FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/h264_ps.c
Date: 2024-04-20 14:10:07
Exec Total Coverage
Lines: 394 510 77.3%
Functions: 15 15 100.0%
Branches: 225 332 67.8%

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 #include "refstruct.h"
38
39 #define MIN_LOG2_MAX_FRAME_NUM 4
40
41 static const uint8_t default_scaling4[2][16] = {
42 { 6, 13, 20, 28, 13, 20, 28, 32,
43 20, 28, 32, 37, 28, 32, 37, 42 },
44 { 10, 14, 20, 24, 14, 20, 24, 27,
45 20, 24, 27, 30, 24, 27, 30, 34 }
46 };
47
48 static const uint8_t default_scaling8[2][64] = {
49 { 6, 10, 13, 16, 18, 23, 25, 27,
50 10, 11, 16, 18, 23, 25, 27, 29,
51 13, 16, 18, 23, 25, 27, 29, 31,
52 16, 18, 23, 25, 27, 29, 31, 33,
53 18, 23, 25, 27, 29, 31, 33, 36,
54 23, 25, 27, 29, 31, 33, 36, 38,
55 25, 27, 29, 31, 33, 36, 38, 40,
56 27, 29, 31, 33, 36, 38, 40, 42 },
57 { 9, 13, 15, 17, 19, 21, 22, 24,
58 13, 13, 17, 19, 21, 22, 24, 25,
59 15, 17, 19, 21, 22, 24, 25, 27,
60 17, 19, 21, 22, 24, 25, 27, 28,
61 19, 21, 22, 24, 25, 27, 28, 30,
62 21, 22, 24, 25, 27, 28, 30, 32,
63 22, 24, 25, 27, 28, 30, 32, 33,
64 24, 25, 27, 28, 30, 32, 33, 35 }
65 };
66
67 /* maximum number of MBs in the DPB for a given level */
68 static const int level_max_dpb_mbs[][2] = {
69 { 10, 396 },
70 { 11, 900 },
71 { 12, 2376 },
72 { 13, 2376 },
73 { 20, 2376 },
74 { 21, 4752 },
75 { 22, 8100 },
76 { 30, 8100 },
77 { 31, 18000 },
78 { 32, 20480 },
79 { 40, 32768 },
80 { 41, 32768 },
81 { 42, 34816 },
82 { 50, 110400 },
83 { 51, 184320 },
84 { 52, 184320 },
85 };
86
87 15117 static void remove_pps(H264ParamSets *s, int id)
88 {
89 15117 ff_refstruct_unref(&s->pps_list[id]);
90 15117 }
91
92 1102 static void remove_sps(H264ParamSets *s, int id)
93 {
94 #if 0
95 int i;
96 if (s->sps_list[id]) {
97 /* drop all PPS that depend on this SPS */
98 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
99 if (s->pps_list[i] && s->pps_list[i]->sps_id == id)
100 remove_pps(s, i);
101 }
102 #endif
103 1102 ff_refstruct_unref(&s->sps_list[id]);
104 1102 }
105
106 159 static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
107 SPS *sps)
108 {
109 int cpb_count, i;
110 159 cpb_count = get_ue_golomb_31(gb) + 1;
111
112
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159 if (cpb_count > 32U) {
113 av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
114 return AVERROR_INVALIDDATA;
115 }
116
117 159 sps->cpr_flag = 0x0;
118 159 sps->bit_rate_scale = get_bits(gb, 4);
119 159 get_bits(gb, 4); /* cpb_size_scale */
120
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318 for (i = 0; i < cpb_count; i++) {
121 159 sps->bit_rate_value[i] = get_ue_golomb_long(gb) + 1; /* bit_rate_value_minus1 + 1 */
122 159 sps->cpb_size_value[i] = get_ue_golomb_long(gb) + 1; /* cpb_size_value_minus1 + 1 */
123 159 sps->cpr_flag |= get_bits1(gb) << i;
124 }
125 159 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
126 159 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
127 159 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
128 159 sps->time_offset_length = get_bits(gb, 5);
129 159 sps->cpb_cnt = cpb_count;
130 159 return 0;
131 }
132
133 935 static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
134 SPS *sps)
135 {
136 935 ff_h2645_decode_common_vui_params(gb, &sps->vui, logctx);
137
138
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935 if (show_bits1(gb) && get_bits_left(gb) < 10) {
139 av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
140 return 0;
141 }
142
143 935 sps->timing_info_present_flag = get_bits1(gb);
144
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935 if (sps->timing_info_present_flag) {
145 846 unsigned num_units_in_tick = get_bits_long(gb, 32);
146 846 unsigned time_scale = get_bits_long(gb, 32);
147
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846 if (!num_units_in_tick || !time_scale) {
148 av_log(logctx, AV_LOG_ERROR,
149 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
150 time_scale, num_units_in_tick);
151 sps->timing_info_present_flag = 0;
152 } else {
153 846 sps->num_units_in_tick = num_units_in_tick;
154 846 sps->time_scale = time_scale;
155 }
156 846 sps->fixed_frame_rate_flag = get_bits1(gb);
157 }
158
159 935 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
160
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935 if (sps->nal_hrd_parameters_present_flag)
161
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123 if (decode_hrd_parameters(gb, logctx, sps) < 0)
162 return AVERROR_INVALIDDATA;
163 935 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
164
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935 if (sps->vcl_hrd_parameters_present_flag)
165
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36 if (decode_hrd_parameters(gb, logctx, sps) < 0)
166 return AVERROR_INVALIDDATA;
167
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935 if (sps->nal_hrd_parameters_present_flag ||
168
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812 sps->vcl_hrd_parameters_present_flag)
169 123 get_bits1(gb); /* low_delay_hrd_flag */
170 935 sps->pic_struct_present_flag = get_bits1(gb);
171
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935 if (!get_bits_left(gb))
172 return 0;
173 935 sps->bitstream_restriction_flag = get_bits1(gb);
174
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935 if (sps->bitstream_restriction_flag) {
175 769 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
176 769 get_ue_golomb_31(gb); /* max_bytes_per_pic_denom */
177 769 get_ue_golomb_31(gb); /* max_bits_per_mb_denom */
178 769 get_ue_golomb_31(gb); /* log2_max_mv_length_horizontal */
179 769 get_ue_golomb_31(gb); /* log2_max_mv_length_vertical */
180 769 sps->num_reorder_frames = get_ue_golomb_31(gb);
181 769 sps->max_dec_frame_buffering = get_ue_golomb_31(gb);
182
183
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769 if (get_bits_left(gb) < 0) {
184 2 sps->num_reorder_frames = 0;
185 2 sps->bitstream_restriction_flag = 0;
186 }
187
188
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769 if (sps->num_reorder_frames > 16U
189 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
190 av_log(logctx, AV_LOG_ERROR,
191 "Clipping illegal num_reorder_frames %d\n",
192 sps->num_reorder_frames);
193 sps->num_reorder_frames = 16;
194 return AVERROR_INVALIDDATA;
195 }
196 }
197
198 935 return 0;
199 }
200
201 2368 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
202 const uint8_t *jvt_list, const uint8_t *fallback_list,
203 uint16_t *mask, int pos)
204 {
205 2368 int i, last = 8, next = 8;
206
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2368 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
207 2368 uint16_t seq_scaling_list_present_flag = get_bits1(gb);
208 2368 *mask |= (seq_scaling_list_present_flag << pos);
209
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2368 if (!seq_scaling_list_present_flag) /* matrix not written, we use the predicted one */
210 1140 memcpy(factors, fallback_list, size * sizeof(uint8_t));
211 else
212
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33132 for (i = 0; i < size; i++) {
213
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32008 if (next) {
214 30000 int v = get_se_golomb(gb);
215
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30000 if (v < -128 || v > 127) {
216 av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
217 return AVERROR_INVALIDDATA;
218 }
219 30000 next = (last + v) & 0xff;
220 }
221
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32008 if (!i && !next) { /* matrix not written, we use the preset one */
222 104 memcpy(factors, jvt_list, size * sizeof(uint8_t));
223 104 break;
224 }
225
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31904 last = factors[scan[i]] = next ? next : last;
226 }
227 2368 return 0;
228 }
229
230 /* returns non zero if the provided SPS scaling matrix has been filled */
231 1734 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
232 const PPS *pps, int is_sps,
233 int present_flag, uint16_t *mask,
234 uint8_t(*scaling_matrix4)[16],
235 uint8_t(*scaling_matrix8)[64])
236 {
237
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1734 int fallback_sps = !is_sps && sps->scaling_matrix_present;
238 6936 const uint8_t *fallback[4] = {
239
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1734 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
240
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1734 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
241
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1734 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
242
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1734 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
243 };
244 1734 int ret = 0;
245 1734 *mask = 0x0;
246
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1734 if (present_flag) {
247 296 ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0], mask, 0); // Intra, Y
248 296 ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0], mask, 1); // Intra, Cr
249 296 ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1], mask, 2); // Intra, Cb
250 296 ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1], mask, 3); // Inter, Y
251 296 ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3], mask, 4); // Inter, Cr
252 296 ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4], mask, 5); // Inter, Cb
253
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296 if (is_sps || pps->transform_8x8_mode) {
254 296 ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2], mask, 6); // Intra, Y
255 296 ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3], mask, 7); // Inter, Y
256
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296 if (sps->chroma_format_idc == 3) {
257 ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0], mask, 8); // Intra, Cr
258 ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3], mask, 9); // Inter, Cr
259 ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1], mask, 10); // Intra, Cb
260 ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4], mask, 11); // Inter, Cb
261 }
262 }
263
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296 if (!ret)
264 296 ret = is_sps;
265 }
266
267 1734 return ret;
268 }
269
270 1049 void ff_h264_ps_uninit(H264ParamSets *ps)
271 {
272 int i;
273
274
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34617 for (i = 0; i < MAX_SPS_COUNT; i++)
275 33568 ff_refstruct_unref(&ps->sps_list[i]);
276
277
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269593 for (i = 0; i < MAX_PPS_COUNT; i++)
278 268544 ff_refstruct_unref(&ps->pps_list[i]);
279
280 1049 ff_refstruct_unref(&ps->pps);
281 1049 ps->sps = NULL;
282 1049 }
283
284 2561 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
285 H264ParamSets *ps, int ignore_truncation)
286 {
287 2561 int profile_idc, level_idc, constraint_set_flags = 0;
288 unsigned int sps_id;
289 int i, log2_max_frame_num_minus4;
290 SPS *sps;
291 int ret;
292
293 2561 sps = ff_refstruct_allocz(sizeof(*sps));
294
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2561 if (!sps)
295 return AVERROR(ENOMEM);
296
297 2561 sps->data_size = gb->buffer_end - gb->buffer;
298
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2561 if (sps->data_size > sizeof(sps->data)) {
299 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
300 sps->data_size = sizeof(sps->data);
301 }
302 2561 memcpy(sps->data, gb->buffer, sps->data_size);
303
304 // Re-add the removed stop bit (may be used by hwaccels).
305
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2561 if (!(gb->size_in_bits & 7) && sps->data_size < sizeof(sps->data))
306 1068 sps->data[sps->data_size++] = 0x80;
307
308 2561 profile_idc = get_bits(gb, 8);
309 2561 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
310 2561 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
311 2561 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
312 2561 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
313 2561 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
314 2561 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
315 2561 skip_bits(gb, 2); // reserved_zero_2bits
316 2561 level_idc = get_bits(gb, 8);
317 2561 sps_id = get_ue_golomb_31(gb);
318
319
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2561 if (sps_id >= MAX_SPS_COUNT) {
320 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
321 goto fail;
322 }
323
324 2561 sps->sps_id = sps_id;
325 2561 sps->time_offset_length = 24;
326 2561 sps->profile_idc = profile_idc;
327 2561 sps->constraint_set_flags = constraint_set_flags;
328 2561 sps->level_idc = level_idc;
329 2561 sps->vui.video_full_range_flag = -1;
330
331 2561 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
332 2561 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
333 2561 sps->scaling_matrix_present = 0;
334 2561 sps->vui.matrix_coeffs = AVCOL_SPC_UNSPECIFIED;
335
336
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2561 if (sps->profile_idc == 100 || // High profile
337
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1858 sps->profile_idc == 110 || // High10 profile
338
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1800 sps->profile_idc == 122 || // High422 profile
339
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1742 sps->profile_idc == 244 || // High444 Predictive profile
340
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1612 sps->profile_idc == 44 || // Cavlc444 profile
341
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1612 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
342
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1612 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
343
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1612 sps->profile_idc == 118 || // Stereo High profile (MVC)
344
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1612 sps->profile_idc == 128 || // Multiview High profile (MVC)
345
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1612 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
346
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1612 sps->profile_idc == 144) { // old High444 profile
347 949 sps->chroma_format_idc = get_ue_golomb_31(gb);
348
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949 if (sps->chroma_format_idc > 3U) {
349 avpriv_request_sample(avctx, "chroma_format_idc %u",
350 sps->chroma_format_idc);
351 goto fail;
352
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949 } else if (sps->chroma_format_idc == 3) {
353 126 sps->residual_color_transform_flag = get_bits1(gb);
354
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126 if (sps->residual_color_transform_flag) {
355 av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
356 goto fail;
357 }
358 }
359 949 sps->bit_depth_luma = get_ue_golomb_31(gb) + 8;
360 949 sps->bit_depth_chroma = get_ue_golomb_31(gb) + 8;
361
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949 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
362 avpriv_request_sample(avctx,
363 "Different chroma and luma bit depth");
364 goto fail;
365 }
366
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949 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
367
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949 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
368 av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
369 sps->bit_depth_luma, sps->bit_depth_chroma);
370 goto fail;
371 }
372 949 sps->transform_bypass = get_bits1(gb);
373 949 ret = decode_scaling_matrices(gb, sps, NULL, 1, get_bits1(gb),
374 949 &sps->scaling_matrix_present_mask,
375 949 sps->scaling_matrix4, sps->scaling_matrix8);
376
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949 if (ret < 0)
377 goto fail;
378 949 sps->scaling_matrix_present |= ret;
379 } else {
380 1612 sps->chroma_format_idc = 1;
381 1612 sps->bit_depth_luma = 8;
382 1612 sps->bit_depth_chroma = 8;
383 }
384
385 2561 log2_max_frame_num_minus4 = get_ue_golomb_31(gb);
386
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2561 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
387 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
388 av_log(avctx, AV_LOG_ERROR,
389 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
390 log2_max_frame_num_minus4);
391 goto fail;
392 }
393 2561 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
394
395 2561 sps->poc_type = get_ue_golomb_31(gb);
396
397
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2561 if (sps->poc_type == 0) { // FIXME #define
398 1353 unsigned t = get_ue_golomb_31(gb);
399
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1353 if (t>12) {
400 av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
401 goto fail;
402 }
403 1353 sps->log2_max_poc_lsb = t + 4;
404
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1208 } else if (sps->poc_type == 1) { // FIXME #define
405 76 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
406 76 sps->offset_for_non_ref_pic = get_se_golomb_long(gb);
407 76 sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb);
408
409
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76 if ( sps->offset_for_non_ref_pic == INT32_MIN
410
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76 || sps->offset_for_top_to_bottom_field == INT32_MIN
411 ) {
412 av_log(avctx, AV_LOG_ERROR,
413 "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
414 goto fail;
415 }
416
417 76 sps->poc_cycle_length = get_ue_golomb(gb);
418
419
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76 if ((unsigned)sps->poc_cycle_length >=
420 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
421 av_log(avctx, AV_LOG_ERROR,
422 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
423 goto fail;
424 }
425
426
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176 for (i = 0; i < sps->poc_cycle_length; i++) {
427 100 sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
428
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100 if (sps->offset_for_ref_frame[i] == INT32_MIN) {
429 av_log(avctx, AV_LOG_ERROR,
430 "offset_for_ref_frame is out of range\n");
431 goto fail;
432 }
433 }
434
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1132 } else if (sps->poc_type != 2) {
435 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
436 goto fail;
437 }
438
439 2561 sps->ref_frame_count = get_ue_golomb_31(gb);
440
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2561 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
441 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
442
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2561 if (sps->ref_frame_count > H264_MAX_DPB_FRAMES) {
443 av_log(avctx, AV_LOG_ERROR,
444 "too many reference frames %d\n", sps->ref_frame_count);
445 goto fail;
446 }
447 2561 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
448 2561 sps->mb_width = get_ue_golomb(gb) + 1;
449 2561 sps->mb_height = get_ue_golomb(gb) + 1;
450
451 2561 sps->frame_mbs_only_flag = get_bits1(gb);
452
453
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2561 if (sps->mb_height >= INT_MAX / 2U) {
454 av_log(avctx, AV_LOG_ERROR, "height overflow\n");
455 goto fail;
456 }
457 2561 sps->mb_height *= 2 - sps->frame_mbs_only_flag;
458
459
2/2
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2561 if (!sps->frame_mbs_only_flag)
460 529 sps->mb_aff = get_bits1(gb);
461 else
462 2032 sps->mb_aff = 0;
463
464
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2561 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
465
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5122 (unsigned)sps->mb_height >= INT_MAX / 16 ||
466 2561 av_image_check_size(16 * sps->mb_width,
467 2561 16 * sps->mb_height, 0, avctx)) {
468 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
469 goto fail;
470 }
471
472 2561 sps->direct_8x8_inference_flag = get_bits1(gb);
473
474 2561 sps->crop = get_bits1(gb);
475
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2561 if (sps->crop) {
476 370 unsigned int crop_left = get_ue_golomb(gb);
477 370 unsigned int crop_right = get_ue_golomb(gb);
478 370 unsigned int crop_top = get_ue_golomb(gb);
479 370 unsigned int crop_bottom = get_ue_golomb(gb);
480 370 int width = 16 * sps->mb_width;
481 370 int height = 16 * sps->mb_height;
482
483
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370 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
484 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
485 "values are l:%d r:%d t:%d b:%d\n",
486 crop_left, crop_right, crop_top, crop_bottom);
487
488 sps->crop_left =
489 sps->crop_right =
490 sps->crop_top =
491 sps->crop_bottom = 0;
492 } else {
493 370 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
494 740 int hsub = (sps->chroma_format_idc == 1 ||
495
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370 sps->chroma_format_idc == 2) ? 1 : 0;
496 370 int step_x = 1 << hsub;
497 370 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
498
499
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370 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
500
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370 crop_right > (unsigned)INT_MAX / 4 / step_x ||
501
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370 crop_top > (unsigned)INT_MAX / 4 / step_y ||
502
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370 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
503
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370 (crop_left + crop_right ) * step_x >= width ||
504
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370 (crop_top + crop_bottom) * step_y >= height
505 ) {
506 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);
507 goto fail;
508 }
509
510 370 sps->crop_left = crop_left * step_x;
511 370 sps->crop_right = crop_right * step_x;
512 370 sps->crop_top = crop_top * step_y;
513 370 sps->crop_bottom = crop_bottom * step_y;
514 }
515 } else {
516 2191 sps->crop_left =
517 2191 sps->crop_right =
518 2191 sps->crop_top =
519 2191 sps->crop_bottom =
520 2191 sps->crop = 0;
521 }
522
523 2561 sps->vui_parameters_present_flag = get_bits1(gb);
524
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2561 if (sps->vui_parameters_present_flag) {
525 935 ret = decode_vui_parameters(gb, avctx, sps);
526
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935 if (ret < 0)
527 goto fail;
528 }
529
530
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✓ Branch 2 taken 2556 times.
2561 if (get_bits_left(gb) < 0) {
531 10 av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
532
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5 &ps->overread_warning_printed[sps->vui_parameters_present_flag],
533
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5 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
534
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5 if (!ignore_truncation)
535 5 goto fail;
536 }
537
538 /* if the maximum delay is not stored in the SPS, derive it based on the
539 * level */
540
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2556 if (!sps->bitstream_restriction_flag &&
541
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1789 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
542 1730 sps->num_reorder_frames = H264_MAX_DPB_FRAMES - 1;
543
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9513 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
544
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9513 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
545 1730 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
546 sps->num_reorder_frames);
547 1730 break;
548 }
549 }
550 }
551
552
2/2
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2556 if (!sps->vui.sar.den)
553 1626 sps->vui.sar.den = 1;
554
555
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2556 if (avctx->debug & FF_DEBUG_PICT_INFO) {
556 static const char csp[4][5] = { "Gray", "420", "422", "444" };
557 av_log(avctx, AV_LOG_DEBUG,
558 "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",
559 sps_id, sps->profile_idc, sps->level_idc,
560 sps->poc_type,
561 sps->ref_frame_count,
562 sps->mb_width, sps->mb_height,
563 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
564 sps->direct_8x8_inference_flag ? "8B8" : "",
565 sps->crop_left, sps->crop_right,
566 sps->crop_top, sps->crop_bottom,
567 sps->vui_parameters_present_flag ? "VUI" : "",
568 csp[sps->chroma_format_idc],
569 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
570 sps->timing_info_present_flag ? sps->time_scale : 0,
571 sps->bit_depth_luma,
572 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
573 );
574 }
575
576 /* check if this is a repeat of an already parsed SPS, then keep the
577 * original one.
578 * otherwise drop all PPSes that depend on it */
579
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2556 if (ps->sps_list[sps_id] &&
580
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1526 !memcmp(ps->sps_list[sps_id], sps, sizeof(*sps))) {
581 1454 ff_refstruct_unref(&sps);
582 } else {
583 1102 remove_sps(ps, sps_id);
584 1102 ps->sps_list[sps_id] = sps;
585 }
586
587 2556 return 0;
588
589 5 fail:
590 5 ff_refstruct_unref(&sps);
591 5 return AVERROR_INVALIDDATA;
592 }
593
594 772 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
595 {
596 int i, j, q, x;
597 772 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
598
599
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5404 for (i = 0; i < 6; i++) {
600 4632 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
601
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6542 for (j = 0; j < i; j++)
602
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5227 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
603 64 * sizeof(uint8_t))) {
604 3317 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
605 3317 break;
606 }
607
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4632 if (j < i)
608 3317 continue;
609
610
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71141 for (q = 0; q < max_qp + 1; q++) {
611 69826 int shift = ff_h264_quant_div6[q];
612 69826 int idx = ff_h264_quant_rem6[q];
613
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4538690 for (x = 0; x < 64; x++)
614 4468864 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
615 4468864 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
616 4468864 pps->scaling_matrix8[i][x]) << shift;
617 }
618 }
619 772 }
620
621 15117 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
622 {
623 int i, j, q, x;
624 15117 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
625
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105819 for (i = 0; i < 6; i++) {
626 90702 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
627
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94888 for (j = 0; j < i; j++)
628
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78951 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
629 16 * sizeof(uint8_t))) {
630 74765 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
631 74765 break;
632 }
633
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90702 if (j < i)
634 74765 continue;
635
636
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846473 for (q = 0; q < max_qp + 1; q++) {
637 830536 int shift = ff_h264_quant_div6[q] + 2;
638 830536 int idx = ff_h264_quant_rem6[q];
639
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14119112 for (x = 0; x < 16; x++)
640 13288576 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
641 13288576 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
642 13288576 pps->scaling_matrix4[i][x]) << shift;
643 }
644 }
645 15117 }
646
647 15117 static void init_dequant_tables(PPS *pps, const SPS *sps)
648 {
649 int i, x;
650 15117 init_dequant4_coeff_table(pps, sps);
651 15117 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
652
653
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15117 if (pps->transform_8x8_mode)
654 772 init_dequant8_coeff_table(pps, sps);
655
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15117 if (sps->transform_bypass) {
656
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154 for (i = 0; i < 6; i++)
657
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2244 for (x = 0; x < 16; x++)
658 2112 pps->dequant4_coeff[i][0][x] = 1 << 6;
659
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22 if (pps->transform_8x8_mode)
660
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147 for (i = 0; i < 6; i++)
661
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8190 for (x = 0; x < 64; x++)
662 8064 pps->dequant8_coeff[i][0][x] = 1 << 6;
663 }
664 15117 }
665
666 30234 static void build_qp_table(PPS *pps, int t, int index, const int depth)
667 {
668 int i;
669 30234 const int max_qp = 51 + 6 * (depth - 8);
670
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1605618 for (i = 0; i < max_qp + 1; i++)
671 1575384 pps->chroma_qp_table[t][i] =
672 1575384 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
673 30234 }
674
675 785 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
676 {
677 785 int profile_idc = sps->profile_idc;
678
679
5/6
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785 if ((profile_idc == 66 || profile_idc == 77 ||
680
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13 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
681 av_log(logctx, AV_LOG_VERBOSE,
682 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
683 return 0;
684 }
685
686 785 return 1;
687 }
688
689 15131 static void pps_free(FFRefStructOpaque unused, void *obj)
690 {
691 15131 PPS *pps = obj;
692
693 15131 ff_refstruct_unref(&pps->sps);
694 15131 }
695
696 15131 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
697 H264ParamSets *ps, int bit_length)
698 {
699 const SPS *sps;
700 15131 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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15131 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 15131 pps = ff_refstruct_alloc_ext(sizeof(*pps), 0, NULL, pps_free);
712
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15131 if (!pps)
713 return AVERROR(ENOMEM);
714
715 15131 pps->data_size = gb->buffer_end - gb->buffer;
716
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15131 if (pps->data_size > sizeof(pps->data)) {
717 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
718 "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
719 pps->data_size, sizeof(pps->data));
720 pps->data_size = sizeof(pps->data);
721 }
722 15131 memcpy(pps->data, gb->buffer, pps->data_size);
723
724 // Re-add the removed stop bit (may be used by hwaccels).
725
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15131 if (!(bit_length & 7) && pps->data_size < sizeof(pps->data))
726 10405 pps->data[pps->data_size++] = 0x80;
727
728 15131 pps->pps_id = pps_id;
729 15131 pps->sps_id = get_ue_golomb_31(gb);
730
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15131 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
731
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15131 !ps->sps_list[pps->sps_id]) {
732 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
733 ret = AVERROR_INVALIDDATA;
734 goto fail;
735 }
736 15131 pps->sps = ff_refstruct_ref_c(ps->sps_list[pps->sps_id]);
737 15131 sps = pps->sps;
738
739
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15131 if (sps->bit_depth_luma > 14) {
740 av_log(avctx, AV_LOG_ERROR,
741 "Invalid luma bit depth=%d\n",
742 sps->bit_depth_luma);
743 ret = AVERROR_INVALIDDATA;
744 goto fail;
745
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15131 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
746 avpriv_report_missing_feature(avctx,
747 "Unimplemented luma bit depth=%d",
748 sps->bit_depth_luma);
749 ret = AVERROR_PATCHWELCOME;
750 goto fail;
751 }
752
753 15131 pps->cabac = get_bits1(gb);
754 15131 pps->pic_order_present = get_bits1(gb);
755 15131 pps->slice_group_count = get_ue_golomb(gb) + 1;
756
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15131 if (pps->slice_group_count > 1) {
757 14 pps->mb_slice_group_map_type = get_ue_golomb(gb);
758 14 avpriv_report_missing_feature(avctx, "FMO");
759 14 ret = AVERROR_PATCHWELCOME;
760 14 goto fail;
761 }
762 15117 pps->ref_count[0] = get_ue_golomb(gb) + 1;
763 15117 pps->ref_count[1] = get_ue_golomb(gb) + 1;
764
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15117 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
765 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
766 ret = AVERROR_INVALIDDATA;
767 goto fail;
768 }
769
770 15117 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
771
772 15117 pps->weighted_pred = get_bits1(gb);
773 15117 pps->weighted_bipred_idc = get_bits(gb, 2);
774 15117 pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
775 15117 pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
776 15117 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
777
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15117 if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
778 ret = AVERROR_INVALIDDATA;
779 goto fail;
780 }
781
782 15117 pps->deblocking_filter_parameters_present = get_bits1(gb);
783 15117 pps->constrained_intra_pred = get_bits1(gb);
784 15117 pps->redundant_pic_cnt_present = get_bits1(gb);
785
786 15117 pps->transform_8x8_mode = 0;
787 15117 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
788 sizeof(pps->scaling_matrix4));
789 15117 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
790 sizeof(pps->scaling_matrix8));
791
792 15117 bits_left = bit_length - get_bits_count(gb);
793
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15117 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
794 785 pps->transform_8x8_mode = get_bits1(gb);
795 785 pps->pic_scaling_matrix_present_flag = get_bits1(gb);
796 785 ret = decode_scaling_matrices(gb, sps, pps, 0,
797 785 pps->pic_scaling_matrix_present_flag,
798 785 &pps->pic_scaling_matrix_present_mask,
799 785 pps->scaling_matrix4, pps->scaling_matrix8);
800
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785 if (ret < 0)
801 goto fail;
802 // second_chroma_qp_index_offset
803 785 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
804
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785 if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
805 ret = AVERROR_INVALIDDATA;
806 goto fail;
807 }
808 } else {
809 14332 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
810 }
811
812 15117 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
813 15117 sps->bit_depth_luma);
814 15117 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
815 15117 sps->bit_depth_luma);
816
817 15117 init_dequant_tables(pps, sps);
818
819
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15117 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
820 76 pps->chroma_qp_diff = 1;
821
822
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15117 if (avctx->debug & FF_DEBUG_PICT_INFO) {
823 av_log(avctx, AV_LOG_DEBUG,
824 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
825 pps_id, pps->sps_id,
826 pps->cabac ? "CABAC" : "CAVLC",
827 pps->slice_group_count,
828 pps->ref_count[0], pps->ref_count[1],
829 pps->weighted_pred ? "weighted" : "",
830 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
831 pps->deblocking_filter_parameters_present ? "LPAR" : "",
832 pps->constrained_intra_pred ? "CONSTR" : "",
833 pps->redundant_pic_cnt_present ? "REDU" : "",
834 pps->transform_8x8_mode ? "8x8DCT" : "");
835 }
836
837 15117 remove_pps(ps, pps_id);
838 15117 ps->pps_list[pps_id] = pps;
839
840 15117 return 0;
841
842 14 fail:
843 14 ff_refstruct_unref(&pps);
844 14 return ret;
845 }
846