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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 "hevc.h" | ||
31 | #include "h264.h" | ||
32 | #include "h2645_parse.h" | ||
33 | #include "vvc.h" | ||
34 | |||
35 | 221324 | int ff_h2645_extract_rbsp(const uint8_t *src, int length, | |
36 | H2645RBSP *rbsp, H2645NAL *nal, int small_padding) | ||
37 | { | ||
38 | int i, si, di; | ||
39 | uint8_t *dst; | ||
40 | |||
41 | 221324 | nal->skipped_bytes = 0; | |
42 | #define STARTCODE_TEST \ | ||
43 | if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) { \ | ||
44 | if (src[i + 2] != 3 && src[i + 2] != 0) { \ | ||
45 | /* startcode, so we must be past the end */ \ | ||
46 | length = i; \ | ||
47 | } \ | ||
48 | break; \ | ||
49 | } | ||
50 | #if HAVE_FAST_UNALIGNED | ||
51 | #define FIND_FIRST_ZERO \ | ||
52 | if (i > 0 && !src[i]) \ | ||
53 | i--; \ | ||
54 | while (src[i]) \ | ||
55 | i++ | ||
56 | #if HAVE_FAST_64BIT | ||
57 |
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49292439 | for (i = 0; i + 1 < length; i += 9) { |
58 | 96959174 | if (!((~AV_RN64(src + i) & | |
59 |
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49192419 | (AV_RN64(src + i) - 0x0100010001000101ULL)) & |
60 | 0x8000800080008080ULL)) | ||
61 | 47766755 | continue; | |
62 |
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6007779 | FIND_FIRST_ZERO; |
63 |
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1425664 | STARTCODE_TEST; |
64 | 1304360 | i -= 7; | |
65 | } | ||
66 | #else | ||
67 | for (i = 0; i + 1 < length; i += 5) { | ||
68 | if (!((~AV_RN32(src + i) & | ||
69 | (AV_RN32(src + i) - 0x01000101U)) & | ||
70 | 0x80008080U)) | ||
71 | continue; | ||
72 | FIND_FIRST_ZERO; | ||
73 | STARTCODE_TEST; | ||
74 | i -= 3; | ||
75 | } | ||
76 | #endif /* HAVE_FAST_64BIT */ | ||
77 | #else | ||
78 | for (i = 0; i + 1 < length; i += 2) { | ||
79 | if (src[i]) | ||
80 | continue; | ||
81 | if (i > 0 && src[i - 1] == 0) | ||
82 | i--; | ||
83 | STARTCODE_TEST; | ||
84 | } | ||
85 | #endif /* HAVE_FAST_UNALIGNED */ | ||
86 | |||
87 |
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221324 | if (i >= length - 1 && small_padding) { // no escaped 0 |
88 | 136401 | nal->data = | |
89 | 136401 | nal->raw_data = src; | |
90 | 136401 | nal->size = | |
91 | 136401 | nal->raw_size = length; | |
92 | 136401 | return length; | |
93 |
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84923 | } else if (i > length) |
94 | 23976 | i = length; | |
95 | |||
96 | 84923 | dst = &rbsp->rbsp_buffer[rbsp->rbsp_buffer_size]; | |
97 | |||
98 | 84923 | memcpy(dst, src, i); | |
99 | 84923 | si = di = i; | |
100 |
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9929637 | while (si + 2 < length) { |
101 | // remove escapes (very rare 1:2^22) | ||
102 |
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9893058 | if (src[si + 2] > 3) { |
103 | 9519628 | dst[di++] = src[si++]; | |
104 | 9519628 | dst[di++] = src[si++]; | |
105 |
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373430 | } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) { |
106 |
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73916 | if (src[si + 2] == 3) { // escape |
107 | 25572 | dst[di++] = 0; | |
108 | 25572 | dst[di++] = 0; | |
109 | 25572 | si += 3; | |
110 | |||
111 |
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25572 | if (nal->skipped_bytes_pos) { |
112 | 21458 | nal->skipped_bytes++; | |
113 |
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21458 | if (nal->skipped_bytes_pos_size < nal->skipped_bytes) { |
114 | 21 | nal->skipped_bytes_pos_size *= 2; | |
115 |
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21 | av_assert0(nal->skipped_bytes_pos_size >= nal->skipped_bytes); |
116 | 21 | av_reallocp_array(&nal->skipped_bytes_pos, | |
117 | 21 | nal->skipped_bytes_pos_size, | |
118 | sizeof(*nal->skipped_bytes_pos)); | ||
119 |
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21 | if (!nal->skipped_bytes_pos) { |
120 | ✗ | nal->skipped_bytes_pos_size = 0; | |
121 | ✗ | return AVERROR(ENOMEM); | |
122 | } | ||
123 | } | ||
124 |
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21458 | if (nal->skipped_bytes_pos) |
125 | 21458 | nal->skipped_bytes_pos[nal->skipped_bytes-1] = di - 1; | |
126 | } | ||
127 | 25572 | continue; | |
128 | } else // next start code | ||
129 | 48344 | goto nsc; | |
130 | } | ||
131 | |||
132 | 9819142 | dst[di++] = src[si++]; | |
133 | } | ||
134 |
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42287 | while (si < length) |
135 | 5708 | dst[di++] = src[si++]; | |
136 | |||
137 | 36579 | nsc: | |
138 | 84923 | memset(dst + di, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
139 | |||
140 | 84923 | nal->data = dst; | |
141 | 84923 | nal->size = di; | |
142 | 84923 | nal->raw_data = src; | |
143 | 84923 | nal->raw_size = si; | |
144 | 84923 | rbsp->rbsp_buffer_size += si; | |
145 | |||
146 | 84923 | return si; | |
147 | } | ||
148 | |||
149 | static const char *const vvc_nal_type_name[32] = { | ||
150 | "TRAIL_NUT", // VVC_TRAIL_NUT | ||
151 | "STSA_NUT", // VVC_STSA_NUT | ||
152 | "RADL_NUT", // VVC_RADL_NUT | ||
153 | "RASL_NUT", // VVC_RASL_NUT | ||
154 | "RSV_VCL4", // VVC_RSV_VCL_4 | ||
155 | "RSV_VCL5", // VVC_RSV_VCL_5 | ||
156 | "RSV_VCL6", // VVC_RSV_VCL_6 | ||
157 | "IDR_W_RADL", // VVC_IDR_W_RADL | ||
158 | "IDR_N_LP", // VVC_IDR_N_LP | ||
159 | "CRA_NUT", // VVC_CRA_NUT | ||
160 | "GDR_NUT", // VVC_GDR_NUT | ||
161 | "RSV_IRAP_11", // VVC_RSV_IRAP_11 | ||
162 | "OPI_NUT", // VVC_OPI_NUT | ||
163 | "DCI_NUT", // VVC_DCI_NUT | ||
164 | "VPS_NUT", // VVC_VPS_NUT | ||
165 | "SPS_NUT", // VVC_SPS_NUT | ||
166 | "PPS_NUT", // VVC_PPS_NUT | ||
167 | "APS_PREFIX", // VVC_PREFIX_APS_NUT | ||
168 | "APS_SUFFIX", // VVC_SUFFIX_APS_NUT | ||
169 | "PH_NUT", // VVC_PH_NUT | ||
170 | "AUD_NUT", // VVC_AUD_NUT | ||
171 | "EOS_NUT", // VVC_EOS_NUT | ||
172 | "EOB_NUT", // VVC_EOB_NUT | ||
173 | "SEI_PREFIX", // VVC_PREFIX_SEI_NUT | ||
174 | "SEI_SUFFIX", // VVC_SUFFIX_SEI_NUT | ||
175 | "FD_NUT", // VVC_FD_NUT | ||
176 | "RSV_NVCL26", // VVC_RSV_NVCL_26 | ||
177 | "RSV_NVCL27", // VVC_RSV_NVCL_27 | ||
178 | "UNSPEC28", // VVC_UNSPEC_28 | ||
179 | "UNSPEC29", // VVC_UNSPEC_29 | ||
180 | "UNSPEC30", // VVC_UNSPEC_30 | ||
181 | "UNSPEC31", // VVC_UNSPEC_31 | ||
182 | }; | ||
183 | |||
184 | 11727 | static const char *vvc_nal_unit_name(int nal_type) | |
185 | { | ||
186 |
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11727 | av_assert0(nal_type >= 0 && nal_type < 32); |
187 | 11727 | return vvc_nal_type_name[nal_type]; | |
188 | } | ||
189 | |||
190 | static const char *const hevc_nal_type_name[64] = { | ||
191 | "TRAIL_N", // HEVC_NAL_TRAIL_N | ||
192 | "TRAIL_R", // HEVC_NAL_TRAIL_R | ||
193 | "TSA_N", // HEVC_NAL_TSA_N | ||
194 | "TSA_R", // HEVC_NAL_TSA_R | ||
195 | "STSA_N", // HEVC_NAL_STSA_N | ||
196 | "STSA_R", // HEVC_NAL_STSA_R | ||
197 | "RADL_N", // HEVC_NAL_RADL_N | ||
198 | "RADL_R", // HEVC_NAL_RADL_R | ||
199 | "RASL_N", // HEVC_NAL_RASL_N | ||
200 | "RASL_R", // HEVC_NAL_RASL_R | ||
201 | "RSV_VCL_N10", // HEVC_NAL_VCL_N10 | ||
202 | "RSV_VCL_R11", // HEVC_NAL_VCL_R11 | ||
203 | "RSV_VCL_N12", // HEVC_NAL_VCL_N12 | ||
204 | "RSV_VLC_R13", // HEVC_NAL_VCL_R13 | ||
205 | "RSV_VCL_N14", // HEVC_NAL_VCL_N14 | ||
206 | "RSV_VCL_R15", // HEVC_NAL_VCL_R15 | ||
207 | "BLA_W_LP", // HEVC_NAL_BLA_W_LP | ||
208 | "BLA_W_RADL", // HEVC_NAL_BLA_W_RADL | ||
209 | "BLA_N_LP", // HEVC_NAL_BLA_N_LP | ||
210 | "IDR_W_RADL", // HEVC_NAL_IDR_W_RADL | ||
211 | "IDR_N_LP", // HEVC_NAL_IDR_N_LP | ||
212 | "CRA_NUT", // HEVC_NAL_CRA_NUT | ||
213 | "RSV_IRAP_VCL22", // HEVC_NAL_RSV_IRAP_VCL22 | ||
214 | "RSV_IRAP_VCL23", // HEVC_NAL_RSV_IRAP_VCL23 | ||
215 | "RSV_VCL24", // HEVC_NAL_RSV_VCL24 | ||
216 | "RSV_VCL25", // HEVC_NAL_RSV_VCL25 | ||
217 | "RSV_VCL26", // HEVC_NAL_RSV_VCL26 | ||
218 | "RSV_VCL27", // HEVC_NAL_RSV_VCL27 | ||
219 | "RSV_VCL28", // HEVC_NAL_RSV_VCL28 | ||
220 | "RSV_VCL29", // HEVC_NAL_RSV_VCL29 | ||
221 | "RSV_VCL30", // HEVC_NAL_RSV_VCL30 | ||
222 | "RSV_VCL31", // HEVC_NAL_RSV_VCL31 | ||
223 | "VPS", // HEVC_NAL_VPS | ||
224 | "SPS", // HEVC_NAL_SPS | ||
225 | "PPS", // HEVC_NAL_PPS | ||
226 | "AUD", // HEVC_NAL_AUD | ||
227 | "EOS_NUT", // HEVC_NAL_EOS_NUT | ||
228 | "EOB_NUT", // HEVC_NAL_EOB_NUT | ||
229 | "FD_NUT", // HEVC_NAL_FD_NUT | ||
230 | "SEI_PREFIX", // HEVC_NAL_SEI_PREFIX | ||
231 | "SEI_SUFFIX", // HEVC_NAL_SEI_SUFFIX | ||
232 | "RSV_NVCL41", // HEVC_NAL_RSV_NVCL41 | ||
233 | "RSV_NVCL42", // HEVC_NAL_RSV_NVCL42 | ||
234 | "RSV_NVCL43", // HEVC_NAL_RSV_NVCL43 | ||
235 | "RSV_NVCL44", // HEVC_NAL_RSV_NVCL44 | ||
236 | "RSV_NVCL45", // HEVC_NAL_RSV_NVCL45 | ||
237 | "RSV_NVCL46", // HEVC_NAL_RSV_NVCL46 | ||
238 | "RSV_NVCL47", // HEVC_NAL_RSV_NVCL47 | ||
239 | "UNSPEC48", // HEVC_NAL_UNSPEC48 | ||
240 | "UNSPEC49", // HEVC_NAL_UNSPEC49 | ||
241 | "UNSPEC50", // HEVC_NAL_UNSPEC50 | ||
242 | "UNSPEC51", // HEVC_NAL_UNSPEC51 | ||
243 | "UNSPEC52", // HEVC_NAL_UNSPEC52 | ||
244 | "UNSPEC53", // HEVC_NAL_UNSPEC53 | ||
245 | "UNSPEC54", // HEVC_NAL_UNSPEC54 | ||
246 | "UNSPEC55", // HEVC_NAL_UNSPEC55 | ||
247 | "UNSPEC56", // HEVC_NAL_UNSPEC56 | ||
248 | "UNSPEC57", // HEVC_NAL_UNSPEC57 | ||
249 | "UNSPEC58", // HEVC_NAL_UNSPEC58 | ||
250 | "UNSPEC59", // HEVC_NAL_UNSPEC59 | ||
251 | "UNSPEC60", // HEVC_NAL_UNSPEC60 | ||
252 | "UNSPEC61", // HEVC_NAL_UNSPEC61 | ||
253 | "UNSPEC62", // HEVC_NAL_UNSPEC62 | ||
254 | "UNSPEC63", // HEVC_NAL_UNSPEC63 | ||
255 | }; | ||
256 | |||
257 | 97015 | static const char *hevc_nal_unit_name(int nal_type) | |
258 | { | ||
259 |
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97015 | av_assert0(nal_type >= 0 && nal_type < 64); |
260 | 97015 | return hevc_nal_type_name[nal_type]; | |
261 | } | ||
262 | |||
263 | static const char *const h264_nal_type_name[32] = { | ||
264 | "Unspecified 0", //H264_NAL_UNSPECIFIED | ||
265 | "Coded slice of a non-IDR picture", // H264_NAL_SLICE | ||
266 | "Coded slice data partition A", // H264_NAL_DPA | ||
267 | "Coded slice data partition B", // H264_NAL_DPB | ||
268 | "Coded slice data partition C", // H264_NAL_DPC | ||
269 | "IDR", // H264_NAL_IDR_SLICE | ||
270 | "SEI", // H264_NAL_SEI | ||
271 | "SPS", // H264_NAL_SPS | ||
272 | "PPS", // H264_NAL_PPS | ||
273 | "AUD", // H264_NAL_AUD | ||
274 | "End of sequence", // H264_NAL_END_SEQUENCE | ||
275 | "End of stream", // H264_NAL_END_STREAM | ||
276 | "Filler data", // H264_NAL_FILLER_DATA | ||
277 | "SPS extension", // H264_NAL_SPS_EXT | ||
278 | "Prefix", // H264_NAL_PREFIX | ||
279 | "Subset SPS", // H264_NAL_SUB_SPS | ||
280 | "Depth parameter set", // H264_NAL_DPS | ||
281 | "Reserved 17", // H264_NAL_RESERVED17 | ||
282 | "Reserved 18", // H264_NAL_RESERVED18 | ||
283 | "Auxiliary coded picture without partitioning", // H264_NAL_AUXILIARY_SLICE | ||
284 | "Slice extension", // H264_NAL_EXTEN_SLICE | ||
285 | "Slice extension for a depth view or a 3D-AVC texture view", // H264_NAL_DEPTH_EXTEN_SLICE | ||
286 | "Reserved 22", // H264_NAL_RESERVED22 | ||
287 | "Reserved 23", // H264_NAL_RESERVED23 | ||
288 | "Unspecified 24", // H264_NAL_UNSPECIFIED24 | ||
289 | "Unspecified 25", // H264_NAL_UNSPECIFIED25 | ||
290 | "Unspecified 26", // H264_NAL_UNSPECIFIED26 | ||
291 | "Unspecified 27", // H264_NAL_UNSPECIFIED27 | ||
292 | "Unspecified 28", // H264_NAL_UNSPECIFIED28 | ||
293 | "Unspecified 29", // H264_NAL_UNSPECIFIED29 | ||
294 | "Unspecified 30", // H264_NAL_UNSPECIFIED30 | ||
295 | "Unspecified 31", // H264_NAL_UNSPECIFIED31 | ||
296 | }; | ||
297 | |||
298 | 63088 | static const char *h264_nal_unit_name(int nal_type) | |
299 | { | ||
300 |
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63088 | av_assert0(nal_type >= 0 && nal_type < 32); |
301 | 63088 | return h264_nal_type_name[nal_type]; | |
302 | } | ||
303 | |||
304 | 171832 | static int get_bit_length(H2645NAL *nal, int min_size, int skip_trailing_zeros) | |
305 | { | ||
306 | 171832 | int size = nal->size; | |
307 | 171832 | int trailing_padding = 0; | |
308 | |||
309 |
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239233 | while (skip_trailing_zeros && size > 0 && nal->data[size - 1] == 0) |
310 | 67401 | size--; | |
311 | |||
312 |
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171832 | if (!size) |
313 | ✗ | return 0; | |
314 | |||
315 |
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171832 | if (size <= min_size) { |
316 |
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63 | if (nal->size < min_size) |
317 | ✗ | return AVERROR_INVALIDDATA; | |
318 | 63 | size = min_size; | |
319 | } else { | ||
320 | 171769 | int v = nal->data[size - 1]; | |
321 | /* remove the stop bit and following trailing zeros, | ||
322 | * or nothing for damaged bitstreams */ | ||
323 |
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171769 | if (v) |
324 | 171769 | trailing_padding = ff_ctz(v) + 1; | |
325 | } | ||
326 | |||
327 |
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171832 | if (size > INT_MAX / 8) |
328 | ✗ | return AVERROR(ERANGE); | |
329 | 171832 | size *= 8; | |
330 | |||
331 | 171832 | return size - trailing_padding; | |
332 | } | ||
333 | |||
334 | /** | ||
335 | * @return AVERROR_INVALIDDATA if the packet is not a valid NAL unit, | ||
336 | * 0 otherwise | ||
337 | */ | ||
338 | 11727 | static int vvc_parse_nal_header(H2645NAL *nal, void *logctx) | |
339 | { | ||
340 | 11727 | GetBitContext *gb = &nal->gb; | |
341 | |||
342 |
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11727 | if (get_bits1(gb) != 0) //forbidden_zero_bit |
343 | ✗ | return AVERROR_INVALIDDATA; | |
344 | |||
345 | 11727 | skip_bits1(gb); //nuh_reserved_zero_bit | |
346 | |||
347 | 11727 | nal->nuh_layer_id = get_bits(gb, 6); | |
348 | 11727 | nal->type = get_bits(gb, 5); | |
349 | 11727 | nal->temporal_id = get_bits(gb, 3) - 1; | |
350 |
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11727 | if (nal->temporal_id < 0) |
351 | ✗ | return AVERROR_INVALIDDATA; | |
352 | |||
353 |
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11727 | if ((nal->type >= VVC_IDR_W_RADL && nal->type <= VVC_RSV_IRAP_11) && nal->temporal_id) |
354 | ✗ | return AVERROR_INVALIDDATA; | |
355 | |||
356 | 11727 | av_log(logctx, AV_LOG_DEBUG, | |
357 | "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | ||
358 | nal->type, vvc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | ||
359 | |||
360 | 11727 | return 0; | |
361 | } | ||
362 | |||
363 | 97017 | static int hevc_parse_nal_header(H2645NAL *nal, void *logctx) | |
364 | { | ||
365 | 97017 | GetBitContext *gb = &nal->gb; | |
366 | |||
367 |
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97017 | if (get_bits1(gb) != 0) |
368 | 2 | return AVERROR_INVALIDDATA; | |
369 | |||
370 | 97015 | nal->type = get_bits(gb, 6); | |
371 | |||
372 | 97015 | nal->nuh_layer_id = get_bits(gb, 6); | |
373 | 97015 | nal->temporal_id = get_bits(gb, 3) - 1; | |
374 |
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97015 | if (nal->temporal_id < 0) |
375 | ✗ | return AVERROR_INVALIDDATA; | |
376 | |||
377 | 97015 | av_log(logctx, AV_LOG_DEBUG, | |
378 | "nal_unit_type: %d(%s), nuh_layer_id: %d, temporal_id: %d\n", | ||
379 | nal->type, hevc_nal_unit_name(nal->type), nal->nuh_layer_id, nal->temporal_id); | ||
380 | |||
381 | 97015 | return 0; | |
382 | } | ||
383 | |||
384 | 63088 | static int h264_parse_nal_header(H2645NAL *nal, void *logctx) | |
385 | { | ||
386 | 63088 | GetBitContext *gb = &nal->gb; | |
387 | |||
388 |
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63088 | if (get_bits1(gb) != 0) |
389 | ✗ | return AVERROR_INVALIDDATA; | |
390 | |||
391 | 63088 | nal->ref_idc = get_bits(gb, 2); | |
392 | 63088 | nal->type = get_bits(gb, 5); | |
393 | |||
394 | 63088 | av_log(logctx, AV_LOG_DEBUG, | |
395 | "nal_unit_type: %d(%s), nal_ref_idc: %d\n", | ||
396 | nal->type, h264_nal_unit_name(nal->type), nal->ref_idc); | ||
397 | |||
398 | 63088 | return 0; | |
399 | } | ||
400 | |||
401 | 162885 | static int find_next_start_code(const uint8_t *buf, const uint8_t *next_avc) | |
402 | { | ||
403 | 162885 | int i = 0; | |
404 | |||
405 |
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162885 | if (buf + 3 >= next_avc) |
406 | ✗ | return next_avc - buf; | |
407 | |||
408 |
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195447 | while (buf + i + 3 < next_avc) { |
409 |
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195447 | if (buf[i] == 0 && buf[i + 1] == 0 && buf[i + 2] == 1) |
410 | 162885 | break; | |
411 | 32562 | i++; | |
412 | } | ||
413 | 162885 | return i + 3; | |
414 | } | ||
415 | |||
416 | 62392 | static void alloc_rbsp_buffer(H2645RBSP *rbsp, unsigned int size, int use_ref) | |
417 | { | ||
418 | 62392 | int min_size = size; | |
419 | |||
420 |
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62392 | if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) |
421 | ✗ | goto fail; | |
422 | 62392 | size += AV_INPUT_BUFFER_PADDING_SIZE; | |
423 | |||
424 |
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62392 | if (rbsp->rbsp_buffer_alloc_size >= size && |
425 |
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58414 | (!rbsp->rbsp_buffer_ref || av_buffer_is_writable(rbsp->rbsp_buffer_ref))) { |
426 |
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57957 | av_assert0(rbsp->rbsp_buffer); |
427 | 57957 | memset(rbsp->rbsp_buffer + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
428 | 57957 | return; | |
429 | } | ||
430 | |||
431 |
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4435 | size = FFMIN(size + size / 16 + 32, INT_MAX); |
432 | |||
433 |
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4435 | if (rbsp->rbsp_buffer_ref) |
434 | 1270 | av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
435 | else | ||
436 | 3165 | av_free(rbsp->rbsp_buffer); | |
437 | |||
438 | 4435 | rbsp->rbsp_buffer = av_mallocz(size); | |
439 |
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4435 | if (!rbsp->rbsp_buffer) |
440 | ✗ | goto fail; | |
441 | 4435 | rbsp->rbsp_buffer_alloc_size = size; | |
442 | |||
443 |
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4435 | if (use_ref) { |
444 | 1370 | rbsp->rbsp_buffer_ref = av_buffer_create(rbsp->rbsp_buffer, size, | |
445 | NULL, NULL, 0); | ||
446 |
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1370 | if (!rbsp->rbsp_buffer_ref) |
447 | ✗ | goto fail; | |
448 | } | ||
449 | |||
450 | 4435 | return; | |
451 | |||
452 | ✗ | fail: | |
453 | ✗ | rbsp->rbsp_buffer_alloc_size = 0; | |
454 | ✗ | if (rbsp->rbsp_buffer_ref) { | |
455 | ✗ | av_buffer_unref(&rbsp->rbsp_buffer_ref); | |
456 | ✗ | rbsp->rbsp_buffer = NULL; | |
457 | } else | ||
458 | ✗ | av_freep(&rbsp->rbsp_buffer); | |
459 | |||
460 | ✗ | return; | |
461 | } | ||
462 | |||
463 | 62392 | int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, | |
464 | void *logctx, int is_nalff, int nal_length_size, | ||
465 | enum AVCodecID codec_id, int small_padding, int use_ref) | ||
466 | { | ||
467 | GetByteContext bc; | ||
468 | 62392 | int consumed, ret = 0; | |
469 |
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62392 | int next_avc = is_nalff ? 0 : length; |
470 |
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62392 | int64_t padding = small_padding ? 0 : MAX_MBPAIR_SIZE; |
471 | |||
472 | 62392 | bytestream2_init(&bc, buf, length); | |
473 | 62392 | alloc_rbsp_buffer(&pkt->rbsp, length + padding, use_ref); | |
474 | |||
475 |
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62392 | if (!pkt->rbsp.rbsp_buffer) |
476 | ✗ | return AVERROR(ENOMEM); | |
477 | |||
478 | 62392 | pkt->rbsp.rbsp_buffer_size = 0; | |
479 | 62392 | pkt->nb_nals = 0; | |
480 |
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234224 | while (bytestream2_get_bytes_left(&bc) >= 4) { |
481 | H2645NAL *nal; | ||
482 | 171833 | int extract_length = 0; | |
483 | 171833 | int skip_trailing_zeros = 1; | |
484 | |||
485 |
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171833 | if (bytestream2_tell(&bc) == next_avc) { |
486 | 8948 | int i = 0; | |
487 | 8948 | extract_length = get_nalsize(nal_length_size, | |
488 | bc.buffer, bytestream2_get_bytes_left(&bc), &i, logctx); | ||
489 |
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8948 | if (extract_length < 0) |
490 | 1 | return extract_length; | |
491 | |||
492 | 8947 | bytestream2_skip(&bc, nal_length_size); | |
493 | |||
494 | 8947 | next_avc = bytestream2_tell(&bc) + extract_length; | |
495 | } else { | ||
496 | int buf_index; | ||
497 | |||
498 |
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162885 | if (bytestream2_tell(&bc) > next_avc) |
499 | ✗ | av_log(logctx, AV_LOG_WARNING, "Exceeded next NALFF position, re-syncing.\n"); | |
500 | |||
501 | /* search start code */ | ||
502 | 162885 | buf_index = find_next_start_code(bc.buffer, buf + next_avc); | |
503 | |||
504 | 162885 | bytestream2_skip(&bc, buf_index); | |
505 | |||
506 |
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|
162885 | if (!bytestream2_get_bytes_left(&bc)) { |
507 | ✗ | if (pkt->nb_nals > 0) { | |
508 | // No more start codes: we discarded some irrelevant | ||
509 | // bytes at the end of the packet. | ||
510 | ✗ | return 0; | |
511 | } else { | ||
512 | ✗ | av_log(logctx, AV_LOG_ERROR, "No start code is found.\n"); | |
513 | ✗ | return AVERROR_INVALIDDATA; | |
514 | } | ||
515 | } | ||
516 | |||
517 |
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|
162885 | extract_length = FFMIN(bytestream2_get_bytes_left(&bc), next_avc - bytestream2_tell(&bc)); |
518 | |||
519 |
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162885 | if (bytestream2_tell(&bc) >= next_avc) { |
520 | /* skip to the start of the next NAL */ | ||
521 | ✗ | bytestream2_skip(&bc, next_avc - bytestream2_tell(&bc)); | |
522 | ✗ | continue; | |
523 | } | ||
524 | } | ||
525 | |||
526 |
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171832 | if (pkt->nals_allocated < pkt->nb_nals + 1) { |
527 | 12354 | int new_size = pkt->nals_allocated + 1; | |
528 | void *tmp; | ||
529 | |||
530 |
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12354 | if (new_size >= INT_MAX / sizeof(*pkt->nals)) |
531 | ✗ | return AVERROR(ENOMEM); | |
532 | |||
533 | 12354 | tmp = av_fast_realloc(pkt->nals, &pkt->nal_buffer_size, new_size * sizeof(*pkt->nals)); | |
534 |
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12354 | if (!tmp) |
535 | ✗ | return AVERROR(ENOMEM); | |
536 | |||
537 | 12354 | pkt->nals = tmp; | |
538 | 12354 | memset(pkt->nals + pkt->nals_allocated, 0, sizeof(*pkt->nals)); | |
539 | |||
540 | 12354 | nal = &pkt->nals[pkt->nb_nals]; | |
541 |
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12354 | nal->skipped_bytes_pos_size = FFMIN(1024, extract_length/3+1); // initial buffer size |
542 | 12354 | nal->skipped_bytes_pos = av_malloc_array(nal->skipped_bytes_pos_size, sizeof(*nal->skipped_bytes_pos)); | |
543 |
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12354 | if (!nal->skipped_bytes_pos) |
544 | ✗ | return AVERROR(ENOMEM); | |
545 | |||
546 | 12354 | pkt->nals_allocated = new_size; | |
547 | } | ||
548 | 171832 | nal = &pkt->nals[pkt->nb_nals]; | |
549 | |||
550 | 171832 | consumed = ff_h2645_extract_rbsp(bc.buffer, extract_length, &pkt->rbsp, nal, small_padding); | |
551 |
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171832 | if (consumed < 0) |
552 | ✗ | return consumed; | |
553 | |||
554 |
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171832 | if (is_nalff && (extract_length != consumed) && extract_length) |
555 | 12 | av_log(logctx, AV_LOG_DEBUG, | |
556 | "NALFF: Consumed only %d bytes instead of %d\n", | ||
557 | consumed, extract_length); | ||
558 | |||
559 | 171832 | bytestream2_skip(&bc, consumed); | |
560 | |||
561 | /* see commit 3566042a0 */ | ||
562 |
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281275 | if (bytestream2_get_bytes_left(&bc) >= 4 && |
563 | 109443 | bytestream2_peek_be32(&bc) == 0x000001E0) | |
564 | 4 | skip_trailing_zeros = 0; | |
565 | |||
566 |
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171832 | nal->size_bits = get_bit_length(nal, 1 + (codec_id == AV_CODEC_ID_HEVC), |
567 | skip_trailing_zeros); | ||
568 | |||
569 |
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171832 | if (nal->size <= 0 || nal->size_bits <= 0) |
570 | ✗ | continue; | |
571 | |||
572 | 171832 | ret = init_get_bits(&nal->gb, nal->data, nal->size_bits); | |
573 |
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171832 | if (ret < 0) |
574 | ✗ | return ret; | |
575 | |||
576 | /* Reset type in case it contains a stale value from a previously parsed NAL */ | ||
577 | 171832 | nal->type = 0; | |
578 | |||
579 |
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171832 | if (codec_id == AV_CODEC_ID_VVC) |
580 | 11727 | ret = vvc_parse_nal_header(nal, logctx); | |
581 |
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160105 | else if (codec_id == AV_CODEC_ID_HEVC) |
582 | 97017 | ret = hevc_parse_nal_header(nal, logctx); | |
583 | else | ||
584 | 63088 | ret = h264_parse_nal_header(nal, logctx); | |
585 |
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171832 | if (ret < 0) { |
586 | 2 | av_log(logctx, AV_LOG_WARNING, "Invalid NAL unit %d, skipping.\n", | |
587 | nal->type); | ||
588 | 2 | continue; | |
589 | } | ||
590 | |||
591 | 171830 | pkt->nb_nals++; | |
592 | } | ||
593 | |||
594 | 62391 | return 0; | |
595 | } | ||
596 | |||
597 | 3483 | void ff_h2645_packet_uninit(H2645Packet *pkt) | |
598 | { | ||
599 | int i; | ||
600 |
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15837 | for (i = 0; i < pkt->nals_allocated; i++) { |
601 | 12354 | av_freep(&pkt->nals[i].skipped_bytes_pos); | |
602 | } | ||
603 | 3483 | av_freep(&pkt->nals); | |
604 | 3483 | pkt->nals_allocated = pkt->nal_buffer_size = 0; | |
605 |
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3483 | if (pkt->rbsp.rbsp_buffer_ref) { |
606 | 100 | av_buffer_unref(&pkt->rbsp.rbsp_buffer_ref); | |
607 | 100 | pkt->rbsp.rbsp_buffer = NULL; | |
608 | } else | ||
609 | 3383 | av_freep(&pkt->rbsp.rbsp_buffer); | |
610 | 3483 | pkt->rbsp.rbsp_buffer_alloc_size = pkt->rbsp.rbsp_buffer_size = 0; | |
611 | 3483 | } | |
612 |