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1 | /* | ||
2 | * H.264/HEVC common parsing code | ||
3 | * | ||
4 | * This file is part of FFmpeg. | ||
5 | * | ||
6 | * FFmpeg is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU Lesser General Public | ||
8 | * License as published by the Free Software Foundation; either | ||
9 | * version 2.1 of the License, or (at your option) any later version. | ||
10 | * | ||
11 | * FFmpeg is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
14 | * Lesser General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU Lesser General Public | ||
17 | * License along with FFmpeg; if not, write to the Free Software | ||
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
19 | */ | ||
20 | |||
21 | #include <string.h> | ||
22 | |||
23 | #include "config.h" | ||
24 | |||
25 | #include "libavutil/error.h" | ||
26 | #include "libavutil/intmath.h" | ||
27 | #include "libavutil/intreadwrite.h" | ||
28 | #include "libavutil/mem.h" | ||
29 | |||
30 | #include "bytestream.h" | ||
31 | #include "h264.h" | ||
32 | #include "h2645_parse.h" | ||
33 | #include "vvc.h" | ||
34 | |||
35 | #include "hevc/hevc.h" | ||
36 | |||
37 | 233138 | int ff_h2645_extract_rbsp(const uint8_t *src, int length, | |
38 | H2645RBSP *rbsp, H2645NAL *nal, int small_padding) | ||
39 | { | ||
40 | int i, si, di; | ||
41 | uint8_t *dst; | ||
42 | |||
43 | 233138 | nal->skipped_bytes = 0; | |
44 | #define STARTCODE_TEST \ | ||
45 | if (i + 2 < length && src[i + 1] == 0 && \ | ||
46 | (src[i + 2] == 3 || src[i + 2] == 1)) { \ | ||
47 | if (src[i + 2] == 1) { \ | ||
48 | /* startcode, so we must be past the end */ \ | ||
49 | length = i; \ | ||
50 | } \ | ||
51 | break; \ | ||
52 | } | ||
53 | #if HAVE_FAST_UNALIGNED | ||
54 | #define FIND_FIRST_ZERO \ | ||
55 | if (i > 0 && !src[i]) \ | ||
56 | i--; \ | ||
57 | while (src[i]) \ | ||
58 | i++ | ||
59 | #if HAVE_FAST_64BIT | ||
60 |
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52430299 | for (i = 0; i + 1 < length; i += 9) { |
61 | 103090070 | if (!((~AV_RN64(src + i) & | |
62 |
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52326076 | (AV_RN64(src + i) - 0x0100010001000101ULL)) & |
63 | 0x8000800080008080ULL)) | ||
64 | 50763994 | continue; | |
65 |
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6400788 | FIND_FIRST_ZERO; |
66 |
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1562082 | STARTCODE_TEST; |
67 | 1433167 | i -= 7; | |
68 | } | ||
69 | #else | ||
70 | for (i = 0; i + 1 < length; i += 5) { | ||
71 | if (!((~AV_RN32(src + i) & | ||
72 | (AV_RN32(src + i) - 0x01000101U)) & | ||
73 | 0x80008080U)) | ||
74 | continue; | ||
75 | FIND_FIRST_ZERO; | ||
76 | STARTCODE_TEST; | ||
77 | i -= 3; | ||
78 | } | ||
79 | #endif /* HAVE_FAST_64BIT */ | ||
80 | #else | ||
81 | for (i = 0; i + 1 < length; i += 2) { | ||
82 | if (src[i]) | ||
83 | continue; | ||
84 | if (i > 0 && src[i - 1] == 0) | ||
85 | i--; | ||
86 | STARTCODE_TEST; | ||
87 | } | ||
88 | #endif /* HAVE_FAST_UNALIGNED */ | ||
89 | |||
90 |
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233138 | if (i >= length - 1 && small_padding) { // no escaped 0 |
91 | 174157 | nal->data = | |
92 | 174157 | nal->raw_data = src; | |
93 | 174157 | nal->size = | |
94 | 174157 | nal->raw_size = length; | |
95 | 174157 | return length; | |
96 |
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58981 | } else if (i > length) |
97 | 24068 | i = length; | |
98 | |||
99 | 58981 | dst = &rbsp->rbsp_buffer[rbsp->rbsp_buffer_size]; | |
100 | |||
101 | 58981 | memcpy(dst, src, i); | |
102 | 58981 | si = di = i; | |
103 |
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10540318 | while (si + 2 < length) { |
104 | // remove escapes (very rare 1:2^22) | ||
105 |
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10487527 | if (src[si + 2] > 3) { |
106 | 10184847 | dst[di++] = src[si++]; | |
107 | 10184847 | dst[di++] = src[si++]; | |
108 |
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302680 | } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) { |
109 |
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38308 | if (src[si + 2] == 3) { // escape |
110 | 32118 | dst[di++] = 0; | |
111 | 32118 | dst[di++] = 0; | |
112 | 32118 | si += 3; | |
113 | |||
114 |
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32118 | if (nal->skipped_bytes_pos) { |
115 | 25284 | nal->skipped_bytes++; | |
116 |
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25284 | if (nal->skipped_bytes_pos_size < nal->skipped_bytes) { |
117 | 22 | nal->skipped_bytes_pos_size *= 2; | |
118 |
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22 | av_assert0(nal->skipped_bytes_pos_size >= nal->skipped_bytes); |
119 | 22 | av_reallocp_array(&nal->skipped_bytes_pos, | |
120 | 22 | nal->skipped_bytes_pos_size, | |
121 | sizeof(*nal->skipped_bytes_pos)); | ||
122 |
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22 | if (!nal->skipped_bytes_pos) { |
123 | ✗ | nal->skipped_bytes_pos_size = 0; | |
124 | ✗ | return AVERROR(ENOMEM); | |
125 | } | ||
126 | } | ||
127 |
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25284 | if (nal->skipped_bytes_pos) |
128 | 25284 | nal->skipped_bytes_pos[nal->skipped_bytes-1] = di - 1; | |
129 | } | ||
130 | 32118 | continue; | |
131 | } else // next start code | ||
132 | 6190 | goto nsc; | |
133 | } | ||
134 | |||
135 | 10449219 | dst[di++] = src[si++]; | |
136 | } | ||
137 |
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58572 | while (si < length) |
138 | 5781 | dst[di++] = src[si++]; | |
139 | |||
140 | 52791 | nsc: | |
141 | 58981 | memset(dst + di, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
142 | |||
143 | 58981 | nal->data = dst; | |
144 | 58981 | nal->size = di; | |
145 | 58981 | nal->raw_data = src; | |
146 | 58981 | nal->raw_size = si; | |
147 | 58981 | rbsp->rbsp_buffer_size += si; | |
148 | |||
149 | 58981 | return si; | |
150 | } | ||
151 | |||
152 | static const char *const vvc_nal_type_name[32] = { | ||
153 | "TRAIL_NUT", // VVC_TRAIL_NUT | ||
154 | "STSA_NUT", // VVC_STSA_NUT | ||
155 | "RADL_NUT", // VVC_RADL_NUT | ||
156 | "RASL_NUT", // VVC_RASL_NUT | ||
157 | "RSV_VCL4", // VVC_RSV_VCL_4 | ||
158 | "RSV_VCL5", // VVC_RSV_VCL_5 | ||
159 | "RSV_VCL6", // VVC_RSV_VCL_6 | ||
160 | "IDR_W_RADL", // VVC_IDR_W_RADL | ||
161 | "IDR_N_LP", // VVC_IDR_N_LP | ||
162 | "CRA_NUT", // VVC_CRA_NUT | ||
163 | "GDR_NUT", // VVC_GDR_NUT | ||
164 | "RSV_IRAP_11", // VVC_RSV_IRAP_11 | ||
165 | "OPI_NUT", // VVC_OPI_NUT | ||
166 | "DCI_NUT", // VVC_DCI_NUT | ||
167 | "VPS_NUT", // VVC_VPS_NUT | ||
168 | "SPS_NUT", // VVC_SPS_NUT | ||
169 | "PPS_NUT", // VVC_PPS_NUT | ||
170 | "APS_PREFIX", // VVC_PREFIX_APS_NUT | ||
171 | "APS_SUFFIX", // VVC_SUFFIX_APS_NUT | ||
172 | "PH_NUT", // VVC_PH_NUT | ||
173 | "AUD_NUT", // VVC_AUD_NUT | ||
174 | "EOS_NUT", // VVC_EOS_NUT | ||
175 | "EOB_NUT", // VVC_EOB_NUT | ||
176 | "SEI_PREFIX", // VVC_PREFIX_SEI_NUT | ||
177 | "SEI_SUFFIX", // VVC_SUFFIX_SEI_NUT | ||
178 | "FD_NUT", // VVC_FD_NUT | ||
179 | "RSV_NVCL26", // VVC_RSV_NVCL_26 | ||
180 | "RSV_NVCL27", // VVC_RSV_NVCL_27 | ||
181 | "UNSPEC28", // VVC_UNSPEC_28 | ||
182 | "UNSPEC29", // VVC_UNSPEC_29 | ||
183 | "UNSPEC30", // VVC_UNSPEC_30 | ||
184 | "UNSPEC31", // VVC_UNSPEC_31 | ||
185 | }; | ||
186 | |||
187 | 19233 | static const char *vvc_nal_unit_name(int nal_type) | |
188 | { | ||
189 |
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19233 | av_assert0(nal_type >= 0 && nal_type < 32); |
190 | 19233 | return vvc_nal_type_name[nal_type]; | |
191 | } | ||
192 | |||
193 | static const char *const hevc_nal_type_name[64] = { | ||
194 | "TRAIL_N", // HEVC_NAL_TRAIL_N | ||
195 | "TRAIL_R", // HEVC_NAL_TRAIL_R | ||
196 | "TSA_N", // HEVC_NAL_TSA_N | ||
197 | "TSA_R", // HEVC_NAL_TSA_R | ||
198 | "STSA_N", // HEVC_NAL_STSA_N | ||
199 | "STSA_R", // HEVC_NAL_STSA_R | ||
200 | "RADL_N", // HEVC_NAL_RADL_N | ||
201 | "RADL_R", // HEVC_NAL_RADL_R | ||
202 | "RASL_N", // HEVC_NAL_RASL_N | ||
203 | "RASL_R", // HEVC_NAL_RASL_R | ||
204 | "RSV_VCL_N10", // HEVC_NAL_VCL_N10 | ||
205 | "RSV_VCL_R11", // HEVC_NAL_VCL_R11 | ||
206 | "RSV_VCL_N12", // HEVC_NAL_VCL_N12 | ||
207 | "RSV_VLC_R13", // HEVC_NAL_VCL_R13 | ||
208 | "RSV_VCL_N14", // HEVC_NAL_VCL_N14 | ||
209 | "RSV_VCL_R15", // HEVC_NAL_VCL_R15 | ||
210 | "BLA_W_LP", // HEVC_NAL_BLA_W_LP | ||
211 | "BLA_W_RADL", // HEVC_NAL_BLA_W_RADL | ||
212 | "BLA_N_LP", // HEVC_NAL_BLA_N_LP | ||
213 | "IDR_W_RADL", // HEVC_NAL_IDR_W_RADL | ||
214 | "IDR_N_LP", // HEVC_NAL_IDR_N_LP | ||
215 | "CRA_NUT", // HEVC_NAL_CRA_NUT | ||
216 | "RSV_IRAP_VCL22", // HEVC_NAL_RSV_IRAP_VCL22 | ||
217 | "RSV_IRAP_VCL23", // HEVC_NAL_RSV_IRAP_VCL23 | ||
218 | "RSV_VCL24", // HEVC_NAL_RSV_VCL24 | ||
219 | "RSV_VCL25", // HEVC_NAL_RSV_VCL25 | ||
220 | "RSV_VCL26", // HEVC_NAL_RSV_VCL26 | ||
221 | "RSV_VCL27", // HEVC_NAL_RSV_VCL27 | ||
222 | "RSV_VCL28", // HEVC_NAL_RSV_VCL28 | ||
223 | "RSV_VCL29", // HEVC_NAL_RSV_VCL29 | ||
224 | "RSV_VCL30", // HEVC_NAL_RSV_VCL30 | ||
225 | "RSV_VCL31", // HEVC_NAL_RSV_VCL31 | ||
226 | "VPS", // HEVC_NAL_VPS | ||
227 | "SPS", // HEVC_NAL_SPS | ||
228 | "PPS", // HEVC_NAL_PPS | ||
229 | "AUD", // HEVC_NAL_AUD | ||
230 | "EOS_NUT", // HEVC_NAL_EOS_NUT | ||
231 | "EOB_NUT", // HEVC_NAL_EOB_NUT | ||
232 | "FD_NUT", // HEVC_NAL_FD_NUT | ||
233 | "SEI_PREFIX", // HEVC_NAL_SEI_PREFIX | ||
234 | "SEI_SUFFIX", // HEVC_NAL_SEI_SUFFIX | ||
235 | "RSV_NVCL41", // HEVC_NAL_RSV_NVCL41 | ||
236 | "RSV_NVCL42", // HEVC_NAL_RSV_NVCL42 | ||
237 | "RSV_NVCL43", // HEVC_NAL_RSV_NVCL43 | ||
238 | "RSV_NVCL44", // HEVC_NAL_RSV_NVCL44 | ||
239 | "RSV_NVCL45", // HEVC_NAL_RSV_NVCL45 | ||
240 | "RSV_NVCL46", // HEVC_NAL_RSV_NVCL46 | ||
241 | "RSV_NVCL47", // HEVC_NAL_RSV_NVCL47 | ||
242 | "UNSPEC48", // HEVC_NAL_UNSPEC48 | ||
243 | "UNSPEC49", // HEVC_NAL_UNSPEC49 | ||
244 | "UNSPEC50", // HEVC_NAL_UNSPEC50 | ||
245 | "UNSPEC51", // HEVC_NAL_UNSPEC51 | ||
246 | "UNSPEC52", // HEVC_NAL_UNSPEC52 | ||
247 | "UNSPEC53", // HEVC_NAL_UNSPEC53 | ||
248 | "UNSPEC54", // HEVC_NAL_UNSPEC54 | ||
249 | "UNSPEC55", // HEVC_NAL_UNSPEC55 | ||
250 | "UNSPEC56", // HEVC_NAL_UNSPEC56 | ||
251 | "UNSPEC57", // HEVC_NAL_UNSPEC57 | ||
252 | "UNSPEC58", // HEVC_NAL_UNSPEC58 | ||
253 | "UNSPEC59", // HEVC_NAL_UNSPEC59 | ||
254 | "UNSPEC60", // HEVC_NAL_UNSPEC60 | ||
255 | "UNSPEC61", // HEVC_NAL_UNSPEC61 | ||
256 | "UNSPEC62", // HEVC_NAL_UNSPEC62 | ||
257 | "UNSPEC63", // HEVC_NAL_UNSPEC63 | ||
258 | }; | ||
259 | |||
260 | 100305 | static const char *hevc_nal_unit_name(int nal_type) | |
261 | { | ||
262 |
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100305 | av_assert0(nal_type >= 0 && nal_type < 64); |
263 | 100305 | return hevc_nal_type_name[nal_type]; | |
264 | } | ||
265 | |||
266 | static const char *const h264_nal_type_name[32] = { | ||
267 | "Unspecified 0", //H264_NAL_UNSPECIFIED | ||
268 | "Coded slice of a non-IDR picture", // H264_NAL_SLICE | ||
269 | "Coded slice data partition A", // H264_NAL_DPA | ||
270 | "Coded slice data partition B", // H264_NAL_DPB | ||
271 | "Coded slice data partition C", // H264_NAL_DPC | ||
272 | "IDR", // H264_NAL_IDR_SLICE | ||
273 | "SEI", // H264_NAL_SEI | ||
274 | "SPS", // H264_NAL_SPS | ||
275 | "PPS", // H264_NAL_PPS | ||
276 | "AUD", // H264_NAL_AUD | ||
277 | "End of sequence", // H264_NAL_END_SEQUENCE | ||
278 | "End of stream", // H264_NAL_END_STREAM | ||
279 | "Filler data", // H264_NAL_FILLER_DATA | ||
280 | "SPS extension", // H264_NAL_SPS_EXT | ||
281 | "Prefix", // H264_NAL_PREFIX | ||
282 | "Subset SPS", // H264_NAL_SUB_SPS | ||
283 | "Depth parameter set", // H264_NAL_DPS | ||
284 | "Reserved 17", // H264_NAL_RESERVED17 | ||
285 | "Reserved 18", // H264_NAL_RESERVED18 | ||
286 | "Auxiliary coded picture without partitioning", // H264_NAL_AUXILIARY_SLICE | ||
287 | "Slice extension", // H264_NAL_EXTEN_SLICE | ||
288 | "Slice extension for a depth view or a 3D-AVC texture view", // H264_NAL_DEPTH_EXTEN_SLICE | ||
289 | "Reserved 22", // H264_NAL_RESERVED22 | ||
290 | "Reserved 23", // H264_NAL_RESERVED23 | ||
291 | "Unspecified 24", // H264_NAL_UNSPECIFIED24 | ||
292 | "Unspecified 25", // H264_NAL_UNSPECIFIED25 | ||
293 | "Unspecified 26", // H264_NAL_UNSPECIFIED26 | ||
294 | "Unspecified 27", // H264_NAL_UNSPECIFIED27 | ||
295 | "Unspecified 28", // H264_NAL_UNSPECIFIED28 | ||
296 | "Unspecified 29", // H264_NAL_UNSPECIFIED29 | ||
297 | "Unspecified 30", // H264_NAL_UNSPECIFIED30 | ||
298 | "Unspecified 31", // H264_NAL_UNSPECIFIED31 | ||
299 | }; | ||
300 | |||
301 | 63508 | static const char *h264_nal_unit_name(int nal_type) | |
302 | { | ||
303 |
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63508 | av_assert0(nal_type >= 0 && nal_type < 32); |
304 | 63508 | return h264_nal_type_name[nal_type]; | |
305 | } | ||
306 | |||
307 | 183048 | static int get_bit_length(H2645NAL *nal, int min_size, int skip_trailing_zeros) | |
308 | { | ||
309 | 183048 | int size = nal->size; | |
310 | 183048 | int trailing_padding = 0; | |
311 | |||
312 |
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229589 | while (skip_trailing_zeros && size > 0 && nal->data[size - 1] == 0) |
313 | 46541 | size--; | |
314 | |||
315 |
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183048 | if (!size) |
316 | ✗ | return 0; | |
317 | |||
318 |
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183048 | if (size <= min_size) { |
319 |
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64 | if (nal->size < min_size) |
320 | ✗ | return AVERROR_INVALIDDATA; | |
321 | 64 | size = min_size; | |
322 | } else { | ||
323 | 182984 | int v = nal->data[size - 1]; | |
324 | /* remove the stop bit and following trailing zeros, | ||
325 | * or nothing for damaged bitstreams */ | ||
326 |
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182984 | if (v) |
327 | 182984 | trailing_padding = ff_ctz(v) + 1; | |
328 | } | ||
329 | |||
330 |
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183048 | if (size > INT_MAX / 8) |
331 | ✗ | return AVERROR(ERANGE); | |
332 | 183048 | size *= 8; | |
333 | |||
334 | 183048 | return size - trailing_padding; | |
335 | } | ||
336 | |||
337 | /** | ||
338 | * @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit, | ||
339 | * 0 otherwise | ||
340 | */ | ||
341 | 19233 | static int vvc_parse_nal_header(H2645NAL *nal, void *logctx) | |
342 | { | ||
343 | 19233 | GetBitContext *gb = &nal->gb; | |
344 | |||
345 |
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19233 | if (get_bits1(gb) != 0) //forbidden_zero_bit |
346 | ✗ | return AVERROR_INVALIDDATA; | |
347 | |||
348 | 19233 | skip_bits1(gb); //nuh_reserved_zero_bit | |
349 | |||
350 | 19233 | nal->nuh_layer_id = get_bits(gb, 6); | |
351 | 19233 | nal->type = get_bits(gb, 5); | |
352 | 19233 | nal->temporal_id = get_bits(gb, 3) - 1; | |
353 |
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19233 | if (nal->temporal_id < 0) |
354 | ✗ | return AVERROR_INVALIDDATA; | |
355 | |||
356 |
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19233 | if ((nal->type >= VVC_IDR_W_RADL && nal->type <= VVC_RSV_IRAP_11) && nal->temporal_id) |
357 | ✗ | return AVERROR_INVALIDDATA; | |
358 | |||
359 | 19233 | av_log(logctx, AV_LOG_DEBUG, | |
360 | "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | ||
361 | nal->type, vvc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | ||
362 | |||
363 | 19233 | return 0; | |
364 | } | ||
365 | |||
366 | 100307 | static int hevc_parse_nal_header(H2645NAL *nal, void *logctx) | |
367 | { | ||
368 | 100307 | GetBitContext *gb = &nal->gb; | |
369 | |||
370 |
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100307 | if (get_bits1(gb) != 0) |
371 | 2 | return AVERROR_INVALIDDATA; | |
372 | |||
373 | 100305 | nal->type = get_bits(gb, 6); | |
374 | |||
375 | 100305 | nal->nuh_layer_id = get_bits(gb, 6); | |
376 | 100305 | nal->temporal_id = get_bits(gb, 3) - 1; | |
377 |
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100305 | if (nal->temporal_id < 0) |
378 | ✗ | return AVERROR_INVALIDDATA; | |
379 | |||
380 | 100305 | av_log(logctx, AV_LOG_DEBUG, | |
381 | "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | ||
382 | nal->type, hevc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | ||
383 | |||
384 | 100305 | return 0; | |
385 | } | ||
386 | |||
387 | 63508 | static int h264_parse_nal_header(H2645NAL *nal, void *logctx) | |
388 | { | ||
389 | 63508 | GetBitContext *gb = &nal->gb; | |
390 | |||
391 |
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|
63508 | if (get_bits1(gb) != 0) |
392 | ✗ | return AVERROR_INVALIDDATA; | |
393 | |||
394 | 63508 | nal->ref_idc = get_bits(gb, 2); | |
395 | 63508 | nal->type = get_bits(gb, 5); | |
396 | |||
397 | 63508 | av_log(logctx, AV_LOG_DEBUG, | |
398 | "nal_unit_type: %d(%s), nal_ref_idc: %d\n", | ||
399 | nal->type, h264_nal_unit_name(nal->type), nal->ref_idc); | ||
400 | |||
401 | 63508 | return 0; | |
402 | } | ||
403 | |||
404 | 173416 | static int find_next_start_code(const uint8_t *buf, const uint8_t *next_avc) | |
405 | { | ||
406 | 173416 | int i = 0; | |
407 | |||
408 |
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|
173416 | if (buf + 3 >= next_avc) |
409 | ✗ | return next_avc - buf; | |
410 | |||
411 |
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|
231788 | while (buf + i + 3 < next_avc) { |
412 |
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|
231788 | if (buf[i] == 0 && buf[i + 1] == 0 && buf[i + 2] == 1) |
413 | 173416 | break; | |
414 | 58372 | i++; | |
415 | } | ||
416 | 173416 | return i + 3; | |
417 | } | ||
418 | |||
419 | 66115 | static void alloc_rbsp_buffer(H2645RBSP *rbsp, unsigned int size, int use_ref) | |
420 | { | ||
421 | 66115 | int min_size = size; | |
422 | |||
423 |
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|
66115 | if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) |
424 | ✗ | goto fail; | |
425 | 66115 | size += AV_INPUT_BUFFER_PADDING_SIZE; | |
426 | |||
427 |
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66115 | if (rbsp->rbsp_buffer_alloc_size >= size && |
428 |
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|
61425 | (!rbsp->rbsp_buffer_ref || av_buffer_is_writable(rbsp->rbsp_buffer_ref))) { |
429 |
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60825 | av_assert0(rbsp->rbsp_buffer); |
430 | 60825 | memset(rbsp->rbsp_buffer + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
431 | 60825 | return; | |
432 | } | ||
433 | |||
434 |
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|
5290 | size = FFMIN(size + size / 16 + 32, INT_MAX); |
435 | |||
436 |
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5290 | if (rbsp->rbsp_buffer_ref) |
437 | 1569 | av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
438 | else | ||
439 | 3721 | av_free(rbsp->rbsp_buffer); | |
440 | |||
441 | 5290 | rbsp->rbsp_buffer = av_mallocz(size); | |
442 |
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|
5290 | if (!rbsp->rbsp_buffer) |
443 | ✗ | goto fail; | |
444 | 5290 | rbsp->rbsp_buffer_alloc_size = size; | |
445 | |||
446 |
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|
5290 | if (use_ref) { |
447 | 1793 | rbsp->rbsp_buffer_ref = av_buffer_create(rbsp->rbsp_buffer, size, | |
448 | NULL, NULL, 0); | ||
449 |
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|
1793 | if (!rbsp->rbsp_buffer_ref) |
450 | ✗ | goto fail; | |
451 | } | ||
452 | |||
453 | 5290 | return; | |
454 | |||
455 | ✗ | fail: | |
456 | ✗ | rbsp->rbsp_buffer_alloc_size = 0; | |
457 | ✗ | if (rbsp->rbsp_buffer_ref) { | |
458 | ✗ | av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
459 | ✗ | rbsp->rbsp_buffer = NULL; | |
460 | } else | ||
461 | ✗ | av_freep(&rbsp->rbsp_buffer); | |
462 | |||
463 | ✗ | return; | |
464 | } | ||
465 | |||
466 | 66115 | int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, | |
467 | void *logctx, int nal_length_size, | ||
468 | enum AVCodecID codec_id, int flags) | ||
469 | { | ||
470 | GetByteContext bc; | ||
471 | 66115 | int consumed, ret = 0; | |
472 |
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66115 | int next_avc = (flags & H2645_FLAG_IS_NALFF) ? 0 : length; |
473 |
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66115 | int64_t padding = (flags & H2645_FLAG_SMALL_PADDING) ? 0 : MAX_MBPAIR_SIZE; |
474 | |||
475 | 66115 | bytestream2_init(&bc, buf, length); | |
476 | 66115 | alloc_rbsp_buffer(&pkt->rbsp, length + padding, !!(flags & H2645_FLAG_USE_REF)); | |
477 | |||
478 |
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66115 | if (!pkt->rbsp.rbsp_buffer) |
479 | ✗ | return AVERROR(ENOMEM); | |
480 | |||
481 | 66115 | pkt->rbsp.rbsp_buffer_size = 0; | |
482 | 66115 | pkt->nb_nals = 0; | |
483 |
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|
249163 | while (bytestream2_get_bytes_left(&bc) >= 4) { |
484 | H2645NAL *nal; | ||
485 | 183049 | int extract_length = 0; | |
486 | 183049 | int skip_trailing_zeros = 1; | |
487 | |||
488 |
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|
183049 | if (bytestream2_tell(&bc) == next_avc) { |
489 | 9633 | int i = 0; | |
490 | 9633 | extract_length = get_nalsize(nal_length_size, | |
491 | bc.buffer, bytestream2_get_bytes_left(&bc), &i, logctx); | ||
492 |
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|
9633 | if (extract_length < 0) |
493 | 1 | return extract_length; | |
494 | |||
495 | 9632 | bytestream2_skip(&bc, nal_length_size); | |
496 | |||
497 | 9632 | next_avc = bytestream2_tell(&bc) + extract_length; | |
498 | } else { | ||
499 | int buf_index; | ||
500 | |||
501 |
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|
173416 | if (bytestream2_tell(&bc) > next_avc) |
502 | ✗ | av_log(logctx, AV_LOG_WARNING, "Exceeded next NALFF position, re-syncing.\n"); | |
503 | |||
504 | /* search start code */ | ||
505 | 173416 | buf_index = find_next_start_code(bc.buffer, buf + next_avc); | |
506 | |||
507 | 173416 | bytestream2_skip(&bc, buf_index); | |
508 | |||
509 |
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|
173416 | if (!bytestream2_get_bytes_left(&bc)) { |
510 | ✗ | if (pkt->nb_nals > 0) { | |
511 | // No more start codes: we discarded some irrelevant | ||
512 | // bytes at the end of the packet. | ||
513 | ✗ | return 0; | |
514 | } else { | ||
515 | ✗ | av_log(logctx, AV_LOG_ERROR, "No start code is found.\n"); | |
516 | ✗ | return AVERROR_INVALIDDATA; | |
517 | } | ||
518 | } | ||
519 | |||
520 |
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|
173416 | extract_length = FFMIN(bytestream2_get_bytes_left(&bc), next_avc - bytestream2_tell(&bc)); |
521 | |||
522 |
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|
173416 | if (bytestream2_tell(&bc) >= next_avc) { |
523 | /* skip to the start of the next NAL */ | ||
524 | ✗ | bytestream2_skip(&bc, next_avc - bytestream2_tell(&bc)); | |
525 | ✗ | continue; | |
526 | } | ||
527 | } | ||
528 | |||
529 |
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|
183048 | if (pkt->nals_allocated < pkt->nb_nals + 1) { |
530 | 14487 | int new_size = pkt->nals_allocated + 1; | |
531 | void *tmp; | ||
532 | |||
533 |
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|
14487 | if (new_size >= INT_MAX / sizeof(*pkt->nals)) |
534 | ✗ | return AVERROR(ENOMEM); | |
535 | |||
536 | 14487 | tmp = av_fast_realloc(pkt->nals, &pkt->nal_buffer_size, new_size * sizeof(*pkt->nals)); | |
537 |
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14487 | if (!tmp) |
538 | ✗ | return AVERROR(ENOMEM); | |
539 | |||
540 | 14487 | pkt->nals = tmp; | |
541 | 14487 | memset(pkt->nals + pkt->nals_allocated, 0, sizeof(*pkt->nals)); | |
542 | |||
543 | 14487 | nal = &pkt->nals[pkt->nb_nals]; | |
544 |
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|
14487 | nal->skipped_bytes_pos_size = FFMIN(1024, extract_length/3+1); // initial buffer size |
545 | 14487 | nal->skipped_bytes_pos = av_malloc_array(nal->skipped_bytes_pos_size, sizeof(*nal->skipped_bytes_pos)); | |
546 |
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|
14487 | if (!nal->skipped_bytes_pos) |
547 | ✗ | return AVERROR(ENOMEM); | |
548 | |||
549 | 14487 | pkt->nals_allocated = new_size; | |
550 | } | ||
551 | 183048 | nal = &pkt->nals[pkt->nb_nals]; | |
552 | |||
553 | 183048 | consumed = ff_h2645_extract_rbsp(bc.buffer, extract_length, &pkt->rbsp, nal, | |
554 | 183048 | !!(flags & H2645_FLAG_SMALL_PADDING)); | |
555 |
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183048 | if (consumed < 0) |
556 | ✗ | return consumed; | |
557 | |||
558 |
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183048 | if ((flags & H2645_FLAG_IS_NALFF) && (extract_length != consumed) && extract_length) |
559 | 12 | av_log(logctx, AV_LOG_DEBUG, | |
560 | "NALFF: Consumed only %d bytes instead of %d\n", | ||
561 | consumed, extract_length); | ||
562 | |||
563 | 183048 | bytestream2_skip(&bc, consumed); | |
564 | |||
565 | /* see commit 3566042a0 */ | ||
566 |
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299984 | if (bytestream2_get_bytes_left(&bc) >= 4 && |
567 | 116936 | bytestream2_peek_be32(&bc) == 0x000001E0) | |
568 | 4 | skip_trailing_zeros = 0; | |
569 | |||
570 |
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183048 | nal->size_bits = get_bit_length(nal, 1 + (codec_id == AV_CODEC_ID_HEVC), |
571 | skip_trailing_zeros); | ||
572 | |||
573 |
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183048 | if (nal->size <= 0 || nal->size_bits <= 0) |
574 | ✗ | continue; | |
575 | |||
576 | 183048 | ret = init_get_bits(&nal->gb, nal->data, nal->size_bits); | |
577 |
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|
183048 | if (ret < 0) |
578 | ✗ | return ret; | |
579 | |||
580 | /* Reset type in case it contains a stale value from a previously parsed NAL */ | ||
581 | 183048 | nal->type = 0; | |
582 | |||
583 |
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183048 | if (codec_id == AV_CODEC_ID_VVC) |
584 | 19233 | ret = vvc_parse_nal_header(nal, logctx); | |
585 |
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163815 | else if (codec_id == AV_CODEC_ID_HEVC) { |
586 | 100307 | ret = hevc_parse_nal_header(nal, logctx); | |
587 |
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100307 | if (nal->nuh_layer_id == 63) |
588 | ✗ | continue; | |
589 | } else | ||
590 | 63508 | ret = h264_parse_nal_header(nal, logctx); | |
591 |
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183048 | if (ret < 0) { |
592 | 2 | av_log(logctx, AV_LOG_WARNING, | |
593 | "Failed to parse header of NALU (type %d): \"%s\". Skipping NALU.\n", | ||
594 | 2 | nal->type, av_err2str(ret)); | |
595 | 2 | continue; | |
596 | } | ||
597 | |||
598 | 183046 | pkt->nb_nals++; | |
599 | } | ||
600 | |||
601 | 66114 | return 0; | |
602 | } | ||
603 | |||
604 | 4120 | void ff_h2645_packet_uninit(H2645Packet *pkt) | |
605 | { | ||
606 | int i; | ||
607 |
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|
18607 | for (i = 0; i < pkt->nals_allocated; i++) { |
608 | 14487 | av_freep(&pkt->nals[i].skipped_bytes_pos); | |
609 | } | ||
610 | 4120 | av_freep(&pkt->nals); | |
611 | 4120 | pkt->nals_allocated = pkt->nal_buffer_size = 0; | |
612 |
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4120 | if (pkt->rbsp.rbsp_buffer_ref) { |
613 | 224 | av_buffer_unref(&pkt->rbsp.rbsp_buffer_ref); | |
614 | 224 | pkt->rbsp.rbsp_buffer = NULL; | |
615 | } else | ||
616 | 3896 | av_freep(&pkt->rbsp.rbsp_buffer); | |
617 | 4120 | pkt->rbsp.rbsp_buffer_alloc_size = pkt->rbsp.rbsp_buffer_size = 0; | |
618 | 4120 | } | |
619 |