1 | /* The copyright in this software is being made available under the BSD |
---|
2 | * License, included below. This software may be subject to other third party |
---|
3 | * and contributor rights, including patent rights, and no such rights are |
---|
4 | * granted under this license. |
---|
5 | * |
---|
6 | * Copyright (c) 2010-2014, ITU/ISO/IEC |
---|
7 | * All rights reserved. |
---|
8 | * |
---|
9 | * Redistribution and use in source and binary forms, with or without |
---|
10 | * modification, are permitted provided that the following conditions are met: |
---|
11 | * |
---|
12 | * * Redistributions of source code must retain the above copyright notice, |
---|
13 | * this list of conditions and the following disclaimer. |
---|
14 | * * Redistributions in binary form must reproduce the above copyright notice, |
---|
15 | * this list of conditions and the following disclaimer in the documentation |
---|
16 | * and/or other materials provided with the distribution. |
---|
17 | * * Neither the name of the ITU/ISO/IEC nor the names of its contributors may |
---|
18 | * be used to endorse or promote products derived from this software without |
---|
19 | * specific prior written permission. |
---|
20 | * |
---|
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
---|
22 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS |
---|
25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
---|
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
---|
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
---|
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
---|
29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
---|
30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
---|
31 | * THE POSSIBILITY OF SUCH DAMAGE. |
---|
32 | */ |
---|
33 | |
---|
34 | #include <stdlib.h> |
---|
35 | #include <stdio.h> |
---|
36 | |
---|
37 | |
---|
38 | enum NalUnitType |
---|
39 | { |
---|
40 | NAL_UNIT_CODED_SLICE_TRAIL_N = 0, // 0 |
---|
41 | NAL_UNIT_CODED_SLICE_TRAIL_R, // 1 |
---|
42 | |
---|
43 | NAL_UNIT_CODED_SLICE_TSA_N, // 2 |
---|
44 | NAL_UNIT_CODED_SLICE_TSA_R, // 3 |
---|
45 | |
---|
46 | NAL_UNIT_CODED_SLICE_STSA_N, // 4 |
---|
47 | NAL_UNIT_CODED_SLICE_STSA_R, // 5 |
---|
48 | |
---|
49 | NAL_UNIT_CODED_SLICE_RADL_N, // 6 |
---|
50 | NAL_UNIT_CODED_SLICE_RADL_R, // 7 |
---|
51 | |
---|
52 | NAL_UNIT_CODED_SLICE_RASL_N, // 8 |
---|
53 | NAL_UNIT_CODED_SLICE_RASL_R, // 9 |
---|
54 | |
---|
55 | NAL_UNIT_RESERVED_VCL_N10, |
---|
56 | NAL_UNIT_RESERVED_VCL_R11, |
---|
57 | NAL_UNIT_RESERVED_VCL_N12, |
---|
58 | NAL_UNIT_RESERVED_VCL_R13, |
---|
59 | NAL_UNIT_RESERVED_VCL_N14, |
---|
60 | NAL_UNIT_RESERVED_VCL_R15, |
---|
61 | |
---|
62 | NAL_UNIT_CODED_SLICE_BLA_W_LP, // 16 |
---|
63 | NAL_UNIT_CODED_SLICE_BLA_W_RADL, // 17 |
---|
64 | NAL_UNIT_CODED_SLICE_BLA_N_LP, // 18 |
---|
65 | NAL_UNIT_CODED_SLICE_IDR_W_RADL, // 19 |
---|
66 | NAL_UNIT_CODED_SLICE_IDR_N_LP, // 20 |
---|
67 | NAL_UNIT_CODED_SLICE_CRA, // 21 |
---|
68 | NAL_UNIT_RESERVED_IRAP_VCL22, |
---|
69 | NAL_UNIT_RESERVED_IRAP_VCL23, |
---|
70 | |
---|
71 | NAL_UNIT_RESERVED_VCL24, |
---|
72 | NAL_UNIT_RESERVED_VCL25, |
---|
73 | NAL_UNIT_RESERVED_VCL26, |
---|
74 | NAL_UNIT_RESERVED_VCL27, |
---|
75 | NAL_UNIT_RESERVED_VCL28, |
---|
76 | NAL_UNIT_RESERVED_VCL29, |
---|
77 | NAL_UNIT_RESERVED_VCL30, |
---|
78 | NAL_UNIT_RESERVED_VCL31, |
---|
79 | |
---|
80 | NAL_UNIT_VPS, // 32 |
---|
81 | NAL_UNIT_SPS, // 33 |
---|
82 | NAL_UNIT_PPS, // 34 |
---|
83 | NAL_UNIT_ACCESS_UNIT_DELIMITER, // 35 |
---|
84 | NAL_UNIT_EOS, // 36 |
---|
85 | NAL_UNIT_EOB, // 37 |
---|
86 | NAL_UNIT_FILLER_DATA, // 38 |
---|
87 | NAL_UNIT_PREFIX_SEI, // 39 |
---|
88 | NAL_UNIT_SUFFIX_SEI, // 40 |
---|
89 | NAL_UNIT_RESERVED_NVCL41, |
---|
90 | NAL_UNIT_RESERVED_NVCL42, |
---|
91 | NAL_UNIT_RESERVED_NVCL43, |
---|
92 | NAL_UNIT_RESERVED_NVCL44, |
---|
93 | NAL_UNIT_RESERVED_NVCL45, |
---|
94 | NAL_UNIT_RESERVED_NVCL46, |
---|
95 | NAL_UNIT_RESERVED_NVCL47, |
---|
96 | NAL_UNIT_UNSPECIFIED_48, |
---|
97 | NAL_UNIT_UNSPECIFIED_49, |
---|
98 | NAL_UNIT_UNSPECIFIED_50, |
---|
99 | NAL_UNIT_UNSPECIFIED_51, |
---|
100 | NAL_UNIT_UNSPECIFIED_52, |
---|
101 | NAL_UNIT_UNSPECIFIED_53, |
---|
102 | NAL_UNIT_UNSPECIFIED_54, |
---|
103 | NAL_UNIT_UNSPECIFIED_55, |
---|
104 | NAL_UNIT_UNSPECIFIED_56, |
---|
105 | NAL_UNIT_UNSPECIFIED_57, |
---|
106 | NAL_UNIT_UNSPECIFIED_58, |
---|
107 | NAL_UNIT_UNSPECIFIED_59, |
---|
108 | NAL_UNIT_UNSPECIFIED_60, |
---|
109 | NAL_UNIT_UNSPECIFIED_61, |
---|
110 | NAL_UNIT_UNSPECIFIED_62, |
---|
111 | NAL_UNIT_UNSPECIFIED_63, |
---|
112 | NAL_UNIT_INVALID, |
---|
113 | }; |
---|
114 | |
---|
115 | typedef struct NalUnitHeader_s |
---|
116 | { |
---|
117 | int nalUnitType; |
---|
118 | int nuhLayerId; |
---|
119 | int nuhTemporalIdPlus1; |
---|
120 | } NalUnitHeader; |
---|
121 | |
---|
122 | |
---|
123 | int findStartCodePrefix(FILE *inFile, int *numStartCodeZeros) |
---|
124 | { |
---|
125 | int numZeros = 0; |
---|
126 | int currByte; |
---|
127 | |
---|
128 | while (1) |
---|
129 | { |
---|
130 | currByte = fgetc(inFile); |
---|
131 | if (currByte == EOF) |
---|
132 | { |
---|
133 | return 0; |
---|
134 | } |
---|
135 | |
---|
136 | if (currByte == 0x01 && numZeros > 1) |
---|
137 | { |
---|
138 | *numStartCodeZeros = numZeros; |
---|
139 | return 1; |
---|
140 | } |
---|
141 | else if (currByte == 0) |
---|
142 | { |
---|
143 | numZeros++; |
---|
144 | } |
---|
145 | else |
---|
146 | { |
---|
147 | numZeros = 0; |
---|
148 | } |
---|
149 | } |
---|
150 | } |
---|
151 | |
---|
152 | int parseNalUnitHeader(FILE *inFile, NalUnitHeader *nalu) |
---|
153 | { |
---|
154 | int byte0, byte1; |
---|
155 | |
---|
156 | byte0 = fgetc(inFile); |
---|
157 | byte1 = fgetc(inFile); |
---|
158 | |
---|
159 | if (byte0 == EOF || byte1 == EOF) |
---|
160 | { |
---|
161 | return 0; |
---|
162 | } |
---|
163 | |
---|
164 | nalu->nalUnitType = (byte0 >> 1) & 0x3f; |
---|
165 | nalu->nuhLayerId = (((byte0 << 8) | byte1) >> 3) & 0x3f; |
---|
166 | nalu->nuhTemporalIdPlus1 = byte1 & 0x07; |
---|
167 | |
---|
168 | return 1; |
---|
169 | } |
---|
170 | |
---|
171 | void writeStartCodePrefixAndNUH(FILE *outFile, int numStartCodeZeros, NalUnitHeader *nalu) |
---|
172 | { |
---|
173 | int byte0, byte1; |
---|
174 | int i; |
---|
175 | |
---|
176 | /* Start code prefix */ |
---|
177 | if (numStartCodeZeros > 3) |
---|
178 | { |
---|
179 | numStartCodeZeros = 3; |
---|
180 | } |
---|
181 | for (i = 0; i < numStartCodeZeros; i++) |
---|
182 | { |
---|
183 | fputc(0, outFile); |
---|
184 | } |
---|
185 | fputc(0x01, outFile); |
---|
186 | |
---|
187 | /* NAL unit header */ |
---|
188 | byte0 = ((nalu->nalUnitType << 6) | nalu->nuhLayerId) >> 5; |
---|
189 | byte1 = ((nalu->nuhLayerId << 3) | nalu->nuhTemporalIdPlus1) & 0xff; |
---|
190 | fputc(byte0, outFile); |
---|
191 | fputc(byte1, outFile); |
---|
192 | } |
---|
193 | |
---|
194 | int main(int argc, char **argv) |
---|
195 | { |
---|
196 | FILE *inFile; |
---|
197 | FILE *outFile; |
---|
198 | int assignedBaseLayerId; |
---|
199 | int tIdTarget = 6; |
---|
200 | NalUnitHeader nalu; |
---|
201 | int numStartCodeZeros; |
---|
202 | int nalIsSpsPpsEob; |
---|
203 | int removeNal; |
---|
204 | |
---|
205 | if (argc < 4 || argc > 5) |
---|
206 | { |
---|
207 | fprintf(stderr, "Usage: BLRewrite <infile> <outfile> <assigned base layer ID> [<max temporal ID>]\n"); |
---|
208 | exit(1); |
---|
209 | } |
---|
210 | |
---|
211 | inFile = fopen(argv[1], "rb"); |
---|
212 | if (inFile == NULL) |
---|
213 | { |
---|
214 | fprintf(stderr, "Cannot open input file %s\n", argv[1]); |
---|
215 | exit(1); |
---|
216 | } |
---|
217 | |
---|
218 | outFile = fopen(argv[2], "wb"); |
---|
219 | if (outFile == NULL) |
---|
220 | { |
---|
221 | fprintf(stderr, "Cannot open output file %s\n", argv[2]); |
---|
222 | exit(1); |
---|
223 | } |
---|
224 | |
---|
225 | assignedBaseLayerId = atoi(argv[3]); |
---|
226 | if (assignedBaseLayerId < 1 || assignedBaseLayerId > 7) |
---|
227 | { |
---|
228 | fprintf(stderr, "Invalid assigned base layer ID (must be in range 1-7)\n"); |
---|
229 | exit(1); |
---|
230 | } |
---|
231 | |
---|
232 | if (argc == 5) |
---|
233 | { |
---|
234 | tIdTarget = atoi(argv[4]); |
---|
235 | if (tIdTarget < 0 || tIdTarget > 6) |
---|
236 | { |
---|
237 | fprintf(stderr, "Invalid maximum temporal ID (must be in range 0-6)\n"); |
---|
238 | exit(1); |
---|
239 | } |
---|
240 | } |
---|
241 | |
---|
242 | while (1) |
---|
243 | { |
---|
244 | if (!findStartCodePrefix(inFile, &numStartCodeZeros)) |
---|
245 | { |
---|
246 | break; |
---|
247 | } |
---|
248 | if (!parseNalUnitHeader(inFile, &nalu)) |
---|
249 | { |
---|
250 | break; |
---|
251 | } |
---|
252 | |
---|
253 | printf("NAL unit type: %i, NUH layer ID: %i, NUH Temporal ID: %i\n", nalu.nalUnitType, nalu.nuhLayerId, nalu.nuhTemporalIdPlus1 - 1); |
---|
254 | |
---|
255 | nalIsSpsPpsEob = (nalu.nalUnitType == NAL_UNIT_SPS || nalu.nalUnitType == NAL_UNIT_PPS || nalu.nalUnitType == NAL_UNIT_EOB); |
---|
256 | |
---|
257 | removeNal = (!nalIsSpsPpsEob && (nalu.nuhLayerId != assignedBaseLayerId)) |
---|
258 | || (nalIsSpsPpsEob && (nalu.nuhLayerId != 0) && (nalu.nuhLayerId != assignedBaseLayerId)) |
---|
259 | || (nalu.nalUnitType == NAL_UNIT_VPS) |
---|
260 | || ((nalu.nuhTemporalIdPlus1 - 1) > tIdTarget); |
---|
261 | |
---|
262 | if (!removeNal) |
---|
263 | { |
---|
264 | /* Write current NAL unit to output bitstream */ |
---|
265 | |
---|
266 | long naluBytesStartPos; |
---|
267 | long numNaluBytes; |
---|
268 | long i; |
---|
269 | |
---|
270 | nalu.nuhLayerId = 0; |
---|
271 | writeStartCodePrefixAndNUH(outFile, numStartCodeZeros, &nalu); |
---|
272 | |
---|
273 | naluBytesStartPos = ftell(inFile); |
---|
274 | /* Find beginning of the next NAL unit to calculate length of the current unit */ |
---|
275 | if (findStartCodePrefix(inFile, &numStartCodeZeros)) |
---|
276 | { |
---|
277 | numNaluBytes = ftell(inFile) - naluBytesStartPos - numStartCodeZeros - 1; |
---|
278 | } |
---|
279 | else |
---|
280 | { |
---|
281 | numNaluBytes = ftell(inFile) - naluBytesStartPos; |
---|
282 | } |
---|
283 | fseek(inFile, naluBytesStartPos, SEEK_SET); |
---|
284 | |
---|
285 | for (i = 0; i < numNaluBytes; i++) |
---|
286 | { |
---|
287 | fputc(fgetc(inFile), outFile); |
---|
288 | } |
---|
289 | } |
---|
290 | } |
---|
291 | |
---|
292 | fclose(inFile); |
---|
293 | fclose(outFile); |
---|
294 | |
---|
295 | |
---|
296 | return 0; |
---|
297 | } |
---|