2 * VC-1 and WMV3 decoder - DSP functions
3 * Copyright (c) 2006 Konstantin Shishkov
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
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15 * Lesser General Public License for more details.
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18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * VC-1 and WMV3 decoder
31 /** Apply overlap transform to horizontal edge
33 static void vc1_v_overlap_c(uint8_t* src, int stride)
39 for(i = 0; i < 8; i++) {
44 d1 = (a - d + 3 + rnd) >> 3;
45 d2 = (a - d + b - c + 4 - rnd) >> 3;
47 src[-2*stride] = a - d1;
48 src[-stride] = b - d2;
56 /** Apply overlap transform to vertical edge
58 static void vc1_h_overlap_c(uint8_t* src, int stride)
64 for(i = 0; i < 8; i++) {
69 d1 = (a - d + 3 + rnd) >> 3;
70 d2 = (a - d + b - c + 4 - rnd) >> 3;
82 /** Do inverse transform on 8x8 block
84 static void vc1_inv_trans_8x8_c(DCTELEM block[64])
87 register int t1,t2,t3,t4,t5,t6,t7,t8;
92 for(i = 0; i < 8; i++){
93 t1 = 12 * (src[0] + src[4]);
94 t2 = 12 * (src[0] - src[4]);
95 t3 = 16 * src[2] + 6 * src[6];
96 t4 = 6 * src[2] - 16 * src[6];
103 t1 = 16 * src[1] + 15 * src[3] + 9 * src[5] + 4 * src[7];
104 t2 = 15 * src[1] - 4 * src[3] - 16 * src[5] - 9 * src[7];
105 t3 = 9 * src[1] - 16 * src[3] + 4 * src[5] + 15 * src[7];
106 t4 = 4 * src[1] - 9 * src[3] + 15 * src[5] - 16 * src[7];
108 dst[0] = (t5 + t1 + 4) >> 3;
109 dst[1] = (t6 + t2 + 4) >> 3;
110 dst[2] = (t7 + t3 + 4) >> 3;
111 dst[3] = (t8 + t4 + 4) >> 3;
112 dst[4] = (t8 - t4 + 4) >> 3;
113 dst[5] = (t7 - t3 + 4) >> 3;
114 dst[6] = (t6 - t2 + 4) >> 3;
115 dst[7] = (t5 - t1 + 4) >> 3;
123 for(i = 0; i < 8; i++){
124 t1 = 12 * (src[ 0] + src[32]);
125 t2 = 12 * (src[ 0] - src[32]);
126 t3 = 16 * src[16] + 6 * src[48];
127 t4 = 6 * src[16] - 16 * src[48];
134 t1 = 16 * src[ 8] + 15 * src[24] + 9 * src[40] + 4 * src[56];
135 t2 = 15 * src[ 8] - 4 * src[24] - 16 * src[40] - 9 * src[56];
136 t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
137 t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
139 dst[ 0] = (t5 + t1 + 64) >> 7;
140 dst[ 8] = (t6 + t2 + 64) >> 7;
141 dst[16] = (t7 + t3 + 64) >> 7;
142 dst[24] = (t8 + t4 + 64) >> 7;
143 dst[32] = (t8 - t4 + 64 + 1) >> 7;
144 dst[40] = (t7 - t3 + 64 + 1) >> 7;
145 dst[48] = (t6 - t2 + 64 + 1) >> 7;
146 dst[56] = (t5 - t1 + 64 + 1) >> 7;
153 /** Do inverse transform on 8x4 part of block
155 static void vc1_inv_trans_8x4_c(DCTELEM block[64], int n)
158 register int t1,t2,t3,t4,t5,t6,t7,t8;
165 for(i = 0; i < 4; i++){
166 t1 = 12 * (src[0] + src[4]);
167 t2 = 12 * (src[0] - src[4]);
168 t3 = 16 * src[2] + 6 * src[6];
169 t4 = 6 * src[2] - 16 * src[6];
176 t1 = 16 * src[1] + 15 * src[3] + 9 * src[5] + 4 * src[7];
177 t2 = 15 * src[1] - 4 * src[3] - 16 * src[5] - 9 * src[7];
178 t3 = 9 * src[1] - 16 * src[3] + 4 * src[5] + 15 * src[7];
179 t4 = 4 * src[1] - 9 * src[3] + 15 * src[5] - 16 * src[7];
181 dst[0] = (t5 + t1 + 4) >> 3;
182 dst[1] = (t6 + t2 + 4) >> 3;
183 dst[2] = (t7 + t3 + 4) >> 3;
184 dst[3] = (t8 + t4 + 4) >> 3;
185 dst[4] = (t8 - t4 + 4) >> 3;
186 dst[5] = (t7 - t3 + 4) >> 3;
187 dst[6] = (t6 - t2 + 4) >> 3;
188 dst[7] = (t5 - t1 + 4) >> 3;
196 for(i = 0; i < 8; i++){
197 t1 = 17 * (src[ 0] + src[16]);
198 t2 = 17 * (src[ 0] - src[16]);
204 dst[ 0] = (t1 + t3 + t6 + 64) >> 7;
205 dst[ 8] = (t2 - t4 + t5 + 64) >> 7;
206 dst[16] = (t2 + t4 - t5 + 64) >> 7;
207 dst[24] = (t1 - t3 - t6 + 64) >> 7;
214 /** Do inverse transform on 4x8 parts of block
216 static void vc1_inv_trans_4x8_c(DCTELEM block[64], int n)
219 register int t1,t2,t3,t4,t5,t6,t7,t8;
226 for(i = 0; i < 8; i++){
227 t1 = 17 * (src[0] + src[2]);
228 t2 = 17 * (src[0] - src[2]);
234 dst[0] = (t1 + t3 + t6 + 4) >> 3;
235 dst[1] = (t2 - t4 + t5 + 4) >> 3;
236 dst[2] = (t2 + t4 - t5 + 4) >> 3;
237 dst[3] = (t1 - t3 - t6 + 4) >> 3;
245 for(i = 0; i < 4; i++){
246 t1 = 12 * (src[ 0] + src[32]);
247 t2 = 12 * (src[ 0] - src[32]);
248 t3 = 16 * src[16] + 6 * src[48];
249 t4 = 6 * src[16] - 16 * src[48];
256 t1 = 16 * src[ 8] + 15 * src[24] + 9 * src[40] + 4 * src[56];
257 t2 = 15 * src[ 8] - 4 * src[24] - 16 * src[40] - 9 * src[56];
258 t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
259 t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
261 dst[ 0] = (t5 + t1 + 64) >> 7;
262 dst[ 8] = (t6 + t2 + 64) >> 7;
263 dst[16] = (t7 + t3 + 64) >> 7;
264 dst[24] = (t8 + t4 + 64) >> 7;
265 dst[32] = (t8 - t4 + 64 + 1) >> 7;
266 dst[40] = (t7 - t3 + 64 + 1) >> 7;
267 dst[48] = (t6 - t2 + 64 + 1) >> 7;
268 dst[56] = (t5 - t1 + 64 + 1) >> 7;
275 /** Do inverse transform on 4x4 part of block
277 static void vc1_inv_trans_4x4_c(DCTELEM block[64], int n)
280 register int t1,t2,t3,t4,t5,t6;
284 off = (n&1) * 4 + (n&2) * 16;
287 for(i = 0; i < 4; i++){
288 t1 = 17 * (src[0] + src[2]);
289 t2 = 17 * (src[0] - src[2]);
295 dst[0] = (t1 + t3 + t6 + 4) >> 3;
296 dst[1] = (t2 - t4 + t5 + 4) >> 3;
297 dst[2] = (t2 + t4 - t5 + 4) >> 3;
298 dst[3] = (t1 - t3 - t6 + 4) >> 3;
306 for(i = 0; i < 4; i++){
307 t1 = 17 * (src[ 0] + src[16]);
308 t2 = 17 * (src[ 0] - src[16]);
314 dst[ 0] = (t1 + t3 + t6 + 64) >> 7;
315 dst[ 8] = (t2 - t4 + t5 + 64) >> 7;
316 dst[16] = (t2 + t4 - t5 + 64) >> 7;
317 dst[24] = (t1 - t3 - t6 + 64) >> 7;
324 /* motion compensation functions */
326 /** Filter used to interpolate fractional pel values
328 static av_always_inline int vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r)
334 return (-4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2] + 32 - r) >> 6;
336 return (-src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2] + 8 - r) >> 4;
338 return (-3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2] + 32 - r) >> 6;
340 return 0; //should not occur
343 /** Function used to do motion compensation with bicubic interpolation
345 static void vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int mode, int rnd)
348 uint8_t tmp[8*11], *tptr;
355 for(j = 0; j < 11; j++) {
356 for(i = 0; i < 8; i++)
357 tptr[i] = av_clip_uint8(vc1_mspel_filter(src + i, 1, m, r));
365 for(j = 0; j < 8; j++) {
366 for(i = 0; i < 8; i++)
367 dst[i] = av_clip_uint8(vc1_mspel_filter(tptr + i, 8, m, r));
373 /* pixel functions - really are entry points to vc1_mspel_mc */
375 /* this one is defined in dsputil.c */
376 void ff_put_vc1_mspel_mc00_c(uint8_t *dst, const uint8_t *src, int stride, int rnd);
378 static void ff_put_vc1_mspel_mc10_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
379 vc1_mspel_mc(dst, src, stride, 0x1, rnd);
382 static void ff_put_vc1_mspel_mc20_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
383 vc1_mspel_mc(dst, src, stride, 0x2, rnd);
386 static void ff_put_vc1_mspel_mc30_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
387 vc1_mspel_mc(dst, src, stride, 0x3, rnd);
390 static void ff_put_vc1_mspel_mc01_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
391 vc1_mspel_mc(dst, src, stride, 0x4, rnd);
394 static void ff_put_vc1_mspel_mc11_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
395 vc1_mspel_mc(dst, src, stride, 0x5, rnd);
398 static void ff_put_vc1_mspel_mc21_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
399 vc1_mspel_mc(dst, src, stride, 0x6, rnd);
402 static void ff_put_vc1_mspel_mc31_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
403 vc1_mspel_mc(dst, src, stride, 0x7, rnd);
406 static void ff_put_vc1_mspel_mc02_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
407 vc1_mspel_mc(dst, src, stride, 0x8, rnd);
410 static void ff_put_vc1_mspel_mc12_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
411 vc1_mspel_mc(dst, src, stride, 0x9, rnd);
414 static void ff_put_vc1_mspel_mc22_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
415 vc1_mspel_mc(dst, src, stride, 0xA, rnd);
418 static void ff_put_vc1_mspel_mc32_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
419 vc1_mspel_mc(dst, src, stride, 0xB, rnd);
422 static void ff_put_vc1_mspel_mc03_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
423 vc1_mspel_mc(dst, src, stride, 0xC, rnd);
426 static void ff_put_vc1_mspel_mc13_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
427 vc1_mspel_mc(dst, src, stride, 0xD, rnd);
430 static void ff_put_vc1_mspel_mc23_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
431 vc1_mspel_mc(dst, src, stride, 0xE, rnd);
434 static void ff_put_vc1_mspel_mc33_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) {
435 vc1_mspel_mc(dst, src, stride, 0xF, rnd);
438 void ff_vc1dsp_init(DSPContext* dsp, AVCodecContext *avctx) {
439 dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_c;
440 dsp->vc1_inv_trans_4x8 = vc1_inv_trans_4x8_c;
441 dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_c;
442 dsp->vc1_inv_trans_4x4 = vc1_inv_trans_4x4_c;
443 dsp->vc1_h_overlap = vc1_h_overlap_c;
444 dsp->vc1_v_overlap = vc1_v_overlap_c;
446 dsp->put_vc1_mspel_pixels_tab[ 0] = ff_put_vc1_mspel_mc00_c;
447 dsp->put_vc1_mspel_pixels_tab[ 1] = ff_put_vc1_mspel_mc10_c;
448 dsp->put_vc1_mspel_pixels_tab[ 2] = ff_put_vc1_mspel_mc20_c;
449 dsp->put_vc1_mspel_pixels_tab[ 3] = ff_put_vc1_mspel_mc30_c;
450 dsp->put_vc1_mspel_pixels_tab[ 4] = ff_put_vc1_mspel_mc01_c;
451 dsp->put_vc1_mspel_pixels_tab[ 5] = ff_put_vc1_mspel_mc11_c;
452 dsp->put_vc1_mspel_pixels_tab[ 6] = ff_put_vc1_mspel_mc21_c;
453 dsp->put_vc1_mspel_pixels_tab[ 7] = ff_put_vc1_mspel_mc31_c;
454 dsp->put_vc1_mspel_pixels_tab[ 8] = ff_put_vc1_mspel_mc02_c;
455 dsp->put_vc1_mspel_pixels_tab[ 9] = ff_put_vc1_mspel_mc12_c;
456 dsp->put_vc1_mspel_pixels_tab[10] = ff_put_vc1_mspel_mc22_c;
457 dsp->put_vc1_mspel_pixels_tab[11] = ff_put_vc1_mspel_mc32_c;
458 dsp->put_vc1_mspel_pixels_tab[12] = ff_put_vc1_mspel_mc03_c;
459 dsp->put_vc1_mspel_pixels_tab[13] = ff_put_vc1_mspel_mc13_c;
460 dsp->put_vc1_mspel_pixels_tab[14] = ff_put_vc1_mspel_mc23_c;
461 dsp->put_vc1_mspel_pixels_tab[15] = ff_put_vc1_mspel_mc33_c;