path: root/libavcodec/h264_slice.c (plain)
blob: acf6a73f60ff63bcf17da4f8f6a95120df90cd74

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 / MPEG-4 part10 codec.
25	* @author Michael Niedermayer <michaelni@gmx.at>
26	*/
27
28	#include "libavutil/avassert.h"
29	#include "libavutil/display.h"
30	#include "libavutil/imgutils.h"
31	#include "libavutil/stereo3d.h"
32	#include "libavutil/timer.h"
33	#include "internal.h"
34	#include "cabac.h"
35	#include "cabac_functions.h"
36	#include "error_resilience.h"
37	#include "avcodec.h"
38	#include "h264.h"
39	#include "h264dec.h"
40	#include "h264data.h"
41	#include "h264chroma.h"
42	#include "h264_mvpred.h"
43	#include "h264_ps.h"
44	#include "golomb.h"
45	#include "mathops.h"
46	#include "mpegutils.h"
47	#include "mpegvideo.h"
48	#include "rectangle.h"
49	#include "thread.h"
50
51	static const uint8_t field_scan[16+1] = {
52	0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
53	0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
54	2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
55	3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
56	};
57
58	static const uint8_t field_scan8x8[64+1] = {
59	0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
60	1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
61	2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
62	0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
63	2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
64	2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
65	2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
66	3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
67	3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
68	4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
69	4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
70	5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
71	5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
72	7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
73	6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
74	7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
75	};
76
77	static const uint8_t field_scan8x8_cavlc[64+1] = {
78	0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
79	2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
80	3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
81	5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
82	0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
83	1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
84	3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
85	5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
86	0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
87	1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
88	3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
89	5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
90	1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
91	1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
92	3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
93	6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
94	};
95
96	// zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
97	static const uint8_t zigzag_scan8x8_cavlc[64+1] = {
98	0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
99	4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
100	3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
101	2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
102	1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
103	3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
104	2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
105	3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
106	0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
107	2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
108	1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
109	4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
110	0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
111	1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
112	0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
113	5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
114	};
115
116	static void release_unused_pictures(H264Context *h, int remove_current)
117	{
118	int i;
119
120	/* release non reference frames */
121	for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
122	if (h->DPB[i].f->buf[0] && !h->DPB[i].reference &&
123	(remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
124	ff_h264_unref_picture(h, &h->DPB[i]);
125	}
126	}
127	}
128
129	static int alloc_scratch_buffers(H264SliceContext *sl, int linesize)
130	{
131	const H264Context *h = sl->h264;
132	int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
133
134	av_fast_malloc(&sl->bipred_scratchpad, &sl->bipred_scratchpad_allocated, 16 * 6 * alloc_size);
135	// edge emu needs blocksize + filter length - 1
136	// (= 21x21 for H.264)
137	av_fast_malloc(&sl->edge_emu_buffer, &sl->edge_emu_buffer_allocated, alloc_size * 2 * 21);
138
139	av_fast_mallocz(&sl->top_borders[0], &sl->top_borders_allocated[0],
140	h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
141	av_fast_mallocz(&sl->top_borders[1], &sl->top_borders_allocated[1],
142	h->mb_width * 16 * 3 * sizeof(uint8_t) * 2);
143
144	if (!sl->bipred_scratchpad || !sl->edge_emu_buffer ||
145	!sl->top_borders[0] || !sl->top_borders[1]) {
146	av_freep(&sl->bipred_scratchpad);
147	av_freep(&sl->edge_emu_buffer);
148	av_freep(&sl->top_borders[0]);
149	av_freep(&sl->top_borders[1]);
150
151	sl->bipred_scratchpad_allocated = 0;
152	sl->edge_emu_buffer_allocated = 0;
153	sl->top_borders_allocated[0] = 0;
154	sl->top_borders_allocated[1] = 0;
155	return AVERROR(ENOMEM);
156	}
157
158	return 0;
159	}
160
161	static int init_table_pools(H264Context *h)
162	{
163	const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
164	const int mb_array_size = h->mb_stride * h->mb_height;
165	const int b4_stride = h->mb_width * 4 + 1;
166	const int b4_array_size = b4_stride * h->mb_height * 4;
167
168	h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
169	av_buffer_allocz);
170	h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
171	sizeof(uint32_t), av_buffer_allocz);
172	h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
173	sizeof(int16_t), av_buffer_allocz);
174	h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
175
176	if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
177	!h->ref_index_pool) {
178	av_buffer_pool_uninit(&h->qscale_table_pool);
179	av_buffer_pool_uninit(&h->mb_type_pool);
180	av_buffer_pool_uninit(&h->motion_val_pool);
181	av_buffer_pool_uninit(&h->ref_index_pool);
182	return AVERROR(ENOMEM);
183	}
184
185	return 0;
186	}
187
188	static int alloc_picture(H264Context *h, H264Picture *pic)
189	{
190	int i, ret = 0;
191
192	av_assert0(!pic->f->data[0]);
193
194	pic->tf.f = pic->f;
195	ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
196	AV_GET_BUFFER_FLAG_REF : 0);
197	if (ret < 0)
198	goto fail;
199
200	pic->crop = h->ps.sps->crop;
201	pic->crop_top = h->ps.sps->crop_top;
202	pic->crop_left= h->ps.sps->crop_left;
203
204	if (h->avctx->hwaccel) {
205	const AVHWAccel *hwaccel = h->avctx->hwaccel;
206	av_assert0(!pic->hwaccel_picture_private);
207	if (hwaccel->frame_priv_data_size) {
208	pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
209	if (!pic->hwaccel_priv_buf)
210	return AVERROR(ENOMEM);
211	pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
212	}
213	}
214	if (CONFIG_GRAY && !h->avctx->hwaccel && h->flags & AV_CODEC_FLAG_GRAY && pic->f->data[2]) {
215	int h_chroma_shift, v_chroma_shift;
216	av_pix_fmt_get_chroma_sub_sample(pic->f->format,
217	&h_chroma_shift, &v_chroma_shift);
218
219	for(i=0; i<AV_CEIL_RSHIFT(pic->f->height, v_chroma_shift); i++) {
220	memset(pic->f->data[1] + pic->f->linesize[1]*i,
221	0x80, AV_CEIL_RSHIFT(pic->f->width, h_chroma_shift));
222	memset(pic->f->data[2] + pic->f->linesize[2]*i,
223	0x80, AV_CEIL_RSHIFT(pic->f->width, h_chroma_shift));
224	}
225	}
226
227	if (!h->qscale_table_pool) {
228	ret = init_table_pools(h);
229	if (ret < 0)
230	goto fail;
231	}
232
233	pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
234	pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
235	if (!pic->qscale_table_buf || !pic->mb_type_buf)
236	goto fail;
237
238	pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
239	pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
240
241	for (i = 0; i < 2; i++) {
242	pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
243	pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
244	if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
245	goto fail;
246
247	pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
248	pic->ref_index[i] = pic->ref_index_buf[i]->data;
249	}
250
251	return 0;
252	fail:
253	ff_h264_unref_picture(h, pic);
254	return (ret < 0) ? ret : AVERROR(ENOMEM);
255	}
256
257	static int find_unused_picture(H264Context *h)
258	{
259	int i;
260
261	for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
262	if (!h->DPB[i].f->buf[0])
263	return i;
264	}
265	return AVERROR_INVALIDDATA;
266	}
267
268
269	#define IN_RANGE(a, b, size) (((void*)(a) >= (void*)(b)) && ((void*)(a) < (void*)((b) + (size))))
270
271	#define REBASE_PICTURE(pic, new_ctx, old_ctx) \
272	(((pic) && (pic) >= (old_ctx)->DPB && \
273	(pic) < (old_ctx)->DPB + H264_MAX_PICTURE_COUNT) ? \
274	&(new_ctx)->DPB[(pic) - (old_ctx)->DPB] : NULL)
275
276	static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
277	H264Context *new_base,
278	H264Context *old_base)
279	{
280	int i;
281
282	for (i = 0; i < count; i++) {
283	av_assert1(!from[i] ||
284	IN_RANGE(from[i], old_base, 1) ||
285	IN_RANGE(from[i], old_base->DPB, H264_MAX_PICTURE_COUNT));
286	to[i] = REBASE_PICTURE(from[i], new_base, old_base);
287	}
288	}
289
290	static int h264_slice_header_init(H264Context *h);
291
292	int ff_h264_update_thread_context(AVCodecContext *dst,
293	const AVCodecContext *src)
294	{
295	H264Context *h = dst->priv_data, *h1 = src->priv_data;
296	int inited = h->context_initialized, err = 0;
297	int need_reinit = 0;
298	int i, ret;
299
300	if (dst == src)
301	return 0;
302
303	// We can't fail if SPS isn't set at it breaks current skip_frame code
304	//if (!h1->ps.sps)
305	// return AVERROR_INVALIDDATA;
306
307	if (inited &&
308	(h->width != h1->width ||
309	h->height != h1->height ||
310	h->mb_width != h1->mb_width ||
311	h->mb_height != h1->mb_height ||
312	!h->ps.sps ||
313	h->ps.sps->bit_depth_luma != h1->ps.sps->bit_depth_luma ||
314	h->ps.sps->chroma_format_idc != h1->ps.sps->chroma_format_idc ||
315	h->ps.sps->colorspace != h1->ps.sps->colorspace)) {
316	need_reinit = 1;
317	}
318
319	/* copy block_offset since frame_start may not be called */
320	memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
321
322	// SPS/PPS
323	for (i = 0; i < FF_ARRAY_ELEMS(h->ps.sps_list); i++) {
324	av_buffer_unref(&h->ps.sps_list[i]);
325	if (h1->ps.sps_list[i]) {
326	h->ps.sps_list[i] = av_buffer_ref(h1->ps.sps_list[i]);
327	if (!h->ps.sps_list[i])
328	return AVERROR(ENOMEM);
329	}
330	}
331	for (i = 0; i < FF_ARRAY_ELEMS(h->ps.pps_list); i++) {
332	av_buffer_unref(&h->ps.pps_list[i]);
333	if (h1->ps.pps_list[i]) {
334	h->ps.pps_list[i] = av_buffer_ref(h1->ps.pps_list[i]);
335	if (!h->ps.pps_list[i])
336	return AVERROR(ENOMEM);
337	}
338	}
339
340	av_buffer_unref(&h->ps.pps_ref);
341	av_buffer_unref(&h->ps.sps_ref);
342	h->ps.pps = NULL;
343	h->ps.sps = NULL;
344	if (h1->ps.pps_ref) {
345	h->ps.pps_ref = av_buffer_ref(h1->ps.pps_ref);
346	if (!h->ps.pps_ref)
347	return AVERROR(ENOMEM);
348	h->ps.pps = (const PPS*)h->ps.pps_ref->data;
349	}
350	if (h1->ps.sps_ref) {
351	h->ps.sps_ref = av_buffer_ref(h1->ps.sps_ref);
352	if (!h->ps.sps_ref)
353	return AVERROR(ENOMEM);
354	h->ps.sps = (const SPS*)h->ps.sps_ref->data;
355	}
356
357	if (need_reinit || !inited) {
358	h->width = h1->width;
359	h->height = h1->height;
360	h->mb_height = h1->mb_height;
361	h->mb_width = h1->mb_width;
362	h->mb_num = h1->mb_num;
363	h->mb_stride = h1->mb_stride;
364	h->b_stride = h1->b_stride;
365
366	if (h->context_initialized || h1->context_initialized) {
367	if ((err = h264_slice_header_init(h)) < 0) {
368	av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed");
369	return err;
370	}
371	}
372
373	/* copy block_offset since frame_start may not be called */
374	memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
375	}
376
377	h->avctx->coded_height = h1->avctx->coded_height;
378	h->avctx->coded_width = h1->avctx->coded_width;
379	h->avctx->width = h1->avctx->width;
380	h->avctx->height = h1->avctx->height;
381	h->coded_picture_number = h1->coded_picture_number;
382	h->first_field = h1->first_field;
383	h->picture_structure = h1->picture_structure;
384	h->mb_aff_frame = h1->mb_aff_frame;
385	h->droppable = h1->droppable;
386
387	for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
388	ff_h264_unref_picture(h, &h->DPB[i]);
389	if (h1->DPB[i].f->buf[0] &&
390	(ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
391	return ret;
392	}
393
394	h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
395	ff_h264_unref_picture(h, &h->cur_pic);
396	if (h1->cur_pic.f->buf[0]) {
397	ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic);
398	if (ret < 0)
399	return ret;
400	}
401
402	h->enable_er = h1->enable_er;
403	h->workaround_bugs = h1->workaround_bugs;
404	h->droppable = h1->droppable;
405
406	// extradata/NAL handling
407	h->is_avc = h1->is_avc;
408	h->nal_length_size = h1->nal_length_size;
409	h->sei.unregistered.x264_build = h1->sei.unregistered.x264_build;
410
411	memcpy(&h->poc, &h1->poc, sizeof(h->poc));
412
413	memcpy(h->default_ref, h1->default_ref, sizeof(h->default_ref));
414	memcpy(h->short_ref, h1->short_ref, sizeof(h->short_ref));
415	memcpy(h->long_ref, h1->long_ref, sizeof(h->long_ref));
416	memcpy(h->delayed_pic, h1->delayed_pic, sizeof(h->delayed_pic));
417	memcpy(h->last_pocs, h1->last_pocs, sizeof(h->last_pocs));
418
419	h->next_output_pic = h1->next_output_pic;
420	h->next_outputed_poc = h1->next_outputed_poc;
421
422	memcpy(h->mmco, h1->mmco, sizeof(h->mmco));
423	h->nb_mmco = h1->nb_mmco;
424	h->mmco_reset = h1->mmco_reset;
425	h->explicit_ref_marking = h1->explicit_ref_marking;
426	h->long_ref_count = h1->long_ref_count;
427	h->short_ref_count = h1->short_ref_count;
428
429	copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
430	copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
431	copy_picture_range(h->delayed_pic, h1->delayed_pic,
432	MAX_DELAYED_PIC_COUNT + 2, h, h1);
433
434	h->frame_recovered = h1->frame_recovered;
435
436	if (!h->cur_pic_ptr)
437	return 0;
438
439	if (!h->droppable) {
440	err = ff_h264_execute_ref_pic_marking(h);
441	h->poc.prev_poc_msb = h->poc.poc_msb;
442	h->poc.prev_poc_lsb = h->poc.poc_lsb;
443	}
444	h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
445	h->poc.prev_frame_num = h->poc.frame_num;
446
447	h->recovery_frame = h1->recovery_frame;
448
449	return err;
450	}
451
452	static int h264_frame_start(H264Context *h)
453	{
454	H264Picture *pic;
455	int i, ret;
456	const int pixel_shift = h->pixel_shift;
457	int c[4] = {
458	1<<(h->ps.sps->bit_depth_luma-1),
459	1<<(h->ps.sps->bit_depth_chroma-1),
460	1<<(h->ps.sps->bit_depth_chroma-1),
461	-1
462	};
463
464	if (!ff_thread_can_start_frame(h->avctx)) {
465	av_log(h->avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
466	return -1;
467	}
468
469	release_unused_pictures(h, 1);
470	h->cur_pic_ptr = NULL;
471
472	i = find_unused_picture(h);
473	if (i < 0) {
474	av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
475	return i;
476	}
477	pic = &h->DPB[i];
478
479	pic->reference = h->droppable ? 0 : h->picture_structure;
480	pic->f->coded_picture_number = h->coded_picture_number++;
481	pic->field_picture = h->picture_structure != PICT_FRAME;
482	pic->frame_num = h->poc.frame_num;
483	/*
484	* Zero key_frame here; IDR markings per slice in frame or fields are ORed
485	* in later.
486	* See decode_nal_units().
487	*/
488	pic->f->key_frame = 0;
489	pic->mmco_reset = 0;
490	pic->recovered = 0;
491	pic->invalid_gap = 0;
492	pic->sei_recovery_frame_cnt = h->sei.recovery_point.recovery_frame_cnt;
493
494	pic->f->pict_type = h->slice_ctx[0].slice_type;
495
496	if ((ret = alloc_picture(h, pic)) < 0)
497	return ret;
498	if(!h->frame_recovered && !h->avctx->hwaccel
499	#if FF_API_CAP_VDPAU
500	&& !(h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
501	#endif
502	)
503	ff_color_frame(pic->f, c);
504
505	h->cur_pic_ptr = pic;
506	ff_h264_unref_picture(h, &h->cur_pic);
507	if (CONFIG_ERROR_RESILIENCE) {
508	ff_h264_set_erpic(&h->slice_ctx[0].er.cur_pic, NULL);
509	}
510
511	if ((ret = ff_h264_ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
512	return ret;
513
514	for (i = 0; i < h->nb_slice_ctx; i++) {
515	h->slice_ctx[i].linesize = h->cur_pic_ptr->f->linesize[0];
516	h->slice_ctx[i].uvlinesize = h->cur_pic_ptr->f->linesize[1];
517	}
518
519	if (CONFIG_ERROR_RESILIENCE && h->enable_er) {
520	ff_er_frame_start(&h->slice_ctx[0].er);
521	ff_h264_set_erpic(&h->slice_ctx[0].er.last_pic, NULL);
522	ff_h264_set_erpic(&h->slice_ctx[0].er.next_pic, NULL);
523	}
524
525	for (i = 0; i < 16; i++) {
526	h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
527	h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);
528	}
529	for (i = 0; i < 16; i++) {
530	h->block_offset[16 + i] =
531	h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
532	h->block_offset[48 + 16 + i] =
533	h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);
534	}
535
536	/* We mark the current picture as non-reference after allocating it, so
537	* that if we break out due to an error it can be released automatically
538	* in the next ff_mpv_frame_start().
539	*/
540	h->cur_pic_ptr->reference = 0;
541
542	h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
543
544	h->next_output_pic = NULL;
545
546	h->postpone_filter = 0;
547
548	h->mb_aff_frame = h->ps.sps->mb_aff && (h->picture_structure == PICT_FRAME);
549
550	assert(h->cur_pic_ptr->long_ref == 0);
551
552	return 0;
553	}
554
555	static av_always_inline void backup_mb_border(const H264Context *h, H264SliceContext *sl,
556	uint8_t *src_y,
557	uint8_t *src_cb, uint8_t *src_cr,
558	int linesize, int uvlinesize,
559	int simple)
560	{
561	uint8_t *top_border;
562	int top_idx = 1;
563	const int pixel_shift = h->pixel_shift;
564	int chroma444 = CHROMA444(h);
565	int chroma422 = CHROMA422(h);
566
567	src_y -= linesize;
568	src_cb -= uvlinesize;
569	src_cr -= uvlinesize;
570
571	if (!simple && FRAME_MBAFF(h)) {
572	if (sl->mb_y & 1) {
573	if (!MB_MBAFF(sl)) {
574	top_border = sl->top_borders[0][sl->mb_x];
575	AV_COPY128(top_border, src_y + 15 * linesize);
576	if (pixel_shift)
577	AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
578	if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
579	if (chroma444) {
580	if (pixel_shift) {
581	AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
582	AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
583	AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
584	AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
585	} else {
586	AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
587	AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
588	}
589	} else if (chroma422) {
590	if (pixel_shift) {
591	AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
592	AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
593	} else {
594	AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
595	AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
596	}
597	} else {
598	if (pixel_shift) {
599	AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
600	AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
601	} else {
602	AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
603	AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
604	}
605	}
606	}
607	}
608	} else if (MB_MBAFF(sl)) {
609	top_idx = 0;
610	} else
611	return;
612	}
613
614	top_border = sl->top_borders[top_idx][sl->mb_x];
615	/* There are two lines saved, the line above the top macroblock
616	* of a pair, and the line above the bottom macroblock. */
617	AV_COPY128(top_border, src_y + 16 * linesize);
618	if (pixel_shift)
619	AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
620
621	if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
622	if (chroma444) {
623	if (pixel_shift) {
624	AV_COPY128(top_border + 32, src_cb + 16 * linesize);
625	AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
626	AV_COPY128(top_border + 64, src_cr + 16 * linesize);
627	AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
628	} else {
629	AV_COPY128(top_border + 16, src_cb + 16 * linesize);
630	AV_COPY128(top_border + 32, src_cr + 16 * linesize);
631	}
632	} else if (chroma422) {
633	if (pixel_shift) {
634	AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
635	AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
636	} else {
637	AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
638	AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
639	}
640	} else {
641	if (pixel_shift) {
642	AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
643	AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
644	} else {
645	AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
646	AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
647	}
648	}
649	}
650	}
651
652	/**
653	* Initialize implicit_weight table.
654	* @param field 0/1 initialize the weight for interlaced MBAFF
655	* -1 initializes the rest
656	*/
657	static void implicit_weight_table(const H264Context *h, H264SliceContext *sl, int field)
658	{
659	int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
660
661	for (i = 0; i < 2; i++) {
662	sl->pwt.luma_weight_flag[i] = 0;
663	sl->pwt.chroma_weight_flag[i] = 0;
664	}
665
666	if (field < 0) {
667	if (h->picture_structure == PICT_FRAME) {
668	cur_poc = h->cur_pic_ptr->poc;
669	} else {
670	cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
671	}
672	if (sl->ref_count[0] == 1 && sl->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
673	sl->ref_list[0][0].poc + (int64_t)sl->ref_list[1][0].poc == 2 * cur_poc) {
674	sl->pwt.use_weight = 0;
675	sl->pwt.use_weight_chroma = 0;
676	return;
677	}
678	ref_start = 0;
679	ref_count0 = sl->ref_count[0];
680	ref_count1 = sl->ref_count[1];
681	} else {
682	cur_poc = h->cur_pic_ptr->field_poc[field];
683	ref_start = 16;
684	ref_count0 = 16 + 2 * sl->ref_count[0];
685	ref_count1 = 16 + 2 * sl->ref_count[1];
686	}
687
688	sl->pwt.use_weight = 2;
689	sl->pwt.use_weight_chroma = 2;
690	sl->pwt.luma_log2_weight_denom = 5;
691	sl->pwt.chroma_log2_weight_denom = 5;
692
693	for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
694	int64_t poc0 = sl->ref_list[0][ref0].poc;
695	for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
696	int w = 32;
697	if (!sl->ref_list[0][ref0].parent->long_ref && !sl->ref_list[1][ref1].parent->long_ref) {
698	int poc1 = sl->ref_list[1][ref1].poc;
699	int td = av_clip_int8(poc1 - poc0);
700	if (td) {
701	int tb = av_clip_int8(cur_poc - poc0);
702	int tx = (16384 + (FFABS(td) >> 1)) / td;
703	int dist_scale_factor = (tb * tx + 32) >> 8;
704	if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
705	w = 64 - dist_scale_factor;
706	}
707	}
708	if (field < 0) {
709	sl->pwt.implicit_weight[ref0][ref1][0] =
710	sl->pwt.implicit_weight[ref0][ref1][1] = w;
711	} else {
712	sl->pwt.implicit_weight[ref0][ref1][field] = w;
713	}
714	}
715	}
716	}
717
718	/**
719	* initialize scan tables
720	*/
721	static void init_scan_tables(H264Context *h)
722	{
723	int i;
724	for (i = 0; i < 16; i++) {
725	#define TRANSPOSE(x) ((x) >> 2) | (((x) << 2) & 0xF)
726	h->zigzag_scan[i] = TRANSPOSE(ff_zigzag_scan[i]);
727	h->field_scan[i] = TRANSPOSE(field_scan[i]);
728	#undef TRANSPOSE
729	}
730	for (i = 0; i < 64; i++) {
731	#define TRANSPOSE(x) ((x) >> 3) | (((x) & 7) << 3)
732	h->zigzag_scan8x8[i] = TRANSPOSE(ff_zigzag_direct[i]);
733	h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
734	h->field_scan8x8[i] = TRANSPOSE(field_scan8x8[i]);
735	h->field_scan8x8_cavlc[i] = TRANSPOSE(field_scan8x8_cavlc[i]);
736	#undef TRANSPOSE
737	}
738	if (h->ps.sps->transform_bypass) { // FIXME same ugly
739	memcpy(h->zigzag_scan_q0 , ff_zigzag_scan , sizeof(h->zigzag_scan_q0 ));
740	memcpy(h->zigzag_scan8x8_q0 , ff_zigzag_direct , sizeof(h->zigzag_scan8x8_q0 ));
741	memcpy(h->zigzag_scan8x8_cavlc_q0 , zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
742	memcpy(h->field_scan_q0 , field_scan , sizeof(h->field_scan_q0 ));
743	memcpy(h->field_scan8x8_q0 , field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
744	memcpy(h->field_scan8x8_cavlc_q0 , field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
745	} else {
746	memcpy(h->zigzag_scan_q0 , h->zigzag_scan , sizeof(h->zigzag_scan_q0 ));
747	memcpy(h->zigzag_scan8x8_q0 , h->zigzag_scan8x8 , sizeof(h->zigzag_scan8x8_q0 ));
748	memcpy(h->zigzag_scan8x8_cavlc_q0 , h->zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
749	memcpy(h->field_scan_q0 , h->field_scan , sizeof(h->field_scan_q0 ));
750	memcpy(h->field_scan8x8_q0 , h->field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
751	memcpy(h->field_scan8x8_cavlc_q0 , h->field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
752	}
753	}
754
755	static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
756	{
757	#define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
758	CONFIG_H264_D3D11VA_HWACCEL + \
759	CONFIG_H264_VAAPI_HWACCEL + \
760	(CONFIG_H264_VDA_HWACCEL * 2) + \
761	CONFIG_H264_VIDEOTOOLBOX_HWACCEL + \
762	CONFIG_H264_VDPAU_HWACCEL)
763	enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmt = pix_fmts;
764	const enum AVPixelFormat *choices = pix_fmts;
765	int i;
766
767	switch (h->ps.sps->bit_depth_luma) {
768	case 9:
769	if (CHROMA444(h)) {
770	if (h->avctx->colorspace == AVCOL_SPC_RGB) {
771	*fmt++ = AV_PIX_FMT_GBRP9;
772	} else
773	*fmt++ = AV_PIX_FMT_YUV444P9;
774	} else if (CHROMA422(h))
775	*fmt++ = AV_PIX_FMT_YUV422P9;
776	else
777	*fmt++ = AV_PIX_FMT_YUV420P9;
778	break;
779	case 10:
780	if (CHROMA444(h)) {
781	if (h->avctx->colorspace == AVCOL_SPC_RGB) {
782	*fmt++ = AV_PIX_FMT_GBRP10;
783	} else
784	*fmt++ = AV_PIX_FMT_YUV444P10;
785	} else if (CHROMA422(h))
786	*fmt++ = AV_PIX_FMT_YUV422P10;
787	else
788	*fmt++ = AV_PIX_FMT_YUV420P10;
789	break;
790	case 12:
791	if (CHROMA444(h)) {
792	if (h->avctx->colorspace == AVCOL_SPC_RGB) {
793	*fmt++ = AV_PIX_FMT_GBRP12;
794	} else
795	*fmt++ = AV_PIX_FMT_YUV444P12;
796	} else if (CHROMA422(h))
797	*fmt++ = AV_PIX_FMT_YUV422P12;
798	else
799	*fmt++ = AV_PIX_FMT_YUV420P12;
800	break;
801	case 14:
802	if (CHROMA444(h)) {
803	if (h->avctx->colorspace == AVCOL_SPC_RGB) {
804	*fmt++ = AV_PIX_FMT_GBRP14;
805	} else
806	*fmt++ = AV_PIX_FMT_YUV444P14;
807	} else if (CHROMA422(h))
808	*fmt++ = AV_PIX_FMT_YUV422P14;
809	else
810	*fmt++ = AV_PIX_FMT_YUV420P14;
811	break;
812	case 8:
813	#if CONFIG_H264_VDPAU_HWACCEL
814	*fmt++ = AV_PIX_FMT_VDPAU;
815	#endif
816	if (CHROMA444(h)) {
817	if (h->avctx->colorspace == AVCOL_SPC_RGB)
818	*fmt++ = AV_PIX_FMT_GBRP;
819	else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
820	*fmt++ = AV_PIX_FMT_YUVJ444P;
821	else
822	*fmt++ = AV_PIX_FMT_YUV444P;
823	} else if (CHROMA422(h)) {
824	if (h->avctx->color_range == AVCOL_RANGE_JPEG)
825	*fmt++ = AV_PIX_FMT_YUVJ422P;
826	else
827	*fmt++ = AV_PIX_FMT_YUV422P;
828	} else {
829	#if CONFIG_H264_DXVA2_HWACCEL
830	*fmt++ = AV_PIX_FMT_DXVA2_VLD;
831	#endif
832	#if CONFIG_H264_D3D11VA_HWACCEL
833	*fmt++ = AV_PIX_FMT_D3D11VA_VLD;
834	#endif
835	#if CONFIG_H264_VAAPI_HWACCEL
836	*fmt++ = AV_PIX_FMT_VAAPI;
837	#endif
838	#if CONFIG_H264_VDA_HWACCEL
839	*fmt++ = AV_PIX_FMT_VDA_VLD;
840	*fmt++ = AV_PIX_FMT_VDA;
841	#endif
842	#if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
843	*fmt++ = AV_PIX_FMT_VIDEOTOOLBOX;
844	#endif
845	if (h->avctx->codec->pix_fmts)
846	choices = h->avctx->codec->pix_fmts;
847	else if (h->avctx->color_range == AVCOL_RANGE_JPEG)
848	*fmt++ = AV_PIX_FMT_YUVJ420P;
849	else
850	*fmt++ = AV_PIX_FMT_YUV420P;
851	}
852	break;
853	default:
854	av_log(h->avctx, AV_LOG_ERROR,
855	"Unsupported bit depth %d\n", h->ps.sps->bit_depth_luma);
856	return AVERROR_INVALIDDATA;
857	}
858
859	*fmt = AV_PIX_FMT_NONE;
860
861	for (i=0; choices[i] != AV_PIX_FMT_NONE; i++)
862	if (choices[i] == h->avctx->pix_fmt && !force_callback)
863	return choices[i];
864	return ff_thread_get_format(h->avctx, choices);
865	}
866
867	/* export coded and cropped frame dimensions to AVCodecContext */
868	static int init_dimensions(H264Context *h)
869	{
870	const SPS *sps = (const SPS*)h->ps.sps;
871	int width = h->width - (sps->crop_right + sps->crop_left);
872	int height = h->height - (sps->crop_top + sps->crop_bottom);
873	av_assert0(sps->crop_right + sps->crop_left < (unsigned)h->width);
874	av_assert0(sps->crop_top + sps->crop_bottom < (unsigned)h->height);
875
876	/* handle container cropping */
877	if (FFALIGN(h->avctx->width, 16) == FFALIGN(width, 16) &&
878	FFALIGN(h->avctx->height, 16) == FFALIGN(height, 16) &&
879	h->avctx->width <= width &&
880	h->avctx->height <= height
881	) {
882	width = h->avctx->width;
883	height = h->avctx->height;
884	}
885
886	h->avctx->coded_width = h->width;
887	h->avctx->coded_height = h->height;
888	h->avctx->width = width;
889	h->avctx->height = height;
890
891	return 0;
892	}
893
894	static int h264_slice_header_init(H264Context *h)
895	{
896	const SPS *sps = h->ps.sps;
897	int i, ret;
898
899	ff_set_sar(h->avctx, sps->sar);
900	av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
901	&h->chroma_x_shift, &h->chroma_y_shift);
902
903	if (sps->timing_info_present_flag) {
904	int64_t den = sps->time_scale;
905	if (h->sei.unregistered.x264_build < 44U)
906	den *= 2;
907	av_reduce(&h->avctx->framerate.den, &h->avctx->framerate.num,
908	sps->num_units_in_tick * h->avctx->ticks_per_frame, den, 1 << 30);
909	}
910
911	ff_h264_free_tables(h);
912
913	h->first_field = 0;
914	h->prev_interlaced_frame = 1;
915
916	init_scan_tables(h);
917	ret = ff_h264_alloc_tables(h);
918	if (ret < 0) {
919	av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
920	goto fail;
921	}
922
923	#if FF_API_CAP_VDPAU
924	if (h->avctx->codec &&
925	h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU &&
926	(sps->bit_depth_luma != 8 || sps->chroma_format_idc > 1)) {
927	av_log(h->avctx, AV_LOG_ERROR,
928	"VDPAU decoding does not support video colorspace.\n");
929	ret = AVERROR_INVALIDDATA;
930	goto fail;
931	}
932	#endif
933
934	if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
935	sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13
936	) {
937	av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth %d\n",
938	sps->bit_depth_luma);
939	ret = AVERROR_INVALIDDATA;
940	goto fail;
941	}
942
943	h->cur_bit_depth_luma =
944	h->avctx->bits_per_raw_sample = sps->bit_depth_luma;
945	h->cur_chroma_format_idc = sps->chroma_format_idc;
946	h->pixel_shift = sps->bit_depth_luma > 8;
947	h->chroma_format_idc = sps->chroma_format_idc;
948	h->bit_depth_luma = sps->bit_depth_luma;
949
950	ff_h264dsp_init(&h->h264dsp, sps->bit_depth_luma,
951	sps->chroma_format_idc);
952	ff_h264chroma_init(&h->h264chroma, sps->bit_depth_chroma);
953	ff_h264qpel_init(&h->h264qpel, sps->bit_depth_luma);
954	ff_h264_pred_init(&h->hpc, h->avctx->codec_id, sps->bit_depth_luma,
955	sps->chroma_format_idc);
956	ff_videodsp_init(&h->vdsp, sps->bit_depth_luma);
957
958	if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
959	ret = ff_h264_slice_context_init(h, &h->slice_ctx[0]);
960	if (ret < 0) {
961	av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
962	goto fail;
963	}
964	} else {
965	for (i = 0; i < h->nb_slice_ctx; i++) {
966	H264SliceContext *sl = &h->slice_ctx[i];
967
968	sl->h264 = h;
969	sl->intra4x4_pred_mode = h->intra4x4_pred_mode + i * 8 * 2 * h->mb_stride;
970	sl->mvd_table[0] = h->mvd_table[0] + i * 8 * 2 * h->mb_stride;
971	sl->mvd_table[1] = h->mvd_table[1] + i * 8 * 2 * h->mb_stride;
972
973	if ((ret = ff_h264_slice_context_init(h, sl)) < 0) {
974	av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
975	goto fail;
976	}
977	}
978	}
979
980	h->context_initialized = 1;
981
982	return 0;
983	fail:
984	ff_h264_free_tables(h);
985	h->context_initialized = 0;
986	return ret;
987	}
988
989	static enum AVPixelFormat non_j_pixfmt(enum AVPixelFormat a)
990	{
991	switch (a) {
992	case AV_PIX_FMT_YUVJ420P: return AV_PIX_FMT_YUV420P;
993	case AV_PIX_FMT_YUVJ422P: return AV_PIX_FMT_YUV422P;
994	case AV_PIX_FMT_YUVJ444P: return AV_PIX_FMT_YUV444P;
995	default:
996	return a;
997	}
998	}
999
1000	static int h264_init_ps(H264Context *h, const H264SliceContext *sl, int first_slice)
1001	{
1002	const SPS *sps;
1003	int needs_reinit = 0, must_reinit, ret;
1004
1005	if (first_slice) {
1006	av_buffer_unref(&h->ps.pps_ref);
1007	h->ps.pps = NULL;
1008	h->ps.pps_ref = av_buffer_ref(h->ps.pps_list[sl->pps_id]);
1009	if (!h->ps.pps_ref)
1010	return AVERROR(ENOMEM);
1011	h->ps.pps = (const PPS*)h->ps.pps_ref->data;
1012	}
1013
1014	if (h->ps.sps != (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data) {
1015	av_buffer_unref(&h->ps.sps_ref);
1016	h->ps.sps = NULL;
1017	h->ps.sps_ref = av_buffer_ref(h->ps.sps_list[h->ps.pps->sps_id]);
1018	if (!h->ps.sps_ref)
1019	return AVERROR(ENOMEM);
1020	h->ps.sps = (const SPS*)h->ps.sps_ref->data;
1021
1022	if (h->mb_width != h->ps.sps->mb_width ||
1023	h->mb_height != h->ps.sps->mb_height ||
1024	h->cur_bit_depth_luma != h->ps.sps->bit_depth_luma ||
1025	h->cur_chroma_format_idc != h->ps.sps->chroma_format_idc
1026	)
1027	needs_reinit = 1;
1028
1029	if (h->bit_depth_luma != h->ps.sps->bit_depth_luma ||
1030	h->chroma_format_idc != h->ps.sps->chroma_format_idc)
1031	needs_reinit = 1;
1032	}
1033	sps = h->ps.sps;
1034
1035	must_reinit = (h->context_initialized &&
1036	( 16*sps->mb_width != h->avctx->coded_width
1037	|| 16*sps->mb_height != h->avctx->coded_height
1038	|| h->cur_bit_depth_luma != sps->bit_depth_luma
1039	|| h->cur_chroma_format_idc != sps->chroma_format_idc
1040	|| h->mb_width != sps->mb_width
1041	|| h->mb_height != sps->mb_height
1042	));
1043	if (h->avctx->pix_fmt == AV_PIX_FMT_NONE
1044	|| (non_j_pixfmt(h->avctx->pix_fmt) != non_j_pixfmt(get_pixel_format(h, 0))))
1045	must_reinit = 1;
1046
1047	if (first_slice && av_cmp_q(sps->sar, h->avctx->sample_aspect_ratio))
1048	must_reinit = 1;
1049
1050	if (!h->setup_finished) {
1051	h->avctx->profile = ff_h264_get_profile(sps);
1052	h->avctx->level = sps->level_idc;
1053	h->avctx->refs = sps->ref_frame_count;
1054
1055	h->mb_width = sps->mb_width;
1056	h->mb_height = sps->mb_height;
1057	h->mb_num = h->mb_width * h->mb_height;
1058	h->mb_stride = h->mb_width + 1;
1059
1060	h->b_stride = h->mb_width * 4;
1061
1062	h->chroma_y_shift = sps->chroma_format_idc <= 1; // 400 uses yuv420p
1063
1064	h->width = 16 * h->mb_width;
1065	h->height = 16 * h->mb_height;
1066
1067	ret = init_dimensions(h);
1068	if (ret < 0)
1069	return ret;
1070
1071	if (sps->video_signal_type_present_flag) {
1072	h->avctx->color_range = sps->full_range > 0 ? AVCOL_RANGE_JPEG
1073	: AVCOL_RANGE_MPEG;
1074	if (sps->colour_description_present_flag) {
1075	if (h->avctx->colorspace != sps->colorspace)
1076	needs_reinit = 1;
1077	h->avctx->color_primaries = sps->color_primaries;
1078	h->avctx->color_trc = sps->color_trc;
1079	h->avctx->colorspace = sps->colorspace;
1080	}
1081	}
1082	}
1083
1084	if (!h->context_initialized || must_reinit || needs_reinit) {
1085	int flush_changes = h->context_initialized;
1086	h->context_initialized = 0;
1087	if (sl != h->slice_ctx) {
1088	av_log(h->avctx, AV_LOG_ERROR,
1089	"changing width %d -> %d / height %d -> %d on "
1090	"slice %d\n",
1091	h->width, h->avctx->coded_width,
1092	h->height, h->avctx->coded_height,
1093	h->current_slice + 1);
1094	return AVERROR_INVALIDDATA;
1095	}
1096
1097	av_assert1(first_slice);
1098
1099	if (flush_changes)
1100	ff_h264_flush_change(h);
1101
1102	if ((ret = get_pixel_format(h, 1)) < 0)
1103	return ret;
1104	h->avctx->pix_fmt = ret;
1105
1106	av_log(h->avctx, AV_LOG_VERBOSE, "Reinit context to %dx%d, "
1107	"pix_fmt: %s\n", h->width, h->height, av_get_pix_fmt_name(h->avctx->pix_fmt));
1108
1109	if ((ret = h264_slice_header_init(h)) < 0) {
1110	av_log(h->avctx, AV_LOG_ERROR,
1111	"h264_slice_header_init() failed\n");
1112	return ret;
1113	}
1114	}
1115
1116	return 0;
1117	}
1118
1119	static int h264_export_frame_props(H264Context *h)
1120	{
1121	const SPS *sps = h->ps.sps;
1122	H264Picture *cur = h->cur_pic_ptr;
1123
1124	cur->f->interlaced_frame = 0;
1125	cur->f->repeat_pict = 0;
1126
1127	/* Signal interlacing information externally. */
1128	/* Prioritize picture timing SEI information over used
1129	* decoding process if it exists. */
1130
1131	if (sps->pic_struct_present_flag && h->sei.picture_timing.present) {
1132	H264SEIPictureTiming *pt = &h->sei.picture_timing;
1133	switch (pt->pic_struct) {
1134	case SEI_PIC_STRUCT_FRAME:
1135	break;
1136	case SEI_PIC_STRUCT_TOP_FIELD:
1137	case SEI_PIC_STRUCT_BOTTOM_FIELD:
1138	cur->f->interlaced_frame = 1;
1139	break;
1140	case SEI_PIC_STRUCT_TOP_BOTTOM:
1141	case SEI_PIC_STRUCT_BOTTOM_TOP:
1142	if (FIELD_OR_MBAFF_PICTURE(h))
1143	cur->f->interlaced_frame = 1;
1144	else
1145	// try to flag soft telecine progressive
1146	cur->f->interlaced_frame = h->prev_interlaced_frame;
1147	break;
1148	case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
1149	case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
1150	/* Signal the possibility of telecined film externally
1151	* (pic_struct 5,6). From these hints, let the applications
1152	* decide if they apply deinterlacing. */
1153	cur->f->repeat_pict = 1;
1154	break;
1155	case SEI_PIC_STRUCT_FRAME_DOUBLING:
1156	cur->f->repeat_pict = 2;
1157	break;
1158	case SEI_PIC_STRUCT_FRAME_TRIPLING:
1159	cur->f->repeat_pict = 4;
1160	break;
1161	}
1162
1163	if ((pt->ct_type & 3) &&
1164	pt->pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
1165	cur->f->interlaced_frame = (pt->ct_type & (1 << 1)) != 0;
1166	} else {
1167	/* Derive interlacing flag from used decoding process. */
1168	cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
1169	}
1170	h->prev_interlaced_frame = cur->f->interlaced_frame;
1171
1172	if (cur->field_poc[0] != cur->field_poc[1]) {
1173	/* Derive top_field_first from field pocs. */
1174	cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1];
1175	} else {
1176	if (sps->pic_struct_present_flag && h->sei.picture_timing.present) {
1177	/* Use picture timing SEI information. Even if it is a
1178	* information of a past frame, better than nothing. */
1179	if (h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
1180	h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
1181	cur->f->top_field_first = 1;
1182	else
1183	cur->f->top_field_first = 0;
1184	} else if (cur->f->interlaced_frame) {
1185	/* Default to top field first when pic_struct_present_flag
1186	* is not set but interlaced frame detected */
1187	cur->f->top_field_first = 1;
1188	} else {
1189	/* Most likely progressive */
1190	cur->f->top_field_first = 0;
1191	}
1192	}
1193
1194	if (h->sei.frame_packing.present &&
1195	h->sei.frame_packing.frame_packing_arrangement_type <= 6 &&
1196	h->sei.frame_packing.content_interpretation_type > 0 &&
1197	h->sei.frame_packing.content_interpretation_type < 3) {
1198	H264SEIFramePacking *fp = &h->sei.frame_packing;
1199	AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
1200	if (stereo) {
1201	switch (fp->frame_packing_arrangement_type) {
1202	case 0:
1203	stereo->type = AV_STEREO3D_CHECKERBOARD;
1204	break;
1205	case 1:
1206	stereo->type = AV_STEREO3D_COLUMNS;
1207	break;
1208	case 2:
1209	stereo->type = AV_STEREO3D_LINES;
1210	break;
1211	case 3:
1212	if (fp->quincunx_sampling_flag)
1213	stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
1214	else
1215	stereo->type = AV_STEREO3D_SIDEBYSIDE;
1216	break;
1217	case 4:
1218	stereo->type = AV_STEREO3D_TOPBOTTOM;
1219	break;
1220	case 5:
1221	stereo->type = AV_STEREO3D_FRAMESEQUENCE;
1222	break;
1223	case 6:
1224	stereo->type = AV_STEREO3D_2D;
1225	break;
1226	}
1227
1228	if (fp->content_interpretation_type == 2)
1229	stereo->flags = AV_STEREO3D_FLAG_INVERT;
1230	}
1231	}
1232
1233	if (h->sei.display_orientation.present &&
1234	(h->sei.display_orientation.anticlockwise_rotation ||
1235	h->sei.display_orientation.hflip ||
1236	h->sei.display_orientation.vflip)) {
1237	H264SEIDisplayOrientation *o = &h->sei.display_orientation;
1238	double angle = o->anticlockwise_rotation * 360 / (double) (1 << 16);
1239	AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
1240	AV_FRAME_DATA_DISPLAYMATRIX,
1241	sizeof(int32_t) * 9);
1242	if (rotation) {
1243	av_display_rotation_set((int32_t *)rotation->data, angle);
1244	av_display_matrix_flip((int32_t *)rotation->data,
1245	o->hflip, o->vflip);
1246	}
1247	}
1248
1249	if (h->sei.afd.present) {
1250	AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD,
1251	sizeof(uint8_t));
1252
1253	if (sd) {
1254	*sd->data = h->sei.afd.active_format_description;
1255	h->sei.afd.present = 0;
1256	}
1257	}
1258
1259	if (h->sei.a53_caption.a53_caption) {
1260	H264SEIA53Caption *a53 = &h->sei.a53_caption;
1261	AVFrameSideData *sd = av_frame_new_side_data(cur->f,
1262	AV_FRAME_DATA_A53_CC,
1263	a53->a53_caption_size);
1264	if (sd)
1265	memcpy(sd->data, a53->a53_caption, a53->a53_caption_size);
1266	av_freep(&a53->a53_caption);
1267	a53->a53_caption_size = 0;
1268	h->avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
1269	}
1270
1271	return 0;
1272	}
1273
1274	static int h264_select_output_frame(H264Context *h)
1275	{
1276	const SPS *sps = h->ps.sps;
1277	H264Picture *out = h->cur_pic_ptr;
1278	H264Picture *cur = h->cur_pic_ptr;
1279	int i, pics, out_of_order, out_idx;
1280
1281	cur->mmco_reset = h->mmco_reset;
1282	h->mmco_reset = 0;
1283
1284	if (sps->bitstream_restriction_flag ||
1285	h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
1286	h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, sps->num_reorder_frames);
1287	}
1288
1289	for (i = 0; 1; i++) {
1290	if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
1291	if(i)
1292	h->last_pocs[i-1] = cur->poc;
1293	break;
1294	} else if(i) {
1295	h->last_pocs[i-1]= h->last_pocs[i];
1296	}
1297	}
1298	out_of_order = MAX_DELAYED_PIC_COUNT - i;
1299	if( cur->f->pict_type == AV_PICTURE_TYPE_B
1300	|| (h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > INT_MIN && h->last_pocs[MAX_DELAYED_PIC_COUNT-1] - h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > 2))
1301	out_of_order = FFMAX(out_of_order, 1);
1302	if (out_of_order == MAX_DELAYED_PIC_COUNT) {
1303	av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
1304	for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
1305	h->last_pocs[i] = INT_MIN;
1306	h->last_pocs[0] = cur->poc;
1307	cur->mmco_reset = 1;
1308	} else if(h->avctx->has_b_frames < out_of_order && !sps->bitstream_restriction_flag){
1309	int loglevel = h->avctx->frame_number > 1 ? AV_LOG_WARNING : AV_LOG_VERBOSE;
1310	av_log(h->avctx, loglevel, "Increasing reorder buffer to %d\n", out_of_order);
1311	h->avctx->has_b_frames = out_of_order;
1312	}
1313
1314	pics = 0;
1315	while (h->delayed_pic[pics])
1316	pics++;
1317
1318	av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
1319
1320	h->delayed_pic[pics++] = cur;
1321	if (cur->reference == 0)
1322	cur->reference = DELAYED_PIC_REF;
1323
1324	out = h->delayed_pic[0];
1325	out_idx = 0;
1326	for (i = 1; h->delayed_pic[i] &&
1327	!h->delayed_pic[i]->f->key_frame &&
1328	!h->delayed_pic[i]->mmco_reset;
1329	i++)
1330	if (h->delayed_pic[i]->poc < out->poc) {
1331	out = h->delayed_pic[i];
1332	out_idx = i;
1333	}
1334	if (h->avctx->has_b_frames == 0 &&
1335	(h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset))
1336	h->next_outputed_poc = INT_MIN;
1337	out_of_order = out->poc < h->next_outputed_poc;
1338
1339	if (out_of_order || pics > h->avctx->has_b_frames) {
1340	out->reference &= ~DELAYED_PIC_REF;
1341	for (i = out_idx; h->delayed_pic[i]; i++)
1342	h->delayed_pic[i] = h->delayed_pic[i + 1];
1343	}
1344	if (!out_of_order && pics > h->avctx->has_b_frames) {
1345	h->next_output_pic = out;
1346	if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f->key_frame || h->delayed_pic[0]->mmco_reset)) {
1347	h->next_outputed_poc = INT_MIN;
1348	} else
1349	h->next_outputed_poc = out->poc;
1350
1351	if (out->recovered) {
1352	// We have reached an recovery point and all frames after it in
1353	// display order are "recovered".
1354	h->frame_recovered |= FRAME_RECOVERED_SEI;
1355	}
1356	out->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
1357
1358	if (!out->recovered) {
1359	if (!(h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) &&
1360	!(h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL)) {
1361	h->next_output_pic = NULL;
1362	} else {
1363	out->f->flags |= AV_FRAME_FLAG_CORRUPT;
1364	}
1365	}
1366	} else {
1367	av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
1368	}
1369
1370	return 0;
1371	}
1372
1373	/* This function is called right after decoding the slice header for a first
1374	* slice in a field (or a frame). It decides whether we are decoding a new frame
1375	* or a second field in a pair and does the necessary setup.
1376	*/
1377	static int h264_field_start(H264Context *h, const H264SliceContext *sl,
1378	const H2645NAL *nal, int first_slice)
1379	{
1380	int i;
1381	const SPS *sps;
1382
1383	int last_pic_structure, last_pic_droppable, ret;
1384
1385	ret = h264_init_ps(h, sl, first_slice);
1386	if (ret < 0)
1387	return ret;
1388
1389	sps = h->ps.sps;
1390
1391	last_pic_droppable = h->droppable;
1392	last_pic_structure = h->picture_structure;
1393	h->droppable = (nal->ref_idc == 0);
1394	h->picture_structure = sl->picture_structure;
1395
1396	h->poc.frame_num = sl->frame_num;
1397	h->poc.poc_lsb = sl->poc_lsb;
1398	h->poc.delta_poc_bottom = sl->delta_poc_bottom;
1399	h->poc.delta_poc[0] = sl->delta_poc[0];
1400	h->poc.delta_poc[1] = sl->delta_poc[1];
1401
1402	/* Shorten frame num gaps so we don't have to allocate reference
1403	* frames just to throw them away */
1404	if (h->poc.frame_num != h->poc.prev_frame_num) {
1405	int unwrap_prev_frame_num = h->poc.prev_frame_num;
1406	int max_frame_num = 1 << sps->log2_max_frame_num;
1407
1408	if (unwrap_prev_frame_num > h->poc.frame_num)
1409	unwrap_prev_frame_num -= max_frame_num;
1410
1411	if ((h->poc.frame_num - unwrap_prev_frame_num) > sps->ref_frame_count) {
1412	unwrap_prev_frame_num = (h->poc.frame_num - sps->ref_frame_count) - 1;
1413	if (unwrap_prev_frame_num < 0)
1414	unwrap_prev_frame_num += max_frame_num;
1415
1416	h->poc.prev_frame_num = unwrap_prev_frame_num;
1417	}
1418	}
1419
1420	/* See if we have a decoded first field looking for a pair...
1421	* Here, we're using that to see if we should mark previously
1422	* decode frames as "finished".
1423	* We have to do that before the "dummy" in-between frame allocation,
1424	* since that can modify h->cur_pic_ptr. */
1425	if (h->first_field) {
1426	int last_field = last_pic_structure == PICT_BOTTOM_FIELD;
1427	av_assert0(h->cur_pic_ptr);
1428	av_assert0(h->cur_pic_ptr->f->buf[0]);
1429	assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
1430
1431	/* Mark old field/frame as completed */
1432	if (h->cur_pic_ptr->tf.owner[last_field] == h->avctx) {
1433	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, last_field);
1434	}
1435
1436	/* figure out if we have a complementary field pair */
1437	if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1438	/* Previous field is unmatched. Don't display it, but let it
1439	* remain for reference if marked as such. */
1440	if (last_pic_structure != PICT_FRAME) {
1441	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1442	last_pic_structure == PICT_TOP_FIELD);
1443	}
1444	} else {
1445	if (h->cur_pic_ptr->frame_num != h->poc.frame_num) {
1446	/* This and previous field were reference, but had
1447	* different frame_nums. Consider this field first in
1448	* pair. Throw away previous field except for reference
1449	* purposes. */
1450	if (last_pic_structure != PICT_FRAME) {
1451	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1452	last_pic_structure == PICT_TOP_FIELD);
1453	}
1454	} else {
1455	/* Second field in complementary pair */
1456	if (!((last_pic_structure == PICT_TOP_FIELD &&
1457	h->picture_structure == PICT_BOTTOM_FIELD) ||
1458	(last_pic_structure == PICT_BOTTOM_FIELD &&
1459	h->picture_structure == PICT_TOP_FIELD))) {
1460	av_log(h->avctx, AV_LOG_ERROR,
1461	"Invalid field mode combination %d/%d\n",
1462	last_pic_structure, h->picture_structure);
1463	h->picture_structure = last_pic_structure;
1464	h->droppable = last_pic_droppable;
1465	return AVERROR_INVALIDDATA;
1466	} else if (last_pic_droppable != h->droppable) {
1467	avpriv_request_sample(h->avctx,
1468	"Found reference and non-reference fields in the same frame, which");
1469	h->picture_structure = last_pic_structure;
1470	h->droppable = last_pic_droppable;
1471	return AVERROR_PATCHWELCOME;
1472	}
1473	}
1474	}
1475	}
1476
1477	while (h->poc.frame_num != h->poc.prev_frame_num && !h->first_field &&
1478	h->poc.frame_num != (h->poc.prev_frame_num + 1) % (1 << sps->log2_max_frame_num)) {
1479	H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1480	av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
1481	h->poc.frame_num, h->poc.prev_frame_num);
1482	if (!sps->gaps_in_frame_num_allowed_flag)
1483	for(i=0; i<FF_ARRAY_ELEMS(h->last_pocs); i++)
1484	h->last_pocs[i] = INT_MIN;
1485	ret = h264_frame_start(h);
1486	if (ret < 0) {
1487	h->first_field = 0;
1488	return ret;
1489	}
1490
1491	h->poc.prev_frame_num++;
1492	h->poc.prev_frame_num %= 1 << sps->log2_max_frame_num;
1493	h->cur_pic_ptr->frame_num = h->poc.prev_frame_num;
1494	h->cur_pic_ptr->invalid_gap = !sps->gaps_in_frame_num_allowed_flag;
1495	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
1496	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
1497
1498	h->explicit_ref_marking = 0;
1499	ret = ff_h264_execute_ref_pic_marking(h);
1500	if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1501	return ret;
1502	/* Error concealment: If a ref is missing, copy the previous ref
1503	* in its place.
1504	* FIXME: Avoiding a memcpy would be nice, but ref handling makes
1505	* many assumptions about there being no actual duplicates.
1506	* FIXME: This does not copy padding for out-of-frame motion
1507	* vectors. Given we are concealing a lost frame, this probably
1508	* is not noticeable by comparison, but it should be fixed. */
1509	if (h->short_ref_count) {
1510	if (prev &&
1511	h->short_ref[0]->f->width == prev->f->width &&
1512	h->short_ref[0]->f->height == prev->f->height &&
1513	h->short_ref[0]->f->format == prev->f->format) {
1514	ff_thread_await_progress(&prev->tf, INT_MAX, 0);
1515	if (prev->field_picture)
1516	ff_thread_await_progress(&prev->tf, INT_MAX, 1);
1517	av_image_copy(h->short_ref[0]->f->data,
1518	h->short_ref[0]->f->linesize,
1519	(const uint8_t **)prev->f->data,
1520	prev->f->linesize,
1521	prev->f->format,
1522	prev->f->width,
1523	prev->f->height);
1524	h->short_ref[0]->poc = prev->poc + 2;
1525	}
1526	h->short_ref[0]->frame_num = h->poc.prev_frame_num;
1527	}
1528	}
1529
1530	/* See if we have a decoded first field looking for a pair...
1531	* We're using that to see whether to continue decoding in that
1532	* frame, or to allocate a new one. */
1533	if (h->first_field) {
1534	av_assert0(h->cur_pic_ptr);
1535	av_assert0(h->cur_pic_ptr->f->buf[0]);
1536	assert(h->cur_pic_ptr->reference != DELAYED_PIC_REF);
1537
1538	/* figure out if we have a complementary field pair */
1539	if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1540	/* Previous field is unmatched. Don't display it, but let it
1541	* remain for reference if marked as such. */
1542	h->missing_fields ++;
1543	h->cur_pic_ptr = NULL;
1544	h->first_field = FIELD_PICTURE(h);
1545	} else {
1546	h->missing_fields = 0;
1547	if (h->cur_pic_ptr->frame_num != h->poc.frame_num) {
1548	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1549	h->picture_structure==PICT_BOTTOM_FIELD);
1550	/* This and the previous field had different frame_nums.
1551	* Consider this field first in pair. Throw away previous
1552	* one except for reference purposes. */
1553	h->first_field = 1;
1554	h->cur_pic_ptr = NULL;
1555	} else {
1556	/* Second field in complementary pair */
1557	h->first_field = 0;
1558	}
1559	}
1560	} else {
1561	/* Frame or first field in a potentially complementary pair */
1562	h->first_field = FIELD_PICTURE(h);
1563	}
1564
1565	if (!FIELD_PICTURE(h) || h->first_field) {
1566	if (h264_frame_start(h) < 0) {
1567	h->first_field = 0;
1568	return AVERROR_INVALIDDATA;
1569	}
1570	} else {
1571	int field = h->picture_structure == PICT_BOTTOM_FIELD;
1572	release_unused_pictures(h, 0);
1573	h->cur_pic_ptr->tf.owner[field] = h->avctx;
1574	}
1575	/* Some macroblocks can be accessed before they're available in case
1576	* of lost slices, MBAFF or threading. */
1577	if (FIELD_PICTURE(h)) {
1578	for(i = (h->picture_structure == PICT_BOTTOM_FIELD); i<h->mb_height; i++)
1579	memset(h->slice_table + i*h->mb_stride, -1, (h->mb_stride - (i+1==h->mb_height)) * sizeof(*h->slice_table));
1580	} else {
1581	memset(h->slice_table, -1,
1582	(h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
1583	}
1584
1585	ff_h264_init_poc(h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc,
1586	h->ps.sps, &h->poc, h->picture_structure, nal->ref_idc);
1587
1588	memcpy(h->mmco, sl->mmco, sl->nb_mmco * sizeof(*h->mmco));
1589	h->nb_mmco = sl->nb_mmco;
1590	h->explicit_ref_marking = sl->explicit_ref_marking;
1591
1592	h->picture_idr = nal->type == H264_NAL_IDR_SLICE;
1593
1594	if (h->sei.recovery_point.recovery_frame_cnt >= 0) {
1595	const int sei_recovery_frame_cnt = h->sei.recovery_point.recovery_frame_cnt;
1596
1597	if (h->poc.frame_num != sei_recovery_frame_cnt || sl->slice_type_nos != AV_PICTURE_TYPE_I)
1598	h->valid_recovery_point = 1;
1599
1600	if ( h->recovery_frame < 0
1601	|| av_mod_uintp2(h->recovery_frame - h->poc.frame_num, h->ps.sps->log2_max_frame_num) > sei_recovery_frame_cnt) {
1602	h->recovery_frame = av_mod_uintp2(h->poc.frame_num + sei_recovery_frame_cnt, h->ps.sps->log2_max_frame_num);
1603
1604	if (!h->valid_recovery_point)
1605	h->recovery_frame = h->poc.frame_num;
1606	}
1607	}
1608
1609	h->cur_pic_ptr->f->key_frame |= (nal->type == H264_NAL_IDR_SLICE);
1610
1611	if (nal->type == H264_NAL_IDR_SLICE ||
1612	(h->recovery_frame == h->poc.frame_num && nal->ref_idc)) {
1613	h->recovery_frame = -1;
1614	h->cur_pic_ptr->recovered = 1;
1615	}
1616	// If we have an IDR, all frames after it in decoded order are
1617	// "recovered".
1618	if (nal->type == H264_NAL_IDR_SLICE)
1619	h->frame_recovered |= FRAME_RECOVERED_IDR;
1620	#if 1
1621	h->cur_pic_ptr->recovered |= h->frame_recovered;
1622	#else
1623	h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
1624	#endif
1625
1626	/* Set the frame properties/side data. Only done for the second field in
1627	* field coded frames, since some SEI information is present for each field
1628	* and is merged by the SEI parsing code. */
1629	if (!FIELD_PICTURE(h) || !h->first_field || h->missing_fields > 1) {
1630	ret = h264_export_frame_props(h);
1631	if (ret < 0)
1632	return ret;
1633
1634	ret = h264_select_output_frame(h);
1635	if (ret < 0)
1636	return ret;
1637	}
1638
1639	return 0;
1640	}
1641
1642	static int h264_slice_header_parse(const H264Context *h, H264SliceContext *sl,
1643	const H2645NAL *nal)
1644	{
1645	const SPS *sps;
1646	const PPS *pps;
1647	int ret;
1648	unsigned int slice_type, tmp, i;
1649	int field_pic_flag, bottom_field_flag;
1650	int first_slice = sl == h->slice_ctx && !h->current_slice;
1651	int picture_structure;
1652
1653	if (first_slice)
1654	av_assert0(!h->setup_finished);
1655
1656	sl->first_mb_addr = get_ue_golomb_long(&sl->gb);
1657
1658	slice_type = get_ue_golomb_31(&sl->gb);
1659	if (slice_type > 9) {
1660	av_log(h->avctx, AV_LOG_ERROR,
1661	"slice type %d too large at %d\n",
1662	slice_type, sl->first_mb_addr);
1663	return AVERROR_INVALIDDATA;
1664	}
1665	if (slice_type > 4) {
1666	slice_type -= 5;
1667	sl->slice_type_fixed = 1;
1668	} else
1669	sl->slice_type_fixed = 0;
1670
1671	slice_type = ff_h264_golomb_to_pict_type[slice_type];
1672	sl->slice_type = slice_type;
1673	sl->slice_type_nos = slice_type & 3;
1674
1675	if (nal->type == H264_NAL_IDR_SLICE &&
1676	sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1677	av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1678	return AVERROR_INVALIDDATA;
1679	}
1680
1681	sl->pps_id = get_ue_golomb(&sl->gb);
1682	if (sl->pps_id >= MAX_PPS_COUNT) {
1683	av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", sl->pps_id);
1684	return AVERROR_INVALIDDATA;
1685	}
1686	if (!h->ps.pps_list[sl->pps_id]) {
1687	av_log(h->avctx, AV_LOG_ERROR,
1688	"non-existing PPS %u referenced\n",
1689	sl->pps_id);
1690	return AVERROR_INVALIDDATA;
1691	}
1692	pps = (const PPS*)h->ps.pps_list[sl->pps_id]->data;
1693
1694	if (!h->ps.sps_list[pps->sps_id]) {
1695	av_log(h->avctx, AV_LOG_ERROR,
1696	"non-existing SPS %u referenced\n", pps->sps_id);
1697	return AVERROR_INVALIDDATA;
1698	}
1699	sps = (const SPS*)h->ps.sps_list[pps->sps_id]->data;
1700
1701	sl->frame_num = get_bits(&sl->gb, sps->log2_max_frame_num);
1702	if (!first_slice) {
1703	if (h->poc.frame_num != sl->frame_num) {
1704	av_log(h->avctx, AV_LOG_ERROR, "Frame num change from %d to %d\n",
1705	h->poc.frame_num, sl->frame_num);
1706	return AVERROR_INVALIDDATA;
1707	}
1708	}
1709
1710	sl->mb_mbaff = 0;
1711
1712	if (sps->frame_mbs_only_flag) {
1713	picture_structure = PICT_FRAME;
1714	} else {
1715	if (!sps->direct_8x8_inference_flag && slice_type == AV_PICTURE_TYPE_B) {
1716	av_log(h->avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
1717	return -1;
1718	}
1719	field_pic_flag = get_bits1(&sl->gb);
1720	if (field_pic_flag) {
1721	bottom_field_flag = get_bits1(&sl->gb);
1722	picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1723	} else {
1724	picture_structure = PICT_FRAME;
1725	}
1726	}
1727	sl->picture_structure = picture_structure;
1728	sl->mb_field_decoding_flag = picture_structure != PICT_FRAME;
1729
1730	if (picture_structure == PICT_FRAME) {
1731	sl->curr_pic_num = sl->frame_num;
1732	sl->max_pic_num = 1 << sps->log2_max_frame_num;
1733	} else {
1734	sl->curr_pic_num = 2 * sl->frame_num + 1;
1735	sl->max_pic_num = 1 << (sps->log2_max_frame_num + 1);
1736	}
1737
1738	if (nal->type == H264_NAL_IDR_SLICE)
1739	get_ue_golomb_long(&sl->gb); /* idr_pic_id */
1740
1741	if (sps->poc_type == 0) {
1742	sl->poc_lsb = get_bits(&sl->gb, sps->log2_max_poc_lsb);
1743
1744	if (pps->pic_order_present == 1 && picture_structure == PICT_FRAME)
1745	sl->delta_poc_bottom = get_se_golomb(&sl->gb);
1746	}
1747
1748	if (sps->poc_type == 1 && !sps->delta_pic_order_always_zero_flag) {
1749	sl->delta_poc[0] = get_se_golomb(&sl->gb);
1750
1751	if (pps->pic_order_present == 1 && picture_structure == PICT_FRAME)
1752	sl->delta_poc[1] = get_se_golomb(&sl->gb);
1753	}
1754
1755	sl->redundant_pic_count = 0;
1756	if (pps->redundant_pic_cnt_present)
1757	sl->redundant_pic_count = get_ue_golomb(&sl->gb);
1758
1759	if (sl->slice_type_nos == AV_PICTURE_TYPE_B)
1760	sl->direct_spatial_mv_pred = get_bits1(&sl->gb);
1761
1762	ret = ff_h264_parse_ref_count(&sl->list_count, sl->ref_count,
1763	&sl->gb, pps, sl->slice_type_nos,
1764	picture_structure, h->avctx);
1765	if (ret < 0)
1766	return ret;
1767
1768	if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
1769	ret = ff_h264_decode_ref_pic_list_reordering(sl, h->avctx);
1770	if (ret < 0) {
1771	sl->ref_count[1] = sl->ref_count[0] = 0;
1772	return ret;
1773	}
1774	}
1775
1776	sl->pwt.use_weight = 0;
1777	for (i = 0; i < 2; i++) {
1778	sl->pwt.luma_weight_flag[i] = 0;
1779	sl->pwt.chroma_weight_flag[i] = 0;
1780	}
1781	if ((pps->weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
1782	(pps->weighted_bipred_idc == 1 &&
1783	sl->slice_type_nos == AV_PICTURE_TYPE_B)) {
1784	ret = ff_h264_pred_weight_table(&sl->gb, sps, sl->ref_count,
1785	sl->slice_type_nos, &sl->pwt, h->avctx);
1786	if (ret < 0)
1787	return ret;
1788	}
1789
1790	sl->explicit_ref_marking = 0;
1791	if (nal->ref_idc) {
1792	ret = ff_h264_decode_ref_pic_marking(sl, &sl->gb, nal, h->avctx);
1793	if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1794	return AVERROR_INVALIDDATA;
1795	}
1796
1797	if (sl->slice_type_nos != AV_PICTURE_TYPE_I && pps->cabac) {
1798	tmp = get_ue_golomb_31(&sl->gb);
1799	if (tmp > 2) {
1800	av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1801	return AVERROR_INVALIDDATA;
1802	}
1803	sl->cabac_init_idc = tmp;
1804	}
1805
1806	sl->last_qscale_diff = 0;
1807	tmp = pps->init_qp + get_se_golomb(&sl->gb);
1808	if (tmp > 51 + 6 * (sps->bit_depth_luma - 8)) {
1809	av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1810	return AVERROR_INVALIDDATA;
1811	}
1812	sl->qscale = tmp;
1813	sl->chroma_qp[0] = get_chroma_qp(pps, 0, sl->qscale);
1814	sl->chroma_qp[1] = get_chroma_qp(pps, 1, sl->qscale);
1815	// FIXME qscale / qp ... stuff
1816	if (sl->slice_type == AV_PICTURE_TYPE_SP)
1817	get_bits1(&sl->gb); /* sp_for_switch_flag */
1818	if (sl->slice_type == AV_PICTURE_TYPE_SP ||
1819	sl->slice_type == AV_PICTURE_TYPE_SI)
1820	get_se_golomb(&sl->gb); /* slice_qs_delta */
1821
1822	sl->deblocking_filter = 1;
1823	sl->slice_alpha_c0_offset = 0;
1824	sl->slice_beta_offset = 0;
1825	if (pps->deblocking_filter_parameters_present) {
1826	tmp = get_ue_golomb_31(&sl->gb);
1827	if (tmp > 2) {
1828	av_log(h->avctx, AV_LOG_ERROR,
1829	"deblocking_filter_idc %u out of range\n", tmp);
1830	return AVERROR_INVALIDDATA;
1831	}
1832	sl->deblocking_filter = tmp;
1833	if (sl->deblocking_filter < 2)
1834	sl->deblocking_filter ^= 1; // 1<->0
1835
1836	if (sl->deblocking_filter) {
1837	sl->slice_alpha_c0_offset = get_se_golomb(&sl->gb) * 2;
1838	sl->slice_beta_offset = get_se_golomb(&sl->gb) * 2;
1839	if (sl->slice_alpha_c0_offset > 12 ||
1840	sl->slice_alpha_c0_offset < -12 ||
1841	sl->slice_beta_offset > 12 ||
1842	sl->slice_beta_offset < -12) {
1843	av_log(h->avctx, AV_LOG_ERROR,
1844	"deblocking filter parameters %d %d out of range\n",
1845	sl->slice_alpha_c0_offset, sl->slice_beta_offset);
1846	return AVERROR_INVALIDDATA;
1847	}
1848	}
1849	}
1850
1851	return 0;
1852	}
1853
1854	/* do all the per-slice initialization needed before we can start decoding the
1855	* actual MBs */
1856	static int h264_slice_init(H264Context *h, H264SliceContext *sl,
1857	const H2645NAL *nal)
1858	{
1859	int i, j, ret = 0;
1860
1861	if (h->picture_idr && nal->type != H264_NAL_IDR_SLICE) {
1862	av_log(h->avctx, AV_LOG_ERROR, "Invalid mix of IDR and non-IDR slices\n");
1863	return AVERROR_INVALIDDATA;
1864	}
1865
1866	av_assert1(h->mb_num == h->mb_width * h->mb_height);
1867	if (sl->first_mb_addr << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
1868	sl->first_mb_addr >= h->mb_num) {
1869	av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1870	return AVERROR_INVALIDDATA;
1871	}
1872	sl->resync_mb_x = sl->mb_x = sl->first_mb_addr % h->mb_width;
1873	sl->resync_mb_y = sl->mb_y = (sl->first_mb_addr / h->mb_width) <<
1874	FIELD_OR_MBAFF_PICTURE(h);
1875	if (h->picture_structure == PICT_BOTTOM_FIELD)
1876	sl->resync_mb_y = sl->mb_y = sl->mb_y + 1;
1877	av_assert1(sl->mb_y < h->mb_height);
1878
1879	ret = ff_h264_build_ref_list(h, sl);
1880	if (ret < 0)
1881	return ret;
1882
1883	if (h->ps.pps->weighted_bipred_idc == 2 &&
1884	sl->slice_type_nos == AV_PICTURE_TYPE_B) {
1885	implicit_weight_table(h, sl, -1);
1886	if (FRAME_MBAFF(h)) {
1887	implicit_weight_table(h, sl, 0);
1888	implicit_weight_table(h, sl, 1);
1889	}
1890	}
1891
1892	if (sl->slice_type_nos == AV_PICTURE_TYPE_B && !sl->direct_spatial_mv_pred)
1893	ff_h264_direct_dist_scale_factor(h, sl);
1894	if (!h->setup_finished)
1895	ff_h264_direct_ref_list_init(h, sl);
1896
1897	if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
1898	(h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1899	h->nal_unit_type != H264_NAL_IDR_SLICE) ||
1900	(h->avctx->skip_loop_filter >= AVDISCARD_NONINTRA &&
1901	sl->slice_type_nos != AV_PICTURE_TYPE_I) ||
1902	(h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
1903	sl->slice_type_nos == AV_PICTURE_TYPE_B) ||
1904	(h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1905	nal->ref_idc == 0))
1906	sl->deblocking_filter = 0;
1907
1908	if (sl->deblocking_filter == 1 && h->nb_slice_ctx > 1) {
1909	if (h->avctx->flags2 & AV_CODEC_FLAG2_FAST) {
1910	/* Cheat slightly for speed:
1911	* Do not bother to deblock across slices. */
1912	sl->deblocking_filter = 2;
1913	} else {
1914	h->postpone_filter = 1;
1915	}
1916	}
1917	sl->qp_thresh = 15 -
1918	FFMIN(sl->slice_alpha_c0_offset, sl->slice_beta_offset) -
1919	FFMAX3(0,
1920	h->ps.pps->chroma_qp_index_offset[0],
1921	h->ps.pps->chroma_qp_index_offset[1]) +
1922	6 * (h->ps.sps->bit_depth_luma - 8);
1923
1924	sl->slice_num = ++h->current_slice;
1925
1926	if (sl->slice_num)
1927	h->slice_row[(sl->slice_num-1)&(MAX_SLICES-1)]= sl->resync_mb_y;
1928	if ( h->slice_row[sl->slice_num&(MAX_SLICES-1)] + 3 >= sl->resync_mb_y
1929	&& h->slice_row[sl->slice_num&(MAX_SLICES-1)] <= sl->resync_mb_y
1930	&& sl->slice_num >= MAX_SLICES) {
1931	//in case of ASO this check needs to be updated depending on how we decide to assign slice numbers in this case
1932	av_log(h->avctx, AV_LOG_WARNING, "Possibly too many slices (%d >= %d), increase MAX_SLICES and recompile if there are artifacts\n", sl->slice_num, MAX_SLICES);
1933	}
1934
1935	for (j = 0; j < 2; j++) {
1936	int id_list[16];
1937	int *ref2frm = h->ref2frm[sl->slice_num & (MAX_SLICES - 1)][j];
1938	for (i = 0; i < 16; i++) {
1939	id_list[i] = 60;
1940	if (j < sl->list_count && i < sl->ref_count[j] &&
1941	sl->ref_list[j][i].parent->f->buf[0]) {
1942	int k;
1943	AVBuffer *buf = sl->ref_list[j][i].parent->f->buf[0]->buffer;
1944	for (k = 0; k < h->short_ref_count; k++)
1945	if (h->short_ref[k]->f->buf[0]->buffer == buf) {
1946	id_list[i] = k;
1947	break;
1948	}
1949	for (k = 0; k < h->long_ref_count; k++)
1950	if (h->long_ref[k] && h->long_ref[k]->f->buf[0]->buffer == buf) {
1951	id_list[i] = h->short_ref_count + k;
1952	break;
1953	}
1954	}
1955	}
1956
1957	ref2frm[0] =
1958	ref2frm[1] = -1;
1959	for (i = 0; i < 16; i++)
1960	ref2frm[i + 2] = 4 * id_list[i] + (sl->ref_list[j][i].reference & 3);
1961	ref2frm[18 + 0] =
1962	ref2frm[18 + 1] = -1;
1963	for (i = 16; i < 48; i++)
1964	ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1965	(sl->ref_list[j][i].reference & 3);
1966	}
1967
1968	if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
1969	av_log(h->avctx, AV_LOG_DEBUG,
1970	"slice:%d %s mb:%d %c%s%s frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
1971	sl->slice_num,
1972	(h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
1973	sl->mb_y * h->mb_width + sl->mb_x,
1974	av_get_picture_type_char(sl->slice_type),
1975	sl->slice_type_fixed ? " fix" : "",
1976	nal->type == H264_NAL_IDR_SLICE ? " IDR" : "",
1977	h->poc.frame_num,
1978	h->cur_pic_ptr->field_poc[0],
1979	h->cur_pic_ptr->field_poc[1],
1980	sl->ref_count[0], sl->ref_count[1],
1981	sl->qscale,
1982	sl->deblocking_filter,
1983	sl->slice_alpha_c0_offset, sl->slice_beta_offset,
1984	sl->pwt.use_weight,
1985	sl->pwt.use_weight == 1 && sl->pwt.use_weight_chroma ? "c" : "",
1986	sl->slice_type == AV_PICTURE_TYPE_B ? (sl->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
1987	}
1988
1989	return 0;
1990	}
1991
1992	int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal)
1993	{
1994	H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
1995	int first_slice = sl == h->slice_ctx && !h->current_slice;
1996	int ret;
1997
1998	sl->gb = nal->gb;
1999
2000	ret = h264_slice_header_parse(h, sl, nal);
2001	if (ret < 0)
2002	return ret;
2003
2004	// discard redundant pictures
2005	if (sl->redundant_pic_count > 0) {
2006	sl->ref_count[0] = sl->ref_count[1] = 0;
2007	return 0;
2008	}
2009
2010	if (sl->first_mb_addr == 0 || !h->current_slice) {
2011	if (h->setup_finished) {
2012	av_log(h->avctx, AV_LOG_ERROR, "Too many fields\n");
2013	return AVERROR_INVALIDDATA;
2014	}
2015	}
2016
2017	if (sl->first_mb_addr == 0) { // FIXME better field boundary detection
2018	if (h->current_slice) {
2019	// this slice starts a new field
2020	// first decode any pending queued slices
2021	if (h->nb_slice_ctx_queued) {
2022	H264SliceContext tmp_ctx;
2023
2024	ret = ff_h264_execute_decode_slices(h);
2025	if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
2026	return ret;
2027
2028	memcpy(&tmp_ctx, h->slice_ctx, sizeof(tmp_ctx));
2029	memcpy(h->slice_ctx, sl, sizeof(tmp_ctx));
2030	memcpy(sl, &tmp_ctx, sizeof(tmp_ctx));
2031	sl = h->slice_ctx;
2032	}
2033
2034	if (h->cur_pic_ptr && FIELD_PICTURE(h) && h->first_field) {
2035	ret = ff_h264_field_end(h, h->slice_ctx, 1);
2036	if (ret < 0)
2037	return ret;
2038	} else if (h->cur_pic_ptr && !FIELD_PICTURE(h) && !h->first_field && h->nal_unit_type == H264_NAL_IDR_SLICE) {
2039	av_log(h, AV_LOG_WARNING, "Broken frame packetizing\n");
2040	ret = ff_h264_field_end(h, h->slice_ctx, 1);
2041	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
2042	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
2043	h->cur_pic_ptr = NULL;
2044	if (ret < 0)
2045	return ret;
2046	} else
2047	return AVERROR_INVALIDDATA;
2048	}
2049
2050	if (!h->first_field) {
2051	if (h->cur_pic_ptr && !h->droppable) {
2052	ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
2053	h->picture_structure == PICT_BOTTOM_FIELD);
2054	}
2055	h->cur_pic_ptr = NULL;
2056	}
2057	}
2058
2059	if (!h->current_slice)
2060	av_assert0(sl == h->slice_ctx);
2061
2062	if (h->current_slice == 0 && !h->first_field) {
2063	if (
2064	(h->avctx->skip_frame >= AVDISCARD_NONREF && !h->nal_ref_idc) ||
2065	(h->avctx->skip_frame >= AVDISCARD_BIDIR && sl->slice_type_nos == AV_PICTURE_TYPE_B) ||
2066	(h->avctx->skip_frame >= AVDISCARD_NONINTRA && sl->slice_type_nos != AV_PICTURE_TYPE_I) ||
2067	(h->avctx->skip_frame >= AVDISCARD_NONKEY && h->nal_unit_type != H264_NAL_IDR_SLICE && h->sei.recovery_point.recovery_frame_cnt < 0) ||
2068	h->avctx->skip_frame >= AVDISCARD_ALL) {
2069	return 0;
2070	}
2071	}
2072
2073	if (!first_slice) {
2074	const PPS *pps = (const PPS*)h->ps.pps_list[sl->pps_id]->data;
2075
2076	if (h->ps.pps->sps_id != pps->sps_id ||
2077	h->ps.pps->transform_8x8_mode != pps->transform_8x8_mode /*||
2078	(h->setup_finished && h->ps.pps != pps)*/) {
2079	av_log(h->avctx, AV_LOG_ERROR, "PPS changed between slices\n");
2080	return AVERROR_INVALIDDATA;
2081	}
2082	if (h->ps.sps != (const SPS*)h->ps.sps_list[h->ps.pps->sps_id]->data) {
2083	av_log(h->avctx, AV_LOG_ERROR,
2084	"SPS changed in the middle of the frame\n");
2085	return AVERROR_INVALIDDATA;
2086	}
2087	}
2088
2089	if (h->current_slice == 0) {
2090	ret = h264_field_start(h, sl, nal, first_slice);
2091	if (ret < 0)
2092	return ret;
2093	} else {
2094	if (h->picture_structure != sl->picture_structure ||
2095	h->droppable != (nal->ref_idc == 0)) {
2096	av_log(h->avctx, AV_LOG_ERROR,
2097	"Changing field mode (%d -> %d) between slices is not allowed\n",
2098	h->picture_structure, sl->picture_structure);
2099	return AVERROR_INVALIDDATA;
2100	} else if (!h->cur_pic_ptr) {
2101	av_log(h->avctx, AV_LOG_ERROR,
2102	"unset cur_pic_ptr on slice %d\n",
2103	h->current_slice + 1);
2104	return AVERROR_INVALIDDATA;
2105	}
2106	}
2107
2108	ret = h264_slice_init(h, sl, nal);
2109	if (ret < 0)
2110	return ret;
2111
2112	h->nb_slice_ctx_queued++;
2113
2114	return 0;
2115	}
2116
2117	int ff_h264_get_slice_type(const H264SliceContext *sl)
2118	{
2119	switch (sl->slice_type) {
2120	case AV_PICTURE_TYPE_P:
2121	return 0;
2122	case AV_PICTURE_TYPE_B:
2123	return 1;
2124	case AV_PICTURE_TYPE_I:
2125	return 2;
2126	case AV_PICTURE_TYPE_SP:
2127	return 3;
2128	case AV_PICTURE_TYPE_SI:
2129	return 4;
2130	default:
2131	return AVERROR_INVALIDDATA;
2132	}
2133	}
2134
2135	static av_always_inline void fill_filter_caches_inter(const H264Context *h,
2136	H264SliceContext *sl,
2137	int mb_type, int top_xy,
2138	int left_xy[LEFT_MBS],
2139	int top_type,
2140	int left_type[LEFT_MBS],
2141	int mb_xy, int list)
2142	{
2143	int b_stride = h->b_stride;
2144	int16_t(*mv_dst)[2] = &sl->mv_cache[list][scan8[0]];
2145	int8_t *ref_cache = &sl->ref_cache[list][scan8[0]];
2146	if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
2147	if (USES_LIST(top_type, list)) {
2148	const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
2149	const int b8_xy = 4 * top_xy + 2;
2150	const int *ref2frm = &h->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
2151	AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
2152	ref_cache[0 - 1 * 8] =
2153	ref_cache[1 - 1 * 8] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 0]];
2154	ref_cache[2 - 1 * 8] =
2155	ref_cache[3 - 1 * 8] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 1]];
2156	} else {
2157	AV_ZERO128(mv_dst - 1 * 8);
2158	AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2159	}
2160
2161	if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
2162	if (USES_LIST(left_type[LTOP], list)) {
2163	const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
2164	const int b8_xy = 4 * left_xy[LTOP] + 1;
2165	const int *ref2frm = &h->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
2166	AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
2167	AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
2168	AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
2169	AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
2170	ref_cache[-1 + 0] =
2171	ref_cache[-1 + 8] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
2172	ref_cache[-1 + 16] =
2173	ref_cache[-1 + 24] = ref2frm[h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
2174	} else {
2175	AV_ZERO32(mv_dst - 1 + 0);
2176	AV_ZERO32(mv_dst - 1 + 8);
2177	AV_ZERO32(mv_dst - 1 + 16);
2178	AV_ZERO32(mv_dst - 1 + 24);
2179	ref_cache[-1 + 0] =
2180	ref_cache[-1 + 8] =
2181	ref_cache[-1 + 16] =
2182	ref_cache[-1 + 24] = LIST_NOT_USED;
2183	}
2184	}
2185	}
2186
2187	if (!USES_LIST(mb_type, list)) {
2188	fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
2189	AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2190	AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2191	AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2192	AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2193	return;
2194	}
2195
2196	{
2197	int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
2198	const int *ref2frm = &h->ref2frm[sl->slice_num & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
2199	uint32_t ref01 = (pack16to32(ref2frm[ref[0]], ref2frm[ref[1]]) & 0x00FF00FF) * 0x0101;
2200	uint32_t ref23 = (pack16to32(ref2frm[ref[2]], ref2frm[ref[3]]) & 0x00FF00FF) * 0x0101;
2201	AV_WN32A(&ref_cache[0 * 8], ref01);
2202	AV_WN32A(&ref_cache[1 * 8], ref01);
2203	AV_WN32A(&ref_cache[2 * 8], ref23);
2204	AV_WN32A(&ref_cache[3 * 8], ref23);
2205	}
2206
2207	{
2208	int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * sl->mb_x + 4 * sl->mb_y * b_stride];
2209	AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
2210	AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
2211	AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
2212	AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
2213	}
2214	}
2215
2216	/**
2217	* @return non zero if the loop filter can be skipped
2218	*/
2219	static int fill_filter_caches(const H264Context *h, H264SliceContext *sl, int mb_type)
2220	{
2221	const int mb_xy = sl->mb_xy;
2222	int top_xy, left_xy[LEFT_MBS];
2223	int top_type, left_type[LEFT_MBS];
2224	uint8_t *nnz;
2225	uint8_t *nnz_cache;
2226
2227	top_xy = mb_xy - (h->mb_stride << MB_FIELD(sl));
2228
2229	left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
2230	if (FRAME_MBAFF(h)) {
2231	const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
2232	const int curr_mb_field_flag = IS_INTERLACED(mb_type);
2233	if (sl->mb_y & 1) {
2234	if (left_mb_field_flag != curr_mb_field_flag)
2235	left_xy[LTOP] -= h->mb_stride;
2236	} else {
2237	if (curr_mb_field_flag)
2238	top_xy += h->mb_stride &
2239	(((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
2240	if (left_mb_field_flag != curr_mb_field_flag)
2241	left_xy[LBOT] += h->mb_stride;
2242	}
2243	}
2244
2245	sl->top_mb_xy = top_xy;
2246	sl->left_mb_xy[LTOP] = left_xy[LTOP];
2247	sl->left_mb_xy[LBOT] = left_xy[LBOT];
2248	{
2249	/* For sufficiently low qp, filtering wouldn't do anything.
2250	* This is a conservative estimate: could also check beta_offset
2251	* and more accurate chroma_qp. */
2252	int qp_thresh = sl->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
2253	int qp = h->cur_pic.qscale_table[mb_xy];
2254	if (qp <= qp_thresh &&
2255	(left_xy[LTOP] < 0 ||
2256	((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
2257	(top_xy < 0 ||
2258	((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
2259	if (!FRAME_MBAFF(h))
2260	return 1;
2261	if ((left_xy[LTOP] < 0 ||
2262	((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
2263	(top_xy < h->mb_stride ||
2264	((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
2265	return 1;
2266	}
2267	}
2268
2269	top_type = h->cur_pic.mb_type[top_xy];
2270	left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
2271	left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
2272	if (sl->deblocking_filter == 2) {
2273	if (h->slice_table[top_xy] != sl->slice_num)
2274	top_type = 0;
2275	if (h->slice_table[left_xy[LBOT]] != sl->slice_num)
2276	left_type[LTOP] = left_type[LBOT] = 0;
2277	} else {
2278	if (h->slice_table[top_xy] == 0xFFFF)
2279	top_type = 0;
2280	if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
2281	left_type[LTOP] = left_type[LBOT] = 0;
2282	}
2283	sl->top_type = top_type;
2284	sl->left_type[LTOP] = left_type[LTOP];
2285	sl->left_type[LBOT] = left_type[LBOT];
2286
2287	if (IS_INTRA(mb_type))
2288	return 0;
2289
2290	fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
2291	top_type, left_type, mb_xy, 0);
2292	if (sl->list_count == 2)
2293	fill_filter_caches_inter(h, sl, mb_type, top_xy, left_xy,
2294	top_type, left_type, mb_xy, 1);
2295
2296	nnz = h->non_zero_count[mb_xy];
2297	nnz_cache = sl->non_zero_count_cache;
2298	AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
2299	AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
2300	AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
2301	AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
2302	sl->cbp = h->cbp_table[mb_xy];
2303
2304	if (top_type) {
2305	nnz = h->non_zero_count[top_xy];
2306	AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
2307	}
2308
2309	if (left_type[LTOP]) {
2310	nnz = h->non_zero_count[left_xy[LTOP]];
2311	nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
2312	nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
2313	nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
2314	nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
2315	}
2316
2317	/* CAVLC 8x8dct requires NNZ values for residual decoding that differ
2318	* from what the loop filter needs */
2319	if (!CABAC(h) && h->ps.pps->transform_8x8_mode) {
2320	if (IS_8x8DCT(top_type)) {
2321	nnz_cache[4 + 8 * 0] =
2322	nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
2323	nnz_cache[6 + 8 * 0] =
2324	nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
2325	}
2326	if (IS_8x8DCT(left_type[LTOP])) {
2327	nnz_cache[3 + 8 * 1] =
2328	nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
2329	}
2330	if (IS_8x8DCT(left_type[LBOT])) {
2331	nnz_cache[3 + 8 * 3] =
2332	nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
2333	}
2334
2335	if (IS_8x8DCT(mb_type)) {
2336	nnz_cache[scan8[0]] =
2337	nnz_cache[scan8[1]] =
2338	nnz_cache[scan8[2]] =
2339	nnz_cache[scan8[3]] = (sl->cbp & 0x1000) >> 12;
2340
2341	nnz_cache[scan8[0 + 4]] =
2342	nnz_cache[scan8[1 + 4]] =
2343	nnz_cache[scan8[2 + 4]] =
2344	nnz_cache[scan8[3 + 4]] = (sl->cbp & 0x2000) >> 12;
2345
2346	nnz_cache[scan8[0 + 8]] =
2347	nnz_cache[scan8[1 + 8]] =
2348	nnz_cache[scan8[2 + 8]] =
2349	nnz_cache[scan8[3 + 8]] = (sl->cbp & 0x4000) >> 12;
2350
2351	nnz_cache[scan8[0 + 12]] =
2352	nnz_cache[scan8[1 + 12]] =
2353	nnz_cache[scan8[2 + 12]] =
2354	nnz_cache[scan8[3 + 12]] = (sl->cbp & 0x8000) >> 12;
2355	}
2356	}
2357
2358	return 0;
2359	}
2360
2361	static void loop_filter(const H264Context *h, H264SliceContext *sl, int start_x, int end_x)
2362	{
2363	uint8_t *dest_y, *dest_cb, *dest_cr;
2364	int linesize, uvlinesize, mb_x, mb_y;
2365	const int end_mb_y = sl->mb_y + FRAME_MBAFF(h);
2366	const int old_slice_type = sl->slice_type;
2367	const int pixel_shift = h->pixel_shift;
2368	const int block_h = 16 >> h->chroma_y_shift;
2369
2370	if (h->postpone_filter)
2371	return;
2372
2373	if (sl->deblocking_filter) {
2374	for (mb_x = start_x; mb_x < end_x; mb_x++)
2375	for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
2376	int mb_xy, mb_type;
2377	mb_xy = sl->mb_xy = mb_x + mb_y * h->mb_stride;
2378	mb_type = h->cur_pic.mb_type[mb_xy];
2379
2380	if (FRAME_MBAFF(h))
2381	sl->mb_mbaff =
2382	sl->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2383
2384	sl->mb_x = mb_x;
2385	sl->mb_y = mb_y;
2386	dest_y = h->cur_pic.f->data[0] +
2387	((mb_x << pixel_shift) + mb_y * sl->linesize) * 16;
2388	dest_cb = h->cur_pic.f->data[1] +
2389	(mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2390	mb_y * sl->uvlinesize * block_h;
2391	dest_cr = h->cur_pic.f->data[2] +
2392	(mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2393	mb_y * sl->uvlinesize * block_h;
2394	// FIXME simplify above
2395
2396	if (MB_FIELD(sl)) {
2397	linesize = sl->mb_linesize = sl->linesize * 2;
2398	uvlinesize = sl->mb_uvlinesize = sl->uvlinesize * 2;
2399	if (mb_y & 1) { // FIXME move out of this function?
2400	dest_y -= sl->linesize * 15;
2401	dest_cb -= sl->uvlinesize * (block_h - 1);
2402	dest_cr -= sl->uvlinesize * (block_h - 1);
2403	}
2404	} else {
2405	linesize = sl->mb_linesize = sl->linesize;
2406	uvlinesize = sl->mb_uvlinesize = sl->uvlinesize;
2407	}
2408	backup_mb_border(h, sl, dest_y, dest_cb, dest_cr, linesize,
2409	uvlinesize, 0);
2410	if (fill_filter_caches(h, sl, mb_type))
2411	continue;
2412	sl->chroma_qp[0] = get_chroma_qp(h->ps.pps, 0, h->cur_pic.qscale_table[mb_xy]);
2413	sl->chroma_qp[1] = get_chroma_qp(h->ps.pps, 1, h->cur_pic.qscale_table[mb_xy]);
2414
2415	if (FRAME_MBAFF(h)) {
2416	ff_h264_filter_mb(h, sl, mb_x, mb_y, dest_y, dest_cb, dest_cr,
2417	linesize, uvlinesize);
2418	} else {
2419	ff_h264_filter_mb_fast(h, sl, mb_x, mb_y, dest_y, dest_cb,
2420	dest_cr, linesize, uvlinesize);
2421	}
2422	}
2423	}
2424	sl->slice_type = old_slice_type;
2425	sl->mb_x = end_x;
2426	sl->mb_y = end_mb_y - FRAME_MBAFF(h);
2427	sl->chroma_qp[0] = get_chroma_qp(h->ps.pps, 0, sl->qscale);
2428	sl->chroma_qp[1] = get_chroma_qp(h->ps.pps, 1, sl->qscale);
2429	}
2430
2431	static void predict_field_decoding_flag(const H264Context *h, H264SliceContext *sl)
2432	{
2433	const int mb_xy = sl->mb_x + sl->mb_y * h->mb_stride;
2434	int mb_type = (h->slice_table[mb_xy - 1] == sl->slice_num) ?
2435	h->cur_pic.mb_type[mb_xy - 1] :
2436	(h->slice_table[mb_xy - h->mb_stride] == sl->slice_num) ?
2437	h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2438	sl->mb_mbaff = sl->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2439	}
2440
2441	/**
2442	* Draw edges and report progress for the last MB row.
2443	*/
2444	static void decode_finish_row(const H264Context *h, H264SliceContext *sl)
2445	{
2446	int top = 16 * (sl->mb_y >> FIELD_PICTURE(h));
2447	int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
2448	int height = 16 << FRAME_MBAFF(h);
2449	int deblock_border = (16 + 4) << FRAME_MBAFF(h);
2450
2451	if (sl->deblocking_filter) {
2452	if ((top + height) >= pic_height)
2453	height += deblock_border;
2454	top -= deblock_border;
2455	}
2456
2457	if (top >= pic_height || (top + height) < 0)
2458	return;
2459
2460	height = FFMIN(height, pic_height - top);
2461	if (top < 0) {
2462	height = top + height;
2463	top = 0;
2464	}
2465
2466	ff_h264_draw_horiz_band(h, sl, top, height);
2467
2468	if (h->droppable || sl->h264->slice_ctx[0].er.error_occurred)
2469	return;
2470
2471	ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
2472	h->picture_structure == PICT_BOTTOM_FIELD);
2473	}
2474
2475	static void er_add_slice(H264SliceContext *sl,
2476	int startx, int starty,
2477	int endx, int endy, int status)
2478	{
2479	if (!sl->h264->enable_er)
2480	return;
2481
2482	if (CONFIG_ERROR_RESILIENCE) {
2483	ERContext *er = &sl->h264->slice_ctx[0].er;
2484
2485	ff_er_add_slice(er, startx, starty, endx, endy, status);
2486	}
2487	}
2488
2489	static int decode_slice(struct AVCodecContext *avctx, void *arg)
2490	{
2491	H264SliceContext *sl = arg;
2492	const H264Context *h = sl->h264;
2493	int lf_x_start = sl->mb_x;
2494	int orig_deblock = sl->deblocking_filter;
2495	int ret;
2496
2497	sl->linesize = h->cur_pic_ptr->f->linesize[0];
2498	sl->uvlinesize = h->cur_pic_ptr->f->linesize[1];
2499
2500	ret = alloc_scratch_buffers(sl, sl->linesize);
2501	if (ret < 0)
2502	return ret;
2503
2504	sl->mb_skip_run = -1;
2505
2506	av_assert0(h->block_offset[15] == (4 * ((scan8[15] - scan8[0]) & 7) << h->pixel_shift) + 4 * sl->linesize * ((scan8[15] - scan8[0]) >> 3));
2507
2508	if (h->postpone_filter)
2509	sl->deblocking_filter = 0;
2510
2511	sl->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2512	(CONFIG_GRAY && (h->flags & AV_CODEC_FLAG_GRAY));
2513
2514	if (!(h->avctx->active_thread_type & FF_THREAD_SLICE) && h->picture_structure == PICT_FRAME && h->slice_ctx[0].er.error_status_table) {
2515	const int start_i = av_clip(sl->resync_mb_x + sl->resync_mb_y * h->mb_width, 0, h->mb_num - 1);
2516	if (start_i) {
2517	int prev_status = h->slice_ctx[0].er.error_status_table[h->slice_ctx[0].er.mb_index2xy[start_i - 1]];
2518	prev_status &= ~ VP_START;
2519	if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
2520	h->slice_ctx[0].er.error_occurred = 1;
2521	}
2522	}
2523
2524	if (h->ps.pps->cabac) {
2525	/* realign */
2526	align_get_bits(&sl->gb);
2527
2528	/* init cabac */
2529	ret = ff_init_cabac_decoder(&sl->cabac,
2530	sl->gb.buffer + get_bits_count(&sl->gb) / 8,
2531	(get_bits_left(&sl->gb) + 7) / 8);
2532	if (ret < 0)
2533	return ret;
2534
2535	ff_h264_init_cabac_states(h, sl);
2536
2537	for (;;) {
2538	// START_TIMER
2539	int ret, eos;
2540	if (sl->mb_x + sl->mb_y * h->mb_width >= sl->next_slice_idx) {
2541	av_log(h->avctx, AV_LOG_ERROR, "Slice overlaps with next at %d\n",
2542	sl->next_slice_idx);
2543	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2544	sl->mb_y, ER_MB_ERROR);
2545	return AVERROR_INVALIDDATA;
2546	}
2547
2548	ret = ff_h264_decode_mb_cabac(h, sl);
2549	// STOP_TIMER("decode_mb_cabac")
2550
2551	if (ret >= 0)
2552	ff_h264_hl_decode_mb(h, sl);
2553
2554	// FIXME optimal? or let mb_decode decode 16x32 ?
2555	if (ret >= 0 && FRAME_MBAFF(h)) {
2556	sl->mb_y++;
2557
2558	ret = ff_h264_decode_mb_cabac(h, sl);
2559
2560	if (ret >= 0)
2561	ff_h264_hl_decode_mb(h, sl);
2562	sl->mb_y--;
2563	}
2564	eos = get_cabac_terminate(&sl->cabac);
2565
2566	if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2567	sl->cabac.bytestream > sl->cabac.bytestream_end + 2) {
2568	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2569	sl->mb_y, ER_MB_END);
2570	if (sl->mb_x >= lf_x_start)
2571	loop_filter(h, sl, lf_x_start, sl->mb_x + 1);
2572	goto finish;
2573	}
2574	if (sl->cabac.bytestream > sl->cabac.bytestream_end + 2 )
2575	av_log(h->avctx, AV_LOG_DEBUG, "bytestream overread %"PTRDIFF_SPECIFIER"\n", sl->cabac.bytestream_end - sl->cabac.bytestream);
2576	if (ret < 0 || sl->cabac.bytestream > sl->cabac.bytestream_end + 4) {
2577	av_log(h->avctx, AV_LOG_ERROR,
2578	"error while decoding MB %d %d, bytestream %"PTRDIFF_SPECIFIER"\n",
2579	sl->mb_x, sl->mb_y,
2580	sl->cabac.bytestream_end - sl->cabac.bytestream);
2581	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2582	sl->mb_y, ER_MB_ERROR);
2583	return AVERROR_INVALIDDATA;
2584	}
2585
2586	if (++sl->mb_x >= h->mb_width) {
2587	loop_filter(h, sl, lf_x_start, sl->mb_x);
2588	sl->mb_x = lf_x_start = 0;
2589	decode_finish_row(h, sl);
2590	++sl->mb_y;
2591	if (FIELD_OR_MBAFF_PICTURE(h)) {
2592	++sl->mb_y;
2593	if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2594	predict_field_decoding_flag(h, sl);
2595	}
2596	}
2597
2598	if (eos || sl->mb_y >= h->mb_height) {
2599	ff_tlog(h->avctx, "slice end %d %d\n",
2600	get_bits_count(&sl->gb), sl->gb.size_in_bits);
2601	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x - 1,
2602	sl->mb_y, ER_MB_END);
2603	if (sl->mb_x > lf_x_start)
2604	loop_filter(h, sl, lf_x_start, sl->mb_x);
2605	goto finish;
2606	}
2607	}
2608	} else {
2609	for (;;) {
2610	int ret;
2611
2612	if (sl->mb_x + sl->mb_y * h->mb_width >= sl->next_slice_idx) {
2613	av_log(h->avctx, AV_LOG_ERROR, "Slice overlaps with next at %d\n",
2614	sl->next_slice_idx);
2615	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2616	sl->mb_y, ER_MB_ERROR);
2617	return AVERROR_INVALIDDATA;
2618	}
2619
2620	ret = ff_h264_decode_mb_cavlc(h, sl);
2621
2622	if (ret >= 0)
2623	ff_h264_hl_decode_mb(h, sl);
2624
2625	// FIXME optimal? or let mb_decode decode 16x32 ?
2626	if (ret >= 0 && FRAME_MBAFF(h)) {
2627	sl->mb_y++;
2628	ret = ff_h264_decode_mb_cavlc(h, sl);
2629
2630	if (ret >= 0)
2631	ff_h264_hl_decode_mb(h, sl);
2632	sl->mb_y--;
2633	}
2634
2635	if (ret < 0) {
2636	av_log(h->avctx, AV_LOG_ERROR,
2637	"error while decoding MB %d %d\n", sl->mb_x, sl->mb_y);
2638	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2639	sl->mb_y, ER_MB_ERROR);
2640	return ret;
2641	}
2642
2643	if (++sl->mb_x >= h->mb_width) {
2644	loop_filter(h, sl, lf_x_start, sl->mb_x);
2645	sl->mb_x = lf_x_start = 0;
2646	decode_finish_row(h, sl);
2647	++sl->mb_y;
2648	if (FIELD_OR_MBAFF_PICTURE(h)) {
2649	++sl->mb_y;
2650	if (FRAME_MBAFF(h) && sl->mb_y < h->mb_height)
2651	predict_field_decoding_flag(h, sl);
2652	}
2653	if (sl->mb_y >= h->mb_height) {
2654	ff_tlog(h->avctx, "slice end %d %d\n",
2655	get_bits_count(&sl->gb), sl->gb.size_in_bits);
2656
2657	if ( get_bits_left(&sl->gb) == 0
2658	|| get_bits_left(&sl->gb) > 0 && !(h->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
2659	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2660	sl->mb_x - 1, sl->mb_y, ER_MB_END);
2661
2662	goto finish;
2663	} else {
2664	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2665	sl->mb_x, sl->mb_y, ER_MB_END);
2666
2667	return AVERROR_INVALIDDATA;
2668	}
2669	}
2670	}
2671
2672	if (get_bits_left(&sl->gb) <= 0 && sl->mb_skip_run <= 0) {
2673	ff_tlog(h->avctx, "slice end %d %d\n",
2674	get_bits_count(&sl->gb), sl->gb.size_in_bits);
2675
2676	if (get_bits_left(&sl->gb) == 0) {
2677	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y,
2678	sl->mb_x - 1, sl->mb_y, ER_MB_END);
2679	if (sl->mb_x > lf_x_start)
2680	loop_filter(h, sl, lf_x_start, sl->mb_x);
2681
2682	goto finish;
2683	} else {
2684	er_add_slice(sl, sl->resync_mb_x, sl->resync_mb_y, sl->mb_x,
2685	sl->mb_y, ER_MB_ERROR);
2686
2687	return AVERROR_INVALIDDATA;
2688	}
2689	}
2690	}
2691	}
2692
2693	finish:
2694	sl->deblocking_filter = orig_deblock;
2695	return 0;
2696	}
2697
2698	/**
2699	* Call decode_slice() for each context.
2700	*
2701	* @param h h264 master context
2702	*/
2703	int ff_h264_execute_decode_slices(H264Context *h)
2704	{
2705	AVCodecContext *const avctx = h->avctx;
2706	H264SliceContext *sl;
2707	int context_count = h->nb_slice_ctx_queued;
2708	int ret = 0;
2709	int i, j;
2710
2711	h->slice_ctx[0].next_slice_idx = INT_MAX;
2712
2713	if (h->avctx->hwaccel || context_count < 1
2714	#if FF_API_CAP_VDPAU
2715	|| h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU
2716	#endif
2717	)
2718	return 0;
2719
2720	av_assert0(context_count && h->slice_ctx[context_count - 1].mb_y < h->mb_height);
2721
2722	if (context_count == 1) {
2723
2724	h->slice_ctx[0].next_slice_idx = h->mb_width * h->mb_height;
2725	h->postpone_filter = 0;
2726
2727	ret = decode_slice(avctx, &h->slice_ctx[0]);
2728	h->mb_y = h->slice_ctx[0].mb_y;
2729	if (ret < 0)
2730	goto finish;
2731	} else {
2732	av_assert0(context_count > 0);
2733	for (i = 0; i < context_count; i++) {
2734	int next_slice_idx = h->mb_width * h->mb_height;
2735	int slice_idx;
2736
2737	sl = &h->slice_ctx[i];
2738	if (CONFIG_ERROR_RESILIENCE) {
2739	sl->er.error_count = 0;
2740	}
2741
2742	/* make sure none of those slices overlap */
2743	slice_idx = sl->mb_y * h->mb_width + sl->mb_x;
2744	for (j = 0; j < context_count; j++) {
2745	H264SliceContext *sl2 = &h->slice_ctx[j];
2746	int slice_idx2 = sl2->mb_y * h->mb_width + sl2->mb_x;
2747
2748	if (i == j || slice_idx2 < slice_idx)
2749	continue;
2750	next_slice_idx = FFMIN(next_slice_idx, slice_idx2);
2751	}
2752	sl->next_slice_idx = next_slice_idx;
2753	}
2754
2755	avctx->execute(avctx, decode_slice, h->slice_ctx,
2756	NULL, context_count, sizeof(h->slice_ctx[0]));
2757
2758	/* pull back stuff from slices to master context */
2759	sl = &h->slice_ctx[context_count - 1];
2760	h->mb_y = sl->mb_y;
2761	if (CONFIG_ERROR_RESILIENCE) {
2762	for (i = 1; i < context_count; i++)
2763	h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;
2764	}
2765
2766	if (h->postpone_filter) {
2767	h->postpone_filter = 0;
2768
2769	for (i = 0; i < context_count; i++) {
2770	int y_end, x_end;
2771
2772	sl = &h->slice_ctx[i];
2773	y_end = FFMIN(sl->mb_y + 1, h->mb_height);
2774	x_end = (sl->mb_y >= h->mb_height) ? h->mb_width : sl->mb_x;
2775
2776	for (j = sl->resync_mb_y; j < y_end; j += 1 + FIELD_OR_MBAFF_PICTURE(h)) {
2777	sl->mb_y = j;
2778	loop_filter(h, sl, j > sl->resync_mb_y ? 0 : sl->resync_mb_x,
2779	j == y_end - 1 ? x_end : h->mb_width);
2780	}
2781	}
2782	}
2783	}
2784
2785	finish:
2786	h->nb_slice_ctx_queued = 0;
2787	return ret;
2788	}
2789