FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/h264dec.c
Date: 2026-10-31 18:41:55
Exec Total Coverage
Lines: 505 680 74.3%
Functions: 24 26 92.3%
Branches: 282 485 58.1%
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 "decode.h"
46 #include "h264.h"
47 #include "h264dec.h"
48 #include "h2645_parse.h"
49 #include "h264data.h"
50 #include "h264_ps.h"
51 #include "golomb.h"
52 #include "hwaccel_internal.h"
53 #include "hwconfig.h"
54 #include "mpegutils.h"
55 #include "profiles.h"
56 #include "rectangle.h"
57 #include "libavutil/refstruct.h"
58 #include "thread.h"
59 #include "threadframe.h"
60
61 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
62
63 7584 int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
64 {
65 7584 H264Context *h = avctx->priv_data;
66
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 7584 return h && h->ps.sps ? h->ps.sps->num_reorder_frames : 0;
67 }
68
69 1485 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
70 int (*mv)[2][4][2],
71 int mb_x, int mb_y, int mb_intra, int mb_skipped)
72 {
73 1485 const H264Context *h = opaque;
74 1485 H264SliceContext *sl = &h->slice_ctx[0];
75
76 1485 sl->mb_x = mb_x;
77 1485 sl->mb_y = mb_y;
78 1485 sl->mb_xy = mb_x + mb_y * h->mb_stride;
79 1485 memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
80 av_assert1(ref >= 0);
81 /* FIXME: It is possible albeit uncommon that slice references
82 * differ between slices. We take the easy approach and ignore
83 * it for now. If this turns out to have any relevance in
84 * practice then correct remapping should be added. */
85
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 1485 if (ref >= sl->ref_count[0])
86 ✗ ref = 0;
87
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 1485 if (!sl->ref_list[0][ref].data[0]) {
88 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
89 ✗ ref = 0;
90 }
91
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 1485 if ((sl->ref_list[0][ref].reference&3) != 3) {
92 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
93 ✗ return;
94 }
95 1485 fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
96 2, 2, 2, ref, 1);
97 1485 fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
98 1485 fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
99 1485 pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
100 1485 sl->mb_mbaff =
101 1485 sl->mb_field_decoding_flag = 0;
102 1485 ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
103 }
104
105 392037 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
106 int y, int height)
107 {
108 392037 AVCodecContext *avctx = h->avctx;
109 392037 const AVFrame *src = h->cur_pic.f;
110 const AVPixFmtDescriptor *desc;
111 int offset[AV_NUM_DATA_POINTERS];
112 int vshift;
113 392037 const int field_pic = h->picture_structure != PICT_FRAME;
114
115
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 392037 if (!avctx->draw_horiz_band)
116 392037 return;
117
118 ✗ if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
119 ✗ return;
120
121 ✗ if (field_pic) {
122 ✗ height <<= 1;
123 ✗ y <<= 1;
124 }
125
126 ✗ height = FFMIN(height, avctx->height - y);
127
128 ✗ desc = av_pix_fmt_desc_get(avctx->pix_fmt);
129 ✗ vshift = desc->log2_chroma_h;
130
131 ✗ offset[0] = y * src->linesize[0];
132 ✗ offset[1] =
133 ✗ offset[2] = (y >> vshift) * src->linesize[1];
134 ✗ for (int i = 3; i < AV_NUM_DATA_POINTERS; i++)
135 ✗ offset[i] = 0;
136
137 ✗ emms_c();
138
139 ✗ avctx->draw_horiz_band(avctx, src, offset,
140 ✗ y, h->picture_structure, height);
141 }
142
143 1397 void ff_h264_free_tables(H264Context *h)
144 {
145 int i;
146
147 1397 av_freep(&h->intra4x4_pred_mode);
148 1397 av_freep(&h->chroma_pred_mode_table);
149 1397 av_freep(&h->cbp_table);
150 1397 av_freep(&h->mvd_table[0]);
151 1397 av_freep(&h->mvd_table[1]);
152 1397 av_freep(&h->direct_table);
153 1397 av_freep(&h->non_zero_count);
154 1397 av_freep(&h->slice_table_base);
155 1397 h->slice_table = NULL;
156 1397 av_freep(&h->list_counts);
157
158 1397 av_freep(&h->mb2b_xy);
159 1397 av_freep(&h->mb2br_xy);
160
161 1397 av_refstruct_pool_uninit(&h->qscale_table_pool);
162 1397 av_refstruct_pool_uninit(&h->mb_type_pool);
163 1397 av_refstruct_pool_uninit(&h->motion_val_pool);
164 1397 av_refstruct_pool_uninit(&h->ref_index_pool);
165
166 #if CONFIG_ERROR_RESILIENCE
167 1397 av_freep(&h->er.mb_index2xy);
168 1397 av_freep(&h->er.error_status_table);
169 1397 av_freep(&h->er.er_temp_buffer);
170 1397 av_freep(&h->dc_val_base);
171 #endif
172
173
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 2796 for (i = 0; i < h->nb_slice_ctx; i++) {
174 1399 H264SliceContext *sl = &h->slice_ctx[i];
175
176 1399 av_freep(&sl->bipred_scratchpad);
177 1399 av_freep(&sl->edge_emu_buffer);
178 1399 av_freep(&sl->top_borders[0]);
179 1399 av_freep(&sl->top_borders[1]);
180
181 1399 sl->bipred_scratchpad_allocated = 0;
182 1399 sl->edge_emu_buffer_allocated = 0;
183 1399 sl->top_borders_allocated[0] = 0;
184 1399 sl->top_borders_allocated[1] = 0;
185 }
186 1397 }
187
188 686 int ff_h264_alloc_tables(H264Context *h)
189 {
190 686 ERContext *const er = &h->er;
191 686 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
192 686 const int row_mb_num = 2*h->mb_stride*FFMAX(h->nb_slice_ctx, 1);
193 686 const int st_size = big_mb_num + h->mb_stride;
194 int x, y;
195
196
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 686 if (!FF_ALLOCZ_TYPED_ARRAY(h->intra4x4_pred_mode, row_mb_num * 8) ||
197
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->non_zero_count, big_mb_num) ||
198
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->slice_table_base, st_size) ||
199
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->cbp_table, big_mb_num) ||
200
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->chroma_pred_mode_table, big_mb_num) ||
201
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[0], row_mb_num * 8) ||
202
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->mvd_table[1], row_mb_num * 8) ||
203
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->direct_table, big_mb_num * 4) ||
204
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->list_counts, big_mb_num) ||
205
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->mb2b_xy, big_mb_num) ||
206
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->mb2br_xy, big_mb_num))
207 ✗ return AVERROR(ENOMEM);
208 686 h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
209 686 h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
210 686 h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
211 686 memset(h->slice_table_base, -1,
212 st_size * sizeof(*h->slice_table_base));
213 686 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
214
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 17855 for (y = 0; y < h->mb_height; y++)
215
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 1074894 for (x = 0; x < h->mb_width; x++) {
216 1057725 const int mb_xy = x + y * h->mb_stride;
217 1057725 const int b_xy = 4 * x + 4 * y * h->b_stride;
218
219 1057725 h->mb2b_xy[mb_xy] = b_xy;
220 1057725 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
221 }
222
223 if (CONFIG_ERROR_RESILIENCE) {
224 686 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
225 686 int yc_size = y_size + 2 * big_mb_num;
226
227 /* init ER */
228 686 er->avctx = h->avctx;
229 686 er->decode_mb = h264_er_decode_mb;
230 686 er->opaque = h;
231 686 er->quarter_sample = 1;
232
233 686 er->mb_num = h->mb_num;
234 686 er->mb_width = h->mb_width;
235 686 er->mb_height = h->mb_height;
236 686 er->mb_stride = h->mb_stride;
237 686 er->b8_stride = h->mb_width * 2 + 1;
238
239 // error resilience code looks cleaner with this
240
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 686 if (!FF_ALLOCZ_TYPED_ARRAY(er->mb_index2xy, h->mb_num + 1) ||
241
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 686 !FF_ALLOCZ_TYPED_ARRAY(h->dc_val_base, yc_size))
242 ✗ return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
243
244
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 17855 for (y = 0; y < h->mb_height; y++)
245
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 1074894 for (x = 0; x < h->mb_width; x++)
246 1057725 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
247
248 686 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
249 686 h->mb_stride + h->mb_width;
250 686 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
251 686 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
252 686 er->dc_val[2] = er->dc_val[1] + big_mb_num;
253
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 6520678 for (int i = 0; i < yc_size; i++)
254 6519992 h->dc_val_base[i] = 1024;
255
256 686 return ff_er_init(er);
257 }
258
259 return 0;
260 }
261
262 /**
263 * Init slice context
264 */
265 687 void ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
266 {
267 687 sl->ref_cache[0][scan8[5] + 1] =
268 687 sl->ref_cache[0][scan8[7] + 1] =
269 687 sl->ref_cache[0][scan8[13] + 1] =
270 687 sl->ref_cache[1][scan8[5] + 1] =
271 687 sl->ref_cache[1][scan8[7] + 1] =
272 687 sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
273
274 687 sl->er = &h->er;
275 687 }
276
277 26904 static int h264_init_pic(H264Picture *pic)
278 {
279 26904 pic->f = av_frame_alloc();
280
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 26904 if (!pic->f)
281 ✗ return AVERROR(ENOMEM);
282
283 26904 pic->f_grain = av_frame_alloc();
284
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 26904 if (!pic->f_grain)
285 ✗ return AVERROR(ENOMEM);
286
287 26904 return 0;
288 }
289
290 708 static int h264_init_context(AVCodecContext *avctx, H264Context *h)
291 {
292 int i, ret;
293
294 708 h->avctx = avctx;
295 708 h->cur_chroma_format_idc = -1;
296
297 708 h->width_from_caller = avctx->width;
298 708 h->height_from_caller = avctx->height;
299
300 708 h->workaround_bugs = avctx->workaround_bugs;
301 708 h->flags = avctx->flags;
302 708 h->poc.prev_poc_msb = 1 << 16;
303 708 h->recovery_frame = -1;
304 708 h->frame_recovered = 0;
305 708 h->poc.prev_frame_num = -1;
306 708 h->sei.common.frame_packing.arrangement_cancel_flag = -1;
307 708 h->sei.common.unregistered.x264_build = -1;
308
309 708 h->next_outputed_poc = INT_MIN;
310
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 12036 for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
311 11328 h->last_pocs[i] = INT_MIN;
312
313 708 ff_h264_sei_uninit(&h->sei);
314
315
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 708 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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 708 h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? avctx->thread_count : 1;
322 708 h->slice_ctx = av_calloc(h->nb_slice_ctx, sizeof(*h->slice_ctx));
323
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 708 if (!h->slice_ctx) {
324 ✗ h->nb_slice_ctx = 0;
325 ✗ return AVERROR(ENOMEM);
326 }
327
328
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 26196 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
329
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 25488 if ((ret = h264_init_pic(&h->DPB[i])) < 0)
330 ✗ return ret;
331 }
332
333
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 708 if ((ret = h264_init_pic(&h->cur_pic)) < 0)
334 ✗ return ret;
335
336
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 708 if ((ret = h264_init_pic(&h->last_pic_for_ec)) < 0)
337 ✗ return ret;
338
339
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 1417 for (i = 0; i < h->nb_slice_ctx; i++)
340 709 h->slice_ctx[i].h264 = h;
341
342 708 return 0;
343 }
344
345 26904 static void h264_free_pic(H264Context *h, H264Picture *pic)
346 {
347 26904 ff_h264_unref_picture(pic);
348 26904 av_frame_free(&pic->f);
349 26904 av_frame_free(&pic->f_grain);
350 26904 }
351
352 708 static av_cold int h264_decode_end(AVCodecContext *avctx)
353 {
354 708 H264Context *h = avctx->priv_data;
355 int i;
356
357 708 ff_h264_remove_all_refs(h);
358 708 ff_h264_free_tables(h);
359
360
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 26196 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
361 25488 h264_free_pic(h, &h->DPB[i]);
362 }
363 708 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
364
365 708 h->cur_pic_ptr = NULL;
366
367 708 av_refstruct_pool_uninit(&h->decode_error_flags_pool);
368
369 708 av_freep(&h->slice_ctx);
370 708 h->nb_slice_ctx = 0;
371
372 708 ff_h264_sei_uninit(&h->sei);
373 708 ff_h264_ps_uninit(&h->ps);
374
375 708 ff_h2645_packet_uninit(&h->pkt);
376
377 708 h264_free_pic(h, &h->cur_pic);
378 708 h264_free_pic(h, &h->last_pic_for_ec);
379
380 708 return 0;
381 }
382
383 static AVOnce h264_vlc_init = AV_ONCE_INIT;
384
385 708 static av_cold int h264_decode_init(AVCodecContext *avctx)
386 {
387 708 H264Context *h = avctx->priv_data;
388 int ret;
389
390 708 ret = h264_init_context(avctx, h);
391
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 708 if (ret < 0)
392 ✗ return ret;
393
394 708 ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
395
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 708 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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 708 if (!avctx->internal->is_copy) {
401
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 692 if (avctx->extradata_size > 0 && avctx->extradata) {
402 435 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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 435 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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 708 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
422 708 ff_h264_flush_change(h);
423
424
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 708 if (h->enable_er < 0 && (avctx->active_thread_type & FF_THREAD_SLICE))
425 1 h->enable_er = 0;
426
427
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 708 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
433 708 return 0;
434 }
435
436 /**
437 * instantaneous decoder refresh.
438 */
439 1956 static void idr(H264Context *h)
440 {
441 int i;
442 1956 ff_h264_remove_all_refs(h);
443 1956 h->poc.prev_frame_num =
444 1956 h->poc.prev_frame_num_offset = 0;
445 1956 h->poc.prev_poc_msb = 1<<16;
446 1956 h->poc.prev_poc_lsb = -1;
447
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 33252 for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
448 31296 h->last_pocs[i] = INT_MIN;
449 1956 }
450
451 /* forget old pics after a seek */
452 719 void ff_h264_flush_change(H264Context *h)
453 {
454 int i, j;
455
456 719 h->next_outputed_poc = INT_MIN;
457 719 h->prev_interlaced_frame = 1;
458 719 idr(h);
459
460 719 h->poc.prev_frame_num = -1;
461
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 719 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 }
468 719 ff_h264_unref_picture(&h->last_pic_for_ec);
469
470 719 h->first_field = 0;
471 719 h->recovery_frame = -1;
472 719 h->frame_recovered = 0;
473 719 h->current_slice = 0;
474 719 h->mmco_reset = 1;
475 719 }
476
477 3 static av_cold void h264_decode_flush(AVCodecContext *avctx)
478 {
479 3 H264Context *h = avctx->priv_data;
480 int i;
481
482 3 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
483
484 3 ff_h264_flush_change(h);
485 3 ff_h264_sei_uninit(&h->sei);
486
487
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 111 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
488 108 ff_h264_unref_picture(&h->DPB[i]);
489 3 h->cur_pic_ptr = NULL;
490 3 ff_h264_unref_picture(&h->cur_pic);
491
492 3 h->mb_y = 0;
493 3 h->non_gray = 0;
494
495 3 ff_h264_free_tables(h);
496 3 h->context_initialized = 0;
497
498
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 3 if (FF_HW_HAS_CB(avctx, flush))
499 ✗ FF_HW_SIMPLE_CALL(avctx, flush);
500 3 }
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 /**
585 * Attach the partitions B and C immediately following the partition A at idx.
586 * Arbitrary slice order may separate them (7.4.1.2.5); that is not supported.
587 *
588 * @return index of the last NAL absorbed, or idx if there were none.
589 */
590 60 static int h264_attach_partitions(const H264Context *h, H264SliceContext *sl,
591 int idx)
592 {
593
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 165 while (idx + 1 < h->pkt.nb_nals) {
594 105 const H2645NAL *nal = &h->pkt.nals[idx + 1];
595
596
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 105 if (nal->type != H264_NAL_DPB && nal->type != H264_NAL_DPC)
597 ✗ break;
598
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 105 if (ff_h264_attach_slice_partition(h, sl, nal) < 0)
599 ✗ break;
600 105 idx++;
601 }
602
603 60 return idx;
604 }
605
606 3118 static int h264_decode_sei(H264Context *h, H2645NAL *nal)
607 {
608 3118 AVCodecContext *const avctx = h->avctx;
609 int ret;
610
611 3118 ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
612
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 3118 h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
613
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 3118 if (avctx->debug & FF_DEBUG_GREEN_MD)
614 ✗ debug_green_metadata(&h->sei.green_metadata, avctx);
615
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 3118 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
616 ✗ return ret;
617
618 3118 return 0;
619 }
620
621 /* Decode the SEI NAL units following the slice at idx. */
622 42 static int h264_decode_late_sei(H264Context *h, int idx)
623 {
624
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 42 for (int i = idx + 1; i < h->pkt.nb_nals; i++) {
625 ✗ H2645NAL *nal = &h->pkt.nals[i];
626 int ret;
627
628 ✗ if (nal->type != H264_NAL_SEI)
629 ✗ continue;
630
631 ✗ ret = h264_decode_sei(h, nal);
632 ✗ if (ret < 0)
633 ✗ return ret;
634 }
635
636 42 return 0;
637 }
638
639 30291 static int decode_nal_units(H264Context *h, AVBufferRef *buf_ref,
640 const uint8_t *buf, int buf_size)
641 {
642 30291 AVCodecContext *const avctx = h->avctx;
643 30291 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
644 30291 int idr_cleared=0;
645 30291 int dp_attached_to = -1; ///< index of the last partition B/C claimed
646 30291 int i, ret = 0;
647
648 30291 h->has_slice = 0;
649 30291 h->nal_unit_type= 0;
650
651
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 30291 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
652 29535 h->current_slice = 0;
653
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 29535 if (!h->first_field) {
654 26120 h->cur_pic_ptr = NULL;
655 26120 ff_h264_sei_uninit(&h->sei);
656 }
657 }
658
659
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 30291 if (h->nal_length_size == 4) {
660
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 3490 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
661 ✗ h->is_avc = 0;
662
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 3490 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
663 3490 h->is_avc = 1;
664 }
665
666 30291 ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->nal_length_size,
667 30291 avctx->codec_id, !!h->is_avc * H2645_FLAG_IS_NALFF);
668
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 30291 if (ret < 0) {
669 1 av_log(avctx, AV_LOG_ERROR,
670 "Error splitting the input into NAL units.\n");
671 1 return ret;
672 }
673
674
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 30290 if (avctx->active_thread_type & FF_THREAD_FRAME)
675 42 nals_needed = get_last_needed_nal(h);
676
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 30290 if (nals_needed < 0)
677 ✗ return nals_needed;
678
679
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 84310 for (i = 0; i < h->pkt.nb_nals; i++) {
680 54020 H2645NAL *nal = &h->pkt.nals[i];
681 H264SliceContext *queued;
682 int max_slice_ctx, err;
683
684
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 54020 if (avctx->skip_frame >= AVDISCARD_NONREF &&
685
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 928 nal->ref_idc == 0 && nal->type != H264_NAL_SEI)
686 504 continue;
687
688 // FIXME these should stop being context-global variables
689 53516 h->nal_ref_idc = nal->ref_idc;
690 53516 h->nal_unit_type = nal->type;
691
692 53516 err = 0;
693
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 53516 switch (nal->type) {
694 2471 case H264_NAL_IDR_SLICE:
695
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 2471 if ((nal->data[1] & 0xFC) == 0x98) {
696 ✗ av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
697 ✗ h->next_outputed_poc = INT_MIN;
698 ✗ ret = -1;
699 ✗ goto end;
700 }
701
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 2471 if(!idr_cleared) {
702 1237 idr(h); // FIXME ensure we don't lose some frames if there is reordering
703 }
704 2471 idr_cleared = 1;
705 2471 h->has_recovery_point = 1;
706 av_fallthrough;
707 39413 case H264_NAL_SLICE:
708 case H264_NAL_DPA:
709 39413 h->has_slice = 1;
710
711
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 39413 if (nal->type == H264_NAL_DPA) {
712 /* partitioned streams all come from JM or a derivative */
713
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 60 if (h->workaround_bugs & FF_BUG_AUTODETECT)
714 30 h->workaround_bugs |= FF_BUG_H264_DP_NNZ;
715
716 /* hwaccels take one self-contained slice NAL, not three */
717
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 60 if (avctx->hwaccel) {
718 ✗ avpriv_request_sample(avctx, "hardware accelerated data partitioning");
719 ✗ ret = AVERROR_PATCHWELCOME;
720 ✗ goto end;
721 }
722 /* the lookahead needs all three partitions in one packet */
723
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 60 if (avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) {
724 ✗ av_log(avctx, AV_LOG_ERROR, "Decoding in chunks is not "
725 "supported for partitioned slices\n");
726 ✗ ret = AVERROR(ENOSYS);
727 ✗ goto end;
728 }
729 }
730
731
2/2
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✓ Branch 2 taken 39246 times.
 39413 if ((err = ff_h264_queue_decode_slice(h, nal, &queued))) {
732 167 H264SliceContext *sl = h->slice_ctx + h->nb_slice_ctx_queued;
733 167 sl->ref_count[0] = sl->ref_count[1] = 0;
734 167 break;
735 }
736
737
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 39246 if (nal->type == H264_NAL_DPA && queued)
738 60 dp_attached_to = h264_attach_partitions(h, queued, i);
739
740
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 39246 if (h->current_slice == 1) {
741
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 29441 if (avctx->active_thread_type & FF_THREAD_FRAME &&
742
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 42 i >= nals_needed && !h->setup_finished && h->cur_pic_ptr) {
743 42 ret = h264_decode_late_sei(h, i);
744
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 42 if (ret < 0)
745 ✗ goto end;
746 42 ff_thread_finish_setup(avctx);
747 42 h->setup_finished = 1;
748 }
749
750
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 29441 if (h->avctx->hwaccel &&
751 ✗ (ret = FF_HW_CALL(h->avctx, start_frame, buf_ref,
752 buf, buf_size)) < 0)
753 ✗ goto end;
754 }
755
756
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 39246 max_slice_ctx = avctx->hwaccel ? 1 : h->nb_slice_ctx;
757
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 39246 if (h->nb_slice_ctx_queued == max_slice_ctx) {
758
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 38416 if (h->avctx->hwaccel) {
759 ✗ ret = FF_HW_CALL(avctx, decode_slice, nal->raw_data, nal->raw_size);
760 ✗ h->nb_slice_ctx_queued = 0;
761 } else
762 38416 ret = ff_h264_execute_decode_slices(h);
763
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 38416 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
764 ✗ goto end;
765 }
766 39246 break;
767 105 case H264_NAL_DPB:
768 case H264_NAL_DPC:
769 /* not claimed by the lookahead above, so it has no partition A */
770
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 105 if (i > dp_attached_to)
771 ✗ av_log(avctx, AV_LOG_WARNING, "Ignoring slice data partition "
772 "%c without a matching partition A\n",
773 ✗ nal->type == H264_NAL_DPB ? 'B' : 'C');
774 105 break;
775 3118 case H264_NAL_SEI:
776 /* already decoded by h264_decode_late_sei() */
777
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 3118 if (h->setup_finished)
778 ✗ break;
779 3118 ret = h264_decode_sei(h, nal);
780
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 3118 if (ret < 0)
781 ✗ goto end;
782 3118 break;
783 1114 case H264_NAL_SPS: {
784 1114 GetBitContext tmp_gb = nal->gb;
785
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 1114 if (FF_HW_HAS_CB(avctx, decode_params)) {
786 ✗ ret = FF_HW_CALL(avctx, decode_params,
787 nal->type, nal->raw_data, nal->raw_size);
788 ✗ if (ret < 0)
789 ✗ goto end;
790 }
791
2/2
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✓ Branch 2 taken 2 times.
 1114 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
792 1114 break;
793 2 av_log(h->avctx, AV_LOG_DEBUG,
794 "SPS decoding failure, trying again with the complete NAL\n");
795 2 init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
796
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✗ Branch 2 not taken.
 2 if (ff_h264_decode_seq_parameter_set(&tmp_gb, avctx, &h->ps, 0) >= 0)
797 2 break;
798 ✗ ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps, 1);
799 ✗ break;
800 }
801 7053 case H264_NAL_PPS:
802
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 7053 if (FF_HW_HAS_CB(avctx, decode_params)) {
803 ✗ ret = FF_HW_CALL(avctx, decode_params,
804 nal->type, nal->raw_data, nal->raw_size);
805 ✗ if (ret < 0)
806 ✗ goto end;
807 }
808 7053 ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
809 nal->size_bits);
810
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 7053 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
811 ✗ goto end;
812 7053 break;
813 2713 case H264_NAL_AUD:
814 case H264_NAL_END_SEQUENCE:
815 case H264_NAL_END_STREAM:
816 case H264_NAL_FILLER_DATA:
817 case H264_NAL_SPS_EXT:
818 case H264_NAL_AUXILIARY_SLICE:
819 2713 break;
820 ✗ default:
821 ✗ av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
822 nal->type, nal->size_bits);
823 }
824
825
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 53516 if (err < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE)) {
826 ✗ av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
827 ✗ ret = err;
828 ✗ goto end;
829 }
830 }
831
832 30290 ret = ff_h264_execute_decode_slices(h);
833
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 30290 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
834 ✗ goto end;
835
836 // set decode_error_flags to allow users to detect concealed decoding errors
837
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 30290 if ((ret < 0 || h->er.error_occurred) && h->cur_pic_ptr) {
838
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 18 if (h->cur_pic_ptr->decode_error_flags) {
839 /* Frame-threading in use */
840 ✗ atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
841 /* Using atomics here is not supposed to provide synchronisation;
842 * they are merely used to allow to set decode_error from both
843 * decoding threads in case of coded slices. */
844 ✗ atomic_fetch_or_explicit(decode_error, FF_DECODE_ERROR_DECODE_SLICES,
845 memory_order_relaxed);
846 } else
847 18 h->cur_pic_ptr->f->decode_error_flags |= FF_DECODE_ERROR_DECODE_SLICES;
848 }
849
850 30290 ret = 0;
851 30290 end:
852
853 #if CONFIG_ERROR_RESILIENCE
854 /*
855 * FIXME: Error handling code does not seem to support interlaced
856 * when slices span multiple rows
857 * The ff_er_add_slice calls don't work right for bottom
858 * fields; they cause massive erroneous error concealing
859 * Error marking covers both fields (top and bottom).
860 * This causes a mismatched s->error_count
861 * and a bad error table. Further, the error count goes to
862 * INT_MAX when called for bottom field, because mb_y is
863 * past end by one (callers fault) and resync_mb_y != 0
864 * causes problems for the first MB line, too.
865 */
866
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✓ Branch 7 taken 51 times.
 52529 if (!FIELD_PICTURE(h) && h->current_slice && h->enable_er &&
867 22239 !ff_decode_skip_all_pixels(h->avctx)) {
868
869 22188 H264SliceContext *sl = h->slice_ctx;
870
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✗ Branch 3 not taken.
 22188 int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
871 22188 int decode_error_flags = 0;
872
873 22188 ff_h264_set_erpic(&h->er.cur_pic, h->cur_pic_ptr);
874
875
2/2
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 22188 if (use_last_pic) {
876 581 ff_h264_set_erpic(&h->er.last_pic, &h->last_pic_for_ec);
877 581 sl->ref_list[0][0].parent = &h->last_pic_for_ec;
878 581 memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
879 581 memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
880 581 sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
881
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 21607 } else if (sl->ref_count[0]) {
882 19544 ff_h264_set_erpic(&h->er.last_pic, sl->ref_list[0][0].parent);
883 } else
884 2063 ff_h264_set_erpic(&h->er.last_pic, NULL);
885
886
2/2
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 22188 if (sl->ref_count[1])
887 19544 ff_h264_set_erpic(&h->er.next_pic, sl->ref_list[1][0].parent);
888
889 22188 ff_er_frame_end(&h->er, &decode_error_flags);
890
2/2
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✓ Branch 1 taken 22171 times.
 22188 if (decode_error_flags) {
891
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✓ Branch 1 taken 17 times.
 17 if (h->cur_pic_ptr->decode_error_flags) {
892 ✗ atomic_int *decode_error = h->cur_pic_ptr->decode_error_flags;
893 ✗ atomic_fetch_or_explicit(decode_error, decode_error_flags,
894 memory_order_relaxed);
895 } else
896 17 h->cur_pic_ptr->f->decode_error_flags |= decode_error_flags;
897 }
898
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 22188 if (use_last_pic)
899 581 memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
900 }
901 #endif /* CONFIG_ERROR_RESILIENCE */
902 /* clean up */
903
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 30290 if (h->cur_pic_ptr && !h->droppable && h->has_slice) {
904 19694 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
905 19694 h->picture_structure == PICT_BOTTOM_FIELD);
906 }
907
908
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 30290 return (ret < 0) ? ret : buf_size;
909 }
910
911 1 static int h264_export_enc_params(AVFrame *f, const H264Picture *p)
912 {
913 AVVideoEncParams *par;
914 1 unsigned int nb_mb = p->mb_height * p->mb_width;
915 unsigned int x, y;
916
917 1 par = av_video_enc_params_create_side_data(f, AV_VIDEO_ENC_PARAMS_H264, nb_mb);
918
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 1 if (!par)
919 ✗ return AVERROR(ENOMEM);
920
921 1 par->qp = p->pps->init_qp;
922
923 1 par->delta_qp[1][0] = p->pps->chroma_qp_index_offset[0];
924 1 par->delta_qp[1][1] = p->pps->chroma_qp_index_offset[0];
925 1 par->delta_qp[2][0] = p->pps->chroma_qp_index_offset[1];
926 1 par->delta_qp[2][1] = p->pps->chroma_qp_index_offset[1];
927
928
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 19 for (y = 0; y < p->mb_height; y++)
929
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 414 for (x = 0; x < p->mb_width; x++) {
930 396 const unsigned int block_idx = y * p->mb_width + x;
931 396 const unsigned int mb_xy = y * p->mb_stride + x;
932 396 AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx);
933
934 396 b->src_x = x * 16;
935 396 b->src_y = y * 16;
936 396 b->w = 16;
937 396 b->h = 16;
938
939 396 b->delta_qp = p->qscale_table[mb_xy] - par->qp;
940 }
941
942 1 return 0;
943 }
944
945 25267 static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
946 {
947 int ret;
948
949
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 25267 ret = av_frame_ref(dst, srcp->needs_fg ? srcp->f_grain : srcp->f);
950
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 25267 if (ret < 0)
951 ✗ return ret;
952
953
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✗ Branch 3 not taken.
✗ Branch 4 not taken.
 25267 if (srcp->needs_fg && (ret = av_frame_copy_props(dst, srcp->f)) < 0)
954 ✗ return ret;
955
956
2/2
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 25267 if (srcp->decode_error_flags) {
957 42 atomic_int *decode_error = srcp->decode_error_flags;
958 /* The following is not supposed to provide synchronisation at all:
959 * given that srcp has already finished decoding, decode_error
960 * has already been set to its final value. */
961 42 dst->decode_error_flags |= atomic_load_explicit(decode_error, memory_order_relaxed);
962 }
963
964 25267 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(&h->sei.common.frame_packing), 0);
965
966
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 25267 if (srcp->sei_recovery_frame_cnt == 0)
967 34 dst->flags |= AV_FRAME_FLAG_KEY;
968
969
2/2
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 25267 if (h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS) {
970 1 ret = h264_export_enc_params(dst, srcp);
971
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 1 if (ret < 0)
972 ✗ goto fail;
973 }
974
975
1/2
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 25267 if (!(h->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN))
976 25267 av_frame_remove_side_data(dst, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
977
978 25267 return 0;
979 ✗ fail:
980 ✗ av_frame_unref(dst);
981 ✗ return ret;
982 }
983
984 ✗ static int is_avcc_extradata(const uint8_t *buf, int buf_size)
985 {
986 ✗ int cnt= buf[5]&0x1f;
987 ✗ const uint8_t *p= buf+6;
988 ✗ if (!cnt)
989 ✗ return 0;
990 ✗ while(cnt--){
991 ✗ int nalsize= AV_RB16(p) + 2;
992 ✗ if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 7)
993 ✗ return 0;
994 ✗ p += nalsize;
995 }
996 ✗ cnt = *(p++);
997 ✗ if(!cnt)
998 ✗ return 0;
999 ✗ while(cnt--){
1000 ✗ int nalsize= AV_RB16(p) + 2;
1001 ✗ if(nalsize > buf_size - (p-buf) || (p[2] & 0x9F) != 8)
1002 ✗ return 0;
1003 ✗ p += nalsize;
1004 }
1005 ✗ return 1;
1006 }
1007
1008 25267 static int finalize_frame(H264Context *h, AVFrame *dst, H264Picture *out, int *got_frame)
1009 {
1010 int ret;
1011
1012
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 25267 if (((h->avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
1013
1/2
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✗ Branch 1 not taken.
 25267 (h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL) ||
1014
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 25267 out->recovered)) {
1015
1016
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 25267 if (h->skip_gray > 0 &&
1017 ✗ h->non_gray && out->gray &&
1018 ✗ !(h->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL)
1019 )
1020 ✗ return 0;
1021
1022
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✓ Branch 3 taken 25193 times.
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 25267 if (!h->avctx->hwaccel && !ff_decode_skip_all_pixels(h->avctx) &&
1023
1/2
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✗ Branch 1 not taken.
 25193 (out->field_poc[0] == INT_MAX ||
1024
1/2
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✓ Branch 1 taken 25193 times.
 25193 out->field_poc[1] == INT_MAX)
1025 ) {
1026 int p;
1027 ✗ AVFrame *f = out->f;
1028 ✗ int field = out->field_poc[0] == INT_MAX;
1029 uint8_t *dst_data[4];
1030 int linesizes[4];
1031 const uint8_t *src_data[4];
1032
1033 ✗ av_log(h->avctx, AV_LOG_DEBUG, "Duplicating field %d to fill missing\n", field);
1034
1035 ✗ for (p = 0; p<4; p++) {
1036 ✗ dst_data[p] = FF_PTR_ADD(f->data[p], (field^1)*f->linesize[p]);
1037 ✗ src_data[p] = FF_PTR_ADD(f->data[p], field *f->linesize[p]);
1038 ✗ linesizes[p] = 2*f->linesize[p];
1039 }
1040
1041 ✗ av_image_copy(dst_data, linesizes, src_data, linesizes,
1042 ✗ f->format, f->width, f->height>>1);
1043 }
1044
1045 25267 ret = output_frame(h, dst, out);
1046
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 25267 if (ret < 0)
1047 ✗ return ret;
1048
1049 25267 *got_frame = 1;
1050
1051 if (CONFIG_MPEGVIDEODEC) {
1052 25267 ff_print_debug_info2(h->avctx, dst,
1053 25267 out->mb_type,
1054 25267 out->qscale_table,
1055 25267 out->motion_val,
1056 out->mb_width, out->mb_height, out->mb_stride, 1);
1057 }
1058 }
1059
1060 25267 return 0;
1061 }
1062
1063 609 static int send_next_delayed_frame(H264Context *h, AVFrame *dst_frame,
1064 int *got_frame, int buf_index)
1065 {
1066 int ret, i, out_idx;
1067 H264Picture *out;
1068
1069 609 h->cur_pic_ptr = NULL;
1070 609 h->first_field = 0;
1071
1072
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✓ Branch 1 taken 303 times.
 1218 while (h->delayed_pic[0]) {
1073 306 out = h->delayed_pic[0];
1074 306 out_idx = 0;
1075 306 for (i = 1;
1076 1504 h->delayed_pic[i] &&
1077
4/4
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✓ Branch 3 taken 8 times.
 901 !(h->delayed_pic[i]->f->flags & AV_FRAME_FLAG_KEY) &&
1078
1/2
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✗ Branch 1 not taken.
 595 !h->delayed_pic[i]->mmco_reset;
1079 595 i++)
1080
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✓ Branch 1 taken 477 times.
 595 if (h->delayed_pic[i]->poc < out->poc) {
1081 118 out = h->delayed_pic[i];
1082 118 out_idx = i;
1083 }
1084
1085
2/2
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 1165 for (i = out_idx; h->delayed_pic[i]; i++)
1086 859 h->delayed_pic[i] = h->delayed_pic[i + 1];
1087
1088
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✓ Branch 1 taken 306 times.
 306 if (out) {
1089 306 h->frame_recovered |= out->recovered;
1090 306 out->recovered |= h->frame_recovered & FRAME_RECOVERED_SEI;
1091
1092 306 out->reference &= ~DELAYED_PIC_REF;
1093 306 ret = finalize_frame(h, dst_frame, out, got_frame);
1094
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 306 if (ret < 0)
1095 ✗ return ret;
1096
1/2
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✗ Branch 1 not taken.
 306 if (*got_frame)
1097 306 break;
1098 }
1099 }
1100
1101 609 return buf_index;
1102 }
1103
1104 30900 static int h264_decode_frame(AVCodecContext *avctx, AVFrame *pict,
1105 int *got_frame, AVPacket *avpkt)
1106 {
1107 30900 const uint8_t *buf = avpkt->data;
1108 30900 int buf_size = avpkt->size;
1109 30900 H264Context *h = avctx->priv_data;
1110 int buf_index;
1111 int ret;
1112
1113 30900 h->flags = avctx->flags;
1114 30900 h->setup_finished = 0;
1115 30900 h->nb_slice_ctx_queued = 0;
1116
1117 30900 ff_h264_unref_picture(&h->last_pic_for_ec);
1118
1119 /* end of stream, output what is still in the buffers */
1120
2/2
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✓ Branch 1 taken 30291 times.
 30900 if (buf_size == 0)
1121 609 return send_next_delayed_frame(h, pict, got_frame, 0);
1122
1123
2/2
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✓ Branch 2 taken 30287 times.
 30291 if (av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1124 size_t side_size;
1125 4 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1126 4 ff_h264_decode_extradata(side, side_size,
1127 &h->ps, &h->is_avc, &h->nal_length_size,
1128 avctx->err_recognition, avctx);
1129 }
1130
4/10
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✗ Branch 9 not taken.
 30291 if (h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC) {
1131 ✗ if (is_avcc_extradata(buf, buf_size))
1132 ✗ return ff_h264_decode_extradata(buf, buf_size,
1133 &h->ps, &h->is_avc, &h->nal_length_size,
1134 avctx->err_recognition, avctx);
1135 }
1136
1137 30291 buf_index = decode_nal_units(h, avpkt->buf, buf, buf_size);
1138
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 30291 if (buf_index < 0)
1139 1 return AVERROR_INVALIDDATA;
1140
1141
3/4
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✗ Branch 2 not taken.
✓ Branch 3 taken 428 times.
 30290 if (!h->cur_pic_ptr && h->nal_unit_type == H264_NAL_END_SEQUENCE) {
1142 ✗ av_assert0(buf_index <= buf_size);
1143 ✗ return send_next_delayed_frame(h, pict, got_frame, buf_index);
1144 }
1145
1146
6/6
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✓ Branch 3 taken 426 times.
✓ Branch 4 taken 164 times.
✓ Branch 5 taken 28944 times.
 30290 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && (!h->cur_pic_ptr || !h->has_slice)) {
1147
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✗ Branch 3 not taken.
 590 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1148
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✓ Branch 1 taken 390 times.
 390 buf_size >= 4 && !memcmp("Q264", buf, 4))
1149 200 return buf_size;
1150 390 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1151 390 return AVERROR_INVALIDDATA;
1152 }
1153
1154
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✓ Branch 1 taken 28944 times.
 29700 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
1155
4/4
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✓ Branch 2 taken 300 times.
✓ Branch 3 taken 2 times.
 756 (h->mb_y >= h->mb_height && h->mb_height)) {
1156
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✓ Branch 2 taken 29244 times.
 29244 if ((ret = ff_h264_field_end(h, &h->slice_ctx[0], 0)) < 0)
1157 ✗ return ret;
1158
1159 /* Wait for second field. */
1160
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✓ Branch 1 taken 4283 times.
 29244 if (h->next_output_pic) {
1161 24961 ret = finalize_frame(h, pict, h->next_output_pic, got_frame);
1162
1/2
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✓ Branch 1 taken 24961 times.
 24961 if (ret < 0)
1163 ✗ return ret;
1164 }
1165 }
1166
1167
3/4
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✗ Branch 2 not taken.
✓ Branch 3 taken 4739 times.
 29700 av_assert0(pict->buf[0] || !*got_frame);
1168
1169 29700 ff_h264_unref_picture(&h->last_pic_for_ec);
1170
1171 29700 return buf_size;
1172 }
1173
1174 #define OFFSET(x) offsetof(H264Context, x)
1175 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1176 #define VDX VD | AV_OPT_FLAG_EXPORT
1177 static const AVOption h264_options[] = {
1178 { "is_avc", "is avc", OFFSET(is_avc), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VDX },
1179 { "nal_length_size", "nal_length_size", OFFSET(nal_length_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 4, VDX },
1180 { "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, VD },
1181 { "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 },
1182 { "skip_gray", "Do not return gray gap frames", OFFSET(skip_gray), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VD },
1183 { "noref_gray", "Avoid using gray gap frames as references", OFFSET(noref_gray), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, VD },
1184 { NULL },
1185 };
1186
1187 static const AVClass h264_class = {
1188 .class_name = "H264 Decoder",
1189 .item_name = av_default_item_name,
1190 .option = h264_options,
1191 .version = LIBAVUTIL_VERSION_INT,
1192 };
1193
1194 const FFCodec ff_h264_decoder = {
1195 .p.name = "h264",
1196 CODEC_LONG_NAME("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1197 .p.type = AVMEDIA_TYPE_VIDEO,
1198 .p.id = AV_CODEC_ID_H264,
1199 .priv_data_size = sizeof(H264Context),
1200 .init = h264_decode_init,
1201 .close = h264_decode_end,
1202 FF_CODEC_DECODE_CB(h264_decode_frame),
1203 .p.capabilities = AV_CODEC_CAP_DR1 |
1204 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1205 AV_CODEC_CAP_FRAME_THREADS,
1206 .hw_configs = (const AVCodecHWConfigInternal *const []) {
1207 #if CONFIG_H264_DXVA2_HWACCEL
1208 HWACCEL_DXVA2(h264),
1209 #endif
1210 #if CONFIG_H264_D3D11VA_HWACCEL
1211 HWACCEL_D3D11VA(h264),
1212 #endif
1213 #if CONFIG_H264_D3D11VA2_HWACCEL
1214 HWACCEL_D3D11VA2(h264),
1215 #endif
1216 #if CONFIG_H264_D3D12VA_HWACCEL
1217 HWACCEL_D3D12VA(h264),
1218 #endif
1219 #if CONFIG_H264_NVDEC_HWACCEL
1220 HWACCEL_NVDEC(h264),
1221 #endif
1222 #if CONFIG_H264_NVDEC_CUARRAY_HWACCEL
1223 HWACCEL_NVDEC_CUARRAY(h264),
1224 #endif
1225 #if CONFIG_H264_VAAPI_HWACCEL
1226 HWACCEL_VAAPI(h264),
1227 #endif
1228 #if CONFIG_H264_VDPAU_HWACCEL
1229 HWACCEL_VDPAU(h264),
1230 #endif
1231 #if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
1232 HWACCEL_VIDEOTOOLBOX(h264),
1233 #endif
1234 #if CONFIG_H264_VULKAN_HWACCEL
1235 HWACCEL_VULKAN(h264),
1236 #endif
1237 NULL
1238 },
1239 .caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING |
1240 FF_CODEC_CAP_INIT_CLEANUP,
1241 .flush = h264_decode_flush,
1242 UPDATE_THREAD_CONTEXT(ff_h264_update_thread_context),
1243 UPDATE_THREAD_CONTEXT_FOR_USER(ff_h264_update_thread_context_for_user),
1244 .p.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
1245 .p.priv_class = &h264_class,
1246 };
1247