FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/h264dec.c
Date: 2026-01-23 19:11:46
Exec Total Coverage
Lines: 463 641 72.2%
Functions: 20 23 87.0%
Branches: 257 447 57.5%
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/attributes.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/emms.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/mem.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/thread.h"
39 #include "libavutil/video_enc_params.h"
40
41 #include "codec_internal.h"
42 #include "internal.h"
43 #include "error_resilience.h"
44 #include "avcodec.h"
45 #include "h264.h"
46 #include "h264dec.h"
47 #include "h2645_parse.h"
48 #include "h264data.h"
49 #include "h264_ps.h"
50 #include "golomb.h"
51 #include "hwaccel_internal.h"
52 #include "hwconfig.h"
53 #include "mpegutils.h"
54 #include "profiles.h"
55 #include "rectangle.h"
56 #include "libavutil/refstruct.h"
57 #include "thread.h"
58 #include "threadframe.h"
59
60 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
61
62 6610 int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
63 {
64 6610 H264Context *h = avctx->priv_data;
65
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 6610 return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
66 }
67
68 ✗ static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
69 int (*mv)[2][4][2],
70 int mb_x, int mb_y, int mb_intra, int mb_skipped)
71 {
72 ✗ const H264Context *h = opaque;
73 ✗ H264SliceContext *sl = &h->slice_ctx[0];
74
75 ✗ sl->mb_x = mb_x;
76 ✗ sl->mb_y = mb_y;
77 ✗ sl->mb_xy = mb_x + mb_y * h->mb_stride;
78 ✗ memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
79 av_assert1(ref >= 0);
80 /* FIXME: It is possible albeit uncommon that slice references
81 * differ between slices. We take the easy approach and ignore
82 * it for now. If this turns out to have any relevance in
83 * practice then correct remapping should be added. */
84 ✗ if (ref >= sl->ref_count[0])
85 ✗ ref = 0;
86 ✗ if (!sl->ref_list[0][ref].data[0]) {
87 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
88 ✗ ref = 0;
89 }
90 ✗ if ((sl->ref_list[0][ref].reference&3) != 3) {
91 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
92 ✗ return;
93 }
94 ✗ fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
95 2, 2, 2, ref, 1);
96 ✗ fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
97 ✗ fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
98 ✗ pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
99 ✗ sl->mb_mbaff =
100 ✗ sl->mb_field_decoding_flag = 0;
101 ✗ ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
102 }
103
104 383874 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
105 int y, int height)
106 {
107 383874 AVCodecContext *avctx = h->avctx;
108 383874 const AVFrame *src = h->cur_pic.f;
109 const AVPixFmtDescriptor *desc;
110 int offset[AV_NUM_DATA_POINTERS];
111 int vshift;
112 383874 const int field_pic = h->picture_structure != PICT_FRAME;
113
114
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 383874 if (!avctx->draw_horiz_band)
115 383874 return;
116
117 ✗ if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
118 ✗ return;
119
120 ✗ if (field_pic) {
121 ✗ height <<= 1;
122 ✗ y <<= 1;
123 }
124
125 ✗ height = FFMIN(height, avctx->height - y);
126
127 ✗ desc = av_pix_fmt_desc_get(avctx->pix_fmt);
128 ✗ vshift = desc->log2_chroma_h;
129
130 ✗ offset[0] = y * src->linesize[0];
131 ✗ offset[1] =
132 ✗ offset[2] = (y >> vshift) * src->linesize[1];
133 ✗ for (int i = 3; i < AV_NUM_DATA_POINTERS; i++)
134 ✗ offset[i] = 0;
135
136 ✗ emms_c();
137
138 ✗ avctx->draw_horiz_band(avctx, src, offset,
139 ✗ y, h->picture_structure, height);
140 }
141
142 1251 void ff_h264_free_tables(H264Context *h)
143 {
144 int i;
145
146 1251 av_freep(&h->intra4x4_pred_mode);
147 1251 av_freep(&h->chroma_pred_mode_table);
148 1251 av_freep(&h->cbp_table);
149 1251 av_freep(&h->mvd_table[0]);
150 1251 av_freep(&h->mvd_table[1]);
151 1251 av_freep(&h->direct_table);
152 1251 av_freep(&h->non_zero_count);
153 1251 av_freep(&h->slice_table_base);
154 1251 h->slice_table = NULL;
155 1251 av_freep(&h->list_counts);
156
157 1251 av_freep(&h->mb2b_xy);
158 1251 av_freep(&h->mb2br_xy);
159
160 1251 av_refstruct_pool_uninit(&h->qscale_table_pool);
161 1251 av_refstruct_pool_uninit(&h->mb_type_pool);
162 1251 av_refstruct_pool_uninit(&h->motion_val_pool);
163 1251 av_refstruct_pool_uninit(&h->ref_index_pool);
164
165 #if CONFIG_ERROR_RESILIENCE
166 1251 av_freep(&h->er.mb_index2xy);
167 1251 av_freep(&h->er.error_status_table);
168 1251 av_freep(&h->er.er_temp_buffer);
169 1251 av_freep(&h->dc_val_base);
170 #endif
171
172
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 2504 for (i = 0; i < h->nb_slice_ctx; i++) {
173 1253 H264SliceContext *sl = &h->slice_ctx[i];
174
175 1253 av_freep(&sl->bipred_scratchpad);
176 1253 av_freep(&sl->edge_emu_buffer);
177 1253 av_freep(&sl->top_borders[0]);
178 1253 av_freep(&sl->top_borders[1]);
179
180 1253 sl->bipred_scratchpad_allocated = 0;
181 1253 sl->edge_emu_buffer_allocated = 0;
182 1253 sl->top_borders_allocated[0] = 0;
183 1253 sl->top_borders_allocated[1] = 0;
184 }
185 1251 }
186
187 617 int ff_h264_alloc_tables(H264Context *h)
188 {
189 617 ERContext *const er = &h->er;
190 617 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
191 617 const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
192 617 const int st_size = big_mb_num + h->mb_stride;
193 int x, y;
194
195
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 617 if (!FF_ALLOCZ_TYPED_ARRAY(h->intra4x4_pred_mode, row_mb_num * 8) ||
196
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->non_zero_count, big_mb_num) ||
197
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->slice_table_base, st_size) ||
198
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->cbp_table, big_mb_num) ||
199
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->chroma_pred_mode_table, big_mb_num) ||
200
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[0], row_mb_num * 8) ||
201
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[1], row_mb_num * 8) ||
202
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->direct_table, big_mb_num * 4) ||
203
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->list_counts, big_mb_num) ||
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->mb2b_xy, big_mb_num) ||
205
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->mb2br_xy, big_mb_num))
206 ✗ return AVERROR(ENOMEM);
207 617 h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
208 617 h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
209 617 h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
210 617 memset(h->slice_table_base, -1,
211 st_size * sizeof(*h->slice_table_base));
212 617 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
213
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 16256 for (y = 0; y < h->mb_height; y++)
214
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 976035 for (x = 0; x < h->mb_width; x++) {
215 960396 const int mb_xy = x + y * h->mb_stride;
216 960396 const int b_xy = 4 * x + 4 * y * h->b_stride;
217
218 960396 h->mb2b_xy[mb_xy] = b_xy;
219 960396 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
220 }
221
222 if (CONFIG_ERROR_RESILIENCE) {
223 617 const int er_size = h->mb_height * h->mb_stride * (4*sizeof(int) + 1);
224 617 int mb_array_size = h->mb_height * h->mb_stride;
225 617 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
226 617 int yc_size = y_size + 2 * big_mb_num;
227
228 /* init ER */
229 617 er->avctx = h->avctx;
230 617 er->decode_mb = h264_er_decode_mb;
231 617 er->opaque = h;
232 617 er->quarter_sample = 1;
233
234 617 er->mb_num = h->mb_num;
235 617 er->mb_width = h->mb_width;
236 617 er->mb_height = h->mb_height;
237 617 er->mb_stride = h->mb_stride;
238 617 er->b8_stride = h->mb_width * 2 + 1;
239
240 // error resilience code looks cleaner with this
241
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 617 if (!FF_ALLOCZ_TYPED_ARRAY(er->mb_index2xy, h->mb_num + 1) ||
242
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 617 !FF_ALLOCZ_TYPED_ARRAY(er->error_status_table, mb_array_size) ||
243
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 617 !FF_ALLOCZ_TYPED_ARRAY(er->er_temp_buffer, er_size) ||
244
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 617 !FF_ALLOCZ_TYPED_ARRAY(h->dc_val_base, yc_size))
245 ✗ return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
246
247
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248
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 976035 for (x = 0; x < h->mb_width; x++)
249 960396 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
250
251 617 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
252 617 h->mb_stride + h->mb_width;
253 617 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
254 617 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
255 617 er->dc_val[2] = er->dc_val[1] + big_mb_num;
256
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 5920136 for (int i = 0; i < yc_size; i++)
257 5919519 h->dc_val_base[i] = 1024;
258 }
259
260 617 return 0;
261 }
262
263 /**
264 * Init slice context
265 */
266 618 void ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
267 {
268 618 sl->ref_cache[0][scan8[5] + 1] =
269 618 sl->ref_cache[0][scan8[7] + 1] =
270 618 sl->ref_cache[0][scan8[13] + 1] =
271 618 sl->ref_cache[1][scan8[5] + 1] =
272 618 sl->ref_cache[1][scan8[7] + 1] =
273 618 sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
274
275 618 sl->er = &h->er;
276 618 }
277
278 23864 static int h264_init_pic(H264Picture *pic)
279 {
280 23864 pic->f = av_frame_alloc();
281
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 23864 if (!pic->f)
282 ✗ return AVERROR(ENOMEM);
283
284 23864 pic->f_grain = av_frame_alloc();
285
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 23864 if (!pic->f_grain)
286 ✗ return AVERROR(ENOMEM);
287
288 23864 return 0;
289 }
290
291 628 static int h264_init_context(AVCodecContext *avctx, H264Context *h)
292 {
293 int i, ret;
294
295 628 h->avctx = avctx;
296 628 h->cur_chroma_format_idc = -1;
297
298 628 h->width_from_caller = avctx->width;
299 628 h->height_from_caller = avctx->height;
300
301 628 h->workaround_bugs = avctx->workaround_bugs;
302 628 h->flags = avctx->flags;
303 628 h->poc.prev_poc_msb = 1 << 16;
304 628 h->recovery_frame = -1;
305 628 h->frame_recovered = 0;
306 628 h->poc.prev_frame_num = -1;
307 628 h->sei.common.frame_packing.arrangement_cancel_flag = -1;
308 628 h->sei.common.unregistered.x264_build = -1;
309
310 628 h->next_outputed_poc = INT_MIN;
311
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 10676 for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
312 10048 h->last_pocs[i] = INT_MIN;
313
314 628 ff_h264_sei_uninit(&h->sei);
315
316
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 628 if (avctx->active_thread_type & FF_THREAD_FRAME) {
317 18 h->decode_error_flags_pool = av_refstruct_pool_alloc(sizeof(atomic_int), 0);
318
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 18 if (!h->decode_error_flags_pool)
319 ✗ return AVERROR(ENOMEM);
320 }
321
322
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 628 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
323 628 h->slice_ctx = av_calloc(h->nb_slice_ctx, sizeof(*h->slice_ctx));
324
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 628 if (!h->slice_ctx) {
325 ✗ h->nb_slice_ctx = 0;
326 ✗ return AVERROR(ENOMEM);
327 }
328
329
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 23236 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
330
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 22608 if ((ret = h264_init_pic(&h->DPB[i])) < 0)
331 ✗ return ret;
332 }
333
334
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 628 if ((ret = h264_init_pic(&h->cur_pic)) < 0)
335 ✗ return ret;
336
337
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 628 if ((ret = h264_init_pic(&h->last_pic_for_ec)) < 0)
338 ✗ return ret;
339
340
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 1257 for (i = 0; i < h->nb_slice_ctx; i++)
341 629 h->slice_ctx[i].h264 = h;
342
343 628 return 0;
344 }
345
346 23864 static void h264_free_pic(H264Context *h, H264Picture *pic)
347 {
348 23864 ff_h264_unref_picture(pic);
349 23864 av_frame_free(&pic->f);
350 23864 av_frame_free(&pic->f_grain);
351 23864 }
352
353 628 static av_cold int h264_decode_end(AVCodecContext *avctx)
354 {
355 628 H264Context *h = avctx->priv_data;
356 int i;
357
358 628 ff_h264_remove_all_refs(h);
359 628 ff_h264_free_tables(h);
360
361
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 23236 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
362 22608 h264_free_pic(h, &h->DPB[i]);
363 }
364 628 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
365
366 628 h->cur_pic_ptr = NULL;
367
368 628 av_refstruct_pool_uninit(&h->decode_error_flags_pool);
369
370 628 av_freep(&h->slice_ctx);
371 628 h->nb_slice_ctx = 0;
372
373 628 ff_h264_sei_uninit(&h->sei);
374 628 ff_h264_ps_uninit(&h->ps);
375
376 628 ff_h2645_packet_uninit(&h->pkt);
377
378 628 h264_free_pic(h, &h->cur_pic);
379 628 h264_free_pic(h, &h->last_pic_for_ec);
380
381 628 return 0;
382 }
383
384 static AVOnce h264_vlc_init = AV_ONCE_INIT;
385
386 628 static av_cold int h264_decode_init(AVCodecContext *avctx)
387 {
388 628 H264Context *h = avctx->priv_data;
389 int ret;
390
391 628 ret = h264_init_context(avctx, h);
392
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 628 if (ret < 0)
393 ✗ return ret;
394
395 628 ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
396
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 628 if (ret != 0) {
397 ✗ av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
398 ✗ return AVERROR_UNKNOWN;
399 }
400
401
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 628 if (!avctx->internal->is_copy) {
402
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 612 if (avctx->extradata_size > 0 && avctx->extradata) {
403 378 ret = ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
404 &h->ps, &h->is_avc, &h->nal_length_size,
405 avctx->err_recognition, avctx);
406
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 378 if (ret < 0) {
407 ✗ int explode = avctx->err_recognition & AV_EF_EXPLODE;
408 ✗ av_log(avctx, explode ? AV_LOG_ERROR: AV_LOG_WARNING,
409 "Error decoding the extradata\n");
410 ✗ if (explode) {
411 ✗ return ret;
412 }
413 ✗ ret = 0;
414 }
415 }
416 }
417
418
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 628 if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
419 ✗ h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
420 ✗ h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
421 }
422
423 628 ff_h264_flush_change(h);
424
425
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 628 if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
426 1 h->enable_er = 0;
427
428
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 628 if (h->enable_er && (avctx->active_thread_type & FF_THREAD_SLICE)) {
429 ✗ av_log(avctx, AV_LOG_WARNING,
430 "Error resilience with slice threads is enabled. It is unsafe and unsupported and may crash. "
431 "Use it at your own risk\n");
432 }
433
434 628 return 0;
435 }
436
437 /**
438 * instantaneous decoder refresh.
439 */
440 1745 static void idr(H264Context *h)
441 {
442 int i;
443 1745 ff_h264_remove_all_refs(h);
444 1745 h->poc.prev_frame_num =
445 1745 h->poc.prev_frame_num_offset = 0;
446 1745 h->poc.prev_poc_msb = 1<<16;
447 1745 h->poc.prev_poc_lsb = -1;
448
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 29665 for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
449 27920 h->last_pocs[i] = INT_MIN;
450 1745 }
451
452 /* forget old pics after a seek */
453 642 void ff_h264_flush_change(H264Context *h)
454 {
455 int i, j;
456
457 642 h->next_outputed_poc = INT_MIN;
458 642 h->prev_interlaced_frame = 1;
459 642 idr(h);
460
461 642 h->poc.prev_frame_num = -1;
462
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 642 if (h->cur_pic_ptr) {
463 ✗ h->cur_pic_ptr->reference = 0;
464 ✗ for (j=i=0; h->delayed_pic[i]; i++)
465 ✗ if (h->delayed_pic[i] != h->cur_pic_ptr)
466 ✗ h->delayed_pic[j++] = h->delayed_pic[i];
467 ✗ h->delayed_pic[j] = NULL;
468 }
469 642 ff_h264_unref_picture(&h->last_pic_for_ec);
470
471 642 h->first_field = 0;
472 642 h->recovery_frame = -1;
473 642 h->frame_recovered = 0;
474 642 h->current_slice = 0;
475 642 h->mmco_reset = 1;
476 642 }
477
478 6 static av_cold void h264_decode_flush(AVCodecContext *avctx)
479 {
480 6 H264Context *h = avctx->priv_data;
481 int i;
482
483 6 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
484
485 6 ff_h264_flush_change(h);
486 6 ff_h264_sei_uninit(&h->sei);
487
488
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 222 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
489 216 ff_h264_unref_picture(&h->DPB[i]);
490 6 h->cur_pic_ptr = NULL;
491 6 ff_h264_unref_picture(&h->cur_pic);
492
493 6 h->mb_y = 0;
494 6 h->non_gray = 0;
495
496 6 ff_h264_free_tables(h);
497 6 h->context_initialized = 0;
498
499
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 6 if (FF_HW_HAS_CB(avctx, flush))
500 ✗ FF_HW_SIMPLE_CALL(avctx, flush);
501 6 }
502
503 42 static int get_last_needed_nal(H264Context *h)
504 {
505 42 int nals_needed = 0;
506 42 int slice_type = 0;
507 42 int picture_intra_only = 1;
508 42 int first_slice = 0;
509 int i, ret;
510
511
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 86 for (i = 0; i < h->pkt.nb_nals; i++) {
512 44 H2645NAL *nal = &h->pkt.nals[i];
513 GetBitContext gb;
514
515 /* packets can sometimes contain multiple PPS/SPS,
516 * e.g. two PAFF field pictures in one packet, or a demuxer
517 * which splits NALs strangely if so, when frame threading we
518 * can't start the next thread until we've read all of them */
519
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 44 switch (nal->type) {
520 ✗ case H264_NAL_SPS:
521 case H264_NAL_PPS:
522 ✗ nals_needed = i;
523 ✗ break;
524 42 case H264_NAL_DPA:
525 case H264_NAL_IDR_SLICE:
526 case H264_NAL_SLICE:
527 42 ret = init_get_bits8(&gb, nal->data + 1, nal->size - 1);
528
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 42 if (ret < 0) {
529 ✗ av_log(h->avctx, AV_LOG_ERROR, "Invalid zero-sized VCL NAL unit\n");
530 ✗ if (h->avctx->err_recognition & AV_EF_EXPLODE)
531 ✗ return ret;
532
533 ✗ break;
534 }
535
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 42 if (!get_ue_golomb_long(&gb) || // first_mb_in_slice
536 ✗ !first_slice ||
537 ✗ first_slice != nal->type)
538 42 nals_needed = i;
539 42 slice_type = get_ue_golomb_31(&gb);
540
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 42 if (slice_type > 9)
541 ✗ slice_type = 0;
542
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 42 if (slice_type > 4)
543 42 slice_type -= 5;
544
545 42 slice_type = ff_h264_golomb_to_pict_type[slice_type];
546 42 picture_intra_only &= (slice_type & 3) == AV_PICTURE_TYPE_I;
547
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 42 if (!first_slice)
548 42 first_slice = nal->type;
549 }
550 }
551
552 42 h->picture_intra_only = picture_intra_only;
553
554 42 return nals_needed;
555 }
556
557 ✗ static void debug_green_metadata(const H264SEIGreenMetaData *gm, void *logctx)
558 {
559 ✗ av_log(logctx, AV_LOG_DEBUG, "Green Metadata Info SEI message\n");
560 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_type: %d\n", gm->green_metadata_type);
561
562 ✗ if (gm->green_metadata_type == 0) {
563 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_period_type: %d\n", gm->period_type);
564
565 ✗ if (gm->period_type == 2)
566 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_seconds: %d\n", gm->num_seconds);
567 ✗ else if (gm->period_type == 3)
568 ✗ av_log(logctx, AV_LOG_DEBUG, " green_metadata_num_pictures: %d\n", gm->num_pictures);
569
570 ✗ av_log(logctx, AV_LOG_DEBUG, " SEI GREEN Complexity Metrics: %f %f %f %f\n",
571 ✗ (float)gm->percent_non_zero_macroblocks/255,
572 ✗ (float)gm->percent_intra_coded_macroblocks/255,
573 ✗ (float)gm->percent_six_tap_filtering/255,
574 ✗ (float)gm->percent_alpha_point_deblocking_instance/255);
575
576 ✗ } else if (gm->green_metadata_type == 1) {
577 ✗ av_log(logctx, AV_LOG_DEBUG, " xsd_metric_type: %d\n", gm->xsd_metric_type);
578
579 ✗ if (gm->xsd_metric_type == 0)
580 ✗ av_log(logctx, AV_LOG_DEBUG, " xsd_metric_value: %f\n",
581 ✗ (float)gm->xsd_metric_value/100);
582 }
583 ✗ }
584
585 29720 static int decode_nal_units(H264Context *h, AVBufferRef *buf_ref,
586 const uint8_t *buf, int buf_size)
587 {
588 29720 AVCodecContext *const avctx = h->avctx;
589 29720 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
590 29720 int idr_cleared=0;
591 29720 int i, ret = 0;
592
593 29720 h->has_slice = 0;
594 29720 h->nal_unit_type= 0;
595
596
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 29720 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
597 28964 h->current_slice = 0;
598
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 28964 if (!h->first_field) {
599 25577 h->cur_pic_ptr = NULL;
600 25577 ff_h264_sei_uninit(&h->sei);
601 }
602 }
603
604
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 29720 if (h->nal_length_size == 4) {
605
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 3189 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
606 ✗ h->is_avc = 0;
607
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 3189 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
608 3189 h->is_avc = 1;
609 }
610
611 29720 ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->nal_length_size,
612 29720 avctx->codec_id, !!h->is_avc * H2645_FLAG_IS_NALFF);
613
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 29720 if (ret < 0) {
614 1 av_log(avctx, AV_LOG_ERROR,
615 "Error splitting the input into NAL units.\n");
616 1 return ret;
617 }
618
619
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 29719 if (avctx->active_thread_type & FF_THREAD_FRAME)
620 42 nals_needed = get_last_needed_nal(h);
621
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 29719 if (nals_needed < 0)
622 ✗ return nals_needed;
623
624
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 82086 for (i = 0; i < h->pkt.nb_nals; i++) {
625 52367 H2645NAL *nal = &h->pkt.nals[i];
626 int max_slice_ctx, err;
627
628
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 52367 if (avctx->skip_frame >= AVDISCARD_NONREF &&
629
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 928 nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
630 504 continue;
631
632 // FIXME these should stop being context-global variables
633 51863 h->nal_ref_idc = nal->ref_idc;
634 51863 h->nal_unit_type = nal->type;
635
636 51863 err = 0;
637
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 51863 switch (nal->type) {
638 2282 case H264_NAL_IDR_SLICE:
639
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 2282 if ((nal->data[1] & 0xFC) == 0x98) {
640 ✗ av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
641 ✗ h->next_outputed_poc = INT_MIN;
642 ✗ ret = -1;
643 ✗ goto end;
644 }
645
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 2282 if(!idr_cleared) {
646 1103 idr(h); // FIXME ensure we don't lose some frames if there is reordering
647 }
648 2282 idr_cleared = 1;
649 2282 h->has_recovery_point = 1;
650 38289 case H264_NAL_SLICE:
651 38289 h->has_slice = 1;
652
653
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✓ Branch 2 taken 38122 times.
 38289 if ((err = ff_h264_queue_decode_slice(h, nal))) {
654 167 H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
655 167 sl->ref_count[0] = sl->ref_count[1] = 0;
656 167 break;
657 }
658
659
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 38122 if (h->current_slice == 1) {
660
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 28868 if (avctx->active_thread_type & FF_THREAD_FRAME &&
661
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 42 i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
662 42 ff_thread_finish_setup(avctx);
663 42 h->setup_finished = 1;
664 }
665
666
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 28868 if (h->avctx->hwaccel &&
667 ✗ (ret = FF_HW_CALL(h->avctx, start_frame, buf_ref,
668 buf, buf_size)) < 0)
669 ✗ goto end;
670 }
671
672
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 38122 max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
673
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 38122 if (h->nb_slice_ctx_queued == max_slice_ctx) {
674
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 37292 if (h->avctx->hwaccel) {
675 ✗ ret = FF_HW_CALL(avctx, decode_slice, nal->raw_data, nal->raw_size);
676 ✗ h->nb_slice_ctx_queued = 0;
677 } else
678 37292 ret = ff_h264_execute_decode_slices(h);
679
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 37292 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
680 ✗ goto end;
681 }
682 38122 break;
683 ✗ case H264_NAL_DPA:
684 case H264_NAL_DPB:
685 case H264_NAL_DPC:
686 ✗ avpriv_request_sample(avctx, "data partitioning");
687 ✗ break;
688 2879 case H264_NAL_SEI:
689
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 2879 if (h->setup_finished) {
690 ✗ avpriv_request_sample(avctx, "Late SEI");
691 ✗ break;
692 }
693 2879 ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
694
4/4
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 2879 h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
695
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 2879 if (avctx->debug & FF_DEBUG_GREEN_MD)
696 ✗ debug_green_metadata(&h->sei.green_metadata, h->avctx);
697
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 2879 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
698 ✗ goto end;
699 2879 break;
700 1078 case H264_NAL_SPS: {
701 1078 GetBitContext tmp_gb = nal->gb;
702
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 1078 if (FF_HW_HAS_CB(avctx, decode_params)) {
703 ✗ ret = FF_HW_CALL(avctx, decode_params,
704 nal->type, nal->raw_data, nal->raw_size);
705 ✗ if (ret < 0)
706 ✗ goto end;
707 }
708
2/2
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✓ Branch 2 taken 2 times.
 1078 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
709 1078 break;
710 2 av_log(h->avctx, AV_LOG_DEBUG,
711 "SPS decoding failure, trying again with the complete NAL\n");
712 2 init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
713
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 2 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
714 2 break;
715 ✗ ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
716 ✗ break;
717 }
718 6952 case H264_NAL_PPS:
719
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 6952 if (FF_HW_HAS_CB(avctx, decode_params)) {
720 ✗ ret = FF_HW_CALL(avctx, decode_params,
721 nal->type, nal->raw_data, nal->raw_size);
722 ✗ if (ret < 0)
723 ✗ goto end;
724 }
725 6952 ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
726 nal->size_bits);
727
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 6952 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
728 ✗ goto end;
729 6952 break;
730 2665 case H264_NAL_AUD:
731 case H264_NAL_END_SEQUENCE:
732 case H264_NAL_END_STREAM:
733 case H264_NAL_FILLER_DATA:
734 case H264_NAL_SPS_EXT:
735 case H264_NAL_AUXILIARY_SLICE:
736 2665 break;
737 ✗ default:
738 ✗ av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
739 nal->type, nal->size_bits);
740 }
741
742
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 51863 if (err < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE)) {
743 ✗ av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
744 ✗ ret = err;
745 ✗ goto end;
746 }
747 }
748
749 29719 ret = ff_h264_execute_decode_slices(h);
750
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 29719 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
751 ✗ goto end;
752
753 // set decode_error_flags to allow users to detect concealed decoding errors
754
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 29719 if ((ret < 0 || h->er.error_occurred) && h->cur_pic_ptr) {
755
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 2 if (h->cur_pic_ptr->decode_error_flags) {
756 /* Frame-threading in use */
757 ✗ atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
758 /* Using atomics here is not supposed to provide synchronisation;
759 * they are merely used to allow to set decode_error from both
760 * decoding threads in case of coded slices. */
761 ✗ atomic_fetch_or_explicit(decode_error, FF_DECODE_ERROR_DECODE_SLICES,
762 memory_order_relaxed);
763 } else
764 2 h->cur_pic_ptr->f->decode_error_flags |= FF_DECODE_ERROR_DECODE_SLICES;
765 }
766
767 29719 ret = 0;
768 29719 end:
769
770 #if CONFIG_ERROR_RESILIENCE
771 /*
772 * FIXME: Error handling code does not seem to support interlaced
773 * when slices span multiple rows
774 * The ff_er_add_slice calls don't work right for bottom
775 * fields; they cause massive erroneous error concealing
776 * Error marking covers both fields (top and bottom).
777 * This causes a mismatched s->error_count
778 * and a bad error table. Further, the error count goes to
779 * INT_MAX when called for bottom field, because mb_y is
780 * past end by one (callers fault) and resync_mb_y != 0
781 * causes problems for the first MB line, too.
782 */
783
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 29719 if (!FIELD_PICTURE(h) && h->current_slice && h->enable_er) {
784
785 21726 H264SliceContext *sl = h->slice_ctx;
786
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 21726 int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
787 21726 int decode_error_flags = 0;
788
789 21726 ff_h264_set_erpic(&h->er.cur_pic, h->cur_pic_ptr);
790
791
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 21726 if (use_last_pic) {
792 516 ff_h264_set_erpic(&h->er.last_pic, &h->last_pic_for_ec);
793 516 sl->ref_list[0][0].parent = &h->last_pic_for_ec;
794 516 memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
795 516 memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
796 516 sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
797
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 21210 } else if (sl->ref_count[0]) {
798 19223 ff_h264_set_erpic(&h->er.last_pic, sl->ref_list[0][0].parent);
799 } else
800 1987 ff_h264_set_erpic(&h->er.last_pic, NULL);
801
802
2/2
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 21726 if (sl->ref_count[1])
803 19223 ff_h264_set_erpic(&h->er.next_pic, sl->ref_list[1][0].parent);
804
805 21726 ff_er_frame_end(&h->er, &decode_error_flags);
806
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 21726 if (decode_error_flags) {
807
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 1 if (h->cur_pic_ptr->decode_error_flags) {
808 ✗ atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
809 ✗ atomic_fetch_or_explicit(decode_error, decode_error_flags,
810 memory_order_relaxed);
811 } else
812 1 h->cur_pic_ptr->f->decode_error_flags |= decode_error_flags;
813 }
814
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 21726 if (use_last_pic)
815 516 memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
816 }
817 #endif /* CONFIG_ERROR_RESILIENCE */
818 /* clean up */
819
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 29719 if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
820 19259 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
821 19259 h->picture_structure == PICT_BOTTOM_FIELD);
822 }
823
824
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 29719 return (ret < 0) ? ret : buf_size;
825 }
826
827 1 static int h264_export_enc_params(AVFrame *f, const H264Picture *p)
828 {
829 AVVideoEncParams *par;
830 1 unsigned int nb_mb = p->mb_height * p->mb_width;
831 unsigned int x, y;
832
833 1 par = av_video_enc_params_create_side_data(f, AV_VIDEO_ENC_PARAMS_H264, nb_mb);
834
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 1 if (!par)
835 ✗ return AVERROR(ENOMEM);
836
837 1 par->qp = p->pps->init_qp;
838
839 1 par->delta_qp[1][0] = p->pps->chroma_qp_index_offset[0];
840 1 par->delta_qp[1][1] = p->pps->chroma_qp_index_offset[0];
841 1 par->delta_qp[2][0] = p->pps->chroma_qp_index_offset[1];
842 1 par->delta_qp[2][1] = p->pps->chroma_qp_index_offset[1];
843
844
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 19 for (y = 0; y < p->mb_height; y++)
845
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 414 for (x = 0; x < p->mb_width; x++) {
846 396 const unsigned int block_idx = y * p->mb_width + x;
847 396 const unsigned int mb_xy = y * p->mb_stride + x;
848 396 AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx);
849
850 396 b->src_x = x * 16;
851 396 b->src_y = y * 16;
852 396 b->w = 16;
853 396 b->h = 16;
854
855 396 b->delta_qp = p->qscale_table[mb_xy] - par->qp;
856 }
857
858 1 return 0;
859 }
860
861 24764 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
862 {
863 int ret;
864
865
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 24764 ret = av_frame_ref(dst, srcp->needs_fg ? srcp->f_grain : srcp->f);
866
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 24764 if (ret < 0)
867 ✗ return ret;
868
869
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 24764 if (srcp->needs_fg && (ret = av_frame_copy_props(dst, srcp->f)) < 0)
870 ✗ return ret;
871
872
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 24764 if (srcp->decode_error_flags) {
873 42 atomic_int *decode_error = srcp->decode_error_flags;
874 /* The following is not supposed to provide synchronisation at all:
875 * given that srcp has already finished decoding, decode_error
876 * has already been set to its final value. */
877 42 dst->decode_error_flags |= atomic_load_explicit(decode_error, memory_order_relaxed);
878 }
879
880 24764 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.common.frame_packing), 0);
881
882
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 24764 if (srcp->sei_recovery_frame_cnt == 0)
883 34 dst->flags |= AV_FRAME_FLAG_KEY;
884
885
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 24764 if (h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS) {
886 1 ret = h264_export_enc_params(dst, srcp);
887
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 1 if (ret < 0)
888 ✗ goto fail;
889 }
890
891
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 24764 if (!(h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN))
892 24764 av_frame_remove_side_data(dst, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
893
894 24764 return 0;
895 ✗ fail:
896 ✗ av_frame_unref(dst);
897 ✗ return ret;
898 }
899
900 ✗ static int is_avcc_extradata(const uint8_t *buf, int buf_size)
901 {
902 ✗ int cnt= buf[5]&0x1f;
903 ✗ const uint8_t *p= buf+6;
904 ✗ if (!cnt)
905 ✗ return 0;
906 ✗ while(cnt--){
907 ✗ int nalsize= AV_RB16(p) + 2;
908 ✗ if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
909 ✗ return 0;
910 ✗ p += nalsize;
911 }
912 ✗ cnt = *(p++);
913 ✗ if(!cnt)
914 ✗ return 0;
915 ✗ while(cnt--){
916 ✗ int nalsize= AV_RB16(p) + 2;
917 ✗ if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
918 ✗ return 0;
919 ✗ p += nalsize;
920 }
921 ✗ return 1;
922 }
923
924 24764 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
925 {
926 int ret;
927
928
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 24764 if (((h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
929
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 24764 (h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
930
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 24764 out->recovered)) {
931
932
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 24764 if (h->skip_gray > 0 &&
933 ✗ h->non_gray && out->gray &&
934 ✗ !(h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL)
935 )
936 ✗ return 0;
937
938
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 24764 if (!h->avctx->hwaccel &&
939
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 24764 (out->field_poc[0] == INT_MAX ||
940
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 24764 out->field_poc[1] == INT_MAX)
941 ) {
942 int p;
943 ✗ AVFrame *f = out->f;
944 ✗ int field = out->field_poc[0] == INT_MAX;
945 uint8_t *dst_data[4];
946 int linesizes[4];
947 const uint8_t *src_data[4];
948
949 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
950
951 ✗ for (p = 0; p<4; p++) {
952 ✗ dst_data[p] = f->data[p] + (field^1)*f->linesize[p];
953 ✗ src_data[p] = f->data[p] + field *f->linesize[p];
954 ✗ linesizes[p] = 2*f->linesize[p];
955 }
956
957 ✗ av_image_copy(dst_data, linesizes, src_data, linesizes,
958 ✗ f->format, f->width, f->height>>1);
959 }
960
961 24764 ret = output_frame(h, dst, out);
962
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 24764 if (ret < 0)
963 ✗ return ret;
964
965 24764 *got_frame = 1;
966
967 if (CONFIG_MPEGVIDEODEC) {
968 24764 ff_print_debug_info2(h->avctx, dst,
969 24764 out->mb_type,
970 24764 out->qscale_table,
971 24764 out->motion_val,
972 out->mb_width, out->mb_height, out->mb_stride, 1);
973 }
974 }
975
976 24764 return 0;
977 }
978
979 564 static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame,
980 int *got_frame, int buf_index)
981 {
982 int ret, i, out_idx;
983 H264Picture *out;
984
985 564 h->cur_pic_ptr = NULL;
986 564 h->first_field = 0;
987
988
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 1128 while (h->delayed_pic[0]) {
989 281 out = h->delayed_pic[0];
990 281 out_idx = 0;
991 281 for (i = 1;
992 1336 h->delayed_pic[i] &&
993
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 805 !(h->delayed_pic[i]->f->flags & AV_FRAME_FLAG_KEY) &&
994
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 524 !h->delayed_pic[i]->mmco_reset;
995 524 i++)
996
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 524 if (h->delayed_pic[i]->poc < out->poc) {
997 106 out = h->delayed_pic[i];
998 106 out_idx = i;
999 }
1000
1001
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 1044 for (i = out_idx; h->delayed_pic[i]; i++)
1002 763 h->delayed_pic[i] = h->delayed_pic[i + 1];
1003
1004
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 281 if (out) {
1005 281 h->frame_recovered |= out->recovered;
1006 281 out->recovered |= h->frame_recovered & FRAME_RECOVERED_SEI;
1007
1008 281 out->reference &= ~DELAYED_PIC_REF;
1009 281 ret = finalize_frame(h, dst_frame, out, got_frame);
1010
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 281 if (ret < 0)
1011 ✗ return ret;
1012
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 281 if (*got_frame)
1013 281 break;
1014 }
1015 }
1016
1017 564 return buf_index;
1018 }
1019
1020 30284 static int h264_decode_frame(AVCodecContext *avctx, AVFrame *pict,
1021 int *got_frame, AVPacket *avpkt)
1022 {
1023 30284 const uint8_t *buf = avpkt->data;
1024 30284 int buf_size = avpkt->size;
1025 30284 H264Context *h = avctx->priv_data;
1026 int buf_index;
1027 int ret;
1028
1029 30284 h->flags = avctx->flags;
1030 30284 h->setup_finished = 0;
1031 30284 h->nb_slice_ctx_queued = 0;
1032
1033 30284 ff_h264_unref_picture(&h->last_pic_for_ec);
1034
1035 /* end of stream, output what is still in the buffers */
1036
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 30284 if (buf_size == 0)
1037 564 return send_next_delayed_frame(h, pict, got_frame, 0);
1038
1039
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✓ Branch 2 taken 29716 times.
 29720 if (av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1040 size_t side_size;
1041 4 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1042 4 ff_h264_decode_extradata(side, side_size,
1043 &h->ps, &h->is_avc, &h->nal_length_size,
1044 avctx->err_recognition, avctx);
1045 }
1046
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 29720 if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
1047 ✗ if (is_avcc_extradata(buf, buf_size))
1048 ✗ return ff_h264_decode_extradata(buf, buf_size,
1049 &h->ps, &h->is_avc, &h->nal_length_size,
1050 avctx->err_recognition, avctx);
1051 }
1052
1053 29720 buf_index = decode_nal_units(h, avpkt->buf, buf, buf_size);
1054
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 29720 if (buf_index < 0)
1055 1 return AVERROR_INVALIDDATA;
1056
1057
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✓ Branch 3 taken 428 times.
 29719 if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
1058 ✗ av_assert0(buf_index <= buf_size);
1059 ✗ return send_next_delayed_frame(h, pict, got_frame, buf_index);
1060 }
1061
1062
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 29719 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1063
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 590 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1064
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 390 buf_size >= 4 && !memcmp("Q264", buf, 4))
1065 200 return buf_size;
1066 390 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1067 390 return AVERROR_INVALIDDATA;
1068 }
1069
1070
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 29129 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1071
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 756 (h->mb_y >= h->mb_height && h->mb_height)) {
1072
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 28673 if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1073 ✗ return ret;
1074
1075 /* Wait for second field. */
1076
2/2
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 28673 if (h->next_output_pic) {
1077 24483 ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1078
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 24483 if (ret < 0)
1079 ✗ return ret;
1080 }
1081 }
1082
1083
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 29129 av_assert0(pict->buf[0] || !*got_frame);
1084
1085 29129 ff_h264_unref_picture(&h->last_pic_for_ec);
1086
1087 29129 return buf_size;
1088 }
1089
1090 #define OFFSET(x) offsetof(H264Context, x)
1091 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1092 #define VDX VD | AV_OPT_FLAG_EXPORT
1093 static const AVOption h264_options[] = {
1094 { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VDX },
1095 { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, VDX },
1096 { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1097 { "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 },
1098 { "skip_gray", "Do not return gray gap frames", OFFSET(skip_gray), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VD },
1099 { "noref_gray", "Avoid using gray gap frames as references", OFFSET(noref_gray), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, VD },
1100 { NULL },
1101 };
1102
1103 static const AVClass h264_class = {
1104 .class_name = "H264 Decoder",
1105 .item_name = av_default_item_name,
1106 .option = h264_options,
1107 .version = LIBAVUTIL_VERSION_INT,
1108 };
1109
1110 const FFCodec ff_h264_decoder = {
1111 .p.name = "h264",
1112 CODEC_LONG_NAME("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1113 .p.type = AVMEDIA_TYPE_VIDEO,
1114 .p.id = AV_CODEC_ID_H264,
1115 .priv_data_size = sizeof(H264Context),
1116 .init = h264_decode_init,
1117 .close = h264_decode_end,
1118 FF_CODEC_DECODE_CB(h264_decode_frame),
1119 .p.capabilities = AV_CODEC_CAP_DR1 |
1120 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1121 AV_CODEC_CAP_FRAME_THREADS,
1122 .hw_configs = (const AVCodecHWConfigInternal *const []) {
1123 #if CONFIG_H264_DXVA2_HWACCEL
1124 HWACCEL_DXVA2(h264),
1125 #endif
1126 #if CONFIG_H264_D3D11VA_HWACCEL
1127 HWACCEL_D3D11VA(h264),
1128 #endif
1129 #if CONFIG_H264_D3D11VA2_HWACCEL
1130 HWACCEL_D3D11VA2(h264),
1131 #endif
1132 #if CONFIG_H264_D3D12VA_HWACCEL
1133 HWACCEL_D3D12VA(h264),
1134 #endif
1135 #if CONFIG_H264_NVDEC_HWACCEL
1136 HWACCEL_NVDEC(h264),
1137 #endif
1138 #if CONFIG_H264_VAAPI_HWACCEL
1139 HWACCEL_VAAPI(h264),
1140 #endif
1141 #if CONFIG_H264_VDPAU_HWACCEL
1142 HWACCEL_VDPAU(h264),
1143 #endif
1144 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1145 HWACCEL_VIDEOTOOLBOX(h264),
1146 #endif
1147 #if CONFIG_H264_VULKAN_HWACCEL
1148 HWACCEL_VULKAN(h264),
1149 #endif
1150 NULL
1151 },
1152 .caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING |
1153 FF_CODEC_CAP_INIT_CLEANUP,
1154 .flush = h264_decode_flush,
1155 UPDATE_THREAD_CONTEXT(ff_h264_update_thread_context),
1156 UPDATE_THREAD_CONTEXT_FOR_USER(ff_h264_update_thread_context_for_user),
1157 .p.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
1158 .p.priv_class = &h264_class,
1159 };
1160