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h264_slice.c
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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 FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg 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 FFmpeg; 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,
51  3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
52  0, 1, 2, 3,
53 };
54 
55 static const uint8_t div6[QP_MAX_NUM + 1] = {
56  0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
57  3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
58  7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10,
59  10,10,10,11,11,11,11,11,11,12,12,12,12,12,12,13,13,13, 13, 13, 13,
60  14,14,14,14,
61 };
62 
63 static const uint8_t field_scan[16+1] = {
64  0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
65  0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
66  2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
67  3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
68 };
69 
70 static const uint8_t field_scan8x8[64+1] = {
71  0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
72  1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
73  2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
74  0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
75  2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
76  2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
77  2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
78  3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
79  3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
80  4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
81  4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
82  5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
83  5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
84  7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
85  6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
86  7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
87 };
88 
89 static const uint8_t field_scan8x8_cavlc[64+1] = {
90  0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
91  2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
92  3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
93  5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
94  0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
95  1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
96  3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
97  5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
98  0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
99  1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
100  3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
101  5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
102  1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
103  1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
104  3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
105  6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
106 };
107 
108 // zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
109 static const uint8_t zigzag_scan8x8_cavlc[64+1] = {
110  0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
111  4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
112  3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
113  2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
114  1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
115  3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
116  2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
117  3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
118  0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
119  2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
120  1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
121  4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
122  0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
123  1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
124  0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
125  5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
126 };
127 
128 static const uint8_t dequant4_coeff_init[6][3] = {
129  { 10, 13, 16 },
130  { 11, 14, 18 },
131  { 13, 16, 20 },
132  { 14, 18, 23 },
133  { 16, 20, 25 },
134  { 18, 23, 29 },
135 };
136 
137 static const uint8_t dequant8_coeff_init_scan[16] = {
138  0, 3, 4, 3, 3, 1, 5, 1, 4, 5, 2, 5, 3, 1, 5, 1
139 };
140 
141 static const uint8_t dequant8_coeff_init[6][6] = {
142  { 20, 18, 32, 19, 25, 24 },
143  { 22, 19, 35, 21, 28, 26 },
144  { 26, 23, 42, 24, 33, 31 },
145  { 28, 25, 45, 26, 35, 33 },
146  { 32, 28, 51, 30, 40, 38 },
147  { 36, 32, 58, 34, 46, 43 },
148 };
149 
150 
151 static void release_unused_pictures(H264Context *h, int remove_current)
152 {
153  int i;
154 
155  /* release non reference frames */
156  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
157  if (h->DPB[i].f.buf[0] && !h->DPB[i].reference &&
158  (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
159  ff_h264_unref_picture(h, &h->DPB[i]);
160  }
161  }
162 }
163 
164 static int alloc_scratch_buffers(H264Context *h, int linesize)
165 {
166  int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
167 
168  if (h->bipred_scratchpad)
169  return 0;
170 
171  h->bipred_scratchpad = av_malloc(16 * 6 * alloc_size);
172  // edge emu needs blocksize + filter length - 1
173  // (= 21x21 for h264)
174  h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 21);
175 
176  if (!h->bipred_scratchpad || !h->edge_emu_buffer) {
177  av_freep(&h->bipred_scratchpad);
178  av_freep(&h->edge_emu_buffer);
179  return AVERROR(ENOMEM);
180  }
181 
182  return 0;
183 }
184 
185 static int init_table_pools(H264Context *h)
186 {
187  const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
188  const int mb_array_size = h->mb_stride * h->mb_height;
189  const int b4_stride = h->mb_width * 4 + 1;
190  const int b4_array_size = b4_stride * h->mb_height * 4;
191 
192  h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
193  av_buffer_allocz);
194  h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
195  sizeof(uint32_t), av_buffer_allocz);
196  h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
197  sizeof(int16_t), av_buffer_allocz);
198  h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
199 
200  if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
201  !h->ref_index_pool) {
202  av_buffer_pool_uninit(&h->qscale_table_pool);
203  av_buffer_pool_uninit(&h->mb_type_pool);
204  av_buffer_pool_uninit(&h->motion_val_pool);
205  av_buffer_pool_uninit(&h->ref_index_pool);
206  return AVERROR(ENOMEM);
207  }
208 
209  return 0;
210 }
211 
212 static int alloc_picture(H264Context *h, H264Picture *pic)
213 {
214  int i, ret = 0;
215 
216  av_assert0(!pic->f.data[0]);
217 
218  pic->tf.f = &pic->f;
219  ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
220  AV_GET_BUFFER_FLAG_REF : 0);
221  if (ret < 0)
222  goto fail;
223 
224  h->linesize = pic->f.linesize[0];
225  h->uvlinesize = pic->f.linesize[1];
226  pic->crop = h->sps.crop;
227  pic->crop_top = h->sps.crop_top;
228  pic->crop_left= h->sps.crop_left;
229 
230  if (h->avctx->hwaccel) {
231  const AVHWAccel *hwaccel = h->avctx->hwaccel;
232  av_assert0(!pic->hwaccel_picture_private);
233  if (hwaccel->frame_priv_data_size) {
234  pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
235  if (!pic->hwaccel_priv_buf)
236  return AVERROR(ENOMEM);
237  pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
238  }
239  }
240  if (!h->avctx->hwaccel && CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY && pic->f.data[2]) {
241  int h_chroma_shift, v_chroma_shift;
242  av_pix_fmt_get_chroma_sub_sample(pic->f.format,
243  &h_chroma_shift, &v_chroma_shift);
244 
245  for(i=0; i<FF_CEIL_RSHIFT(h->avctx->height, v_chroma_shift); i++) {
246  memset(pic->f.data[1] + pic->f.linesize[1]*i,
247  0x80, FF_CEIL_RSHIFT(h->avctx->width, h_chroma_shift));
248  memset(pic->f.data[2] + pic->f.linesize[2]*i,
249  0x80, FF_CEIL_RSHIFT(h->avctx->width, h_chroma_shift));
250  }
251  }
252 
253  if (!h->qscale_table_pool) {
254  ret = init_table_pools(h);
255  if (ret < 0)
256  goto fail;
257  }
258 
259  pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
260  pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
261  if (!pic->qscale_table_buf || !pic->mb_type_buf)
262  goto fail;
263 
264  pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
265  pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
266 
267  for (i = 0; i < 2; i++) {
268  pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
269  pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
270  if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
271  goto fail;
272 
273  pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
274  pic->ref_index[i] = pic->ref_index_buf[i]->data;
275  }
276 
277  return 0;
278 fail:
279  ff_h264_unref_picture(h, pic);
280  return (ret < 0) ? ret : AVERROR(ENOMEM);
281 }
282 
283 static inline int pic_is_unused(H264Context *h, H264Picture *pic)
284 {
285  if (!pic->f.buf[0])
286  return 1;
287  if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
288  return 1;
289  return 0;
290 }
291 
292 static int find_unused_picture(H264Context *h)
293 {
294  int i;
295 
296  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
297  if (pic_is_unused(h, &h->DPB[i]))
298  break;
299  }
300  if (i == H264_MAX_PICTURE_COUNT)
301  return AVERROR_INVALIDDATA;
302 
303  if (h->DPB[i].needs_realloc) {
304  h->DPB[i].needs_realloc = 0;
305  ff_h264_unref_picture(h, &h->DPB[i]);
306  }
307 
308  return i;
309 }
310 
311 
312 static void init_dequant8_coeff_table(H264Context *h)
313 {
314  int i, j, q, x;
315  const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
316 
317  for (i = 0; i < 6; i++) {
318  h->dequant8_coeff[i] = h->dequant8_buffer[i];
319  for (j = 0; j < i; j++)
320  if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
321  64 * sizeof(uint8_t))) {
322  h->dequant8_coeff[i] = h->dequant8_buffer[j];
323  break;
324  }
325  if (j < i)
326  continue;
327 
328  for (q = 0; q < max_qp + 1; q++) {
329  int shift = div6[q];
330  int idx = rem6[q];
331  for (x = 0; x < 64; x++)
332  h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
333  ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
334  h->pps.scaling_matrix8[i][x]) << shift;
335  }
336  }
337 }
338 
339 static void init_dequant4_coeff_table(H264Context *h)
340 {
341  int i, j, q, x;
342  const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
343  for (i = 0; i < 6; i++) {
344  h->dequant4_coeff[i] = h->dequant4_buffer[i];
345  for (j = 0; j < i; j++)
346  if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
347  16 * sizeof(uint8_t))) {
348  h->dequant4_coeff[i] = h->dequant4_buffer[j];
349  break;
350  }
351  if (j < i)
352  continue;
353 
354  for (q = 0; q < max_qp + 1; q++) {
355  int shift = div6[q] + 2;
356  int idx = rem6[q];
357  for (x = 0; x < 16; x++)
358  h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
359  ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
360  h->pps.scaling_matrix4[i][x]) << shift;
361  }
362  }
363 }
364 
365 void ff_h264_init_dequant_tables(H264Context *h)
366 {
367  int i, x;
368  init_dequant4_coeff_table(h);
369  memset(h->dequant8_coeff, 0, sizeof(h->dequant8_coeff));
370 
371  if (h->pps.transform_8x8_mode)
372  init_dequant8_coeff_table(h);
373  if (h->sps.transform_bypass) {
374  for (i = 0; i < 6; i++)
375  for (x = 0; x < 16; x++)
376  h->dequant4_coeff[i][0][x] = 1 << 6;
377  if (h->pps.transform_8x8_mode)
378  for (i = 0; i < 6; i++)
379  for (x = 0; x < 64; x++)
380  h->dequant8_coeff[i][0][x] = 1 << 6;
381  }
382 }
383 
384 /**
385  * Mimic alloc_tables(), but for every context thread.
386  */
387 static void clone_tables(H264Context *dst, H264Context *src, int i)
388 {
389  dst->intra4x4_pred_mode = src->intra4x4_pred_mode + i * 8 * 2 * src->mb_stride;
390  dst->non_zero_count = src->non_zero_count;
391  dst->slice_table = src->slice_table;
392  dst->cbp_table = src->cbp_table;
393  dst->mb2b_xy = src->mb2b_xy;
394  dst->mb2br_xy = src->mb2br_xy;
395  dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
396  dst->mvd_table[0] = src->mvd_table[0] + i * 8 * 2 * src->mb_stride;
397  dst->mvd_table[1] = src->mvd_table[1] + i * 8 * 2 * src->mb_stride;
398  dst->direct_table = src->direct_table;
399  dst->list_counts = src->list_counts;
400  dst->DPB = src->DPB;
401  dst->cur_pic_ptr = src->cur_pic_ptr;
402  dst->cur_pic = src->cur_pic;
403  dst->bipred_scratchpad = NULL;
404  dst->edge_emu_buffer = NULL;
405  ff_h264_pred_init(&dst->hpc, src->avctx->codec_id, src->sps.bit_depth_luma,
406  src->sps.chroma_format_idc);
407 }
408 
409 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
410 
411 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
412  (((pic) && (pic) >= (old_ctx)->DPB && \
413  (pic) < (old_ctx)->DPB + H264_MAX_PICTURE_COUNT) ? \
414  &(new_ctx)->DPB[(pic) - (old_ctx)->DPB] : NULL)
415 
416 static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
417  H264Context *new_base,
418  H264Context *old_base)
419 {
420  int i;
421 
422  for (i = 0; i < count; i++) {
423  assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
424  IN_RANGE(from[i], old_base->DPB,
425  sizeof(H264Picture) * H264_MAX_PICTURE_COUNT) ||
426  !from[i]));
427  to[i] = REBASE_PICTURE(from[i], new_base, old_base);
428  }
429 }
430 
431 static int copy_parameter_set(void **to, void **from, int count, int size)
432 {
433  int i;
434 
435  for (i = 0; i < count; i++) {
436  if (to[i] && !from[i]) {
437  av_freep(&to[i]);
438  } else if (from[i] && !to[i]) {
439  to[i] = av_malloc(size);
440  if (!to[i])
441  return AVERROR(ENOMEM);
442  }
443 
444  if (from[i])
445  memcpy(to[i], from[i], size);
446  }
447 
448  return 0;
449 }
450 
451 #define copy_fields(to, from, start_field, end_field) \
452  memcpy(&(to)->start_field, &(from)->start_field, \
453  (char *)&(to)->end_field - (char *)&(to)->start_field)
454 
455 static int h264_slice_header_init(H264Context *h, int reinit);
456 
457 int ff_h264_update_thread_context(AVCodecContext *dst,
458  const AVCodecContext *src)
459 {
460  H264Context *h = dst->priv_data, *h1 = src->priv_data;
461  int inited = h->context_initialized, err = 0;
462  int context_reinitialized = 0;
463  int i, ret;
464 
465  if (dst == src)
466  return 0;
467 
468  if (inited &&
469  (h->width != h1->width ||
470  h->height != h1->height ||
471  h->mb_width != h1->mb_width ||
472  h->mb_height != h1->mb_height ||
473  h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
474  h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
475  h->sps.colorspace != h1->sps.colorspace)) {
476 
477  /* set bits_per_raw_sample to the previous value. the check for changed
478  * bit depth in h264_set_parameter_from_sps() uses it and sets it to
479  * the current value */
480  h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
481 
482  av_freep(&h->bipred_scratchpad);
483 
484  h->width = h1->width;
485  h->height = h1->height;
486  h->mb_height = h1->mb_height;
487  h->mb_width = h1->mb_width;
488  h->mb_num = h1->mb_num;
489  h->mb_stride = h1->mb_stride;
490  h->b_stride = h1->b_stride;
491  // SPS/PPS
492  if ((ret = copy_parameter_set((void **)h->sps_buffers,
493  (void **)h1->sps_buffers,
494  MAX_SPS_COUNT, sizeof(SPS))) < 0)
495  return ret;
496  h->sps = h1->sps;
497  if ((ret = copy_parameter_set((void **)h->pps_buffers,
498  (void **)h1->pps_buffers,
499  MAX_PPS_COUNT, sizeof(PPS))) < 0)
500  return ret;
501  h->pps = h1->pps;
502 
503  if ((err = h264_slice_header_init(h, 1)) < 0) {
504  av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed\n");
505  return err;
506  }
507  context_reinitialized = 1;
508 
509 #if 0
510  h264_set_parameter_from_sps(h);
511  //Note we set context_reinitialized which will cause h264_set_parameter_from_sps to be reexecuted
512  h->cur_chroma_format_idc = h1->cur_chroma_format_idc;
513 #endif
514  }
515  /* update linesize on resize for h264. The h264 decoder doesn't
516  * necessarily call ff_mpv_frame_start in the new thread */
517  h->linesize = h1->linesize;
518  h->uvlinesize = h1->uvlinesize;
519 
520  /* copy block_offset since frame_start may not be called */
521  memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
522 
523  if (!inited) {
524  for (i = 0; i < MAX_SPS_COUNT; i++)
525  av_freep(h->sps_buffers + i);
526 
527  for (i = 0; i < MAX_PPS_COUNT; i++)
528  av_freep(h->pps_buffers + i);
529 
530  av_freep(&h->rbsp_buffer[0]);
531  av_freep(&h->rbsp_buffer[1]);
532  ff_h264_unref_picture(h, &h->last_pic_for_ec);
533  memcpy(h, h1, offsetof(H264Context, intra_pcm_ptr));
534  memcpy(&h->cabac, &h1->cabac,
535  sizeof(H264Context) - offsetof(H264Context, cabac));
536  av_assert0((void*)&h->cabac == &h->mb_padding + 1);
537 
538  memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
539  memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
540 
541  memset(&h->er, 0, sizeof(h->er));
542  memset(&h->mb, 0, sizeof(h->mb));
543  memset(&h->mb_luma_dc, 0, sizeof(h->mb_luma_dc));
544  memset(&h->mb_padding, 0, sizeof(h->mb_padding));
545  memset(&h->cur_pic, 0, sizeof(h->cur_pic));
546  memset(&h->last_pic_for_ec, 0, sizeof(h->last_pic_for_ec));
547 
548  h->avctx = dst;
549  h->DPB = NULL;
550  h->qscale_table_pool = NULL;
551  h->mb_type_pool = NULL;
552  h->ref_index_pool = NULL;
553  h->motion_val_pool = NULL;
554  h->intra4x4_pred_mode= NULL;
555  h->non_zero_count = NULL;
556  h->slice_table_base = NULL;
557  h->slice_table = NULL;
558  h->cbp_table = NULL;
559  h->chroma_pred_mode_table = NULL;
560  memset(h->mvd_table, 0, sizeof(h->mvd_table));
561  h->direct_table = NULL;
562  h->list_counts = NULL;
563  h->mb2b_xy = NULL;
564  h->mb2br_xy = NULL;
565  for (i = 0; i < 2; i++) {
566  h->rbsp_buffer[i] = NULL;
567  h->rbsp_buffer_size[i] = 0;
568  }
569 
570  if (h1->context_initialized) {
571  h->context_initialized = 0;
572 
573  memset(&h->cur_pic, 0, sizeof(h->cur_pic));
574  av_frame_unref(&h->cur_pic.f);
575  h->cur_pic.tf.f = &h->cur_pic.f;
576 
577  ret = ff_h264_alloc_tables(h);
578  if (ret < 0) {
579  av_log(dst, AV_LOG_ERROR, "Could not allocate memory\n");
580  return ret;
581  }
582  ret = ff_h264_context_init(h);
583  if (ret < 0) {
584  av_log(dst, AV_LOG_ERROR, "context_init() failed.\n");
585  return ret;
586  }
587  }
588 
589  h->bipred_scratchpad = NULL;
590  h->edge_emu_buffer = NULL;
591 
592  h->thread_context[0] = h;
593  h->context_initialized = h1->context_initialized;
594  }
595 
596  h->avctx->coded_height = h1->avctx->coded_height;
597  h->avctx->coded_width = h1->avctx->coded_width;
598  h->avctx->width = h1->avctx->width;
599  h->avctx->height = h1->avctx->height;
600  h->coded_picture_number = h1->coded_picture_number;
601  h->first_field = h1->first_field;
602  h->picture_structure = h1->picture_structure;
603  h->qscale = h1->qscale;
604  h->droppable = h1->droppable;
605  h->low_delay = h1->low_delay;
606 
607  for (i = 0; h->DPB && i < H264_MAX_PICTURE_COUNT; i++) {
608  ff_h264_unref_picture(h, &h->DPB[i]);
609  if (h1->DPB && h1->DPB[i].f.buf[0] &&
610  (ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
611  return ret;
612  }
613 
614  h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
615  ff_h264_unref_picture(h, &h->cur_pic);
616  if (h1->cur_pic.f.buf[0]) {
617  ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic);
618  if (ret < 0)
619  return ret;
620  }
621 
622  h->workaround_bugs = h1->workaround_bugs;
623  h->low_delay = h1->low_delay;
624  h->droppable = h1->droppable;
625 
626  // extradata/NAL handling
627  h->is_avc = h1->is_avc;
628 
629  // SPS/PPS
630  if ((ret = copy_parameter_set((void **)h->sps_buffers,
631  (void **)h1->sps_buffers,
632  MAX_SPS_COUNT, sizeof(SPS))) < 0)
633  return ret;
634  h->sps = h1->sps;
635  if ((ret = copy_parameter_set((void **)h->pps_buffers,
636  (void **)h1->pps_buffers,
637  MAX_PPS_COUNT, sizeof(PPS))) < 0)
638  return ret;
639  h->pps = h1->pps;
640 
641  // Dequantization matrices
642  // FIXME these are big - can they be only copied when PPS changes?
643  copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
644 
645  for (i = 0; i < 6; i++)
646  h->dequant4_coeff[i] = h->dequant4_buffer[0] +
647  (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
648 
649  for (i = 0; i < 6; i++)
650  h->dequant8_coeff[i] = h->dequant8_buffer[0] +
651  (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
652 
653  h->dequant_coeff_pps = h1->dequant_coeff_pps;
654 
655  // POC timing
656  copy_fields(h, h1, poc_lsb, redundant_pic_count);
657 
658  // reference lists
659  copy_fields(h, h1, short_ref, cabac_init_idc);
660 
661  copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
662  copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
663  copy_picture_range(h->delayed_pic, h1->delayed_pic,
664  MAX_DELAYED_PIC_COUNT + 2, h, h1);
665 
666  h->frame_recovered = h1->frame_recovered;
667 
668  if (context_reinitialized)
669  ff_h264_set_parameter_from_sps(h);
670 
671  if (!h->cur_pic_ptr)
672  return 0;
673 
674  if (!h->droppable) {
675  err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
676  h->prev_poc_msb = h->poc_msb;
677  h->prev_poc_lsb = h->poc_lsb;
678  }
679  h->prev_frame_num_offset = h->frame_num_offset;
680  h->prev_frame_num = h->frame_num;
681  h->outputed_poc = h->next_outputed_poc;
682 
683  h->recovery_frame = h1->recovery_frame;
684 
685  return err;
686 }
687 
688 static int h264_frame_start(H264Context *h)
689 {
690  H264Picture *pic;
691  int i, ret;
692  const int pixel_shift = h->pixel_shift;
693  int c[4] = {
694  1<<(h->sps.bit_depth_luma-1),
695  1<<(h->sps.bit_depth_chroma-1),
696  1<<(h->sps.bit_depth_chroma-1),
697  -1
698  };
699 
700  if (!ff_thread_can_start_frame(h->avctx)) {
701  av_log(h->avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
702  return -1;
703  }
704 
705  release_unused_pictures(h, 1);
706  h->cur_pic_ptr = NULL;
707 
708  i = find_unused_picture(h);
709  if (i < 0) {
710  av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
711  return i;
712  }
713  pic = &h->DPB[i];
714 
715  pic->reference = h->droppable ? 0 : h->picture_structure;
716  pic->f.coded_picture_number = h->coded_picture_number++;
717  pic->field_picture = h->picture_structure != PICT_FRAME;
718 
719  /*
720  * Zero key_frame here; IDR markings per slice in frame or fields are ORed
721  * in later.
722  * See decode_nal_units().
723  */
724  pic->f.key_frame = 0;
725  pic->mmco_reset = 0;
726  pic->recovered = 0;
727  pic->invalid_gap = 0;
728  pic->sei_recovery_frame_cnt = h->sei_recovery_frame_cnt;
729 
730  if ((ret = alloc_picture(h, pic)) < 0)
731  return ret;
732  if(!h->frame_recovered && !h->avctx->hwaccel &&
733  !(h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU))
734  avpriv_color_frame(&pic->f, c);
735 
736  h->cur_pic_ptr = pic;
737  ff_h264_unref_picture(h, &h->cur_pic);
738  if (CONFIG_ERROR_RESILIENCE) {
739  ff_h264_set_erpic(&h->er.cur_pic, NULL);
740  }
741 
742  if ((ret = ff_h264_ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
743  return ret;
744 
745  if (CONFIG_ERROR_RESILIENCE) {
746  ff_er_frame_start(&h->er);
747  ff_h264_set_erpic(&h->er.last_pic, NULL);
748  ff_h264_set_erpic(&h->er.next_pic, NULL);
749  }
750 
751  assert(h->linesize && h->uvlinesize);
752 
753  for (i = 0; i < 16; i++) {
754  h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
755  h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
756  }
757  for (i = 0; i < 16; i++) {
758  h->block_offset[16 + i] =
759  h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
760  h->block_offset[48 + 16 + i] =
761  h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
762  }
763 
764  /* We mark the current picture as non-reference after allocating it, so
765  * that if we break out due to an error it can be released automatically
766  * in the next ff_mpv_frame_start().
767  */
768  h->cur_pic_ptr->reference = 0;
769 
770  h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
771 
772  h->next_output_pic = NULL;
773 
774  assert(h->cur_pic_ptr->long_ref == 0);
775 
776  return 0;
777 }
778 
779 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
780  uint8_t *src_cb, uint8_t *src_cr,
781  int linesize, int uvlinesize,
782  int simple)
783 {
784  uint8_t *top_border;
785  int top_idx = 1;
786  const int pixel_shift = h->pixel_shift;
787  int chroma444 = CHROMA444(h);
788  int chroma422 = CHROMA422(h);
789 
790  src_y -= linesize;
791  src_cb -= uvlinesize;
792  src_cr -= uvlinesize;
793 
794  if (!simple && FRAME_MBAFF(h)) {
795  if (h->mb_y & 1) {
796  if (!MB_MBAFF(h)) {
797  top_border = h->top_borders[0][h->mb_x];
798  AV_COPY128(top_border, src_y + 15 * linesize);
799  if (pixel_shift)
800  AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
801  if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
802  if (chroma444) {
803  if (pixel_shift) {
804  AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
805  AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
806  AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
807  AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
808  } else {
809  AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
810  AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
811  }
812  } else if (chroma422) {
813  if (pixel_shift) {
814  AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
815  AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
816  } else {
817  AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
818  AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
819  }
820  } else {
821  if (pixel_shift) {
822  AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
823  AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
824  } else {
825  AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
826  AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
827  }
828  }
829  }
830  }
831  } else if (MB_MBAFF(h)) {
832  top_idx = 0;
833  } else
834  return;
835  }
836 
837  top_border = h->top_borders[top_idx][h->mb_x];
838  /* There are two lines saved, the line above the top macroblock
839  * of a pair, and the line above the bottom macroblock. */
840  AV_COPY128(top_border, src_y + 16 * linesize);
841  if (pixel_shift)
842  AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
843 
844  if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
845  if (chroma444) {
846  if (pixel_shift) {
847  AV_COPY128(top_border + 32, src_cb + 16 * linesize);
848  AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
849  AV_COPY128(top_border + 64, src_cr + 16 * linesize);
850  AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
851  } else {
852  AV_COPY128(top_border + 16, src_cb + 16 * linesize);
853  AV_COPY128(top_border + 32, src_cr + 16 * linesize);
854  }
855  } else if (chroma422) {
856  if (pixel_shift) {
857  AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
858  AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
859  } else {
860  AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
861  AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
862  }
863  } else {
864  if (pixel_shift) {
865  AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
866  AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
867  } else {
868  AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
869  AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
870  }
871  }
872  }
873 }
874 
875 /**
876  * Initialize implicit_weight table.
877  * @param field 0/1 initialize the weight for interlaced MBAFF
878  * -1 initializes the rest
879  */
880 static void implicit_weight_table(H264Context *h, int field)
881 {
882  int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
883 
884  for (i = 0; i < 2; i++) {
885  h->luma_weight_flag[i] = 0;
886  h->chroma_weight_flag[i] = 0;
887  }
888 
889  if (field < 0) {
890  if (h->picture_structure == PICT_FRAME) {
891  cur_poc = h->cur_pic_ptr->poc;
892  } else {
893  cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
894  }
895  if (h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
896  h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2 * cur_poc) {
897  h->use_weight = 0;
898  h->use_weight_chroma = 0;
899  return;
900  }
901  ref_start = 0;
902  ref_count0 = h->ref_count[0];
903  ref_count1 = h->ref_count[1];
904  } else {
905  cur_poc = h->cur_pic_ptr->field_poc[field];
906  ref_start = 16;
907  ref_count0 = 16 + 2 * h->ref_count[0];
908  ref_count1 = 16 + 2 * h->ref_count[1];
909  }
910 
911  h->use_weight = 2;
912  h->use_weight_chroma = 2;
913  h->luma_log2_weight_denom = 5;
914  h->chroma_log2_weight_denom = 5;
915 
916  for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
917  int poc0 = h->ref_list[0][ref0].poc;
918  for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
919  int w = 32;
920  if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
921  int poc1 = h->ref_list[1][ref1].poc;
922  int td = av_clip_int8(poc1 - poc0);
923  if (td) {
924  int tb = av_clip_int8(cur_poc - poc0);
925  int tx = (16384 + (FFABS(td) >> 1)) / td;
926  int dist_scale_factor = (tb * tx + 32) >> 8;
927  if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
928  w = 64 - dist_scale_factor;
929  }
930  }
931  if (field < 0) {
932  h->implicit_weight[ref0][ref1][0] =
933  h->implicit_weight[ref0][ref1][1] = w;
934  } else {
935  h->implicit_weight[ref0][ref1][field] = w;
936  }
937  }
938  }
939 }
940 
941 /**
942  * initialize scan tables
943  */
944 static void init_scan_tables(H264Context *h)
945 {
946  int i;
947  for (i = 0; i < 16; i++) {
948 #define TRANSPOSE(x) ((x) >> 2) | (((x) << 2) & 0xF)
949  h->zigzag_scan[i] = TRANSPOSE(zigzag_scan[i]);
950  h->field_scan[i] = TRANSPOSE(field_scan[i]);
951 #undef TRANSPOSE
952  }
953  for (i = 0; i < 64; i++) {
954 #define TRANSPOSE(x) ((x) >> 3) | (((x) & 7) << 3)
955  h->zigzag_scan8x8[i] = TRANSPOSE(ff_zigzag_direct[i]);
956  h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
957  h->field_scan8x8[i] = TRANSPOSE(field_scan8x8[i]);
958  h->field_scan8x8_cavlc[i] = TRANSPOSE(field_scan8x8_cavlc[i]);
959 #undef TRANSPOSE
960  }
961  if (h->sps.transform_bypass) { // FIXME same ugly
962  memcpy(h->zigzag_scan_q0 , zigzag_scan , sizeof(h->zigzag_scan_q0 ));
963  memcpy(h->zigzag_scan8x8_q0 , ff_zigzag_direct , sizeof(h->zigzag_scan8x8_q0 ));
964  memcpy(h->zigzag_scan8x8_cavlc_q0 , zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
965  memcpy(h->field_scan_q0 , field_scan , sizeof(h->field_scan_q0 ));
966  memcpy(h->field_scan8x8_q0 , field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
967  memcpy(h->field_scan8x8_cavlc_q0 , field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
968  } else {
969  memcpy(h->zigzag_scan_q0 , h->zigzag_scan , sizeof(h->zigzag_scan_q0 ));
970  memcpy(h->zigzag_scan8x8_q0 , h->zigzag_scan8x8 , sizeof(h->zigzag_scan8x8_q0 ));
971  memcpy(h->zigzag_scan8x8_cavlc_q0 , h->zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
972  memcpy(h->field_scan_q0 , h->field_scan , sizeof(h->field_scan_q0 ));
973  memcpy(h->field_scan8x8_q0 , h->field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
974  memcpy(h->field_scan8x8_cavlc_q0 , h->field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
975  }
976 }
977 
978 /**
979  * Replicate H264 "master" context to thread contexts.
980  */
981 static int clone_slice(H264Context *dst, H264Context *src)
982 {
983  memcpy(dst->block_offset, src->block_offset, sizeof(dst->block_offset));
984  dst->cur_pic_ptr = src->cur_pic_ptr;
985  dst->cur_pic = src->cur_pic;
986  dst->linesize = src->linesize;
987  dst->uvlinesize = src->uvlinesize;
988  dst->first_field = src->first_field;
989 
990  dst->prev_poc_msb = src->prev_poc_msb;
991  dst->prev_poc_lsb = src->prev_poc_lsb;
992  dst->prev_frame_num_offset = src->prev_frame_num_offset;
993  dst->prev_frame_num = src->prev_frame_num;
994  dst->short_ref_count = src->short_ref_count;
995 
996  memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
997  memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
998  memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
999 
1000  memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
1001  memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));
1002 
1003  return 0;
1004 }
1005 
1006 static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
1007 {
1008 #define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
1009  CONFIG_H264_VAAPI_HWACCEL + \
1010  (CONFIG_H264_VDA_HWACCEL * 2) + \
1011  CONFIG_H264_VDPAU_HWACCEL)
1012  enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmt = pix_fmts;
1013  const enum AVPixelFormat *choices = pix_fmts;
1014  int i;
1015 
1016  switch (h->sps.bit_depth_luma) {
1017  case 9:
1018  if (CHROMA444(h)) {
1019  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1020  *fmt++ = AV_PIX_FMT_GBRP9;
1021  } else
1022  *fmt++ = AV_PIX_FMT_YUV444P9;
1023  } else if (CHROMA422(h))
1024  *fmt++ = AV_PIX_FMT_YUV422P9;
1025  else
1026  *fmt++ = AV_PIX_FMT_YUV420P9;
1027  break;
1028  case 10:
1029  if (CHROMA444(h)) {
1030  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1031  *fmt++ = AV_PIX_FMT_GBRP10;
1032  } else
1033  *fmt++ = AV_PIX_FMT_YUV444P10;
1034  } else if (CHROMA422(h))
1035  *fmt++ = AV_PIX_FMT_YUV422P10;
1036  else
1037  *fmt++ = AV_PIX_FMT_YUV420P10;
1038  break;
1039  case 12:
1040  if (CHROMA444(h)) {
1041  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1042  *fmt++ = AV_PIX_FMT_GBRP12;
1043  } else
1044  *fmt++ = AV_PIX_FMT_YUV444P12;
1045  } else if (CHROMA422(h))
1046  *fmt++ = AV_PIX_FMT_YUV422P12;
1047  else
1048  *fmt++ = AV_PIX_FMT_YUV420P12;
1049  break;
1050  case 14:
1051  if (CHROMA444(h)) {
1052  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1053  *fmt++ = AV_PIX_FMT_GBRP14;
1054  } else
1055  *fmt++ = AV_PIX_FMT_YUV444P14;
1056  } else if (CHROMA422(h))
1057  *fmt++ = AV_PIX_FMT_YUV422P14;
1058  else
1059  *fmt++ = AV_PIX_FMT_YUV420P14;
1060  break;
1061  case 8:
1062 #if CONFIG_H264_VDPAU_HWACCEL
1063  *fmt++ = AV_PIX_FMT_VDPAU;
1064 #endif
1065  if (CHROMA444(h)) {
1066  if (h->avctx->colorspace == AVCOL_SPC_YCGCO)
1067  av_log(h->avctx, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
1068  if (h->avctx->colorspace == AVCOL_SPC_RGB)
1069  *fmt++ = AV_PIX_FMT_GBRP;
1070  else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
1071  *fmt++ = AV_PIX_FMT_YUVJ444P;
1072  else
1073  *fmt++ = AV_PIX_FMT_YUV444P;
1074  } else if (CHROMA422(h)) {
1075  if (h->avctx->color_range == AVCOL_RANGE_JPEG)
1076  *fmt++ = AV_PIX_FMT_YUVJ422P;
1077  else
1078  *fmt++ = AV_PIX_FMT_YUV422P;
1079  } else {
1080 #if CONFIG_H264_DXVA2_HWACCEL
1081  *fmt++ = AV_PIX_FMT_DXVA2_VLD;
1082 #endif
1083 #if CONFIG_H264_VAAPI_HWACCEL
1084  *fmt++ = AV_PIX_FMT_VAAPI_VLD;
1085 #endif
1086 #if CONFIG_H264_VDA_HWACCEL
1087  *fmt++ = AV_PIX_FMT_VDA_VLD;
1088  *fmt++ = AV_PIX_FMT_VDA;
1089 #endif
1090  if (h->avctx->codec->pix_fmts)
1091  choices = h->avctx->codec->pix_fmts;
1092  else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
1093  *fmt++ = AV_PIX_FMT_YUVJ420P;
1094  else
1095  *fmt++ = AV_PIX_FMT_YUV420P;
1096  }
1097  break;
1098  default:
1099  av_log(h->avctx, AV_LOG_ERROR,
1100  "Unsupported bit depth %d\n", h->sps.bit_depth_luma);
1101  return AVERROR_INVALIDDATA;
1102  }
1103 
1104  *fmt = AV_PIX_FMT_NONE;
1105 
1106  for (i=0; choices[i] != AV_PIX_FMT_NONE; i++)
1107  if (choices[i] == h->avctx->pix_fmt && !force_callback)
1108  return choices[i];
1109  return ff_thread_get_format(h->avctx, choices);
1110 }
1111 
1112 /* export coded and cropped frame dimensions to AVCodecContext */
1113 static int init_dimensions(H264Context *h)
1114 {
1115  int width = h->width - (h->sps.crop_right + h->sps.crop_left);
1116  int height = h->height - (h->sps.crop_top + h->sps.crop_bottom);
1117  int crop_present = h->sps.crop_left || h->sps.crop_top ||
1118  h->sps.crop_right || h->sps.crop_bottom;
1119  av_assert0(h->sps.crop_right + h->sps.crop_left < (unsigned)h->width);
1120  av_assert0(h->sps.crop_top + h->sps.crop_bottom < (unsigned)h->height);
1121 
1122  /* handle container cropping */
1123  if (!crop_present &&
1124  FFALIGN(h->avctx->width, 16) == h->width &&
1125  FFALIGN(h->avctx->height, 16) == h->height) {
1126  width = h->avctx->width;
1127  height = h->avctx->height;
1128  }
1129 
1130  if (width <= 0 || height <= 0) {
1131  av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
1132  width, height);
1133  if (h->avctx->err_recognition & AV_EF_EXPLODE)
1134  return AVERROR_INVALIDDATA;
1135 
1136  av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
1137  h->sps.crop_bottom =
1138  h->sps.crop_top =
1139  h->sps.crop_right =
1140  h->sps.crop_left =
1141  h->sps.crop = 0;
1142 
1143  width = h->width;
1144  height = h->height;
1145  }
1146 
1147  h->avctx->coded_width = h->width;
1148  h->avctx->coded_height = h->height;
1149  h->avctx->width = width;
1150  h->avctx->height = height;
1151 
1152  return 0;
1153 }
1154 
1155 static int h264_slice_header_init(H264Context *h, int reinit)
1156 {
1157  int nb_slices = (HAVE_THREADS &&
1158  h->avctx->active_thread_type & FF_THREAD_SLICE) ?
1159  h->avctx->thread_count : 1;
1160  int i, ret;
1161 
1162  ff_set_sar(h->avctx, h->sps.sar);
1163  av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
1164  &h->chroma_x_shift, &h->chroma_y_shift);
1165 
1166  if (h->sps.timing_info_present_flag) {
1167  int64_t den = h->sps.time_scale;
1168  if (h->x264_build < 44U)
1169  den *= 2;
1170  av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
1171  h->sps.num_units_in_tick * h->avctx->ticks_per_frame, den, 1 << 30);
1172  }
1173 
1174  if (reinit)
1175  ff_h264_free_tables(h, 0);
1176  h->first_field = 0;
1177  h->prev_interlaced_frame = 1;
1178 
1179  init_scan_tables(h);
1180  ret = ff_h264_alloc_tables(h);
1181  if (ret < 0) {
1182  av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
1183  goto fail;
1184  }
1185 
1186  if (nb_slices > H264_MAX_THREADS || (nb_slices > h->mb_height && h->mb_height)) {
1187  int max_slices;
1188  if (h->mb_height)
1189  max_slices = FFMIN(H264_MAX_THREADS, h->mb_height);
1190  else
1191  max_slices = H264_MAX_THREADS;
1192  av_log(h->avctx, AV_LOG_WARNING, "too many threads/slices %d,"
1193  " reducing to %d\n", nb_slices, max_slices);
1194  nb_slices = max_slices;
1195  }
1196  h->slice_context_count = nb_slices;
1197 
1198  if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
1199  ret = ff_h264_context_init(h);
1200  if (ret < 0) {
1201  av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1202  goto fail;
1203  }
1204  } else {
1205  for (i = 1; i < h->slice_context_count; i++) {
1206  H264Context *c;
1207  c = h->thread_context[i] = av_mallocz(sizeof(H264Context));
1208  if (!c) {
1209  ret = AVERROR(ENOMEM);
1210  goto fail;
1211  }
1212  c->avctx = h->avctx;
1213  c->vdsp = h->vdsp;
1214  c->h264dsp = h->h264dsp;
1215  c->h264qpel = h->h264qpel;
1216  c->h264chroma = h->h264chroma;
1217  c->sps = h->sps;
1218  c->pps = h->pps;
1219  c->pixel_shift = h->pixel_shift;
1220  c->cur_chroma_format_idc = h->cur_chroma_format_idc;
1221  c->width = h->width;
1222  c->height = h->height;
1223  c->linesize = h->linesize;
1224  c->uvlinesize = h->uvlinesize;
1225  c->chroma_x_shift = h->chroma_x_shift;
1226  c->chroma_y_shift = h->chroma_y_shift;
1227  c->qscale = h->qscale;
1228  c->droppable = h->droppable;
1229  c->low_delay = h->low_delay;
1230  c->mb_width = h->mb_width;
1231  c->mb_height = h->mb_height;
1232  c->mb_stride = h->mb_stride;
1233  c->mb_num = h->mb_num;
1234  c->flags = h->flags;
1235  c->workaround_bugs = h->workaround_bugs;
1236  c->pict_type = h->pict_type;
1237 
1238  init_scan_tables(c);
1239  clone_tables(c, h, i);
1240  c->context_initialized = 1;
1241  }
1242 
1243  for (i = 0; i < h->slice_context_count; i++)
1244  if ((ret = ff_h264_context_init(h->thread_context[i])) < 0) {
1245  av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1246  goto fail;
1247  }
1248  }
1249 
1250  h->context_initialized = 1;
1251 
1252  return 0;
1253 fail:
1254  ff_h264_free_tables(h, 0);
1255  h->context_initialized = 0;
1256  return ret;
1257 }
1258 
1259 static enum AVPixelFormat non_j_pixfmt(enum AVPixelFormat a)
1260 {
1261  switch (a) {
1262  case AV_PIX_FMT_YUVJ420P: return AV_PIX_FMT_YUV420P;
1263  case AV_PIX_FMT_YUVJ422P: return AV_PIX_FMT_YUV422P;
1264  case AV_PIX_FMT_YUVJ444P: return AV_PIX_FMT_YUV444P;
1265  default:
1266  return a;
1267  }
1268 }
1269 
1270 /**
1271  * Decode a slice header.
1272  * This will (re)intialize the decoder and call h264_frame_start() as needed.
1273  *
1274  * @param h h264context
1275  * @param h0 h264 master context (differs from 'h' when doing sliced based
1276  * parallel decoding)
1277  *
1278  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1279  */
1280 int ff_h264_decode_slice_header(H264Context *h, H264Context *h0)
1281 {
1282  unsigned int first_mb_in_slice;
1283  unsigned int pps_id;
1284  int ret;
1285  unsigned int slice_type, tmp, i, j;
1286  int last_pic_structure, last_pic_droppable;
1287  int must_reinit;
1288  int needs_reinit = 0;
1289  int field_pic_flag, bottom_field_flag;
1290  int first_slice = h == h0 && !h0->current_slice;
1291  int frame_num, picture_structure, droppable;
1292  PPS *pps;
1293 
1294  h->qpel_put = h->h264qpel.put_h264_qpel_pixels_tab;
1295  h->qpel_avg = h->h264qpel.avg_h264_qpel_pixels_tab;
1296 
1297  first_mb_in_slice = get_ue_golomb_long(&h->gb);
1298 
1299  if (first_mb_in_slice == 0) { // FIXME better field boundary detection
1300  if (h0->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
1301  ff_h264_field_end(h, 1);
1302  }
1303 
1304  h0->current_slice = 0;
1305  if (!h0->first_field) {
1306  if (h->cur_pic_ptr && !h->droppable) {
1307  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1308  h->picture_structure == PICT_BOTTOM_FIELD);
1309  }
1310  h->cur_pic_ptr = NULL;
1311  }
1312  }
1313 
1314  slice_type = get_ue_golomb_31(&h->gb);
1315  if (slice_type > 9) {
1316  av_log(h->avctx, AV_LOG_ERROR,
1317  "slice type %d too large at %d %d\n",
1318  slice_type, h->mb_x, h->mb_y);
1319  return AVERROR_INVALIDDATA;
1320  }
1321  if (slice_type > 4) {
1322  slice_type -= 5;
1323  h->slice_type_fixed = 1;
1324  } else
1325  h->slice_type_fixed = 0;
1326 
1327  slice_type = golomb_to_pict_type[slice_type];
1328  h->slice_type = slice_type;
1329  h->slice_type_nos = slice_type & 3;
1330 
1331  if (h->nal_unit_type == NAL_IDR_SLICE &&
1332  h->slice_type_nos != AV_PICTURE_TYPE_I) {
1333  av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1334  return AVERROR_INVALIDDATA;
1335  }
1336 
1337  if (
1338  (h->avctx->skip_frame >= AVDISCARD_NONREF && !h->nal_ref_idc) ||
1339  (h->avctx->skip_frame >= AVDISCARD_BIDIR && h->slice_type_nos == AV_PICTURE_TYPE_B) ||
1340  (h->avctx->skip_frame >= AVDISCARD_NONINTRA && h->slice_type_nos != AV_PICTURE_TYPE_I) ||
1341  (h->avctx->skip_frame >= AVDISCARD_NONKEY && h->nal_unit_type != NAL_IDR_SLICE) ||
1342  h->avctx->skip_frame >= AVDISCARD_ALL) {
1343  return SLICE_SKIPED;
1344  }
1345 
1346  // to make a few old functions happy, it's wrong though
1347  h->pict_type = h->slice_type;
1348 
1349  pps_id = get_ue_golomb(&h->gb);
1350  if (pps_id >= MAX_PPS_COUNT) {
1351  av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
1352  return AVERROR_INVALIDDATA;
1353  }
1354  if (!h0->pps_buffers[pps_id]) {
1355  av_log(h->avctx, AV_LOG_ERROR,
1356  "non-existing PPS %u referenced\n",
1357  pps_id);
1358  return AVERROR_INVALIDDATA;
1359  }
1360  if (h0->au_pps_id >= 0 && pps_id != h0->au_pps_id) {
1361  av_log(h->avctx, AV_LOG_ERROR,
1362  "PPS change from %d to %d forbidden\n",
1363  h0->au_pps_id, pps_id);
1364  return AVERROR_INVALIDDATA;
1365  }
1366 
1367  pps = h0->pps_buffers[pps_id];
1368 
1369  if (!h0->sps_buffers[pps->sps_id]) {
1370  av_log(h->avctx, AV_LOG_ERROR,
1371  "non-existing SPS %u referenced\n",
1372  h->pps.sps_id);
1373  return AVERROR_INVALIDDATA;
1374  }
1375  if (first_slice)
1376  h->pps = *h0->pps_buffers[pps_id];
1377 
1378  if (pps->sps_id != h->sps.sps_id ||
1379  pps->sps_id != h->current_sps_id ||
1380  h0->sps_buffers[pps->sps_id]->new) {
1381 
1382  if (!first_slice) {
1383  av_log(h->avctx, AV_LOG_ERROR,
1384  "SPS changed in the middle of the frame\n");
1385  return AVERROR_INVALIDDATA;
1386  }
1387 
1388  h->sps = *h0->sps_buffers[h->pps.sps_id];
1389 
1390  if (h->mb_width != h->sps.mb_width ||
1391  h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) ||
1392  h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
1393  h->cur_chroma_format_idc != h->sps.chroma_format_idc
1394  )
1395  needs_reinit = 1;
1396 
1397  if (h->bit_depth_luma != h->sps.bit_depth_luma ||
1398  h->chroma_format_idc != h->sps.chroma_format_idc) {
1399  h->bit_depth_luma = h->sps.bit_depth_luma;
1400  h->chroma_format_idc = h->sps.chroma_format_idc;
1401  needs_reinit = 1;
1402  }
1403  if ((ret = ff_h264_set_parameter_from_sps(h)) < 0)
1404  return ret;
1405  }
1406 
1407  h->avctx->profile = ff_h264_get_profile(&h->sps);
1408  h->avctx->level = h->sps.level_idc;
1409  h->avctx->refs = h->sps.ref_frame_count;
1410 
1411  must_reinit = (h->context_initialized &&
1412  ( 16*h->sps.mb_width != h->avctx->coded_width
1413  || 16*h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) != h->avctx->coded_height
1414  || h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
1415  || h->cur_chroma_format_idc != h->sps.chroma_format_idc
1416  || h->mb_width != h->sps.mb_width
1417  || h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag)
1418  ));
1419  if (non_j_pixfmt(h0->avctx->pix_fmt) != non_j_pixfmt(get_pixel_format(h0, 0)))
1420  must_reinit = 1;
1421 
1422  if (first_slice && av_cmp_q(h->sps.sar, h->avctx->sample_aspect_ratio))
1423  must_reinit = 1;
1424 
1425  h->mb_width = h->sps.mb_width;
1426  h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1427  h->mb_num = h->mb_width * h->mb_height;
1428  h->mb_stride = h->mb_width + 1;
1429 
1430  h->b_stride = h->mb_width * 4;
1431 
1432  h->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
1433 
1434  h->width = 16 * h->mb_width;
1435  h->height = 16 * h->mb_height;
1436 
1437  ret = init_dimensions(h);
1438  if (ret < 0)
1439  return ret;
1440 
1441  if (h->sps.video_signal_type_present_flag) {
1442  h->avctx->color_range = h->sps.full_range>0 ? AVCOL_RANGE_JPEG
1443  : AVCOL_RANGE_MPEG;
1444  if (h->sps.colour_description_present_flag) {
1445  if (h->avctx->colorspace != h->sps.colorspace)
1446  needs_reinit = 1;
1447  h->avctx->color_primaries = h->sps.color_primaries;
1448  h->avctx->color_trc = h->sps.color_trc;
1449  h->avctx->colorspace = h->sps.colorspace;
1450  }
1451  }
1452 
1453  if (h->context_initialized &&
1454  (must_reinit || needs_reinit)) {
1455  if (h != h0) {
1456  av_log(h->avctx, AV_LOG_ERROR,
1457  "changing width %d -> %d / height %d -> %d on "
1458  "slice %d\n",
1459  h->width, h->avctx->coded_width,
1460  h->height, h->avctx->coded_height,
1461  h0->current_slice + 1);
1462  return AVERROR_INVALIDDATA;
1463  }
1464 
1465  av_assert1(first_slice);
1466 
1467  ff_h264_flush_change(h);
1468 
1469  if ((ret = get_pixel_format(h, 1)) < 0)
1470  return ret;
1471  h->avctx->pix_fmt = ret;
1472 
1473  av_log(h->avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
1474  "pix_fmt: %s\n", h->width, h->height, av_get_pix_fmt_name(h->avctx->pix_fmt));
1475 
1476  if ((ret = h264_slice_header_init(h, 1)) < 0) {
1477  av_log(h->avctx, AV_LOG_ERROR,
1478  "h264_slice_header_init() failed\n");
1479  return ret;
1480  }
1481  }
1482  if (!h->context_initialized) {
1483  if (h != h0) {
1484  av_log(h->avctx, AV_LOG_ERROR,
1485  "Cannot (re-)initialize context during parallel decoding.\n");
1486  return AVERROR_PATCHWELCOME;
1487  }
1488 
1489  if ((ret = get_pixel_format(h, 1)) < 0)
1490  return ret;
1491  h->avctx->pix_fmt = ret;
1492 
1493  if ((ret = h264_slice_header_init(h, 0)) < 0) {
1494  av_log(h->avctx, AV_LOG_ERROR,
1495  "h264_slice_header_init() failed\n");
1496  return ret;
1497  }
1498  }
1499 
1500  if (first_slice && h->dequant_coeff_pps != pps_id) {
1501  h->dequant_coeff_pps = pps_id;
1502  ff_h264_init_dequant_tables(h);
1503  }
1504 
1505  frame_num = get_bits(&h->gb, h->sps.log2_max_frame_num);
1506  if (!first_slice) {
1507  if (h0->frame_num != frame_num) {
1508  av_log(h->avctx, AV_LOG_ERROR, "Frame num change from %d to %d\n",
1509  h0->frame_num, frame_num);
1510  return AVERROR_INVALIDDATA;
1511  }
1512  }
1513 
1514  h->mb_mbaff = 0;
1515  h->mb_aff_frame = 0;
1516  last_pic_structure = h0->picture_structure;
1517  last_pic_droppable = h0->droppable;
1518  droppable = h->nal_ref_idc == 0;
1519  if (h->sps.frame_mbs_only_flag) {
1520  picture_structure = PICT_FRAME;
1521  } else {
1522  if (!h->sps.direct_8x8_inference_flag && slice_type == AV_PICTURE_TYPE_B) {
1523  av_log(h->avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
1524  return -1;
1525  }
1526  field_pic_flag = get_bits1(&h->gb);
1527 
1528  if (field_pic_flag) {
1529  bottom_field_flag = get_bits1(&h->gb);
1530  picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1531  } else {
1532  picture_structure = PICT_FRAME;
1533  h->mb_aff_frame = h->sps.mb_aff;
1534  }
1535  }
1536  if (h0->current_slice) {
1537  if (last_pic_structure != picture_structure ||
1538  last_pic_droppable != droppable) {
1539  av_log(h->avctx, AV_LOG_ERROR,
1540  "Changing field mode (%d -> %d) between slices is not allowed\n",
1541  last_pic_structure, h->picture_structure);
1542  return AVERROR_INVALIDDATA;
1543  } else if (!h0->cur_pic_ptr) {
1544  av_log(h->avctx, AV_LOG_ERROR,
1545  "unset cur_pic_ptr on slice %d\n",
1546  h0->current_slice + 1);
1547  return AVERROR_INVALIDDATA;
1548  }
1549  }
1550 
1551  h->picture_structure = picture_structure;
1552  h->droppable = droppable;
1553  h->frame_num = frame_num;
1554  h->mb_field_decoding_flag = picture_structure != PICT_FRAME;
1555 
1556  if (h0->current_slice == 0) {
1557  /* Shorten frame num gaps so we don't have to allocate reference
1558  * frames just to throw them away */
1559  if (h->frame_num != h->prev_frame_num) {
1560  int unwrap_prev_frame_num = h->prev_frame_num;
1561  int max_frame_num = 1 << h->sps.log2_max_frame_num;
1562 
1563  if (unwrap_prev_frame_num > h->frame_num)
1564  unwrap_prev_frame_num -= max_frame_num;
1565 
1566  if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
1567  unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
1568  if (unwrap_prev_frame_num < 0)
1569  unwrap_prev_frame_num += max_frame_num;
1570 
1571  h->prev_frame_num = unwrap_prev_frame_num;
1572  }
1573  }
1574 
1575  /* See if we have a decoded first field looking for a pair...
1576  * Here, we're using that to see if we should mark previously
1577  * decode frames as "finished".
1578  * We have to do that before the "dummy" in-between frame allocation,
1579  * since that can modify h->cur_pic_ptr. */
1580  if (h0->first_field) {
1581  assert(h0->cur_pic_ptr);
1582  assert(h0->cur_pic_ptr->f.buf[0]);
1583  assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
1584 
1585  /* Mark old field/frame as completed */
1586  if (h0->cur_pic_ptr->tf.owner == h0->avctx) {
1587  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1588  last_pic_structure == PICT_BOTTOM_FIELD);
1589  }
1590 
1591  /* figure out if we have a complementary field pair */
1592  if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1593  /* Previous field is unmatched. Don't display it, but let it
1594  * remain for reference if marked as such. */
1595  if (last_pic_structure != PICT_FRAME) {
1596  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1597  last_pic_structure == PICT_TOP_FIELD);
1598  }
1599  } else {
1600  if (h0->cur_pic_ptr->frame_num != h->frame_num) {
1601  /* This and previous field were reference, but had
1602  * different frame_nums. Consider this field first in
1603  * pair. Throw away previous field except for reference
1604  * purposes. */
1605  if (last_pic_structure != PICT_FRAME) {
1606  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1607  last_pic_structure == PICT_TOP_FIELD);
1608  }
1609  } else {
1610  /* Second field in complementary pair */
1611  if (!((last_pic_structure == PICT_TOP_FIELD &&
1612  h->picture_structure == PICT_BOTTOM_FIELD) ||
1613  (last_pic_structure == PICT_BOTTOM_FIELD &&
1614  h->picture_structure == PICT_TOP_FIELD))) {
1615  av_log(h->avctx, AV_LOG_ERROR,
1616  "Invalid field mode combination %d/%d\n",
1617  last_pic_structure, h->picture_structure);
1618  h->picture_structure = last_pic_structure;
1619  h->droppable = last_pic_droppable;
1620  return AVERROR_INVALIDDATA;
1621  } else if (last_pic_droppable != h->droppable) {
1622  avpriv_request_sample(h->avctx,
1623  "Found reference and non-reference fields in the same frame, which");
1624  h->picture_structure = last_pic_structure;
1625  h->droppable = last_pic_droppable;
1626  return AVERROR_PATCHWELCOME;
1627  }
1628  }
1629  }
1630  }
1631 
1632  while (h->frame_num != h->prev_frame_num && !h0->first_field &&
1633  h->frame_num != (h->prev_frame_num + 1) % (1 << h->sps.log2_max_frame_num)) {
1634  H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1635  av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
1636  h->frame_num, h->prev_frame_num);
1637  if (!h->sps.gaps_in_frame_num_allowed_flag)
1638  for(i=0; i<FF_ARRAY_ELEMS(h->last_pocs); i++)
1639  h->last_pocs[i] = INT_MIN;
1640  ret = h264_frame_start(h);
1641  if (ret < 0) {
1642  h0->first_field = 0;
1643  return ret;
1644  }
1645 
1646  h->prev_frame_num++;
1647  h->prev_frame_num %= 1 << h->sps.log2_max_frame_num;
1648  h->cur_pic_ptr->frame_num = h->prev_frame_num;
1649  h->cur_pic_ptr->invalid_gap = !h->sps.gaps_in_frame_num_allowed_flag;
1650  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
1651  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
1652  ret = ff_generate_sliding_window_mmcos(h, 1);
1653  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1654  return ret;
1655  ret = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1656  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1657  return ret;
1658  /* Error concealment: If a ref is missing, copy the previous ref
1659  * in its place.
1660  * FIXME: Avoiding a memcpy would be nice, but ref handling makes
1661  * many assumptions about there being no actual duplicates.
1662  * FIXME: This does not copy padding for out-of-frame motion
1663  * vectors. Given we are concealing a lost frame, this probably
1664  * is not noticeable by comparison, but it should be fixed. */
1665  if (h->short_ref_count) {
1666  if (prev) {
1667  av_image_copy(h->short_ref[0]->f.data,
1668  h->short_ref[0]->f.linesize,
1669  (const uint8_t **)prev->f.data,
1670  prev->f.linesize,
1671  h->avctx->pix_fmt,
1672  h->mb_width * 16,
1673  h->mb_height * 16);
1674  h->short_ref[0]->poc = prev->poc + 2;
1675  }
1676  h->short_ref[0]->frame_num = h->prev_frame_num;
1677  }
1678  }
1679 
1680  /* See if we have a decoded first field looking for a pair...
1681  * We're using that to see whether to continue decoding in that
1682  * frame, or to allocate a new one. */
1683  if (h0->first_field) {
1684  assert(h0->cur_pic_ptr);
1685  assert(h0->cur_pic_ptr->f.buf[0]);
1686  assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
1687 
1688  /* figure out if we have a complementary field pair */
1689  if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1690  /* Previous field is unmatched. Don't display it, but let it
1691  * remain for reference if marked as such. */
1692  h0->missing_fields ++;
1693  h0->cur_pic_ptr = NULL;
1694  h0->first_field = FIELD_PICTURE(h);
1695  } else {
1696  h0->missing_fields = 0;
1697  if (h0->cur_pic_ptr->frame_num != h->frame_num) {
1698  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1699  h0->picture_structure==PICT_BOTTOM_FIELD);
1700  /* This and the previous field had different frame_nums.
1701  * Consider this field first in pair. Throw away previous
1702  * one except for reference purposes. */
1703  h0->first_field = 1;
1704  h0->cur_pic_ptr = NULL;
1705  } else {
1706  /* Second field in complementary pair */
1707  h0->first_field = 0;
1708  }
1709  }
1710  } else {
1711  /* Frame or first field in a potentially complementary pair */
1712  h0->first_field = FIELD_PICTURE(h);
1713  }
1714 
1715  if (!FIELD_PICTURE(h) || h0->first_field) {
1716  if (h264_frame_start(h) < 0) {
1717  h0->first_field = 0;
1718  return AVERROR_INVALIDDATA;
1719  }
1720  } else {
1721  release_unused_pictures(h, 0);
1722  }
1723  /* Some macroblocks can be accessed before they're available in case
1724  * of lost slices, MBAFF or threading. */
1725  if (FIELD_PICTURE(h)) {
1726  for(i = (h->picture_structure == PICT_BOTTOM_FIELD); i<h->mb_height; i++)
1727  memset(h->slice_table + i*h->mb_stride, -1, (h->mb_stride - (i+1==h->mb_height)) * sizeof(*h->slice_table));
1728  } else {
1729  memset(h->slice_table, -1,
1730  (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
1731  }
1732  h0->last_slice_type = -1;
1733  }
1734  if (h != h0 && (ret = clone_slice(h, h0)) < 0)
1735  return ret;
1736 
1737  /* can't be in alloc_tables because linesize isn't known there.
1738  * FIXME: redo bipred weight to not require extra buffer? */
1739  for (i = 0; i < h->slice_context_count; i++)
1740  if (h->thread_context[i]) {
1741  ret = alloc_scratch_buffers(h->thread_context[i], h->linesize);
1742  if (ret < 0)
1743  return ret;
1744  }
1745 
1746  h->cur_pic_ptr->frame_num = h->frame_num; // FIXME frame_num cleanup
1747 
1748  av_assert1(h->mb_num == h->mb_width * h->mb_height);
1749  if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
1750  first_mb_in_slice >= h->mb_num) {
1751  av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1752  return AVERROR_INVALIDDATA;
1753  }
1754  h->resync_mb_x = h->mb_x = first_mb_in_slice % h->mb_width;
1755  h->resync_mb_y = h->mb_y = (first_mb_in_slice / h->mb_width) <<
1756  FIELD_OR_MBAFF_PICTURE(h);
1757  if (h->picture_structure == PICT_BOTTOM_FIELD)
1758  h->resync_mb_y = h->mb_y = h->mb_y + 1;
1759  av_assert1(h->mb_y < h->mb_height);
1760 
1761  if (h->picture_structure == PICT_FRAME) {
1762  h->curr_pic_num = h->frame_num;
1763  h->max_pic_num = 1 << h->sps.log2_max_frame_num;
1764  } else {
1765  h->curr_pic_num = 2 * h->frame_num + 1;
1766  h->max_pic_num = 1 << (h->sps.log2_max_frame_num + 1);
1767  }
1768 
1769  if (h->nal_unit_type == NAL_IDR_SLICE)
1770  get_ue_golomb(&h->gb); /* idr_pic_id */
1771 
1772  if (h->sps.poc_type == 0) {
1773  h->poc_lsb = get_bits(&h->gb, h->sps.log2_max_poc_lsb);
1774 
1775  if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1776  h->delta_poc_bottom = get_se_golomb(&h->gb);
1777  }
1778 
1779  if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
1780  h->delta_poc[0] = get_se_golomb(&h->gb);
1781 
1782  if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1783  h->delta_poc[1] = get_se_golomb(&h->gb);
1784  }
1785 
1786  ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
1787 
1788  if (h->pps.redundant_pic_cnt_present)
1789  h->redundant_pic_count = get_ue_golomb(&h->gb);
1790 
1791  ret = ff_set_ref_count(h);
1792  if (ret < 0)
1793  return ret;
1794 
1795  if (slice_type != AV_PICTURE_TYPE_I &&
1796  (h0->current_slice == 0 ||
1797  slice_type != h0->last_slice_type ||
1798  memcmp(h0->last_ref_count, h0->ref_count, sizeof(h0->ref_count)))) {
1799 
1800  ff_h264_fill_default_ref_list(h);
1801  }
1802 
1803  if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
1804  ret = ff_h264_decode_ref_pic_list_reordering(h);
1805  if (ret < 0) {
1806  h->ref_count[1] = h->ref_count[0] = 0;
1807  return ret;
1808  }
1809  }
1810 
1811  if ((h->pps.weighted_pred && h->slice_type_nos == AV_PICTURE_TYPE_P) ||
1812  (h->pps.weighted_bipred_idc == 1 &&
1813  h->slice_type_nos == AV_PICTURE_TYPE_B))
1814  ff_pred_weight_table(h);
1815  else if (h->pps.weighted_bipred_idc == 2 &&
1816  h->slice_type_nos == AV_PICTURE_TYPE_B) {
1817  implicit_weight_table(h, -1);
1818  } else {
1819  h->use_weight = 0;
1820  for (i = 0; i < 2; i++) {
1821  h->luma_weight_flag[i] = 0;
1822  h->chroma_weight_flag[i] = 0;
1823  }
1824  }
1825 
1826  // If frame-mt is enabled, only update mmco tables for the first slice
1827  // in a field. Subsequent slices can temporarily clobber h->mmco_index
1828  // or h->mmco, which will cause ref list mix-ups and decoding errors
1829  // further down the line. This may break decoding if the first slice is
1830  // corrupt, thus we only do this if frame-mt is enabled.
1831  if (h->nal_ref_idc) {
1832  ret = ff_h264_decode_ref_pic_marking(h0, &h->gb,
1833  !(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
1834  h0->current_slice == 0);
1835  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1836  return AVERROR_INVALIDDATA;
1837  }
1838 
1839  if (FRAME_MBAFF(h)) {
1840  ff_h264_fill_mbaff_ref_list(h);
1841 
1842  if (h->pps.weighted_bipred_idc == 2 && h->slice_type_nos == AV_PICTURE_TYPE_B) {
1843  implicit_weight_table(h, 0);
1844  implicit_weight_table(h, 1);
1845  }
1846  }
1847 
1848  if (h->slice_type_nos == AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
1849  ff_h264_direct_dist_scale_factor(h);
1850  ff_h264_direct_ref_list_init(h);
1851 
1852  if (h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac) {
1853  tmp = get_ue_golomb_31(&h->gb);
1854  if (tmp > 2) {
1855  av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1856  return AVERROR_INVALIDDATA;
1857  }
1858  h->cabac_init_idc = tmp;
1859  }
1860 
1861  h->last_qscale_diff = 0;
1862  tmp = h->pps.init_qp + get_se_golomb(&h->gb);
1863  if (tmp > 51 + 6 * (h->sps.bit_depth_luma - 8)) {
1864  av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1865  return AVERROR_INVALIDDATA;
1866  }
1867  h->qscale = tmp;
1868  h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
1869  h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
1870  // FIXME qscale / qp ... stuff
1871  if (h->slice_type == AV_PICTURE_TYPE_SP)
1872  get_bits1(&h->gb); /* sp_for_switch_flag */
1873  if (h->slice_type == AV_PICTURE_TYPE_SP ||
1874  h->slice_type == AV_PICTURE_TYPE_SI)
1875  get_se_golomb(&h->gb); /* slice_qs_delta */
1876 
1877  h->deblocking_filter = 1;
1878  h->slice_alpha_c0_offset = 0;
1879  h->slice_beta_offset = 0;
1880  if (h->pps.deblocking_filter_parameters_present) {
1881  tmp = get_ue_golomb_31(&h->gb);
1882  if (tmp > 2) {
1883  av_log(h->avctx, AV_LOG_ERROR,
1884  "deblocking_filter_idc %u out of range\n", tmp);
1885  return AVERROR_INVALIDDATA;
1886  }
1887  h->deblocking_filter = tmp;
1888  if (h->deblocking_filter < 2)
1889  h->deblocking_filter ^= 1; // 1<->0
1890 
1891  if (h->deblocking_filter) {
1892  h->slice_alpha_c0_offset = get_se_golomb(&h->gb) * 2;
1893  h->slice_beta_offset = get_se_golomb(&h->gb) * 2;
1894  if (h->slice_alpha_c0_offset > 12 ||
1895  h->slice_alpha_c0_offset < -12 ||
1896  h->slice_beta_offset > 12 ||
1897  h->slice_beta_offset < -12) {
1898  av_log(h->avctx, AV_LOG_ERROR,
1899  "deblocking filter parameters %d %d out of range\n",
1900  h->slice_alpha_c0_offset, h->slice_beta_offset);
1901  return AVERROR_INVALIDDATA;
1902  }
1903  }
1904  }
1905 
1906  if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
1907  (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1908  h->nal_unit_type != NAL_IDR_SLICE) ||
1909  (h->avctx->skip_loop_filter >= AVDISCARD_NONINTRA &&
1910  h->slice_type_nos != AV_PICTURE_TYPE_I) ||
1911  (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
1912  h->slice_type_nos == AV_PICTURE_TYPE_B) ||
1913  (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1914  h->nal_ref_idc == 0))
1915  h->deblocking_filter = 0;
1916 
1917  if (h->deblocking_filter == 1 && h0->max_contexts > 1) {
1918  if (h->avctx->flags2 & CODEC_FLAG2_FAST) {
1919  /* Cheat slightly for speed:
1920  * Do not bother to deblock across slices. */
1921  h->deblocking_filter = 2;
1922  } else {
1923  h0->max_contexts = 1;
1924  if (!h0->single_decode_warning) {
1925  av_log(h->avctx, AV_LOG_INFO,
1926  "Cannot parallelize slice decoding with deblocking filter type 1, decoding such frames in sequential order\n"
1927  "To parallelize slice decoding you need video encoded with disable_deblocking_filter_idc set to 2 (deblock only edges that do not cross slices).\n"
1928  "Setting the flags2 libavcodec option to +fast (-flags2 +fast) will disable deblocking across slices and enable parallel slice decoding "
1929  "but will generate non-standard-compliant output.\n");
1930  h0->single_decode_warning = 1;
1931  }
1932  if (h != h0) {
1933  av_log(h->avctx, AV_LOG_ERROR,
1934  "Deblocking switched inside frame.\n");
1935  return SLICE_SINGLETHREAD;
1936  }
1937  }
1938  }
1939  h->qp_thresh = 15 -
1940  FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) -
1941  FFMAX3(0,
1942  h->pps.chroma_qp_index_offset[0],
1943  h->pps.chroma_qp_index_offset[1]) +
1944  6 * (h->sps.bit_depth_luma - 8);
1945 
1946  h0->last_slice_type = slice_type;
1947  memcpy(h0->last_ref_count, h0->ref_count, sizeof(h0->last_ref_count));
1948  h->slice_num = ++h0->current_slice;
1949 
1950  if (h->slice_num)
1951  h0->slice_row[(h->slice_num-1)&(MAX_SLICES-1)]= h->resync_mb_y;
1952  if ( h0->slice_row[h->slice_num&(MAX_SLICES-1)] + 3 >= h->resync_mb_y
1953  && h0->slice_row[h->slice_num&(MAX_SLICES-1)] <= h->resync_mb_y
1954  && h->slice_num >= MAX_SLICES) {
1955  //in case of ASO this check needs to be updated depending on how we decide to assign slice numbers in this case
1956  av_log(h->avctx, AV_LOG_WARNING, "Possibly too many slices (%d >= %d), increase MAX_SLICES and recompile if there are artifacts\n", h->slice_num, MAX_SLICES);
1957  }
1958 
1959  for (j = 0; j < 2; j++) {
1960  int id_list[16];
1961  int *ref2frm = h->ref2frm[h->slice_num & (MAX_SLICES - 1)][j];
1962  for (i = 0; i < 16; i++) {
1963  id_list[i] = 60;
1964  if (j < h->list_count && i < h->ref_count[j] &&
1965  h->ref_list[j][i].f.buf[0]) {
1966  int k;
1967  AVBuffer *buf = h->ref_list[j][i].f.buf[0]->buffer;
1968  for (k = 0; k < h->short_ref_count; k++)
1969  if (h->short_ref[k]->f.buf[0]->buffer == buf) {
1970  id_list[i] = k;
1971  break;
1972  }
1973  for (k = 0; k < h->long_ref_count; k++)
1974  if (h->long_ref[k] && h->long_ref[k]->f.buf[0]->buffer == buf) {
1975  id_list[i] = h->short_ref_count + k;
1976  break;
1977  }
1978  }
1979  }
1980 
1981  ref2frm[0] =
1982  ref2frm[1] = -1;
1983  for (i = 0; i < 16; i++)
1984  ref2frm[i + 2] = 4 * id_list[i] + (h->ref_list[j][i].reference & 3);
1985  ref2frm[18 + 0] =
1986  ref2frm[18 + 1] = -1;
1987  for (i = 16; i < 48; i++)
1988  ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1989  (h->ref_list[j][i].reference & 3);
1990  }
1991 
1992  h0->au_pps_id = pps_id;
1993  h->sps.new =
1994  h0->sps_buffers[h->pps.sps_id]->new = 0;
1995  h->current_sps_id = h->pps.sps_id;
1996 
1997  if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
1998  av_log(h->avctx, AV_LOG_DEBUG,
1999  "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",
2000  h->slice_num,
2001  (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
2002  first_mb_in_slice,
2003  av_get_picture_type_char(h->slice_type),
2004  h->slice_type_fixed ? " fix" : "",
2005  h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2006  pps_id, h->frame_num,
2007  h->cur_pic_ptr->field_poc[0],
2008  h->cur_pic_ptr->field_poc[1],
2009  h->ref_count[0], h->ref_count[1],
2010  h->qscale,
2011  h->deblocking_filter,
2012  h->slice_alpha_c0_offset, h->slice_beta_offset,
2013  h->use_weight,
2014  h->use_weight == 1 && h->use_weight_chroma ? "c" : "",
2015  h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
2016  }
2017 
2018  return 0;
2019 }
2020 
2021 int ff_h264_get_slice_type(const H264Context *h)
2022 {
2023  switch (h->slice_type) {
2024  case AV_PICTURE_TYPE_P:
2025  return 0;
2026  case AV_PICTURE_TYPE_B:
2027  return 1;
2028  case AV_PICTURE_TYPE_I:
2029  return 2;
2030  case AV_PICTURE_TYPE_SP:
2031  return 3;
2032  case AV_PICTURE_TYPE_SI:
2033  return 4;
2034  default:
2035  return AVERROR_INVALIDDATA;
2036  }
2037 }
2038 
2039 static av_always_inline void fill_filter_caches_inter(H264Context *h,
2040  int mb_type, int top_xy,
2041  int left_xy[LEFT_MBS],
2042  int top_type,
2043  int left_type[LEFT_MBS],
2044  int mb_xy, int list)
2045 {
2046  int b_stride = h->b_stride;
2047  int16_t(*mv_dst)[2] = &h->mv_cache[list][scan8[0]];
2048  int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
2049  if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
2050  if (USES_LIST(top_type, list)) {
2051  const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
2052  const int b8_xy = 4 * top_xy + 2;
2053  int (*ref2frm)[64] = (void*)(h->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2054  AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
2055  ref_cache[0 - 1 * 8] =
2056  ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
2057  ref_cache[2 - 1 * 8] =
2058  ref_cache[3 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 1]];
2059  } else {
2060  AV_ZERO128(mv_dst - 1 * 8);
2061  AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2062  }
2063 
2064  if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
2065  if (USES_LIST(left_type[LTOP], list)) {
2066  const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
2067  const int b8_xy = 4 * left_xy[LTOP] + 1;
2068  int (*ref2frm)[64] =(void*)( h->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2069  AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
2070  AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
2071  AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
2072  AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
2073  ref_cache[-1 + 0] =
2074  ref_cache[-1 + 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
2075  ref_cache[-1 + 16] =
2076  ref_cache[-1 + 24] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
2077  } else {
2078  AV_ZERO32(mv_dst - 1 + 0);
2079  AV_ZERO32(mv_dst - 1 + 8);
2080  AV_ZERO32(mv_dst - 1 + 16);
2081  AV_ZERO32(mv_dst - 1 + 24);
2082  ref_cache[-1 + 0] =
2083  ref_cache[-1 + 8] =
2084  ref_cache[-1 + 16] =
2085  ref_cache[-1 + 24] = LIST_NOT_USED;
2086  }
2087  }
2088  }
2089 
2090  if (!USES_LIST(mb_type, list)) {
2091  fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
2092  AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2093  AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2094  AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2095  AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2096  return;
2097  }
2098 
2099  {
2100  int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
2101  int (*ref2frm)[64] = (void*)(h->ref2frm[h->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2102  uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
2103  uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
2104  AV_WN32A(&ref_cache[0 * 8], ref01);
2105  AV_WN32A(&ref_cache[1 * 8], ref01);
2106  AV_WN32A(&ref_cache[2 * 8], ref23);
2107  AV_WN32A(&ref_cache[3 * 8], ref23);
2108  }
2109 
2110  {
2111  int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * h->mb_x + 4 * h->mb_y * b_stride];
2112  AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
2113  AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
2114  AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
2115  AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
2116  }
2117 }
2118 
2119 /**
2120  *
2121  * @return non zero if the loop filter can be skipped
2122  */
2123 static int fill_filter_caches(H264Context *h, int mb_type)
2124 {
2125  const int mb_xy = h->mb_xy;
2126  int top_xy, left_xy[LEFT_MBS];
2127  int top_type, left_type[LEFT_MBS];
2128  uint8_t *nnz;
2129  uint8_t *nnz_cache;
2130 
2131  top_xy = mb_xy - (h->mb_stride << MB_FIELD(h));
2132 
2133  /* Wow, what a mess, why didn't they simplify the interlacing & intra
2134  * stuff, I can't imagine that these complex rules are worth it. */
2135 
2136  left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
2137  if (FRAME_MBAFF(h)) {
2138  const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
2139  const int curr_mb_field_flag = IS_INTERLACED(mb_type);
2140  if (h->mb_y & 1) {
2141  if (left_mb_field_flag != curr_mb_field_flag)
2142  left_xy[LTOP] -= h->mb_stride;
2143  } else {
2144  if (curr_mb_field_flag)
2145  top_xy += h->mb_stride &
2146  (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
2147  if (left_mb_field_flag != curr_mb_field_flag)
2148  left_xy[LBOT] += h->mb_stride;
2149  }
2150  }
2151 
2152  h->top_mb_xy = top_xy;
2153  h->left_mb_xy[LTOP] = left_xy[LTOP];
2154  h->left_mb_xy[LBOT] = left_xy[LBOT];
2155  {
2156  /* For sufficiently low qp, filtering wouldn't do anything.
2157  * This is a conservative estimate: could also check beta_offset
2158  * and more accurate chroma_qp. */
2159  int qp_thresh = h->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
2160  int qp = h->cur_pic.qscale_table[mb_xy];
2161  if (qp <= qp_thresh &&
2162  (left_xy[LTOP] < 0 ||
2163  ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
2164  (top_xy < 0 ||
2165  ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
2166  if (!FRAME_MBAFF(h))
2167  return 1;
2168  if ((left_xy[LTOP] < 0 ||
2169  ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
2170  (top_xy < h->mb_stride ||
2171  ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
2172  return 1;
2173  }
2174  }
2175 
2176  top_type = h->cur_pic.mb_type[top_xy];
2177  left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
2178  left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
2179  if (h->deblocking_filter == 2) {
2180  if (h->slice_table[top_xy] != h->slice_num)
2181  top_type = 0;
2182  if (h->slice_table[left_xy[LBOT]] != h->slice_num)
2183  left_type[LTOP] = left_type[LBOT] = 0;
2184  } else {
2185  if (h->slice_table[top_xy] == 0xFFFF)
2186  top_type = 0;
2187  if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
2188  left_type[LTOP] = left_type[LBOT] = 0;
2189  }
2190  h->top_type = top_type;
2191  h->left_type[LTOP] = left_type[LTOP];
2192  h->left_type[LBOT] = left_type[LBOT];
2193 
2194  if (IS_INTRA(mb_type))
2195  return 0;
2196 
2197  fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
2198  top_type, left_type, mb_xy, 0);
2199  if (h->list_count == 2)
2200  fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
2201  top_type, left_type, mb_xy, 1);
2202 
2203  nnz = h->non_zero_count[mb_xy];
2204  nnz_cache = h->non_zero_count_cache;
2205  AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
2206  AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
2207  AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
2208  AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
2209  h->cbp = h->cbp_table[mb_xy];
2210 
2211  if (top_type) {
2212  nnz = h->non_zero_count[top_xy];
2213  AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
2214  }
2215 
2216  if (left_type[LTOP]) {
2217  nnz = h->non_zero_count[left_xy[LTOP]];
2218  nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
2219  nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
2220  nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
2221  nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
2222  }
2223 
2224  /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
2225  * from what the loop filter needs */
2226  if (!CABAC(h) && h->pps.transform_8x8_mode) {
2227  if (IS_8x8DCT(top_type)) {
2228  nnz_cache[4 + 8 * 0] =
2229  nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
2230  nnz_cache[6 + 8 * 0] =
2231  nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
2232  }
2233  if (IS_8x8DCT(left_type[LTOP])) {
2234  nnz_cache[3 + 8 * 1] =
2235  nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
2236  }
2237  if (IS_8x8DCT(left_type[LBOT])) {
2238  nnz_cache[3 + 8 * 3] =
2239  nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
2240  }
2241 
2242  if (IS_8x8DCT(mb_type)) {
2243  nnz_cache[scan8[0]] =
2244  nnz_cache[scan8[1]] =
2245  nnz_cache[scan8[2]] =
2246  nnz_cache[scan8[3]] = (h->cbp & 0x1000) >> 12;
2247 
2248  nnz_cache[scan8[0 + 4]] =
2249  nnz_cache[scan8[1 + 4]] =
2250  nnz_cache[scan8[2 + 4]] =
2251  nnz_cache[scan8[3 + 4]] = (h->cbp & 0x2000) >> 12;
2252 
2253  nnz_cache[scan8[0 + 8]] =
2254  nnz_cache[scan8[1 + 8]] =
2255  nnz_cache[scan8[2 + 8]] =
2256  nnz_cache[scan8[3 + 8]] = (h->cbp & 0x4000) >> 12;
2257 
2258  nnz_cache[scan8[0 + 12]] =
2259  nnz_cache[scan8[1 + 12]] =
2260  nnz_cache[scan8[2 + 12]] =
2261  nnz_cache[scan8[3 + 12]] = (h->cbp & 0x8000) >> 12;
2262  }
2263  }
2264 
2265  return 0;
2266 }
2267 
2268 static void loop_filter(H264Context *h, int start_x, int end_x)
2269 {
2270  uint8_t *dest_y, *dest_cb, *dest_cr;
2271  int linesize, uvlinesize, mb_x, mb_y;
2272  const int end_mb_y = h->mb_y + FRAME_MBAFF(h);
2273  const int old_slice_type = h->slice_type;
2274  const int pixel_shift = h->pixel_shift;
2275  const int block_h = 16 >> h->chroma_y_shift;
2276 
2277  if (h->deblocking_filter) {
2278  for (mb_x = start_x; mb_x < end_x; mb_x++)
2279  for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
2280  int mb_xy, mb_type;
2281  mb_xy = h->mb_xy = mb_x + mb_y * h->mb_stride;
2282  h->slice_num = h->slice_table[mb_xy];
2283  mb_type = h->cur_pic.mb_type[mb_xy];
2284  h->list_count = h->list_counts[mb_xy];
2285 
2286  if (FRAME_MBAFF(h))
2287  h->mb_mbaff =
2288  h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2289 
2290  h->mb_x = mb_x;
2291  h->mb_y = mb_y;
2292  dest_y = h->cur_pic.f.data[0] +
2293  ((mb_x << pixel_shift) + mb_y * h->linesize) * 16;
2294  dest_cb = h->cur_pic.f.data[1] +
2295  (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2296  mb_y * h->uvlinesize * block_h;
2297  dest_cr = h->cur_pic.f.data[2] +
2298  (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2299  mb_y * h->uvlinesize * block_h;
2300  // FIXME simplify above
2301 
2302  if (MB_FIELD(h)) {
2303  linesize = h->mb_linesize = h->linesize * 2;
2304  uvlinesize = h->mb_uvlinesize = h->uvlinesize * 2;
2305  if (mb_y & 1) { // FIXME move out of this function?
2306  dest_y -= h->linesize * 15;
2307  dest_cb -= h->uvlinesize * (block_h - 1);
2308  dest_cr -= h->uvlinesize * (block_h - 1);
2309  }
2310  } else {
2311  linesize = h->mb_linesize = h->linesize;
2312  uvlinesize = h->mb_uvlinesize = h->uvlinesize;
2313  }
2314  backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize,
2315  uvlinesize, 0);
2316  if (fill_filter_caches(h, mb_type))
2317  continue;
2318  h->chroma_qp[0] = get_chroma_qp(h, 0, h->cur_pic.qscale_table[mb_xy]);
2319  h->chroma_qp[1] = get_chroma_qp(h, 1, h->cur_pic.qscale_table[mb_xy]);
2320 
2321  if (FRAME_MBAFF(h)) {
2322  ff_h264_filter_mb(h, mb_x, mb_y, dest_y, dest_cb, dest_cr,
2323  linesize, uvlinesize);
2324  } else {
2325  ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb,
2326  dest_cr, linesize, uvlinesize);
2327  }
2328  }
2329  }
2330  h->slice_type = old_slice_type;
2331  h->mb_x = end_x;
2332  h->mb_y = end_mb_y - FRAME_MBAFF(h);
2333  h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
2334  h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
2335 }
2336 
2337 static void predict_field_decoding_flag(H264Context *h)
2338 {
2339  const int mb_xy = h->mb_x + h->mb_y * h->mb_stride;
2340  int mb_type = (h->slice_table[mb_xy - 1] == h->slice_num) ?
2341  h->cur_pic.mb_type[mb_xy - 1] :
2342  (h->slice_table[mb_xy - h->mb_stride] == h->slice_num) ?
2343  h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2344  h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2345 }
2346 
2347 /**
2348  * Draw edges and report progress for the last MB row.
2349  */
2350 static void decode_finish_row(H264Context *h)
2351 {
2352  int top = 16 * (h->mb_y >> FIELD_PICTURE(h));
2353  int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
2354  int height = 16 << FRAME_MBAFF(h);
2355  int deblock_border = (16 + 4) << FRAME_MBAFF(h);
2356 
2357  if (h->deblocking_filter) {
2358  if ((top + height) >= pic_height)
2359  height += deblock_border;
2360  top -= deblock_border;
2361  }
2362 
2363  if (top >= pic_height || (top + height) < 0)
2364  return;
2365 
2366  height = FFMIN(height, pic_height - top);
2367  if (top < 0) {
2368  height = top + height;
2369  top = 0;
2370  }
2371 
2372  ff_h264_draw_horiz_band(h, top, height);
2373 
2374  if (h->droppable || h->er.error_occurred)
2375  return;
2376 
2377  ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
2378  h->picture_structure == PICT_BOTTOM_FIELD);
2379 }
2380 
2381 static void er_add_slice(H264Context *h, int startx, int starty,
2382  int endx, int endy, int status)
2383 {
2384  if (CONFIG_ERROR_RESILIENCE) {
2385  ERContext *er = &h->er;
2386 
2387  ff_er_add_slice(er, startx, starty, endx, endy, status);
2388  }
2389 }
2390 
2391 static int decode_slice(struct AVCodecContext *avctx, void *arg)
2392 {
2393  H264Context *h = *(void **)arg;
2394  int lf_x_start = h->mb_x;
2395 
2396  h->mb_skip_run = -1;
2397 
2398  av_assert0(h->block_offset[15] == (4 * ((scan8[15] - scan8[0]) & 7) << h->pixel_shift) + 4 * h->linesize * ((scan8[15] - scan8[0]) >> 3));
2399 
2400  h->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2401  avctx->codec_id != AV_CODEC_ID_H264 ||
2402  (CONFIG_GRAY && (h->flags & CODEC_FLAG_GRAY));
2403 
2404  if (!(h->avctx->active_thread_type & FF_THREAD_SLICE) && h->picture_structure == PICT_FRAME && h->er.error_status_table) {
2405  const int start_i = av_clip(h->resync_mb_x + h->resync_mb_y * h->mb_width, 0, h->mb_num - 1);
2406  if (start_i) {
2407  int prev_status = h->er.error_status_table[h->er.mb_index2xy[start_i - 1]];
2408  prev_status &= ~ VP_START;
2409  if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
2410  h->er.error_occurred = 1;
2411  }
2412  }
2413 
2414  if (h->pps.cabac) {
2415  /* realign */
2416  align_get_bits(&h->gb);
2417 
2418  /* init cabac */
2419  ff_init_cabac_decoder(&h->cabac,
2420  h->gb.buffer + get_bits_count(&h->gb) / 8,
2421  (get_bits_left(&h->gb) + 7) / 8);
2422 
2423  ff_h264_init_cabac_states(h);
2424 
2425  for (;;) {
2426  // START_TIMER
2427  int ret = ff_h264_decode_mb_cabac(h);
2428  int eos;
2429  // STOP_TIMER("decode_mb_cabac")
2430 
2431  if (ret >= 0)
2432  ff_h264_hl_decode_mb(h);
2433 
2434  // FIXME optimal? or let mb_decode decode 16x32 ?
2435  if (ret >= 0 && FRAME_MBAFF(h)) {
2436  h->mb_y++;
2437 
2438  ret = ff_h264_decode_mb_cabac(h);
2439 
2440  if (ret >= 0)
2441  ff_h264_hl_decode_mb(h);
2442  h->mb_y--;
2443  }
2444  eos = get_cabac_terminate(&h->cabac);
2445 
2446  if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2447  h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2448  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
2449  h->mb_y, ER_MB_END);
2450  if (h->mb_x >= lf_x_start)
2451  loop_filter(h, lf_x_start, h->mb_x + 1);
2452  return 0;
2453  }
2454  if (h->cabac.bytestream > h->cabac.bytestream_end + 2 )
2455  av_log(h->avctx, AV_LOG_DEBUG, "bytestream overread %"PTRDIFF_SPECIFIER"\n", h->cabac.bytestream_end - h->cabac.bytestream);
2456  if (ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 4) {
2457  av_log(h->avctx, AV_LOG_ERROR,
2458  "error while decoding MB %d %d, bytestream %"PTRDIFF_SPECIFIER"\n",
2459  h->mb_x, h->mb_y,
2460  h->cabac.bytestream_end - h->cabac.bytestream);
2461  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2462  h->mb_y, ER_MB_ERROR);
2463  return AVERROR_INVALIDDATA;
2464  }
2465 
2466  if (++h->mb_x >= h->mb_width) {
2467  loop_filter(h, lf_x_start, h->mb_x);
2468  h->mb_x = lf_x_start = 0;
2469  decode_finish_row(h);
2470  ++h->mb_y;
2471  if (FIELD_OR_MBAFF_PICTURE(h)) {
2472  ++h->mb_y;
2473  if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
2474  predict_field_decoding_flag(h);
2475  }
2476  }
2477 
2478  if (eos || h->mb_y >= h->mb_height) {
2479  tprintf(h->avctx, "slice end %d %d\n",
2480  get_bits_count(&h->gb), h->gb.size_in_bits);
2481  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
2482  h->mb_y, ER_MB_END);
2483  if (h->mb_x > lf_x_start)
2484  loop_filter(h, lf_x_start, h->mb_x);
2485  return 0;
2486  }
2487  }
2488  } else {
2489  for (;;) {
2490  int ret = ff_h264_decode_mb_cavlc(h);
2491 
2492  if (ret >= 0)
2493  ff_h264_hl_decode_mb(h);
2494 
2495  // FIXME optimal? or let mb_decode decode 16x32 ?
2496  if (ret >= 0 && FRAME_MBAFF(h)) {
2497  h->mb_y++;
2498  ret = ff_h264_decode_mb_cavlc(h);
2499 
2500  if (ret >= 0)
2501  ff_h264_hl_decode_mb(h);
2502  h->mb_y--;
2503  }
2504 
2505  if (ret < 0) {
2506  av_log(h->avctx, AV_LOG_ERROR,
2507  "error while decoding MB %d %d\n", h->mb_x, h->mb_y);
2508  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2509  h->mb_y, ER_MB_ERROR);
2510  return ret;
2511  }
2512 
2513  if (++h->mb_x >= h->mb_width) {
2514  loop_filter(h, lf_x_start, h->mb_x);
2515  h->mb_x = lf_x_start = 0;
2516  decode_finish_row(h);
2517  ++h->mb_y;
2518  if (FIELD_OR_MBAFF_PICTURE(h)) {
2519  ++h->mb_y;
2520  if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
2521  predict_field_decoding_flag(h);
2522  }
2523  if (h->mb_y >= h->mb_height) {
2524  tprintf(h->avctx, "slice end %d %d\n",
2525  get_bits_count(&h->gb), h->gb.size_in_bits);
2526 
2527  if ( get_bits_left(&h->gb) == 0
2528  || get_bits_left(&h->gb) > 0 && !(h->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
2529  er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2530  h->mb_x - 1, h->mb_y, ER_MB_END);
2531 
2532  return 0;
2533  } else {
2534  er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2535  h->mb_x, h->mb_y, ER_MB_END);
2536 
2537  return AVERROR_INVALIDDATA;
2538  }
2539  }
2540  }
2541 
2542  if (get_bits_left(&h->gb) <= 0 && h->mb_skip_run <= 0) {
2543  tprintf(h->avctx, "slice end %d %d\n",
2544  get_bits_count(&h->gb), h->gb.size_in_bits);
2545 
2546  if (get_bits_left(&h->gb) == 0) {
2547  er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2548  h->mb_x - 1, h->mb_y, ER_MB_END);
2549  if (h->mb_x > lf_x_start)
2550  loop_filter(h, lf_x_start, h->mb_x);
2551 
2552  return 0;
2553  } else {
2554  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2555  h->mb_y, ER_MB_ERROR);
2556 
2557  return AVERROR_INVALIDDATA;
2558  }
2559  }
2560  }
2561  }
2562 }
2563 
2564 /**
2565  * Call decode_slice() for each context.
2566  *
2567  * @param h h264 master context
2568  * @param context_count number of contexts to execute
2569  */
2570 int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
2571 {
2572  AVCodecContext *const avctx = h->avctx;
2573  H264Context *hx;
2574  int i;
2575 
2576  av_assert0(h->mb_y < h->mb_height);
2577 
2578  if (h->avctx->hwaccel ||
2579  h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
2580  return 0;
2581  if (context_count == 1) {
2582  return decode_slice(avctx, &h);
2583  } else {
2584  av_assert0(context_count > 0);
2585  for (i = 1; i < context_count; i++) {
2586  hx = h->thread_context[i];
2587  if (CONFIG_ERROR_RESILIENCE) {
2588  hx->er.error_count = 0;
2589  }
2590  hx->x264_build = h->x264_build;
2591  }
2592 
2593  avctx->execute(avctx, decode_slice, h->thread_context,
2594  NULL, context_count, sizeof(void *));
2595 
2596  /* pull back stuff from slices to master context */
2597  hx = h->thread_context[context_count - 1];
2598  h->mb_x = hx->mb_x;
2599  h->mb_y = hx->mb_y;
2600  h->droppable = hx->droppable;
2601  h->picture_structure = hx->picture_structure;
2602  if (CONFIG_ERROR_RESILIENCE) {
2603  for (i = 1; i < context_count; i++)
2604  h->er.error_count += h->thread_context[i]->er.error_count;
2605  }
2606  }
2607 
2608  return 0;
2609 }
Generated on Sun Mar 8 2015 02:34:52 for FFmpeg by   doxygen 1.8.2