FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/h264dec.c
Date: 2025-04-23 13:13:41
Exec Total Coverage
Lines: 463 641 72.2%
Functions: 20 23 87.0%
Branches: 258 447 57.7%
Line Branch Exec Source
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 #define UNCHECKED_BITSTREAM_READER 1
29
30 #include "config_components.h"
31
32 #include "libavutil/avassert.h"
33 #include "libavutil/emms.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/mem.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/thread.h"
38 #include "libavutil/video_enc_params.h"
39
40 #include "codec_internal.h"
41 #include "internal.h"
42 #include "error_resilience.h"
43 #include "avcodec.h"
44 #include "h264.h"
45 #include "h264dec.h"
46 #include "h2645_parse.h"
47 #include "h264data.h"
48 #include "h264_ps.h"
49 #include "golomb.h"
50 #include "hwaccel_internal.h"
51 #include "hwconfig.h"
52 #include "mpegutils.h"
53 #include "profiles.h"
54 #include "rectangle.h"
55 #include "libavutil/refstruct.h"
56 #include "thread.h"
57 #include "threadframe.h"
58
59 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
60
61 6687 int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
62 {
63 6687 H264Context *h = avctx->priv_data;
64
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 6687 return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
65 }
66
67 ✗ static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
68 int (*mv)[2][4][2],
69 int mb_x, int mb_y, int mb_intra, int mb_skipped)
70 {
71 ✗ const H264Context *h = opaque;
72 ✗ H264SliceContext *sl = &h->slice_ctx[0];
73
74 ✗ sl->mb_x = mb_x;
75 ✗ sl->mb_y = mb_y;
76 ✗ sl->mb_xy = mb_x + mb_y * h->mb_stride;
77 ✗ memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
78 av_assert1(ref >= 0);
79 /* FIXME: It is possible albeit uncommon that slice references
80 * differ between slices. We take the easy approach and ignore
81 * it for now. If this turns out to have any relevance in
82 * practice then correct remapping should be added. */
83 ✗ if (ref >= sl->ref_count[0])
84 ✗ ref = 0;
85 ✗ if (!sl->ref_list[0][ref].data[0]) {
86 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
87 ✗ ref = 0;
88 }
89 ✗ if ((sl->ref_list[0][ref].reference&3) != 3) {
90 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
91 ✗ return;
92 }
93 ✗ fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
94 2, 2, 2, ref, 1);
95 ✗ fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
96 ✗ fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
97 ✗ pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
98 ✗ sl->mb_mbaff =
99 ✗ sl->mb_field_decoding_flag = 0;
100 ✗ ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
101 }
102
103 377370 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
104 int y, int height)
105 {
106 377370 AVCodecContext *avctx = h->avctx;
107 377370 const AVFrame *src = h->cur_pic.f;
108 const AVPixFmtDescriptor *desc;
109 int offset[AV_NUM_DATA_POINTERS];
110 int vshift;
111 377370 const int field_pic = h->picture_structure != PICT_FRAME;
112
113
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 377370 if (!avctx->draw_horiz_band)
114 377370 return;
115
116 ✗ if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
117 ✗ return;
118
119 ✗ if (field_pic) {
120 ✗ height <<= 1;
121 ✗ y <<= 1;
122 }
123
124 ✗ height = FFMIN(height, avctx->height - y);
125
126 ✗ desc = av_pix_fmt_desc_get(avctx->pix_fmt);
127 ✗ vshift = desc->log2_chroma_h;
128
129 ✗ offset[0] = y * src->linesize[0];
130 ✗ offset[1] =
131 ✗ offset[2] = (y >> vshift) * src->linesize[1];
132 ✗ for (int i = 3; i < AV_NUM_DATA_POINTERS; i++)
133 ✗ offset[i] = 0;
134
135 ✗ emms_c();
136
137 ✗ avctx->draw_horiz_band(avctx, src, offset,
138 ✗ y, h->picture_structure, height);
139 }
140
141 1238 void ff_h264_free_tables(H264Context *h)
142 {
143 int i;
144
145 1238 av_freep(&h->intra4x4_pred_mode);
146 1238 av_freep(&h->chroma_pred_mode_table);
147 1238 av_freep(&h->cbp_table);
148 1238 av_freep(&h->mvd_table[0]);
149 1238 av_freep(&h->mvd_table[1]);
150 1238 av_freep(&h->direct_table);
151 1238 av_freep(&h->non_zero_count);
152 1238 av_freep(&h->slice_table_base);
153 1238 h->slice_table = NULL;
154 1238 av_freep(&h->list_counts);
155
156 1238 av_freep(&h->mb2b_xy);
157 1238 av_freep(&h->mb2br_xy);
158
159 1238 av_refstruct_pool_uninit(&h->qscale_table_pool);
160 1238 av_refstruct_pool_uninit(&h->mb_type_pool);
161 1238 av_refstruct_pool_uninit(&h->motion_val_pool);
162 1238 av_refstruct_pool_uninit(&h->ref_index_pool);
163
164 #if CONFIG_ERROR_RESILIENCE
165 1238 av_freep(&h->er.mb_index2xy);
166 1238 av_freep(&h->er.error_status_table);
167 1238 av_freep(&h->er.er_temp_buffer);
168 1238 av_freep(&h->dc_val_base);
169 #endif
170
171
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 2478 for (i = 0; i < h->nb_slice_ctx; i++) {
172 1240 H264SliceContext *sl = &h->slice_ctx[i];
173
174 1240 av_freep(&sl->bipred_scratchpad);
175 1240 av_freep(&sl->edge_emu_buffer);
176 1240 av_freep(&sl->top_borders[0]);
177 1240 av_freep(&sl->top_borders[1]);
178
179 1240 sl->bipred_scratchpad_allocated = 0;
180 1240 sl->edge_emu_buffer_allocated = 0;
181 1240 sl->top_borders_allocated[0] = 0;
182 1240 sl->top_borders_allocated[1] = 0;
183 }
184 1238 }
185
186 611 int ff_h264_alloc_tables(H264Context *h)
187 {
188 611 ERContext *const er = &h->er;
189 611 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
190 611 const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
191 611 const int st_size = big_mb_num + h->mb_stride;
192 int x, y;
193
194
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 611 if (!FF_ALLOCZ_TYPED_ARRAY(h->intra4x4_pred_mode, row_mb_num * 8) ||
195
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->non_zero_count, big_mb_num) ||
196
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->slice_table_base, st_size) ||
197
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->cbp_table, big_mb_num) ||
198
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->chroma_pred_mode_table, big_mb_num) ||
199
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[0], row_mb_num * 8) ||
200
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[1], row_mb_num * 8) ||
201
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->direct_table, big_mb_num * 4) ||
202
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->list_counts, big_mb_num) ||
203
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->mb2b_xy, big_mb_num) ||
204
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->mb2br_xy, big_mb_num))
205 ✗ return AVERROR(ENOMEM);
206 611 h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
207 611 h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
208 611 h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
209 611 memset(h->slice_table_base, -1,
210 st_size * sizeof(*h->slice_table_base));
211 611 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
212
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 16166 for (y = 0; y < h->mb_height; y++)
213
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 973831 for (x = 0; x < h->mb_width; x++) {
214 958276 const int mb_xy = x + y * h->mb_stride;
215 958276 const int b_xy = 4 * x + 4 * y * h->b_stride;
216
217 958276 h->mb2b_xy[mb_xy] = b_xy;
218 958276 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
219 }
220
221 if (CONFIG_ERROR_RESILIENCE) {
222 611 const int er_size = h->mb_height * h->mb_stride * (4*sizeof(int) + 1);
223 611 int mb_array_size = h->mb_height * h->mb_stride;
224 611 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
225 611 int yc_size = y_size + 2 * big_mb_num;
226
227 /* init ER */
228 611 er->avctx = h->avctx;
229 611 er->decode_mb = h264_er_decode_mb;
230 611 er->opaque = h;
231 611 er->quarter_sample = 1;
232
233 611 er->mb_num = h->mb_num;
234 611 er->mb_width = h->mb_width;
235 611 er->mb_height = h->mb_height;
236 611 er->mb_stride = h->mb_stride;
237 611 er->b8_stride = h->mb_width * 2 + 1;
238
239 // error resilience code looks cleaner with this
240
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 611 if (!FF_ALLOCZ_TYPED_ARRAY(er->mb_index2xy, h->mb_num + 1) ||
241
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 611 !FF_ALLOCZ_TYPED_ARRAY(er->error_status_table, mb_array_size) ||
242
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 611 !FF_ALLOCZ_TYPED_ARRAY(er->er_temp_buffer, er_size) ||
243
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 611 !FF_ALLOCZ_TYPED_ARRAY(h->dc_val_base, yc_size))
244 ✗ return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
245
246
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247
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 973831 for (x = 0; x < h->mb_width; x++)
248 958276 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
249
250 611 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
251 611 h->mb_stride + h->mb_width;
252 611 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
253 611 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
254 611 er->dc_val[2] = er->dc_val[1] + big_mb_num;
255
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 5906576 for (int i = 0; i < yc_size; i++)
256 5905965 h->dc_val_base[i] = 1024;
257 }
258
259 611 return 0;
260 }
261
262 /**
263 * Init slice context
264 */
265 612 void ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
266 {
267 612 sl->ref_cache[0][scan8[5] + 1] =
268 612 sl->ref_cache[0][scan8[7] + 1] =
269 612 sl->ref_cache[0][scan8[13] + 1] =
270 612 sl->ref_cache[1][scan8[5] + 1] =
271 612 sl->ref_cache[1][scan8[7] + 1] =
272 612 sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
273
274 612 sl->er = &h->er;
275 612 }
276
277 23598 static int h264_init_pic(H264Picture *pic)
278 {
279 23598 pic->f = av_frame_alloc();
280
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 23598 if (!pic->f)
281 ✗ return AVERROR(ENOMEM);
282
283 23598 pic->f_grain = av_frame_alloc();
284
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 23598 if (!pic->f_grain)
285 ✗ return AVERROR(ENOMEM);
286
287 23598 return 0;
288 }
289
290 621 static int h264_init_context(AVCodecContext *avctx, H264Context *h)
291 {
292 int i, ret;
293
294 621 h->avctx = avctx;
295 621 h->cur_chroma_format_idc = -1;
296
297 621 h->width_from_caller = avctx->width;
298 621 h->height_from_caller = avctx->height;
299
300 621 h->workaround_bugs = avctx->workaround_bugs;
301 621 h->flags = avctx->flags;
302 621 h->poc.prev_poc_msb = 1 << 16;
303 621 h->recovery_frame = -1;
304 621 h->frame_recovered = 0;
305 621 h->poc.prev_frame_num = -1;
306 621 h->sei.common.frame_packing.arrangement_cancel_flag = -1;
307 621 h->sei.common.unregistered.x264_build = -1;
308
309 621 h->next_outputed_poc = INT_MIN;
310
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 10557 for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
311 9936 h->last_pocs[i] = INT_MIN;
312
313 621 ff_h264_sei_uninit(&h->sei);
314
315
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 621 if (avctx->active_thread_type & FF_THREAD_FRAME) {
316 18 h->decode_error_flags_pool = av_refstruct_pool_alloc(sizeof(atomic_int), 0);
317
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 18 if (!h->decode_error_flags_pool)
318 ✗ return AVERROR(ENOMEM);
319 }
320
321
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 621 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
322 621 h->slice_ctx = av_calloc(h->nb_slice_ctx, sizeof(*h->slice_ctx));
323
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 621 if (!h->slice_ctx) {
324 ✗ h->nb_slice_ctx = 0;
325 ✗ return AVERROR(ENOMEM);
326 }
327
328
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 22977 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
329
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 22356 if ((ret = h264_init_pic(&h->DPB[i])) < 0)
330 ✗ return ret;
331 }
332
333
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 621 if ((ret = h264_init_pic(&h->cur_pic)) < 0)
334 ✗ return ret;
335
336
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 621 if ((ret = h264_init_pic(&h->last_pic_for_ec)) < 0)
337 ✗ return ret;
338
339
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 1243 for (i = 0; i < h->nb_slice_ctx; i++)
340 622 h->slice_ctx[i].h264 = h;
341
342 621 return 0;
343 }
344
345 23598 static void h264_free_pic(H264Context *h, H264Picture *pic)
346 {
347 23598 ff_h264_unref_picture(pic);
348 23598 av_frame_free(&pic->f);
349 23598 av_frame_free(&pic->f_grain);
350 23598 }
351
352 621 static av_cold int h264_decode_end(AVCodecContext *avctx)
353 {
354 621 H264Context *h = avctx->priv_data;
355 int i;
356
357 621 ff_h264_remove_all_refs(h);
358 621 ff_h264_free_tables(h);
359
360
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 22977 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
361 22356 h264_free_pic(h, &h->DPB[i]);
362 }
363 621 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
364
365 621 h->cur_pic_ptr = NULL;
366
367 621 av_refstruct_pool_uninit(&h->decode_error_flags_pool);
368
369 621 av_freep(&h->slice_ctx);
370 621 h->nb_slice_ctx = 0;
371
372 621 ff_h264_sei_uninit(&h->sei);
373 621 ff_h264_ps_uninit(&h->ps);
374
375 621 ff_h2645_packet_uninit(&h->pkt);
376
377 621 h264_free_pic(h, &h->cur_pic);
378 621 h264_free_pic(h, &h->last_pic_for_ec);
379
380 621 return 0;
381 }
382
383 static AVOnce h264_vlc_init = AV_ONCE_INIT;
384
385 621 static av_cold int h264_decode_init(AVCodecContext *avctx)
386 {
387 621 H264Context *h = avctx->priv_data;
388 int ret;
389
390 621 ret = h264_init_context(avctx, h);
391
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 621 if (ret < 0)
392 ✗ return ret;
393
394 621 ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
395
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 621 if (ret != 0) {
396 ✗ av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
397 ✗ return AVERROR_UNKNOWN;
398 }
399
400
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 621 if (!avctx->internal->is_copy) {
401
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 605 if (avctx->extradata_size > 0 && avctx->extradata) {
402 372 ret = ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
403 &h->ps, &h->is_avc, &h->nal_length_size,
404 avctx->err_recognition, avctx);
405
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 372 if (ret < 0) {
406 ✗ int explode = avctx->err_recognition & AV_EF_EXPLODE;
407 ✗ av_log(avctx, explode ? AV_LOG_ERROR: AV_LOG_WARNING,
408 "Error decoding the extradata\n");
409 ✗ if (explode) {
410 ✗ return ret;
411 }
412 ✗ ret = 0;
413 }
414 }
415 }
416
417
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 621 if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
418 ✗ h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
419 ✗ h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
420 }
421
422 621 ff_h264_flush_change(h);
423
424
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 621 if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
425 1 h->enable_er = 0;
426
427
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 621 if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
428 ✗ av_log(avctx, AV_LOG_WARNING,
429 "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
430 "Use it at your own risk\n");
431 }
432
433 621 return 0;
434 }
435
436 /**
437 * instantaneous decoder refresh.
438 */
439 1731 static void idr(H264Context *h)
440 {
441 int i;
442 1731 ff_h264_remove_all_refs(h);
443 1731 h->poc.prev_frame_num =
444 1731 h->poc.prev_frame_num_offset = 0;
445 1731 h->poc.prev_poc_msb = 1<<16;
446 1731 h->poc.prev_poc_lsb = -1;
447
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 29427 for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
448 27696 h->last_pocs[i] = INT_MIN;
449 1731 }
450
451 /* forget old pics after a seek */
452 635 void ff_h264_flush_change(H264Context *h)
453 {
454 int i, j;
455
456 635 h->next_outputed_poc = INT_MIN;
457 635 h->prev_interlaced_frame = 1;
458 635 idr(h);
459
460 635 h->poc.prev_frame_num = -1;
461
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 635 if (h->cur_pic_ptr) {
462 ✗ h->cur_pic_ptr->reference = 0;
463 ✗ for (j=i=0; h->delayed_pic[i]; i++)
464 ✗ if (h->delayed_pic[i] != h->cur_pic_ptr)
465 ✗ h->delayed_pic[j++] = h->delayed_pic[i];
466 ✗ h->delayed_pic[j] = NULL;
467 }
468 635 ff_h264_unref_picture(&h->last_pic_for_ec);
469
470 635 h->first_field = 0;
471 635 h->recovery_frame = -1;
472 635 h->frame_recovered = 0;
473 635 h->current_slice = 0;
474 635 h->mmco_reset = 1;
475 635 }
476
477 6 static void h264_decode_flush(AVCodecContext *avctx)
478 {
479 6 H264Context *h = avctx->priv_data;
480 int i;
481
482 6 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
483
484 6 ff_h264_flush_change(h);
485 6 ff_h264_sei_uninit(&h->sei);
486
487
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 222 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
488 216 ff_h264_unref_picture(&h->DPB[i]);
489 6 h->cur_pic_ptr = NULL;
490 6 ff_h264_unref_picture(&h->cur_pic);
491
492 6 h->mb_y = 0;
493 6 h->non_gray = 0;
494
495 6 ff_h264_free_tables(h);
496 6 h->context_initialized = 0;
497
498
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 6 if (FF_HW_HAS_CB(avctx, flush))
499 ✗ FF_HW_SIMPLE_CALL(avctx, flush);
500 6 }
501
502 42 static int get_last_needed_nal(H264Context *h)
503 {
504 42 int nals_needed = 0;
505 42 int slice_type = 0;
506 42 int picture_intra_only = 1;
507 42 int first_slice = 0;
508 int i, ret;
509
510
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 86 for (i = 0; i < h->pkt.nb_nals; i++) {
511 44 H2645NAL *nal = &h->pkt.nals[i];
512 GetBitContext gb;
513
514 /* packets can sometimes contain multiple PPS/SPS,
515 * e.g. two PAFF field pictures in one packet, or a demuxer
516 * which splits NALs strangely if so, when frame threading we
517 * can't start the next thread until we've read all of them */
518
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 44 switch (nal->type) {
519 ✗ case H264_NAL_SPS:
520 case H264_NAL_PPS:
521 ✗ nals_needed = i;
522 ✗ break;
523 42 case H264_NAL_DPA:
524 case H264_NAL_IDR_SLICE:
525 case H264_NAL_SLICE:
526 42 ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
527
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 42 if (ret < 0) {
528 ✗ av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
529 ✗ if (h->avctx->err_recognition & AV_EF_EXPLODE)
530 ✗ return ret;
531
532 ✗ break;
533 }
534
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 42 if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
535 ✗ !first_slice ||
536 ✗ first_slice != nal->type)
537 42 nals_needed = i;
538 42 slice_type = get_ue_golomb_31(&gb);
539
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 42 if (slice_type > 9)
540 ✗ slice_type = 0;
541
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 42 if (slice_type > 4)
542 42 slice_type -= 5;
543
544 42 slice_type = ff_h264_golomb_to_pict_type[slice_type];
545 42 picture_intra_only &= (slice_type & 3) == AV_PICTURE_TYPE_I;
546
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 42 if (!first_slice)
547 42 first_slice = nal->type;
548 }
549 }
550
551 42 h->picture_intra_only = picture_intra_only;
552
553 42 return nals_needed;
554 }
555
556 ✗ static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
557 {
558 ✗ av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
559 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
560
561 ✗ if (gm->green_metadata_type == 0) {
562 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
563
564 ✗ if (gm->period_type == 2)
565 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
566 ✗ else if (gm->period_type == 3)
567 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
568
569 ✗ av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
570 ✗ (float)gm->percent_non_zero_macroblocks/255,
571 ✗ (float)gm->percent_intra_coded_macroblocks/255,
572 ✗ (float)gm->percent_six_tap_filtering/255,
573 ✗ (float)gm->percent_alpha_point_deblocking_instance/255);
574
575 ✗ } else if (gm->green_metadata_type == 1) {
576 ✗ av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
577
578 ✗ if (gm->xsd_metric_type == 0)
579 ✗ av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
580 ✗ (float)gm->xsd_metric_value/100);
581 }
582 ✗ }
583
584 29262 static int decode_nal_units(H264Context *h, AVBufferRef *buf_ref,
585 const uint8_t *buf, int buf_size)
586 {
587 29262 AVCodecContext *const avctx = h->avctx;
588 29262 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
589 29262 int idr_cleared=0;
590 29262 int i, ret = 0;
591
592 29262 h->has_slice = 0;
593 29262 h->nal_unit_type= 0;
594
595
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 29262 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
596 28506 h->current_slice = 0;
597
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 28506 if (!h->first_field) {
598 25119 h->cur_pic_ptr = NULL;
599 25119 ff_h264_sei_uninit(&h->sei);
600 }
601 }
602
603
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 29262 if (h->nal_length_size == 4) {
604
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 3182 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
605 ✗ h->is_avc = 0;
606
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 3182 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
607 3182 h->is_avc = 1;
608 }
609
610 29262 ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->nal_length_size,
611 29262 avctx->codec_id, !!h->is_avc * H2645_FLAG_IS_NALFF);
612
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 29262 if (ret < 0) {
613 1 av_log(avctx, AV_LOG_ERROR,
614 "Error splitting the input into NAL units.\n");
615 1 return ret;
616 }
617
618
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 29261 if (avctx->active_thread_type & FF_THREAD_FRAME)
619 42 nals_needed = get_last_needed_nal(h);
620
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 29261 if (nals_needed < 0)
621 ✗ return nals_needed;
622
623
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 81126 for (i = 0; i < h->pkt.nb_nals; i++) {
624 51865 H2645NAL *nal = &h->pkt.nals[i];
625 int max_slice_ctx, err;
626
627
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 51865 if (avctx->skip_frame >= AVDISCARD_NONREF &&
628
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 928 nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
629 504 continue;
630
631 // FIXME these should stop being context-global variables
632 51361 h->nal_ref_idc = nal->ref_idc;
633 51361 h->nal_unit_type = nal->type;
634
635 51361 err = 0;
636
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 51361 switch (nal->type) {
637 2275 case H264_NAL_IDR_SLICE:
638
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 2275 if ((nal->data[1] & 0xFC) == 0x98) {
639 ✗ av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
640 ✗ h->next_outputed_poc = INT_MIN;
641 ✗ ret = -1;
642 ✗ goto end;
643 }
644
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 2275 if(!idr_cleared) {
645 1096 idr(h); // FIXME ensure we don't lose some frames if there is reordering
646 }
647 2275 idr_cleared = 1;
648 2275 h->has_recovery_point = 1;
649 37830 case H264_NAL_SLICE:
650 37830 h->has_slice = 1;
651
652
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 37830 if ((err = ff_h264_queue_decode_slice(h, nal))) {
653 167 H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
654 167 sl->ref_count[0] = sl->ref_count[1] = 0;
655 167 break;
656 }
657
658
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 37663 if (h->current_slice == 1) {
659
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 28409 if (avctx->active_thread_type & FF_THREAD_FRAME &&
660
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 42 i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
661 42 ff_thread_finish_setup(avctx);
662 42 h->setup_finished = 1;
663 }
664
665
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 28409 if (h->avctx->hwaccel &&
666 ✗ (ret = FF_HW_CALL(h->avctx, start_frame, buf_ref,
667 buf, buf_size)) < 0)
668 ✗ goto end;
669 }
670
671
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 37663 max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
672
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 37663 if (h->nb_slice_ctx_queued == max_slice_ctx) {
673
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 36833 if (h->avctx->hwaccel) {
674 ✗ ret = FF_HW_CALL(avctx, decode_slice, nal->raw_data, nal->raw_size);
675 ✗ h->nb_slice_ctx_queued = 0;
676 } else
677 36833 ret = ff_h264_execute_decode_slices(h);
678
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 36833 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
679 ✗ goto end;
680 }
681 37663 break;
682 ✗ case H264_NAL_DPA:
683 case H264_NAL_DPB:
684 case H264_NAL_DPC:
685 ✗ avpriv_request_sample(avctx, "data partitioning");
686 ✗ break;
687 2865 case H264_NAL_SEI:
688
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 2865 if (h->setup_finished) {
689 ✗ avpriv_request_sample(avctx, "Late SEI");
690 ✗ break;
691 }
692 2865 ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
693
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 2865 h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
694
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 2865 if (avctx->debug & FF_DEBUG_GREEN_MD)
695 ✗ debug_green_metadata(&h->sei.green_metadata, h->avctx);
696
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 2865 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
697 ✗ goto end;
698 2865 break;
699 1065 case H264_NAL_SPS: {
700 1065 GetBitContext tmp_gb = nal->gb;
701
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 1065 if (FF_HW_HAS_CB(avctx, decode_params)) {
702 ✗ ret = FF_HW_CALL(avctx, decode_params,
703 nal->type, nal->raw_data, nal->raw_size);
704 ✗ if (ret < 0)
705 ✗ goto end;
706 }
707
2/2
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✓ Branch 2 taken 2 times.
 1065 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
708 1065 break;
709 2 av_log(h->avctx, AV_LOG_DEBUG,
710 "SPS decoding failure, trying again with the complete NAL\n");
711 2 init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
712
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 2 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
713 2 break;
714 ✗ ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
715 ✗ break;
716 }
717 6939 case H264_NAL_PPS:
718
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 6939 if (FF_HW_HAS_CB(avctx, decode_params)) {
719 ✗ ret = FF_HW_CALL(avctx, decode_params,
720 nal->type, nal->raw_data, nal->raw_size);
721 ✗ if (ret < 0)
722 ✗ goto end;
723 }
724 6939 ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
725 nal->size_bits);
726
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 6939 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
727 ✗ goto end;
728 6939 break;
729 2662 case H264_NAL_AUD:
730 case H264_NAL_END_SEQUENCE:
731 case H264_NAL_END_STREAM:
732 case H264_NAL_FILLER_DATA:
733 case H264_NAL_SPS_EXT:
734 case H264_NAL_AUXILIARY_SLICE:
735 2662 break;
736 ✗ default:
737 ✗ av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
738 nal->type, nal->size_bits);
739 }
740
741
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 51361 if (err < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE)) {
742 ✗ av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
743 ✗ ret = err;
744 ✗ goto end;
745 }
746 }
747
748 29261 ret = ff_h264_execute_decode_slices(h);
749
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 29261 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
750 ✗ goto end;
751
752 // set decode_error_flags to allow users to detect concealed decoding errors
753
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 29261 if ((ret < 0 || h->er.error_occurred) && h->cur_pic_ptr) {
754
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 2 if (h->cur_pic_ptr->decode_error_flags) {
755 /* Frame-threading in use */
756 ✗ atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
757 /* Using atomics here is not supposed to provide syncronisation;
758 * they are merely used to allow to set decode_error from both
759 * decoding threads in case of coded slices. */
760 ✗ atomic_fetch_or_explicit(decode_error, FF_DECODE_ERROR_DECODE_SLICES,
761 memory_order_relaxed);
762 } else
763 2 h->cur_pic_ptr->f->decode_error_flags |= FF_DECODE_ERROR_DECODE_SLICES;
764 }
765
766 29261 ret = 0;
767 29261 end:
768
769 #if CONFIG_ERROR_RESILIENCE
770 /*
771 * FIXME: Error handling code does not seem to support interlaced
772 * when slices span multiple rows
773 * The ff_er_add_slice calls don't work right for bottom
774 * fields; they cause massive erroneous error concealing
775 * Error marking covers both fields (top and bottom).
776 * This causes a mismatched s->error_count
777 * and a bad error table. Further, the error count goes to
778 * INT_MAX when called for bottom field, because mb_y is
779 * past end by one (callers fault) and resync_mb_y != 0
780 * causes problems for the first MB line, too.
781 */
782
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 29261 if (!FIELD_PICTURE(h) && h->current_slice && h->enable_er) {
783
784 21269 H264SliceContext *sl = h->slice_ctx;
785
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 21269 int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
786 21269 int decode_error_flags = 0;
787
788 21269 ff_h264_set_erpic(&h->er.cur_pic, h->cur_pic_ptr);
789
790
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 21269 if (use_last_pic) {
791 513 ff_h264_set_erpic(&h->er.last_pic, &h->last_pic_for_ec);
792 513 sl->ref_list[0][0].parent = &h->last_pic_for_ec;
793 513 memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
794 513 memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
795 513 sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
796
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 20756 } else if (sl->ref_count[0]) {
797 18773 ff_h264_set_erpic(&h->er.last_pic, sl->ref_list[0][0].parent);
798 } else
799 1983 ff_h264_set_erpic(&h->er.last_pic, NULL);
800
801
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 21269 if (sl->ref_count[1])
802 18773 ff_h264_set_erpic(&h->er.next_pic, sl->ref_list[1][0].parent);
803
804 21269 ff_er_frame_end(&h->er, &decode_error_flags);
805
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 21269 if (decode_error_flags) {
806
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 1 if (h->cur_pic_ptr->decode_error_flags) {
807 ✗ atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
808 ✗ atomic_fetch_or_explicit(decode_error, decode_error_flags,
809 memory_order_relaxed);
810 } else
811 1 h->cur_pic_ptr->f->decode_error_flags |= decode_error_flags;
812 }
813
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 21269 if (use_last_pic)
814 513 memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
815 }
816 #endif /* CONFIG_ERROR_RESILIENCE */
817 /* clean up */
818
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 29261 if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
819 18980 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
820 18980 h->picture_structure == PICT_BOTTOM_FIELD);
821 }
822
823
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 29261 return (ret < 0) ? ret : buf_size;
824 }
825
826 1 static int h264_export_enc_params(AVFrame *f, const H264Picture *p)
827 {
828 AVVideoEncParams *par;
829 1 unsigned int nb_mb = p->mb_height * p->mb_width;
830 unsigned int x, y;
831
832 1 par = av_video_enc_params_create_side_data(f, AV_VIDEO_ENC_PARAMS_H264, nb_mb);
833
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 1 if (!par)
834 ✗ return AVERROR(ENOMEM);
835
836 1 par->qp = p->pps->init_qp;
837
838 1 par->delta_qp[1][0] = p->pps->chroma_qp_index_offset[0];
839 1 par->delta_qp[1][1] = p->pps->chroma_qp_index_offset[0];
840 1 par->delta_qp[2][0] = p->pps->chroma_qp_index_offset[1];
841 1 par->delta_qp[2][1] = p->pps->chroma_qp_index_offset[1];
842
843
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 19 for (y = 0; y < p->mb_height; y++)
844
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 414 for (x = 0; x < p->mb_width; x++) {
845 396 const unsigned int block_idx = y * p->mb_width + x;
846 396 const unsigned int mb_xy = y * p->mb_stride + x;
847 396 AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx);
848
849 396 b->src_x = x * 16;
850 396 b->src_y = y * 16;
851 396 b->w = 16;
852 396 b->h = 16;
853
854 396 b->delta_qp = p->qscale_table[mb_xy] - par->qp;
855 }
856
857 1 return 0;
858 }
859
860 24367 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
861 {
862 int ret;
863
864
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 24367 ret = av_frame_ref(dst, srcp->needs_fg ? srcp->f_grain : srcp->f);
865
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 24367 if (ret < 0)
866 ✗ return ret;
867
868
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 24367 if (srcp->needs_fg && (ret = av_frame_copy_props(dst, srcp->f)) < 0)
869 ✗ return ret;
870
871
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 24367 if (srcp->decode_error_flags) {
872 42 atomic_int *decode_error = srcp->decode_error_flags;
873 /* The following is not supposed to provide synchronisation at all:
874 * given that srcp has already finished decoding, decode_error
875 * has already been set to its final value. */
876 42 dst->decode_error_flags |= atomic_load_explicit(decode_error, memory_order_relaxed);
877 }
878
879 24367 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.common.frame_packing), 0);
880
881
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 24367 if (srcp->sei_recovery_frame_cnt == 0)
882 34 dst->flags |= AV_FRAME_FLAG_KEY;
883
884
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 24367 if (h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS) {
885 1 ret = h264_export_enc_params(dst, srcp);
886
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 1 if (ret < 0)
887 ✗ goto fail;
888 }
889
890
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 24367 if (!(h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN))
891 24367 av_frame_remove_side_data(dst, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
892
893 24367 return 0;
894 ✗ fail:
895 ✗ av_frame_unref(dst);
896 ✗ return ret;
897 }
898
899 ✗ static int is_avcc_extradata(const uint8_t *buf, int buf_size)
900 {
901 ✗ int cnt= buf[5]&0x1f;
902 ✗ const uint8_t *p= buf+6;
903 ✗ if (!cnt)
904 ✗ return 0;
905 ✗ while(cnt--){
906 ✗ int nalsize= AV_RB16(p) + 2;
907 ✗ if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
908 ✗ return 0;
909 ✗ p += nalsize;
910 }
911 ✗ cnt = *(p++);
912 ✗ if(!cnt)
913 ✗ return 0;
914 ✗ while(cnt--){
915 ✗ int nalsize= AV_RB16(p) + 2;
916 ✗ if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
917 ✗ return 0;
918 ✗ p += nalsize;
919 }
920 ✗ return 1;
921 }
922
923 24367 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
924 {
925 int ret;
926
927
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 24367 if (((h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
928
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 24367 (h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
929
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 24367 out->recovered)) {
930
931
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 24367 if (h->skip_gray > 0 &&
932 ✗ h->non_gray && out->gray &&
933 ✗ !(h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL)
934 )
935 ✗ return 0;
936
937
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 24367 if (!h->avctx->hwaccel &&
938
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 24367 (out->field_poc[0] == INT_MAX ||
939
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 24367 out->field_poc[1] == INT_MAX)
940 ) {
941 int p;
942 ✗ AVFrame *f = out->f;
943 ✗ int field = out->field_poc[0] == INT_MAX;
944 uint8_t *dst_data[4];
945 int linesizes[4];
946 const uint8_t *src_data[4];
947
948 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
949
950 ✗ for (p = 0; p<4; p++) {
951 ✗ dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
952 ✗ src_data[p] = f->data[p] + field *f->linesize[p];
953 ✗ linesizes[p] = 2*f->linesize[p];
954 }
955
956 ✗ av_image_copy(dst_data, linesizes, src_data, linesizes,
957 ✗ f->format, f->width, f->height>>1);
958 }
959
960 24367 ret = output_frame(h, dst, out);
961
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 24367 if (ret < 0)
962 ✗ return ret;
963
964 24367 *got_frame = 1;
965
966 if (CONFIG_MPEGVIDEODEC) {
967 24367 ff_print_debug_info2(h->avctx, dst,
968 24367 out->mb_type,
969 24367 out->qscale_table,
970 24367 out->motion_val,
971 out->mb_width, out->mb_height, out->mb_stride, 1);
972 }
973 }
974
975 24367 return 0;
976 }
977
978 562 static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame,
979 int *got_frame, int buf_index)
980 {
981 int ret, i, out_idx;
982 H264Picture *out;
983
984 562 h->cur_pic_ptr = NULL;
985 562 h->first_field = 0;
986
987
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 1124 while (h->delayed_pic[0]) {
988 280 out = h->delayed_pic[0];
989 280 out_idx = 0;
990 280 for (i = 1;
991 1335 h->delayed_pic[i] &&
992
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 804 !(h->delayed_pic[i]->f->flags & AV_FRAME_FLAG_KEY) &&
993
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 524 !h->delayed_pic[i]->mmco_reset;
994 524 i++)
995
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 524 if (h->delayed_pic[i]->poc < out->poc) {
996 106 out = h->delayed_pic[i];
997 106 out_idx = i;
998 }
999
1000
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 1042 for (i = out_idx; h->delayed_pic[i]; i++)
1001 762 h->delayed_pic[i] = h->delayed_pic[i + 1];
1002
1003
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 280 if (out) {
1004 280 h->frame_recovered |= out->recovered;
1005 280 out->recovered |= h->frame_recovered & FRAME_RECOVERED_SEI;
1006
1007 280 out->reference &= ~DELAYED_PIC_REF;
1008 280 ret = finalize_frame(h, dst_frame, out, got_frame);
1009
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 280 if (ret < 0)
1010 ✗ return ret;
1011
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 280 if (*got_frame)
1012 280 break;
1013 }
1014 }
1015
1016 562 return buf_index;
1017 }
1018
1019 29824 static int h264_decode_frame(AVCodecContext *avctx, AVFrame *pict,
1020 int *got_frame, AVPacket *avpkt)
1021 {
1022 29824 const uint8_t *buf = avpkt->data;
1023 29824 int buf_size = avpkt->size;
1024 29824 H264Context *h = avctx->priv_data;
1025 int buf_index;
1026 int ret;
1027
1028 29824 h->flags = avctx->flags;
1029 29824 h->setup_finished = 0;
1030 29824 h->nb_slice_ctx_queued = 0;
1031
1032 29824 ff_h264_unref_picture(&h->last_pic_for_ec);
1033
1034 /* end of stream, output what is still in the buffers */
1035
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 29824 if (buf_size == 0)
1036 562 return send_next_delayed_frame(h, pict, got_frame, 0);
1037
1038
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 29262 if (av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1039 size_t side_size;
1040 7 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1041 7 ff_h264_decode_extradata(side, side_size,
1042 &h->ps, &h->is_avc, &h->nal_length_size,
1043 avctx->err_recognition, avctx);
1044 }
1045
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 29262 if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
1046 ✗ if (is_avcc_extradata(buf, buf_size))
1047 ✗ return ff_h264_decode_extradata(buf, buf_size,
1048 &h->ps, &h->is_avc, &h->nal_length_size,
1049 avctx->err_recognition, avctx);
1050 }
1051
1052 29262 buf_index = decode_nal_units(h, avpkt->buf, buf, buf_size);
1053
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 29262 if (buf_index < 0)
1054 1 return AVERROR_INVALIDDATA;
1055
1056
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 29261 if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
1057 ✗ av_assert0(buf_index <= buf_size);
1058 ✗ return send_next_delayed_frame(h, pict, got_frame, buf_index);
1059 }
1060
1061
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 29261 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1062
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 590 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1063
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 390 buf_size >= 4 && !memcmp("Q264", buf, 4))
1064 200 return buf_size;
1065 390 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1066 390 return AVERROR_INVALIDDATA;
1067 }
1068
1069
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 28671 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1070
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 756 (h->mb_y >= h->mb_height && h->mb_height)) {
1071
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 28215 if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1072 ✗ return ret;
1073
1074 /* Wait for second field. */
1075
2/2
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 28215 if (h->next_output_pic) {
1076 24087 ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1077
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 24087 if (ret < 0)
1078 ✗ return ret;
1079 }
1080 }
1081
1082
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 28671 av_assert0(pict->buf[0] || !*got_frame);
1083
1084 28671 ff_h264_unref_picture(&h->last_pic_for_ec);
1085
1086 28671 return buf_size;
1087 }
1088
1089 #define OFFSET(x) offsetof(H264Context, x)
1090 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1091 #define VDX VD | AV_OPT_FLAG_EXPORT
1092 static const AVOption h264_options[] = {
1093 { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VDX },
1094 { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, VDX },
1095 { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1096 { "x264_build", "Assume this x264 version if no x264 version found in any SEI", OFFSET(x264_build), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VD },
1097 { "skip_gray", "Do not return gray gap frames", OFFSET(skip_gray), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VD },
1098 { "noref_gray", "Avoid using gray gap frames as references", OFFSET(noref_gray), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, VD },
1099 { NULL },
1100 };
1101
1102 static const AVClass h264_class = {
1103 .class_name = "H264 Decoder",
1104 .item_name = av_default_item_name,
1105 .option = h264_options,
1106 .version = LIBAVUTIL_VERSION_INT,
1107 };
1108
1109 const FFCodec ff_h264_decoder = {
1110 .p.name = "h264",
1111 CODEC_LONG_NAME("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1112 .p.type = AVMEDIA_TYPE_VIDEO,
1113 .p.id = AV_CODEC_ID_H264,
1114 .priv_data_size = sizeof(H264Context),
1115 .init = h264_decode_init,
1116 .close = h264_decode_end,
1117 FF_CODEC_DECODE_CB(h264_decode_frame),
1118 .p.capabilities = AV_CODEC_CAP_DR1 |
1119 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1120 AV_CODEC_CAP_FRAME_THREADS,
1121 .hw_configs = (const AVCodecHWConfigInternal *const []) {
1122 #if CONFIG_H264_DXVA2_HWACCEL
1123 HWACCEL_DXVA2(h264),
1124 #endif
1125 #if CONFIG_H264_D3D11VA_HWACCEL
1126 HWACCEL_D3D11VA(h264),
1127 #endif
1128 #if CONFIG_H264_D3D11VA2_HWACCEL
1129 HWACCEL_D3D11VA2(h264),
1130 #endif
1131 #if CONFIG_H264_D3D12VA_HWACCEL
1132 HWACCEL_D3D12VA(h264),
1133 #endif
1134 #if CONFIG_H264_NVDEC_HWACCEL
1135 HWACCEL_NVDEC(h264),
1136 #endif
1137 #if CONFIG_H264_VAAPI_HWACCEL
1138 HWACCEL_VAAPI(h264),
1139 #endif
1140 #if CONFIG_H264_VDPAU_HWACCEL
1141 HWACCEL_VDPAU(h264),
1142 #endif
1143 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1144 HWACCEL_VIDEOTOOLBOX(h264),
1145 #endif
1146 #if CONFIG_H264_VULKAN_HWACCEL
1147 HWACCEL_VULKAN(h264),
1148 #endif
1149 NULL
1150 },
1151 .caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING |
1152 FF_CODEC_CAP_INIT_CLEANUP,
1153 .flush = h264_decode_flush,
1154 UPDATE_THREAD_CONTEXT(ff_h264_update_thread_context),
1155 UPDATE_THREAD_CONTEXT_FOR_USER(ff_h264_update_thread_context_for_user),
1156 .p.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
1157 .p.priv_class = &h264_class,
1158 };
1159