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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/intmath.h" | ||
26 | #include "libavutil/intreadwrite.h" | ||
27 | #include "libavutil/mem.h" | ||
28 | |||
29 | #include "bytestream.h" | ||
30 | #include "h264.h" | ||
31 | #include "h2645_parse.h" | ||
32 | #include "vvc.h" | ||
33 | |||
34 | #include "hevc/hevc.h" | ||
35 | |||
36 | 231049 | int ff_h2645_extract_rbsp(const uint8_t *src, int length, | |
37 | H2645RBSP *rbsp, H2645NAL *nal, int small_padding) | ||
38 | { | ||
39 | int i, si, di; | ||
40 | uint8_t *dst; | ||
41 | |||
42 | 231049 | nal->skipped_bytes = 0; | |
43 | #define STARTCODE_TEST \ | ||
44 | if (i + 2 < length && src[i + 1] == 0 && \ | ||
45 | (src[i + 2] == 3 || src[i + 2] == 1)) { \ | ||
46 | if (src[i + 2] == 1) { \ | ||
47 | /* startcode, so we must be past the end */ \ | ||
48 | length = i; \ | ||
49 | } \ | ||
50 | break; \ | ||
51 | } | ||
52 | #if HAVE_FAST_UNALIGNED | ||
53 | #define FIND_FIRST_ZERO \ | ||
54 | if (i > 0 && !src[i]) \ | ||
55 | i--; \ | ||
56 | while (src[i]) \ | ||
57 | i++ | ||
58 | #if HAVE_FAST_64BIT | ||
59 |
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51134968 | for (i = 0; i + 1 < length; i += 9) { |
60 | 100531943 | if (!((~AV_RN64(src + i) & | |
61 |
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51031403 | (AV_RN64(src + i) - 0x0100010001000101ULL)) & |
62 | 0x8000800080008080ULL)) | ||
63 | 49500540 | continue; | |
64 |
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6271121 | FIND_FIRST_ZERO; |
65 |
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1530863 | STARTCODE_TEST; |
66 | 1403379 | i -= 7; | |
67 | } | ||
68 | #else | ||
69 | for (i = 0; i + 1 < length; i += 5) { | ||
70 | if (!((~AV_RN32(src + i) & | ||
71 | (AV_RN32(src + i) - 0x01000101U)) & | ||
72 | 0x80008080U)) | ||
73 | continue; | ||
74 | FIND_FIRST_ZERO; | ||
75 | STARTCODE_TEST; | ||
76 | i -= 3; | ||
77 | } | ||
78 | #endif /* HAVE_FAST_64BIT */ | ||
79 | #else | ||
80 | for (i = 0; i + 1 < length; i += 2) { | ||
81 | if (src[i]) | ||
82 | continue; | ||
83 | if (i > 0 && src[i - 1] == 0) | ||
84 | i--; | ||
85 | STARTCODE_TEST; | ||
86 | } | ||
87 | #endif /* HAVE_FAST_UNALIGNED */ | ||
88 | |||
89 |
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231049 | if (i >= length - 1 && small_padding) { // no escaped 0 |
90 | 172744 | nal->data = | |
91 | 172744 | nal->raw_data = src; | |
92 | 172744 | nal->size = | |
93 | 172744 | nal->raw_size = length; | |
94 | 172744 | return length; | |
95 |
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58305 | } else if (i > length) |
96 | 23993 | i = length; | |
97 | |||
98 | 58305 | dst = &rbsp->rbsp_buffer[rbsp->rbsp_buffer_size]; | |
99 | |||
100 | 58305 | memcpy(dst, src, i); | |
101 | 58305 | si = di = i; | |
102 |
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10089458 | while (si + 2 < length) { |
103 | // remove escapes (very rare 1:2^22) | ||
104 |
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10037259 | if (src[si + 2] > 3) { |
105 | 9748067 | dst[di++] = src[si++]; | |
106 | 9748067 | dst[di++] = src[si++]; | |
107 |
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289192 | } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) { |
108 |
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33249 | if (src[si + 2] == 3) { // escape |
109 | 27143 | dst[di++] = 0; | |
110 | 27143 | dst[di++] = 0; | |
111 | 27143 | si += 3; | |
112 | |||
113 |
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27143 | if (nal->skipped_bytes_pos) { |
114 | 22937 | nal->skipped_bytes++; | |
115 |
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22937 | if (nal->skipped_bytes_pos_size < nal->skipped_bytes) { |
116 | 22 | nal->skipped_bytes_pos_size *= 2; | |
117 |
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22 | av_assert0(nal->skipped_bytes_pos_size >= nal->skipped_bytes); |
118 | 22 | av_reallocp_array(&nal->skipped_bytes_pos, | |
119 | 22 | nal->skipped_bytes_pos_size, | |
120 | sizeof(*nal->skipped_bytes_pos)); | ||
121 |
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22 | if (!nal->skipped_bytes_pos) { |
122 | ✗ | nal->skipped_bytes_pos_size = 0; | |
123 | ✗ | return AVERROR(ENOMEM); | |
124 | } | ||
125 | } | ||
126 |
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22937 | if (nal->skipped_bytes_pos) |
127 | 22937 | nal->skipped_bytes_pos[nal->skipped_bytes-1] = di - 1; | |
128 | } | ||
129 | 27143 | continue; | |
130 | } else // next start code | ||
131 | 6106 | goto nsc; | |
132 | } | ||
133 | |||
134 | 10004010 | dst[di++] = src[si++]; | |
135 | } | ||
136 |
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57654 | while (si < length) |
137 | 5455 | dst[di++] = src[si++]; | |
138 | |||
139 | 52199 | nsc: | |
140 | 58305 | memset(dst + di, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
141 | |||
142 | 58305 | nal->data = dst; | |
143 | 58305 | nal->size = di; | |
144 | 58305 | nal->raw_data = src; | |
145 | 58305 | nal->raw_size = si; | |
146 | 58305 | rbsp->rbsp_buffer_size += si; | |
147 | |||
148 | 58305 | return si; | |
149 | } | ||
150 | |||
151 | static const char *const vvc_nal_type_name[32] = { | ||
152 | "TRAIL_NUT", // VVC_TRAIL_NUT | ||
153 | "STSA_NUT", // VVC_STSA_NUT | ||
154 | "RADL_NUT", // VVC_RADL_NUT | ||
155 | "RASL_NUT", // VVC_RASL_NUT | ||
156 | "RSV_VCL4", // VVC_RSV_VCL_4 | ||
157 | "RSV_VCL5", // VVC_RSV_VCL_5 | ||
158 | "RSV_VCL6", // VVC_RSV_VCL_6 | ||
159 | "IDR_W_RADL", // VVC_IDR_W_RADL | ||
160 | "IDR_N_LP", // VVC_IDR_N_LP | ||
161 | "CRA_NUT", // VVC_CRA_NUT | ||
162 | "GDR_NUT", // VVC_GDR_NUT | ||
163 | "RSV_IRAP_11", // VVC_RSV_IRAP_11 | ||
164 | "OPI_NUT", // VVC_OPI_NUT | ||
165 | "DCI_NUT", // VVC_DCI_NUT | ||
166 | "VPS_NUT", // VVC_VPS_NUT | ||
167 | "SPS_NUT", // VVC_SPS_NUT | ||
168 | "PPS_NUT", // VVC_PPS_NUT | ||
169 | "APS_PREFIX", // VVC_PREFIX_APS_NUT | ||
170 | "APS_SUFFIX", // VVC_SUFFIX_APS_NUT | ||
171 | "PH_NUT", // VVC_PH_NUT | ||
172 | "AUD_NUT", // VVC_AUD_NUT | ||
173 | "EOS_NUT", // VVC_EOS_NUT | ||
174 | "EOB_NUT", // VVC_EOB_NUT | ||
175 | "SEI_PREFIX", // VVC_PREFIX_SEI_NUT | ||
176 | "SEI_SUFFIX", // VVC_SUFFIX_SEI_NUT | ||
177 | "FD_NUT", // VVC_FD_NUT | ||
178 | "RSV_NVCL26", // VVC_RSV_NVCL_26 | ||
179 | "RSV_NVCL27", // VVC_RSV_NVCL_27 | ||
180 | "UNSPEC28", // VVC_UNSPEC_28 | ||
181 | "UNSPEC29", // VVC_UNSPEC_29 | ||
182 | "UNSPEC30", // VVC_UNSPEC_30 | ||
183 | "UNSPEC31", // VVC_UNSPEC_31 | ||
184 | }; | ||
185 | |||
186 | 18329 | static const char *vvc_nal_unit_name(int nal_type) | |
187 | { | ||
188 |
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18329 | av_assert0(nal_type >= 0 && nal_type < 32); |
189 | 18329 | return vvc_nal_type_name[nal_type]; | |
190 | } | ||
191 | |||
192 | static const char *const hevc_nal_type_name[64] = { | ||
193 | "TRAIL_N", // HEVC_NAL_TRAIL_N | ||
194 | "TRAIL_R", // HEVC_NAL_TRAIL_R | ||
195 | "TSA_N", // HEVC_NAL_TSA_N | ||
196 | "TSA_R", // HEVC_NAL_TSA_R | ||
197 | "STSA_N", // HEVC_NAL_STSA_N | ||
198 | "STSA_R", // HEVC_NAL_STSA_R | ||
199 | "RADL_N", // HEVC_NAL_RADL_N | ||
200 | "RADL_R", // HEVC_NAL_RADL_R | ||
201 | "RASL_N", // HEVC_NAL_RASL_N | ||
202 | "RASL_R", // HEVC_NAL_RASL_R | ||
203 | "RSV_VCL_N10", // HEVC_NAL_VCL_N10 | ||
204 | "RSV_VCL_R11", // HEVC_NAL_VCL_R11 | ||
205 | "RSV_VCL_N12", // HEVC_NAL_VCL_N12 | ||
206 | "RSV_VLC_R13", // HEVC_NAL_VCL_R13 | ||
207 | "RSV_VCL_N14", // HEVC_NAL_VCL_N14 | ||
208 | "RSV_VCL_R15", // HEVC_NAL_VCL_R15 | ||
209 | "BLA_W_LP", // HEVC_NAL_BLA_W_LP | ||
210 | "BLA_W_RADL", // HEVC_NAL_BLA_W_RADL | ||
211 | "BLA_N_LP", // HEVC_NAL_BLA_N_LP | ||
212 | "IDR_W_RADL", // HEVC_NAL_IDR_W_RADL | ||
213 | "IDR_N_LP", // HEVC_NAL_IDR_N_LP | ||
214 | "CRA_NUT", // HEVC_NAL_CRA_NUT | ||
215 | "RSV_IRAP_VCL22", // HEVC_NAL_RSV_IRAP_VCL22 | ||
216 | "RSV_IRAP_VCL23", // HEVC_NAL_RSV_IRAP_VCL23 | ||
217 | "RSV_VCL24", // HEVC_NAL_RSV_VCL24 | ||
218 | "RSV_VCL25", // HEVC_NAL_RSV_VCL25 | ||
219 | "RSV_VCL26", // HEVC_NAL_RSV_VCL26 | ||
220 | "RSV_VCL27", // HEVC_NAL_RSV_VCL27 | ||
221 | "RSV_VCL28", // HEVC_NAL_RSV_VCL28 | ||
222 | "RSV_VCL29", // HEVC_NAL_RSV_VCL29 | ||
223 | "RSV_VCL30", // HEVC_NAL_RSV_VCL30 | ||
224 | "RSV_VCL31", // HEVC_NAL_RSV_VCL31 | ||
225 | "VPS", // HEVC_NAL_VPS | ||
226 | "SPS", // HEVC_NAL_SPS | ||
227 | "PPS", // HEVC_NAL_PPS | ||
228 | "AUD", // HEVC_NAL_AUD | ||
229 | "EOS_NUT", // HEVC_NAL_EOS_NUT | ||
230 | "EOB_NUT", // HEVC_NAL_EOB_NUT | ||
231 | "FD_NUT", // HEVC_NAL_FD_NUT | ||
232 | "SEI_PREFIX", // HEVC_NAL_SEI_PREFIX | ||
233 | "SEI_SUFFIX", // HEVC_NAL_SEI_SUFFIX | ||
234 | "RSV_NVCL41", // HEVC_NAL_RSV_NVCL41 | ||
235 | "RSV_NVCL42", // HEVC_NAL_RSV_NVCL42 | ||
236 | "RSV_NVCL43", // HEVC_NAL_RSV_NVCL43 | ||
237 | "RSV_NVCL44", // HEVC_NAL_RSV_NVCL44 | ||
238 | "RSV_NVCL45", // HEVC_NAL_RSV_NVCL45 | ||
239 | "RSV_NVCL46", // HEVC_NAL_RSV_NVCL46 | ||
240 | "RSV_NVCL47", // HEVC_NAL_RSV_NVCL47 | ||
241 | "UNSPEC48", // HEVC_NAL_UNSPEC48 | ||
242 | "UNSPEC49", // HEVC_NAL_UNSPEC49 | ||
243 | "UNSPEC50", // HEVC_NAL_UNSPEC50 | ||
244 | "UNSPEC51", // HEVC_NAL_UNSPEC51 | ||
245 | "UNSPEC52", // HEVC_NAL_UNSPEC52 | ||
246 | "UNSPEC53", // HEVC_NAL_UNSPEC53 | ||
247 | "UNSPEC54", // HEVC_NAL_UNSPEC54 | ||
248 | "UNSPEC55", // HEVC_NAL_UNSPEC55 | ||
249 | "UNSPEC56", // HEVC_NAL_UNSPEC56 | ||
250 | "UNSPEC57", // HEVC_NAL_UNSPEC57 | ||
251 | "UNSPEC58", // HEVC_NAL_UNSPEC58 | ||
252 | "UNSPEC59", // HEVC_NAL_UNSPEC59 | ||
253 | "UNSPEC60", // HEVC_NAL_UNSPEC60 | ||
254 | "UNSPEC61", // HEVC_NAL_UNSPEC61 | ||
255 | "UNSPEC62", // HEVC_NAL_UNSPEC62 | ||
256 | "UNSPEC63", // HEVC_NAL_UNSPEC63 | ||
257 | }; | ||
258 | |||
259 | 99727 | static const char *hevc_nal_unit_name(int nal_type) | |
260 | { | ||
261 |
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99727 | av_assert0(nal_type >= 0 && nal_type < 64); |
262 | 99727 | return hevc_nal_type_name[nal_type]; | |
263 | } | ||
264 | |||
265 | static const char *const h264_nal_type_name[32] = { | ||
266 | "Unspecified 0", //H264_NAL_UNSPECIFIED | ||
267 | "Coded slice of a non-IDR picture", // H264_NAL_SLICE | ||
268 | "Coded slice data partition A", // H264_NAL_DPA | ||
269 | "Coded slice data partition B", // H264_NAL_DPB | ||
270 | "Coded slice data partition C", // H264_NAL_DPC | ||
271 | "IDR", // H264_NAL_IDR_SLICE | ||
272 | "SEI", // H264_NAL_SEI | ||
273 | "SPS", // H264_NAL_SPS | ||
274 | "PPS", // H264_NAL_PPS | ||
275 | "AUD", // H264_NAL_AUD | ||
276 | "End of sequence", // H264_NAL_END_SEQUENCE | ||
277 | "End of stream", // H264_NAL_END_STREAM | ||
278 | "Filler data", // H264_NAL_FILLER_DATA | ||
279 | "SPS extension", // H264_NAL_SPS_EXT | ||
280 | "Prefix", // H264_NAL_PREFIX | ||
281 | "Subset SPS", // H264_NAL_SUB_SPS | ||
282 | "Depth parameter set", // H264_NAL_DPS | ||
283 | "Reserved 17", // H264_NAL_RESERVED17 | ||
284 | "Reserved 18", // H264_NAL_RESERVED18 | ||
285 | "Auxiliary coded picture without partitioning", // H264_NAL_AUXILIARY_SLICE | ||
286 | "Slice extension", // H264_NAL_EXTEN_SLICE | ||
287 | "Slice extension for a depth view or a 3D-AVC texture view", // H264_NAL_DEPTH_EXTEN_SLICE | ||
288 | "Reserved 22", // H264_NAL_RESERVED22 | ||
289 | "Reserved 23", // H264_NAL_RESERVED23 | ||
290 | "Unspecified 24", // H264_NAL_UNSPECIFIED24 | ||
291 | "Unspecified 25", // H264_NAL_UNSPECIFIED25 | ||
292 | "Unspecified 26", // H264_NAL_UNSPECIFIED26 | ||
293 | "Unspecified 27", // H264_NAL_UNSPECIFIED27 | ||
294 | "Unspecified 28", // H264_NAL_UNSPECIFIED28 | ||
295 | "Unspecified 29", // H264_NAL_UNSPECIFIED29 | ||
296 | "Unspecified 30", // H264_NAL_UNSPECIFIED30 | ||
297 | "Unspecified 31", // H264_NAL_UNSPECIFIED31 | ||
298 | }; | ||
299 | |||
300 | 63237 | static const char *h264_nal_unit_name(int nal_type) | |
301 | { | ||
302 |
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63237 | av_assert0(nal_type >= 0 && nal_type < 32); |
303 | 63237 | return h264_nal_type_name[nal_type]; | |
304 | } | ||
305 | |||
306 | 181295 | static int get_bit_length(H2645NAL *nal, int min_size, int skip_trailing_zeros) | |
307 | { | ||
308 | 181295 | int size = nal->size; | |
309 | 181295 | int trailing_padding = 0; | |
310 | |||
311 |
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227083 | while (skip_trailing_zeros && size > 0 && nal->data[size - 1] == 0) |
312 | 45788 | size--; | |
313 | |||
314 |
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181295 | if (!size) |
315 | ✗ | return 0; | |
316 | |||
317 |
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181295 | if (size <= min_size) { |
318 |
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64 | if (nal->size < min_size) |
319 | ✗ | return AVERROR_INVALIDDATA; | |
320 | 64 | size = min_size; | |
321 | } else { | ||
322 | 181231 | int v = nal->data[size - 1]; | |
323 | /* remove the stop bit and following trailing zeros, | ||
324 | * or nothing for damaged bitstreams */ | ||
325 |
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181231 | if (v) |
326 | 181231 | trailing_padding = ff_ctz(v) + 1; | |
327 | } | ||
328 | |||
329 |
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181295 | if (size > INT_MAX / 8) |
330 | ✗ | return AVERROR(ERANGE); | |
331 | 181295 | size *= 8; | |
332 | |||
333 | 181295 | return size - trailing_padding; | |
334 | } | ||
335 | |||
336 | /** | ||
337 | * @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit, | ||
338 | * 0 otherwise | ||
339 | */ | ||
340 | 18329 | static int vvc_parse_nal_header(H2645NAL *nal, void *logctx) | |
341 | { | ||
342 | 18329 | GetBitContext *gb = &nal->gb; | |
343 | |||
344 |
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18329 | if (get_bits1(gb) != 0) //forbidden_zero_bit |
345 | ✗ | return AVERROR_INVALIDDATA; | |
346 | |||
347 | 18329 | skip_bits1(gb); //nuh_reserved_zero_bit | |
348 | |||
349 | 18329 | nal->nuh_layer_id = get_bits(gb, 6); | |
350 | 18329 | nal->type = get_bits(gb, 5); | |
351 | 18329 | nal->temporal_id = get_bits(gb, 3) - 1; | |
352 |
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18329 | if (nal->temporal_id < 0) |
353 | ✗ | return AVERROR_INVALIDDATA; | |
354 | |||
355 |
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18329 | if ((nal->type >= VVC_IDR_W_RADL && nal->type <= VVC_RSV_IRAP_11) && nal->temporal_id) |
356 | ✗ | return AVERROR_INVALIDDATA; | |
357 | |||
358 | 18329 | av_log(logctx, AV_LOG_DEBUG, | |
359 | "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | ||
360 | nal->type, vvc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | ||
361 | |||
362 | 18329 | return 0; | |
363 | } | ||
364 | |||
365 | 99729 | static int hevc_parse_nal_header(H2645NAL *nal, void *logctx) | |
366 | { | ||
367 | 99729 | GetBitContext *gb = &nal->gb; | |
368 | |||
369 |
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99729 | if (get_bits1(gb) != 0) |
370 | 2 | return AVERROR_INVALIDDATA; | |
371 | |||
372 | 99727 | nal->type = get_bits(gb, 6); | |
373 | |||
374 | 99727 | nal->nuh_layer_id = get_bits(gb, 6); | |
375 | 99727 | nal->temporal_id = get_bits(gb, 3) - 1; | |
376 |
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99727 | if (nal->temporal_id < 0) |
377 | ✗ | return AVERROR_INVALIDDATA; | |
378 | |||
379 | 99727 | av_log(logctx, AV_LOG_DEBUG, | |
380 | "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | ||
381 | nal->type, hevc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | ||
382 | |||
383 | 99727 | return 0; | |
384 | } | ||
385 | |||
386 | 63237 | static int h264_parse_nal_header(H2645NAL *nal, void *logctx) | |
387 | { | ||
388 | 63237 | GetBitContext *gb = &nal->gb; | |
389 | |||
390 |
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63237 | if (get_bits1(gb) != 0) |
391 | ✗ | return AVERROR_INVALIDDATA; | |
392 | |||
393 | 63237 | nal->ref_idc = get_bits(gb, 2); | |
394 | 63237 | nal->type = get_bits(gb, 5); | |
395 | |||
396 | 63237 | av_log(logctx, AV_LOG_DEBUG, | |
397 | "nal_unit_type: %d(%s), nal_ref_idc: %d\n", | ||
398 | nal->type, h264_nal_unit_name(nal->type), nal->ref_idc); | ||
399 | |||
400 | 63237 | return 0; | |
401 | } | ||
402 | |||
403 | 172086 | static int find_next_start_code(const uint8_t *buf, const uint8_t *next_avc) | |
404 | { | ||
405 | 172086 | int i = 0; | |
406 | |||
407 |
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172086 | if (buf + 3 >= next_avc) |
408 | ✗ | return next_avc - buf; | |
409 | |||
410 |
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230088 | while (buf + i + 3 < next_avc) { |
411 |
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230088 | if (buf[i] == 0 && buf[i + 1] == 0 && buf[i + 2] == 1) |
412 | 172086 | break; | |
413 | 58002 | i++; | |
414 | } | ||
415 | 172086 | return i + 3; | |
416 | } | ||
417 | |||
418 | 65433 | static void alloc_rbsp_buffer(H2645RBSP *rbsp, unsigned int size, int use_ref) | |
419 | { | ||
420 | 65433 | int min_size = size; | |
421 | |||
422 |
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65433 | if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) |
423 | ✗ | goto fail; | |
424 | 65433 | size += AV_INPUT_BUFFER_PADDING_SIZE; | |
425 | |||
426 |
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65433 | if (rbsp->rbsp_buffer_alloc_size >= size && |
427 |
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60942 | (!rbsp->rbsp_buffer_ref || av_buffer_is_writable(rbsp->rbsp_buffer_ref))) { |
428 |
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60352 | av_assert0(rbsp->rbsp_buffer); |
429 | 60352 | memset(rbsp->rbsp_buffer + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
430 | 60352 | return; | |
431 | } | ||
432 | |||
433 |
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5081 | size = FFMIN(size + size / 16 + 32, INT_MAX); |
434 | |||
435 |
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5081 | if (rbsp->rbsp_buffer_ref) |
436 | 1541 | av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
437 | else | ||
438 | 3540 | av_free(rbsp->rbsp_buffer); | |
439 | |||
440 | 5081 | rbsp->rbsp_buffer = av_mallocz(size); | |
441 |
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5081 | if (!rbsp->rbsp_buffer) |
442 | ✗ | goto fail; | |
443 | 5081 | rbsp->rbsp_buffer_alloc_size = size; | |
444 | |||
445 |
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5081 | if (use_ref) { |
446 | 1752 | rbsp->rbsp_buffer_ref = av_buffer_create(rbsp->rbsp_buffer, size, | |
447 | NULL, NULL, 0); | ||
448 |
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|
1752 | if (!rbsp->rbsp_buffer_ref) |
449 | ✗ | goto fail; | |
450 | } | ||
451 | |||
452 | 5081 | return; | |
453 | |||
454 | ✗ | fail: | |
455 | ✗ | rbsp->rbsp_buffer_alloc_size = 0; | |
456 | ✗ | if (rbsp->rbsp_buffer_ref) { | |
457 | ✗ | av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
458 | ✗ | rbsp->rbsp_buffer = NULL; | |
459 | } else | ||
460 | ✗ | av_freep(&rbsp->rbsp_buffer); | |
461 | |||
462 | ✗ | return; | |
463 | } | ||
464 | |||
465 | 65433 | int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, | |
466 | void *logctx, int nal_length_size, | ||
467 | enum AVCodecID codec_id, int flags) | ||
468 | { | ||
469 | GetByteContext bc; | ||
470 | 65433 | int consumed, ret = 0; | |
471 |
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65433 | int next_avc = (flags & H2645_FLAG_IS_NALFF) ? 0 : length; |
472 |
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65433 | int64_t padding = (flags & H2645_FLAG_SMALL_PADDING) ? 0 : MAX_MBPAIR_SIZE; |
473 | |||
474 | 65433 | bytestream2_init(&bc, buf, length); | |
475 | 65433 | alloc_rbsp_buffer(&pkt->rbsp, length + padding, !!(flags & H2645_FLAG_USE_REF)); | |
476 | |||
477 |
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65433 | if (!pkt->rbsp.rbsp_buffer) |
478 | ✗ | return AVERROR(ENOMEM); | |
479 | |||
480 | 65433 | pkt->rbsp.rbsp_buffer_size = 0; | |
481 | 65433 | pkt->nb_nals = 0; | |
482 |
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|
246728 | while (bytestream2_get_bytes_left(&bc) >= 4) { |
483 | H2645NAL *nal; | ||
484 | 181296 | int extract_length = 0; | |
485 | 181296 | int skip_trailing_zeros = 1; | |
486 | |||
487 |
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181296 | if (bytestream2_tell(&bc) == next_avc) { |
488 | 9210 | int i = 0; | |
489 | 9210 | extract_length = get_nalsize(nal_length_size, | |
490 | bc.buffer, bytestream2_get_bytes_left(&bc), &i, logctx); | ||
491 |
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9210 | if (extract_length < 0) |
492 | 1 | return extract_length; | |
493 | |||
494 | 9209 | bytestream2_skip(&bc, nal_length_size); | |
495 | |||
496 | 9209 | next_avc = bytestream2_tell(&bc) + extract_length; | |
497 | } else { | ||
498 | int buf_index; | ||
499 | |||
500 |
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|
172086 | if (bytestream2_tell(&bc) > next_avc) |
501 | ✗ | av_log(logctx, AV_LOG_WARNING, "Exceeded next NALFF position, re-syncing.\n"); | |
502 | |||
503 | /* search start code */ | ||
504 | 172086 | buf_index = find_next_start_code(bc.buffer, buf + next_avc); | |
505 | |||
506 | 172086 | bytestream2_skip(&bc, buf_index); | |
507 | |||
508 |
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|
172086 | if (!bytestream2_get_bytes_left(&bc)) { |
509 | ✗ | if (pkt->nb_nals > 0) { | |
510 | // No more start codes: we discarded some irrelevant | ||
511 | // bytes at the end of the packet. | ||
512 | ✗ | return 0; | |
513 | } else { | ||
514 | ✗ | av_log(logctx, AV_LOG_ERROR, "No start code is found.\n"); | |
515 | ✗ | return AVERROR_INVALIDDATA; | |
516 | } | ||
517 | } | ||
518 | |||
519 |
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|
172086 | extract_length = FFMIN(bytestream2_get_bytes_left(&bc), next_avc - bytestream2_tell(&bc)); |
520 | |||
521 |
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|
172086 | if (bytestream2_tell(&bc) >= next_avc) { |
522 | /* skip to the start of the next NAL */ | ||
523 | ✗ | bytestream2_skip(&bc, next_avc - bytestream2_tell(&bc)); | |
524 | ✗ | continue; | |
525 | } | ||
526 | } | ||
527 | |||
528 |
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181295 | if (pkt->nals_allocated < pkt->nb_nals + 1) { |
529 | 13897 | int new_size = pkt->nals_allocated + 1; | |
530 | void *tmp; | ||
531 | |||
532 |
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13897 | if (new_size >= INT_MAX / sizeof(*pkt->nals)) |
533 | ✗ | return AVERROR(ENOMEM); | |
534 | |||
535 | 13897 | tmp = av_fast_realloc(pkt->nals, &pkt->nal_buffer_size, new_size * sizeof(*pkt->nals)); | |
536 |
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13897 | if (!tmp) |
537 | ✗ | return AVERROR(ENOMEM); | |
538 | |||
539 | 13897 | pkt->nals = tmp; | |
540 | 13897 | memset(pkt->nals + pkt->nals_allocated, 0, sizeof(*pkt->nals)); | |
541 | |||
542 | 13897 | nal = &pkt->nals[pkt->nb_nals]; | |
543 |
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13897 | nal->skipped_bytes_pos_size = FFMIN(1024, extract_length/3+1); // initial buffer size |
544 | 13897 | nal->skipped_bytes_pos = av_malloc_array(nal->skipped_bytes_pos_size, sizeof(*nal->skipped_bytes_pos)); | |
545 |
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|
13897 | if (!nal->skipped_bytes_pos) |
546 | ✗ | return AVERROR(ENOMEM); | |
547 | |||
548 | 13897 | pkt->nals_allocated = new_size; | |
549 | } | ||
550 | 181295 | nal = &pkt->nals[pkt->nb_nals]; | |
551 | |||
552 | 181295 | consumed = ff_h2645_extract_rbsp(bc.buffer, extract_length, &pkt->rbsp, nal, | |
553 | 181295 | !!(flags & H2645_FLAG_SMALL_PADDING)); | |
554 |
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181295 | if (consumed < 0) |
555 | ✗ | return consumed; | |
556 | |||
557 |
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181295 | if ((flags & H2645_FLAG_IS_NALFF) && (extract_length != consumed) && extract_length) |
558 | 12 | av_log(logctx, AV_LOG_DEBUG, | |
559 | "NALFF: Consumed only %d bytes instead of %d\n", | ||
560 | consumed, extract_length); | ||
561 | |||
562 | 181295 | bytestream2_skip(&bc, consumed); | |
563 | |||
564 | /* see commit 3566042a0 */ | ||
565 |
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|
297160 | if (bytestream2_get_bytes_left(&bc) >= 4 && |
566 | 115865 | bytestream2_peek_be32(&bc) == 0x000001E0) | |
567 | 4 | skip_trailing_zeros = 0; | |
568 | |||
569 |
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181295 | nal->size_bits = get_bit_length(nal, 1 + (codec_id == AV_CODEC_ID_HEVC), |
570 | skip_trailing_zeros); | ||
571 | |||
572 |
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181295 | if (nal->size <= 0 || nal->size_bits <= 0) |
573 | ✗ | continue; | |
574 | |||
575 | 181295 | ret = init_get_bits(&nal->gb, nal->data, nal->size_bits); | |
576 |
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181295 | if (ret < 0) |
577 | ✗ | return ret; | |
578 | |||
579 | /* Reset type in case it contains a stale value from a previously parsed NAL */ | ||
580 | 181295 | nal->type = 0; | |
581 | |||
582 |
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181295 | if (codec_id == AV_CODEC_ID_VVC) |
583 | 18329 | ret = vvc_parse_nal_header(nal, logctx); | |
584 |
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|
162966 | else if (codec_id == AV_CODEC_ID_HEVC) { |
585 | 99729 | ret = hevc_parse_nal_header(nal, logctx); | |
586 |
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|
99729 | if (nal->nuh_layer_id == 63) |
587 | ✗ | continue; | |
588 | } else | ||
589 | 63237 | ret = h264_parse_nal_header(nal, logctx); | |
590 |
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181295 | if (ret < 0) { |
591 | 2 | av_log(logctx, AV_LOG_WARNING, "Invalid NAL unit %d, skipping.\n", | |
592 | nal->type); | ||
593 | 2 | continue; | |
594 | } | ||
595 | |||
596 | 181293 | pkt->nb_nals++; | |
597 | } | ||
598 | |||
599 | 65432 | return 0; | |
600 | } | ||
601 | |||
602 | 3929 | void ff_h2645_packet_uninit(H2645Packet *pkt) | |
603 | { | ||
604 | int i; | ||
605 |
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17826 | for (i = 0; i < pkt->nals_allocated; i++) { |
606 | 13897 | av_freep(&pkt->nals[i].skipped_bytes_pos); | |
607 | } | ||
608 | 3929 | av_freep(&pkt->nals); | |
609 | 3929 | pkt->nals_allocated = pkt->nal_buffer_size = 0; | |
610 |
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3929 | if (pkt->rbsp.rbsp_buffer_ref) { |
611 | 211 | av_buffer_unref(&pkt->rbsp.rbsp_buffer_ref); | |
612 | 211 | pkt->rbsp.rbsp_buffer = NULL; | |
613 | } else | ||
614 | 3718 | av_freep(&pkt->rbsp.rbsp_buffer); | |
615 | 3929 | pkt->rbsp.rbsp_buffer_alloc_size = pkt->rbsp.rbsp_buffer_size = 0; | |
616 | 3929 | } | |
617 |