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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 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_420[] = {
151 #if CONFIG_H264_DXVA2_HWACCEL
152  AV_PIX_FMT_DXVA2_VLD,
153 #endif
154 #if CONFIG_H264_VAAPI_HWACCEL
155  AV_PIX_FMT_VAAPI_VLD,
156 #endif
157 #if CONFIG_H264_VDA_HWACCEL
158  AV_PIX_FMT_VDA_VLD,
159  AV_PIX_FMT_VDA,
160 #endif
161 #if CONFIG_H264_VDPAU_HWACCEL
162  AV_PIX_FMT_VDPAU,
163 #endif
164  AV_PIX_FMT_YUV420P,
165  AV_PIX_FMT_NONE
166 };
167 
168 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_jpeg_420[] = {
169 #if CONFIG_H264_DXVA2_HWACCEL
170  AV_PIX_FMT_DXVA2_VLD,
171 #endif
172 #if CONFIG_H264_VAAPI_HWACCEL
173  AV_PIX_FMT_VAAPI_VLD,
174 #endif
175 #if CONFIG_H264_VDA_HWACCEL
176  AV_PIX_FMT_VDA_VLD,
177  AV_PIX_FMT_VDA,
178 #endif
179 #if CONFIG_H264_VDPAU_HWACCEL
180  AV_PIX_FMT_VDPAU,
181 #endif
182  AV_PIX_FMT_YUVJ420P,
183  AV_PIX_FMT_NONE
184 };
185 
186 
187 static void release_unused_pictures(H264Context *h, int remove_current)
188 {
189  int i;
190 
191  /* release non reference frames */
192  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
193  if (h->DPB[i].f.buf[0] && !h->DPB[i].reference &&
194  (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
195  ff_h264_unref_picture(h, &h->DPB[i]);
196  }
197  }
198 }
199 
200 static int alloc_scratch_buffers(H264Context *h, int linesize)
201 {
202  int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
203 
204  if (h->bipred_scratchpad)
205  return 0;
206 
207  h->bipred_scratchpad = av_malloc(16 * 6 * alloc_size);
208  // edge emu needs blocksize + filter length - 1
209  // (= 21x21 for h264)
210  h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 21);
211 
212  if (!h->bipred_scratchpad || !h->edge_emu_buffer) {
213  av_freep(&h->bipred_scratchpad);
214  av_freep(&h->edge_emu_buffer);
215  return AVERROR(ENOMEM);
216  }
217 
218  return 0;
219 }
220 
221 static int init_table_pools(H264Context *h)
222 {
223  const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
224  const int mb_array_size = h->mb_stride * h->mb_height;
225  const int b4_stride = h->mb_width * 4 + 1;
226  const int b4_array_size = b4_stride * h->mb_height * 4;
227 
228  h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
229  av_buffer_allocz);
230  h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
231  sizeof(uint32_t), av_buffer_allocz);
232  h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
233  sizeof(int16_t), av_buffer_allocz);
234  h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
235 
236  if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
237  !h->ref_index_pool) {
238  av_buffer_pool_uninit(&h->qscale_table_pool);
239  av_buffer_pool_uninit(&h->mb_type_pool);
240  av_buffer_pool_uninit(&h->motion_val_pool);
241  av_buffer_pool_uninit(&h->ref_index_pool);
242  return AVERROR(ENOMEM);
243  }
244 
245  return 0;
246 }
247 
248 static int alloc_picture(H264Context *h, H264Picture *pic)
249 {
250  int i, ret = 0;
251 
252  av_assert0(!pic->f.data[0]);
253 
254  pic->tf.f = &pic->f;
255  ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
256  AV_GET_BUFFER_FLAG_REF : 0);
257  if (ret < 0)
258  goto fail;
259 
260  h->linesize = pic->f.linesize[0];
261  h->uvlinesize = pic->f.linesize[1];
262  pic->crop = h->sps.crop;
263  pic->crop_top = h->sps.crop_top;
264  pic->crop_left= h->sps.crop_left;
265 
266  if (h->avctx->hwaccel) {
267  const AVHWAccel *hwaccel = h->avctx->hwaccel;
268  av_assert0(!pic->hwaccel_picture_private);
269  if (hwaccel->frame_priv_data_size) {
270  pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
271  if (!pic->hwaccel_priv_buf)
272  return AVERROR(ENOMEM);
273  pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
274  }
275  }
276  if (!h->avctx->hwaccel && CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY && pic->f.data[2]) {
277  int h_chroma_shift, v_chroma_shift;
278  av_pix_fmt_get_chroma_sub_sample(pic->f.format,
279  &h_chroma_shift, &v_chroma_shift);
280 
281  for(i=0; i<FF_CEIL_RSHIFT(h->avctx->height, v_chroma_shift); i++) {
282  memset(pic->f.data[1] + pic->f.linesize[1]*i,
283  0x80, FF_CEIL_RSHIFT(h->avctx->width, h_chroma_shift));
284  memset(pic->f.data[2] + pic->f.linesize[2]*i,
285  0x80, FF_CEIL_RSHIFT(h->avctx->width, h_chroma_shift));
286  }
287  }
288 
289  if (!h->qscale_table_pool) {
290  ret = init_table_pools(h);
291  if (ret < 0)
292  goto fail;
293  }
294 
295  pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
296  pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
297  if (!pic->qscale_table_buf || !pic->mb_type_buf)
298  goto fail;
299 
300  pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
301  pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
302 
303  for (i = 0; i < 2; i++) {
304  pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
305  pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
306  if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
307  goto fail;
308 
309  pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
310  pic->ref_index[i] = pic->ref_index_buf[i]->data;
311  }
312 
313  return 0;
314 fail:
315  ff_h264_unref_picture(h, pic);
316  return (ret < 0) ? ret : AVERROR(ENOMEM);
317 }
318 
319 static inline int pic_is_unused(H264Context *h, H264Picture *pic)
320 {
321  if (!pic->f.buf[0])
322  return 1;
323  if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
324  return 1;
325  return 0;
326 }
327 
328 static int find_unused_picture(H264Context *h)
329 {
330  int i;
331 
332  for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
333  if (pic_is_unused(h, &h->DPB[i]))
334  break;
335  }
336  if (i == H264_MAX_PICTURE_COUNT)
337  return AVERROR_INVALIDDATA;
338 
339  if (h->DPB[i].needs_realloc) {
340  h->DPB[i].needs_realloc = 0;
341  ff_h264_unref_picture(h, &h->DPB[i]);
342  }
343 
344  return i;
345 }
346 
347 
348 static void init_dequant8_coeff_table(H264Context *h)
349 {
350  int i, j, q, x;
351  const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
352 
353  for (i = 0; i < 6; i++) {
354  h->dequant8_coeff[i] = h->dequant8_buffer[i];
355  for (j = 0; j < i; j++)
356  if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
357  64 * sizeof(uint8_t))) {
358  h->dequant8_coeff[i] = h->dequant8_buffer[j];
359  break;
360  }
361  if (j < i)
362  continue;
363 
364  for (q = 0; q < max_qp + 1; q++) {
365  int shift = div6[q];
366  int idx = rem6[q];
367  for (x = 0; x < 64; x++)
368  h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
369  ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
370  h->pps.scaling_matrix8[i][x]) << shift;
371  }
372  }
373 }
374 
375 static void init_dequant4_coeff_table(H264Context *h)
376 {
377  int i, j, q, x;
378  const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
379  for (i = 0; i < 6; i++) {
380  h->dequant4_coeff[i] = h->dequant4_buffer[i];
381  for (j = 0; j < i; j++)
382  if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
383  16 * sizeof(uint8_t))) {
384  h->dequant4_coeff[i] = h->dequant4_buffer[j];
385  break;
386  }
387  if (j < i)
388  continue;
389 
390  for (q = 0; q < max_qp + 1; q++) {
391  int shift = div6[q] + 2;
392  int idx = rem6[q];
393  for (x = 0; x < 16; x++)
394  h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
395  ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
396  h->pps.scaling_matrix4[i][x]) << shift;
397  }
398  }
399 }
400 
401 void h264_init_dequant_tables(H264Context *h)
402 {
403  int i, x;
404  init_dequant4_coeff_table(h);
405  memset(h->dequant8_coeff, 0, sizeof(h->dequant8_coeff));
406 
407  if (h->pps.transform_8x8_mode)
408  init_dequant8_coeff_table(h);
409  if (h->sps.transform_bypass) {
410  for (i = 0; i < 6; i++)
411  for (x = 0; x < 16; x++)
412  h->dequant4_coeff[i][0][x] = 1 << 6;
413  if (h->pps.transform_8x8_mode)
414  for (i = 0; i < 6; i++)
415  for (x = 0; x < 64; x++)
416  h->dequant8_coeff[i][0][x] = 1 << 6;
417  }
418 }
419 
420 /**
421  * Mimic alloc_tables(), but for every context thread.
422  */
423 static void clone_tables(H264Context *dst, H264Context *src, int i)
424 {
425  dst->intra4x4_pred_mode = src->intra4x4_pred_mode + i * 8 * 2 * src->mb_stride;
426  dst->non_zero_count = src->non_zero_count;
427  dst->slice_table = src->slice_table;
428  dst->cbp_table = src->cbp_table;
429  dst->mb2b_xy = src->mb2b_xy;
430  dst->mb2br_xy = src->mb2br_xy;
431  dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
432  dst->mvd_table[0] = src->mvd_table[0] + i * 8 * 2 * src->mb_stride;
433  dst->mvd_table[1] = src->mvd_table[1] + i * 8 * 2 * src->mb_stride;
434  dst->direct_table = src->direct_table;
435  dst->list_counts = src->list_counts;
436  dst->DPB = src->DPB;
437  dst->cur_pic_ptr = src->cur_pic_ptr;
438  dst->cur_pic = src->cur_pic;
439  dst->bipred_scratchpad = NULL;
440  dst->edge_emu_buffer = NULL;
441  ff_h264_pred_init(&dst->hpc, src->avctx->codec_id, src->sps.bit_depth_luma,
442  src->sps.chroma_format_idc);
443 }
444 
445 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
446 #undef REBASE_PICTURE
447 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
448  (((pic) && (pic) >= (old_ctx)->DPB && \
449  (pic) < (old_ctx)->DPB + H264_MAX_PICTURE_COUNT) ? \
450  &(new_ctx)->DPB[(pic) - (old_ctx)->DPB] : NULL)
451 
452 static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
453  H264Context *new_base,
454  H264Context *old_base)
455 {
456  int i;
457 
458  for (i = 0; i < count; i++) {
459  assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
460  IN_RANGE(from[i], old_base->DPB,
461  sizeof(H264Picture) * H264_MAX_PICTURE_COUNT) ||
462  !from[i]));
463  to[i] = REBASE_PICTURE(from[i], new_base, old_base);
464  }
465 }
466 
467 static int copy_parameter_set(void **to, void **from, int count, int size)
468 {
469  int i;
470 
471  for (i = 0; i < count; i++) {
472  if (to[i] && !from[i]) {
473  av_freep(&to[i]);
474  } else if (from[i] && !to[i]) {
475  to[i] = av_malloc(size);
476  if (!to[i])
477  return AVERROR(ENOMEM);
478  }
479 
480  if (from[i])
481  memcpy(to[i], from[i], size);
482  }
483 
484  return 0;
485 }
486 
487 #define copy_fields(to, from, start_field, end_field) \
488  memcpy(&(to)->start_field, &(from)->start_field, \
489  (char *)&(to)->end_field - (char *)&(to)->start_field)
490 
491 static int h264_slice_header_init(H264Context *h, int reinit);
492 
493 int ff_h264_update_thread_context(AVCodecContext *dst,
494  const AVCodecContext *src)
495 {
496  H264Context *h = dst->priv_data, *h1 = src->priv_data;
497  int inited = h->context_initialized, err = 0;
498  int context_reinitialized = 0;
499  int i, ret;
500 
501  if (dst == src)
502  return 0;
503 
504  if (inited &&
505  (h->width != h1->width ||
506  h->height != h1->height ||
507  h->mb_width != h1->mb_width ||
508  h->mb_height != h1->mb_height ||
509  h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
510  h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
511  h->sps.colorspace != h1->sps.colorspace)) {
512 
513  /* set bits_per_raw_sample to the previous value. the check for changed
514  * bit depth in h264_set_parameter_from_sps() uses it and sets it to
515  * the current value */
516  h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
517 
518  av_freep(&h->bipred_scratchpad);
519 
520  h->width = h1->width;
521  h->height = h1->height;
522  h->mb_height = h1->mb_height;
523  h->mb_width = h1->mb_width;
524  h->mb_num = h1->mb_num;
525  h->mb_stride = h1->mb_stride;
526  h->b_stride = h1->b_stride;
527  // SPS/PPS
528  if ((ret = copy_parameter_set((void **)h->sps_buffers,
529  (void **)h1->sps_buffers,
530  MAX_SPS_COUNT, sizeof(SPS))) < 0)
531  return ret;
532  h->sps = h1->sps;
533  if ((ret = copy_parameter_set((void **)h->pps_buffers,
534  (void **)h1->pps_buffers,
535  MAX_PPS_COUNT, sizeof(PPS))) < 0)
536  return ret;
537  h->pps = h1->pps;
538 
539  if ((err = h264_slice_header_init(h, 1)) < 0) {
540  av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed\n");
541  return err;
542  }
543  context_reinitialized = 1;
544 
545 #if 0
546  h264_set_parameter_from_sps(h);
547  //Note we set context_reinitialized which will cause h264_set_parameter_from_sps to be reexecuted
548  h->cur_chroma_format_idc = h1->cur_chroma_format_idc;
549 #endif
550  }
551  /* update linesize on resize for h264. The h264 decoder doesn't
552  * necessarily call ff_mpv_frame_start in the new thread */
553  h->linesize = h1->linesize;
554  h->uvlinesize = h1->uvlinesize;
555 
556  /* copy block_offset since frame_start may not be called */
557  memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
558 
559  if (!inited) {
560  for (i = 0; i < MAX_SPS_COUNT; i++)
561  av_freep(h->sps_buffers + i);
562 
563  for (i = 0; i < MAX_PPS_COUNT; i++)
564  av_freep(h->pps_buffers + i);
565 
566  av_freep(&h->rbsp_buffer[0]);
567  av_freep(&h->rbsp_buffer[1]);
568  memcpy(h, h1, offsetof(H264Context, intra_pcm_ptr));
569  memcpy(&h->cabac, &h1->cabac,
570  sizeof(H264Context) - offsetof(H264Context, cabac));
571  av_assert0((void*)&h->cabac == &h->mb_padding + 1);
572 
573  memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
574  memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
575 
576  memset(&h->er, 0, sizeof(h->er));
577  memset(&h->mb, 0, sizeof(h->mb));
578  memset(&h->mb_luma_dc, 0, sizeof(h->mb_luma_dc));
579  memset(&h->mb_padding, 0, sizeof(h->mb_padding));
580  memset(&h->cur_pic, 0, sizeof(h->cur_pic));
581 
582  h->avctx = dst;
583  h->DPB = NULL;
584  h->qscale_table_pool = NULL;
585  h->mb_type_pool = NULL;
586  h->ref_index_pool = NULL;
587  h->motion_val_pool = NULL;
588  h->intra4x4_pred_mode= NULL;
589  h->non_zero_count = NULL;
590  h->slice_table_base = NULL;
591  h->slice_table = NULL;
592  h->cbp_table = NULL;
593  h->chroma_pred_mode_table = NULL;
594  memset(h->mvd_table, 0, sizeof(h->mvd_table));
595  h->direct_table = NULL;
596  h->list_counts = NULL;
597  h->mb2b_xy = NULL;
598  h->mb2br_xy = NULL;
599  for (i = 0; i < 2; i++) {
600  h->rbsp_buffer[i] = NULL;
601  h->rbsp_buffer_size[i] = 0;
602  }
603 
604  if (h1->context_initialized) {
605  h->context_initialized = 0;
606 
607  memset(&h->cur_pic, 0, sizeof(h->cur_pic));
608  av_frame_unref(&h->cur_pic.f);
609  h->cur_pic.tf.f = &h->cur_pic.f;
610 
611  ret = ff_h264_alloc_tables(h);
612  if (ret < 0) {
613  av_log(dst, AV_LOG_ERROR, "Could not allocate memory\n");
614  return ret;
615  }
616  ret = ff_h264_context_init(h);
617  if (ret < 0) {
618  av_log(dst, AV_LOG_ERROR, "context_init() failed.\n");
619  return ret;
620  }
621  }
622 
623  h->bipred_scratchpad = NULL;
624  h->edge_emu_buffer = NULL;
625 
626  h->thread_context[0] = h;
627  h->context_initialized = h1->context_initialized;
628  }
629 
630  h->avctx->coded_height = h1->avctx->coded_height;
631  h->avctx->coded_width = h1->avctx->coded_width;
632  h->avctx->width = h1->avctx->width;
633  h->avctx->height = h1->avctx->height;
634  h->coded_picture_number = h1->coded_picture_number;
635  h->first_field = h1->first_field;
636  h->picture_structure = h1->picture_structure;
637  h->qscale = h1->qscale;
638  h->droppable = h1->droppable;
639  h->low_delay = h1->low_delay;
640 
641  for (i = 0; h->DPB && i < H264_MAX_PICTURE_COUNT; i++) {
642  ff_h264_unref_picture(h, &h->DPB[i]);
643  if (h1->DPB && h1->DPB[i].f.buf[0] &&
644  (ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
645  return ret;
646  }
647 
648  h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
649  ff_h264_unref_picture(h, &h->cur_pic);
650  if (h1->cur_pic.f.buf[0] && (ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic)) < 0)
651  return ret;
652 
653  h->workaround_bugs = h1->workaround_bugs;
654  h->low_delay = h1->low_delay;
655  h->droppable = h1->droppable;
656 
657  // extradata/NAL handling
658  h->is_avc = h1->is_avc;
659 
660  // SPS/PPS
661  if ((ret = copy_parameter_set((void **)h->sps_buffers,
662  (void **)h1->sps_buffers,
663  MAX_SPS_COUNT, sizeof(SPS))) < 0)
664  return ret;
665  h->sps = h1->sps;
666  if ((ret = copy_parameter_set((void **)h->pps_buffers,
667  (void **)h1->pps_buffers,
668  MAX_PPS_COUNT, sizeof(PPS))) < 0)
669  return ret;
670  h->pps = h1->pps;
671 
672  // Dequantization matrices
673  // FIXME these are big - can they be only copied when PPS changes?
674  copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
675 
676  for (i = 0; i < 6; i++)
677  h->dequant4_coeff[i] = h->dequant4_buffer[0] +
678  (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
679 
680  for (i = 0; i < 6; i++)
681  h->dequant8_coeff[i] = h->dequant8_buffer[0] +
682  (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
683 
684  h->dequant_coeff_pps = h1->dequant_coeff_pps;
685 
686  // POC timing
687  copy_fields(h, h1, poc_lsb, redundant_pic_count);
688 
689  // reference lists
690  copy_fields(h, h1, short_ref, cabac_init_idc);
691 
692  copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
693  copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
694  copy_picture_range(h->delayed_pic, h1->delayed_pic,
695  MAX_DELAYED_PIC_COUNT + 2, h, h1);
696 
697  h->frame_recovered = h1->frame_recovered;
698 
699  if (context_reinitialized)
700  ff_h264_set_parameter_from_sps(h);
701 
702  if (!h->cur_pic_ptr)
703  return 0;
704 
705  if (!h->droppable) {
706  err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
707  h->prev_poc_msb = h->poc_msb;
708  h->prev_poc_lsb = h->poc_lsb;
709  }
710  h->prev_frame_num_offset = h->frame_num_offset;
711  h->prev_frame_num = h->frame_num;
712  h->outputed_poc = h->next_outputed_poc;
713 
714  h->recovery_frame = h1->recovery_frame;
715 
716  return err;
717 }
718 
719 static int h264_frame_start(H264Context *h)
720 {
721  H264Picture *pic;
722  int i, ret;
723  const int pixel_shift = h->pixel_shift;
724  int c[4] = {
725  1<<(h->sps.bit_depth_luma-1),
726  1<<(h->sps.bit_depth_chroma-1),
727  1<<(h->sps.bit_depth_chroma-1),
728  -1
729  };
730 
731  if (!ff_thread_can_start_frame(h->avctx)) {
732  av_log(h->avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
733  return -1;
734  }
735 
736  release_unused_pictures(h, 1);
737  h->cur_pic_ptr = NULL;
738 
739  i = find_unused_picture(h);
740  if (i < 0) {
741  av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
742  return i;
743  }
744  pic = &h->DPB[i];
745 
746  pic->reference = h->droppable ? 0 : h->picture_structure;
747  pic->f.coded_picture_number = h->coded_picture_number++;
748  pic->field_picture = h->picture_structure != PICT_FRAME;
749 
750  /*
751  * Zero key_frame here; IDR markings per slice in frame or fields are ORed
752  * in later.
753  * See decode_nal_units().
754  */
755  pic->f.key_frame = 0;
756  pic->mmco_reset = 0;
757  pic->recovered = 0;
758  pic->invalid_gap = 0;
759  pic->sei_recovery_frame_cnt = h->sei_recovery_frame_cnt;
760 
761  if ((ret = alloc_picture(h, pic)) < 0)
762  return ret;
763  if(!h->frame_recovered && !h->avctx->hwaccel &&
764  !(h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU))
765  avpriv_color_frame(&pic->f, c);
766 
767  h->cur_pic_ptr = pic;
768  ff_h264_unref_picture(h, &h->cur_pic);
769  if (CONFIG_ERROR_RESILIENCE) {
770  ff_h264_set_erpic(&h->er.cur_pic, NULL);
771  }
772 
773  if ((ret = ff_h264_ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
774  return ret;
775 
776  if (CONFIG_ERROR_RESILIENCE) {
777  ff_er_frame_start(&h->er);
778  ff_h264_set_erpic(&h->er.last_pic, NULL);
779  ff_h264_set_erpic(&h->er.next_pic, NULL);
780  }
781 
782  assert(h->linesize && h->uvlinesize);
783 
784  for (i = 0; i < 16; i++) {
785  h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
786  h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
787  }
788  for (i = 0; i < 16; i++) {
789  h->block_offset[16 + i] =
790  h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
791  h->block_offset[48 + 16 + i] =
792  h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
793  }
794 
795  /* We mark the current picture as non-reference after allocating it, so
796  * that if we break out due to an error it can be released automatically
797  * in the next ff_mpv_frame_start().
798  */
799  h->cur_pic_ptr->reference = 0;
800 
801  h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
802 
803  h->next_output_pic = NULL;
804 
805  assert(h->cur_pic_ptr->long_ref == 0);
806 
807  return 0;
808 }
809 
810 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
811  uint8_t *src_cb, uint8_t *src_cr,
812  int linesize, int uvlinesize,
813  int simple)
814 {
815  uint8_t *top_border;
816  int top_idx = 1;
817  const int pixel_shift = h->pixel_shift;
818  int chroma444 = CHROMA444(h);
819  int chroma422 = CHROMA422(h);
820 
821  src_y -= linesize;
822  src_cb -= uvlinesize;
823  src_cr -= uvlinesize;
824 
825  if (!simple && FRAME_MBAFF(h)) {
826  if (h->mb_y & 1) {
827  if (!MB_MBAFF(h)) {
828  top_border = h->top_borders[0][h->mb_x];
829  AV_COPY128(top_border, src_y + 15 * linesize);
830  if (pixel_shift)
831  AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
832  if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
833  if (chroma444) {
834  if (pixel_shift) {
835  AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
836  AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
837  AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
838  AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
839  } else {
840  AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
841  AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
842  }
843  } else if (chroma422) {
844  if (pixel_shift) {
845  AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
846  AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
847  } else {
848  AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
849  AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
850  }
851  } else {
852  if (pixel_shift) {
853  AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
854  AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
855  } else {
856  AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
857  AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
858  }
859  }
860  }
861  }
862  } else if (MB_MBAFF(h)) {
863  top_idx = 0;
864  } else
865  return;
866  }
867 
868  top_border = h->top_borders[top_idx][h->mb_x];
869  /* There are two lines saved, the line above the top macroblock
870  * of a pair, and the line above the bottom macroblock. */
871  AV_COPY128(top_border, src_y + 16 * linesize);
872  if (pixel_shift)
873  AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
874 
875  if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
876  if (chroma444) {
877  if (pixel_shift) {
878  AV_COPY128(top_border + 32, src_cb + 16 * linesize);
879  AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
880  AV_COPY128(top_border + 64, src_cr + 16 * linesize);
881  AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
882  } else {
883  AV_COPY128(top_border + 16, src_cb + 16 * linesize);
884  AV_COPY128(top_border + 32, src_cr + 16 * linesize);
885  }
886  } else if (chroma422) {
887  if (pixel_shift) {
888  AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
889  AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
890  } else {
891  AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
892  AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
893  }
894  } else {
895  if (pixel_shift) {
896  AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
897  AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
898  } else {
899  AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
900  AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
901  }
902  }
903  }
904 }
905 
906 /**
907  * Initialize implicit_weight table.
908  * @param field 0/1 initialize the weight for interlaced MBAFF
909  * -1 initializes the rest
910  */
911 static void implicit_weight_table(H264Context *h, int field)
912 {
913  int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
914 
915  for (i = 0; i < 2; i++) {
916  h->luma_weight_flag[i] = 0;
917  h->chroma_weight_flag[i] = 0;
918  }
919 
920  if (field < 0) {
921  if (h->picture_structure == PICT_FRAME) {
922  cur_poc = h->cur_pic_ptr->poc;
923  } else {
924  cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
925  }
926  if (h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
927  h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2 * cur_poc) {
928  h->use_weight = 0;
929  h->use_weight_chroma = 0;
930  return;
931  }
932  ref_start = 0;
933  ref_count0 = h->ref_count[0];
934  ref_count1 = h->ref_count[1];
935  } else {
936  cur_poc = h->cur_pic_ptr->field_poc[field];
937  ref_start = 16;
938  ref_count0 = 16 + 2 * h->ref_count[0];
939  ref_count1 = 16 + 2 * h->ref_count[1];
940  }
941 
942  h->use_weight = 2;
943  h->use_weight_chroma = 2;
944  h->luma_log2_weight_denom = 5;
945  h->chroma_log2_weight_denom = 5;
946 
947  for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
948  int poc0 = h->ref_list[0][ref0].poc;
949  for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
950  int w = 32;
951  if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
952  int poc1 = h->ref_list[1][ref1].poc;
953  int td = av_clip(poc1 - poc0, -128, 127);
954  if (td) {
955  int tb = av_clip(cur_poc - poc0, -128, 127);
956  int tx = (16384 + (FFABS(td) >> 1)) / td;
957  int dist_scale_factor = (tb * tx + 32) >> 8;
958  if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
959  w = 64 - dist_scale_factor;
960  }
961  }
962  if (field < 0) {
963  h->implicit_weight[ref0][ref1][0] =
964  h->implicit_weight[ref0][ref1][1] = w;
965  } else {
966  h->implicit_weight[ref0][ref1][field] = w;
967  }
968  }
969  }
970 }
971 
972 /**
973  * initialize scan tables
974  */
975 static void init_scan_tables(H264Context *h)
976 {
977  int i;
978  for (i = 0; i < 16; i++) {
979 #define TRANSPOSE(x) ((x) >> 2) | (((x) << 2) & 0xF)
980  h->zigzag_scan[i] = TRANSPOSE(zigzag_scan[i]);
981  h->field_scan[i] = TRANSPOSE(field_scan[i]);
982 #undef TRANSPOSE
983  }
984  for (i = 0; i < 64; i++) {
985 #define TRANSPOSE(x) ((x) >> 3) | (((x) & 7) << 3)
986  h->zigzag_scan8x8[i] = TRANSPOSE(ff_zigzag_direct[i]);
987  h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
988  h->field_scan8x8[i] = TRANSPOSE(field_scan8x8[i]);
989  h->field_scan8x8_cavlc[i] = TRANSPOSE(field_scan8x8_cavlc[i]);
990 #undef TRANSPOSE
991  }
992  if (h->sps.transform_bypass) { // FIXME same ugly
993  memcpy(h->zigzag_scan_q0 , zigzag_scan , sizeof(h->zigzag_scan_q0 ));
994  memcpy(h->zigzag_scan8x8_q0 , ff_zigzag_direct , sizeof(h->zigzag_scan8x8_q0 ));
995  memcpy(h->zigzag_scan8x8_cavlc_q0 , zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
996  memcpy(h->field_scan_q0 , field_scan , sizeof(h->field_scan_q0 ));
997  memcpy(h->field_scan8x8_q0 , field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
998  memcpy(h->field_scan8x8_cavlc_q0 , field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
999  } else {
1000  memcpy(h->zigzag_scan_q0 , h->zigzag_scan , sizeof(h->zigzag_scan_q0 ));
1001  memcpy(h->zigzag_scan8x8_q0 , h->zigzag_scan8x8 , sizeof(h->zigzag_scan8x8_q0 ));
1002  memcpy(h->zigzag_scan8x8_cavlc_q0 , h->zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
1003  memcpy(h->field_scan_q0 , h->field_scan , sizeof(h->field_scan_q0 ));
1004  memcpy(h->field_scan8x8_q0 , h->field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
1005  memcpy(h->field_scan8x8_cavlc_q0 , h->field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
1006  }
1007 }
1008 
1009 /**
1010  * Replicate H264 "master" context to thread contexts.
1011  */
1012 static int clone_slice(H264Context *dst, H264Context *src)
1013 {
1014  memcpy(dst->block_offset, src->block_offset, sizeof(dst->block_offset));
1015  dst->cur_pic_ptr = src->cur_pic_ptr;
1016  dst->cur_pic = src->cur_pic;
1017  dst->linesize = src->linesize;
1018  dst->uvlinesize = src->uvlinesize;
1019  dst->first_field = src->first_field;
1020 
1021  dst->prev_poc_msb = src->prev_poc_msb;
1022  dst->prev_poc_lsb = src->prev_poc_lsb;
1023  dst->prev_frame_num_offset = src->prev_frame_num_offset;
1024  dst->prev_frame_num = src->prev_frame_num;
1025  dst->short_ref_count = src->short_ref_count;
1026 
1027  memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
1028  memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
1029  memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1030 
1031  memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
1032  memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));
1033 
1034  return 0;
1035 }
1036 
1037 static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
1038 {
1039  enum AVPixelFormat pix_fmts[2];
1040  const enum AVPixelFormat *choices = pix_fmts;
1041  int i;
1042 
1043  pix_fmts[1] = AV_PIX_FMT_NONE;
1044 
1045  switch (h->sps.bit_depth_luma) {
1046  case 9:
1047  if (CHROMA444(h)) {
1048  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1049  pix_fmts[0] = AV_PIX_FMT_GBRP9;
1050  } else
1051  pix_fmts[0] = AV_PIX_FMT_YUV444P9;
1052  } else if (CHROMA422(h))
1053  pix_fmts[0] = AV_PIX_FMT_YUV422P9;
1054  else
1055  pix_fmts[0] = AV_PIX_FMT_YUV420P9;
1056  break;
1057  case 10:
1058  if (CHROMA444(h)) {
1059  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1060  pix_fmts[0] = AV_PIX_FMT_GBRP10;
1061  } else
1062  pix_fmts[0] = AV_PIX_FMT_YUV444P10;
1063  } else if (CHROMA422(h))
1064  pix_fmts[0] = AV_PIX_FMT_YUV422P10;
1065  else
1066  pix_fmts[0] = AV_PIX_FMT_YUV420P10;
1067  break;
1068  case 12:
1069  if (CHROMA444(h)) {
1070  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1071  pix_fmts[0] = AV_PIX_FMT_GBRP12;
1072  } else
1073  pix_fmts[0] = AV_PIX_FMT_YUV444P12;
1074  } else if (CHROMA422(h))
1075  pix_fmts[0] = AV_PIX_FMT_YUV422P12;
1076  else
1077  pix_fmts[0] = AV_PIX_FMT_YUV420P12;
1078  break;
1079  case 14:
1080  if (CHROMA444(h)) {
1081  if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1082  pix_fmts[0] = AV_PIX_FMT_GBRP14;
1083  } else
1084  pix_fmts[0] = AV_PIX_FMT_YUV444P14;
1085  } else if (CHROMA422(h))
1086  pix_fmts[0] = AV_PIX_FMT_YUV422P14;
1087  else
1088  pix_fmts[0] = AV_PIX_FMT_YUV420P14;
1089  break;
1090  case 8:
1091  if (CHROMA444(h)) {
1092  if (h->avctx->colorspace == AVCOL_SPC_YCGCO)
1093  av_log(h->avctx, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
1094  if (h->avctx->colorspace == AVCOL_SPC_RGB)
1095  pix_fmts[0] = AV_PIX_FMT_GBRP;
1096  else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
1097  pix_fmts[0] = AV_PIX_FMT_YUVJ444P;
1098  else
1099  pix_fmts[0] = AV_PIX_FMT_YUV444P;
1100  } else if (CHROMA422(h)) {
1101  if (h->avctx->color_range == AVCOL_RANGE_JPEG)
1102  pix_fmts[0] = AV_PIX_FMT_YUVJ422P;
1103  else
1104  pix_fmts[0] = AV_PIX_FMT_YUV422P;
1105  } else {
1106  if (h->avctx->codec->pix_fmts)
1107  choices = h->avctx->codec->pix_fmts;
1108  else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
1109  choices = h264_hwaccel_pixfmt_list_jpeg_420;
1110  else
1111  choices = h264_hwaccel_pixfmt_list_420;
1112  }
1113  break;
1114  default:
1115  av_log(h->avctx, AV_LOG_ERROR,
1116  "Unsupported bit depth %d\n", h->sps.bit_depth_luma);
1117  return AVERROR_INVALIDDATA;
1118  }
1119 
1120  for (i=0; choices[i] != AV_PIX_FMT_NONE; i++)
1121  if (choices[i] == h->avctx->pix_fmt && !force_callback)
1122  return choices[i];
1123  return ff_thread_get_format(h->avctx, choices);
1124 }
1125 
1126 /* export coded and cropped frame dimensions to AVCodecContext */
1127 static int init_dimensions(H264Context *h)
1128 {
1129  int width = h->width - (h->sps.crop_right + h->sps.crop_left);
1130  int height = h->height - (h->sps.crop_top + h->sps.crop_bottom);
1131  int crop_present = h->sps.crop_left || h->sps.crop_top ||
1132  h->sps.crop_right || h->sps.crop_bottom;
1133  av_assert0(h->sps.crop_right + h->sps.crop_left < (unsigned)h->width);
1134  av_assert0(h->sps.crop_top + h->sps.crop_bottom < (unsigned)h->height);
1135 
1136  /* handle container cropping */
1137  if (!crop_present &&
1138  FFALIGN(h->avctx->width, 16) == h->width &&
1139  FFALIGN(h->avctx->height, 16) == h->height) {
1140  width = h->avctx->width;
1141  height = h->avctx->height;
1142  }
1143 
1144  if (width <= 0 || height <= 0) {
1145  av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
1146  width, height);
1147  if (h->avctx->err_recognition & AV_EF_EXPLODE)
1148  return AVERROR_INVALIDDATA;
1149 
1150  av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
1151  h->sps.crop_bottom =
1152  h->sps.crop_top =
1153  h->sps.crop_right =
1154  h->sps.crop_left =
1155  h->sps.crop = 0;
1156 
1157  width = h->width;
1158  height = h->height;
1159  }
1160 
1161  h->avctx->coded_width = h->width;
1162  h->avctx->coded_height = h->height;
1163  h->avctx->width = width;
1164  h->avctx->height = height;
1165 
1166  return 0;
1167 }
1168 
1169 static int h264_slice_header_init(H264Context *h, int reinit)
1170 {
1171  int nb_slices = (HAVE_THREADS &&
1172  h->avctx->active_thread_type & FF_THREAD_SLICE) ?
1173  h->avctx->thread_count : 1;
1174  int i, ret;
1175 
1176  ff_set_sar(h->avctx, h->sps.sar);
1177  av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
1178  &h->chroma_x_shift, &h->chroma_y_shift);
1179 
1180  if (h->sps.timing_info_present_flag) {
1181  int64_t den = h->sps.time_scale;
1182  if (h->x264_build < 44U)
1183  den *= 2;
1184  av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
1185  h->sps.num_units_in_tick * h->avctx->ticks_per_frame, den, 1 << 30);
1186  }
1187 
1188  if (reinit)
1189  ff_h264_free_tables(h, 0);
1190  h->first_field = 0;
1191  h->prev_interlaced_frame = 1;
1192 
1193  init_scan_tables(h);
1194  ret = ff_h264_alloc_tables(h);
1195  if (ret < 0) {
1196  av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
1197  goto fail;
1198  }
1199 
1200  if (nb_slices > H264_MAX_THREADS || (nb_slices > h->mb_height && h->mb_height)) {
1201  int max_slices;
1202  if (h->mb_height)
1203  max_slices = FFMIN(H264_MAX_THREADS, h->mb_height);
1204  else
1205  max_slices = H264_MAX_THREADS;
1206  av_log(h->avctx, AV_LOG_WARNING, "too many threads/slices %d,"
1207  " reducing to %d\n", nb_slices, max_slices);
1208  nb_slices = max_slices;
1209  }
1210  h->slice_context_count = nb_slices;
1211 
1212  if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
1213  ret = ff_h264_context_init(h);
1214  if (ret < 0) {
1215  av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1216  goto fail;
1217  }
1218  } else {
1219  for (i = 1; i < h->slice_context_count; i++) {
1220  H264Context *c;
1221  c = h->thread_context[i] = av_mallocz(sizeof(H264Context));
1222  if (!c) {
1223  ret = AVERROR(ENOMEM);
1224  goto fail;
1225  }
1226  c->avctx = h->avctx;
1227  if (CONFIG_ERROR_RESILIENCE) {
1228  c->mecc = h->mecc;
1229  }
1230  c->vdsp = h->vdsp;
1231  c->h264dsp = h->h264dsp;
1232  c->h264qpel = h->h264qpel;
1233  c->h264chroma = h->h264chroma;
1234  c->sps = h->sps;
1235  c->pps = h->pps;
1236  c->pixel_shift = h->pixel_shift;
1237  c->cur_chroma_format_idc = h->cur_chroma_format_idc;
1238  c->width = h->width;
1239  c->height = h->height;
1240  c->linesize = h->linesize;
1241  c->uvlinesize = h->uvlinesize;
1242  c->chroma_x_shift = h->chroma_x_shift;
1243  c->chroma_y_shift = h->chroma_y_shift;
1244  c->qscale = h->qscale;
1245  c->droppable = h->droppable;
1246  c->data_partitioning = h->data_partitioning;
1247  c->low_delay = h->low_delay;
1248  c->mb_width = h->mb_width;
1249  c->mb_height = h->mb_height;
1250  c->mb_stride = h->mb_stride;
1251  c->mb_num = h->mb_num;
1252  c->flags = h->flags;
1253  c->workaround_bugs = h->workaround_bugs;
1254  c->pict_type = h->pict_type;
1255 
1256  init_scan_tables(c);
1257  clone_tables(c, h, i);
1258  c->context_initialized = 1;
1259  }
1260 
1261  for (i = 0; i < h->slice_context_count; i++)
1262  if ((ret = ff_h264_context_init(h->thread_context[i])) < 0) {
1263  av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1264  goto fail;
1265  }
1266  }
1267 
1268  h->context_initialized = 1;
1269 
1270  return 0;
1271 fail:
1272  ff_h264_free_tables(h, 0);
1273  h->context_initialized = 0;
1274  return ret;
1275 }
1276 
1277 static enum AVPixelFormat non_j_pixfmt(enum AVPixelFormat a)
1278 {
1279  switch (a) {
1280  case AV_PIX_FMT_YUVJ420P: return AV_PIX_FMT_YUV420P;
1281  case AV_PIX_FMT_YUVJ422P: return AV_PIX_FMT_YUV422P;
1282  case AV_PIX_FMT_YUVJ444P: return AV_PIX_FMT_YUV444P;
1283  default:
1284  return a;
1285  }
1286 }
1287 
1288 /**
1289  * Decode a slice header.
1290  * This will (re)intialize the decoder and call h264_frame_start() as needed.
1291  *
1292  * @param h h264context
1293  * @param h0 h264 master context (differs from 'h' when doing sliced based
1294  * parallel decoding)
1295  *
1296  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1297  */
1298 int ff_h264_decode_slice_header(H264Context *h, H264Context *h0)
1299 {
1300  unsigned int first_mb_in_slice;
1301  unsigned int pps_id;
1302  int ret;
1303  unsigned int slice_type, tmp, i, j;
1304  int last_pic_structure, last_pic_droppable;
1305  int must_reinit;
1306  int needs_reinit = 0;
1307  int field_pic_flag, bottom_field_flag;
1308 
1309  h->qpel_put = h->h264qpel.put_h264_qpel_pixels_tab;
1310  h->qpel_avg = h->h264qpel.avg_h264_qpel_pixels_tab;
1311 
1312  first_mb_in_slice = get_ue_golomb_long(&h->gb);
1313 
1314  if (first_mb_in_slice == 0) { // FIXME better field boundary detection
1315  if (h0->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
1316  ff_h264_field_end(h, 1);
1317  }
1318 
1319  h0->current_slice = 0;
1320  if (!h0->first_field) {
1321  if (h->cur_pic_ptr && !h->droppable) {
1322  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1323  h->picture_structure == PICT_BOTTOM_FIELD);
1324  }
1325  h->cur_pic_ptr = NULL;
1326  }
1327  }
1328 
1329  slice_type = get_ue_golomb_31(&h->gb);
1330  if (slice_type > 9) {
1331  av_log(h->avctx, AV_LOG_ERROR,
1332  "slice type %d too large at %d %d\n",
1333  slice_type, h->mb_x, h->mb_y);
1334  return AVERROR_INVALIDDATA;
1335  }
1336  if (slice_type > 4) {
1337  slice_type -= 5;
1338  h->slice_type_fixed = 1;
1339  } else
1340  h->slice_type_fixed = 0;
1341 
1342  slice_type = golomb_to_pict_type[slice_type];
1343  h->slice_type = slice_type;
1344  h->slice_type_nos = slice_type & 3;
1345 
1346  if (h->nal_unit_type == NAL_IDR_SLICE &&
1347  h->slice_type_nos != AV_PICTURE_TYPE_I) {
1348  av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1349  return AVERROR_INVALIDDATA;
1350  }
1351 
1352  if (
1353  (h->avctx->skip_frame >= AVDISCARD_NONREF && !h->nal_ref_idc) ||
1354  (h->avctx->skip_frame >= AVDISCARD_BIDIR && h->slice_type_nos == AV_PICTURE_TYPE_B) ||
1355  (h->avctx->skip_frame >= AVDISCARD_NONINTRA && h->slice_type_nos != AV_PICTURE_TYPE_I) ||
1356  (h->avctx->skip_frame >= AVDISCARD_NONKEY && h->nal_unit_type != NAL_IDR_SLICE) ||
1357  h->avctx->skip_frame >= AVDISCARD_ALL) {
1358  return SLICE_SKIPED;
1359  }
1360 
1361  // to make a few old functions happy, it's wrong though
1362  h->pict_type = h->slice_type;
1363 
1364  pps_id = get_ue_golomb(&h->gb);
1365  if (pps_id >= MAX_PPS_COUNT) {
1366  av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
1367  return AVERROR_INVALIDDATA;
1368  }
1369  if (!h0->pps_buffers[pps_id]) {
1370  av_log(h->avctx, AV_LOG_ERROR,
1371  "non-existing PPS %u referenced\n",
1372  pps_id);
1373  return AVERROR_INVALIDDATA;
1374  }
1375  if (h0->au_pps_id >= 0 && pps_id != h0->au_pps_id) {
1376  av_log(h->avctx, AV_LOG_ERROR,
1377  "PPS change from %d to %d forbidden\n",
1378  h0->au_pps_id, pps_id);
1379  return AVERROR_INVALIDDATA;
1380  }
1381  h->pps = *h0->pps_buffers[pps_id];
1382 
1383  if (!h0->sps_buffers[h->pps.sps_id]) {
1384  av_log(h->avctx, AV_LOG_ERROR,
1385  "non-existing SPS %u referenced\n",
1386  h->pps.sps_id);
1387  return AVERROR_INVALIDDATA;
1388  }
1389 
1390  if (h->pps.sps_id != h->sps.sps_id ||
1391  h->pps.sps_id != h->current_sps_id ||
1392  h0->sps_buffers[h->pps.sps_id]->new) {
1393 
1394  h->sps = *h0->sps_buffers[h->pps.sps_id];
1395 
1396  if (h->mb_width != h->sps.mb_width ||
1397  h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) ||
1398  h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
1399  h->cur_chroma_format_idc != h->sps.chroma_format_idc
1400  )
1401  needs_reinit = 1;
1402 
1403  if (h->bit_depth_luma != h->sps.bit_depth_luma ||
1404  h->chroma_format_idc != h->sps.chroma_format_idc) {
1405  h->bit_depth_luma = h->sps.bit_depth_luma;
1406  h->chroma_format_idc = h->sps.chroma_format_idc;
1407  needs_reinit = 1;
1408  }
1409  if ((ret = ff_h264_set_parameter_from_sps(h)) < 0)
1410  return ret;
1411  }
1412 
1413  h->avctx->profile = ff_h264_get_profile(&h->sps);
1414  h->avctx->level = h->sps.level_idc;
1415  h->avctx->refs = h->sps.ref_frame_count;
1416 
1417  must_reinit = (h->context_initialized &&
1418  ( 16*h->sps.mb_width != h->avctx->coded_width
1419  || 16*h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) != h->avctx->coded_height
1420  || h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
1421  || h->cur_chroma_format_idc != h->sps.chroma_format_idc
1422  || av_cmp_q(h->sps.sar, h->avctx->sample_aspect_ratio)
1423  || h->mb_width != h->sps.mb_width
1424  || h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag)
1425  ));
1426  if (non_j_pixfmt(h0->avctx->pix_fmt) != non_j_pixfmt(get_pixel_format(h0, 0)))
1427  must_reinit = 1;
1428 
1429  h->mb_width = h->sps.mb_width;
1430  h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1431  h->mb_num = h->mb_width * h->mb_height;
1432  h->mb_stride = h->mb_width + 1;
1433 
1434  h->b_stride = h->mb_width * 4;
1435 
1436  h->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
1437 
1438  h->width = 16 * h->mb_width;
1439  h->height = 16 * h->mb_height;
1440 
1441  ret = init_dimensions(h);
1442  if (ret < 0)
1443  return ret;
1444 
1445  if (h->sps.video_signal_type_present_flag) {
1446  h->avctx->color_range = h->sps.full_range>0 ? AVCOL_RANGE_JPEG
1447  : AVCOL_RANGE_MPEG;
1448  if (h->sps.colour_description_present_flag) {
1449  if (h->avctx->colorspace != h->sps.colorspace)
1450  needs_reinit = 1;
1451  h->avctx->color_primaries = h->sps.color_primaries;
1452  h->avctx->color_trc = h->sps.color_trc;
1453  h->avctx->colorspace = h->sps.colorspace;
1454  }
1455  }
1456 
1457  if (h->context_initialized &&
1458  (must_reinit || needs_reinit)) {
1459  if (h != h0) {
1460  av_log(h->avctx, AV_LOG_ERROR,
1461  "changing width %d -> %d / height %d -> %d on "
1462  "slice %d\n",
1463  h->width, h->avctx->coded_width,
1464  h->height, h->avctx->coded_height,
1465  h0->current_slice + 1);
1466  return AVERROR_INVALIDDATA;
1467  }
1468 
1469  ff_h264_flush_change(h);
1470 
1471  if ((ret = get_pixel_format(h, 1)) < 0)
1472  return ret;
1473  h->avctx->pix_fmt = ret;
1474 
1475  av_log(h->avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
1476  "pix_fmt: %s\n", h->width, h->height, av_get_pix_fmt_name(h->avctx->pix_fmt));
1477 
1478  if ((ret = h264_slice_header_init(h, 1)) < 0) {
1479  av_log(h->avctx, AV_LOG_ERROR,
1480  "h264_slice_header_init() failed\n");
1481  return ret;
1482  }
1483  }
1484  if (!h->context_initialized) {
1485  if (h != h0) {
1486  av_log(h->avctx, AV_LOG_ERROR,
1487  "Cannot (re-)initialize context during parallel decoding.\n");
1488  return AVERROR_PATCHWELCOME;
1489  }
1490 
1491  if ((ret = get_pixel_format(h, 1)) < 0)
1492  return ret;
1493  h->avctx->pix_fmt = ret;
1494 
1495  if ((ret = h264_slice_header_init(h, 0)) < 0) {
1496  av_log(h->avctx, AV_LOG_ERROR,
1497  "h264_slice_header_init() failed\n");
1498  return ret;
1499  }
1500  }
1501 
1502  if (h == h0 && h->dequant_coeff_pps != pps_id) {
1503  h->dequant_coeff_pps = pps_id;
1504  h264_init_dequant_tables(h);
1505  }
1506 
1507  h->frame_num = get_bits(&h->gb, h->sps.log2_max_frame_num);
1508 
1509  h->mb_mbaff = 0;
1510  h->mb_aff_frame = 0;
1511  last_pic_structure = h0->picture_structure;
1512  last_pic_droppable = h0->droppable;
1513  h->droppable = h->nal_ref_idc == 0;
1514  if (h->sps.frame_mbs_only_flag) {
1515  h->picture_structure = PICT_FRAME;
1516  } else {
1517  if (!h->sps.direct_8x8_inference_flag && slice_type == AV_PICTURE_TYPE_B) {
1518  av_log(h->avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
1519  return -1;
1520  }
1521  field_pic_flag = get_bits1(&h->gb);
1522  if (field_pic_flag) {
1523  bottom_field_flag = get_bits1(&h->gb);
1524  h->picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1525  } else {
1526  h->picture_structure = PICT_FRAME;
1527  h->mb_aff_frame = h->sps.mb_aff;
1528  }
1529  }
1530  h->mb_field_decoding_flag = h->picture_structure != PICT_FRAME;
1531 
1532  if (h0->current_slice != 0) {
1533  if (last_pic_structure != h->picture_structure ||
1534  last_pic_droppable != h->droppable) {
1535  av_log(h->avctx, AV_LOG_ERROR,
1536  "Changing field mode (%d -> %d) between slices is not allowed\n",
1537  last_pic_structure, h->picture_structure);
1538  h->picture_structure = last_pic_structure;
1539  h->droppable = last_pic_droppable;
1540  return AVERROR_INVALIDDATA;
1541  } else if (!h0->cur_pic_ptr) {
1542  av_log(h->avctx, AV_LOG_ERROR,
1543  "unset cur_pic_ptr on slice %d\n",
1544  h0->current_slice + 1);
1545  return AVERROR_INVALIDDATA;
1546  }
1547  } else {
1548  /* Shorten frame num gaps so we don't have to allocate reference
1549  * frames just to throw them away */
1550  if (h->frame_num != h->prev_frame_num) {
1551  int unwrap_prev_frame_num = h->prev_frame_num;
1552  int max_frame_num = 1 << h->sps.log2_max_frame_num;
1553 
1554  if (unwrap_prev_frame_num > h->frame_num)
1555  unwrap_prev_frame_num -= max_frame_num;
1556 
1557  if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
1558  unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
1559  if (unwrap_prev_frame_num < 0)
1560  unwrap_prev_frame_num += max_frame_num;
1561 
1562  h->prev_frame_num = unwrap_prev_frame_num;
1563  }
1564  }
1565 
1566  /* See if we have a decoded first field looking for a pair...
1567  * Here, we're using that to see if we should mark previously
1568  * decode frames as "finished".
1569  * We have to do that before the "dummy" in-between frame allocation,
1570  * since that can modify h->cur_pic_ptr. */
1571  if (h0->first_field) {
1572  assert(h0->cur_pic_ptr);
1573  assert(h0->cur_pic_ptr->f.buf[0]);
1574  assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
1575 
1576  /* Mark old field/frame as completed */
1577  if (h0->cur_pic_ptr->tf.owner == h0->avctx) {
1578  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1579  last_pic_structure == PICT_BOTTOM_FIELD);
1580  }
1581 
1582  /* figure out if we have a complementary field pair */
1583  if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1584  /* Previous field is unmatched. Don't display it, but let it
1585  * remain for reference if marked as such. */
1586  if (last_pic_structure != PICT_FRAME) {
1587  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1588  last_pic_structure == PICT_TOP_FIELD);
1589  }
1590  } else {
1591  if (h0->cur_pic_ptr->frame_num != h->frame_num) {
1592  /* This and previous field were reference, but had
1593  * different frame_nums. Consider this field first in
1594  * pair. Throw away previous field except for reference
1595  * purposes. */
1596  if (last_pic_structure != PICT_FRAME) {
1597  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1598  last_pic_structure == PICT_TOP_FIELD);
1599  }
1600  } else {
1601  /* Second field in complementary pair */
1602  if (!((last_pic_structure == PICT_TOP_FIELD &&
1603  h->picture_structure == PICT_BOTTOM_FIELD) ||
1604  (last_pic_structure == PICT_BOTTOM_FIELD &&
1605  h->picture_structure == PICT_TOP_FIELD))) {
1606  av_log(h->avctx, AV_LOG_ERROR,
1607  "Invalid field mode combination %d/%d\n",
1608  last_pic_structure, h->picture_structure);
1609  h->picture_structure = last_pic_structure;
1610  h->droppable = last_pic_droppable;
1611  return AVERROR_INVALIDDATA;
1612  } else if (last_pic_droppable != h->droppable) {
1613  avpriv_request_sample(h->avctx,
1614  "Found reference and non-reference fields in the same frame, which");
1615  h->picture_structure = last_pic_structure;
1616  h->droppable = last_pic_droppable;
1617  return AVERROR_PATCHWELCOME;
1618  }
1619  }
1620  }
1621  }
1622 
1623  while (h->frame_num != h->prev_frame_num && !h0->first_field &&
1624  h->frame_num != (h->prev_frame_num + 1) % (1 << h->sps.log2_max_frame_num)) {
1625  H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1626  av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
1627  h->frame_num, h->prev_frame_num);
1628  if (!h->sps.gaps_in_frame_num_allowed_flag)
1629  for(i=0; i<FF_ARRAY_ELEMS(h->last_pocs); i++)
1630  h->last_pocs[i] = INT_MIN;
1631  ret = h264_frame_start(h);
1632  if (ret < 0) {
1633  h0->first_field = 0;
1634  return ret;
1635  }
1636 
1637  h->prev_frame_num++;
1638  h->prev_frame_num %= 1 << h->sps.log2_max_frame_num;
1639  h->cur_pic_ptr->frame_num = h->prev_frame_num;
1640  h->cur_pic_ptr->invalid_gap = !h->sps.gaps_in_frame_num_allowed_flag;
1641  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
1642  ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
1643  ret = ff_generate_sliding_window_mmcos(h, 1);
1644  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1645  return ret;
1646  ret = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1647  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1648  return ret;
1649  /* Error concealment: If a ref is missing, copy the previous ref
1650  * in its place.
1651  * FIXME: Avoiding a memcpy would be nice, but ref handling makes
1652  * many assumptions about there being no actual duplicates.
1653  * FIXME: This does not copy padding for out-of-frame motion
1654  * vectors. Given we are concealing a lost frame, this probably
1655  * is not noticeable by comparison, but it should be fixed. */
1656  if (h->short_ref_count) {
1657  if (prev) {
1658  av_image_copy(h->short_ref[0]->f.data,
1659  h->short_ref[0]->f.linesize,
1660  (const uint8_t **)prev->f.data,
1661  prev->f.linesize,
1662  h->avctx->pix_fmt,
1663  h->mb_width * 16,
1664  h->mb_height * 16);
1665  h->short_ref[0]->poc = prev->poc + 2;
1666  }
1667  h->short_ref[0]->frame_num = h->prev_frame_num;
1668  }
1669  }
1670 
1671  /* See if we have a decoded first field looking for a pair...
1672  * We're using that to see whether to continue decoding in that
1673  * frame, or to allocate a new one. */
1674  if (h0->first_field) {
1675  assert(h0->cur_pic_ptr);
1676  assert(h0->cur_pic_ptr->f.buf[0]);
1677  assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
1678 
1679  /* figure out if we have a complementary field pair */
1680  if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1681  /* Previous field is unmatched. Don't display it, but let it
1682  * remain for reference if marked as such. */
1683  h0->cur_pic_ptr = NULL;
1684  h0->first_field = FIELD_PICTURE(h);
1685  } else {
1686  if (h0->cur_pic_ptr->frame_num != h->frame_num) {
1687  ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1688  h0->picture_structure==PICT_BOTTOM_FIELD);
1689  /* This and the previous field had different frame_nums.
1690  * Consider this field first in pair. Throw away previous
1691  * one except for reference purposes. */
1692  h0->first_field = 1;
1693  h0->cur_pic_ptr = NULL;
1694  } else {
1695  /* Second field in complementary pair */
1696  h0->first_field = 0;
1697  }
1698  }
1699  } else {
1700  /* Frame or first field in a potentially complementary pair */
1701  h0->first_field = FIELD_PICTURE(h);
1702  }
1703 
1704  if (!FIELD_PICTURE(h) || h0->first_field) {
1705  if (h264_frame_start(h) < 0) {
1706  h0->first_field = 0;
1707  return AVERROR_INVALIDDATA;
1708  }
1709  } else {
1710  release_unused_pictures(h, 0);
1711  }
1712  /* Some macroblocks can be accessed before they're available in case
1713  * of lost slices, MBAFF or threading. */
1714  if (FIELD_PICTURE(h)) {
1715  for(i = (h->picture_structure == PICT_BOTTOM_FIELD); i<h->mb_height; i++)
1716  memset(h->slice_table + i*h->mb_stride, -1, (h->mb_stride - (i+1==h->mb_height)) * sizeof(*h->slice_table));
1717  } else {
1718  memset(h->slice_table, -1,
1719  (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
1720  }
1721  h0->last_slice_type = -1;
1722  }
1723  if (h != h0 && (ret = clone_slice(h, h0)) < 0)
1724  return ret;
1725 
1726  /* can't be in alloc_tables because linesize isn't known there.
1727  * FIXME: redo bipred weight to not require extra buffer? */
1728  for (i = 0; i < h->slice_context_count; i++)
1729  if (h->thread_context[i]) {
1730  ret = alloc_scratch_buffers(h->thread_context[i], h->linesize);
1731  if (ret < 0)
1732  return ret;
1733  }
1734 
1735  h->cur_pic_ptr->frame_num = h->frame_num; // FIXME frame_num cleanup
1736 
1737  av_assert1(h->mb_num == h->mb_width * h->mb_height);
1738  if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
1739  first_mb_in_slice >= h->mb_num) {
1740  av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1741  return AVERROR_INVALIDDATA;
1742  }
1743  h->resync_mb_x = h->mb_x = first_mb_in_slice % h->mb_width;
1744  h->resync_mb_y = h->mb_y = (first_mb_in_slice / h->mb_width) <<
1745  FIELD_OR_MBAFF_PICTURE(h);
1746  if (h->picture_structure == PICT_BOTTOM_FIELD)
1747  h->resync_mb_y = h->mb_y = h->mb_y + 1;
1748  av_assert1(h->mb_y < h->mb_height);
1749 
1750  if (h->picture_structure == PICT_FRAME) {
1751  h->curr_pic_num = h->frame_num;
1752  h->max_pic_num = 1 << h->sps.log2_max_frame_num;
1753  } else {
1754  h->curr_pic_num = 2 * h->frame_num + 1;
1755  h->max_pic_num = 1 << (h->sps.log2_max_frame_num + 1);
1756  }
1757 
1758  if (h->nal_unit_type == NAL_IDR_SLICE)
1759  get_ue_golomb(&h->gb); /* idr_pic_id */
1760 
1761  if (h->sps.poc_type == 0) {
1762  h->poc_lsb = get_bits(&h->gb, h->sps.log2_max_poc_lsb);
1763 
1764  if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1765  h->delta_poc_bottom = get_se_golomb(&h->gb);
1766  }
1767 
1768  if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
1769  h->delta_poc[0] = get_se_golomb(&h->gb);
1770 
1771  if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1772  h->delta_poc[1] = get_se_golomb(&h->gb);
1773  }
1774 
1775  ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
1776 
1777  if (h->pps.redundant_pic_cnt_present)
1778  h->redundant_pic_count = get_ue_golomb(&h->gb);
1779 
1780  ret = ff_set_ref_count(h);
1781  if (ret < 0)
1782  return ret;
1783 
1784  if (slice_type != AV_PICTURE_TYPE_I &&
1785  (h0->current_slice == 0 ||
1786  slice_type != h0->last_slice_type ||
1787  memcmp(h0->last_ref_count, h0->ref_count, sizeof(h0->ref_count)))) {
1788 
1789  ff_h264_fill_default_ref_list(h);
1790  }
1791 
1792  if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
1793  ret = ff_h264_decode_ref_pic_list_reordering(h);
1794  if (ret < 0) {
1795  h->ref_count[1] = h->ref_count[0] = 0;
1796  return ret;
1797  }
1798  }
1799 
1800  if ((h->pps.weighted_pred && h->slice_type_nos == AV_PICTURE_TYPE_P) ||
1801  (h->pps.weighted_bipred_idc == 1 &&
1802  h->slice_type_nos == AV_PICTURE_TYPE_B))
1803  ff_pred_weight_table(h);
1804  else if (h->pps.weighted_bipred_idc == 2 &&
1805  h->slice_type_nos == AV_PICTURE_TYPE_B) {
1806  implicit_weight_table(h, -1);
1807  } else {
1808  h->use_weight = 0;
1809  for (i = 0; i < 2; i++) {
1810  h->luma_weight_flag[i] = 0;
1811  h->chroma_weight_flag[i] = 0;
1812  }
1813  }
1814 
1815  // If frame-mt is enabled, only update mmco tables for the first slice
1816  // in a field. Subsequent slices can temporarily clobber h->mmco_index
1817  // or h->mmco, which will cause ref list mix-ups and decoding errors
1818  // further down the line. This may break decoding if the first slice is
1819  // corrupt, thus we only do this if frame-mt is enabled.
1820  if (h->nal_ref_idc) {
1821  ret = ff_h264_decode_ref_pic_marking(h0, &h->gb,
1822  !(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
1823  h0->current_slice == 0);
1824  if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1825  return AVERROR_INVALIDDATA;
1826  }
1827 
1828  if (FRAME_MBAFF(h)) {
1829  ff_h264_fill_mbaff_ref_list(h);
1830 
1831  if (h->pps.weighted_bipred_idc == 2 && h->slice_type_nos == AV_PICTURE_TYPE_B) {
1832  implicit_weight_table(h, 0);
1833  implicit_weight_table(h, 1);
1834  }
1835  }
1836 
1837  if (h->slice_type_nos == AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
1838  ff_h264_direct_dist_scale_factor(h);
1839  ff_h264_direct_ref_list_init(h);
1840 
1841  if (h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac) {
1842  tmp = get_ue_golomb_31(&h->gb);
1843  if (tmp > 2) {
1844  av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1845  return AVERROR_INVALIDDATA;
1846  }
1847  h->cabac_init_idc = tmp;
1848  }
1849 
1850  h->last_qscale_diff = 0;
1851  tmp = h->pps.init_qp + get_se_golomb(&h->gb);
1852  if (tmp > 51 + 6 * (h->sps.bit_depth_luma - 8)) {
1853  av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1854  return AVERROR_INVALIDDATA;
1855  }
1856  h->qscale = tmp;
1857  h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
1858  h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
1859  // FIXME qscale / qp ... stuff
1860  if (h->slice_type == AV_PICTURE_TYPE_SP)
1861  get_bits1(&h->gb); /* sp_for_switch_flag */
1862  if (h->slice_type == AV_PICTURE_TYPE_SP ||
1863  h->slice_type == AV_PICTURE_TYPE_SI)
1864  get_se_golomb(&h->gb); /* slice_qs_delta */
1865 
1866  h->deblocking_filter = 1;
1867  h->slice_alpha_c0_offset = 0;
1868  h->slice_beta_offset = 0;
1869  if (h->pps.deblocking_filter_parameters_present) {
1870  tmp = get_ue_golomb_31(&h->gb);
1871  if (tmp > 2) {
1872  av_log(h->avctx, AV_LOG_ERROR,
1873  "deblocking_filter_idc %u out of range\n", tmp);
1874  return AVERROR_INVALIDDATA;
1875  }
1876  h->deblocking_filter = tmp;
1877  if (h->deblocking_filter < 2)
1878  h->deblocking_filter ^= 1; // 1<->0
1879 
1880  if (h->deblocking_filter) {
1881  h->slice_alpha_c0_offset = get_se_golomb(&h->gb) * 2;
1882  h->slice_beta_offset = get_se_golomb(&h->gb) * 2;
1883  if (h->slice_alpha_c0_offset > 12 ||
1884  h->slice_alpha_c0_offset < -12 ||
1885  h->slice_beta_offset > 12 ||
1886  h->slice_beta_offset < -12) {
1887  av_log(h->avctx, AV_LOG_ERROR,
1888  "deblocking filter parameters %d %d out of range\n",
1889  h->slice_alpha_c0_offset, h->slice_beta_offset);
1890  return AVERROR_INVALIDDATA;
1891  }
1892  }
1893  }
1894 
1895  if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
1896  (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1897  h->nal_unit_type != NAL_IDR_SLICE) ||
1898  (h->avctx->skip_loop_filter >= AVDISCARD_NONINTRA &&
1899  h->slice_type_nos != AV_PICTURE_TYPE_I) ||
1900  (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
1901  h->slice_type_nos == AV_PICTURE_TYPE_B) ||
1902  (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1903  h->nal_ref_idc == 0))
1904  h->deblocking_filter = 0;
1905 
1906  if (h->deblocking_filter == 1 && h0->max_contexts > 1) {
1907  if (h->avctx->flags2 & CODEC_FLAG2_FAST) {
1908  /* Cheat slightly for speed:
1909  * Do not bother to deblock across slices. */
1910  h->deblocking_filter = 2;
1911  } else {
1912  h0->max_contexts = 1;
1913  if (!h0->single_decode_warning) {
1914  av_log(h->avctx, AV_LOG_INFO,
1915  "Cannot parallelize slice decoding with deblocking filter type 1, decoding such frames in sequential order\n"
1916  "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"
1917  "Setting the flags2 libavcodec option to +fast (-flags2 +fast) will disable deblocking across slices and enable parallel slice decoding "
1918  "but will generate non-standard-compliant output.\n");
1919  h0->single_decode_warning = 1;
1920  }
1921  if (h != h0) {
1922  av_log(h->avctx, AV_LOG_ERROR,
1923  "Deblocking switched inside frame.\n");
1924  return SLICE_SINGLETHREAD;
1925  }
1926  }
1927  }
1928  h->qp_thresh = 15 -
1929  FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) -
1930  FFMAX3(0,
1931  h->pps.chroma_qp_index_offset[0],
1932  h->pps.chroma_qp_index_offset[1]) +
1933  6 * (h->sps.bit_depth_luma - 8);
1934 
1935  h0->last_slice_type = slice_type;
1936  memcpy(h0->last_ref_count, h0->ref_count, sizeof(h0->last_ref_count));
1937  h->slice_num = ++h0->current_slice;
1938 
1939  if (h->slice_num)
1940  h0->slice_row[(h->slice_num-1)&(MAX_SLICES-1)]= h->resync_mb_y;
1941  if ( h0->slice_row[h->slice_num&(MAX_SLICES-1)] + 3 >= h->resync_mb_y
1942  && h0->slice_row[h->slice_num&(MAX_SLICES-1)] <= h->resync_mb_y
1943  && h->slice_num >= MAX_SLICES) {
1944  //in case of ASO this check needs to be updated depending on how we decide to assign slice numbers in this case
1945  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);
1946  }
1947 
1948  for (j = 0; j < 2; j++) {
1949  int id_list[16];
1950  int *ref2frm = h->ref2frm[h->slice_num & (MAX_SLICES - 1)][j];
1951  for (i = 0; i < 16; i++) {
1952  id_list[i] = 60;
1953  if (j < h->list_count && i < h->ref_count[j] &&
1954  h->ref_list[j][i].f.buf[0]) {
1955  int k;
1956  AVBuffer *buf = h->ref_list[j][i].f.buf[0]->buffer;
1957  for (k = 0; k < h->short_ref_count; k++)
1958  if (h->short_ref[k]->f.buf[0]->buffer == buf) {
1959  id_list[i] = k;
1960  break;
1961  }
1962  for (k = 0; k < h->long_ref_count; k++)
1963  if (h->long_ref[k] && h->long_ref[k]->f.buf[0]->buffer == buf) {
1964  id_list[i] = h->short_ref_count + k;
1965  break;
1966  }
1967  }
1968  }
1969 
1970  ref2frm[0] =
1971  ref2frm[1] = -1;
1972  for (i = 0; i < 16; i++)
1973  ref2frm[i + 2] = 4 * id_list[i] + (h->ref_list[j][i].reference & 3);
1974  ref2frm[18 + 0] =
1975  ref2frm[18 + 1] = -1;
1976  for (i = 16; i < 48; i++)
1977  ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1978  (h->ref_list[j][i].reference & 3);
1979  }
1980 
1981  if (h->ref_count[0]) ff_h264_set_erpic(&h->er.last_pic, &h->ref_list[0][0]);
1982  if (h->ref_count[1]) ff_h264_set_erpic(&h->er.next_pic, &h->ref_list[1][0]);
1983 
1984  h->er.ref_count = h->ref_count[0];
1985  h0->au_pps_id = pps_id;
1986  h->sps.new =
1987  h0->sps_buffers[h->pps.sps_id]->new = 0;
1988  h->current_sps_id = h->pps.sps_id;
1989 
1990  if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
1991  av_log(h->avctx, AV_LOG_DEBUG,
1992  "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",
1993  h->slice_num,
1994  (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
1995  first_mb_in_slice,
1996  av_get_picture_type_char(h->slice_type),
1997  h->slice_type_fixed ? " fix" : "",
1998  h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
1999  pps_id, h->frame_num,
2000  h->cur_pic_ptr->field_poc[0],
2001  h->cur_pic_ptr->field_poc[1],
2002  h->ref_count[0], h->ref_count[1],
2003  h->qscale,
2004  h->deblocking_filter,
2005  h->slice_alpha_c0_offset, h->slice_beta_offset,
2006  h->use_weight,
2007  h->use_weight == 1 && h->use_weight_chroma ? "c" : "",
2008  h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
2009  }
2010 
2011  return 0;
2012 }
2013 
2014 int ff_h264_get_slice_type(const H264Context *h)
2015 {
2016  switch (h->slice_type) {
2017  case AV_PICTURE_TYPE_P:
2018  return 0;
2019  case AV_PICTURE_TYPE_B:
2020  return 1;
2021  case AV_PICTURE_TYPE_I:
2022  return 2;
2023  case AV_PICTURE_TYPE_SP:
2024  return 3;
2025  case AV_PICTURE_TYPE_SI:
2026  return 4;
2027  default:
2028  return AVERROR_INVALIDDATA;
2029  }
2030 }
2031 
2032 static av_always_inline void fill_filter_caches_inter(H264Context *h,
2033  int mb_type, int top_xy,
2034  int left_xy[LEFT_MBS],
2035  int top_type,
2036  int left_type[LEFT_MBS],
2037  int mb_xy, int list)
2038 {
2039  int b_stride = h->b_stride;
2040  int16_t(*mv_dst)[2] = &h->mv_cache[list][scan8[0]];
2041  int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
2042  if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
2043  if (USES_LIST(top_type, list)) {
2044  const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
2045  const int b8_xy = 4 * top_xy + 2;
2046  int (*ref2frm)[64] = (void*)(h->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2047  AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
2048  ref_cache[0 - 1 * 8] =
2049  ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
2050  ref_cache[2 - 1 * 8] =
2051  ref_cache[3 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 1]];
2052  } else {
2053  AV_ZERO128(mv_dst - 1 * 8);
2054  AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2055  }
2056 
2057  if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
2058  if (USES_LIST(left_type[LTOP], list)) {
2059  const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
2060  const int b8_xy = 4 * left_xy[LTOP] + 1;
2061  int (*ref2frm)[64] =(void*)( h->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2062  AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
2063  AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
2064  AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
2065  AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
2066  ref_cache[-1 + 0] =
2067  ref_cache[-1 + 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
2068  ref_cache[-1 + 16] =
2069  ref_cache[-1 + 24] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
2070  } else {
2071  AV_ZERO32(mv_dst - 1 + 0);
2072  AV_ZERO32(mv_dst - 1 + 8);
2073  AV_ZERO32(mv_dst - 1 + 16);
2074  AV_ZERO32(mv_dst - 1 + 24);
2075  ref_cache[-1 + 0] =
2076  ref_cache[-1 + 8] =
2077  ref_cache[-1 + 16] =
2078  ref_cache[-1 + 24] = LIST_NOT_USED;
2079  }
2080  }
2081  }
2082 
2083  if (!USES_LIST(mb_type, list)) {
2084  fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
2085  AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2086  AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2087  AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2088  AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2089  return;
2090  }
2091 
2092  {
2093  int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
2094  int (*ref2frm)[64] = (void*)(h->ref2frm[h->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2095  uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
2096  uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
2097  AV_WN32A(&ref_cache[0 * 8], ref01);
2098  AV_WN32A(&ref_cache[1 * 8], ref01);
2099  AV_WN32A(&ref_cache[2 * 8], ref23);
2100  AV_WN32A(&ref_cache[3 * 8], ref23);
2101  }
2102 
2103  {
2104  int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * h->mb_x + 4 * h->mb_y * b_stride];
2105  AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
2106  AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
2107  AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
2108  AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
2109  }
2110 }
2111 
2112 /**
2113  *
2114  * @return non zero if the loop filter can be skipped
2115  */
2116 static int fill_filter_caches(H264Context *h, int mb_type)
2117 {
2118  const int mb_xy = h->mb_xy;
2119  int top_xy, left_xy[LEFT_MBS];
2120  int top_type, left_type[LEFT_MBS];
2121  uint8_t *nnz;
2122  uint8_t *nnz_cache;
2123 
2124  top_xy = mb_xy - (h->mb_stride << MB_FIELD(h));
2125 
2126  /* Wow, what a mess, why didn't they simplify the interlacing & intra
2127  * stuff, I can't imagine that these complex rules are worth it. */
2128 
2129  left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
2130  if (FRAME_MBAFF(h)) {
2131  const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
2132  const int curr_mb_field_flag = IS_INTERLACED(mb_type);
2133  if (h->mb_y & 1) {
2134  if (left_mb_field_flag != curr_mb_field_flag)
2135  left_xy[LTOP] -= h->mb_stride;
2136  } else {
2137  if (curr_mb_field_flag)
2138  top_xy += h->mb_stride &
2139  (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
2140  if (left_mb_field_flag != curr_mb_field_flag)
2141  left_xy[LBOT] += h->mb_stride;
2142  }
2143  }
2144 
2145  h->top_mb_xy = top_xy;
2146  h->left_mb_xy[LTOP] = left_xy[LTOP];
2147  h->left_mb_xy[LBOT] = left_xy[LBOT];
2148  {
2149  /* For sufficiently low qp, filtering wouldn't do anything.
2150  * This is a conservative estimate: could also check beta_offset
2151  * and more accurate chroma_qp. */
2152  int qp_thresh = h->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
2153  int qp = h->cur_pic.qscale_table[mb_xy];
2154  if (qp <= qp_thresh &&
2155  (left_xy[LTOP] < 0 ||
2156  ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
2157  (top_xy < 0 ||
2158  ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
2159  if (!FRAME_MBAFF(h))
2160  return 1;
2161  if ((left_xy[LTOP] < 0 ||
2162  ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
2163  (top_xy < h->mb_stride ||
2164  ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
2165  return 1;
2166  }
2167  }
2168 
2169  top_type = h->cur_pic.mb_type[top_xy];
2170  left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
2171  left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
2172  if (h->deblocking_filter == 2) {
2173  if (h->slice_table[top_xy] != h->slice_num)
2174  top_type = 0;
2175  if (h->slice_table[left_xy[LBOT]] != h->slice_num)
2176  left_type[LTOP] = left_type[LBOT] = 0;
2177  } else {
2178  if (h->slice_table[top_xy] == 0xFFFF)
2179  top_type = 0;
2180  if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
2181  left_type[LTOP] = left_type[LBOT] = 0;
2182  }
2183  h->top_type = top_type;
2184  h->left_type[LTOP] = left_type[LTOP];
2185  h->left_type[LBOT] = left_type[LBOT];
2186 
2187  if (IS_INTRA(mb_type))
2188  return 0;
2189 
2190  fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
2191  top_type, left_type, mb_xy, 0);
2192  if (h->list_count == 2)
2193  fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
2194  top_type, left_type, mb_xy, 1);
2195 
2196  nnz = h->non_zero_count[mb_xy];
2197  nnz_cache = h->non_zero_count_cache;
2198  AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
2199  AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
2200  AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
2201  AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
2202  h->cbp = h->cbp_table[mb_xy];
2203 
2204  if (top_type) {
2205  nnz = h->non_zero_count[top_xy];
2206  AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
2207  }
2208 
2209  if (left_type[LTOP]) {
2210  nnz = h->non_zero_count[left_xy[LTOP]];
2211  nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
2212  nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
2213  nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
2214  nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
2215  }
2216 
2217  /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
2218  * from what the loop filter needs */
2219  if (!CABAC(h) && h->pps.transform_8x8_mode) {
2220  if (IS_8x8DCT(top_type)) {
2221  nnz_cache[4 + 8 * 0] =
2222  nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
2223  nnz_cache[6 + 8 * 0] =
2224  nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
2225  }
2226  if (IS_8x8DCT(left_type[LTOP])) {
2227  nnz_cache[3 + 8 * 1] =
2228  nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
2229  }
2230  if (IS_8x8DCT(left_type[LBOT])) {
2231  nnz_cache[3 + 8 * 3] =
2232  nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
2233  }
2234 
2235  if (IS_8x8DCT(mb_type)) {
2236  nnz_cache[scan8[0]] =
2237  nnz_cache[scan8[1]] =
2238  nnz_cache[scan8[2]] =
2239  nnz_cache[scan8[3]] = (h->cbp & 0x1000) >> 12;
2240 
2241  nnz_cache[scan8[0 + 4]] =
2242  nnz_cache[scan8[1 + 4]] =
2243  nnz_cache[scan8[2 + 4]] =
2244  nnz_cache[scan8[3 + 4]] = (h->cbp & 0x2000) >> 12;
2245 
2246  nnz_cache[scan8[0 + 8]] =
2247  nnz_cache[scan8[1 + 8]] =
2248  nnz_cache[scan8[2 + 8]] =
2249  nnz_cache[scan8[3 + 8]] = (h->cbp & 0x4000) >> 12;
2250 
2251  nnz_cache[scan8[0 + 12]] =
2252  nnz_cache[scan8[1 + 12]] =
2253  nnz_cache[scan8[2 + 12]] =
2254  nnz_cache[scan8[3 + 12]] = (h->cbp & 0x8000) >> 12;
2255  }
2256  }
2257 
2258  return 0;
2259 }
2260 
2261 static void loop_filter(H264Context *h, int start_x, int end_x)
2262 {
2263  uint8_t *dest_y, *dest_cb, *dest_cr;
2264  int linesize, uvlinesize, mb_x, mb_y;
2265  const int end_mb_y = h->mb_y + FRAME_MBAFF(h);
2266  const int old_slice_type = h->slice_type;
2267  const int pixel_shift = h->pixel_shift;
2268  const int block_h = 16 >> h->chroma_y_shift;
2269 
2270  if (h->deblocking_filter) {
2271  for (mb_x = start_x; mb_x < end_x; mb_x++)
2272  for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
2273  int mb_xy, mb_type;
2274  mb_xy = h->mb_xy = mb_x + mb_y * h->mb_stride;
2275  h->slice_num = h->slice_table[mb_xy];
2276  mb_type = h->cur_pic.mb_type[mb_xy];
2277  h->list_count = h->list_counts[mb_xy];
2278 
2279  if (FRAME_MBAFF(h))
2280  h->mb_mbaff =
2281  h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2282 
2283  h->mb_x = mb_x;
2284  h->mb_y = mb_y;
2285  dest_y = h->cur_pic.f.data[0] +
2286  ((mb_x << pixel_shift) + mb_y * h->linesize) * 16;
2287  dest_cb = h->cur_pic.f.data[1] +
2288  (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2289  mb_y * h->uvlinesize * block_h;
2290  dest_cr = h->cur_pic.f.data[2] +
2291  (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2292  mb_y * h->uvlinesize * block_h;
2293  // FIXME simplify above
2294 
2295  if (MB_FIELD(h)) {
2296  linesize = h->mb_linesize = h->linesize * 2;
2297  uvlinesize = h->mb_uvlinesize = h->uvlinesize * 2;
2298  if (mb_y & 1) { // FIXME move out of this function?
2299  dest_y -= h->linesize * 15;
2300  dest_cb -= h->uvlinesize * (block_h - 1);
2301  dest_cr -= h->uvlinesize * (block_h - 1);
2302  }
2303  } else {
2304  linesize = h->mb_linesize = h->linesize;
2305  uvlinesize = h->mb_uvlinesize = h->uvlinesize;
2306  }
2307  backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize,
2308  uvlinesize, 0);
2309  if (fill_filter_caches(h, mb_type))
2310  continue;
2311  h->chroma_qp[0] = get_chroma_qp(h, 0, h->cur_pic.qscale_table[mb_xy]);
2312  h->chroma_qp[1] = get_chroma_qp(h, 1, h->cur_pic.qscale_table[mb_xy]);
2313 
2314  if (FRAME_MBAFF(h)) {
2315  ff_h264_filter_mb(h, mb_x, mb_y, dest_y, dest_cb, dest_cr,
2316  linesize, uvlinesize);
2317  } else {
2318  ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb,
2319  dest_cr, linesize, uvlinesize);
2320  }
2321  }
2322  }
2323  h->slice_type = old_slice_type;
2324  h->mb_x = end_x;
2325  h->mb_y = end_mb_y - FRAME_MBAFF(h);
2326  h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
2327  h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
2328 }
2329 
2330 static void predict_field_decoding_flag(H264Context *h)
2331 {
2332  const int mb_xy = h->mb_x + h->mb_y * h->mb_stride;
2333  int mb_type = (h->slice_table[mb_xy - 1] == h->slice_num) ?
2334  h->cur_pic.mb_type[mb_xy - 1] :
2335  (h->slice_table[mb_xy - h->mb_stride] == h->slice_num) ?
2336  h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2337  h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2338 }
2339 
2340 /**
2341  * Draw edges and report progress for the last MB row.
2342  */
2343 static void decode_finish_row(H264Context *h)
2344 {
2345  int top = 16 * (h->mb_y >> FIELD_PICTURE(h));
2346  int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
2347  int height = 16 << FRAME_MBAFF(h);
2348  int deblock_border = (16 + 4) << FRAME_MBAFF(h);
2349 
2350  if (h->deblocking_filter) {
2351  if ((top + height) >= pic_height)
2352  height += deblock_border;
2353  top -= deblock_border;
2354  }
2355 
2356  if (top >= pic_height || (top + height) < 0)
2357  return;
2358 
2359  height = FFMIN(height, pic_height - top);
2360  if (top < 0) {
2361  height = top + height;
2362  top = 0;
2363  }
2364 
2365  ff_h264_draw_horiz_band(h, top, height);
2366 
2367  if (h->droppable || h->er.error_occurred)
2368  return;
2369 
2370  ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
2371  h->picture_structure == PICT_BOTTOM_FIELD);
2372 }
2373 
2374 static void er_add_slice(H264Context *h, int startx, int starty,
2375  int endx, int endy, int status)
2376 {
2377  if (CONFIG_ERROR_RESILIENCE) {
2378  ERContext *er = &h->er;
2379 
2380  ff_er_add_slice(er, startx, starty, endx, endy, status);
2381  }
2382 }
2383 
2384 static int decode_slice(struct AVCodecContext *avctx, void *arg)
2385 {
2386  H264Context *h = *(void **)arg;
2387  int lf_x_start = h->mb_x;
2388 
2389  h->mb_skip_run = -1;
2390 
2391  av_assert0(h->block_offset[15] == (4 * ((scan8[15] - scan8[0]) & 7) << h->pixel_shift) + 4 * h->linesize * ((scan8[15] - scan8[0]) >> 3));
2392 
2393  h->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2394  avctx->codec_id != AV_CODEC_ID_H264 ||
2395  (CONFIG_GRAY && (h->flags & CODEC_FLAG_GRAY));
2396 
2397  if (!(h->avctx->active_thread_type & FF_THREAD_SLICE) && h->picture_structure == PICT_FRAME && h->er.error_status_table) {
2398  const int start_i = av_clip(h->resync_mb_x + h->resync_mb_y * h->mb_width, 0, h->mb_num - 1);
2399  if (start_i) {
2400  int prev_status = h->er.error_status_table[h->er.mb_index2xy[start_i - 1]];
2401  prev_status &= ~ VP_START;
2402  if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
2403  h->er.error_occurred = 1;
2404  }
2405  }
2406 
2407  if (h->pps.cabac) {
2408  /* realign */
2409  align_get_bits(&h->gb);
2410 
2411  /* init cabac */
2412  ff_init_cabac_decoder(&h->cabac,
2413  h->gb.buffer + get_bits_count(&h->gb) / 8,
2414  (get_bits_left(&h->gb) + 7) / 8);
2415 
2416  ff_h264_init_cabac_states(h);
2417 
2418  for (;;) {
2419  // START_TIMER
2420  int ret = ff_h264_decode_mb_cabac(h);
2421  int eos;
2422  // STOP_TIMER("decode_mb_cabac")
2423 
2424  if (ret >= 0)
2425  ff_h264_hl_decode_mb(h);
2426 
2427  // FIXME optimal? or let mb_decode decode 16x32 ?
2428  if (ret >= 0 && FRAME_MBAFF(h)) {
2429  h->mb_y++;
2430 
2431  ret = ff_h264_decode_mb_cabac(h);
2432 
2433  if (ret >= 0)
2434  ff_h264_hl_decode_mb(h);
2435  h->mb_y--;
2436  }
2437  eos = get_cabac_terminate(&h->cabac);
2438 
2439  if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2440  h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2441  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
2442  h->mb_y, ER_MB_END);
2443  if (h->mb_x >= lf_x_start)
2444  loop_filter(h, lf_x_start, h->mb_x + 1);
2445  return 0;
2446  }
2447  if (h->cabac.bytestream > h->cabac.bytestream_end + 2 )
2448  av_log(h->avctx, AV_LOG_DEBUG, "bytestream overread %"PTRDIFF_SPECIFIER"\n", h->cabac.bytestream_end - h->cabac.bytestream);
2449  if (ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 4) {
2450  av_log(h->avctx, AV_LOG_ERROR,
2451  "error while decoding MB %d %d, bytestream %"PTRDIFF_SPECIFIER"\n",
2452  h->mb_x, h->mb_y,
2453  h->cabac.bytestream_end - h->cabac.bytestream);
2454  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2455  h->mb_y, ER_MB_ERROR);
2456  return AVERROR_INVALIDDATA;
2457  }
2458 
2459  if (++h->mb_x >= h->mb_width) {
2460  loop_filter(h, lf_x_start, h->mb_x);
2461  h->mb_x = lf_x_start = 0;
2462  decode_finish_row(h);
2463  ++h->mb_y;
2464  if (FIELD_OR_MBAFF_PICTURE(h)) {
2465  ++h->mb_y;
2466  if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
2467  predict_field_decoding_flag(h);
2468  }
2469  }
2470 
2471  if (eos || h->mb_y >= h->mb_height) {
2472  tprintf(h->avctx, "slice end %d %d\n",
2473  get_bits_count(&h->gb), h->gb.size_in_bits);
2474  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
2475  h->mb_y, ER_MB_END);
2476  if (h->mb_x > lf_x_start)
2477  loop_filter(h, lf_x_start, h->mb_x);
2478  return 0;
2479  }
2480  }
2481  } else {
2482  for (;;) {
2483  int ret = ff_h264_decode_mb_cavlc(h);
2484 
2485  if (ret >= 0)
2486  ff_h264_hl_decode_mb(h);
2487 
2488  // FIXME optimal? or let mb_decode decode 16x32 ?
2489  if (ret >= 0 && FRAME_MBAFF(h)) {
2490  h->mb_y++;
2491  ret = ff_h264_decode_mb_cavlc(h);
2492 
2493  if (ret >= 0)
2494  ff_h264_hl_decode_mb(h);
2495  h->mb_y--;
2496  }
2497 
2498  if (ret < 0) {
2499  av_log(h->avctx, AV_LOG_ERROR,
2500  "error while decoding MB %d %d\n", h->mb_x, h->mb_y);
2501  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2502  h->mb_y, ER_MB_ERROR);
2503  return ret;
2504  }
2505 
2506  if (++h->mb_x >= h->mb_width) {
2507  loop_filter(h, lf_x_start, h->mb_x);
2508  h->mb_x = lf_x_start = 0;
2509  decode_finish_row(h);
2510  ++h->mb_y;
2511  if (FIELD_OR_MBAFF_PICTURE(h)) {
2512  ++h->mb_y;
2513  if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
2514  predict_field_decoding_flag(h);
2515  }
2516  if (h->mb_y >= h->mb_height) {
2517  tprintf(h->avctx, "slice end %d %d\n",
2518  get_bits_count(&h->gb), h->gb.size_in_bits);
2519 
2520  if ( get_bits_left(&h->gb) == 0
2521  || get_bits_left(&h->gb) > 0 && !(h->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
2522  er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2523  h->mb_x - 1, h->mb_y, ER_MB_END);
2524 
2525  return 0;
2526  } else {
2527  er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2528  h->mb_x, h->mb_y, ER_MB_END);
2529 
2530  return AVERROR_INVALIDDATA;
2531  }
2532  }
2533  }
2534 
2535  if (get_bits_left(&h->gb) <= 0 && h->mb_skip_run <= 0) {
2536  tprintf(h->avctx, "slice end %d %d\n",
2537  get_bits_count(&h->gb), h->gb.size_in_bits);
2538 
2539  if (get_bits_left(&h->gb) == 0) {
2540  er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2541  h->mb_x - 1, h->mb_y, ER_MB_END);
2542  if (h->mb_x > lf_x_start)
2543  loop_filter(h, lf_x_start, h->mb_x);
2544 
2545  return 0;
2546  } else {
2547  er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2548  h->mb_y, ER_MB_ERROR);
2549 
2550  return AVERROR_INVALIDDATA;
2551  }
2552  }
2553  }
2554  }
2555 }
2556 
2557 /**
2558  * Call decode_slice() for each context.
2559  *
2560  * @param h h264 master context
2561  * @param context_count number of contexts to execute
2562  */
2563 int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
2564 {
2565  AVCodecContext *const avctx = h->avctx;
2566  H264Context *hx;
2567  int i;
2568 
2569  av_assert0(h->mb_y < h->mb_height);
2570 
2571  if (h->avctx->hwaccel ||
2572  h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
2573  return 0;
2574  if (context_count == 1) {
2575  return decode_slice(avctx, &h);
2576  } else {
2577  av_assert0(context_count > 0);
2578  for (i = 1; i < context_count; i++) {
2579  hx = h->thread_context[i];
2580  if (CONFIG_ERROR_RESILIENCE) {
2581  hx->er.error_count = 0;
2582  }
2583  hx->x264_build = h->x264_build;
2584  }
2585 
2586  avctx->execute(avctx, decode_slice, h->thread_context,
2587  NULL, context_count, sizeof(void *));
2588 
2589  /* pull back stuff from slices to master context */
2590  hx = h->thread_context[context_count - 1];
2591  h->mb_x = hx->mb_x;
2592  h->mb_y = hx->mb_y;
2593  h->droppable = hx->droppable;
2594  h->picture_structure = hx->picture_structure;
2595  if (CONFIG_ERROR_RESILIENCE) {
2596  for (i = 1; i < context_count; i++)
2597  h->er.error_count += h->thread_context[i]->er.error_count;
2598  }
2599  }
2600 
2601  return 0;
2602 }
Generated on Fri Dec 5 2014 04:41:55 for FFmpeg by   doxygen 1.8.2