s = &r->s;
804 
+    DSPContext *dsp = &s->dsp;
805 
+    int i, j;
806 
+    uint8_t *Y, *U, *V;
807 
+    int itype;
808 
+    int avail[6*8] = {0};
809 
+    int idx;
810 
+
811 
+    // Set neighbour information.
812 
+    if(r->avail_cache[0])
813 
+        avail[0] = 1;
814 
+    if(r->avail_cache[1])
815 
+        avail[1] = avail[2] = 1;
816 
+    if(r->avail_cache[2])
817 
+        avail[3] = avail[4] = 1;
818 
+    if(r->avail_cache[3])
819 
+        avail[5] = 1;
820 
+    if(r->avail_cache[4])
821 
+        avail[8] = avail[16] = 1;
822 
+    if(r->avail_cache[8])
823 
+        avail[24] = avail[32] = 1;
824 
+
825 
+    Y = s->dest[0];
826 
+    U = s->dest[1];
827 
+    V = s->dest[2];
828 
+    if(!is16){
829 
+        for(j = 0; j < 4; j++){
830 
+            idx = 9 + j*8;
831 
+            for(i = 0; i < 4; i++, cbp >>= 1, Y += 4, idx++){
832 
+                rv34_pred_4x4_block(r, Y, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
833 
+                avail[idx] = 1;
834 
+                if(cbp & 1)
835 
+                    rv34_add_4x4_block(Y, s->linesize, s->block[(i>>1)+(j&2)], (i&1)*4+(j&1)*32);
836 
+            }
837 
+            Y += s->linesize * 4 - 4*4;
838 
+            intra_types += s->b4_stride;
839 
+        }
840 
+        intra_types -= s->b4_stride * 4;
841 
+        fill_rectangle(r->avail_cache + 5, 2, 2, 4, 0, 4);
842 
+        for(j = 0; j < 2; j++){
843 
+            idx = 5 + j*4;
844 
+            for(i = 0; i < 2; i++, cbp >>= 1, idx++){
845 
+                rv34_pred_4x4_block(r, U + i*4 + j*4*s->uvlinesize, s->uvlinesize, ittrans[intra_types[i*2+j*2*s->b4_stride]], r->avail_cache[idx-4], r->avail_cache[idx-1], !i && !j, r->avail_cache[idx-3]);
846 
+                rv34_pred_4x4_block(r, V + i*4 + j*4*s->uvlinesize, s->uvlinesize, ittrans[intra_types[i*2+j*2*s->b4_stride]], r->avail_cache[idx-4], r->avail_cache[idx-1], !i && !j, r->avail_cache[idx-3]);
847 
+                r->avail_cache[idx] = 1;
848 
+                if(cbp & 0x01)
849 
+                    rv34_add_4x4_block(U + i*4 + j*4*s->uvlinesize, s->uvlinesize, s->block[4], i*4+j*32);
850 
+                if(cbp & 0x10)
851 
+                    rv34_add_4x4_block(V + i*4 + j*4*s->uvlinesize, s->uvlinesize, s->block[5], i*4+j*32);
852 
+            }
853 
+        }
854 
+    }else{
855 
+        itype = ittrans16[intra_types[0]];
856 
+        itype = adjust_pred16(itype, r->avail_cache[5-4], r->avail_cache[5-1]);
857 
+        r->h.pred16x16[itype](Y, s->linesize);
858 
+        dsp->add_pixels_clamped(s->block[0], Y,     s->current_picture.linesize[0]);
859 
+        dsp->add_pixels_clamped(s->block[1], Y + 8, s->current_picture.linesize[0]);
860 
+        Y += s->current_picture.linesize[0] * 8;
861 
+        dsp->add_pixels_clamped(s->block[2], Y,     s->current_picture.linesize[0]);
862 
+        dsp->add_pixels_clamped(s->block[3], Y + 8, s->current_picture.linesize[0]);
863 
+
864 
+        itype = ittrans16[intra_types[0]];
865 
+        if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
866 
+        itype = adjust_pred16(itype, r->avail_cache[5-4], r->avail_cache[5-1]);
867 
+        r->h.pred8x8[itype](U, s->uvlinesize);
868 
+        dsp->add_pixels_clamped(s->block[4], U, s->uvlinesize);
869 
+        r->h.pred8x8[itype](V, s->uvlinesize);
870 
+        dsp->add_pixels_clamped(s->block[5], V, s->uvlinesize);
871 
+    }
872 
+}
873 
+
874 
+/** @} */ // recons group
875 
+
876 
+/**
877 
+ * @addtogroup bitstream
878 
+ * Decode macroblock header and return CBP in case of success, -1 otherwise.
879 
+ */
880 
+static int rv34_decode_mb_header(RV34DecContext *r, int8_t *intra_types)
881 
+{
882 
+    MpegEncContext *s = &r->s;
883 
+    GetBitContext *gb = &s->gb;
884 
+    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
885 
+    int i, t;
886 
+
887 
+    if(!r->si.type){
888 
+        r->is16 = get_bits1(gb);
889 
+        if(!r->is16 && !r->rv30){
890 
+            if(!get_bits1(gb))
891 
+                av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
892 
+        }
893 
+        s->current_picture_ptr->mb_type[mb_pos] = r->is16 ? MB_TYPE_INTRA16x16 : MB_TYPE_INTRA;
894 
+        r->block_type = r->is16 ? RV34_MB_TYPE_INTRA16x16 : RV34_MB_TYPE_INTRA;
895 
+    }else{
896 
+        r->block_type = r->decode_mb_info(r);
897 
+        if(r->block_type == -1)
898 
+            return -1;
899 
+        s->current_picture_ptr->mb_type[mb_pos] = rv34_mb_type_to_lavc[r->block_type];
900 
+        r->mb_type[mb_pos] = r->block_type;
901 
+        if(r->block_type == RV34_MB_SKIP){
902 
+            if(s->pict_type == P_TYPE)
903 
+                r->mb_type[mb_pos] = RV34_MB_P_16x16;
904 
+            if(s->pict_type == B_TYPE)
905 
+                r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
906 
+        }
907 
+        r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
908 
+        rv34_decode_mv(r, r->block_type);
909 
+        if(r->block_type == RV34_MB_SKIP){
910 
+            fill_rectangle(intra_types, 4, 4, s->b4_stride, 0, sizeof(intra_types[0]));
911 
+            return 0;
912 
+        }
913 
+        r->chroma_vlc = 1;
914 
+        r->luma_vlc   = 0;
915 
+    }
916 
+    if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
917 
+        if(r->is16){
918 
+            t = get_bits(gb, 2);
919 
+            fill_rectangle(intra_types, 4, 4, s->b4_stride, t, sizeof(intra_types[0]));
920 
+            r->luma_vlc   = 2;
921 
+        }else{
922 
+            if(r->decode_intra_types(r, gb, intra_types) < 0)
923 
+                return -1;
924 
+            r->luma_vlc   = 1;
925 
+        }
926 
+        r->chroma_vlc = 0;
927 
+        r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
928 
+    }else{
929 
+        for(i = 0; i < 16; i++)
930 
+            intra_types[(i & 3) + (i>>2) * s->b4_stride] = 0;
931 
+        r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
932 
+        if(r->mb_type[mb_pos] == RV34_MB_P_MIX16x16){
933 
+            r->is16 = 1;
934 
+            r->chroma_vlc = 1;
935 
+            r->luma_vlc   = 2;
936 
+            r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
937 
+        }
938 
+    }
939 
+
940 
+    return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
941 
+}
942 
+
943 
+/**
944 
+ * @addtogroup recons
945 
+ * @{
946 
+ */
947 
+/**
948 
+ * mask for retrieving all bits in coded block pattern
949 
+ * corresponding to one 8x8 block
950 
+ */
951 
+#define LUMA_CBP_BLOCK_MASK 0x303
952 
+
953 
+#define U_CBP_MASK 0x0F0000
954 
+#define V_CBP_MASK 0xF00000
955 
+
956 
+
957 
+static void rv34_apply_differences(RV34DecContext *r, int cbp)
958 
+{
959 
+    static const int shifts[4] = { 0, 2, 8, 10 };
960 
+    MpegEncContext *s = &r->s;
961 
+    int i;
962 
+
963 
+    for(i = 0; i < 4; i++)
964 
+        if(cbp & (LUMA_CBP_BLOCK_MASK << shifts[i]))
965 
+            s->dsp.add_pixels_clamped(s->block[i], s->dest[0] + (i & 1)*8 + (i&2)*4*s->linesize, s->linesize);
966 
+    if(cbp & U_CBP_MASK)
967 
+        s->dsp.add_pixels_clamped(s->block[4], s->dest[1], s->uvlinesize);
968 
+    if(cbp & V_CBP_MASK)
969 
+        s->dsp.add_pixels_clamped(s->block[5], s->dest[2], s->uvlinesize);
970 
+}
971 
+
972 
+static int rv34_decode_macroblock(RV34DecContext *r, int8_t *intra_types)
973 
+{
974 
+    MpegEncContext *s = &r->s;
975 
+    GetBitContext *gb = &s->gb;
976 
+    int cbp, cbp2;
977 
+    int i, blknum, blkoff;
978 
+    DCTELEM block16[64];
979 
+    int luma_dc_quant;
980 
+    int dist;
981 
+    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
982 
+
983 
+    // Calculate which neighbours are available. Maybe it's worth optimizing too.
984 
+    memset(r->avail_cache, 0, sizeof(r->avail_cache));
985 
+    fill_rectangle(r->avail_cache + 5, 2, 2, 4, 1, 4);
986 
+    dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
987 
+    if(s->mb_x && dist)
988 
+        r->avail_cache[4] =
989 
+        r->avail_cache[8] = s->current_picture_ptr->mb_type[mb_pos - 1];
990 
+    if(dist >= s->mb_width)
991 
+        r->avail_cache[1] =
992 
+        r->avail_cache[2] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
993 
+    if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
994 
+        r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
995 
+    if(s->mb_x && dist > s->mb_width)
996 
+        r->avail_cache[0] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
997 
+
998 
+    s->qscale = r->si.quant;
999 
+    cbp = cbp2 = rv34_decode_mb_header(r, intra_types);
1000 
+
1001 
+    if(cbp == -1)
1002 
+        return -1;
1003 
+
1004 
+    luma_dc_quant = r->si.type ? r->luma_dc_quant_p[s->qscale] : r->luma_dc_quant_i[s->qscale];
1005 
+    if(r->is16){
1006 
+        memset(block16, 0, sizeof(block16));
1007 
+        rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0);
1008 
+        rv34_dequant4x4_16x16(block16, rv34_qscale_tab[luma_dc_quant],rv34_qscale_tab[s->qscale]);
1009 
+        rv34_inv_transform_noround(block16);
1010 
+    }
1011 
+
1012 
+    for(i = 0; i < 16; i++, cbp >>= 1){
1013 
+        if(!r->is16 && !(cbp & 1)) continue;
1014 
+        blknum = ((i & 2) >> 1) + ((i & 8) >> 2);
1015 
+        blkoff = ((i & 1) << 2) + ((i & 4) << 3);
1016 
+        if(cbp & 1)
1017 
+            rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->luma_vlc, 0);
1018 
+        rv34_dequant4x4(s->block[blknum] + blkoff, rv34_qscale_tab[luma_dc_quant],rv34_qscale_tab[s->qscale]);
1019 
+        if(r->is16) //FIXME: optimize
1020 
+            s->block[blknum][blkoff] = block16[(i & 3) | ((i & 0xC) << 1)];
1021 
+        rv34_inv_transform(s->block[blknum] + blkoff);
1022 
+    }
1023 
+    if(r->block_type == RV34_MB_P_MIX16x16)
1024 
+        r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1025 
+    for(; i < 24; i++, cbp >>= 1){
1026 
+        if(!(cbp & 1)) continue;
1027 
+        blknum = ((i & 4) >> 2) + 4;
1028 
+        blkoff = ((i & 1) << 2) + ((i & 2) << 4);
1029 
+        rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->chroma_vlc, 1);
1030 
+        rv34_dequant4x4(s->block[blknum] + blkoff, rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]],rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]]);
1031 
+        rv34_inv_transform(s->block[blknum] + blkoff);
1032 
+    }
1033 
+    if(IS_INTRA(s->current_picture_ptr->mb_type[s->mb_x + s->mb_y*s->mb_stride]))
1034 
+        rv34_output_macroblock(r, intra_types, cbp2, r->is16);
1035 
+    else
1036 
+        rv34_apply_differences(r, cbp2);
1037 
+
1038 
+    return 0;
1039 
+}
1040 
+
1041 
+static int check_slice_end(RV34DecContext *r, MpegEncContext *s)
1042 
+{
1043 
+    int bits;
1044 
+    if(s->mb_y >= s->mb_height)
1045 
+        return 1;
1046 
+    if(!s->mb_num_left)
1047 
+        return 1;
1048 
+    if(r->s.mb_skip_run > 1)
1049 
+        return 0;
1050 
+    bits = r->bits - get_bits_count(&s->gb);
1051 
+    if(bits < 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1052 
+        return 1;
1053 
+    return 0;
1054 
+}
1055 
+
1056 
+static inline int slice_compare(SliceInfo *si1, SliceInfo *si2)
1057 
+{
1058 
+    return si1->type   != si2->type  ||
1059 
+           si1->start  >= si2->start ||
1060 
+           si1->width  != si2->width ||
1061 
+           si1->height != si2->height;
1062 
+}
1063 
+
1064 
+static int rv34_decode_slice(RV34DecContext *r, int end, uint8_t* buf, int buf_size)
1065 
+{
1066 
+    MpegEncContext *s = &r->s;
1067 
+    GetBitContext *gb = &s->gb;
1068 
+    int mb_pos;
1069 
+    int res;
1070 
+
1071 
+    init_get_bits(&r->s.gb, buf, buf_size*8);
1072 
+    res = r->parse_slice_header(r, gb, &r->si);
1073 
+    if(res < 0){
1074 
+        av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1075 
+        return -1;
1076 
+    }
1077 
+
1078 
+    if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
1079 
+        if(s->width != r->si.width || s->height != r->si.height){
1080 
+            av_log(s->avctx, AV_LOG_DEBUG, "Changing dimensions to %dx%d\n", r->si.width,r->si.height);
1081 
+            MPV_common_end(s);
1082 
+            s->width  = r->si.width;
1083 
+            s->height = r->si.height;
1084 
+            if(MPV_common_init(s) < 0)
1085 
+                return -1;
1086 
+            r->intra_types_hist = av_realloc(r->intra_types_hist, s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1087 
+            r->intra_types = r->intra_types_hist + s->b4_stride * 4;
1088 
+            r->mb_type = av_realloc(r->mb_type, r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type));
1089 
+        }
1090 
+        s->pict_type = r->si.type ? r->si.type : I_TYPE;
1091 
+        if(MPV_frame_start(s, s->avctx) < 0)
1092 
+            return -1;
1093 
+        ff_er_frame_start(s);
1094 
+        s->current_picture_ptr = &s->current_picture;
1095 
+        s->mb_x = s->mb_y = 0;
1096 
+    }
1097 
+
1098 
+    r->si.end = end;
1099 
+    s->qscale = r->si.quant;
1100 
+    r->bits = buf_size*8;
1101 
+    s->mb_num_left = r->si.end - r->si.start;
1102 
+    r->s.mb_skip_run = 0;
1103 
+
1104 
+    mb_pos = s->mb_x + s->mb_y * s->mb_width;
1105 
+    if(r->si.start != mb_pos){
1106 
+        av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1107 
+        s->mb_x = r->si.start % s->mb_width;
1108 
+        s->mb_y = r->si.start / s->mb_width;
1109 
+    }
1110 
+    memset(r->intra_types_hist, -1, s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1111 
+    s->first_slice_line = 1;
1112 
+    s->resync_mb_x= s->mb_x;
1113 
+    s->resync_mb_y= s->mb_y;
1114 
+
1115 
+    ff_init_block_index(s);
1116 
+    while(!check_slice_end(r, s)) {
1117 
+        ff_update_block_index(s);
1118 
+        s->dsp.clear_blocks(s->block[0]);
1119 
+
1120 
+        if(rv34_decode_macroblock(r, r->intra_types + s->mb_x * 4 + 1) < 0){
1121 
+            ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
1122 
+            return -1;
1123 
+        }
1124 
+        if (++s->mb_x == s->mb_width) {
1125 
+            s->mb_x = 0;
1126 
+            s->mb_y++;
1127 
+            ff_init_block_index(s);
1128 
+
1129 
+            memmove(r->intra_types_hist, r->intra_types, s->b4_stride * 4 * sizeof(*r->intra_types_hist));
1130 
+            memset(r->intra_types, -1, s->b4_stride * 4 * sizeof(*r->intra_types_hist));
1131 
+        }
1132 
+        if(s->mb_x == s->resync_mb_x)
1133 
+            s->first_slice_line=0;
1134 
+        s->mb_num_left--;
1135 
+    }
1136 
+    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
1137 
+
1138 
+    return (s->mb_y == s->mb_height);
1139 
+}
1140 
+
1141 
+/** @} */ // recons group end
1142 
+
1143 
+/**
1144 
+ * Initialize decoder.
1145 
+ */
1146 
+int ff_rv34_decode_init(AVCodecContext *avctx)
1147 
+{
1148 
+    RV34DecContext *r = avctx->priv_data;
1149 
+    MpegEncContext *s = &r->s;
1150 
+
1151 
+    MPV_decode_defaults(s);
1152 
+    s->avctx= avctx;
1153 
+    s->out_format = FMT_H263;
1154 
+    s->codec_id= avctx->codec_id;
1155 
+
1156 
+    s->width = avctx->width;
1157 
+    s->height = avctx->height;
1158 
+
1159 
+    r->s.avctx = avctx;
1160 
+    avctx->flags |= CODEC_FLAG_EMU_EDGE;
1161 
+    r->s.flags |= CODEC_FLAG_EMU_EDGE;
1162 
+    avctx->pix_fmt = PIX_FMT_YUV420P;
1163 
+    avctx->has_b_frames = 1;
1164 
+    s->low_delay = 0;
1165 
+
1166 
+    if (MPV_common_init(s) < 0)
1167 
+        return -1;
1168 
+
1169 
+    ff_h264_pred_init(&r->h, CODEC_ID_RV40);
1170 
+
1171 
+    r->intra_types_hist = av_malloc(s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1172 
+    r->intra_types = r->intra_types_hist + s->b4_stride * 4;
1173 
+
1174 
+    r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type));
1175 
+
1176 
+    if(!intra_vlcs[0].cbppattern[0].bits)
1177 
+        rv34_init_tables();
1178 
+
1179 
+    return 0;
1180 
+}
1181 
+
1182 
+static int get_slice_offset(AVCodecContext *avctx, uint8_t *buf, int n)
1183 
+{
1184 
+    if(avctx->slice_count) return avctx->slice_offset[n];
1185 
+    else                   return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) :  AV_RB32(buf + n*8);
1186 
+}
1187 
+
1188 
+int ff_rv34_decode_frame(AVCodecContext *avctx,
1189 
+                            void *data, int *data_size,
1190 
+                            uint8_t *buf, int buf_size)
1191 
+{
1192 
+    RV34DecContext *r = avctx->priv_data;
1193 
+    MpegEncContext *s = &r->s;
1194 
+    AVFrame *pict = data;
1195 
+    SliceInfo si;
1196 
+    int i;
1197 
+    int slice_count;
1198 
+    uint8_t *slices_hdr = NULL;
1199 
+    int last = 0;
1200 
+
1201 
+    /* no supplementary picture */
1202 
+    if (buf_size == 0) {
1203 
+        /* special case for last picture */
1204 
+        if (s->low_delay==0 && s->next_picture_ptr) {
1205 
+            *pict= *(AVFrame*)s->next_picture_ptr;
1206 
+            s->next_picture_ptr= NULL;
1207 
+
1208 
+            *data_size = sizeof(AVFrame);
1209 
+        }
1210 
+        return 0;
1211 
+    }
1212 
+
1213 
+    if(!avctx->slice_count){
1214 
+        slice_count = (*buf++) + 1;
1215 
+        slices_hdr = buf + 4;
1216 
+        buf += 8 * slice_count;
1217 
+    }else
1218 
+        slice_count = avctx->slice_count;
1219 
+
1220 
+    for(i=0; i<slice_count; i++){
1221 
+        int offset= get_slice_offset(avctx, slices_hdr, i);
1222 
+        int size;
1223 
+        if(i+1 == slice_count)
1224 
+            size= buf_size - offset;
1225 
+        else
1226 
+            size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
1227 
+
1228 
+        r->si.end = s->mb_width * s->mb_height;
1229 
+        if(i+1 < slice_count){
1230 
+            init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, i+1), (buf_size-get_slice_offset(avctx, slices_hdr, i+1))*8);
1231 
+            if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1232 
+                if(i+2 < slice_count)
1233 
+                    size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
1234 
+                else
1235 
+                    size = buf_size - offset;
1236 
+            }else
1237 
+                r->si.end = si.start;
1238 
+        }
1239 
+        last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1240 
+        s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1241 
+        if(last)
1242 
+            break;
1243 
+    }
1244 
+
1245 
+    if(last){
1246 
+        if(r->loop_filter)
1247 
+            r->loop_filter(r);
1248 
+        ff_er_frame_end(s);
1249 
+        MPV_frame_end(s);
1250 
+        if (s->pict_type == B_TYPE || s->low_delay) {
1251 
+            *pict= *(AVFrame*)s->current_picture_ptr;
1252 
+        } else if (s->last_picture_ptr != NULL) {
1253 
+            *pict= *(AVFrame*)s->last_picture_ptr;
1254 
+        }
1255 
+
1256 
+        if(s->last_picture_ptr || s->low_delay){
1257 
+            *data_size = sizeof(AVFrame);
1258 
+            ff_print_debug_info(s, pict);
1259 
+        }
1260 
+        s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
1261 
+    }
1262 
+    return buf_size;
1263 
+}
1264 
+
1265 
+int ff_rv34_decode_end(AVCodecContext *avctx)
1266 
+{
1267 
+    RV34DecContext *r = avctx->priv_data;
1268 
+
1269 
+    MPV_common_end(&r->s);
1270 
+
1271 
+    av_freep(&r->intra_types_hist);
1272 
+    r->intra_types = NULL;
1273 
+    av_freep(&r->mb_type);
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+
1275 
+    return 0;
1276 
+}
libavcodec/rv34.h
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+/*
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+ * RV30/40 decoder common data declarations
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+ * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
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+ *
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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
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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 2.1 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,
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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 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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+ */
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+
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+/**
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+ * @file rv34.h
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+ * RV30 and RV40 decoder common data declarations
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+ */
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+
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+#ifndef FFMPEG_RV34_H
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+#define FFMPEG_RV34_H
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+
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+#include "avcodec.h"
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+#include "dsputil.h"
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+#include "mpegvideo.h"
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+
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+#include "h264pred.h"
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+
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+/**
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+ * RV30 and RV40 Macroblock types
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+ */
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+enum RV40BlockTypes{
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+    RV34_MB_TYPE_INTRA,      ///< Intra macroblock
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+    RV34_MB_TYPE_INTRA16x16, ///< Intra macroblock with DCs in a separate 4x4 block
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+    RV34_MB_P_16x16,         ///< P-frame macroblock, one motion frame
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+    RV34_MB_P_8x8,           ///< P-frame macroblock, 8x8 motion compensation partitions
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+    RV34_MB_B_FORWARD,       ///< B-frame macroblock, forward prediction
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+    RV34_MB_B_BACKWARD,      ///< B-frame macroblock, backward prediction
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+    RV34_MB_SKIP,            ///< Skipped block
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+    RV34_MB_B_DIRECT,        ///< Bidirectionally predicted B-frame macroblock, no motion vectors
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+    RV34_MB_P_16x8,          ///< P-frame macroblock, 16x8 motion compensation partitions
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+    RV34_MB_P_8x16,          ///< P-frame macroblock, 8x16 motion compensation partitions
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+    RV34_MB_B_BIDIR,         ///< Bidirectionally predicted B-frame macroblock, two motion vectors
50 
+    RV34_MB_P_MIX16x16,      ///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector
51 
+    RV34_MB_TYPES
52 
+};
53 
+
54 
+/**
55 
+ * VLC tables used by the decoder
56 
+ *
57 
+ * Intra frame VLC sets do not contain some of those tables.
58 
+ */
59 
+typedef struct RV34VLC{
60 
+    VLC cbppattern[2];     ///< VLCs used for pattern of coded block patterns decoding
61 
+    VLC cbp[2][4];         ///< VLCs used for coded block patterns decoding
62 
+    VLC first_pattern[4];  ///< VLCs used for decoding coefficients in the first subblock
63 
+    VLC second_pattern[2]; ///< VLCs used for decoding coefficients in the subblocks 2 and 3
64 
+    VLC third_pattern[2];  ///< VLCs used for decoding coefficients in the last subblock
65 
+    VLC coefficient;       ///< VLCs used for decoding big coefficients
66 
+}RV34VLC;
67 
+
68 
+/** essential slice information */
69 
+typedef struct SliceInfo{
70 
+    int type;              ///< slice type (intra, inter)
71 
+    int quant;             ///< quantizer used for this slice
72 
+    int vlc_set;           ///< VLCs used for this slice
73 
+    int start, end;        ///< start and end macroblocks of the slice
74 
+    int width;             ///< coded width
75 
+    int height;            ///< coded height
76 
+}SliceInfo;
77 
+
78 
+/** decoder context */
79 
+typedef struct RV34DecContext{
80 
+    MpegEncContext s;
81 
+    int8_t *intra_types_hist;///< old block types, used for prediction
82 
+    int8_t *intra_types;     ///< block types
83 
+    uint8_t *luma_dc_quant_i;///< luma subblock DC quantizer for intraframes
84 
+    uint8_t *luma_dc_quant_p;///< luma subblock DC quantizer for interframes
85 
+
86 
+    RV34VLC *cur_vlcs;       ///< VLC set used for current frame decoding
87 
+    int bits;                ///< slice size in bits
88 
+    H264PredContext h;       ///< functions for 4x4 and 16x16 intra block prediction
89 
+    SliceInfo si;            ///< current slice information
90 
+
91 
+    int *mb_type;            ///< internal macroblock types
92 
+    int block_type;          ///< current block type
93 
+    int luma_vlc;            ///< which VLC set will be used for decoding of luma blocks
94 
+    int chroma_vlc;          ///< which VLC set will be used for decoding of chroma blocks
95 
+    int is16;                ///< current block has additional 16x16 specific features or not
96 
+    int dmv[4][2];           ///< differential motion vectors for the current macroblock
97 
+
98 
+    int rv30;                ///< indicates which RV variasnt is currently decoded
99 
+    int rpr;                 ///< one field size in RV30 slice header
100 
+
101 
+    /** 8x8 block available flags (for MV prediction) */
102 
+    DECLARE_ALIGNED_8(uint32_t, avail_cache[3*4]);
103 
+
104 
+    int (*parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si);
105 
+    int (*decode_mb_info)(struct RV34DecContext *r);
106 
+    int (*decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst);
107 
+    void (*loop_filter)(struct RV34DecContext *r);
108 
+}RV34DecContext;
109 
+
110 
+/**
111 
+ * common decoding functions
112 
+ */
113 
+int ff_rv34_get_start_offset(GetBitContext *gb, int blocks);
114 
+int ff_rv34_decode_init(AVCodecContext *avctx);
115 
+int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size);
116 
+int ff_rv34_decode_end(AVCodecContext *avctx);
117 
+
118 
+#endif /* FFMPEG_RV34_H */