FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/h264_ps.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 415 529 78.4%
Branches: 237 348 68.1%

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 "internal.h"
32 #include "mathops.h"
33 #include "avcodec.h"
34 #include "h264data.h"
35 #include "h264_ps.h"
36 #include "golomb.h"
37
38 #define MIN_LOG2_MAX_FRAME_NUM 4
39
40 #define EXTENDED_SAR 255
41
42 static const uint8_t default_scaling4[2][16] = {
43 { 6, 13, 20, 28, 13, 20, 28, 32,
44 20, 28, 32, 37, 28, 32, 37, 42 },
45 { 10, 14, 20, 24, 14, 20, 24, 27,
46 20, 24, 27, 30, 24, 27, 30, 34 }
47 };
48
49 static const uint8_t default_scaling8[2][64] = {
50 { 6, 10, 13, 16, 18, 23, 25, 27,
51 10, 11, 16, 18, 23, 25, 27, 29,
52 13, 16, 18, 23, 25, 27, 29, 31,
53 16, 18, 23, 25, 27, 29, 31, 33,
54 18, 23, 25, 27, 29, 31, 33, 36,
55 23, 25, 27, 29, 31, 33, 36, 38,
56 25, 27, 29, 31, 33, 36, 38, 40,
57 27, 29, 31, 33, 36, 38, 40, 42 },
58 { 9, 13, 15, 17, 19, 21, 22, 24,
59 13, 13, 17, 19, 21, 22, 24, 25,
60 15, 17, 19, 21, 22, 24, 25, 27,
61 17, 19, 21, 22, 24, 25, 27, 28,
62 19, 21, 22, 24, 25, 27, 28, 30,
63 21, 22, 24, 25, 27, 28, 30, 32,
64 22, 24, 25, 27, 28, 30, 32, 33,
65 24, 25, 27, 28, 30, 32, 33, 35 }
66 };
67
68 /* maximum number of MBs in the DPB for a given level */
69 static const int level_max_dpb_mbs[][2] = {
70 { 10, 396 },
71 { 11, 900 },
72 { 12, 2376 },
73 { 13, 2376 },
74 { 20, 2376 },
75 { 21, 4752 },
76 { 22, 8100 },
77 { 30, 8100 },
78 { 31, 18000 },
79 { 32, 20480 },
80 { 40, 32768 },
81 { 41, 32768 },
82 { 42, 34816 },
83 { 50, 110400 },
84 { 51, 184320 },
85 { 52, 184320 },
86 };
87
88 14042 static void remove_pps(H264ParamSets *s, int id)
89 {
90 14042 av_buffer_unref(&s->pps_list[id]);
91 14042 }
92
93 985 static void remove_sps(H264ParamSets *s, int id)
94 {
95 #if 0
96 int i;
97 if (s->sps_list[id]) {
98 /* drop all PPS that depend on this SPS */
99 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
100 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
101 remove_pps(s, i);
102 }
103 #endif
104 985 av_buffer_unref(&s->sps_list[id]);
105 985 }
106
107 133 static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
108 SPS *sps)
109 {
110 int cpb_count, i;
111 133 cpb_count = get_ue_golomb_31(gb) + 1;
112
113
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133 if (cpb_count > 32U) {
114 av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
115 return AVERROR_INVALIDDATA;
116 }
117
118 133 get_bits(gb, 4); /* bit_rate_scale */
119 133 get_bits(gb, 4); /* cpb_size_scale */
120
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266 for (i = 0; i < cpb_count; i++) {
121 133 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
122 133 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
123 133 get_bits1(gb); /* cbr_flag */
124 }
125 133 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
126 133 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
127 133 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
128 133 sps->time_offset_length = get_bits(gb, 5);
129 133 sps->cpb_cnt = cpb_count;
130 133 return 0;
131 }
132
133 777 static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
134 SPS *sps)
135 {
136 int aspect_ratio_info_present_flag;
137 unsigned int aspect_ratio_idc;
138
139 777 aspect_ratio_info_present_flag = get_bits1(gb);
140
141
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777 if (aspect_ratio_info_present_flag) {
142 382 aspect_ratio_idc = get_bits(gb, 8);
143
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382 if (aspect_ratio_idc == EXTENDED_SAR) {
144 40 sps->sar.num = get_bits(gb, 16);
145 40 sps->sar.den = get_bits(gb, 16);
146
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342 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
147 342 sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
148 } else {
149 av_log(logctx, AV_LOG_ERROR, "illegal aspect ratio\n");
150 return AVERROR_INVALIDDATA;
151 }
152 } else {
153 395 sps->sar.num =
154 395 sps->sar.den = 0;
155 }
156
157
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777 if (get_bits1(gb)) /* overscan_info_present_flag */
158 68 get_bits1(gb); /* overscan_appropriate_flag */
159
160 777 sps->video_signal_type_present_flag = get_bits1(gb);
161
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777 if (sps->video_signal_type_present_flag) {
162 131 get_bits(gb, 3); /* video_format */
163 131 sps->full_range = get_bits1(gb); /* video_full_range_flag */
164
165 131 sps->colour_description_present_flag = get_bits1(gb);
166
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131 if (sps->colour_description_present_flag) {
167 110 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
168 110 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
169 110 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
170
171 // Set invalid values to "unspecified"
172
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110 if (!av_color_primaries_name(sps->color_primaries))
173 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
174
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110 if (!av_color_transfer_name(sps->color_trc))
175 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
176
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110 if (!av_color_space_name(sps->colorspace))
177 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
178 }
179 }
180
181 /* chroma_location_info_present_flag */
182
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777 if (get_bits1(gb)) {
183 /* chroma_sample_location_type_top_field */
184 91 sps->chroma_location = get_ue_golomb_31(gb) + 1;
185 91 get_ue_golomb_31(gb); /* chroma_sample_location_type_bottom_field */
186 } else
187 686 sps->chroma_location = AVCHROMA_LOC_LEFT;
188
189
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777 if (show_bits1(gb) && get_bits_left(gb) < 10) {
190 av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
191 return 0;
192 }
193
194 777 sps->timing_info_present_flag = get_bits1(gb);
195
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777 if (sps->timing_info_present_flag) {
196 709 unsigned num_units_in_tick = get_bits_long(gb, 32);
197 709 unsigned time_scale = get_bits_long(gb, 32);
198
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709 if (!num_units_in_tick || !time_scale) {
199 av_log(logctx, AV_LOG_ERROR,
200 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
201 time_scale, num_units_in_tick);
202 sps->timing_info_present_flag = 0;
203 } else {
204 709 sps->num_units_in_tick = num_units_in_tick;
205 709 sps->time_scale = time_scale;
206 }
207 709 sps->fixed_frame_rate_flag = get_bits1(gb);
208 }
209
210 777 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
211
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777 if (sps->nal_hrd_parameters_present_flag)
212
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97 if (decode_hrd_parameters(gb, logctx, sps) < 0)
213 return AVERROR_INVALIDDATA;
214 777 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
215
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777 if (sps->vcl_hrd_parameters_present_flag)
216
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36 if (decode_hrd_parameters(gb, logctx, sps) < 0)
217 return AVERROR_INVALIDDATA;
218
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777 if (sps->nal_hrd_parameters_present_flag ||
219
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680 sps->vcl_hrd_parameters_present_flag)
220 97 get_bits1(gb); /* low_delay_hrd_flag */
221 777 sps->pic_struct_present_flag = get_bits1(gb);
222
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777 if (!get_bits_left(gb))
223 return 0;
224 777 sps->bitstream_restriction_flag = get_bits1(gb);
225
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777 if (sps->bitstream_restriction_flag) {
226 642 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
227 642 get_ue_golomb_31(gb); /* max_bytes_per_pic_denom */
228 642 get_ue_golomb_31(gb); /* max_bits_per_mb_denom */
229 642 get_ue_golomb_31(gb); /* log2_max_mv_length_horizontal */
230 642 get_ue_golomb_31(gb); /* log2_max_mv_length_vertical */
231 642 sps->num_reorder_frames = get_ue_golomb_31(gb);
232 642 get_ue_golomb_31(gb); /*max_dec_frame_buffering*/
233
234
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642 if (get_bits_left(gb) < 0) {
235 2 sps->num_reorder_frames = 0;
236 2 sps->bitstream_restriction_flag = 0;
237 }
238
239
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642 if (sps->num_reorder_frames > 16U
240 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
241 av_log(logctx, AV_LOG_ERROR,
242 "Clipping illegal num_reorder_frames %d\n",
243 sps->num_reorder_frames);
244 sps->num_reorder_frames = 16;
245 return AVERROR_INVALIDDATA;
246 }
247 }
248
249 777 return 0;
250 }
251
252 2320 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
253 const uint8_t *jvt_list,
254 const uint8_t *fallback_list)
255 {
256 2320 int i, last = 8, next = 8;
257
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2320 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
258
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2320 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
259 1140 memcpy(factors, fallback_list, size * sizeof(uint8_t));
260 else
261
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31740 for (i = 0; i < size; i++) {
262
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30664 if (next) {
263 28656 int v = get_se_golomb(gb);
264
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28656 if (v < -128 || v > 127) {
265 av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
266 return AVERROR_INVALIDDATA;
267 }
268 28656 next = (last + v) & 0xff;
269 }
270
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30664 if (!i && !next) { /* matrix not written, we use the preset one */
271 104 memcpy(factors, jvt_list, size * sizeof(uint8_t));
272 104 break;
273 }
274
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30560 last = factors[scan[i]] = next ? next : last;
275 }
276 2320 return 0;
277 }
278
279 /* returns non zero if the provided SPS scaling matrix has been filled */
280 1523 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
281 const PPS *pps, int is_sps,
282 uint8_t(*scaling_matrix4)[16],
283 uint8_t(*scaling_matrix8)[64])
284 {
285
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1523 int fallback_sps = !is_sps && sps->scaling_matrix_present;
286 6092 const uint8_t *fallback[4] = {
287
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1523 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
288
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1523 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
289
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1523 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
290
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1523 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
291 };
292 1523 int ret = 0;
293
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1523 if (get_bits1(gb)) {
294 290 ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
295 290 ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
296 290 ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
297 290 ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
298 290 ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
299 290 ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
300
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290 if (is_sps || pps->transform_8x8_mode) {
301 290 ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
302 290 ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
303
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290 if (sps->chroma_format_idc == 3) {
304 ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
305 ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
306 ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
307 ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
308 }
309 }
310
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290 if (!ret)
311 290 ret = is_sps;
312 }
313
314 1523 return ret;
315 }
316
317 963 void ff_h264_ps_uninit(H264ParamSets *ps)
318 {
319 int i;
320
321
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31779 for (i = 0; i < MAX_SPS_COUNT; i++)
322 30816 av_buffer_unref(&ps->sps_list[i]);
323
324
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247491 for (i = 0; i < MAX_PPS_COUNT; i++)
325 246528 av_buffer_unref(&ps->pps_list[i]);
326
327 963 av_buffer_unref(&ps->pps_ref);
328
329 963 ps->pps = NULL;
330 963 ps->sps = NULL;
331 963 }
332
333 2340 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
334 H264ParamSets *ps, int ignore_truncation)
335 {
336 AVBufferRef *sps_buf;
337 2340 int profile_idc, level_idc, constraint_set_flags = 0;
338 unsigned int sps_id;
339 int i, log2_max_frame_num_minus4;
340 SPS *sps;
341 int ret;
342
343 2340 sps_buf = av_buffer_allocz(sizeof(*sps));
344
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2340 if (!sps_buf)
345 return AVERROR(ENOMEM);
346 2340 sps = (SPS*)sps_buf->data;
347
348 2340 sps->data_size = gb->buffer_end - gb->buffer;
349
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2340 if (sps->data_size > sizeof(sps->data)) {
350 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
351 sps->data_size = sizeof(sps->data);
352 }
353 2340 memcpy(sps->data, gb->buffer, sps->data_size);
354
355 2340 profile_idc = get_bits(gb, 8);
356 2340 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
357 2340 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
358 2340 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
359 2340 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
360 2340 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
361 2340 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
362 2340 skip_bits(gb, 2); // reserved_zero_2bits
363 2340 level_idc = get_bits(gb, 8);
364 2340 sps_id = get_ue_golomb_31(gb);
365
366
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2340 if (sps_id >= MAX_SPS_COUNT) {
367 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
368 goto fail;
369 }
370
371 2340 sps->sps_id = sps_id;
372 2340 sps->time_offset_length = 24;
373 2340 sps->profile_idc = profile_idc;
374 2340 sps->constraint_set_flags = constraint_set_flags;
375 2340 sps->level_idc = level_idc;
376 2340 sps->full_range = -1;
377
378 2340 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
379 2340 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
380 2340 sps->scaling_matrix_present = 0;
381 2340 sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
382
383
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2340 if (sps->profile_idc == 100 || // High profile
384
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1747 sps->profile_idc == 110 || // High10 profile
385
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1702 sps->profile_idc == 122 || // High422 profile
386
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1644 sps->profile_idc == 244 || // High444 Predictive profile
387
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1517 sps->profile_idc == 44 || // Cavlc444 profile
388
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1517 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
389
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1517 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
390
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1517 sps->profile_idc == 118 || // Stereo High profile (MVC)
391
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1517 sps->profile_idc == 128 || // Multiview High profile (MVC)
392
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1517 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
393
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1517 sps->profile_idc == 144) { // old High444 profile
394 823 sps->chroma_format_idc = get_ue_golomb_31(gb);
395
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823 if (sps->chroma_format_idc > 3U) {
396 avpriv_request_sample(avctx, "chroma_format_idc %u",
397 sps->chroma_format_idc);
398 goto fail;
399
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823 } else if (sps->chroma_format_idc == 3) {
400 123 sps->residual_color_transform_flag = get_bits1(gb);
401
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123 if (sps->residual_color_transform_flag) {
402 av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
403 goto fail;
404 }
405 }
406 823 sps->bit_depth_luma = get_ue_golomb_31(gb) + 8;
407 823 sps->bit_depth_chroma = get_ue_golomb_31(gb) + 8;
408
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823 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
409 avpriv_request_sample(avctx,
410 "Different chroma and luma bit depth");
411 goto fail;
412 }
413
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823 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
414
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823 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
415 av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
416 sps->bit_depth_luma, sps->bit_depth_chroma);
417 goto fail;
418 }
419 823 sps->transform_bypass = get_bits1(gb);
420 823 ret = decode_scaling_matrices(gb, sps, NULL, 1,
421 823 sps->scaling_matrix4, sps->scaling_matrix8);
422
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823 if (ret < 0)
423 goto fail;
424 823 sps->scaling_matrix_present |= ret;
425 } else {
426 1517 sps->chroma_format_idc = 1;
427 1517 sps->bit_depth_luma = 8;
428 1517 sps->bit_depth_chroma = 8;
429 }
430
431 2340 log2_max_frame_num_minus4 = get_ue_golomb_31(gb);
432
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2340 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
433 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
434 av_log(avctx, AV_LOG_ERROR,
435 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
436 log2_max_frame_num_minus4);
437 goto fail;
438 }
439 2340 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
440
441 2340 sps->poc_type = get_ue_golomb_31(gb);
442
443
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2340 if (sps->poc_type == 0) { // FIXME #define
444 1210 unsigned t = get_ue_golomb_31(gb);
445
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1210 if (t>12) {
446 av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
447 goto fail;
448 }
449 1210 sps->log2_max_poc_lsb = t + 4;
450
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1130 } else if (sps->poc_type == 1) { // FIXME #define
451 76 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
452 76 sps->offset_for_non_ref_pic = get_se_golomb_long(gb);
453 76 sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb);
454
455
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76 if ( sps->offset_for_non_ref_pic == INT32_MIN
456
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76 || sps->offset_for_top_to_bottom_field == INT32_MIN
457 ) {
458 av_log(avctx, AV_LOG_ERROR,
459 "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
460 goto fail;
461 }
462
463 76 sps->poc_cycle_length = get_ue_golomb(gb);
464
465
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76 if ((unsigned)sps->poc_cycle_length >=
466 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
467 av_log(avctx, AV_LOG_ERROR,
468 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
469 goto fail;
470 }
471
472
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176 for (i = 0; i < sps->poc_cycle_length; i++) {
473 100 sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
474
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100 if (sps->offset_for_ref_frame[i] == INT32_MIN) {
475 av_log(avctx, AV_LOG_ERROR,
476 "offset_for_ref_frame is out of range\n");
477 goto fail;
478 }
479 }
480
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1054 } else if (sps->poc_type != 2) {
481 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
482 goto fail;
483 }
484
485 2340 sps->ref_frame_count = get_ue_golomb_31(gb);
486
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2340 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
487 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
488
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2340 if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
489 av_log(avctx, AV_LOG_ERROR,
490 "too many reference frames %d\n", sps->ref_frame_count);
491 goto fail;
492 }
493 2340 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
494 2340 sps->mb_width = get_ue_golomb(gb) + 1;
495 2340 sps->mb_height = get_ue_golomb(gb) + 1;
496
497 2340 sps->frame_mbs_only_flag = get_bits1(gb);
498
499
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2340 if (sps->mb_height >= INT_MAX / 2U) {
500 av_log(avctx, AV_LOG_ERROR, "height overflow\n");
501 goto fail;
502 }
503 2340 sps->mb_height *= 2 - sps->frame_mbs_only_flag;
504
505
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2340 if (!sps->frame_mbs_only_flag)
506 511 sps->mb_aff = get_bits1(gb);
507 else
508 1829 sps->mb_aff = 0;
509
510
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2340 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
511
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4680 (unsigned)sps->mb_height >= INT_MAX / 16 ||
512 2340 av_image_check_size(16 * sps->mb_width,
513 2340 16 * sps->mb_height, 0, avctx)) {
514 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
515 goto fail;
516 }
517
518 2340 sps->direct_8x8_inference_flag = get_bits1(gb);
519
520 #ifndef ALLOW_INTERLACE
521 if (sps->mb_aff)
522 av_log(avctx, AV_LOG_ERROR,
523 "MBAFF support not included; enable it at compile-time.\n");
524 #endif
525 2340 sps->crop = get_bits1(gb);
526
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2340 if (sps->crop) {
527 312 unsigned int crop_left = get_ue_golomb(gb);
528 312 unsigned int crop_right = get_ue_golomb(gb);
529 312 unsigned int crop_top = get_ue_golomb(gb);
530 312 unsigned int crop_bottom = get_ue_golomb(gb);
531 312 int width = 16 * sps->mb_width;
532 312 int height = 16 * sps->mb_height;
533
534
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312 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
535 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
536 "values are l:%d r:%d t:%d b:%d\n",
537 crop_left, crop_right, crop_top, crop_bottom);
538
539 sps->crop_left =
540 sps->crop_right =
541 sps->crop_top =
542 sps->crop_bottom = 0;
543 } else {
544 312 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
545 624 int hsub = (sps->chroma_format_idc == 1 ||
546
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312 sps->chroma_format_idc == 2) ? 1 : 0;
547 312 int step_x = 1 << hsub;
548 312 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
549
550
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312 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
551
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312 crop_right > (unsigned)INT_MAX / 4 / step_x ||
552
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312 crop_top > (unsigned)INT_MAX / 4 / step_y ||
553
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312 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
554
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312 (crop_left + crop_right ) * step_x >= width ||
555
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312 (crop_top + crop_bottom) * step_y >= height
556 ) {
557 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);
558 goto fail;
559 }
560
561 312 sps->crop_left = crop_left * step_x;
562 312 sps->crop_right = crop_right * step_x;
563 312 sps->crop_top = crop_top * step_y;
564 312 sps->crop_bottom = crop_bottom * step_y;
565 }
566 } else {
567 2028 sps->crop_left =
568 2028 sps->crop_right =
569 2028 sps->crop_top =
570 2028 sps->crop_bottom =
571 2028 sps->crop = 0;
572 }
573
574 2340 sps->vui_parameters_present_flag = get_bits1(gb);
575
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2340 if (sps->vui_parameters_present_flag) {
576 777 int ret = decode_vui_parameters(gb, avctx, sps);
577
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777 if (ret < 0)
578 goto fail;
579 }
580
581
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2340 if (get_bits_left(gb) < 0) {
582 10 av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
583
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5 &ps->overread_warning_printed[sps->vui_parameters_present_flag],
584
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5 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
585
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5 if (!ignore_truncation)
586 5 goto fail;
587 }
588
589 /* if the maximum delay is not stored in the SPS, derive it based on the
590 * level */
591
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2335 if (!sps->bitstream_restriction_flag &&
592
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1695 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
593 1636 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
594
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9063 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
595
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9063 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
596 1636 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
597 sps->num_reorder_frames);
598 1636 break;
599 }
600 }
601 }
602
603
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2335 if (!sps->sar.den)
604 1955 sps->sar.den = 1;
605
606
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2335 if (avctx->debug & FF_DEBUG_PICT_INFO) {
607 static const char csp[4][5] = { "Gray", "420", "422", "444" };
608 av_log(avctx, AV_LOG_DEBUG,
609 "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",
610 sps_id, sps->profile_idc, sps->level_idc,
611 sps->poc_type,
612 sps->ref_frame_count,
613 sps->mb_width, sps->mb_height,
614 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
615 sps->direct_8x8_inference_flag ? "8B8" : "",
616 sps->crop_left, sps->crop_right,
617 sps->crop_top, sps->crop_bottom,
618 sps->vui_parameters_present_flag ? "VUI" : "",
619 csp[sps->chroma_format_idc],
620 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
621 sps->timing_info_present_flag ? sps->time_scale : 0,
622 sps->bit_depth_luma,
623 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
624 );
625 }
626
627 /* check if this is a repeat of an already parsed SPS, then keep the
628 * original one.
629 * otherwise drop all PPSes that depend on it */
630
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2335 if (ps->sps_list[sps_id] &&
631
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1381 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
632 1350 av_buffer_unref(&sps_buf);
633 } else {
634 985 remove_sps(ps, sps_id);
635 985 ps->sps_list[sps_id] = sps_buf;
636 }
637
638 2335 return 0;
639
640 5 fail:
641 5 av_buffer_unref(&sps_buf);
642 5 return AVERROR_INVALIDDATA;
643 }
644
645 687 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
646 {
647 int i, j, q, x;
648 687 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
649
650
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4809 for (i = 0; i < 6; i++) {
651 4122 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
652
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5990 for (j = 0; j < i; j++)
653
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4772 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
654 64 * sizeof(uint8_t))) {
655 2904 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
656 2904 break;
657 }
658
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4122 if (j < i)
659 2904 continue;
660
661
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65844 for (q = 0; q < max_qp + 1; q++) {
662 64626 int shift = ff_h264_quant_div6[q];
663 64626 int idx = ff_h264_quant_rem6[q];
664
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4200690 for (x = 0; x < 64; x++)
665 4136064 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
666 4136064 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
667 4136064 pps->scaling_matrix8[i][x]) << shift;
668 }
669 }
670 687 }
671
672 14042 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
673 {
674 int i, j, q, x;
675 14042 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
676
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98294 for (i = 0; i < 6; i++) {
677 84252 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
678
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88438 for (j = 0; j < i; j++)
679
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73576 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
680 16 * sizeof(uint8_t))) {
681 69390 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
682 69390 break;
683 }
684
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84252 if (j < i)
685 69390 continue;
686
687
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789342 for (q = 0; q < max_qp + 1; q++) {
688 774480 int shift = ff_h264_quant_div6[q] + 2;
689 774480 int idx = ff_h264_quant_rem6[q];
690
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13166160 for (x = 0; x < 16; x++)
691 12391680 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
692 12391680 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
693 12391680 pps->scaling_matrix4[i][x]) << shift;
694 }
695 }
696 14042 }
697
698 14042 static void init_dequant_tables(PPS *pps, const SPS *sps)
699 {
700 int i, x;
701 14042 init_dequant4_coeff_table(pps, sps);
702 14042 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
703
704
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14042 if (pps->transform_8x8_mode)
705 687 init_dequant8_coeff_table(pps, sps);
706
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14042 if (sps->transform_bypass) {
707
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133 for (i = 0; i < 6; i++)
708
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1938 for (x = 0; x < 16; x++)
709 1824 pps->dequant4_coeff[i][0][x] = 1 << 6;
710
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19 if (pps->transform_8x8_mode)
711
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126 for (i = 0; i < 6; i++)
712
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7020 for (x = 0; x < 64; x++)
713 6912 pps->dequant8_coeff[i][0][x] = 1 << 6;
714 }
715 14042 }
716
717 28084 static void build_qp_table(PPS *pps, int t, int index, const int depth)
718 {
719 int i;
720 28084 const int max_qp = 51 + 6 * (depth - 8);
721
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1491356 for (i = 0; i < max_qp + 1; i++)
722 1463272 pps->chroma_qp_table[t][i] =
723 1463272 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
724 28084 }
725
726 700 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
727 {
728 700 int profile_idc = sps->profile_idc;
729
730
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700 if ((profile_idc == 66 || profile_idc == 77 ||
731
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13 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
732 av_log(logctx, AV_LOG_VERBOSE,
733 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
734 return 0;
735 }
736
737 700 return 1;
738 }
739
740 14056 static void pps_free(void *opaque, uint8_t *data)
741 {
742 14056 PPS *pps = (PPS*)data;
743
744 14056 av_buffer_unref(&pps->sps_ref);
745
746 14056 av_freep(&data);
747 14056 }
748
749 14056 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
750 H264ParamSets *ps, int bit_length)
751 {
752 AVBufferRef *pps_buf;
753 const SPS *sps;
754 14056 unsigned int pps_id = get_ue_golomb(gb);
755 PPS *pps;
756 int qp_bd_offset;
757 int bits_left;
758 int ret;
759
760
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14056 if (pps_id >= MAX_PPS_COUNT) {
761 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
762 return AVERROR_INVALIDDATA;
763 }
764
765 14056 pps = av_mallocz(sizeof(*pps));
766
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14056 if (!pps)
767 return AVERROR(ENOMEM);
768 14056 pps_buf = av_buffer_create((uint8_t*)pps, sizeof(*pps),
769 pps_free, NULL, 0);
770
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14056 if (!pps_buf) {
771 av_freep(&pps);
772 return AVERROR(ENOMEM);
773 }
774
775 14056 pps->data_size = gb->buffer_end - gb->buffer;
776
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14056 if (pps->data_size > sizeof(pps->data)) {
777 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
778 "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
779 pps->data_size, sizeof(pps->data));
780 pps->data_size = sizeof(pps->data);
781 }
782 14056 memcpy(pps->data, gb->buffer, pps->data_size);
783
784 14056 pps->sps_id = get_ue_golomb_31(gb);
785
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14056 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
786
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14056 !ps->sps_list[pps->sps_id]) {
787 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
788 ret = AVERROR_INVALIDDATA;
789 goto fail;
790 }
791 14056 pps->sps_ref = av_buffer_ref(ps->sps_list[pps->sps_id]);
792
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14056 if (!pps->sps_ref) {
793 ret = AVERROR(ENOMEM);
794 goto fail;
795 }
796 14056 pps->sps = (const SPS*)pps->sps_ref->data;
797 14056 sps = pps->sps;
798
799
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14056 if (sps->bit_depth_luma > 14) {
800 av_log(avctx, AV_LOG_ERROR,
801 "Invalid luma bit depth=%d\n",
802 sps->bit_depth_luma);
803 ret = AVERROR_INVALIDDATA;
804 goto fail;
805
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14056 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
806 avpriv_report_missing_feature(avctx,
807 "Unimplemented luma bit depth=%d",
808 sps->bit_depth_luma);
809 ret = AVERROR_PATCHWELCOME;
810 goto fail;
811 }
812
813 14056 pps->cabac = get_bits1(gb);
814 14056 pps->pic_order_present = get_bits1(gb);
815 14056 pps->slice_group_count = get_ue_golomb(gb) + 1;
816
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14056 if (pps->slice_group_count > 1) {
817 14 pps->mb_slice_group_map_type = get_ue_golomb(gb);
818 14 avpriv_report_missing_feature(avctx, "FMO");
819 14 ret = AVERROR_PATCHWELCOME;
820 14 goto fail;
821 }
822 14042 pps->ref_count[0] = get_ue_golomb(gb) + 1;
823 14042 pps->ref_count[1] = get_ue_golomb(gb) + 1;
824
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14042 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
825 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
826 ret = AVERROR_INVALIDDATA;
827 goto fail;
828 }
829
830 14042 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
831
832 14042 pps->weighted_pred = get_bits1(gb);
833 14042 pps->weighted_bipred_idc = get_bits(gb, 2);
834 14042 pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
835 14042 pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
836 14042 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
837
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14042 if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
838 ret = AVERROR_INVALIDDATA;
839 goto fail;
840 }
841
842 14042 pps->deblocking_filter_parameters_present = get_bits1(gb);
843 14042 pps->constrained_intra_pred = get_bits1(gb);
844 14042 pps->redundant_pic_cnt_present = get_bits1(gb);
845
846 14042 pps->transform_8x8_mode = 0;
847 14042 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
848 sizeof(pps->scaling_matrix4));
849 14042 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
850 sizeof(pps->scaling_matrix8));
851
852 14042 bits_left = bit_length - get_bits_count(gb);
853
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14042 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
854 700 pps->transform_8x8_mode = get_bits1(gb);
855 700 ret = decode_scaling_matrices(gb, sps, pps, 0,
856 700 pps->scaling_matrix4, pps->scaling_matrix8);
857
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700 if (ret < 0)
858 goto fail;
859 // second_chroma_qp_index_offset
860 700 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
861
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700 if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
862 ret = AVERROR_INVALIDDATA;
863 goto fail;
864 }
865 } else {
866 13342 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
867 }
868
869 14042 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
870 14042 sps->bit_depth_luma);
871 14042 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
872 14042 sps->bit_depth_luma);
873
874 14042 init_dequant_tables(pps, sps);
875
876
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14042 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
877 76 pps->chroma_qp_diff = 1;
878
879
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14042 if (avctx->debug & FF_DEBUG_PICT_INFO) {
880 av_log(avctx, AV_LOG_DEBUG,
881 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
882 pps_id, pps->sps_id,
883 pps->cabac ? "CABAC" : "CAVLC",
884 pps->slice_group_count,
885 pps->ref_count[0], pps->ref_count[1],
886 pps->weighted_pred ? "weighted" : "",
887 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
888 pps->deblocking_filter_parameters_present ? "LPAR" : "",
889 pps->constrained_intra_pred ? "CONSTR" : "",
890 pps->redundant_pic_cnt_present ? "REDU" : "",
891 pps->transform_8x8_mode ? "8x8DCT" : "");
892 }
893
894 14042 remove_pps(ps, pps_id);
895 14042 ps->pps_list[pps_id] = pps_buf;
896
897 14042 return 0;
898
899 14 fail:
900 14 av_buffer_unref(&pps_buf);
901 14 return ret;
902 }
903