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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 / MPEG4 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 "avcodec.h" | |
33 | #include "h264.h" | |
34 | #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan) | |
35 | #include "golomb.h" | |
36 | ||
37 | #define MAX_LOG2_MAX_FRAME_NUM (12 + 4) | |
38 | #define MIN_LOG2_MAX_FRAME_NUM 4 | |
39 | ||
40 | static const AVRational pixel_aspect[17] = { | |
41 | { 0, 1 }, | |
42 | { 1, 1 }, | |
43 | { 12, 11 }, | |
44 | { 10, 11 }, | |
45 | { 16, 11 }, | |
46 | { 40, 33 }, | |
47 | { 24, 11 }, | |
48 | { 20, 11 }, | |
49 | { 32, 11 }, | |
50 | { 80, 33 }, | |
51 | { 18, 11 }, | |
52 | { 15, 11 }, | |
53 | { 64, 33 }, | |
54 | { 160, 99 }, | |
55 | { 4, 3 }, | |
56 | { 3, 2 }, | |
57 | { 2, 1 }, | |
58 | }; | |
59 | ||
60 | #define QP(qP, depth) ((qP) + 6 * ((depth) - 8)) | |
61 | ||
62 | #define CHROMA_QP_TABLE_END(d) \ | |
63 | QP(0, d), QP(1, d), QP(2, d), QP(3, d), QP(4, d), QP(5, d), \ | |
64 | QP(6, d), QP(7, d), QP(8, d), QP(9, d), QP(10, d), QP(11, d), \ | |
65 | QP(12, d), QP(13, d), QP(14, d), QP(15, d), QP(16, d), QP(17, d), \ | |
66 | QP(18, d), QP(19, d), QP(20, d), QP(21, d), QP(22, d), QP(23, d), \ | |
67 | QP(24, d), QP(25, d), QP(26, d), QP(27, d), QP(28, d), QP(29, d), \ | |
68 | QP(29, d), QP(30, d), QP(31, d), QP(32, d), QP(32, d), QP(33, d), \ | |
69 | QP(34, d), QP(34, d), QP(35, d), QP(35, d), QP(36, d), QP(36, d), \ | |
70 | QP(37, d), QP(37, d), QP(37, d), QP(38, d), QP(38, d), QP(38, d), \ | |
71 | QP(39, d), QP(39, d), QP(39, d), QP(39, d) | |
72 | ||
73 | const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM + 1] = { | |
74 | { CHROMA_QP_TABLE_END(8) }, | |
75 | { 0, 1, 2, 3, 4, 5, | |
76 | CHROMA_QP_TABLE_END(9) }, | |
77 | { 0, 1, 2, 3, 4, 5, | |
78 | 6, 7, 8, 9, 10, 11, | |
79 | CHROMA_QP_TABLE_END(10) }, | |
80 | { 0, 1, 2, 3, 4, 5, | |
81 | 6, 7, 8, 9, 10, 11, | |
82 | 12,13,14,15, 16, 17, | |
83 | CHROMA_QP_TABLE_END(11) }, | |
84 | { 0, 1, 2, 3, 4, 5, | |
85 | 6, 7, 8, 9, 10, 11, | |
86 | 12,13,14,15, 16, 17, | |
87 | 18,19,20,21, 22, 23, | |
88 | CHROMA_QP_TABLE_END(12) }, | |
89 | { 0, 1, 2, 3, 4, 5, | |
90 | 6, 7, 8, 9, 10, 11, | |
91 | 12,13,14,15, 16, 17, | |
92 | 18,19,20,21, 22, 23, | |
93 | 24,25,26,27, 28, 29, | |
94 | CHROMA_QP_TABLE_END(13) }, | |
95 | { 0, 1, 2, 3, 4, 5, | |
96 | 6, 7, 8, 9, 10, 11, | |
97 | 12,13,14,15, 16, 17, | |
98 | 18,19,20,21, 22, 23, | |
99 | 24,25,26,27, 28, 29, | |
100 | 30,31,32,33, 34, 35, | |
101 | CHROMA_QP_TABLE_END(14) }, | |
102 | }; | |
103 | ||
104 | static const uint8_t default_scaling4[2][16] = { | |
105 | { 6, 13, 20, 28, 13, 20, 28, 32, | |
106 | 20, 28, 32, 37, 28, 32, 37, 42 }, | |
107 | { 10, 14, 20, 24, 14, 20, 24, 27, | |
108 | 20, 24, 27, 30, 24, 27, 30, 34 } | |
109 | }; | |
110 | ||
111 | static const uint8_t default_scaling8[2][64] = { | |
112 | { 6, 10, 13, 16, 18, 23, 25, 27, | |
113 | 10, 11, 16, 18, 23, 25, 27, 29, | |
114 | 13, 16, 18, 23, 25, 27, 29, 31, | |
115 | 16, 18, 23, 25, 27, 29, 31, 33, | |
116 | 18, 23, 25, 27, 29, 31, 33, 36, | |
117 | 23, 25, 27, 29, 31, 33, 36, 38, | |
118 | 25, 27, 29, 31, 33, 36, 38, 40, | |
119 | 27, 29, 31, 33, 36, 38, 40, 42 }, | |
120 | { 9, 13, 15, 17, 19, 21, 22, 24, | |
121 | 13, 13, 17, 19, 21, 22, 24, 25, | |
122 | 15, 17, 19, 21, 22, 24, 25, 27, | |
123 | 17, 19, 21, 22, 24, 25, 27, 28, | |
124 | 19, 21, 22, 24, 25, 27, 28, 30, | |
125 | 21, 22, 24, 25, 27, 28, 30, 32, | |
126 | 22, 24, 25, 27, 28, 30, 32, 33, | |
127 | 24, 25, 27, 28, 30, 32, 33, 35 } | |
128 | }; | |
129 | ||
130 | static inline int decode_hrd_parameters(H264Context *h, SPS *sps) | |
131 | { | |
132 | int cpb_count, i; | |
133 | cpb_count = get_ue_golomb_31(&h->gb) + 1; | |
134 | ||
135 | if (cpb_count > 32U) { | |
136 | av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count); | |
137 | return AVERROR_INVALIDDATA; | |
138 | } | |
139 | ||
140 | get_bits(&h->gb, 4); /* bit_rate_scale */ | |
141 | get_bits(&h->gb, 4); /* cpb_size_scale */ | |
142 | for (i = 0; i < cpb_count; i++) { | |
143 | get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */ | |
144 | get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */ | |
145 | get_bits1(&h->gb); /* cbr_flag */ | |
146 | } | |
147 | sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1; | |
148 | sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1; | |
149 | sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1; | |
150 | sps->time_offset_length = get_bits(&h->gb, 5); | |
151 | sps->cpb_cnt = cpb_count; | |
152 | return 0; | |
153 | } | |
154 | ||
155 | static inline int decode_vui_parameters(H264Context *h, SPS *sps) | |
156 | { | |
157 | int aspect_ratio_info_present_flag; | |
158 | unsigned int aspect_ratio_idc; | |
159 | ||
160 | aspect_ratio_info_present_flag = get_bits1(&h->gb); | |
161 | ||
162 | if (aspect_ratio_info_present_flag) { | |
163 | aspect_ratio_idc = get_bits(&h->gb, 8); | |
164 | if (aspect_ratio_idc == EXTENDED_SAR) { | |
165 | sps->sar.num = get_bits(&h->gb, 16); | |
166 | sps->sar.den = get_bits(&h->gb, 16); | |
167 | } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)) { | |
168 | sps->sar = pixel_aspect[aspect_ratio_idc]; | |
169 | } else { | |
170 | av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n"); | |
171 | return AVERROR_INVALIDDATA; | |
172 | } | |
173 | } else { | |
174 | sps->sar.num = | |
175 | sps->sar.den = 0; | |
176 | } | |
177 | ||
178 | if (get_bits1(&h->gb)) /* overscan_info_present_flag */ | |
179 | get_bits1(&h->gb); /* overscan_appropriate_flag */ | |
180 | ||
181 | sps->video_signal_type_present_flag = get_bits1(&h->gb); | |
182 | if (sps->video_signal_type_present_flag) { | |
183 | get_bits(&h->gb, 3); /* video_format */ | |
184 | sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */ | |
185 | ||
186 | sps->colour_description_present_flag = get_bits1(&h->gb); | |
187 | if (sps->colour_description_present_flag) { | |
188 | sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */ | |
189 | sps->color_trc = get_bits(&h->gb, 8); /* transfer_characteristics */ | |
190 | sps->colorspace = get_bits(&h->gb, 8); /* matrix_coefficients */ | |
191 | if (sps->color_primaries >= AVCOL_PRI_NB) | |
192 | sps->color_primaries = AVCOL_PRI_UNSPECIFIED; | |
193 | if (sps->color_trc >= AVCOL_TRC_NB) | |
194 | sps->color_trc = AVCOL_TRC_UNSPECIFIED; | |
195 | if (sps->colorspace >= AVCOL_SPC_NB) | |
196 | sps->colorspace = AVCOL_SPC_UNSPECIFIED; | |
197 | } | |
198 | } | |
199 | ||
200 | /* chroma_location_info_present_flag */ | |
201 | if (get_bits1(&h->gb)) { | |
202 | /* chroma_sample_location_type_top_field */ | |
203 | h->avctx->chroma_sample_location = get_ue_golomb(&h->gb) + 1; | |
204 | get_ue_golomb(&h->gb); /* chroma_sample_location_type_bottom_field */ | |
205 | } | |
206 | ||
207 | if (show_bits1(&h->gb) && get_bits_left(&h->gb) < 10) { | |
208 | av_log(h->avctx, AV_LOG_WARNING, "Truncated VUI\n"); | |
209 | return 0; | |
210 | } | |
211 | ||
212 | sps->timing_info_present_flag = get_bits1(&h->gb); | |
213 | if (sps->timing_info_present_flag) { | |
214 | sps->num_units_in_tick = get_bits_long(&h->gb, 32); | |
215 | sps->time_scale = get_bits_long(&h->gb, 32); | |
216 | if (!sps->num_units_in_tick || !sps->time_scale) { | |
217 | av_log(h->avctx, AV_LOG_ERROR, | |
218 | "time_scale/num_units_in_tick invalid or unsupported (%"PRIu32"/%"PRIu32")\n", | |
219 | sps->time_scale, sps->num_units_in_tick); | |
220 | return AVERROR_INVALIDDATA; | |
221 | } | |
222 | sps->fixed_frame_rate_flag = get_bits1(&h->gb); | |
223 | } | |
224 | ||
225 | sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb); | |
226 | if (sps->nal_hrd_parameters_present_flag) | |
227 | if (decode_hrd_parameters(h, sps) < 0) | |
228 | return AVERROR_INVALIDDATA; | |
229 | sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb); | |
230 | if (sps->vcl_hrd_parameters_present_flag) | |
231 | if (decode_hrd_parameters(h, sps) < 0) | |
232 | return AVERROR_INVALIDDATA; | |
233 | if (sps->nal_hrd_parameters_present_flag || | |
234 | sps->vcl_hrd_parameters_present_flag) | |
235 | get_bits1(&h->gb); /* low_delay_hrd_flag */ | |
236 | sps->pic_struct_present_flag = get_bits1(&h->gb); | |
237 | if (!get_bits_left(&h->gb)) | |
238 | return 0; | |
239 | sps->bitstream_restriction_flag = get_bits1(&h->gb); | |
240 | if (sps->bitstream_restriction_flag) { | |
241 | get_bits1(&h->gb); /* motion_vectors_over_pic_boundaries_flag */ | |
242 | get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */ | |
243 | get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */ | |
244 | get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */ | |
245 | get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */ | |
246 | sps->num_reorder_frames = get_ue_golomb(&h->gb); | |
247 | get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/ | |
248 | ||
249 | if (get_bits_left(&h->gb) < 0) { | |
250 | sps->num_reorder_frames = 0; | |
251 | sps->bitstream_restriction_flag = 0; | |
252 | } | |
253 | ||
254 | if (sps->num_reorder_frames > 16U | |
255 | /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) { | |
256 | av_log(h->avctx, AV_LOG_ERROR, | |
257 | "Clipping illegal num_reorder_frames %d\n", | |
258 | sps->num_reorder_frames); | |
259 | sps->num_reorder_frames = 16; | |
260 | return AVERROR_INVALIDDATA; | |
261 | } | |
262 | } | |
263 | ||
264 | if (get_bits_left(&h->gb) < 0) { | |
265 | av_log(h->avctx, AV_LOG_ERROR, | |
266 | "Overread VUI by %d bits\n", -get_bits_left(&h->gb)); | |
267 | return AVERROR_INVALIDDATA; | |
268 | } | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static void decode_scaling_list(H264Context *h, uint8_t *factors, int size, | |
274 | const uint8_t *jvt_list, | |
275 | const uint8_t *fallback_list) | |
276 | { | |
277 | int i, last = 8, next = 8; | |
278 | const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct; | |
279 | if (!get_bits1(&h->gb)) /* matrix not written, we use the predicted one */ | |
280 | memcpy(factors, fallback_list, size * sizeof(uint8_t)); | |
281 | else | |
282 | for (i = 0; i < size; i++) { | |
283 | if (next) | |
284 | next = (last + get_se_golomb(&h->gb)) & 0xff; | |
285 | if (!i && !next) { /* matrix not written, we use the preset one */ | |
286 | memcpy(factors, jvt_list, size * sizeof(uint8_t)); | |
287 | break; | |
288 | } | |
289 | last = factors[scan[i]] = next ? next : last; | |
290 | } | |
291 | } | |
292 | ||
293 | static void decode_scaling_matrices(H264Context *h, SPS *sps, | |
294 | PPS *pps, int is_sps, | |
295 | uint8_t(*scaling_matrix4)[16], | |
296 | uint8_t(*scaling_matrix8)[64]) | |
297 | { | |
298 | int fallback_sps = !is_sps && sps->scaling_matrix_present; | |
299 | const uint8_t *fallback[4] = { | |
300 | fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0], | |
301 | fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1], | |
302 | fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0], | |
303 | fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1] | |
304 | }; | |
305 | if (get_bits1(&h->gb)) { | |
306 | sps->scaling_matrix_present |= is_sps; | |
307 | decode_scaling_list(h, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y | |
308 | decode_scaling_list(h, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr | |
309 | decode_scaling_list(h, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb | |
310 | decode_scaling_list(h, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y | |
311 | decode_scaling_list(h, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr | |
312 | decode_scaling_list(h, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb | |
313 | if (is_sps || pps->transform_8x8_mode) { | |
314 | decode_scaling_list(h, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y | |
315 | decode_scaling_list(h, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y | |
316 | if (sps->chroma_format_idc == 3) { | |
317 | decode_scaling_list(h, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr | |
318 | decode_scaling_list(h, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr | |
319 | decode_scaling_list(h, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb | |
320 | decode_scaling_list(h, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb | |
321 | } | |
322 | } | |
323 | } | |
324 | } | |
325 | ||
326 | int ff_h264_decode_seq_parameter_set(H264Context *h) | |
327 | { | |
328 | int profile_idc, level_idc, constraint_set_flags = 0; | |
329 | unsigned int sps_id; | |
330 | int i, log2_max_frame_num_minus4; | |
331 | SPS *sps; | |
332 | ||
333 | profile_idc = get_bits(&h->gb, 8); | |
334 | constraint_set_flags |= get_bits1(&h->gb) << 0; // constraint_set0_flag | |
335 | constraint_set_flags |= get_bits1(&h->gb) << 1; // constraint_set1_flag | |
336 | constraint_set_flags |= get_bits1(&h->gb) << 2; // constraint_set2_flag | |
337 | constraint_set_flags |= get_bits1(&h->gb) << 3; // constraint_set3_flag | |
338 | constraint_set_flags |= get_bits1(&h->gb) << 4; // constraint_set4_flag | |
339 | constraint_set_flags |= get_bits1(&h->gb) << 5; // constraint_set5_flag | |
340 | skip_bits(&h->gb, 2); // reserved_zero_2bits | |
341 | level_idc = get_bits(&h->gb, 8); | |
342 | sps_id = get_ue_golomb_31(&h->gb); | |
343 | ||
344 | if (sps_id >= MAX_SPS_COUNT) { | |
345 | av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id); | |
346 | return AVERROR_INVALIDDATA; | |
347 | } | |
348 | sps = av_mallocz(sizeof(SPS)); | |
349 | if (!sps) | |
350 | return AVERROR(ENOMEM); | |
351 | ||
352 | sps->sps_id = sps_id; | |
353 | sps->time_offset_length = 24; | |
354 | sps->profile_idc = profile_idc; | |
355 | sps->constraint_set_flags = constraint_set_flags; | |
356 | sps->level_idc = level_idc; | |
357 | sps->full_range = -1; | |
358 | ||
359 | memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4)); | |
360 | memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8)); | |
361 | sps->scaling_matrix_present = 0; | |
362 | sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED | |
363 | ||
364 | if (sps->profile_idc == 100 || // High profile | |
365 | sps->profile_idc == 110 || // High10 profile | |
366 | sps->profile_idc == 122 || // High422 profile | |
367 | sps->profile_idc == 244 || // High444 Predictive profile | |
368 | sps->profile_idc == 44 || // Cavlc444 profile | |
369 | sps->profile_idc == 83 || // Scalable Constrained High profile (SVC) | |
370 | sps->profile_idc == 86 || // Scalable High Intra profile (SVC) | |
371 | sps->profile_idc == 118 || // Stereo High profile (MVC) | |
372 | sps->profile_idc == 128 || // Multiview High profile (MVC) | |
373 | sps->profile_idc == 138 || // Multiview Depth High profile (MVCD) | |
374 | sps->profile_idc == 144) { // old High444 profile | |
375 | sps->chroma_format_idc = get_ue_golomb_31(&h->gb); | |
376 | if (sps->chroma_format_idc > 3U) { | |
377 | avpriv_request_sample(h->avctx, "chroma_format_idc %u", | |
378 | sps->chroma_format_idc); | |
379 | goto fail; | |
380 | } else if (sps->chroma_format_idc == 3) { | |
381 | sps->residual_color_transform_flag = get_bits1(&h->gb); | |
382 | if (sps->residual_color_transform_flag) { | |
383 | av_log(h->avctx, AV_LOG_ERROR, "separate color planes are not supported\n"); | |
384 | goto fail; | |
385 | } | |
386 | } | |
387 | sps->bit_depth_luma = get_ue_golomb(&h->gb) + 8; | |
388 | sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8; | |
389 | if (sps->bit_depth_chroma != sps->bit_depth_luma) { | |
390 | avpriv_request_sample(h->avctx, | |
391 | "Different chroma and luma bit depth"); | |
392 | goto fail; | |
393 | } | |
394 | if (sps->bit_depth_luma > 14U || sps->bit_depth_chroma > 14U) { | |
395 | av_log(h->avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n", | |
396 | sps->bit_depth_luma, sps->bit_depth_chroma); | |
397 | goto fail; | |
398 | } | |
399 | sps->transform_bypass = get_bits1(&h->gb); | |
400 | decode_scaling_matrices(h, sps, NULL, 1, | |
401 | sps->scaling_matrix4, sps->scaling_matrix8); | |
402 | } else { | |
403 | sps->chroma_format_idc = 1; | |
404 | sps->bit_depth_luma = 8; | |
405 | sps->bit_depth_chroma = 8; | |
406 | } | |
407 | ||
408 | log2_max_frame_num_minus4 = get_ue_golomb(&h->gb); | |
409 | if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 || | |
410 | log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) { | |
411 | av_log(h->avctx, AV_LOG_ERROR, | |
412 | "log2_max_frame_num_minus4 out of range (0-12): %d\n", | |
413 | log2_max_frame_num_minus4); | |
414 | goto fail; | |
415 | } | |
416 | sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4; | |
417 | ||
418 | sps->poc_type = get_ue_golomb_31(&h->gb); | |
419 | ||
420 | if (sps->poc_type == 0) { // FIXME #define | |
421 | unsigned t = get_ue_golomb(&h->gb); | |
422 | if (t>12) { | |
423 | av_log(h->avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t); | |
424 | goto fail; | |
425 | } | |
426 | sps->log2_max_poc_lsb = t + 4; | |
427 | } else if (sps->poc_type == 1) { // FIXME #define | |
428 | sps->delta_pic_order_always_zero_flag = get_bits1(&h->gb); | |
429 | sps->offset_for_non_ref_pic = get_se_golomb(&h->gb); | |
430 | sps->offset_for_top_to_bottom_field = get_se_golomb(&h->gb); | |
431 | sps->poc_cycle_length = get_ue_golomb(&h->gb); | |
432 | ||
433 | if ((unsigned)sps->poc_cycle_length >= | |
434 | FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) { | |
435 | av_log(h->avctx, AV_LOG_ERROR, | |
436 | "poc_cycle_length overflow %d\n", sps->poc_cycle_length); | |
437 | goto fail; | |
438 | } | |
439 | ||
440 | for (i = 0; i < sps->poc_cycle_length; i++) | |
441 | sps->offset_for_ref_frame[i] = get_se_golomb(&h->gb); | |
442 | } else if (sps->poc_type != 2) { | |
443 | av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type); | |
444 | goto fail; | |
445 | } | |
446 | ||
447 | sps->ref_frame_count = get_ue_golomb_31(&h->gb); | |
448 | if (h->avctx->codec_tag == MKTAG('S', 'M', 'V', '2')) | |
449 | sps->ref_frame_count = FFMAX(2, sps->ref_frame_count); | |
450 | if (sps->ref_frame_count > H264_MAX_PICTURE_COUNT - 2 || | |
451 | sps->ref_frame_count > 16U) { | |
452 | av_log(h->avctx, AV_LOG_ERROR, | |
453 | "too many reference frames %d\n", sps->ref_frame_count); | |
454 | goto fail; | |
455 | } | |
456 | sps->gaps_in_frame_num_allowed_flag = get_bits1(&h->gb); | |
457 | sps->mb_width = get_ue_golomb(&h->gb) + 1; | |
458 | sps->mb_height = get_ue_golomb(&h->gb) + 1; | |
459 | if ((unsigned)sps->mb_width >= INT_MAX / 16 || | |
460 | (unsigned)sps->mb_height >= INT_MAX / 16 || | |
461 | av_image_check_size(16 * sps->mb_width, | |
462 | 16 * sps->mb_height, 0, h->avctx)) { | |
463 | av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n"); | |
464 | goto fail; | |
465 | } | |
466 | ||
467 | sps->frame_mbs_only_flag = get_bits1(&h->gb); | |
468 | if (!sps->frame_mbs_only_flag) | |
469 | sps->mb_aff = get_bits1(&h->gb); | |
470 | else | |
471 | sps->mb_aff = 0; | |
472 | ||
473 | sps->direct_8x8_inference_flag = get_bits1(&h->gb); | |
474 | ||
475 | #ifndef ALLOW_INTERLACE | |
476 | if (sps->mb_aff) | |
477 | av_log(h->avctx, AV_LOG_ERROR, | |
478 | "MBAFF support not included; enable it at compile-time.\n"); | |
479 | #endif | |
480 | sps->crop = get_bits1(&h->gb); | |
481 | if (sps->crop) { | |
482 | int crop_left = get_ue_golomb(&h->gb); | |
483 | int crop_right = get_ue_golomb(&h->gb); | |
484 | int crop_top = get_ue_golomb(&h->gb); | |
485 | int crop_bottom = get_ue_golomb(&h->gb); | |
486 | int width = 16 * sps->mb_width; | |
487 | int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag); | |
488 | ||
489 | if (h->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) { | |
490 | av_log(h->avctx, AV_LOG_DEBUG, "discarding sps cropping, original " | |
491 | "values are l:%d r:%d t:%d b:%d\n", | |
492 | crop_left, crop_right, crop_top, crop_bottom); | |
493 | ||
494 | sps->crop_left = | |
495 | sps->crop_right = | |
496 | sps->crop_top = | |
497 | sps->crop_bottom = 0; | |
498 | } else { | |
499 | int vsub = (sps->chroma_format_idc == 1) ? 1 : 0; | |
500 | int hsub = (sps->chroma_format_idc == 1 || | |
501 | sps->chroma_format_idc == 2) ? 1 : 0; | |
502 | int step_x = 1 << hsub; | |
503 | int step_y = (2 - sps->frame_mbs_only_flag) << vsub; | |
504 | ||
505 | if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) && | |
506 | !(h->avctx->flags & CODEC_FLAG_UNALIGNED)) { | |
507 | crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8)); | |
508 | av_log(h->avctx, AV_LOG_WARNING, | |
509 | "Reducing left cropping to %d " | |
510 | "chroma samples to preserve alignment.\n", | |
511 | crop_left); | |
512 | } | |
513 | ||
514 | if (crop_left > (unsigned)INT_MAX / 4 / step_x || | |
515 | crop_right > (unsigned)INT_MAX / 4 / step_x || | |
516 | crop_top > (unsigned)INT_MAX / 4 / step_y || | |
517 | crop_bottom> (unsigned)INT_MAX / 4 / step_y || | |
518 | (crop_left + crop_right ) * step_x >= width || | |
519 | (crop_top + crop_bottom) * step_y >= height | |
520 | ) { | |
521 | av_log(h->avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height); | |
522 | goto fail; | |
523 | } | |
524 | ||
525 | sps->crop_left = crop_left * step_x; | |
526 | sps->crop_right = crop_right * step_x; | |
527 | sps->crop_top = crop_top * step_y; | |
528 | sps->crop_bottom = crop_bottom * step_y; | |
529 | } | |
530 | } else { | |
531 | sps->crop_left = | |
532 | sps->crop_right = | |
533 | sps->crop_top = | |
534 | sps->crop_bottom = | |
535 | sps->crop = 0; | |
536 | } | |
537 | ||
538 | sps->vui_parameters_present_flag = get_bits1(&h->gb); | |
539 | if (sps->vui_parameters_present_flag) { | |
540 | int ret = decode_vui_parameters(h, sps); | |
541 | if (ret < 0) | |
542 | goto fail; | |
543 | } | |
544 | ||
545 | if (!sps->sar.den) | |
546 | sps->sar.den = 1; | |
547 | ||
548 | if (h->avctx->debug & FF_DEBUG_PICT_INFO) { | |
549 | static const char csp[4][5] = { "Gray", "420", "422", "444" }; | |
550 | av_log(h->avctx, AV_LOG_DEBUG, | |
551 | "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", | |
552 | sps_id, sps->profile_idc, sps->level_idc, | |
553 | sps->poc_type, | |
554 | sps->ref_frame_count, | |
555 | sps->mb_width, sps->mb_height, | |
556 | sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"), | |
557 | sps->direct_8x8_inference_flag ? "8B8" : "", | |
558 | sps->crop_left, sps->crop_right, | |
559 | sps->crop_top, sps->crop_bottom, | |
560 | sps->vui_parameters_present_flag ? "VUI" : "", | |
561 | csp[sps->chroma_format_idc], | |
562 | sps->timing_info_present_flag ? sps->num_units_in_tick : 0, | |
563 | sps->timing_info_present_flag ? sps->time_scale : 0, | |
564 | sps->bit_depth_luma, | |
565 | sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1 | |
566 | ); | |
567 | } | |
568 | sps->new = 1; | |
569 | ||
570 | av_free(h->sps_buffers[sps_id]); | |
571 | h->sps_buffers[sps_id] = sps; | |
572 | ||
573 | return 0; | |
574 | ||
575 | fail: | |
576 | av_free(sps); | |
577 | return -1; | |
578 | } | |
579 | ||
580 | static void build_qp_table(PPS *pps, int t, int index, const int depth) | |
581 | { | |
582 | int i; | |
583 | const int max_qp = 51 + 6 * (depth - 8); | |
584 | for (i = 0; i < max_qp + 1; i++) | |
585 | pps->chroma_qp_table[t][i] = | |
586 | ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)]; | |
587 | } | |
588 | ||
589 | static int more_rbsp_data_in_pps(H264Context *h, PPS *pps) | |
590 | { | |
591 | const SPS *sps = h->sps_buffers[pps->sps_id]; | |
592 | int profile_idc = sps->profile_idc; | |
593 | ||
594 | if ((profile_idc == 66 || profile_idc == 77 || | |
595 | profile_idc == 88) && (sps->constraint_set_flags & 7)) { | |
596 | av_log(h->avctx, AV_LOG_VERBOSE, | |
597 | "Current profile doesn't provide more RBSP data in PPS, skipping\n"); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | return 1; | |
602 | } | |
603 | ||
604 | int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length) | |
605 | { | |
606 | unsigned int pps_id = get_ue_golomb(&h->gb); | |
607 | PPS *pps; | |
608 | SPS *sps; | |
609 | int qp_bd_offset; | |
610 | int bits_left; | |
611 | ||
612 | if (pps_id >= MAX_PPS_COUNT) { | |
613 | av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id); | |
614 | return AVERROR_INVALIDDATA; | |
615 | } | |
616 | ||
617 | pps = av_mallocz(sizeof(PPS)); | |
618 | if (!pps) | |
619 | return AVERROR(ENOMEM); | |
620 | pps->sps_id = get_ue_golomb_31(&h->gb); | |
621 | if ((unsigned)pps->sps_id >= MAX_SPS_COUNT || | |
622 | !h->sps_buffers[pps->sps_id]) { | |
623 | av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id); | |
624 | goto fail; | |
625 | } | |
626 | sps = h->sps_buffers[pps->sps_id]; | |
627 | qp_bd_offset = 6 * (sps->bit_depth_luma - 8); | |
628 | if (sps->bit_depth_luma > 14) { | |
629 | av_log(h->avctx, AV_LOG_ERROR, | |
630 | "Invalid luma bit depth=%d\n", | |
631 | sps->bit_depth_luma); | |
632 | goto fail; | |
633 | } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) { | |
634 | av_log(h->avctx, AV_LOG_ERROR, | |
635 | "Unimplemented luma bit depth=%d\n", | |
636 | sps->bit_depth_luma); | |
637 | goto fail; | |
638 | } | |
639 | ||
640 | pps->cabac = get_bits1(&h->gb); | |
641 | pps->pic_order_present = get_bits1(&h->gb); | |
642 | pps->slice_group_count = get_ue_golomb(&h->gb) + 1; | |
643 | if (pps->slice_group_count > 1) { | |
644 | pps->mb_slice_group_map_type = get_ue_golomb(&h->gb); | |
645 | av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n"); | |
646 | switch (pps->mb_slice_group_map_type) { | |
647 | case 0: | |
648 | #if 0 | |
649 | | for (i = 0; i <= num_slice_groups_minus1; i++) | | | | |
650 | | run_length[i] |1 |ue(v) | | |
651 | #endif | |
652 | break; | |
653 | case 2: | |
654 | #if 0 | |
655 | | for (i = 0; i < num_slice_groups_minus1; i++) { | | | | |
656 | | top_left_mb[i] |1 |ue(v) | | |
657 | | bottom_right_mb[i] |1 |ue(v) | | |
658 | | } | | | | |
659 | #endif | |
660 | break; | |
661 | case 3: | |
662 | case 4: | |
663 | case 5: | |
664 | #if 0 | |
665 | | slice_group_change_direction_flag |1 |u(1) | | |
666 | | slice_group_change_rate_minus1 |1 |ue(v) | | |
667 | #endif | |
668 | break; | |
669 | case 6: | |
670 | #if 0 | |
671 | | slice_group_id_cnt_minus1 |1 |ue(v) | | |
672 | | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | | | |
673 | | slice_group_id[i] |1 |u(v) | | |
674 | #endif | |
675 | break; | |
676 | } | |
677 | } | |
678 | pps->ref_count[0] = get_ue_golomb(&h->gb) + 1; | |
679 | pps->ref_count[1] = get_ue_golomb(&h->gb) + 1; | |
680 | if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) { | |
681 | av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n"); | |
682 | goto fail; | |
683 | } | |
684 | ||
685 | pps->weighted_pred = get_bits1(&h->gb); | |
686 | pps->weighted_bipred_idc = get_bits(&h->gb, 2); | |
687 | pps->init_qp = get_se_golomb(&h->gb) + 26 + qp_bd_offset; | |
688 | pps->init_qs = get_se_golomb(&h->gb) + 26 + qp_bd_offset; | |
689 | pps->chroma_qp_index_offset[0] = get_se_golomb(&h->gb); | |
690 | pps->deblocking_filter_parameters_present = get_bits1(&h->gb); | |
691 | pps->constrained_intra_pred = get_bits1(&h->gb); | |
692 | pps->redundant_pic_cnt_present = get_bits1(&h->gb); | |
693 | ||
694 | pps->transform_8x8_mode = 0; | |
695 | // contents of sps/pps can change even if id doesn't, so reinit | |
696 | h->dequant_coeff_pps = -1; | |
697 | memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, | |
698 | sizeof(pps->scaling_matrix4)); | |
699 | memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, | |
700 | sizeof(pps->scaling_matrix8)); | |
701 | ||
702 | bits_left = bit_length - get_bits_count(&h->gb); | |
703 | if (bits_left > 0 && more_rbsp_data_in_pps(h, pps)) { | |
704 | pps->transform_8x8_mode = get_bits1(&h->gb); | |
705 | decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, | |
706 | pps->scaling_matrix4, pps->scaling_matrix8); | |
707 | // second_chroma_qp_index_offset | |
708 | pps->chroma_qp_index_offset[1] = get_se_golomb(&h->gb); | |
709 | } else { | |
710 | pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0]; | |
711 | } | |
712 | ||
713 | build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], sps->bit_depth_luma); | |
714 | build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], sps->bit_depth_luma); | |
715 | if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1]) | |
716 | pps->chroma_qp_diff = 1; | |
717 | ||
718 | if (h->avctx->debug & FF_DEBUG_PICT_INFO) { | |
719 | av_log(h->avctx, AV_LOG_DEBUG, | |
720 | "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n", | |
721 | pps_id, pps->sps_id, | |
722 | pps->cabac ? "CABAC" : "CAVLC", | |
723 | pps->slice_group_count, | |
724 | pps->ref_count[0], pps->ref_count[1], | |
725 | pps->weighted_pred ? "weighted" : "", | |
726 | pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1], | |
727 | pps->deblocking_filter_parameters_present ? "LPAR" : "", | |
728 | pps->constrained_intra_pred ? "CONSTR" : "", | |
729 | pps->redundant_pic_cnt_present ? "REDU" : "", | |
730 | pps->transform_8x8_mode ? "8x8DCT" : ""); | |
731 | } | |
732 | ||
733 | av_free(h->pps_buffers[pps_id]); | |
734 | h->pps_buffers[pps_id] = pps; | |
735 | return 0; | |
736 | ||
737 | fail: | |
738 | av_free(pps); | |
739 | return -1; | |
740 | } |