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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / h264_slice.c
CommitLineData
2ba45a60
DM		 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
47static 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
55static 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
63static 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
70static 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
89static 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)]
109static 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
128static 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
137static 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
141static 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
150static 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
168static 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
187static 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
200static 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
221static 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
248static 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;
314fail:
315 ff_h264_unref_picture(h, pic);
316 return (ret < 0) ? ret : AVERROR(ENOMEM);
317}
318
319static 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
328static 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
348static 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
375static 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
401void 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 */
423static 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
452static 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
467static 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
491static int h264_slice_header_init(H264Context *h, int reinit);
492
493int 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
719static 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
810static 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 */
911static 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 */
975static 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 */
1012static 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
1037static 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 */
1127static 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
1169static 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->time_base.num, &h->avctx->time_base.den,
1185 h->sps.num_units_in_tick, 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;
1271fail:
1272 ff_h264_free_tables(h, 0);
1273 h->context_initialized = 0;
1274 return ret;
1275}
1276
1277static 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 */
1298int 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
2014int 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
2032static 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 */
2116static 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
2261static 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
2330static 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 */
2343static 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
2374static 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
2384static 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 */
2563int 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}
ffmpeg Piment Noir Debian package repository