2 * Copyright (c) 2003 The FFmpeg Project
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * 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
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * How to use this decoder:
23 * SVQ3 data is transported within Apple Quicktime files. Quicktime files
24 * have stsd atoms to describe media trak properties. A stsd atom for a
25 * video trak contains 1 or more ImageDescription atoms. These atoms begin
26 * with the 4-byte length of the atom followed by the codec fourcc. Some
27 * decoders need information in this atom to operate correctly. Such
28 * is the case with SVQ3. In order to get the best use out of this decoder,
29 * the calling app must make the SVQ3 ImageDescription atom available
30 * via the AVCodecContext's extradata[_size] field:
32 * AVCodecContext.extradata = pointer to ImageDescription, first characters
33 * are expected to be 'S', 'V', 'Q', and '3', NOT the 4-byte atom length
34 * AVCodecContext.extradata_size = size of ImageDescription atom memory
35 * buffer (which will be the same as the ImageDescription atom size field
36 * from the QT file, minus 4 bytes since the length is missing)
38 * You will know you have these parameters passed correctly when the decoder
39 * correctly decodes this file:
40 * http://samples.mplayerhq.hu/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov
45 #include "libavutil/attributes.h"
48 #include "mpegutils.h"
54 #include "rectangle.h"
68 typedef struct SVQ3Frame {
71 AVBufferRef *motion_val_buf[2];
72 int16_t (*motion_val[2])[2];
74 AVBufferRef *mb_type_buf;
78 AVBufferRef *ref_index_buf[2];
82 typedef struct SVQ3Context {
83 AVCodecContext *avctx;
85 H264DSPContext h264dsp;
95 GetBitContext gb_slice;
101 uint32_t watermark_key;
105 int next_p_frame_damaged;
108 int last_frame_output;
113 int frame_num_offset;
114 int prev_frame_num_offset;
117 enum AVPictureType pict_type;
118 enum AVPictureType slice_type;
123 int mb_width, mb_height;
124 int mb_stride, mb_num;
129 int chroma_pred_mode;
130 int intra16x16_pred_mode;
132 int8_t intra4x4_pred_mode_cache[5 * 8];
133 int8_t (*intra4x4_pred_mode);
135 unsigned int top_samples_available;
136 unsigned int topright_samples_available;
137 unsigned int left_samples_available;
139 uint8_t *edge_emu_buffer;
141 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
142 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
143 DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];
144 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
145 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
146 uint32_t dequant4_coeff[QP_MAX_NUM + 1][16];
147 int block_offset[2 * (16 * 3)];
150 #define FULLPEL_MODE 1
151 #define HALFPEL_MODE 2
152 #define THIRDPEL_MODE 3
153 #define PREDICT_MODE 4
155 /* dual scan (from some older H.264 draft)
164 static const uint8_t svq3_scan[16] = {
165 0 + 0 * 4, 1 + 0 * 4, 2 + 0 * 4, 2 + 1 * 4,
166 2 + 2 * 4, 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4,
167 0 + 1 * 4, 0 + 2 * 4, 1 + 1 * 4, 1 + 2 * 4,
168 0 + 3 * 4, 1 + 3 * 4, 2 + 3 * 4, 3 + 3 * 4,
171 static const uint8_t luma_dc_zigzag_scan[16] = {
172 0 * 16 + 0 * 64, 1 * 16 + 0 * 64, 2 * 16 + 0 * 64, 0 * 16 + 2 * 64,
173 3 * 16 + 0 * 64, 0 * 16 + 1 * 64, 1 * 16 + 1 * 64, 2 * 16 + 1 * 64,
174 1 * 16 + 2 * 64, 2 * 16 + 2 * 64, 3 * 16 + 2 * 64, 0 * 16 + 3 * 64,
175 3 * 16 + 1 * 64, 1 * 16 + 3 * 64, 2 * 16 + 3 * 64, 3 * 16 + 3 * 64,
178 static const uint8_t svq3_pred_0[25][2] = {
181 { 0, 2 }, { 1, 1 }, { 2, 0 },
182 { 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 },
183 { 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 },
184 { 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 },
185 { 2, 4 }, { 3, 3 }, { 4, 2 },
190 static const int8_t svq3_pred_1[6][6][5] = {
191 { { 2, -1, -1, -1, -1 }, { 2, 1, -1, -1, -1 }, { 1, 2, -1, -1, -1 },
192 { 2, 1, -1, -1, -1 }, { 1, 2, -1, -1, -1 }, { 1, 2, -1, -1, -1 } },
193 { { 0, 2, -1, -1, -1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 },
194 { 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } },
195 { { 2, 0, -1, -1, -1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 },
196 { 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } },
197 { { 2, 0, -1, -1, -1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 },
198 { 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } },
199 { { 0, 2, -1, -1, -1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 },
200 { 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } },
201 { { 0, 2, -1, -1, -1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 },
202 { 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } },
205 static const struct {
208 } svq3_dct_tables[2][16] = {
209 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 },
210 { 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } },
211 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 },
212 { 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } }
215 static const uint32_t svq3_dequant_coeff[32] = {
216 3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718,
217 9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873,
218 24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683,
219 61694, 68745, 77615, 89113, 100253, 109366, 126635, 141533
222 static int svq3_decode_end(AVCodecContext *avctx);
224 static void svq3_luma_dc_dequant_idct_c(int16_t *output, int16_t *input, int qp)
226 const int qmul = svq3_dequant_coeff[qp];
230 static const uint8_t x_offset[4] = { 0, 1 * stride, 4 * stride, 5 * stride };
232 for (i = 0; i < 4; i++) {
233 const int z0 = 13 * (input[4 * i + 0] + input[4 * i + 2]);
234 const int z1 = 13 * (input[4 * i + 0] - input[4 * i + 2]);
235 const int z2 = 7 * input[4 * i + 1] - 17 * input[4 * i + 3];
236 const int z3 = 17 * input[4 * i + 1] + 7 * input[4 * i + 3];
238 temp[4 * i + 0] = z0 + z3;
239 temp[4 * i + 1] = z1 + z2;
240 temp[4 * i + 2] = z1 - z2;
241 temp[4 * i + 3] = z0 - z3;
244 for (i = 0; i < 4; i++) {
245 const int offset = x_offset[i];
246 const int z0 = 13 * (temp[4 * 0 + i] + temp[4 * 2 + i]);
247 const int z1 = 13 * (temp[4 * 0 + i] - temp[4 * 2 + i]);
248 const int z2 = 7 * temp[4 * 1 + i] - 17 * temp[4 * 3 + i];
249 const int z3 = 17 * temp[4 * 1 + i] + 7 * temp[4 * 3 + i];
251 output[stride * 0 + offset] = (z0 + z3) * qmul + 0x80000 >> 20;
252 output[stride * 2 + offset] = (z1 + z2) * qmul + 0x80000 >> 20;
253 output[stride * 8 + offset] = (z1 - z2) * qmul + 0x80000 >> 20;
254 output[stride * 10 + offset] = (z0 - z3) * qmul + 0x80000 >> 20;
259 static void svq3_add_idct_c(uint8_t *dst, int16_t *block,
260 int stride, int qp, int dc)
262 const int qmul = svq3_dequant_coeff[qp];
266 dc = 13 * 13 * (dc == 1 ? 1538 * block[0]
267 : qmul * (block[0] >> 3) / 2);
271 for (i = 0; i < 4; i++) {
272 const int z0 = 13 * (block[0 + 4 * i] + block[2 + 4 * i]);
273 const int z1 = 13 * (block[0 + 4 * i] - block[2 + 4 * i]);
274 const int z2 = 7 * block[1 + 4 * i] - 17 * block[3 + 4 * i];
275 const int z3 = 17 * block[1 + 4 * i] + 7 * block[3 + 4 * i];
277 block[0 + 4 * i] = z0 + z3;
278 block[1 + 4 * i] = z1 + z2;
279 block[2 + 4 * i] = z1 - z2;
280 block[3 + 4 * i] = z0 - z3;
283 for (i = 0; i < 4; i++) {
284 const int z0 = 13 * (block[i + 4 * 0] + block[i + 4 * 2]);
285 const int z1 = 13 * (block[i + 4 * 0] - block[i + 4 * 2]);
286 const int z2 = 7 * block[i + 4 * 1] - 17 * block[i + 4 * 3];
287 const int z3 = 17 * block[i + 4 * 1] + 7 * block[i + 4 * 3];
288 const int rr = (dc + 0x80000);
290 dst[i + stride * 0] = av_clip_uint8(dst[i + stride * 0] + ((z0 + z3) * qmul + rr >> 20));
291 dst[i + stride * 1] = av_clip_uint8(dst[i + stride * 1] + ((z1 + z2) * qmul + rr >> 20));
292 dst[i + stride * 2] = av_clip_uint8(dst[i + stride * 2] + ((z1 - z2) * qmul + rr >> 20));
293 dst[i + stride * 3] = av_clip_uint8(dst[i + stride * 3] + ((z0 - z3) * qmul + rr >> 20));
296 memset(block, 0, 16 * sizeof(int16_t));
299 static inline int svq3_decode_block(GetBitContext *gb, int16_t *block,
300 int index, const int type)
302 static const uint8_t *const scan_patterns[4] = {
303 luma_dc_zigzag_scan, ff_zigzag_scan, svq3_scan, ff_h264_chroma_dc_scan
306 int run, level, sign, limit;
308 const int intra = 3 * type >> 2;
309 const uint8_t *const scan = scan_patterns[type];
311 for (limit = (16 >> intra); index < 16; index = limit, limit += 8) {
312 for (; (vlc = get_interleaved_ue_golomb(gb)) != 0; index++) {
313 if ((int32_t)vlc < 0)
316 sign = (vlc & 1) ? 0 : -1;
323 } else if (vlc < 4) {
328 level = (vlc + 9 >> 2) - run;
332 run = svq3_dct_tables[intra][vlc].run;
333 level = svq3_dct_tables[intra][vlc].level;
336 level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1)));
339 level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0)));
344 if ((index += run) >= limit)
347 block[scan[index]] = (level ^ sign) - sign;
358 static av_always_inline int
359 svq3_fetch_diagonal_mv(const SVQ3Context *s, const int16_t **C,
360 int i, int list, int part_width)
362 const int topright_ref = s->ref_cache[list][i - 8 + part_width];
364 if (topright_ref != PART_NOT_AVAILABLE) {
365 *C = s->mv_cache[list][i - 8 + part_width];
368 *C = s->mv_cache[list][i - 8 - 1];
369 return s->ref_cache[list][i - 8 - 1];
374 * Get the predicted MV.
375 * @param n the block index
376 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
377 * @param mx the x component of the predicted motion vector
378 * @param my the y component of the predicted motion vector
380 static av_always_inline void svq3_pred_motion(const SVQ3Context *s, int n,
381 int part_width, int list,
382 int ref, int *const mx, int *const my)
384 const int index8 = scan8[n];
385 const int top_ref = s->ref_cache[list][index8 - 8];
386 const int left_ref = s->ref_cache[list][index8 - 1];
387 const int16_t *const A = s->mv_cache[list][index8 - 1];
388 const int16_t *const B = s->mv_cache[list][index8 - 8];
390 int diagonal_ref, match_count;
400 diagonal_ref = svq3_fetch_diagonal_mv(s, &C, index8, list, part_width);
401 match_count = (diagonal_ref == ref) + (top_ref == ref) + (left_ref == ref);
402 if (match_count > 1) { //most common
403 *mx = mid_pred(A[0], B[0], C[0]);
404 *my = mid_pred(A[1], B[1], C[1]);
405 } else if (match_count == 1) {
406 if (left_ref == ref) {
409 } else if (top_ref == ref) {
417 if (top_ref == PART_NOT_AVAILABLE &&
418 diagonal_ref == PART_NOT_AVAILABLE &&
419 left_ref != PART_NOT_AVAILABLE) {
423 *mx = mid_pred(A[0], B[0], C[0]);
424 *my = mid_pred(A[1], B[1], C[1]);
429 static inline void svq3_mc_dir_part(SVQ3Context *s,
430 int x, int y, int width, int height,
431 int mx, int my, int dxy,
432 int thirdpel, int dir, int avg)
434 const SVQ3Frame *pic = (dir == 0) ? s->last_pic : s->next_pic;
437 int blocksize = 2 - (width >> 3); // 16->0, 8->1, 4->2
438 int linesize = s->cur_pic->f->linesize[0];
439 int uvlinesize = s->cur_pic->f->linesize[1];
444 if (mx < 0 || mx >= s->h_edge_pos - width - 1 ||
445 my < 0 || my >= s->v_edge_pos - height - 1) {
447 mx = av_clip(mx, -16, s->h_edge_pos - width + 15);
448 my = av_clip(my, -16, s->v_edge_pos - height + 15);
451 /* form component predictions */
452 dest = s->cur_pic->f->data[0] + x + y * linesize;
453 src = pic->f->data[0] + mx + my * linesize;
456 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, src,
458 width + 1, height + 1,
459 mx, my, s->h_edge_pos, s->v_edge_pos);
460 src = s->edge_emu_buffer;
463 (avg ? s->tdsp.avg_tpel_pixels_tab
464 : s->tdsp.put_tpel_pixels_tab)[dxy](dest, src, linesize,
467 (avg ? s->hdsp.avg_pixels_tab
468 : s->hdsp.put_pixels_tab)[blocksize][dxy](dest, src, linesize,
471 if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
472 mx = mx + (mx < (int) x) >> 1;
473 my = my + (my < (int) y) >> 1;
475 height = height >> 1;
478 for (i = 1; i < 3; i++) {
479 dest = s->cur_pic->f->data[i] + (x >> 1) + (y >> 1) * uvlinesize;
480 src = pic->f->data[i] + mx + my * uvlinesize;
483 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, src,
484 uvlinesize, uvlinesize,
485 width + 1, height + 1,
486 mx, my, (s->h_edge_pos >> 1),
488 src = s->edge_emu_buffer;
491 (avg ? s->tdsp.avg_tpel_pixels_tab
492 : s->tdsp.put_tpel_pixels_tab)[dxy](dest, src,
496 (avg ? s->hdsp.avg_pixels_tab
497 : s->hdsp.put_pixels_tab)[blocksize][dxy](dest, src,
504 static inline int svq3_mc_dir(SVQ3Context *s, int size, int mode,
507 int i, j, k, mx, my, dx, dy, x, y;
508 const int part_width = ((size & 5) == 4) ? 4 : 16 >> (size & 1);
509 const int part_height = 16 >> ((unsigned)(size + 1) / 3);
510 const int extra_width = (mode == PREDICT_MODE) ? -16 * 6 : 0;
511 const int h_edge_pos = 6 * (s->h_edge_pos - part_width) - extra_width;
512 const int v_edge_pos = 6 * (s->v_edge_pos - part_height) - extra_width;
514 for (i = 0; i < 16; i += part_height)
515 for (j = 0; j < 16; j += part_width) {
516 const int b_xy = (4 * s->mb_x + (j >> 2)) +
517 (4 * s->mb_y + (i >> 2)) * s->b_stride;
519 x = 16 * s->mb_x + j;
520 y = 16 * s->mb_y + i;
521 k = (j >> 2 & 1) + (i >> 1 & 2) +
522 (j >> 1 & 4) + (i & 8);
524 if (mode != PREDICT_MODE) {
525 svq3_pred_motion(s, k, part_width >> 2, dir, 1, &mx, &my);
527 mx = s->next_pic->motion_val[0][b_xy][0] << 1;
528 my = s->next_pic->motion_val[0][b_xy][1] << 1;
531 mx = mx * s->frame_num_offset /
532 s->prev_frame_num_offset + 1 >> 1;
533 my = my * s->frame_num_offset /
534 s->prev_frame_num_offset + 1 >> 1;
536 mx = mx * (s->frame_num_offset - s->prev_frame_num_offset) /
537 s->prev_frame_num_offset + 1 >> 1;
538 my = my * (s->frame_num_offset - s->prev_frame_num_offset) /
539 s->prev_frame_num_offset + 1 >> 1;
543 /* clip motion vector prediction to frame border */
544 mx = av_clip(mx, extra_width - 6 * x, h_edge_pos - 6 * x);
545 my = av_clip(my, extra_width - 6 * y, v_edge_pos - 6 * y);
547 /* get (optional) motion vector differential */
548 if (mode == PREDICT_MODE) {
551 dy = get_interleaved_se_golomb(&s->gb_slice);
552 dx = get_interleaved_se_golomb(&s->gb_slice);
554 if (dx == INVALID_VLC || dy == INVALID_VLC) {
555 av_log(s->avctx, AV_LOG_ERROR, "invalid MV vlc\n");
560 /* compute motion vector */
561 if (mode == THIRDPEL_MODE) {
563 mx = (mx + 1 >> 1) + dx;
564 my = (my + 1 >> 1) + dy;
565 fx = (unsigned)(mx + 0x3000) / 3 - 0x1000;
566 fy = (unsigned)(my + 0x3000) / 3 - 0x1000;
567 dxy = (mx - 3 * fx) + 4 * (my - 3 * fy);
569 svq3_mc_dir_part(s, x, y, part_width, part_height,
570 fx, fy, dxy, 1, dir, avg);
573 } else if (mode == HALFPEL_MODE || mode == PREDICT_MODE) {
574 mx = (unsigned)(mx + 1 + 0x3000) / 3 + dx - 0x1000;
575 my = (unsigned)(my + 1 + 0x3000) / 3 + dy - 0x1000;
576 dxy = (mx & 1) + 2 * (my & 1);
578 svq3_mc_dir_part(s, x, y, part_width, part_height,
579 mx >> 1, my >> 1, dxy, 0, dir, avg);
583 mx = (unsigned)(mx + 3 + 0x6000) / 6 + dx - 0x1000;
584 my = (unsigned)(my + 3 + 0x6000) / 6 + dy - 0x1000;
586 svq3_mc_dir_part(s, x, y, part_width, part_height,
587 mx, my, 0, 0, dir, avg);
592 /* update mv_cache */
593 if (mode != PREDICT_MODE) {
594 int32_t mv = pack16to32(mx, my);
596 if (part_height == 8 && i < 8) {
597 AV_WN32A(s->mv_cache[dir][scan8[k] + 1 * 8], mv);
599 if (part_width == 8 && j < 8)
600 AV_WN32A(s->mv_cache[dir][scan8[k] + 1 + 1 * 8], mv);
602 if (part_width == 8 && j < 8)
603 AV_WN32A(s->mv_cache[dir][scan8[k] + 1], mv);
604 if (part_width == 4 || part_height == 4)
605 AV_WN32A(s->mv_cache[dir][scan8[k]], mv);
608 /* write back motion vectors */
609 fill_rectangle(s->cur_pic->motion_val[dir][b_xy],
610 part_width >> 2, part_height >> 2, s->b_stride,
611 pack16to32(mx, my), 4);
617 static av_always_inline void hl_decode_mb_idct_luma(SVQ3Context *s,
618 int mb_type, const int *block_offset,
619 int linesize, uint8_t *dest_y)
622 if (!IS_INTRA4x4(mb_type)) {
623 for (i = 0; i < 16; i++)
624 if (s->non_zero_count_cache[scan8[i]] || s->mb[i * 16]) {
625 uint8_t *const ptr = dest_y + block_offset[i];
626 svq3_add_idct_c(ptr, s->mb + i * 16, linesize,
627 s->qscale, IS_INTRA(mb_type) ? 1 : 0);
632 static av_always_inline void hl_decode_mb_predict_luma(SVQ3Context *s,
634 const int *block_offset,
639 int qscale = s->qscale;
641 if (IS_INTRA4x4(mb_type)) {
642 for (i = 0; i < 16; i++) {
643 uint8_t *const ptr = dest_y + block_offset[i];
644 const int dir = s->intra4x4_pred_mode_cache[scan8[i]];
648 if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
649 const int topright_avail = (s->topright_samples_available << i) & 0x8000;
650 av_assert2(s->mb_y || linesize <= block_offset[i]);
651 if (!topright_avail) {
652 tr = ptr[3 - linesize] * 0x01010101u;
653 topright = (uint8_t *)&tr;
655 topright = ptr + 4 - linesize;
659 s->hpc.pred4x4[dir](ptr, topright, linesize);
660 nnz = s->non_zero_count_cache[scan8[i]];
662 svq3_add_idct_c(ptr, s->mb + i * 16, linesize, qscale, 0);
666 s->hpc.pred16x16[s->intra16x16_pred_mode](dest_y, linesize);
667 svq3_luma_dc_dequant_idct_c(s->mb, s->mb_luma_dc[0], qscale);
671 static void hl_decode_mb(SVQ3Context *s)
673 const int mb_x = s->mb_x;
674 const int mb_y = s->mb_y;
675 const int mb_xy = s->mb_xy;
676 const int mb_type = s->cur_pic->mb_type[mb_xy];
677 uint8_t *dest_y, *dest_cb, *dest_cr;
678 int linesize, uvlinesize;
680 const int *block_offset = &s->block_offset[0];
681 const int block_h = 16 >> 1;
683 linesize = s->cur_pic->f->linesize[0];
684 uvlinesize = s->cur_pic->f->linesize[1];
686 dest_y = s->cur_pic->f->data[0] + (mb_x + mb_y * linesize) * 16;
687 dest_cb = s->cur_pic->f->data[1] + mb_x * 8 + mb_y * uvlinesize * block_h;
688 dest_cr = s->cur_pic->f->data[2] + mb_x * 8 + mb_y * uvlinesize * block_h;
690 s->vdsp.prefetch(dest_y + (s->mb_x & 3) * 4 * linesize + 64, linesize, 4);
691 s->vdsp.prefetch(dest_cb + (s->mb_x & 7) * uvlinesize + 64, dest_cr - dest_cb, 2);
693 if (IS_INTRA(mb_type)) {
694 s->hpc.pred8x8[s->chroma_pred_mode](dest_cb, uvlinesize);
695 s->hpc.pred8x8[s->chroma_pred_mode](dest_cr, uvlinesize);
697 hl_decode_mb_predict_luma(s, mb_type, block_offset, linesize, dest_y);
700 hl_decode_mb_idct_luma(s, mb_type, block_offset, linesize, dest_y);
703 uint8_t *dest[2] = { dest_cb, dest_cr };
704 s->h264dsp.h264_chroma_dc_dequant_idct(s->mb + 16 * 16 * 1,
705 s->dequant4_coeff[4][0]);
706 s->h264dsp.h264_chroma_dc_dequant_idct(s->mb + 16 * 16 * 2,
707 s->dequant4_coeff[4][0]);
708 for (j = 1; j < 3; j++) {
709 for (i = j * 16; i < j * 16 + 4; i++)
710 if (s->non_zero_count_cache[scan8[i]] || s->mb[i * 16]) {
711 uint8_t *const ptr = dest[j - 1] + block_offset[i];
712 svq3_add_idct_c(ptr, s->mb + i * 16,
713 uvlinesize, ff_h264_chroma_qp[0][s->qscale + 12] - 12, 2);
719 static int svq3_decode_mb(SVQ3Context *s, unsigned int mb_type)
721 int i, j, k, m, dir, mode;
725 const int mb_xy = s->mb_xy;
726 const int b_xy = 4 * s->mb_x + 4 * s->mb_y * s->b_stride;
728 s->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
729 s->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
730 s->topright_samples_available = 0xFFFF;
732 if (mb_type == 0) { /* SKIP */
733 if (s->pict_type == AV_PICTURE_TYPE_P ||
734 s->next_pic->mb_type[mb_xy] == -1) {
735 svq3_mc_dir_part(s, 16 * s->mb_x, 16 * s->mb_y, 16, 16,
738 if (s->pict_type == AV_PICTURE_TYPE_B)
739 svq3_mc_dir_part(s, 16 * s->mb_x, 16 * s->mb_y, 16, 16,
742 mb_type = MB_TYPE_SKIP;
744 mb_type = FFMIN(s->next_pic->mb_type[mb_xy], 6);
745 if (svq3_mc_dir(s, mb_type, PREDICT_MODE, 0, 0) < 0)
747 if (svq3_mc_dir(s, mb_type, PREDICT_MODE, 1, 1) < 0)
750 mb_type = MB_TYPE_16x16;
752 } else if (mb_type < 8) { /* INTER */
753 if (s->thirdpel_flag && s->halfpel_flag == !get_bits1(&s->gb_slice))
754 mode = THIRDPEL_MODE;
755 else if (s->halfpel_flag &&
756 s->thirdpel_flag == !get_bits1(&s->gb_slice))
762 /* note ref_cache should contain here:
770 for (m = 0; m < 2; m++) {
771 if (s->mb_x > 0 && s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - 1] + 6] != -1) {
772 for (i = 0; i < 4; i++)
773 AV_COPY32(s->mv_cache[m][scan8[0] - 1 + i * 8],
774 s->cur_pic->motion_val[m][b_xy - 1 + i * s->b_stride]);
776 for (i = 0; i < 4; i++)
777 AV_ZERO32(s->mv_cache[m][scan8[0] - 1 + i * 8]);
780 memcpy(s->mv_cache[m][scan8[0] - 1 * 8],
781 s->cur_pic->motion_val[m][b_xy - s->b_stride],
782 4 * 2 * sizeof(int16_t));
783 memset(&s->ref_cache[m][scan8[0] - 1 * 8],
784 (s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1, 4);
786 if (s->mb_x < s->mb_width - 1) {
787 AV_COPY32(s->mv_cache[m][scan8[0] + 4 - 1 * 8],
788 s->cur_pic->motion_val[m][b_xy - s->b_stride + 4]);
789 s->ref_cache[m][scan8[0] + 4 - 1 * 8] =
790 (s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride + 1] + 6] == -1 ||
791 s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1;
793 s->ref_cache[m][scan8[0] + 4 - 1 * 8] = PART_NOT_AVAILABLE;
795 AV_COPY32(s->mv_cache[m][scan8[0] - 1 - 1 * 8],
796 s->cur_pic->motion_val[m][b_xy - s->b_stride - 1]);
797 s->ref_cache[m][scan8[0] - 1 - 1 * 8] =
798 (s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride - 1] + 3] == -1) ? PART_NOT_AVAILABLE : 1;
800 s->ref_cache[m][scan8[0] - 1 - 1 * 8] = PART_NOT_AVAILABLE;
802 memset(&s->ref_cache[m][scan8[0] - 1 * 8 - 1],
803 PART_NOT_AVAILABLE, 8);
805 if (s->pict_type != AV_PICTURE_TYPE_B)
809 /* decode motion vector(s) and form prediction(s) */
810 if (s->pict_type == AV_PICTURE_TYPE_P) {
811 if (svq3_mc_dir(s, mb_type - 1, mode, 0, 0) < 0)
813 } else { /* AV_PICTURE_TYPE_B */
815 if (svq3_mc_dir(s, 0, mode, 0, 0) < 0)
818 for (i = 0; i < 4; i++)
819 memset(s->cur_pic->motion_val[0][b_xy + i * s->b_stride],
820 0, 4 * 2 * sizeof(int16_t));
823 if (svq3_mc_dir(s, 0, mode, 1, mb_type == 3) < 0)
826 for (i = 0; i < 4; i++)
827 memset(s->cur_pic->motion_val[1][b_xy + i * s->b_stride],
828 0, 4 * 2 * sizeof(int16_t));
832 mb_type = MB_TYPE_16x16;
833 } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */
834 int8_t *i4x4 = s->intra4x4_pred_mode + s->mb2br_xy[s->mb_xy];
835 int8_t *i4x4_cache = s->intra4x4_pred_mode_cache;
837 memset(s->intra4x4_pred_mode_cache, -1, 8 * 5 * sizeof(int8_t));
841 for (i = 0; i < 4; i++)
842 s->intra4x4_pred_mode_cache[scan8[0] - 1 + i * 8] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - 1] + 6 - i];
843 if (s->intra4x4_pred_mode_cache[scan8[0] - 1] == -1)
844 s->left_samples_available = 0x5F5F;
847 s->intra4x4_pred_mode_cache[4 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 0];
848 s->intra4x4_pred_mode_cache[5 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 1];
849 s->intra4x4_pred_mode_cache[6 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 2];
850 s->intra4x4_pred_mode_cache[7 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 3];
852 if (s->intra4x4_pred_mode_cache[4 + 8 * 0] == -1)
853 s->top_samples_available = 0x33FF;
856 /* decode prediction codes for luma blocks */
857 for (i = 0; i < 16; i += 2) {
858 vlc = get_interleaved_ue_golomb(&s->gb_slice);
861 av_log(s->avctx, AV_LOG_ERROR,
862 "luma prediction:%"PRIu32"\n", vlc);
866 left = &s->intra4x4_pred_mode_cache[scan8[i] - 1];
867 top = &s->intra4x4_pred_mode_cache[scan8[i] - 8];
869 left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];
870 left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];
872 if (left[1] == -1 || left[2] == -1) {
873 av_log(s->avctx, AV_LOG_ERROR, "weird prediction\n");
877 } else { /* mb_type == 33, DC_128_PRED block type */
878 for (i = 0; i < 4; i++)
879 memset(&s->intra4x4_pred_mode_cache[scan8[0] + 8 * i], DC_PRED, 4);
882 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
883 i4x4[4] = i4x4_cache[7 + 8 * 3];
884 i4x4[5] = i4x4_cache[7 + 8 * 2];
885 i4x4[6] = i4x4_cache[7 + 8 * 1];
888 ff_h264_check_intra4x4_pred_mode(s->intra4x4_pred_mode_cache,
889 s->avctx, s->top_samples_available,
890 s->left_samples_available);
892 s->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
893 s->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
895 for (i = 0; i < 4; i++)
896 memset(&s->intra4x4_pred_mode_cache[scan8[0] + 8 * i], DC_128_PRED, 4);
898 s->top_samples_available = 0x33FF;
899 s->left_samples_available = 0x5F5F;
902 mb_type = MB_TYPE_INTRA4x4;
903 } else { /* INTRA16x16 */
904 dir = ff_h264_i_mb_type_info[mb_type - 8].pred_mode;
905 dir = (dir >> 1) ^ 3 * (dir & 1) ^ 1;
907 if ((s->intra16x16_pred_mode = ff_h264_check_intra_pred_mode(s->avctx, s->top_samples_available,
908 s->left_samples_available, dir, 0)) < 0) {
909 av_log(s->avctx, AV_LOG_ERROR, "ff_h264_check_intra_pred_mode < 0\n");
910 return s->intra16x16_pred_mode;
913 cbp = ff_h264_i_mb_type_info[mb_type - 8].cbp;
914 mb_type = MB_TYPE_INTRA16x16;
917 if (!IS_INTER(mb_type) && s->pict_type != AV_PICTURE_TYPE_I) {
918 for (i = 0; i < 4; i++)
919 memset(s->cur_pic->motion_val[0][b_xy + i * s->b_stride],
920 0, 4 * 2 * sizeof(int16_t));
921 if (s->pict_type == AV_PICTURE_TYPE_B) {
922 for (i = 0; i < 4; i++)
923 memset(s->cur_pic->motion_val[1][b_xy + i * s->b_stride],
924 0, 4 * 2 * sizeof(int16_t));
927 if (!IS_INTRA4x4(mb_type)) {
928 memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy], DC_PRED, 8);
930 if (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B) {
931 memset(s->non_zero_count_cache + 8, 0, 14 * 8 * sizeof(uint8_t));
934 if (!IS_INTRA16x16(mb_type) &&
935 (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B)) {
936 if ((vlc = get_interleaved_ue_golomb(&s->gb_slice)) >= 48U){
937 av_log(s->avctx, AV_LOG_ERROR, "cbp_vlc=%"PRIu32"\n", vlc);
941 cbp = IS_INTRA(mb_type) ? ff_h264_golomb_to_intra4x4_cbp[vlc]
942 : ff_h264_golomb_to_inter_cbp[vlc];
944 if (IS_INTRA16x16(mb_type) ||
945 (s->pict_type != AV_PICTURE_TYPE_I && s->adaptive_quant && cbp)) {
946 s->qscale += get_interleaved_se_golomb(&s->gb_slice);
948 if (s->qscale > 31u) {
949 av_log(s->avctx, AV_LOG_ERROR, "qscale:%d\n", s->qscale);
953 if (IS_INTRA16x16(mb_type)) {
954 AV_ZERO128(s->mb_luma_dc[0] + 0);
955 AV_ZERO128(s->mb_luma_dc[0] + 8);
956 if (svq3_decode_block(&s->gb_slice, s->mb_luma_dc[0], 0, 1)) {
957 av_log(s->avctx, AV_LOG_ERROR,
958 "error while decoding intra luma dc\n");
964 const int index = IS_INTRA16x16(mb_type) ? 1 : 0;
965 const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
967 for (i = 0; i < 4; i++)
968 if ((cbp & (1 << i))) {
969 for (j = 0; j < 4; j++) {
970 k = index ? (1 * (j & 1) + 2 * (i & 1) +
971 2 * (j & 2) + 4 * (i & 2))
973 s->non_zero_count_cache[scan8[k]] = 1;
975 if (svq3_decode_block(&s->gb_slice, &s->mb[16 * k], index, type)) {
976 av_log(s->avctx, AV_LOG_ERROR,
977 "error while decoding block\n");
984 for (i = 1; i < 3; ++i)
985 if (svq3_decode_block(&s->gb_slice, &s->mb[16 * 16 * i], 0, 3)) {
986 av_log(s->avctx, AV_LOG_ERROR,
987 "error while decoding chroma dc block\n");
992 for (i = 1; i < 3; i++) {
993 for (j = 0; j < 4; j++) {
995 s->non_zero_count_cache[scan8[k]] = 1;
997 if (svq3_decode_block(&s->gb_slice, &s->mb[16 * k], 1, 1)) {
998 av_log(s->avctx, AV_LOG_ERROR,
999 "error while decoding chroma ac block\n");
1009 s->cur_pic->mb_type[mb_xy] = mb_type;
1011 if (IS_INTRA(mb_type))
1012 s->chroma_pred_mode = ff_h264_check_intra_pred_mode(s->avctx, s->top_samples_available,
1013 s->left_samples_available, DC_PRED8x8, 1);
1018 static int svq3_decode_slice_header(AVCodecContext *avctx)
1020 SVQ3Context *s = avctx->priv_data;
1021 const int mb_xy = s->mb_xy;
1025 header = get_bits(&s->gb, 8);
1027 if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) {
1029 av_log(avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header);
1032 int slice_bits, slice_bytes, slice_length;
1033 int length = header >> 5 & 3;
1035 slice_length = show_bits(&s->gb, 8 * length);
1036 slice_bits = slice_length * 8;
1037 slice_bytes = slice_length + length - 1;
1039 if (8LL*slice_bytes > get_bits_left(&s->gb)) {
1040 av_log(avctx, AV_LOG_ERROR, "slice after bitstream end\n");
1044 skip_bits(&s->gb, 8);
1046 av_fast_malloc(&s->slice_buf, &s->slice_size, slice_bytes + AV_INPUT_BUFFER_PADDING_SIZE);
1048 return AVERROR(ENOMEM);
1050 memcpy(s->slice_buf, s->gb.buffer + s->gb.index / 8, slice_bytes);
1052 init_get_bits(&s->gb_slice, s->slice_buf, slice_bits);
1054 if (s->watermark_key) {
1055 uint32_t header = AV_RL32(&s->gb_slice.buffer[1]);
1056 AV_WL32(&s->gb_slice.buffer[1], header ^ s->watermark_key);
1059 memmove(s->slice_buf, &s->slice_buf[slice_length], length - 1);
1061 skip_bits_long(&s->gb, slice_bytes * 8);
1064 if ((slice_id = get_interleaved_ue_golomb(&s->gb_slice)) >= 3) {
1065 av_log(s->avctx, AV_LOG_ERROR, "illegal slice type %u \n", slice_id);
1068 if (get_bits1(&s->gb_slice)) {
1069 avpriv_report_missing_feature(s->avctx, "Media key encryption");
1070 return AVERROR_PATCHWELCOME;
1073 s->slice_type = ff_h264_golomb_to_pict_type[slice_id];
1075 if ((header & 0x9F) == 2) {
1076 i = (s->mb_num < 64) ? 5 : av_log2(s->mb_num - 1);
1077 get_bits(&s->gb_slice, i);
1080 s->slice_num = get_bits(&s->gb_slice, 8);
1081 s->qscale = get_bits(&s->gb_slice, 5);
1082 s->adaptive_quant = get_bits1(&s->gb_slice);
1084 /* unknown fields */
1085 skip_bits1(&s->gb_slice);
1087 if (s->has_watermark)
1088 skip_bits1(&s->gb_slice);
1090 skip_bits1(&s->gb_slice);
1091 skip_bits(&s->gb_slice, 2);
1093 if (skip_1stop_8data_bits(&s->gb_slice) < 0)
1094 return AVERROR_INVALIDDATA;
1096 /* reset intra predictors and invalidate motion vector references */
1098 memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - 1] + 3,
1099 -1, 4 * sizeof(int8_t));
1100 memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - s->mb_x],
1101 -1, 8 * sizeof(int8_t) * s->mb_x);
1104 memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - s->mb_stride],
1105 -1, 8 * sizeof(int8_t) * (s->mb_width - s->mb_x));
1108 s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride - 1] + 3] = -1;
1114 static void init_dequant4_coeff_table(SVQ3Context *s)
1117 const int max_qp = 51;
1119 for (q = 0; q < max_qp + 1; q++) {
1120 int shift = ff_h264_quant_div6[q] + 2;
1121 int idx = ff_h264_quant_rem6[q];
1122 for (x = 0; x < 16; x++)
1123 s->dequant4_coeff[q][(x >> 2) | ((x << 2) & 0xF)] =
1124 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] * 16) << shift;
1128 static av_cold int svq3_decode_init(AVCodecContext *avctx)
1130 SVQ3Context *s = avctx->priv_data;
1132 unsigned char *extradata;
1133 unsigned char *extradata_end;
1135 int marker_found = 0;
1138 s->cur_pic = av_mallocz(sizeof(*s->cur_pic));
1139 s->last_pic = av_mallocz(sizeof(*s->last_pic));
1140 s->next_pic = av_mallocz(sizeof(*s->next_pic));
1141 if (!s->next_pic || !s->last_pic || !s->cur_pic) {
1142 ret = AVERROR(ENOMEM);
1146 s->cur_pic->f = av_frame_alloc();
1147 s->last_pic->f = av_frame_alloc();
1148 s->next_pic->f = av_frame_alloc();
1149 if (!s->cur_pic->f || !s->last_pic->f || !s->next_pic->f)
1150 return AVERROR(ENOMEM);
1152 ff_h264dsp_init(&s->h264dsp, 8, 1);
1153 ff_h264_pred_init(&s->hpc, AV_CODEC_ID_SVQ3, 8, 1);
1154 ff_videodsp_init(&s->vdsp, 8);
1157 avctx->bits_per_raw_sample = 8;
1159 ff_hpeldsp_init(&s->hdsp, avctx->flags);
1160 ff_tpeldsp_init(&s->tdsp);
1162 avctx->pix_fmt = AV_PIX_FMT_YUVJ420P;
1163 avctx->color_range = AVCOL_RANGE_JPEG;
1166 s->halfpel_flag = 1;
1167 s->thirdpel_flag = 1;
1168 s->has_watermark = 0;
1170 /* prowl for the "SEQH" marker in the extradata */
1171 extradata = (unsigned char *)avctx->extradata;
1172 extradata_end = avctx->extradata + avctx->extradata_size;
1174 for (m = 0; m + 8 < avctx->extradata_size; m++) {
1175 if (!memcmp(extradata, "SEQH", 4)) {
1183 /* if a match was found, parse the extra data */
1186 int frame_size_code;
1187 int unk0, unk1, unk2, unk3, unk4;
1189 size = AV_RB32(&extradata[4]);
1190 if (size > extradata_end - extradata - 8) {
1191 ret = AVERROR_INVALIDDATA;
1194 init_get_bits(&gb, extradata + 8, size * 8);
1196 /* 'frame size code' and optional 'width, height' */
1197 frame_size_code = get_bits(&gb, 3);
1198 switch (frame_size_code) {
1201 avctx->height = 120;
1209 avctx->height = 144;
1213 avctx->height = 288;
1217 avctx->height = 576;
1221 avctx->height = 180;
1225 avctx->height = 240;
1228 avctx->width = get_bits(&gb, 12);
1229 avctx->height = get_bits(&gb, 12);
1233 s->halfpel_flag = get_bits1(&gb);
1234 s->thirdpel_flag = get_bits1(&gb);
1236 /* unknown fields */
1237 unk0 = get_bits1(&gb);
1238 unk1 = get_bits1(&gb);
1239 unk2 = get_bits1(&gb);
1240 unk3 = get_bits1(&gb);
1242 s->low_delay = get_bits1(&gb);
1245 unk4 = get_bits1(&gb);
1247 av_log(avctx, AV_LOG_DEBUG, "Unknown fields %d %d %d %d %d\n",
1248 unk0, unk1, unk2, unk3, unk4);
1250 if (skip_1stop_8data_bits(&gb) < 0) {
1251 ret = AVERROR_INVALIDDATA;
1255 s->has_watermark = get_bits1(&gb);
1256 avctx->has_b_frames = !s->low_delay;
1257 if (s->has_watermark) {
1259 unsigned watermark_width = get_interleaved_ue_golomb(&gb);
1260 unsigned watermark_height = get_interleaved_ue_golomb(&gb);
1261 int u1 = get_interleaved_ue_golomb(&gb);
1262 int u2 = get_bits(&gb, 8);
1263 int u3 = get_bits(&gb, 2);
1264 int u4 = get_interleaved_ue_golomb(&gb);
1265 unsigned long buf_len = watermark_width *
1266 watermark_height * 4;
1267 int offset = get_bits_count(&gb) + 7 >> 3;
1270 if (watermark_height <= 0 ||
1271 (uint64_t)watermark_width * 4 > UINT_MAX / watermark_height) {
1276 buf = av_malloc(buf_len);
1278 ret = AVERROR(ENOMEM);
1281 av_log(avctx, AV_LOG_DEBUG, "watermark size: %ux%u\n",
1282 watermark_width, watermark_height);
1283 av_log(avctx, AV_LOG_DEBUG,
1284 "u1: %x u2: %x u3: %x compressed data size: %d offset: %d\n",
1285 u1, u2, u3, u4, offset);
1286 if (uncompress(buf, &buf_len, extradata + 8 + offset,
1287 size - offset) != Z_OK) {
1288 av_log(avctx, AV_LOG_ERROR,
1289 "could not uncompress watermark logo\n");
1294 s->watermark_key = ff_svq1_packet_checksum(buf, buf_len, 0);
1295 s->watermark_key = s->watermark_key << 16 | s->watermark_key;
1296 av_log(avctx, AV_LOG_DEBUG,
1297 "watermark key %#"PRIx32"\n", s->watermark_key);
1300 av_log(avctx, AV_LOG_ERROR,
1301 "this svq3 file contains watermark which need zlib support compiled in\n");
1308 s->mb_width = (avctx->width + 15) / 16;
1309 s->mb_height = (avctx->height + 15) / 16;
1310 s->mb_stride = s->mb_width + 1;
1311 s->mb_num = s->mb_width * s->mb_height;
1312 s->b_stride = 4 * s->mb_width;
1313 s->h_edge_pos = s->mb_width * 16;
1314 s->v_edge_pos = s->mb_height * 16;
1316 s->intra4x4_pred_mode = av_mallocz(s->mb_stride * 2 * 8);
1317 if (!s->intra4x4_pred_mode)
1318 return AVERROR(ENOMEM);
1320 s->mb2br_xy = av_mallocz(s->mb_stride * (s->mb_height + 1) *
1321 sizeof(*s->mb2br_xy));
1323 return AVERROR(ENOMEM);
1325 for (y = 0; y < s->mb_height; y++)
1326 for (x = 0; x < s->mb_width; x++) {
1327 const int mb_xy = x + y * s->mb_stride;
1329 s->mb2br_xy[mb_xy] = 8 * (mb_xy % (2 * s->mb_stride));
1332 init_dequant4_coeff_table(s);
1336 svq3_decode_end(avctx);
1340 static void free_picture(AVCodecContext *avctx, SVQ3Frame *pic)
1343 for (i = 0; i < 2; i++) {
1344 av_buffer_unref(&pic->motion_val_buf[i]);
1345 av_buffer_unref(&pic->ref_index_buf[i]);
1347 av_buffer_unref(&pic->mb_type_buf);
1349 av_frame_unref(pic->f);
1352 static int get_buffer(AVCodecContext *avctx, SVQ3Frame *pic)
1354 SVQ3Context *s = avctx->priv_data;
1355 const int big_mb_num = s->mb_stride * (s->mb_height + 1) + 1;
1356 const int mb_array_size = s->mb_stride * s->mb_height;
1357 const int b4_stride = s->mb_width * 4 + 1;
1358 const int b4_array_size = b4_stride * s->mb_height * 4;
1361 if (!pic->motion_val_buf[0]) {
1364 pic->mb_type_buf = av_buffer_allocz((big_mb_num + s->mb_stride) * sizeof(uint32_t));
1365 if (!pic->mb_type_buf)
1366 return AVERROR(ENOMEM);
1367 pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * s->mb_stride + 1;
1369 for (i = 0; i < 2; i++) {
1370 pic->motion_val_buf[i] = av_buffer_allocz(2 * (b4_array_size + 4) * sizeof(int16_t));
1371 pic->ref_index_buf[i] = av_buffer_allocz(4 * mb_array_size);
1372 if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i]) {
1373 ret = AVERROR(ENOMEM);
1377 pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
1378 pic->ref_index[i] = pic->ref_index_buf[i]->data;
1382 ret = ff_get_buffer(avctx, pic->f,
1383 (s->pict_type != AV_PICTURE_TYPE_B) ?
1384 AV_GET_BUFFER_FLAG_REF : 0);
1388 if (!s->edge_emu_buffer) {
1389 s->edge_emu_buffer = av_mallocz_array(pic->f->linesize[0], 17);
1390 if (!s->edge_emu_buffer)
1391 return AVERROR(ENOMEM);
1396 free_picture(avctx, pic);
1400 static int svq3_decode_frame(AVCodecContext *avctx, void *data,
1401 int *got_frame, AVPacket *avpkt)
1403 SVQ3Context *s = avctx->priv_data;
1404 int buf_size = avpkt->size;
1409 /* special case for last picture */
1410 if (buf_size == 0) {
1411 if (s->next_pic->f->data[0] && !s->low_delay && !s->last_frame_output) {
1412 ret = av_frame_ref(data, s->next_pic->f);
1415 s->last_frame_output = 1;
1421 s->mb_x = s->mb_y = s->mb_xy = 0;
1423 if (s->watermark_key) {
1424 av_fast_padded_malloc(&s->buf, &s->buf_size, buf_size);
1426 return AVERROR(ENOMEM);
1427 memcpy(s->buf, avpkt->data, buf_size);
1433 ret = init_get_bits(&s->gb, buf, 8 * buf_size);
1437 if (svq3_decode_slice_header(avctx))
1440 s->pict_type = s->slice_type;
1442 if (s->pict_type != AV_PICTURE_TYPE_B)
1443 FFSWAP(SVQ3Frame*, s->next_pic, s->last_pic);
1445 av_frame_unref(s->cur_pic->f);
1447 /* for skipping the frame */
1448 s->cur_pic->f->pict_type = s->pict_type;
1449 s->cur_pic->f->key_frame = (s->pict_type == AV_PICTURE_TYPE_I);
1451 ret = get_buffer(avctx, s->cur_pic);
1455 for (i = 0; i < 16; i++) {
1456 s->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 4 * s->cur_pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
1457 s->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 8 * s->cur_pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
1459 for (i = 0; i < 16; i++) {
1460 s->block_offset[16 + i] =
1461 s->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 4 * s->cur_pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
1462 s->block_offset[48 + 16 + i] =
1463 s->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 8 * s->cur_pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
1466 if (s->pict_type != AV_PICTURE_TYPE_I) {
1467 if (!s->last_pic->f->data[0]) {
1468 av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
1469 av_frame_unref(s->last_pic->f);
1470 ret = get_buffer(avctx, s->last_pic);
1473 memset(s->last_pic->f->data[0], 0, avctx->height * s->last_pic->f->linesize[0]);
1474 memset(s->last_pic->f->data[1], 0x80, (avctx->height / 2) *
1475 s->last_pic->f->linesize[1]);
1476 memset(s->last_pic->f->data[2], 0x80, (avctx->height / 2) *
1477 s->last_pic->f->linesize[2]);
1480 if (s->pict_type == AV_PICTURE_TYPE_B && !s->next_pic->f->data[0]) {
1481 av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
1482 av_frame_unref(s->next_pic->f);
1483 ret = get_buffer(avctx, s->next_pic);
1486 memset(s->next_pic->f->data[0], 0, avctx->height * s->next_pic->f->linesize[0]);
1487 memset(s->next_pic->f->data[1], 0x80, (avctx->height / 2) *
1488 s->next_pic->f->linesize[1]);
1489 memset(s->next_pic->f->data[2], 0x80, (avctx->height / 2) *
1490 s->next_pic->f->linesize[2]);
1494 if (avctx->debug & FF_DEBUG_PICT_INFO)
1495 av_log(s->avctx, AV_LOG_DEBUG,
1496 "%c hpel:%d, tpel:%d aqp:%d qp:%d, slice_num:%02X\n",
1497 av_get_picture_type_char(s->pict_type),
1498 s->halfpel_flag, s->thirdpel_flag,
1499 s->adaptive_quant, s->qscale, s->slice_num);
1501 if (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B ||
1502 avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I ||
1503 avctx->skip_frame >= AVDISCARD_ALL)
1506 if (s->next_p_frame_damaged) {
1507 if (s->pict_type == AV_PICTURE_TYPE_B)
1510 s->next_p_frame_damaged = 0;
1513 if (s->pict_type == AV_PICTURE_TYPE_B) {
1514 s->frame_num_offset = s->slice_num - s->prev_frame_num;
1516 if (s->frame_num_offset < 0)
1517 s->frame_num_offset += 256;
1518 if (s->frame_num_offset == 0 ||
1519 s->frame_num_offset >= s->prev_frame_num_offset) {
1520 av_log(s->avctx, AV_LOG_ERROR, "error in B-frame picture id\n");
1524 s->prev_frame_num = s->frame_num;
1525 s->frame_num = s->slice_num;
1526 s->prev_frame_num_offset = s->frame_num - s->prev_frame_num;
1528 if (s->prev_frame_num_offset < 0)
1529 s->prev_frame_num_offset += 256;
1532 for (m = 0; m < 2; m++) {
1534 for (i = 0; i < 4; i++) {
1536 for (j = -1; j < 4; j++)
1537 s->ref_cache[m][scan8[0] + 8 * i + j] = 1;
1539 s->ref_cache[m][scan8[0] + 8 * i + j] = PART_NOT_AVAILABLE;
1543 for (s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
1544 for (s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
1546 s->mb_xy = s->mb_x + s->mb_y * s->mb_stride;
1548 if ((get_bits_left(&s->gb_slice)) <= 7) {
1549 if (((get_bits_count(&s->gb_slice) & 7) == 0 ||
1550 show_bits(&s->gb_slice, get_bits_left(&s->gb_slice) & 7) == 0)) {
1552 if (svq3_decode_slice_header(avctx))
1555 if (s->slice_type != s->pict_type) {
1556 avpriv_request_sample(avctx, "non constant slice type");
1558 /* TODO: support s->mb_skip_run */
1561 mb_type = get_interleaved_ue_golomb(&s->gb_slice);
1563 if (s->pict_type == AV_PICTURE_TYPE_I)
1565 else if (s->pict_type == AV_PICTURE_TYPE_B && mb_type >= 4)
1567 if (mb_type > 33 || svq3_decode_mb(s, mb_type)) {
1568 av_log(s->avctx, AV_LOG_ERROR,
1569 "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
1573 if (mb_type != 0 || s->cbp)
1576 if (s->pict_type != AV_PICTURE_TYPE_B && !s->low_delay)
1577 s->cur_pic->mb_type[s->mb_x + s->mb_y * s->mb_stride] =
1578 (s->pict_type == AV_PICTURE_TYPE_P && mb_type < 8) ? (mb_type - 1) : -1;
1581 ff_draw_horiz_band(avctx, s->cur_pic->f,
1582 s->last_pic->f->data[0] ? s->last_pic->f : NULL,
1583 16 * s->mb_y, 16, PICT_FRAME, 0,
1587 left = buf_size*8 - get_bits_count(&s->gb_slice);
1589 if (s->mb_y != s->mb_height || s->mb_x != s->mb_width) {
1590 av_log(avctx, AV_LOG_INFO, "frame num %d incomplete pic x %d y %d left %d\n", avctx->frame_number, s->mb_y, s->mb_x, left);
1591 //av_hex_dump(stderr, buf+buf_size-8, 8);
1595 av_log(avctx, AV_LOG_ERROR, "frame num %d left %d\n", avctx->frame_number, left);
1599 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)
1600 ret = av_frame_ref(data, s->cur_pic->f);
1601 else if (s->last_pic->f->data[0])
1602 ret = av_frame_ref(data, s->last_pic->f);
1606 /* Do not output the last pic after seeking. */
1607 if (s->last_pic->f->data[0] || s->low_delay)
1610 if (s->pict_type != AV_PICTURE_TYPE_B) {
1611 FFSWAP(SVQ3Frame*, s->cur_pic, s->next_pic);
1613 av_frame_unref(s->cur_pic->f);
1619 static av_cold int svq3_decode_end(AVCodecContext *avctx)
1621 SVQ3Context *s = avctx->priv_data;
1623 free_picture(avctx, s->cur_pic);
1624 free_picture(avctx, s->next_pic);
1625 free_picture(avctx, s->last_pic);
1626 av_frame_free(&s->cur_pic->f);
1627 av_frame_free(&s->next_pic->f);
1628 av_frame_free(&s->last_pic->f);
1629 av_freep(&s->cur_pic);
1630 av_freep(&s->next_pic);
1631 av_freep(&s->last_pic);
1632 av_freep(&s->slice_buf);
1633 av_freep(&s->intra4x4_pred_mode);
1634 av_freep(&s->edge_emu_buffer);
1635 av_freep(&s->mb2br_xy);
1644 AVCodec ff_svq3_decoder = {
1646 .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3"),
1647 .type = AVMEDIA_TYPE_VIDEO,
1648 .id = AV_CODEC_ID_SVQ3,
1649 .priv_data_size = sizeof(SVQ3Context),
1650 .init = svq3_decode_init,
1651 .close = svq3_decode_end,
1652 .decode = svq3_decode_frame,
1653 .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND |
1656 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P,