h264: move the DPB init/uninit to init_context()/free_context()
[libav.git] / libavcodec / h264_slice.c
1 /*
2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/timer.h"
31 #include "internal.h"
32 #include "cabac.h"
33 #include "cabac_functions.h"
34 #include "error_resilience.h"
35 #include "avcodec.h"
36 #include "h264.h"
37 #include "h264data.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
40 #include "golomb.h"
41 #include "mathops.h"
42 #include "mpegutils.h"
43 #include "rectangle.h"
44 #include "thread.h"
45
46
47 static const uint8_t rem6[QP_MAX_NUM + 1] = {
48 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
49 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
50 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
51 };
52
53 static const uint8_t div6[QP_MAX_NUM + 1] = {
54 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
55 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
56 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
57 };
58
59 static const uint8_t field_scan[16] = {
60 0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
61 0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
62 2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
63 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
64 };
65
66 static const uint8_t field_scan8x8[64] = {
67 0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
68 1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
69 2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
70 0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
71 2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
72 2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
73 2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
74 3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
75 3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
76 4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
77 4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
78 5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
79 5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
80 7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
81 6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
82 7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
83 };
84
85 static const uint8_t field_scan8x8_cavlc[64] = {
86 0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
87 2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
88 3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
89 5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
90 0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
91 1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
92 3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
93 5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
94 0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
95 1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
96 3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
97 5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
98 1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
99 1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
100 3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
101 6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
102 };
103
104 // zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
105 static const uint8_t zigzag_scan8x8_cavlc[64] = {
106 0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
107 4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
108 3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
109 2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
110 1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
111 3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
112 2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
113 3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
114 0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
115 2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
116 1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
117 4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
118 0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
119 1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
120 0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
121 5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
122 };
123
124 static const uint8_t dequant4_coeff_init[6][3] = {
125 { 10, 13, 16 },
126 { 11, 14, 18 },
127 { 13, 16, 20 },
128 { 14, 18, 23 },
129 { 16, 20, 25 },
130 { 18, 23, 29 },
131 };
132
133 static const uint8_t dequant8_coeff_init_scan[16] = {
134 0, 3, 4, 3, 3, 1, 5, 1, 4, 5, 2, 5, 3, 1, 5, 1
135 };
136
137 static const uint8_t dequant8_coeff_init[6][6] = {
138 { 20, 18, 32, 19, 25, 24 },
139 { 22, 19, 35, 21, 28, 26 },
140 { 26, 23, 42, 24, 33, 31 },
141 { 28, 25, 45, 26, 35, 33 },
142 { 32, 28, 51, 30, 40, 38 },
143 { 36, 32, 58, 34, 46, 43 },
144 };
145
146
147 static void release_unused_pictures(H264Context *h, int remove_current)
148 {
149 int i;
150
151 /* release non reference frames */
152 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
153 if (h->DPB[i].f.buf[0] && !h->DPB[i].reference &&
154 (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
155 ff_h264_unref_picture(h, &h->DPB[i]);
156 }
157 }
158 }
159
160 static int alloc_scratch_buffers(H264SliceContext *sl, int linesize)
161 {
162 const H264Context *h = sl->h264;
163 int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
164
165 av_fast_malloc(&sl->bipred_scratchpad, &sl->bipred_scratchpad_allocated, 16 * 6 * alloc_size);
166 // edge emu needs blocksize + filter length - 1
167 // (= 21x21 for h264)
168 av_fast_malloc(&sl->edge_emu_buffer, &sl->edge_emu_buffer_allocated, alloc_size * 2 * 21);
169
170 av_fast_malloc(&sl->top_borders[0], &sl->top_borders_allocated[0],
171 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
172 av_fast_malloc(&sl->top_borders[1], &sl->top_borders_allocated[1],
173 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
174
175 if (!sl->bipred_scratchpad || !sl->edge_emu_buffer ||
176 !sl->top_borders[0] || !sl->top_borders[1]) {
177 av_freep(&sl->bipred_scratchpad);
178 av_freep(&sl->edge_emu_buffer);
179 av_freep(&sl->top_borders[0]);
180 av_freep(&sl->top_borders[1]);
181
182 sl->bipred_scratchpad_allocated = 0;
183 sl->edge_emu_buffer_allocated = 0;
184 sl->top_borders_allocated[0] = 0;
185 sl->top_borders_allocated[1] = 0;
186 return AVERROR(ENOMEM);
187 }
188
189 return 0;
190 }
191
192 static int init_table_pools(H264Context *h)
193 {
194 const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
195 const int mb_array_size = h->mb_stride * h->mb_height;
196 const int b4_stride = h->mb_width * 4 + 1;
197 const int b4_array_size = b4_stride * h->mb_height * 4;
198
199 h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
200 av_buffer_allocz);
201 h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
202 sizeof(uint32_t), av_buffer_allocz);
203 h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
204 sizeof(int16_t), av_buffer_allocz);
205 h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
206
207 if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
208 !h->ref_index_pool) {
209 av_buffer_pool_uninit(&h->qscale_table_pool);
210 av_buffer_pool_uninit(&h->mb_type_pool);
211 av_buffer_pool_uninit(&h->motion_val_pool);
212 av_buffer_pool_uninit(&h->ref_index_pool);
213 return AVERROR(ENOMEM);
214 }
215
216 return 0;
217 }
218
219 static int alloc_picture(H264Context *h, H264Picture *pic)
220 {
221 int i, ret = 0;
222
223 av_assert0(!pic->f.data[0]);
224
225 pic->tf.f = &pic->f;
226 ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
227 AV_GET_BUFFER_FLAG_REF : 0);
228 if (ret < 0)
229 goto fail;
230
231 if (h->avctx->hwaccel) {
232 const AVHWAccel *hwaccel = h->avctx->hwaccel;
233 av_assert0(!pic->hwaccel_picture_private);
234 if (hwaccel->frame_priv_data_size) {
235 pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
236 if (!pic->hwaccel_priv_buf)
237 return AVERROR(ENOMEM);
238 pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
239 }
240 }
241
242 if (!h->qscale_table_pool) {
243 ret = init_table_pools(h);
244 if (ret < 0)
245 goto fail;
246 }
247
248 pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
249 pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
250 if (!pic->qscale_table_buf || !pic->mb_type_buf)
251 goto fail;
252
253 pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
254 pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
255
256 for (i = 0; i < 2; i++) {
257 pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
258 pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
259 if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
260 goto fail;
261
262 pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
263 pic->ref_index[i] = pic->ref_index_buf[i]->data;
264 }
265
266 return 0;
267 fail:
268 ff_h264_unref_picture(h, pic);
269 return (ret < 0) ? ret : AVERROR(ENOMEM);
270 }
271
272 static inline int pic_is_unused(H264Context *h, H264Picture *pic)
273 {
274 if (!pic->f.buf[0])
275 return 1;
276 return 0;
277 }
278
279 static int find_unused_picture(H264Context *h)
280 {
281 int i;
282
283 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
284 if (pic_is_unused(h, &h->DPB[i]))
285 break;
286 }
287 if (i == H264_MAX_PICTURE_COUNT)
288 return AVERROR_INVALIDDATA;
289
290 return i;
291 }
292
293
294 static void init_dequant8_coeff_table(H264Context *h)
295 {
296 int i, j, q, x;
297 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
298
299 for (i = 0; i < 6; i++) {
300 h->dequant8_coeff[i] = h->dequant8_buffer[i];
301 for (j = 0; j < i; j++)
302 if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
303 64 * sizeof(uint8_t))) {
304 h->dequant8_coeff[i] = h->dequant8_buffer[j];
305 break;
306 }
307 if (j < i)
308 continue;
309
310 for (q = 0; q < max_qp + 1; q++) {
311 int shift = div6[q];
312 int idx = rem6[q];
313 for (x = 0; x < 64; x++)
314 h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
315 ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
316 h->pps.scaling_matrix8[i][x]) << shift;
317 }
318 }
319 }
320
321 static void init_dequant4_coeff_table(H264Context *h)
322 {
323 int i, j, q, x;
324 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
325 for (i = 0; i < 6; i++) {
326 h->dequant4_coeff[i] = h->dequant4_buffer[i];
327 for (j = 0; j < i; j++)
328 if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
329 16 * sizeof(uint8_t))) {
330 h->dequant4_coeff[i] = h->dequant4_buffer[j];
331 break;
332 }
333 if (j < i)
334 continue;
335
336 for (q = 0; q < max_qp + 1; q++) {
337 int shift = div6[q] + 2;
338 int idx = rem6[q];
339 for (x = 0; x < 16; x++)
340 h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
341 ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
342 h->pps.scaling_matrix4[i][x]) << shift;
343 }
344 }
345 }
346
347 void h264_init_dequant_tables(H264Context *h)
348 {
349 int i, x;
350 init_dequant4_coeff_table(h);
351 if (h->pps.transform_8x8_mode)
352 init_dequant8_coeff_table(h);
353 if (h->sps.transform_bypass) {
354 for (i = 0; i < 6; i++)
355 for (x = 0; x < 16; x++)
356 h->dequant4_coeff[i][0][x] = 1 << 6;
357 if (h->pps.transform_8x8_mode)
358 for (i = 0; i < 6; i++)
359 for (x = 0; x < 64; x++)
360 h->dequant8_coeff[i][0][x] = 1 << 6;
361 }
362 }
363
364 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
365
366 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
367 ((pic && pic >= old_ctx->DPB && \
368 pic < old_ctx->DPB + H264_MAX_PICTURE_COUNT) ? \
369 &new_ctx->DPB[pic - old_ctx->DPB] : NULL)
370
371 static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
372 H264Context *new_base,
373 H264Context *old_base)
374 {
375 int i;
376
377 for (i = 0; i < count; i++) {
378 assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
379 IN_RANGE(from[i], old_base->DPB,
380 sizeof(H264Picture) * H264_MAX_PICTURE_COUNT) ||
381 !from[i]));
382 to[i] = REBASE_PICTURE(from[i], new_base, old_base);
383 }
384 }
385
386 static int copy_parameter_set(void **to, void **from, int count, int size)
387 {
388 int i;
389
390 for (i = 0; i < count; i++) {
391 if (to[i] && !from[i]) {
392 av_freep(&to[i]);
393 } else if (from[i] && !to[i]) {
394 to[i] = av_malloc(size);
395 if (!to[i])
396 return AVERROR(ENOMEM);
397 }
398
399 if (from[i])
400 memcpy(to[i], from[i], size);
401 }
402
403 return 0;
404 }
405
406 #define copy_fields(to, from, start_field, end_field) \
407 memcpy(&to->start_field, &from->start_field, \
408 (char *)&to->end_field - (char *)&to->start_field)
409
410 static int h264_slice_header_init(H264Context *h, int reinit);
411
412 int ff_h264_update_thread_context(AVCodecContext *dst,
413 const AVCodecContext *src)
414 {
415 H264Context *h = dst->priv_data, *h1 = src->priv_data;
416 int inited = h->context_initialized, err = 0;
417 int context_reinitialized = 0;
418 int i, ret;
419
420 if (dst == src || !h1->context_initialized)
421 return 0;
422
423 if (inited &&
424 (h->width != h1->width ||
425 h->height != h1->height ||
426 h->mb_width != h1->mb_width ||
427 h->mb_height != h1->mb_height ||
428 h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
429 h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
430 h->sps.colorspace != h1->sps.colorspace)) {
431
432 /* set bits_per_raw_sample to the previous value. the check for changed
433 * bit depth in h264_set_parameter_from_sps() uses it and sets it to
434 * the current value */
435 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
436
437 h->width = h1->width;
438 h->height = h1->height;
439 h->mb_height = h1->mb_height;
440 h->mb_width = h1->mb_width;
441 h->mb_num = h1->mb_num;
442 h->mb_stride = h1->mb_stride;
443 h->b_stride = h1->b_stride;
444
445 if ((err = h264_slice_header_init(h, 1)) < 0) {
446 av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed");
447 return err;
448 }
449 context_reinitialized = 1;
450
451 /* copy block_offset since frame_start may not be called */
452 memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
453 }
454
455 if (!inited) {
456 H264SliceContext *orig_slice_ctx = h->slice_ctx;
457 H264Picture *orig_DPB = h->DPB;
458
459 for (i = 0; i < MAX_SPS_COUNT; i++)
460 av_freep(h->sps_buffers + i);
461
462 for (i = 0; i < MAX_PPS_COUNT; i++)
463 av_freep(h->pps_buffers + i);
464
465 memcpy(h, h1, sizeof(*h1));
466 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
467 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
468 h->context_initialized = 0;
469
470 memset(&h->cur_pic, 0, sizeof(h->cur_pic));
471 av_frame_unref(&h->cur_pic.f);
472 h->cur_pic.tf.f = &h->cur_pic.f;
473
474 h->slice_ctx = orig_slice_ctx;
475 h->DPB = orig_DPB;
476
477 memset(&h->slice_ctx[0].er, 0, sizeof(h->slice_ctx[0].er));
478 memset(&h->slice_ctx[0].mb, 0, sizeof(h->slice_ctx[0].mb));
479 memset(&h->slice_ctx[0].mb_luma_dc, 0, sizeof(h->slice_ctx[0].mb_luma_dc));
480 memset(&h->slice_ctx[0].mb_padding, 0, sizeof(h->slice_ctx[0].mb_padding));
481
482 h->avctx = dst;
483 h->qscale_table_pool = NULL;
484 h->mb_type_pool = NULL;
485 h->ref_index_pool = NULL;
486 h->motion_val_pool = NULL;
487
488 ret = ff_h264_alloc_tables(h);
489 if (ret < 0) {
490 av_log(dst, AV_LOG_ERROR, "Could not allocate memory\n");
491 return ret;
492 }
493 ret = ff_h264_slice_context_init(h, &h->slice_ctx[0]);
494 if (ret < 0) {
495 av_log(dst, AV_LOG_ERROR, "context_init() failed.\n");
496 return ret;
497 }
498
499 h->context_initialized = 1;
500 }
501
502 h->avctx->coded_height = h1->avctx->coded_height;
503 h->avctx->coded_width = h1->avctx->coded_width;
504 h->avctx->width = h1->avctx->width;
505 h->avctx->height = h1->avctx->height;
506 h->coded_picture_number = h1->coded_picture_number;
507 h->first_field = h1->first_field;
508 h->picture_structure = h1->picture_structure;
509 h->droppable = h1->droppable;
510 h->low_delay = h1->low_delay;
511
512 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
513 ff_h264_unref_picture(h, &h->DPB[i]);
514 if (h1->DPB[i].f.buf[0] &&
515 (ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
516 return ret;
517 }
518
519 h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
520 ff_h264_unref_picture(h, &h->cur_pic);
521 if (h1->cur_pic.f.buf[0]) {
522 ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic);
523 if (ret < 0)
524 return ret;
525 }
526
527 h->enable_er = h1->enable_er;
528 h->workaround_bugs = h1->workaround_bugs;
529 h->low_delay = h1->low_delay;
530 h->droppable = h1->droppable;
531
532 // extradata/NAL handling
533 h->is_avc = h1->is_avc;
534
535 // SPS/PPS
536 if ((ret = copy_parameter_set((void **)h->sps_buffers,
537 (void **)h1->sps_buffers,
538 MAX_SPS_COUNT, sizeof(SPS))) < 0)
539 return ret;
540 h->sps = h1->sps;
541 if ((ret = copy_parameter_set((void **)h->pps_buffers,
542 (void **)h1->pps_buffers,
543 MAX_PPS_COUNT, sizeof(PPS))) < 0)
544 return ret;
545 h->pps = h1->pps;
546
547 // Dequantization matrices
548 // FIXME these are big - can they be only copied when PPS changes?
549 copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
550
551 for (i = 0; i < 6; i++)
552 h->dequant4_coeff[i] = h->dequant4_buffer[0] +
553 (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
554
555 for (i = 0; i < 6; i++)
556 h->dequant8_coeff[i] = h->dequant8_buffer[0] +
557 (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
558
559 h->dequant_coeff_pps = h1->dequant_coeff_pps;
560
561 // POC timing
562 copy_fields(h, h1, poc_lsb, default_ref_list);
563
564 // reference lists
565 copy_fields(h, h1, short_ref, current_slice);
566
567 copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
568 copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
569 copy_picture_range(h->delayed_pic, h1->delayed_pic,
570 MAX_DELAYED_PIC_COUNT + 2, h, h1);
571
572 h->last_slice_type = h1->last_slice_type;
573
574 if (context_reinitialized)
575 ff_h264_set_parameter_from_sps(h);
576
577 if (!h->cur_pic_ptr)
578 return 0;
579
580 if (!h->droppable) {
581 err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
582 h->prev_poc_msb = h->poc_msb;
583 h->prev_poc_lsb = h->poc_lsb;
584 }
585 h->prev_frame_num_offset = h->frame_num_offset;
586 h->prev_frame_num = h->frame_num;
587
588 h->recovery_frame = h1->recovery_frame;
589 h->frame_recovered = h1->frame_recovered;
590
591 return err;
592 }
593
594 static int h264_frame_start(H264Context *h)
595 {
596 H264Picture *pic;
597 int i, ret;
598 const int pixel_shift = h->pixel_shift;
599
600 release_unused_pictures(h, 1);
601 h->cur_pic_ptr = NULL;
602
603 i = find_unused_picture(h);
604 if (i < 0) {
605 av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
606 return i;
607 }
608 pic = &h->DPB[i];
609
610 pic->reference = h->droppable ? 0 : h->picture_structure;
611 pic->f.coded_picture_number = h->coded_picture_number++;
612 pic->field_picture = h->picture_structure != PICT_FRAME;
613 /*
614 * Zero key_frame here; IDR markings per slice in frame or fields are ORed
615 * in later.
616 * See decode_nal_units().
617 */
618 pic->f.key_frame = 0;
619 pic->mmco_reset = 0;
620 pic->recovered = 0;
621
622 if ((ret = alloc_picture(h, pic)) < 0)
623 return ret;
624
625 h->cur_pic_ptr = pic;
626 ff_h264_unref_picture(h, &h->cur_pic);
627 if ((ret = ff_h264_ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
628 return ret;
629
630 if (CONFIG_ERROR_RESILIENCE && h->enable_er)
631 ff_er_frame_start(&h->slice_ctx[0].er);
632
633 for (i = 0; i < 16; i++) {
634 h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f.linesize[0] * ((scan8[i] - scan8[0]) >> 3);
635 h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f.linesize[0] * ((scan8[i] - scan8[0]) >> 3);
636 }
637 for (i = 0; i < 16; i++) {
638 h->block_offset[16 + i] =
639 h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f.linesize[1] * ((scan8[i] - scan8[0]) >> 3);
640 h->block_offset[48 + 16 + i] =
641 h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f.linesize[1] * ((scan8[i] - scan8[0]) >> 3);
642 }
643
644 /* Some macroblocks can be accessed before they're available in case
645 * of lost slices, MBAFF or threading. */
646 memset(h->slice_table, -1,
647 (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
648
649 /* We mark the current picture as non-reference after allocating it, so
650 * that if we break out due to an error it can be released automatically
651 * in the next ff_mpv_frame_start().
652 */
653 h->cur_pic_ptr->reference = 0;
654
655 h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
656
657 h->next_output_pic = NULL;
658
659 assert(h->cur_pic_ptr->long_ref == 0);
660
661 return 0;
662 }
663
664 static av_always_inline void backup_mb_border(const H264Context *h, H264SliceContext *sl,
665 uint8_t *src_y,
666 uint8_t *src_cb, uint8_t *src_cr,
667 int linesize, int uvlinesize,
668 int simple)
669 {
670 uint8_t *top_border;
671 int top_idx = 1;
672 const int pixel_shift = h->pixel_shift;
673 int chroma444 = CHROMA444(h);
674 int chroma422 = CHROMA422(h);
675
676 src_y -= linesize;
677 src_cb -= uvlinesize;
678 src_cr -= uvlinesize;
679
680 if (!simple && FRAME_MBAFF(h)) {
681 if (sl->mb_y & 1) {
682 if (!MB_MBAFF(sl)) {
683 top_border = sl->top_borders[0][sl->mb_x];
684 AV_COPY128(top_border, src_y + 15 * linesize);
685 if (pixel_shift)
686 AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
687 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
688 if (chroma444) {
689 if (pixel_shift) {
690 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
691 AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
692 AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
693 AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
694 } else {
695 AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
696 AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
697 }
698 } else if (chroma422) {
699 if (pixel_shift) {
700 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
701 AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
702 } else {
703 AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
704 AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
705 }
706 } else {
707 if (pixel_shift) {
708 AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
709 AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
710 } else {
711 AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
712 AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
713 }
714 }
715 }
716 }
717 } else if (MB_MBAFF(sl)) {
718 top_idx = 0;
719 } else
720 return;
721 }
722
723 top_border = sl->top_borders[top_idx][sl->mb_x];
724 /* There are two lines saved, the line above the top macroblock
725 * of a pair, and the line above the bottom macroblock. */
726 AV_COPY128(top_border, src_y + 16 * linesize);
727 if (pixel_shift)
728 AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
729
730 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
731 if (chroma444) {
732 if (pixel_shift) {
733 AV_COPY128(top_border + 32, src_cb + 16 * linesize);
734 AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
735 AV_COPY128(top_border + 64, src_cr + 16 * linesize);
736 AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
737 } else {
738 AV_COPY128(top_border + 16, src_cb + 16 * linesize);
739 AV_COPY128(top_border + 32, src_cr + 16 * linesize);
740 }
741 } else if (chroma422) {
742 if (pixel_shift) {
743 AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
744 AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
745 } else {
746 AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
747 AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
748 }
749 } else {
750 if (pixel_shift) {
751 AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
752 AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
753 } else {
754 AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
755 AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
756 }
757 }
758 }
759 }
760
761 /**
762 * Initialize implicit_weight table.
763 * @param field 0/1 initialize the weight for interlaced MBAFF
764 * -1 initializes the rest
765 */
766 static void implicit_weight_table(const H264Context *h, H264SliceContext *sl, int field)
767 {
768 int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
769
770 for (i = 0; i < 2; i++) {
771 sl->luma_weight_flag[i] = 0;
772 sl->chroma_weight_flag[i] = 0;
773 }
774
775 if (field < 0) {
776 if (h->picture_structure == PICT_FRAME) {
777 cur_poc = h->cur_pic_ptr->poc;
778 } else {
779 cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
780 }
781 if (sl->ref_count[0] == 1 && sl->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
782 sl->ref_list[0][0].poc + sl->ref_list[1][0].poc == 2 * cur_poc) {
783 sl->use_weight = 0;
784 sl->use_weight_chroma = 0;
785 return;
786 }
787 ref_start = 0;
788 ref_count0 = sl->ref_count[0];
789 ref_count1 = sl->ref_count[1];
790 } else {
791 cur_poc = h->cur_pic_ptr->field_poc[field];
792 ref_start = 16;
793 ref_count0 = 16 + 2 * sl->ref_count[0];
794 ref_count1 = 16 + 2 * sl->ref_count[1];
795 }
796
797 sl->use_weight = 2;
798 sl->use_weight_chroma = 2;
799 sl->luma_log2_weight_denom = 5;
800 sl->chroma_log2_weight_denom = 5;
801
802 for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
803 int poc0 = sl->ref_list[0][ref0].poc;
804 for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
805 int w = 32;
806 if (!sl->ref_list[0][ref0].parent->long_ref && !sl->ref_list[1][ref1].parent->long_ref) {
807 int poc1 = sl->ref_list[1][ref1].poc;
808 int td = av_clip_int8(poc1 - poc0);
809 if (td) {
810 int tb = av_clip_int8(cur_poc - poc0);
811 int tx = (16384 + (FFABS(td) >> 1)) / td;
812 int dist_scale_factor = (tb * tx + 32) >> 8;
813 if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
814 w = 64 - dist_scale_factor;
815 }
816 }
817 if (field < 0) {
818 sl->implicit_weight[ref0][ref1][0] =
819 sl->implicit_weight[ref0][ref1][1] = w;
820 } else {
821 sl->implicit_weight[ref0][ref1][field] = w;
822 }
823 }
824 }
825 }
826
827 /**
828 * initialize scan tables
829 */
830 static void init_scan_tables(H264Context *h)
831 {
832 int i;
833 for (i = 0; i < 16; i++) {
834 #define TRANSPOSE(x) (x >> 2) | ((x << 2) & 0xF)
835 h->zigzag_scan[i] = TRANSPOSE(zigzag_scan[i]);
836 h->field_scan[i] = TRANSPOSE(field_scan[i]);
837 #undef TRANSPOSE
838 }
839 for (i = 0; i < 64; i++) {
840 #define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3)
841 h->zigzag_scan8x8[i] = TRANSPOSE(ff_zigzag_direct[i]);
842 h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
843 h->field_scan8x8[i] = TRANSPOSE(field_scan8x8[i]);
844 h->field_scan8x8_cavlc[i] = TRANSPOSE(field_scan8x8_cavlc[i]);
845 #undef TRANSPOSE
846 }
847 if (h->sps.transform_bypass) { // FIXME same ugly
848 h->zigzag_scan_q0 = zigzag_scan;
849 h->zigzag_scan8x8_q0 = ff_zigzag_direct;
850 h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
851 h->field_scan_q0 = field_scan;
852 h->field_scan8x8_q0 = field_scan8x8;
853 h->field_scan8x8_cavlc_q0 = field_scan8x8_cavlc;
854 } else {
855 h->zigzag_scan_q0 = h->zigzag_scan;
856 h->zigzag_scan8x8_q0 = h->zigzag_scan8x8;
857 h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
858 h->field_scan_q0 = h->field_scan;
859 h->field_scan8x8_q0 = h->field_scan8x8;
860 h->field_scan8x8_cavlc_q0 = h->field_scan8x8_cavlc;
861 }
862 }
863
864 static enum AVPixelFormat get_pixel_format(H264Context *h)
865 {
866 #define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
867 CONFIG_H264_VAAPI_HWACCEL + \
868 (CONFIG_H264_VDA_HWACCEL * 2) + \
869 CONFIG_H264_VDPAU_HWACCEL)
870 enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmt = pix_fmts;
871 const enum AVPixelFormat *choices = pix_fmts;
872
873 switch (h->sps.bit_depth_luma) {
874 case 9:
875 if (CHROMA444(h)) {
876 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
877 *fmt++ = AV_PIX_FMT_GBRP9;
878 } else
879 *fmt++ = AV_PIX_FMT_YUV444P9;
880 } else if (CHROMA422(h))
881 *fmt++ = AV_PIX_FMT_YUV422P9;
882 else
883 *fmt++ = AV_PIX_FMT_YUV420P9;
884 break;
885 case 10:
886 if (CHROMA444(h)) {
887 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
888 *fmt++ = AV_PIX_FMT_GBRP10;
889 } else
890 *fmt++ = AV_PIX_FMT_YUV444P10;
891 } else if (CHROMA422(h))
892 *fmt++ = AV_PIX_FMT_YUV422P10;
893 else
894 *fmt++ = AV_PIX_FMT_YUV420P10;
895 break;
896 case 8:
897 #if CONFIG_H264_VDPAU_HWACCEL
898 *fmt++ = AV_PIX_FMT_VDPAU;
899 #endif
900 if (CHROMA444(h)) {
901 if (h->avctx->colorspace == AVCOL_SPC_RGB)
902 *fmt++ = AV_PIX_FMT_GBRP;
903 else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
904 *fmt++ = AV_PIX_FMT_YUVJ444P;
905 else
906 *fmt++ = AV_PIX_FMT_YUV444P;
907 } else if (CHROMA422(h)) {
908 if (h->avctx->color_range == AVCOL_RANGE_JPEG)
909 *fmt++ = AV_PIX_FMT_YUVJ422P;
910 else
911 *fmt++ = AV_PIX_FMT_YUV422P;
912 } else {
913 #if CONFIG_H264_DXVA2_HWACCEL
914 *fmt++ = AV_PIX_FMT_DXVA2_VLD;
915 #endif
916 #if CONFIG_H264_VAAPI_HWACCEL
917 *fmt++ = AV_PIX_FMT_VAAPI_VLD;
918 #endif
919 #if CONFIG_H264_VDA_HWACCEL
920 *fmt++ = AV_PIX_FMT_VDA_VLD;
921 *fmt++ = AV_PIX_FMT_VDA;
922 #endif
923 if (h->avctx->codec->pix_fmts)
924 choices = h->avctx->codec->pix_fmts;
925 else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
926 *fmt++ = AV_PIX_FMT_YUVJ420P;
927 else
928 *fmt++ = AV_PIX_FMT_YUV420P;
929 }
930 break;
931 default:
932 av_log(h->avctx, AV_LOG_ERROR,
933 "Unsupported bit depth %d\n", h->sps.bit_depth_luma);
934 return AVERROR_INVALIDDATA;
935 }
936
937 *fmt = AV_PIX_FMT_NONE;
938
939 return ff_get_format(h->avctx, choices);
940 }
941
942 /* export coded and cropped frame dimensions to AVCodecContext */
943 static int init_dimensions(H264Context *h)
944 {
945 int width = h->width - (h->sps.crop_right + h->sps.crop_left);
946 int height = h->height - (h->sps.crop_top + h->sps.crop_bottom);
947 int crop_present = h->sps.crop_left || h->sps.crop_top ||
948 h->sps.crop_right || h->sps.crop_bottom;
949
950 /* handle container cropping */
951 if (!crop_present &&
952 FFALIGN(h->avctx->width, 16) == h->width &&
953 FFALIGN(h->avctx->height, 16) == h->height) {
954 width = h->avctx->width;
955 height = h->avctx->height;
956 }
957
958 if (width <= 0 || height <= 0) {
959 av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
960 width, height);
961 if (h->avctx->err_recognition & AV_EF_EXPLODE)
962 return AVERROR_INVALIDDATA;
963
964 av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
965 h->sps.crop_bottom =
966 h->sps.crop_top =
967 h->sps.crop_right =
968 h->sps.crop_left =
969 h->sps.crop = 0;
970
971 width = h->width;
972 height = h->height;
973 }
974
975 h->avctx->coded_width = h->width;
976 h->avctx->coded_height = h->height;
977 h->avctx->width = width;
978 h->avctx->height = height;
979
980 return 0;
981 }
982
983 static int h264_slice_header_init(H264Context *h, int reinit)
984 {
985 int nb_slices = (HAVE_THREADS &&
986 h->avctx->active_thread_type & FF_THREAD_SLICE) ?
987 h->avctx->thread_count : 1;
988 int i, ret;
989
990 ff_set_sar(h->avctx, h->sps.sar);
991 av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
992 &h->chroma_x_shift, &h->chroma_y_shift);
993
994 if (h->sps.timing_info_present_flag) {
995 int64_t den = h->sps.time_scale;
996 if (h->x264_build < 44U)
997 den *= 2;
998 av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
999 h->sps.num_units_in_tick, den, 1 << 30);
1000 }
1001
1002 if (reinit)
1003 ff_h264_free_tables(h, 0);
1004 h->first_field = 0;
1005 h->prev_interlaced_frame = 1;
1006
1007 init_scan_tables(h);
1008 ret = ff_h264_alloc_tables(h);
1009 if (ret < 0) {
1010 av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
1011 return ret;
1012 }
1013
1014 if (nb_slices > H264_MAX_THREADS || (nb_slices > h->mb_height && h->mb_height)) {
1015 int max_slices;
1016 if (h->mb_height)
1017 max_slices = FFMIN(H264_MAX_THREADS, h->mb_height);
1018 else
1019 max_slices = H264_MAX_THREADS;
1020 av_log(h->avctx, AV_LOG_WARNING, "too many threads/slices %d,"
1021 " reducing to %d\n", nb_slices, max_slices);
1022 nb_slices = max_slices;
1023 }
1024 h->slice_context_count = nb_slices;
1025
1026 if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
1027 ret = ff_h264_slice_context_init(h, &h->slice_ctx[0]);
1028 if (ret < 0) {
1029 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1030 return ret;
1031 }
1032 } else {
1033 for (i = 0; i < h->slice_context_count; i++) {
1034 H264SliceContext *sl = &h->slice_ctx[i];
1035
1036 sl->h264 = h;
1037 sl->intra4x4_pred_mode = h->intra4x4_pred_mode + i * 8 * 2 * h->mb_stride;
1038 sl->mvd_table[0] = h->mvd_table[0] + i * 8 * 2 * h->mb_stride;
1039 sl->mvd_table[1] = h->mvd_table[1] + i * 8 * 2 * h->mb_stride;
1040
1041 if ((ret = ff_h264_slice_context_init(h, sl)) < 0) {
1042 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1043 return ret;
1044 }
1045 }
1046 }
1047
1048 h->context_initialized = 1;
1049
1050 return 0;
1051 }
1052
1053 /**
1054 * Decode a slice header.
1055 * This will (re)intialize the decoder and call h264_frame_start() as needed.
1056 *
1057 * @param h h264context
1058 *
1059 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1060 */
1061 int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl)
1062 {
1063 unsigned int first_mb_in_slice;
1064 unsigned int pps_id;
1065 int ret;
1066 unsigned int slice_type, tmp, i, j;
1067 int default_ref_list_done = 0;
1068 int last_pic_structure, last_pic_droppable;
1069 int needs_reinit = 0;
1070 int field_pic_flag, bottom_field_flag;
1071
1072 h->qpel_put = h->h264qpel.put_h264_qpel_pixels_tab;
1073 h->qpel_avg = h->h264qpel.avg_h264_qpel_pixels_tab;
1074
1075 first_mb_in_slice = get_ue_golomb(&sl->gb);
1076
1077 if (first_mb_in_slice == 0) { // FIXME better field boundary detection
1078 if (h->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
1079 ff_h264_field_end(h, sl, 1);
1080 }
1081
1082 h->current_slice = 0;
1083 if (!h->first_field) {
1084 if (h->cur_pic_ptr && !h->droppable) {
1085 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1086 h->picture_structure == PICT_BOTTOM_FIELD);
1087 }
1088 h->cur_pic_ptr = NULL;
1089 }
1090 }
1091
1092 slice_type = get_ue_golomb_31(&sl->gb);
1093 if (slice_type > 9) {
1094 av_log(h->avctx, AV_LOG_ERROR,
1095 "slice type %d too large at %d\n",
1096 slice_type, first_mb_in_slice);
1097 return AVERROR_INVALIDDATA;
1098 }
1099 if (slice_type > 4) {
1100 slice_type -= 5;
1101 sl->slice_type_fixed = 1;
1102 } else
1103 sl->slice_type_fixed = 0;
1104
1105 slice_type = golomb_to_pict_type[slice_type];
1106 if (slice_type == AV_PICTURE_TYPE_I ||
1107 (h->current_slice != 0 && slice_type == h->last_slice_type)) {
1108 default_ref_list_done = 1;
1109 }
1110 sl->slice_type = slice_type;
1111 sl->slice_type_nos = slice_type & 3;
1112
1113 if (h->nal_unit_type == NAL_IDR_SLICE &&
1114 sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1115 av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1116 return AVERROR_INVALIDDATA;
1117 }
1118
1119 // to make a few old functions happy, it's wrong though
1120 h->pict_type = sl->slice_type;
1121
1122 pps_id = get_ue_golomb(&sl->gb);
1123 if (pps_id >= MAX_PPS_COUNT) {
1124 av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
1125 return AVERROR_INVALIDDATA;
1126 }
1127 if (!h->pps_buffers[pps_id]) {
1128 av_log(h->avctx, AV_LOG_ERROR,
1129 "non-existing PPS %u referenced\n",
1130 pps_id);
1131 return AVERROR_INVALIDDATA;
1132 }
1133 h->pps = *h->pps_buffers[pps_id];
1134
1135 if (!h->sps_buffers[h->pps.sps_id]) {
1136 av_log(h->avctx, AV_LOG_ERROR,
1137 "non-existing SPS %u referenced\n",
1138 h->pps.sps_id);
1139 return AVERROR_INVALIDDATA;
1140 }
1141
1142 if (h->pps.sps_id != h->sps.sps_id ||
1143 h->sps_buffers[h->pps.sps_id]->new) {
1144 h->sps_buffers[h->pps.sps_id]->new = 0;
1145
1146 h->sps = *h->sps_buffers[h->pps.sps_id];
1147
1148 if (h->bit_depth_luma != h->sps.bit_depth_luma ||
1149 h->chroma_format_idc != h->sps.chroma_format_idc) {
1150 h->bit_depth_luma = h->sps.bit_depth_luma;
1151 h->chroma_format_idc = h->sps.chroma_format_idc;
1152 needs_reinit = 1;
1153 }
1154 if ((ret = ff_h264_set_parameter_from_sps(h)) < 0)
1155 return ret;
1156 }
1157
1158 h->avctx->profile = ff_h264_get_profile(&h->sps);
1159 h->avctx->level = h->sps.level_idc;
1160 h->avctx->refs = h->sps.ref_frame_count;
1161
1162 if (h->mb_width != h->sps.mb_width ||
1163 h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag))
1164 needs_reinit = 1;
1165
1166 h->mb_width = h->sps.mb_width;
1167 h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1168 h->mb_num = h->mb_width * h->mb_height;
1169 h->mb_stride = h->mb_width + 1;
1170
1171 h->b_stride = h->mb_width * 4;
1172
1173 h->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
1174
1175 h->width = 16 * h->mb_width;
1176 h->height = 16 * h->mb_height;
1177
1178 ret = init_dimensions(h);
1179 if (ret < 0)
1180 return ret;
1181
1182 if (h->sps.video_signal_type_present_flag) {
1183 h->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG
1184 : AVCOL_RANGE_MPEG;
1185 if (h->sps.colour_description_present_flag) {
1186 if (h->avctx->colorspace != h->sps.colorspace)
1187 needs_reinit = 1;
1188 h->avctx->color_primaries = h->sps.color_primaries;
1189 h->avctx->color_trc = h->sps.color_trc;
1190 h->avctx->colorspace = h->sps.colorspace;
1191 }
1192 }
1193
1194 if (h->context_initialized && needs_reinit) {
1195 if (sl != h->slice_ctx) {
1196 av_log(h->avctx, AV_LOG_ERROR,
1197 "changing width %d -> %d / height %d -> %d on "
1198 "slice %d\n",
1199 h->width, h->avctx->coded_width,
1200 h->height, h->avctx->coded_height,
1201 h->current_slice + 1);
1202 return AVERROR_INVALIDDATA;
1203 }
1204
1205 ff_h264_flush_change(h);
1206
1207 if ((ret = get_pixel_format(h)) < 0)
1208 return ret;
1209 h->avctx->pix_fmt = ret;
1210
1211 av_log(h->avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
1212 "pix_fmt: %d\n", h->width, h->height, h->avctx->pix_fmt);
1213
1214 if ((ret = h264_slice_header_init(h, 1)) < 0) {
1215 av_log(h->avctx, AV_LOG_ERROR,
1216 "h264_slice_header_init() failed\n");
1217 return ret;
1218 }
1219 }
1220 if (!h->context_initialized) {
1221 if (sl != h->slice_ctx) {
1222 av_log(h->avctx, AV_LOG_ERROR,
1223 "Cannot (re-)initialize context during parallel decoding.\n");
1224 return AVERROR_PATCHWELCOME;
1225 }
1226
1227 if ((ret = get_pixel_format(h)) < 0)
1228 return ret;
1229 h->avctx->pix_fmt = ret;
1230
1231 if ((ret = h264_slice_header_init(h, 0)) < 0) {
1232 av_log(h->avctx, AV_LOG_ERROR,
1233 "h264_slice_header_init() failed\n");
1234 return ret;
1235 }
1236 }
1237
1238 if (sl == h->slice_ctx && h->dequant_coeff_pps != pps_id) {
1239 h->dequant_coeff_pps = pps_id;
1240 h264_init_dequant_tables(h);
1241 }
1242
1243 h->frame_num = get_bits(&sl->gb, h->sps.log2_max_frame_num);
1244
1245 sl->mb_mbaff = 0;
1246 h->mb_aff_frame = 0;
1247 last_pic_structure = h->picture_structure;
1248 last_pic_droppable = h->droppable;
1249 h->droppable = h->nal_ref_idc == 0;
1250 if (h->sps.frame_mbs_only_flag) {
1251 h->picture_structure = PICT_FRAME;
1252 } else {
1253 field_pic_flag = get_bits1(&sl->gb);
1254 if (field_pic_flag) {
1255 bottom_field_flag = get_bits1(&sl->gb);
1256 h->picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1257 } else {
1258 h->picture_structure = PICT_FRAME;
1259 h->mb_aff_frame = h->sps.mb_aff;
1260 }
1261 }
1262 sl->mb_field_decoding_flag = h->picture_structure != PICT_FRAME;
1263
1264 if (h->current_slice != 0) {
1265 if (last_pic_structure != h->picture_structure ||
1266 last_pic_droppable != h->droppable) {
1267 av_log(h->avctx, AV_LOG_ERROR,
1268 "Changing field mode (%d -> %d) between slices is not allowed\n",
1269 last_pic_structure, h->picture_structure);
1270 h->picture_structure = last_pic_structure;
1271 h->droppable = last_pic_droppable;
1272 return AVERROR_INVALIDDATA;
1273 } else if (!h->cur_pic_ptr) {
1274 av_log(h->avctx, AV_LOG_ERROR,
1275 "unset cur_pic_ptr on slice %d\n",
1276 h->current_slice + 1);
1277 return AVERROR_INVALIDDATA;
1278 }
1279 } else {
1280 /* Shorten frame num gaps so we don't have to allocate reference
1281 * frames just to throw them away */
1282 if (h->frame_num != h->prev_frame_num) {
1283 int unwrap_prev_frame_num = h->prev_frame_num;
1284 int max_frame_num = 1 << h->sps.log2_max_frame_num;
1285
1286 if (unwrap_prev_frame_num > h->frame_num)
1287 unwrap_prev_frame_num -= max_frame_num;
1288
1289 if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
1290 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
1291 if (unwrap_prev_frame_num < 0)
1292 unwrap_prev_frame_num += max_frame_num;
1293
1294 h->prev_frame_num = unwrap_prev_frame_num;
1295 }
1296 }
1297
1298 /* See if we have a decoded first field looking for a pair...
1299 * Here, we're using that to see if we should mark previously
1300 * decode frames as "finished".
1301 * We have to do that before the "dummy" in-between frame allocation,
1302 * since that can modify s->current_picture_ptr. */
1303 if (h->first_field) {
1304 assert(h->cur_pic_ptr);
1305 assert(h->cur_pic_ptr->f.buf[0]);
1306 assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
1307
1308 /* figure out if we have a complementary field pair */
1309 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1310 /* Previous field is unmatched. Don't display it, but let it
1311 * remain for reference if marked as such. */
1312 if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
1313 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1314 last_pic_structure == PICT_TOP_FIELD);
1315 }
1316 } else {
1317 if (h->cur_pic_ptr->frame_num != h->frame_num) {
1318 /* This and previous field were reference, but had
1319 * different frame_nums. Consider this field first in
1320 * pair. Throw away previous field except for reference
1321 * purposes. */
1322 if (!last_pic_droppable && last_pic_structure != PICT_FRAME) {
1323 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1324 last_pic_structure == PICT_TOP_FIELD);
1325 }
1326 } else {
1327 /* Second field in complementary pair */
1328 if (!((last_pic_structure == PICT_TOP_FIELD &&
1329 h->picture_structure == PICT_BOTTOM_FIELD) ||
1330 (last_pic_structure == PICT_BOTTOM_FIELD &&
1331 h->picture_structure == PICT_TOP_FIELD))) {
1332 av_log(h->avctx, AV_LOG_ERROR,
1333 "Invalid field mode combination %d/%d\n",
1334 last_pic_structure, h->picture_structure);
1335 h->picture_structure = last_pic_structure;
1336 h->droppable = last_pic_droppable;
1337 return AVERROR_INVALIDDATA;
1338 } else if (last_pic_droppable != h->droppable) {
1339 avpriv_request_sample(h->avctx,
1340 "Found reference and non-reference fields in the same frame, which");
1341 h->picture_structure = last_pic_structure;
1342 h->droppable = last_pic_droppable;
1343 return AVERROR_PATCHWELCOME;
1344 }
1345 }
1346 }
1347 }
1348
1349 while (h->frame_num != h->prev_frame_num &&
1350 h->frame_num != (h->prev_frame_num + 1) % (1 << h->sps.log2_max_frame_num)) {
1351 H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1352 av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
1353 h->frame_num, h->prev_frame_num);
1354 ret = h264_frame_start(h);
1355 if (ret < 0) {
1356 h->first_field = 0;
1357 return ret;
1358 }
1359
1360 h->prev_frame_num++;
1361 h->prev_frame_num %= 1 << h->sps.log2_max_frame_num;
1362 h->cur_pic_ptr->frame_num = h->prev_frame_num;
1363 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
1364 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
1365 ret = ff_generate_sliding_window_mmcos(h, 1);
1366 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1367 return ret;
1368 ret = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1369 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1370 return ret;
1371 /* Error concealment: If a ref is missing, copy the previous ref
1372 * in its place.
1373 * FIXME: Avoiding a memcpy would be nice, but ref handling makes
1374 * many assumptions about there being no actual duplicates.
1375 * FIXME: This does not copy padding for out-of-frame motion
1376 * vectors. Given we are concealing a lost frame, this probably
1377 * is not noticeable by comparison, but it should be fixed. */
1378 if (h->short_ref_count) {
1379 if (prev) {
1380 av_image_copy(h->short_ref[0]->f.data,
1381 h->short_ref[0]->f.linesize,
1382 (const uint8_t **)prev->f.data,
1383 prev->f.linesize,
1384 h->avctx->pix_fmt,
1385 h->mb_width * 16,
1386 h->mb_height * 16);
1387 h->short_ref[0]->poc = prev->poc + 2;
1388 }
1389 h->short_ref[0]->frame_num = h->prev_frame_num;
1390 }
1391 }
1392
1393 /* See if we have a decoded first field looking for a pair...
1394 * We're using that to see whether to continue decoding in that
1395 * frame, or to allocate a new one. */
1396 if (h->first_field) {
1397 assert(h->cur_pic_ptr);
1398 assert(h->cur_pic_ptr->f.buf[0]);
1399 assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
1400
1401 /* figure out if we have a complementary field pair */
1402 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1403 /* Previous field is unmatched. Don't display it, but let it
1404 * remain for reference if marked as such. */
1405 h->cur_pic_ptr = NULL;
1406 h->first_field = FIELD_PICTURE(h);
1407 } else {
1408 if (h->cur_pic_ptr->frame_num != h->frame_num) {
1409 /* This and the previous field had different frame_nums.
1410 * Consider this field first in pair. Throw away previous
1411 * one except for reference purposes. */
1412 h->first_field = 1;
1413 h->cur_pic_ptr = NULL;
1414 } else {
1415 /* Second field in complementary pair */
1416 h->first_field = 0;
1417 }
1418 }
1419 } else {
1420 /* Frame or first field in a potentially complementary pair */
1421 h->first_field = FIELD_PICTURE(h);
1422 }
1423
1424 if (!FIELD_PICTURE(h) || h->first_field) {
1425 if (h264_frame_start(h) < 0) {
1426 h->first_field = 0;
1427 return AVERROR_INVALIDDATA;
1428 }
1429 } else {
1430 release_unused_pictures(h, 0);
1431 }
1432 }
1433
1434 h->cur_pic_ptr->frame_num = h->frame_num; // FIXME frame_num cleanup
1435
1436 assert(h->mb_num == h->mb_width * h->mb_height);
1437 if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
1438 first_mb_in_slice >= h->mb_num) {
1439 av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1440 return AVERROR_INVALIDDATA;
1441 }
1442 sl->resync_mb_x = sl->mb_x = first_mb_in_slice % h->mb_width;
1443 sl->resync_mb_y = sl->mb_y = (first_mb_in_slice / h->mb_width) <<
1444 FIELD_OR_MBAFF_PICTURE(h);
1445 if (h->picture_structure == PICT_BOTTOM_FIELD)
1446 sl->resync_mb_y = sl->mb_y = sl->mb_y + 1;
1447 assert(sl->mb_y < h->mb_height);
1448
1449 if (h->picture_structure == PICT_FRAME) {
1450 h->curr_pic_num = h->frame_num;
1451 h->max_pic_num = 1 << h->sps.log2_max_frame_num;
1452 } else {
1453 h->curr_pic_num = 2 * h->frame_num + 1;
1454 h->max_pic_num = 1 << (h->sps.log2_max_frame_num + 1);
1455 }
1456
1457 if (h->nal_unit_type == NAL_IDR_SLICE)
1458 get_ue_golomb(&sl->gb); /* idr_pic_id */
1459
1460 if (h->sps.poc_type == 0) {
1461 h->poc_lsb = get_bits(&sl->gb, h->sps.log2_max_poc_lsb);
1462
1463 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1464 h->delta_poc_bottom = get_se_golomb(&sl->gb);
1465 }
1466
1467 if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
1468 h->delta_poc[0] = get_se_golomb(&sl->gb);
1469
1470 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1471 h->delta_poc[1] = get_se_golomb(&sl->gb);
1472 }
1473
1474 ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
1475
1476 if (h->pps.redundant_pic_cnt_present)
1477 sl->redundant_pic_count = get_ue_golomb(&sl->gb);
1478
1479 ret = ff_set_ref_count(h, sl);
1480 if (ret < 0)
1481 return ret;
1482 else if (ret == 1)
1483 default_ref_list_done = 0;
1484
1485 if (!default_ref_list_done)
1486 ff_h264_fill_default_ref_list(h, sl);
1487
1488 if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1489 ret = ff_h264_decode_ref_pic_list_reordering(h, sl);
1490 if (ret < 0) {
1491 sl->ref_count[1] = sl->ref_count[0] = 0;
1492 return ret;
1493 }
1494 }
1495
1496 if ((h->pps.weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
1497 (h->pps.weighted_bipred_idc == 1 &&
1498 sl->slice_type_nos == AV_PICTURE_TYPE_B))
1499 ff_pred_weight_table(h, sl);
1500 else if (h->pps.weighted_bipred_idc == 2 &&
1501 sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1502 implicit_weight_table(h, sl, -1);
1503 } else {
1504 sl->use_weight = 0;
1505 for (i = 0; i < 2; i++) {
1506 sl->luma_weight_flag[i] = 0;
1507 sl->chroma_weight_flag[i] = 0;
1508 }
1509 }
1510
1511 // If frame-mt is enabled, only update mmco tables for the first slice
1512 // in a field. Subsequent slices can temporarily clobber h->mmco_index
1513 // or h->mmco, which will cause ref list mix-ups and decoding errors
1514 // further down the line. This may break decoding if the first slice is
1515 // corrupt, thus we only do this if frame-mt is enabled.
1516 if (h->nal_ref_idc) {
1517 ret = ff_h264_decode_ref_pic_marking(h, &sl->gb,
1518 !(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
1519 h->current_slice == 0);
1520 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1521 return AVERROR_INVALIDDATA;
1522 }
1523
1524 if (FRAME_MBAFF(h)) {
1525 ff_h264_fill_mbaff_ref_list(h, sl);
1526
1527 if (h->pps.weighted_bipred_idc == 2 && sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1528 implicit_weight_table(h, sl, 0);
1529 implicit_weight_table(h, sl, 1);
1530 }
1531 }
1532
1533 if (sl->slice_type_nos == AV_PICTURE_TYPE_B && !sl->direct_spatial_mv_pred)
1534 ff_h264_direct_dist_scale_factor(h, sl);
1535 ff_h264_direct_ref_list_init(h, sl);
1536
1537 if (sl->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac) {
1538 tmp = get_ue_golomb_31(&sl->gb);
1539 if (tmp > 2) {
1540 av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1541 return AVERROR_INVALIDDATA;
1542 }
1543 sl->cabac_init_idc = tmp;
1544 }
1545
1546 sl->last_qscale_diff = 0;
1547 tmp = h->pps.init_qp + get_se_golomb(&sl->gb);
1548 if (tmp > 51 + 6 * (h->sps.bit_depth_luma - 8)) {
1549 av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1550 return AVERROR_INVALIDDATA;
1551 }
1552 sl->qscale = tmp;
1553 sl->chroma_qp[0] = get_chroma_qp(h, 0, sl->qscale);
1554 sl->chroma_qp[1] = get_chroma_qp(h, 1, sl->qscale);
1555 // FIXME qscale / qp ... stuff
1556 if (sl->slice_type == AV_PICTURE_TYPE_SP)
1557 get_bits1(&sl->gb); /* sp_for_switch_flag */
1558 if (sl->slice_type == AV_PICTURE_TYPE_SP ||
1559 sl->slice_type == AV_PICTURE_TYPE_SI)
1560 get_se_golomb(&sl->gb); /* slice_qs_delta */
1561
1562 sl->deblocking_filter = 1;
1563 sl->slice_alpha_c0_offset = 0;
1564 sl->slice_beta_offset = 0;
1565 if (h->pps.deblocking_filter_parameters_present) {
1566 tmp = get_ue_golomb_31(&sl->gb);
1567 if (tmp > 2) {
1568 av_log(h->avctx, AV_LOG_ERROR,
1569 "deblocking_filter_idc %u out of range\n", tmp);
1570 return AVERROR_INVALIDDATA;
1571 }
1572 sl->deblocking_filter = tmp;
1573 if (sl->deblocking_filter < 2)
1574 sl->deblocking_filter ^= 1; // 1<->0
1575
1576 if (sl->deblocking_filter) {
1577 sl->slice_alpha_c0_offset = get_se_golomb(&sl->gb) * 2;
1578 sl->slice_beta_offset = get_se_golomb(&sl->gb) * 2;
1579 if (sl->slice_alpha_c0_offset > 12 ||
1580 sl->slice_alpha_c0_offset < -12 ||
1581 sl->slice_beta_offset > 12 ||
1582 sl->slice_beta_offset < -12) {
1583 av_log(h->avctx, AV_LOG_ERROR,
1584 "deblocking filter parameters %d %d out of range\n",
1585 sl->slice_alpha_c0_offset, sl->slice_beta_offset);
1586 return AVERROR_INVALIDDATA;
1587 }
1588 }
1589 }
1590
1591 if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
1592 (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1593 sl->slice_type_nos != AV_PICTURE_TYPE_I) ||
1594 (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
1595 sl->slice_type_nos == AV_PICTURE_TYPE_B) ||
1596 (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1597 h->nal_ref_idc == 0))
1598 sl->deblocking_filter = 0;
1599
1600 if (sl->deblocking_filter == 1 && h->max_contexts > 1) {
1601 if (h->avctx->flags2 & CODEC_FLAG2_FAST) {
1602 /* Cheat slightly for speed:
1603 * Do not bother to deblock across slices. */
1604 sl->deblocking_filter = 2;
1605 } else {
1606 h->max_contexts = 1;
1607 if (!h->single_decode_warning) {
1608 av_log(h->avctx, AV_LOG_INFO,
1609 "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
1610 h->single_decode_warning = 1;
1611 }
1612 if (sl != h->slice_ctx) {
1613 av_log(h->avctx, AV_LOG_ERROR,
1614 "Deblocking switched inside frame.\n");
1615 return 1;
1616 }
1617 }
1618 }
1619 sl->qp_thresh = 15 -
1620 FFMIN(sl->slice_alpha_c0_offset, sl->slice_beta_offset) -
1621 FFMAX3(0,
1622 h->pps.chroma_qp_index_offset[0],
1623 h->pps.chroma_qp_index_offset[1]) +
1624 6 * (h->sps.bit_depth_luma - 8);
1625
1626 h->last_slice_type = slice_type;
1627 sl->slice_num = ++h->current_slice;
1628 if (sl->slice_num >= MAX_SLICES) {
1629 av_log(h->avctx, AV_LOG_ERROR,
1630 "Too many slices, increase MAX_SLICES and recompile\n");
1631 }
1632
1633 for (j = 0; j < 2; j++) {
1634 int id_list[16];
1635 int *ref2frm = sl->ref2frm[sl->slice_num & (MAX_SLICES - 1)][j];
1636 for (i = 0; i < 16; i++) {
1637 id_list[i] = 60;
1638 if (j < sl->list_count && i < sl->ref_count[j] &&
1639 sl->ref_list[j][i].parent->f.buf[0]) {
1640 int k;
1641 AVBuffer *buf = sl->ref_list[j][i].parent->f.buf[0]->buffer;
1642 for (k = 0; k < h->short_ref_count; k++)
1643 if (h->short_ref[k]->f.buf[0]->buffer == buf) {
1644 id_list[i] = k;
1645 break;
1646 }
1647 for (k = 0; k < h->long_ref_count; k++)
1648 if (h->long_ref[k] && h->long_ref[k]->f.buf[0]->buffer == buf) {
1649 id_list[i] = h->short_ref_count + k;
1650 break;
1651 }
1652 }
1653 }
1654
1655 ref2frm[0] =
1656 ref2frm[1] = -1;
1657 for (i = 0; i < 16; i++)
1658 ref2frm[i + 2] = 4 * id_list[i] + (sl->ref_list[j][i].reference & 3);
1659 ref2frm[18 + 0] =
1660 ref2frm[18 + 1] = -1;
1661 for (i = 16; i < 48; i++)
1662 ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1663 (sl->ref_list[j][i].reference & 3);
1664 }
1665
1666 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
1667 av_log(h->avctx, AV_LOG_DEBUG,
1668 "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
1669 sl->slice_num,
1670 (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
1671 first_mb_in_slice,
1672 av_get_picture_type_char(sl->slice_type),
1673 sl->slice_type_fixed ? " fix" : "",
1674 h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
1675 pps_id, h->frame_num,
1676 h->cur_pic_ptr->field_poc[0],
1677 h->cur_pic_ptr->field_poc[1],
1678 sl->ref_count[0], sl->ref_count[1],
1679 sl->qscale,
1680 sl->deblocking_filter,
1681 sl->slice_alpha_c0_offset, sl->slice_beta_offset,
1682 sl->use_weight,
1683 sl->use_weight == 1 && sl->use_weight_chroma ? "c" : "",
1684 sl->slice_type == AV_PICTURE_TYPE_B ? (sl->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
1685 }
1686
1687 return 0;
1688 }
1689
1690 int ff_h264_get_slice_type(const H264SliceContext *sl)
1691 {
1692 switch (sl->slice_type) {
1693 case AV_PICTURE_TYPE_P:
1694 return 0;
1695 case AV_PICTURE_TYPE_B:
1696 return 1;
1697 case AV_PICTURE_TYPE_I:
1698 return 2;
1699 case AV_PICTURE_TYPE_SP:
1700 return 3;
1701 case AV_PICTURE_TYPE_SI:
1702 return 4;
1703 default:
1704 return AVERROR_INVALIDDATA;
1705 }
1706 }
1707
1708 static av_always_inline void fill_filter_caches_inter(const H264Context *h,
1709 H264SliceContext *sl,
1710 int mb_type, int top_xy,
1711 int left_xy[LEFT_MBS],
1712 int top_type,
1713 int left_type[LEFT_MBS],
1714 int mb_xy, int list)
1715 {
1716 int b_stride = h->b_stride;
1717 int16_t(*mv_dst)[2] = &sl->mv_cache[list][scan8[0]];
1718 int8_t *ref_cache = &sl->ref_cache[list][scan8[0]];
1719 if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
1720 if (USES_LIST(top_type, list)) {
1721 const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
1722 const int b8_xy = 4 * top_xy + 2;
1723 int (*ref2frm)[64] = sl->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2);
1724 AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
1725 ref_cache[0 - 1 * 8] =
1726 ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
1727 ref_cache[2 - 1 * 8] =
1728 ref_cache[3 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 1]];
1729 } else {
1730 AV_ZERO128(mv_dst - 1 * 8);
1731 AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1732 }
1733
1734 if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
1735 if (USES_LIST(left_type[LTOP], list)) {
1736 const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
1737 const int b8_xy = 4 * left_xy[LTOP] + 1;
1738 int (*ref2frm)[64] = sl->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2);
1739 AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
1740 AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
1741 AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
1742 AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
1743 ref_cache[-1 + 0] =
1744 ref_cache[-1 + 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
1745 ref_cache[-1 + 16] =
1746 ref_cache[-1 + 24] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
1747 } else {
1748 AV_ZERO32(mv_dst - 1 + 0);
1749 AV_ZERO32(mv_dst - 1 + 8);
1750 AV_ZERO32(mv_dst - 1 + 16);
1751 AV_ZERO32(mv_dst - 1 + 24);
1752 ref_cache[-1 + 0] =
1753 ref_cache[-1 + 8] =
1754 ref_cache[-1 + 16] =
1755 ref_cache[-1 + 24] = LIST_NOT_USED;
1756 }
1757 }
1758 }
1759
1760 if (!USES_LIST(mb_type, list)) {
1761 fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
1762 AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1763 AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1764 AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1765 AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
1766 return;
1767 }
1768
1769 {
1770 int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
1771 int (*ref2frm)[64] = sl->ref2frm[sl->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2);
1772 uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
1773 uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
1774 AV_WN32A(&ref_cache[0 * 8], ref01);
1775 AV_WN32A(&ref_cache[1 * 8], ref01);
1776 AV_WN32A(&ref_cache[2 * 8], ref23);
1777 AV_WN32A(&ref_cache[3 * 8], ref23);
1778 }
1779
1780 {
1781 int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * sl->mb_x + 4 * sl->mb_y * b_stride];
1782 AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
1783 AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
1784 AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
1785 AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
1786 }
1787 }
1788
1789 /**
1790 *
1791 * @return non zero if the loop filter can be skipped
1792 */
1793 static int fill_filter_caches(const H264Context *h, H264SliceContext *sl, int mb_type)
1794 {
1795 const int mb_xy = sl->mb_xy;
1796 int top_xy, left_xy[LEFT_MBS];
1797 int top_type, left_type[LEFT_MBS];
1798 uint8_t *nnz;
1799 uint8_t *nnz_cache;
1800
1801 top_xy = mb_xy - (h->mb_stride << MB_FIELD(sl));
1802
1803 /* Wow, what a mess, why didn't they simplify the interlacing & intra
1804 * stuff, I can't imagine that these complex rules are worth it. */
1805
1806 left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
1807 if (FRAME_MBAFF(h)) {
1808 const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
1809 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
1810 if (sl->mb_y & 1) {
1811 if (left_mb_field_flag != curr_mb_field_flag)
1812 left_xy[LTOP] -= h->mb_stride;
1813 } else {
1814 if (curr_mb_field_flag)
1815 top_xy += h->mb_stride &
1816 (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
1817 if (left_mb_field_flag != curr_mb_field_flag)
1818 left_xy[LBOT] += h->mb_stride;
1819 }
1820 }
1821
1822 sl->top_mb_xy = top_xy;
1823 sl->left_mb_xy[LTOP] = left_xy[LTOP];
1824 sl->left_mb_xy[LBOT] = left_xy[LBOT];
1825 {
1826 /* For sufficiently low qp, filtering wouldn't do anything.
1827 * This is a conservative estimate: could also check beta_offset
1828 * and more accurate chroma_qp. */
1829 int qp_thresh = sl->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
1830 int qp = h->cur_pic.qscale_table[mb_xy];
1831 if (qp <= qp_thresh &&
1832 (left_xy[LTOP] < 0 ||
1833 ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
1834 (top_xy < 0 ||
1835 ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
1836 if (!FRAME_MBAFF(h))
1837 return 1;
1838 if ((left_xy[LTOP] < 0 ||
1839 ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
1840 (top_xy < h->mb_stride ||
1841 ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
1842 return 1;
1843 }
1844 }
1845
1846 top_type = h->cur_pic.mb_type[top_xy];
1847 left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
1848 left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
1849 if (sl->deblocking_filter == 2) {
1850 if (h->slice_table[top_xy] != sl->slice_num)
1851 top_type = 0;
1852 if (h->slice_table[left_xy[LBOT]] != sl->slice_num)
1853 left_type[LTOP] = left_type[LBOT] = 0;
1854 } else {
1855 if (h->slice_table[top_xy] == 0xFFFF)
1856 top_type = 0;
1857 if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
1858 left_type[LTOP] = left_type[LBOT] = 0;
1859 }
1860 sl->top_type = top_type;
1861 sl->left_type[LTOP] = left_type[LTOP];
1862 sl->left_type[LBOT] = left_type[LBOT];
1863
1864 if (IS_INTRA(mb_type))
1865 return 0;
1866
1867 fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
1868 top_type, left_type, mb_xy, 0);
1869 if (sl->list_count == 2)
1870 fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
1871 top_type, left_type, mb_xy, 1);
1872
1873 nnz = h->non_zero_count[mb_xy];
1874 nnz_cache = sl->non_zero_count_cache;
1875 AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
1876 AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
1877 AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
1878 AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
1879 sl->cbp = h->cbp_table[mb_xy];
1880
1881 if (top_type) {
1882 nnz = h->non_zero_count[top_xy];
1883 AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
1884 }
1885
1886 if (left_type[LTOP]) {
1887 nnz = h->non_zero_count[left_xy[LTOP]];
1888 nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
1889 nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
1890 nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
1891 nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
1892 }
1893
1894 /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
1895 * from what the loop filter needs */
1896 if (!CABAC(h) && h->pps.transform_8x8_mode) {
1897 if (IS_8x8DCT(top_type)) {
1898 nnz_cache[4 + 8 * 0] =
1899 nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
1900 nnz_cache[6 + 8 * 0] =
1901 nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
1902 }
1903 if (IS_8x8DCT(left_type[LTOP])) {
1904 nnz_cache[3 + 8 * 1] =
1905 nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
1906 }
1907 if (IS_8x8DCT(left_type[LBOT])) {
1908 nnz_cache[3 + 8 * 3] =
1909 nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
1910 }
1911
1912 if (IS_8x8DCT(mb_type)) {
1913 nnz_cache[scan8[0]] =
1914 nnz_cache[scan8[1]] =
1915 nnz_cache[scan8[2]] =
1916 nnz_cache[scan8[3]] = (sl->cbp & 0x1000) >> 12;
1917
1918 nnz_cache[scan8[0 + 4]] =
1919 nnz_cache[scan8[1 + 4]] =
1920 nnz_cache[scan8[2 + 4]] =
1921 nnz_cache[scan8[3 + 4]] = (sl->cbp & 0x2000) >> 12;
1922
1923 nnz_cache[scan8[0 + 8]] =
1924 nnz_cache[scan8[1 + 8]] =
1925 nnz_cache[scan8[2 + 8]] =
1926 nnz_cache[scan8[3 + 8]] = (sl->cbp & 0x4000) >> 12;
1927
1928 nnz_cache[scan8[0 + 12]] =
1929 nnz_cache[scan8[1 + 12]] =
1930 nnz_cache[scan8[2 + 12]] =
1931 nnz_cache[scan8[3 + 12]] = (sl->cbp & 0x8000) >> 12;
1932 }
1933 }
1934
1935 return 0;
1936 }
1937
1938 static void loop_filter(const H264Context *h, H264SliceContext *sl, int start_x, int end_x)
1939 {
1940 uint8_t *dest_y, *dest_cb, *dest_cr;
1941 int linesize, uvlinesize, mb_x, mb_y;
1942 const int end_mb_y = sl->mb_y + FRAME_MBAFF(h);
1943 const int old_slice_type = sl->slice_type;
1944 const int pixel_shift = h->pixel_shift;
1945 const int block_h = 16 >> h->chroma_y_shift;
1946
1947 if (sl->deblocking_filter) {
1948 for (mb_x = start_x; mb_x < end_x; mb_x++)
1949 for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
1950 int mb_xy, mb_type;
1951 mb_xy = sl->mb_xy = mb_x + mb_y * h->mb_stride;
1952 sl->slice_num = h->slice_table[mb_xy];
1953 mb_type = h->cur_pic.mb_type[mb_xy];
1954 sl->list_count = h->list_counts[mb_xy];
1955
1956 if (FRAME_MBAFF(h))
1957 sl->mb_mbaff =
1958 sl->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
1959
1960 sl->mb_x = mb_x;
1961 sl->mb_y = mb_y;
1962 dest_y = h->cur_pic.f.data[0] +
1963 ((mb_x << pixel_shift) + mb_y * sl->linesize) * 16;
1964 dest_cb = h->cur_pic.f.data[1] +
1965 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
1966 mb_y * sl->uvlinesize * block_h;
1967 dest_cr = h->cur_pic.f.data[2] +
1968 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
1969 mb_y * sl->uvlinesize * block_h;
1970 // FIXME simplify above
1971
1972 if (MB_FIELD(sl)) {
1973 linesize = sl->mb_linesize = sl->linesize * 2;
1974 uvlinesize = sl->mb_uvlinesize = sl->uvlinesize * 2;
1975 if (mb_y & 1) { // FIXME move out of this function?
1976 dest_y -= sl->linesize * 15;
1977 dest_cb -= sl->uvlinesize * (block_h - 1);
1978 dest_cr -= sl->uvlinesize * (block_h - 1);
1979 }
1980 } else {
1981 linesize = sl->mb_linesize = sl->linesize;
1982 uvlinesize = sl->mb_uvlinesize = sl->uvlinesize;
1983 }
1984 backup_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
1985 uvlinesize, 0);
1986 if (fill_filter_caches(h, sl, mb_type))
1987 continue;
1988 sl->chroma_qp[0] = get_chroma_qp(h, 0, h->cur_pic.qscale_table[mb_xy]);
1989 sl->chroma_qp[1] = get_chroma_qp(h, 1, h->cur_pic.qscale_table[mb_xy]);
1990
1991 if (FRAME_MBAFF(h)) {
1992 ff_h264_filter_mb(h, sl, mb_x, mb_y, dest_y, dest_cb, dest_cr,
1993 linesize, uvlinesize);
1994 } else {
1995 ff_h264_filter_mb_fast(h, sl, mb_x, mb_y, dest_y, dest_cb,
1996 dest_cr, linesize, uvlinesize);
1997 }
1998 }
1999 }
2000 sl->slice_type = old_slice_type;
2001 sl->mb_x = end_x;
2002 sl->mb_y = end_mb_y - FRAME_MBAFF(h);
2003 sl->chroma_qp[0] = get_chroma_qp(h, 0, sl->qscale);
2004 sl->chroma_qp[1] = get_chroma_qp(h, 1, sl->qscale);
2005 }
2006
2007 static void predict_field_decoding_flag(const H264Context *h, H264SliceContext *sl)
2008 {
2009 const int mb_xy = sl->mb_x + sl->mb_y * h->mb_stride;
2010 int mb_type = (h->slice_table[mb_xy - 1] == sl->slice_num) ?
2011 h->cur_pic.mb_type[mb_xy - 1] :
2012 (h->slice_table[mb_xy - h->mb_stride] == sl->slice_num) ?
2013 h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2014 sl->mb_mbaff = sl->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2015 }
2016
2017 /**
2018 * Draw edges and report progress for the last MB row.
2019 */
2020 static void decode_finish_row(const H264Context *h, H264SliceContext *sl)
2021 {
2022 int top = 16 * (sl->mb_y >> FIELD_PICTURE(h));
2023 int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
2024 int height = 16 << FRAME_MBAFF(h);
2025 int deblock_border = (16 + 4) << FRAME_MBAFF(h);
2026
2027 if (sl->deblocking_filter) {
2028 if ((top + height) >= pic_height)
2029 height += deblock_border;
2030 top -= deblock_border;
2031 }
2032
2033 if (top >= pic_height || (top + height) < 0)
2034 return;
2035
2036 height = FFMIN(height, pic_height - top);
2037 if (top < 0) {
2038 height = top + height;
2039 top = 0;
2040 }
2041
2042 ff_h264_draw_horiz_band(h, sl, top, height);
2043
2044 if (h->droppable)
2045 return;
2046
2047 ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
2048 h->picture_structure == PICT_BOTTOM_FIELD);
2049 }
2050
2051 static void er_add_slice(H264SliceContext *sl,
2052 int startx, int starty,
2053 int endx, int endy, int status)
2054 {
2055 #if CONFIG_ERROR_RESILIENCE
2056 ERContext *er = &sl->er;
2057
2058 if (!sl->h264->enable_er)
2059 return;
2060
2061 er->ref_count = sl->ref_count[0];
2062 ff_er_add_slice(er, startx, starty, endx, endy, status);
2063 #endif
2064 }
2065
2066 static int decode_slice(struct AVCodecContext *avctx, void *arg)
2067 {
2068 H264SliceContext *sl = arg;
2069 const H264Context *h = sl->h264;
2070 int lf_x_start = sl->mb_x;
2071 int ret;
2072
2073 sl->linesize = h->cur_pic_ptr->f.linesize[0];
2074 sl->uvlinesize = h->cur_pic_ptr->f.linesize[1];
2075
2076 ret = alloc_scratch_buffers(sl, sl->linesize);
2077 if (ret < 0)
2078 return ret;
2079
2080 sl->mb_skip_run = -1;
2081
2082 sl->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2083 avctx->codec_id != AV_CODEC_ID_H264 ||
2084 (CONFIG_GRAY && (h->flags & CODEC_FLAG_GRAY));
2085
2086 if (h->pps.cabac) {
2087 /* realign */
2088 align_get_bits(&sl->gb);
2089
2090 /* init cabac */
2091 ff_init_cabac_decoder(&sl->cabac,
2092 sl->gb.buffer + get_bits_count(&sl->gb) / 8,
2093 (get_bits_left(&sl->gb) + 7) / 8);
2094
2095 ff_h264_init_cabac_states(h, sl);
2096
2097 for (;;) {
2098 // START_TIMER
2099 int ret = ff_h264_decode_mb_cabac(h, sl);
2100 int eos;
2101 // STOP_TIMER("decode_mb_cabac")
2102
2103 if (ret >= 0)
2104 ff_h264_hl_decode_mb(h, sl);
2105
2106 // FIXME optimal? or let mb_decode decode 16x32 ?
2107 if (ret >= 0 && FRAME_MBAFF(h)) {
2108 sl->mb_y++;
2109
2110 ret = ff_h264_decode_mb_cabac(h, sl);
2111
2112 if (ret >= 0)
2113 ff_h264_hl_decode_mb(h, sl);
2114 sl->mb_y--;
2115 }
2116 eos = get_cabac_terminate(&sl->cabac);
2117
2118 if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2119 sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2120 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2121 sl->mb_y, ER_MB_END);
2122 if (sl->mb_x >= lf_x_start)
2123 loop_filter(h, sl, lf_x_start, sl->mb_x + 1);
2124 return 0;
2125 }
2126 if (ret < 0 || sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2127 av_log(h->avctx, AV_LOG_ERROR,
2128 "error while decoding MB %d %d, bytestream %td\n",
2129 sl->mb_x, sl->mb_y,
2130 sl->cabac.bytestream_end - sl->cabac.bytestream);
2131 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2132 sl->mb_y, ER_MB_ERROR);
2133 return AVERROR_INVALIDDATA;
2134 }
2135
2136 if (++sl->mb_x >= h->mb_width) {
2137 loop_filter(h, sl, lf_x_start, sl->mb_x);
2138 sl->mb_x = lf_x_start = 0;
2139 decode_finish_row(h, sl);
2140 ++sl->mb_y;
2141 if (FIELD_OR_MBAFF_PICTURE(h)) {
2142 ++sl->mb_y;
2143 if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2144 predict_field_decoding_flag(h, sl);
2145 }
2146 }
2147
2148 if (eos || sl->mb_y >= h->mb_height) {
2149 ff_tlog(h->avctx, "slice end %d %d\n",
2150 get_bits_count(&sl->gb), sl->gb.size_in_bits);
2151 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2152 sl->mb_y, ER_MB_END);
2153 if (sl->mb_x > lf_x_start)
2154 loop_filter(h, sl, lf_x_start, sl->mb_x);
2155 return 0;
2156 }
2157 }
2158 } else {
2159 for (;;) {
2160 int ret = ff_h264_decode_mb_cavlc(h, sl);
2161
2162 if (ret >= 0)
2163 ff_h264_hl_decode_mb(h, sl);
2164
2165 // FIXME optimal? or let mb_decode decode 16x32 ?
2166 if (ret >= 0 && FRAME_MBAFF(h)) {
2167 sl->mb_y++;
2168 ret = ff_h264_decode_mb_cavlc(h, sl);
2169
2170 if (ret >= 0)
2171 ff_h264_hl_decode_mb(h, sl);
2172 sl->mb_y--;
2173 }
2174
2175 if (ret < 0) {
2176 av_log(h->avctx, AV_LOG_ERROR,
2177 "error while decoding MB %d %d\n", sl->mb_x, sl->mb_y);
2178 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2179 sl->mb_y, ER_MB_ERROR);
2180 return ret;
2181 }
2182
2183 if (++sl->mb_x >= h->mb_width) {
2184 loop_filter(h, sl, lf_x_start, sl->mb_x);
2185 sl->mb_x = lf_x_start = 0;
2186 decode_finish_row(h, sl);
2187 ++sl->mb_y;
2188 if (FIELD_OR_MBAFF_PICTURE(h)) {
2189 ++sl->mb_y;
2190 if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2191 predict_field_decoding_flag(h, sl);
2192 }
2193 if (sl->mb_y >= h->mb_height) {
2194 ff_tlog(h->avctx, "slice end %d %d\n",
2195 get_bits_count(&sl->gb), sl->gb.size_in_bits);
2196
2197 if (get_bits_left(&sl->gb) == 0) {
2198 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2199 sl->mb_x - 1, sl->mb_y, ER_MB_END);
2200
2201 return 0;
2202 } else {
2203 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2204 sl->mb_x - 1, sl->mb_y, ER_MB_END);
2205
2206 return AVERROR_INVALIDDATA;
2207 }
2208 }
2209 }
2210
2211 if (get_bits_left(&sl->gb) <= 0 && sl->mb_skip_run <= 0) {
2212 ff_tlog(h->avctx, "slice end %d %d\n",
2213 get_bits_count(&sl->gb), sl->gb.size_in_bits);
2214
2215 if (get_bits_left(&sl->gb) == 0) {
2216 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2217 sl->mb_x - 1, sl->mb_y, ER_MB_END);
2218 if (sl->mb_x > lf_x_start)
2219 loop_filter(h, sl, lf_x_start, sl->mb_x);
2220
2221 return 0;
2222 } else {
2223 er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2224 sl->mb_y, ER_MB_ERROR);
2225
2226 return AVERROR_INVALIDDATA;
2227 }
2228 }
2229 }
2230 }
2231 }
2232
2233 /**
2234 * Call decode_slice() for each context.
2235 *
2236 * @param h h264 master context
2237 * @param context_count number of contexts to execute
2238 */
2239 int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
2240 {
2241 AVCodecContext *const avctx = h->avctx;
2242 H264SliceContext *sl;
2243 int i;
2244
2245 if (h->avctx->hwaccel)
2246 return 0;
2247 if (context_count == 1) {
2248 int ret = decode_slice(avctx, &h->slice_ctx[0]);
2249 h->mb_y = h->slice_ctx[0].mb_y;
2250 return ret;
2251 } else {
2252 for (i = 1; i < context_count; i++) {
2253 sl = &h->slice_ctx[i];
2254 sl->er.error_count = 0;
2255 }
2256
2257 avctx->execute(avctx, decode_slice, h->slice_ctx,
2258 NULL, context_count, sizeof(h->slice_ctx[0]));
2259
2260 /* pull back stuff from slices to master context */
2261 sl = &h->slice_ctx[context_count - 1];
2262 h->mb_y = sl->mb_y;
2263 for (i = 1; i < context_count; i++)
2264 h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;
2265 }
2266
2267 return 0;
2268 }