FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/h264_ps.c
Date: 2023-03-31 03:41:15
Exec Total Coverage
Lines: 392 501 78.2%
Functions: 15 15 100.0%
Branches: 227 336 67.6%

Line Branch Exec Source
1 /*
2 * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
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 parameter set decoding.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #include <inttypes.h>
29
30 #include "libavutil/imgutils.h"
31 #include "mathops.h"
32 #include "avcodec.h"
33 #include "h264data.h"
34 #include "h2645_vui.h"
35 #include "h264_ps.h"
36 #include "golomb.h"
37
38 #define MIN_LOG2_MAX_FRAME_NUM 4
39
40 static const uint8_t default_scaling4[2][16] = {
41 { 6, 13, 20, 28, 13, 20, 28, 32,
42 20, 28, 32, 37, 28, 32, 37, 42 },
43 { 10, 14, 20, 24, 14, 20, 24, 27,
44 20, 24, 27, 30, 24, 27, 30, 34 }
45 };
46
47 static const uint8_t default_scaling8[2][64] = {
48 { 6, 10, 13, 16, 18, 23, 25, 27,
49 10, 11, 16, 18, 23, 25, 27, 29,
50 13, 16, 18, 23, 25, 27, 29, 31,
51 16, 18, 23, 25, 27, 29, 31, 33,
52 18, 23, 25, 27, 29, 31, 33, 36,
53 23, 25, 27, 29, 31, 33, 36, 38,
54 25, 27, 29, 31, 33, 36, 38, 40,
55 27, 29, 31, 33, 36, 38, 40, 42 },
56 { 9, 13, 15, 17, 19, 21, 22, 24,
57 13, 13, 17, 19, 21, 22, 24, 25,
58 15, 17, 19, 21, 22, 24, 25, 27,
59 17, 19, 21, 22, 24, 25, 27, 28,
60 19, 21, 22, 24, 25, 27, 28, 30,
61 21, 22, 24, 25, 27, 28, 30, 32,
62 22, 24, 25, 27, 28, 30, 32, 33,
63 24, 25, 27, 28, 30, 32, 33, 35 }
64 };
65
66 /* maximum number of MBs in the DPB for a given level */
67 static const int level_max_dpb_mbs[][2] = {
68 { 10, 396 },
69 { 11, 900 },
70 { 12, 2376 },
71 { 13, 2376 },
72 { 20, 2376 },
73 { 21, 4752 },
74 { 22, 8100 },
75 { 30, 8100 },
76 { 31, 18000 },
77 { 32, 20480 },
78 { 40, 32768 },
79 { 41, 32768 },
80 { 42, 34816 },
81 { 50, 110400 },
82 { 51, 184320 },
83 { 52, 184320 },
84 };
85
86 14997 static void remove_pps(H264ParamSets *s, int id)
87 {
88 14997 av_buffer_unref(&s->pps_list[id]);
89 14997 }
90
91 1052 static void remove_sps(H264ParamSets *s, int id)
92 {
93 #if 0
94 int i;
95 if (s->sps_list[id]) {
96 /* drop all PPS that depend on this SPS */
97 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
98 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
99 remove_pps(s, i);
100 }
101 #endif
102 1052 av_buffer_unref(&s->sps_list[id]);
103 1052 }
104
105 138 static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
106 SPS *sps)
107 {
108 int cpb_count, i;
109 138 cpb_count = get_ue_golomb_31(gb) + 1;
110
111
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138 if (cpb_count > 32U) {
112 av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
113 return AVERROR_INVALIDDATA;
114 }
115
116 138 get_bits(gb, 4); /* bit_rate_scale */
117 138 get_bits(gb, 4); /* cpb_size_scale */
118
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276 for (i = 0; i < cpb_count; i++) {
119 138 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
120 138 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
121 138 get_bits1(gb); /* cbr_flag */
122 }
123 138 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
124 138 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
125 138 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
126 138 sps->time_offset_length = get_bits(gb, 5);
127 138 sps->cpb_cnt = cpb_count;
128 138 return 0;
129 }
130
131 815 static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
132 SPS *sps)
133 {
134 815 ff_h2645_decode_common_vui_params(gb, &sps->vui, logctx);
135
136
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815 if (show_bits1(gb) && get_bits_left(gb) < 10) {
137 av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
138 return 0;
139 }
140
141 815 sps->timing_info_present_flag = get_bits1(gb);
142
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815 if (sps->timing_info_present_flag) {
143 739 unsigned num_units_in_tick = get_bits_long(gb, 32);
144 739 unsigned time_scale = get_bits_long(gb, 32);
145
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739 if (!num_units_in_tick || !time_scale) {
146 av_log(logctx, AV_LOG_ERROR,
147 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
148 time_scale, num_units_in_tick);
149 sps->timing_info_present_flag = 0;
150 } else {
151 739 sps->num_units_in_tick = num_units_in_tick;
152 739 sps->time_scale = time_scale;
153 }
154 739 sps->fixed_frame_rate_flag = get_bits1(gb);
155 }
156
157 815 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
158
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815 if (sps->nal_hrd_parameters_present_flag)
159
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102 if (decode_hrd_parameters(gb, logctx, sps) < 0)
160 return AVERROR_INVALIDDATA;
161 815 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
162
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815 if (sps->vcl_hrd_parameters_present_flag)
163
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36 if (decode_hrd_parameters(gb, logctx, sps) < 0)
164 return AVERROR_INVALIDDATA;
165
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815 if (sps->nal_hrd_parameters_present_flag ||
166
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713 sps->vcl_hrd_parameters_present_flag)
167 102 get_bits1(gb); /* low_delay_hrd_flag */
168 815 sps->pic_struct_present_flag = get_bits1(gb);
169
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815 if (!get_bits_left(gb))
170 return 0;
171 815 sps->bitstream_restriction_flag = get_bits1(gb);
172
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815 if (sps->bitstream_restriction_flag) {
173 662 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
174 662 get_ue_golomb_31(gb); /* max_bytes_per_pic_denom */
175 662 get_ue_golomb_31(gb); /* max_bits_per_mb_denom */
176 662 get_ue_golomb_31(gb); /* log2_max_mv_length_horizontal */
177 662 get_ue_golomb_31(gb); /* log2_max_mv_length_vertical */
178 662 sps->num_reorder_frames = get_ue_golomb_31(gb);
179 662 get_ue_golomb_31(gb); /*max_dec_frame_buffering*/
180
181
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662 if (get_bits_left(gb) < 0) {
182 2 sps->num_reorder_frames = 0;
183 2 sps->bitstream_restriction_flag = 0;
184 }
185
186
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662 if (sps->num_reorder_frames > 16U
187 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
188 av_log(logctx, AV_LOG_ERROR,
189 "Clipping illegal num_reorder_frames %d\n",
190 sps->num_reorder_frames);
191 sps->num_reorder_frames = 16;
192 return AVERROR_INVALIDDATA;
193 }
194 }
195
196 815 return 0;
197 }
198
199 2320 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
200 const uint8_t *jvt_list,
201 const uint8_t *fallback_list)
202 {
203 2320 int i, last = 8, next = 8;
204
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2320 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
205
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2320 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
206 1140 memcpy(factors, fallback_list, size * sizeof(uint8_t));
207 else
208
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31740 for (i = 0; i < size; i++) {
209
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30664 if (next) {
210 28656 int v = get_se_golomb(gb);
211
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28656 if (v < -128 || v > 127) {
212 av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
213 return AVERROR_INVALIDDATA;
214 }
215 28656 next = (last + v) & 0xff;
216 }
217
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30664 if (!i && !next) { /* matrix not written, we use the preset one */
218 104 memcpy(factors, jvt_list, size * sizeof(uint8_t));
219 104 break;
220 }
221
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30560 last = factors[scan[i]] = next ? next : last;
222 }
223 2320 return 0;
224 }
225
226 /* returns non zero if the provided SPS scaling matrix has been filled */
227 1562 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
228 const PPS *pps, int is_sps,
229 uint8_t(*scaling_matrix4)[16],
230 uint8_t(*scaling_matrix8)[64])
231 {
232
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1562 int fallback_sps = !is_sps && sps->scaling_matrix_present;
233 6248 const uint8_t *fallback[4] = {
234
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1562 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
235
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1562 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
236
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1562 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
237
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1562 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
238 };
239 1562 int ret = 0;
240
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1562 if (get_bits1(gb)) {
241 290 ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
242 290 ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
243 290 ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
244 290 ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
245 290 ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
246 290 ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
247
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290 if (is_sps || pps->transform_8x8_mode) {
248 290 ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
249 290 ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
250
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290 if (sps->chroma_format_idc == 3) {
251 ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
252 ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
253 ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
254 ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
255 }
256 }
257
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290 if (!ret)
258 290 ret = is_sps;
259 }
260
261 1562 return ret;
262 }
263
264 1002 void ff_h264_ps_uninit(H264ParamSets *ps)
265 {
266 int i;
267
268
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33066 for (i = 0; i < MAX_SPS_COUNT; i++)
269 32064 av_buffer_unref(&ps->sps_list[i]);
270
271
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257514 for (i = 0; i < MAX_PPS_COUNT; i++)
272 256512 av_buffer_unref(&ps->pps_list[i]);
273
274 1002 av_buffer_unref(&ps->pps_ref);
275
276 1002 ps->pps = NULL;
277 1002 ps->sps = NULL;
278 1002 }
279
280 2441 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
281 H264ParamSets *ps, int ignore_truncation)
282 {
283 AVBufferRef *sps_buf;
284 2441 int profile_idc, level_idc, constraint_set_flags = 0;
285 unsigned int sps_id;
286 int i, log2_max_frame_num_minus4;
287 SPS *sps;
288 int ret;
289
290 2441 sps_buf = av_buffer_allocz(sizeof(*sps));
291
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2441 if (!sps_buf)
292 return AVERROR(ENOMEM);
293 2441 sps = (SPS*)sps_buf->data;
294
295 2441 sps->data_size = gb->buffer_end - gb->buffer;
296
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2441 if (sps->data_size > sizeof(sps->data)) {
297 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
298 sps->data_size = sizeof(sps->data);
299 }
300 2441 memcpy(sps->data, gb->buffer, sps->data_size);
301
302 // Re-add the removed stop bit (may be used by hwaccels).
303
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2441 if (!(gb->size_in_bits & 7) && sps->data_size < sizeof(sps->data))
304 981 sps->data[sps->data_size++] = 0x80;
305
306 2441 profile_idc = get_bits(gb, 8);
307 2441 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
308 2441 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
309 2441 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
310 2441 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
311 2441 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
312 2441 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
313 2441 skip_bits(gb, 2); // reserved_zero_2bits
314 2441 level_idc = get_bits(gb, 8);
315 2441 sps_id = get_ue_golomb_31(gb);
316
317
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2441 if (sps_id >= MAX_SPS_COUNT) {
318 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
319 goto fail;
320 }
321
322 2441 sps->sps_id = sps_id;
323 2441 sps->time_offset_length = 24;
324 2441 sps->profile_idc = profile_idc;
325 2441 sps->constraint_set_flags = constraint_set_flags;
326 2441 sps->level_idc = level_idc;
327 2441 sps->vui.video_full_range_flag = -1;
328
329 2441 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
330 2441 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
331 2441 sps->scaling_matrix_present = 0;
332 2441 sps->vui.matrix_coeffs = AVCOL_SPC_UNSPECIFIED;
333
334
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2441 if (sps->profile_idc == 100 || // High profile
335
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1833 sps->profile_idc == 110 || // High10 profile
336
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1785 sps->profile_idc == 122 || // High422 profile
337
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1727 sps->profile_idc == 244 || // High444 Predictive profile
338
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1597 sps->profile_idc == 44 || // Cavlc444 profile
339
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1597 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
340
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1597 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
341
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1597 sps->profile_idc == 118 || // Stereo High profile (MVC)
342
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1597 sps->profile_idc == 128 || // Multiview High profile (MVC)
343
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1597 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
344
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1597 sps->profile_idc == 144) { // old High444 profile
345 844 sps->chroma_format_idc = get_ue_golomb_31(gb);
346
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844 if (sps->chroma_format_idc > 3U) {
347 avpriv_request_sample(avctx, "chroma_format_idc %u",
348 sps->chroma_format_idc);
349 goto fail;
350
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844 } else if (sps->chroma_format_idc == 3) {
351 126 sps->residual_color_transform_flag = get_bits1(gb);
352
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126 if (sps->residual_color_transform_flag) {
353 av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
354 goto fail;
355 }
356 }
357 844 sps->bit_depth_luma = get_ue_golomb_31(gb) + 8;
358 844 sps->bit_depth_chroma = get_ue_golomb_31(gb) + 8;
359
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844 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
360 avpriv_request_sample(avctx,
361 "Different chroma and luma bit depth");
362 goto fail;
363 }
364
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844 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
365
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844 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
366 av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
367 sps->bit_depth_luma, sps->bit_depth_chroma);
368 goto fail;
369 }
370 844 sps->transform_bypass = get_bits1(gb);
371 844 ret = decode_scaling_matrices(gb, sps, NULL, 1,
372 844 sps->scaling_matrix4, sps->scaling_matrix8);
373
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844 if (ret < 0)
374 goto fail;
375 844 sps->scaling_matrix_present |= ret;
376 } else {
377 1597 sps->chroma_format_idc = 1;
378 1597 sps->bit_depth_luma = 8;
379 1597 sps->bit_depth_chroma = 8;
380 }
381
382 2441 log2_max_frame_num_minus4 = get_ue_golomb_31(gb);
383
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2441 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
384 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
385 av_log(avctx, AV_LOG_ERROR,
386 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
387 log2_max_frame_num_minus4);
388 goto fail;
389 }
390 2441 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
391
392 2441 sps->poc_type = get_ue_golomb_31(gb);
393
394
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2441 if (sps->poc_type == 0) { // FIXME #define
395 1233 unsigned t = get_ue_golomb_31(gb);
396
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1233 if (t>12) {
397 av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
398 goto fail;
399 }
400 1233 sps->log2_max_poc_lsb = t + 4;
401
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1208 } else if (sps->poc_type == 1) { // FIXME #define
402 76 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
403 76 sps->offset_for_non_ref_pic = get_se_golomb_long(gb);
404 76 sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb);
405
406
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76 if ( sps->offset_for_non_ref_pic == INT32_MIN
407
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76 || sps->offset_for_top_to_bottom_field == INT32_MIN
408 ) {
409 av_log(avctx, AV_LOG_ERROR,
410 "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
411 goto fail;
412 }
413
414 76 sps->poc_cycle_length = get_ue_golomb(gb);
415
416
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76 if ((unsigned)sps->poc_cycle_length >=
417 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
418 av_log(avctx, AV_LOG_ERROR,
419 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
420 goto fail;
421 }
422
423
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176 for (i = 0; i < sps->poc_cycle_length; i++) {
424 100 sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
425
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100 if (sps->offset_for_ref_frame[i] == INT32_MIN) {
426 av_log(avctx, AV_LOG_ERROR,
427 "offset_for_ref_frame is out of range\n");
428 goto fail;
429 }
430 }
431
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1132 } else if (sps->poc_type != 2) {
432 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
433 goto fail;
434 }
435
436 2441 sps->ref_frame_count = get_ue_golomb_31(gb);
437
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2441 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
438 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
439
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2441 if (sps->ref_frame_count > H264_MAX_DPB_FRAMES) {
440 av_log(avctx, AV_LOG_ERROR,
441 "too many reference frames %d\n", sps->ref_frame_count);
442 goto fail;
443 }
444 2441 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
445 2441 sps->mb_width = get_ue_golomb(gb) + 1;
446 2441 sps->mb_height = get_ue_golomb(gb) + 1;
447
448 2441 sps->frame_mbs_only_flag = get_bits1(gb);
449
450
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2441 if (sps->mb_height >= INT_MAX / 2U) {
451 av_log(avctx, AV_LOG_ERROR, "height overflow\n");
452 goto fail;
453 }
454 2441 sps->mb_height *= 2 - sps->frame_mbs_only_flag;
455
456
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✓ Branch 1 taken 1920 times.
2441 if (!sps->frame_mbs_only_flag)
457 521 sps->mb_aff = get_bits1(gb);
458 else
459 1920 sps->mb_aff = 0;
460
461
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2441 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
462
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4882 (unsigned)sps->mb_height >= INT_MAX / 16 ||
463 2441 av_image_check_size(16 * sps->mb_width,
464 2441 16 * sps->mb_height, 0, avctx)) {
465 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
466 goto fail;
467 }
468
469 2441 sps->direct_8x8_inference_flag = get_bits1(gb);
470
471 2441 sps->crop = get_bits1(gb);
472
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2441 if (sps->crop) {
473 342 unsigned int crop_left = get_ue_golomb(gb);
474 342 unsigned int crop_right = get_ue_golomb(gb);
475 342 unsigned int crop_top = get_ue_golomb(gb);
476 342 unsigned int crop_bottom = get_ue_golomb(gb);
477 342 int width = 16 * sps->mb_width;
478 342 int height = 16 * sps->mb_height;
479
480
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342 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
481 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
482 "values are l:%d r:%d t:%d b:%d\n",
483 crop_left, crop_right, crop_top, crop_bottom);
484
485 sps->crop_left =
486 sps->crop_right =
487 sps->crop_top =
488 sps->crop_bottom = 0;
489 } else {
490 342 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
491 684 int hsub = (sps->chroma_format_idc == 1 ||
492
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342 sps->chroma_format_idc == 2) ? 1 : 0;
493 342 int step_x = 1 << hsub;
494 342 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
495
496
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342 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
497
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342 crop_right > (unsigned)INT_MAX / 4 / step_x ||
498
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342 crop_top > (unsigned)INT_MAX / 4 / step_y ||
499
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342 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
500
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342 (crop_left + crop_right ) * step_x >= width ||
501
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342 (crop_top + crop_bottom) * step_y >= height
502 ) {
503 av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
504 goto fail;
505 }
506
507 342 sps->crop_left = crop_left * step_x;
508 342 sps->crop_right = crop_right * step_x;
509 342 sps->crop_top = crop_top * step_y;
510 342 sps->crop_bottom = crop_bottom * step_y;
511 }
512 } else {
513 2099 sps->crop_left =
514 2099 sps->crop_right =
515 2099 sps->crop_top =
516 2099 sps->crop_bottom =
517 2099 sps->crop = 0;
518 }
519
520 2441 sps->vui_parameters_present_flag = get_bits1(gb);
521
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2441 if (sps->vui_parameters_present_flag) {
522 815 int ret = decode_vui_parameters(gb, avctx, sps);
523
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815 if (ret < 0)
524 goto fail;
525 }
526
527
2/2
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✓ Branch 2 taken 2436 times.
2441 if (get_bits_left(gb) < 0) {
528 10 av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
529
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5 &ps->overread_warning_printed[sps->vui_parameters_present_flag],
530
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5 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
531
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5 if (!ignore_truncation)
532 5 goto fail;
533 }
534
535 /* if the maximum delay is not stored in the SPS, derive it based on the
536 * level */
537
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2436 if (!sps->bitstream_restriction_flag &&
538
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1776 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
539 1717 sps->num_reorder_frames = H264_MAX_DPB_FRAMES - 1;
540
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9444 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
541
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9444 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
542 1717 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
543 sps->num_reorder_frames);
544 1717 break;
545 }
546 }
547 }
548
549
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2436 if (!sps->vui.sar.den)
550 1626 sps->vui.sar.den = 1;
551
552
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2436 if (avctx->debug & FF_DEBUG_PICT_INFO) {
553 static const char csp[4][5] = { "Gray", "420", "422", "444" };
554 av_log(avctx, AV_LOG_DEBUG,
555 "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32" b%d reo:%d\n",
556 sps_id, sps->profile_idc, sps->level_idc,
557 sps->poc_type,
558 sps->ref_frame_count,
559 sps->mb_width, sps->mb_height,
560 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
561 sps->direct_8x8_inference_flag ? "8B8" : "",
562 sps->crop_left, sps->crop_right,
563 sps->crop_top, sps->crop_bottom,
564 sps->vui_parameters_present_flag ? "VUI" : "",
565 csp[sps->chroma_format_idc],
566 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
567 sps->timing_info_present_flag ? sps->time_scale : 0,
568 sps->bit_depth_luma,
569 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
570 );
571 }
572
573 /* check if this is a repeat of an already parsed SPS, then keep the
574 * original one.
575 * otherwise drop all PPSes that depend on it */
576
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2436 if (ps->sps_list[sps_id] &&
577
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1453 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
578 1384 av_buffer_unref(&sps_buf);
579 } else {
580 1052 remove_sps(ps, sps_id);
581 1052 ps->sps_list[sps_id] = sps_buf;
582 }
583
584 2436 return 0;
585
586 5 fail:
587 5 av_buffer_unref(&sps_buf);
588 5 return AVERROR_INVALIDDATA;
589 }
590
591 705 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
592 {
593 int i, j, q, x;
594 705 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
595
596
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4935 for (i = 0; i < 6; i++) {
597 4230 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
598
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6098 for (j = 0; j < i; j++)
599
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✓ Branch 1 taken 1868 times.
4862 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
600 64 * sizeof(uint8_t))) {
601 2994 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
602 2994 break;
603 }
604
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4230 if (j < i)
605 2994 continue;
606
607
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66834 for (q = 0; q < max_qp + 1; q++) {
608 65598 int shift = ff_h264_quant_div6[q];
609 65598 int idx = ff_h264_quant_rem6[q];
610
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4263870 for (x = 0; x < 64; x++)
611 4198272 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
612 4198272 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
613 4198272 pps->scaling_matrix8[i][x]) << shift;
614 }
615 }
616 705 }
617
618 14997 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
619 {
620 int i, j, q, x;
621 14997 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
622
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104979 for (i = 0; i < 6; i++) {
623 89982 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
624
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94168 for (j = 0; j < i; j++)
625
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78351 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
626 16 * sizeof(uint8_t))) {
627 74165 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
628 74165 break;
629 }
630
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89982 if (j < i)
631 74165 continue;
632
633
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839993 for (q = 0; q < max_qp + 1; q++) {
634 824176 int shift = ff_h264_quant_div6[q] + 2;
635 824176 int idx = ff_h264_quant_rem6[q];
636
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14010992 for (x = 0; x < 16; x++)
637 13186816 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
638 13186816 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
639 13186816 pps->scaling_matrix4[i][x]) << shift;
640 }
641 }
642 14997 }
643
644 14997 static void init_dequant_tables(PPS *pps, const SPS *sps)
645 {
646 int i, x;
647 14997 init_dequant4_coeff_table(pps, sps);
648 14997 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
649
650
2/2
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14997 if (pps->transform_8x8_mode)
651 705 init_dequant8_coeff_table(pps, sps);
652
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14997 if (sps->transform_bypass) {
653
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154 for (i = 0; i < 6; i++)
654
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2244 for (x = 0; x < 16; x++)
655 2112 pps->dequant4_coeff[i][0][x] = 1 << 6;
656
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22 if (pps->transform_8x8_mode)
657
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147 for (i = 0; i < 6; i++)
658
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8190 for (x = 0; x < 64; x++)
659 8064 pps->dequant8_coeff[i][0][x] = 1 << 6;
660 }
661 14997 }
662
663 29994 static void build_qp_table(PPS *pps, int t, int index, const int depth)
664 {
665 int i;
666 29994 const int max_qp = 51 + 6 * (depth - 8);
667
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1592658 for (i = 0; i < max_qp + 1; i++)
668 1562664 pps->chroma_qp_table[t][i] =
669 1562664 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
670 29994 }
671
672 718 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
673 {
674 718 int profile_idc = sps->profile_idc;
675
676
5/6
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718 if ((profile_idc == 66 || profile_idc == 77 ||
677
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13 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
678 av_log(logctx, AV_LOG_VERBOSE,
679 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
680 return 0;
681 }
682
683 718 return 1;
684 }
685
686 15011 static void pps_free(void *opaque, uint8_t *data)
687 {
688 15011 PPS *pps = (PPS*)data;
689
690 15011 av_buffer_unref(&pps->sps_ref);
691
692 15011 av_freep(&data);
693 15011 }
694
695 15011 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
696 H264ParamSets *ps, int bit_length)
697 {
698 AVBufferRef *pps_buf;
699 const SPS *sps;
700 15011 unsigned int pps_id = get_ue_golomb(gb);
701 PPS *pps;
702 int qp_bd_offset;
703 int bits_left;
704 int ret;
705
706
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15011 if (pps_id >= MAX_PPS_COUNT) {
707 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
708 return AVERROR_INVALIDDATA;
709 }
710
711 15011 pps = av_mallocz(sizeof(*pps));
712
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15011 if (!pps)
713 return AVERROR(ENOMEM);
714 15011 pps_buf = av_buffer_create((uint8_t*)pps, sizeof(*pps),
715 pps_free, NULL, 0);
716
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15011 if (!pps_buf) {
717 av_freep(&pps);
718 return AVERROR(ENOMEM);
719 }
720
721 15011 pps->data_size = gb->buffer_end - gb->buffer;
722
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15011 if (pps->data_size > sizeof(pps->data)) {
723 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
724 "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
725 pps->data_size, sizeof(pps->data));
726 pps->data_size = sizeof(pps->data);
727 }
728 15011 memcpy(pps->data, gb->buffer, pps->data_size);
729
730 // Re-add the removed stop bit (may be used by hwaccels).
731
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15011 if (!(bit_length & 7) && pps->data_size < sizeof(pps->data))
732 10359 pps->data[pps->data_size++] = 0x80;
733
734 15011 pps->sps_id = get_ue_golomb_31(gb);
735
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15011 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
736
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15011 !ps->sps_list[pps->sps_id]) {
737 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
738 ret = AVERROR_INVALIDDATA;
739 goto fail;
740 }
741 15011 pps->sps_ref = av_buffer_ref(ps->sps_list[pps->sps_id]);
742
1/2
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15011 if (!pps->sps_ref) {
743 ret = AVERROR(ENOMEM);
744 goto fail;
745 }
746 15011 pps->sps = (const SPS*)pps->sps_ref->data;
747 15011 sps = pps->sps;
748
749
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15011 if (sps->bit_depth_luma > 14) {
750 av_log(avctx, AV_LOG_ERROR,
751 "Invalid luma bit depth=%d\n",
752 sps->bit_depth_luma);
753 ret = AVERROR_INVALIDDATA;
754 goto fail;
755
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15011 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
756 avpriv_report_missing_feature(avctx,
757 "Unimplemented luma bit depth=%d",
758 sps->bit_depth_luma);
759 ret = AVERROR_PATCHWELCOME;
760 goto fail;
761 }
762
763 15011 pps->cabac = get_bits1(gb);
764 15011 pps->pic_order_present = get_bits1(gb);
765 15011 pps->slice_group_count = get_ue_golomb(gb) + 1;
766
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15011 if (pps->slice_group_count > 1) {
767 14 pps->mb_slice_group_map_type = get_ue_golomb(gb);
768 14 avpriv_report_missing_feature(avctx, "FMO");
769 14 ret = AVERROR_PATCHWELCOME;
770 14 goto fail;
771 }
772 14997 pps->ref_count[0] = get_ue_golomb(gb) + 1;
773 14997 pps->ref_count[1] = get_ue_golomb(gb) + 1;
774
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14997 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
775 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
776 ret = AVERROR_INVALIDDATA;
777 goto fail;
778 }
779
780 14997 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
781
782 14997 pps->weighted_pred = get_bits1(gb);
783 14997 pps->weighted_bipred_idc = get_bits(gb, 2);
784 14997 pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
785 14997 pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
786 14997 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
787
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14997 if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
788 ret = AVERROR_INVALIDDATA;
789 goto fail;
790 }
791
792 14997 pps->deblocking_filter_parameters_present = get_bits1(gb);
793 14997 pps->constrained_intra_pred = get_bits1(gb);
794 14997 pps->redundant_pic_cnt_present = get_bits1(gb);
795
796 14997 pps->transform_8x8_mode = 0;
797 14997 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
798 sizeof(pps->scaling_matrix4));
799 14997 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
800 sizeof(pps->scaling_matrix8));
801
802 14997 bits_left = bit_length - get_bits_count(gb);
803
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14997 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
804 718 pps->transform_8x8_mode = get_bits1(gb);
805 718 ret = decode_scaling_matrices(gb, sps, pps, 0,
806 718 pps->scaling_matrix4, pps->scaling_matrix8);
807
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718 if (ret < 0)
808 goto fail;
809 // second_chroma_qp_index_offset
810 718 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
811
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718 if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
812 ret = AVERROR_INVALIDDATA;
813 goto fail;
814 }
815 } else {
816 14279 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
817 }
818
819 14997 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
820 14997 sps->bit_depth_luma);
821 14997 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
822 14997 sps->bit_depth_luma);
823
824 14997 init_dequant_tables(pps, sps);
825
826
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14997 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
827 76 pps->chroma_qp_diff = 1;
828
829
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14997 if (avctx->debug & FF_DEBUG_PICT_INFO) {
830 av_log(avctx, AV_LOG_DEBUG,
831 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
832 pps_id, pps->sps_id,
833 pps->cabac ? "CABAC" : "CAVLC",
834 pps->slice_group_count,
835 pps->ref_count[0], pps->ref_count[1],
836 pps->weighted_pred ? "weighted" : "",
837 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
838 pps->deblocking_filter_parameters_present ? "LPAR" : "",
839 pps->constrained_intra_pred ? "CONSTR" : "",
840 pps->redundant_pic_cnt_present ? "REDU" : "",
841 pps->transform_8x8_mode ? "8x8DCT" : "");
842 }
843
844 14997 remove_pps(ps, pps_id);
845 14997 ps->pps_list[pps_id] = pps_buf;
846
847 14997 return 0;
848
849 14 fail:
850 14 av_buffer_unref(&pps_buf);
851 14 return ret;
852 }
853