FFmpeg
channel_layout.c
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1 /*
2  * Copyright (c) 2021 James Almer
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 "libavutil/channel_layout.c"
22 
23 #define CHANNEL_NAME(x) \
24  av_bprint_clear(&bp); \
25  av_channel_name_bprint(&bp, x);
26 
27 #define CHANNEL_DESCRIPTION(x) \
28  av_bprint_clear(&bp); \
29  av_channel_description_bprint(&bp, x);
30 
31 #define CHANNEL_LAYOUT_FROM_MASK(x) \
32  av_channel_layout_uninit(&layout); \
33  av_bprint_clear(&bp); \
34  if (!av_channel_layout_from_mask(&layout, x) && \
35  av_channel_layout_check(&layout)) \
36  av_channel_layout_describe_bprint(&layout, &bp); \
37  else \
38  av_bprintf(&bp, "fail");
39 
40 #define CHANNEL_LAYOUT_FROM_STRING(x) \
41  av_channel_layout_uninit(&layout); \
42  av_bprint_clear(&bp); \
43  if (!av_channel_layout_from_string(&layout, x) && \
44  av_channel_layout_check(&layout)) \
45  av_channel_layout_describe_bprint(&layout, &bp); \
46  else \
47  av_bprintf(&bp, "fail");
48 
49 #define CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(x) \
50  ret = av_channel_layout_channel_from_index(&layout, x); \
51  if (ret < 0) \
52  ret = -1
53 
54 #define CHANNEL_LAYOUT_SUBSET(x) \
55  mask = av_channel_layout_subset(&layout, x)
56 
57 #define CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(x) \
58  ret = av_channel_layout_index_from_channel(&layout, x); \
59  if (ret < 0) \
60  ret = -1
61 
62 #define CHANNEL_LAYOUT_CHANNEL_FROM_STRING(x) \
63  ret = av_channel_layout_channel_from_string(&layout, x); \
64  if (ret < 0) \
65  ret = -1
66 
67 #define CHANNEL_LAYOUT_INDEX_FROM_STRING(x) \
68  ret = av_channel_layout_index_from_string(&layout, x); \
69  if (ret < 0) \
70  ret = -1
71 
72 int main(void)
73 {
74  const AVChannelLayout *playout;
75  AVChannelLayout layout = { 0 };
76  AVBPrint bp;
77  void *iter = NULL;
78  uint64_t mask;
79  int ret;
80 
81  av_bprint_init(&bp, 64, AV_BPRINT_SIZE_AUTOMATIC);
82 
83  printf("Testing av_channel_layout_standard\n");
84  while (playout = av_channel_layout_standard(&iter)) {
85  av_channel_layout_describe_bprint(playout, &bp);
86  printf("%-14s ", bp.str);
87  av_bprint_clear(&bp);
88  for (int i = 0; i < 63; i++) {
89  int idx = av_channel_layout_index_from_channel(playout, i);
90  if (idx >= 0) {
91  if (idx)
92  av_bprintf(&bp, "+");
93  av_channel_name_bprint(&bp, i);
94  }
95  }
96  printf("%s\n", bp.str);
97  av_bprint_clear(&bp);
98  }
99 
100  printf("\nTesting av_channel_name\n");
101  CHANNEL_NAME(AV_CHAN_FRONT_LEFT);
102  printf("With AV_CHAN_FRONT_LEFT: %27s\n", bp.str);
103  CHANNEL_NAME(AV_CHAN_FRONT_RIGHT);
104  printf("With AV_CHAN_FRONT_RIGHT: %26s\n", bp.str);
105  CHANNEL_NAME(63);
106  printf("With 63: %43s\n", bp.str);
107  CHANNEL_NAME(AV_CHAN_AMBISONIC_BASE);
108  printf("With AV_CHAN_AMBISONIC_BASE: %23s\n", bp.str);
109  CHANNEL_NAME(AV_CHAN_AMBISONIC_END);
110  printf("With AV_CHAN_AMBISONIC_END: %24s\n", bp.str);
111 
112  printf("Testing av_channel_description\n");
113  CHANNEL_DESCRIPTION(AV_CHAN_FRONT_LEFT);
114  printf("With AV_CHAN_FRONT_LEFT: %27s\n", bp.str);
115  CHANNEL_DESCRIPTION(AV_CHAN_FRONT_RIGHT);
116  printf("With AV_CHAN_FRONT_RIGHT: %26s\n", bp.str);
117  CHANNEL_DESCRIPTION(63);
118  printf("With 63: %43s\n", bp.str);
119  CHANNEL_DESCRIPTION(AV_CHAN_AMBISONIC_BASE);
120  printf("With AV_CHAN_AMBISONIC_BASE: %23s\n", bp.str);
121  CHANNEL_DESCRIPTION(AV_CHAN_AMBISONIC_END);
122  printf("With AV_CHAN_AMBISONIC_END: %24s\n", bp.str);
123 
124  printf("\nTesting av_channel_from_string\n");
125  printf("With \"FL\": %41d\n", av_channel_from_string("FL"));
126  printf("With \"FR\": %41d\n", av_channel_from_string("FR"));
127  printf("With \"USR63\": %38d\n", av_channel_from_string("USR63"));
128  printf("With \"AMBI0\": %38d\n", av_channel_from_string("AMBI0"));
129  printf("With \"AMBI1023\": %35d\n", av_channel_from_string("AMBI1023"));
130 
131  printf("\n==Native layouts==\n");
132 
133  printf("\nTesting av_channel_layout_from_string\n");
134  CHANNEL_LAYOUT_FROM_STRING("0x3f");
135  printf("With \"0x3f\": %39s\n", bp.str);
136  CHANNEL_LAYOUT_FROM_STRING("63");
137  printf("With \"63\": %41s\n", bp.str);
138  CHANNEL_LAYOUT_FROM_STRING("6c");
139  printf("With \"6c\": %41s\n", bp.str);
140  CHANNEL_LAYOUT_FROM_STRING("6C");
141  printf("With \"6C\": %41s\n", bp.str);
142  CHANNEL_LAYOUT_FROM_STRING("6 channels");
143  printf("With \"6 channels\": %33s\n", bp.str);
144  CHANNEL_LAYOUT_FROM_STRING("6 channels (FL+FR+FC+LFE+BL+BR)");
145  printf("With \"6 channels (FL+FR+FC+LFE+BL+BR)\": %12s\n", bp.str);
146  CHANNEL_LAYOUT_FROM_STRING("FL+FR+FC+LFE+BL+BR");
147  printf("With \"FL+FR+FC+LFE+BL+BR\": %25s\n", bp.str);
148  CHANNEL_LAYOUT_FROM_STRING("5.1");
149  printf("With \"5.1\": %40s\n", bp.str);
150  CHANNEL_LAYOUT_FROM_STRING("FL+FR+USR63");
151  printf("With \"FL+FR+USR63\": %32s\n", bp.str);
152  CHANNEL_LAYOUT_FROM_STRING("FL+FR+FC+LFE+SL+SR");
153  printf("With \"FL+FR+FC+LFE+SL+SR\": %25s\n", bp.str);
154  CHANNEL_LAYOUT_FROM_STRING("5.1(side)");
155  printf("With \"5.1(side)\": %34s\n", bp.str);
156 
157  printf("\nTesting av_channel_layout_from_mask\n");
158  CHANNEL_LAYOUT_FROM_MASK(AV_CH_LAYOUT_5POINT1);
159  printf("With AV_CH_LAYOUT_5POINT1: %25s\n", bp.str);
160 
161  printf("\nTesting av_channel_layout_channel_from_index\n");
162  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(0);
163  printf("On 5.1(side) layout with 0: %24d\n", ret);
164  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(1);
165  printf("On 5.1(side) layout with 1: %24d\n", ret);
166  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(2);
167  printf("On 5.1(side) layout with 2: %24d\n", ret);
168  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(3);
169  printf("On 5.1(side) layout with 3: %24d\n", ret);
170  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(4);
171  printf("On 5.1(side) layout with 4: %24d\n", ret);
172  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(5);
173  printf("On 5.1(side) layout with 5: %24d\n", ret);
174  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(6);
175  printf("On 5.1(side) layout with 6: %24d\n", ret);
176 
177  printf("\nTesting av_channel_layout_index_from_channel\n");
178  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_LEFT);
179  printf("On 5.1(side) layout with AV_CHAN_FRONT_LEFT: %7d\n", ret);
180  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_RIGHT);
181  printf("On 5.1(side) layout with AV_CHAN_FRONT_RIGHT: %6d\n", ret);
182  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_CENTER);
183  printf("On 5.1(side) layout with AV_CHAN_FRONT_CENTER: %5d\n", ret);
184  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_LOW_FREQUENCY);
185  printf("On 5.1(side) layout with AV_CHAN_LOW_FREQUENCY: %4d\n", ret);
186  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_SIDE_LEFT);
187  printf("On 5.1(side) layout with AV_CHAN_SIDE_LEFT: %8d\n", ret);
188  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_SIDE_RIGHT);
189  printf("On 5.1(side) layout with AV_CHAN_SIDE_RIGHT: %7d\n", ret);
190  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_BACK_CENTER);
191  printf("On 5.1(side) layout with AV_CHAN_BACK_CENTER: %6d\n", ret);
192 
193  printf("\nTesting av_channel_layout_channel_from_string\n");
194  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FL");
195  printf("On 5.1(side) layout with \"FL\": %21d\n", ret);
196  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FR");
197  printf("On 5.1(side) layout with \"FR\": %21d\n", ret);
198  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FC");
199  printf("On 5.1(side) layout with \"FC\": %21d\n", ret);
200  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("LFE");
201  printf("On 5.1(side) layout with \"LFE\": %20d\n", ret);
202  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("SL");
203  printf("On 5.1(side) layout with \"SL\": %21d\n", ret);
204  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("SR");
205  printf("On 5.1(side) layout with \"SR\": %21d\n", ret);
206  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("BC");
207  printf("On 5.1(side) layout with \"BC\": %21d\n", ret);
208 
209  printf("\nTesting av_channel_layout_index_from_string\n");
210  CHANNEL_LAYOUT_INDEX_FROM_STRING("FL");
211  printf("On 5.1(side) layout with \"FL\": %21d\n", ret);
212  CHANNEL_LAYOUT_INDEX_FROM_STRING("FR");
213  printf("On 5.1(side) layout with \"FR\": %21d\n", ret);
214  CHANNEL_LAYOUT_INDEX_FROM_STRING("FC");
215  printf("On 5.1(side) layout with \"FC\": %21d\n", ret);
216  CHANNEL_LAYOUT_INDEX_FROM_STRING("LFE");
217  printf("On 5.1(side) layout with \"LFE\": %20d\n", ret);
218  CHANNEL_LAYOUT_INDEX_FROM_STRING("SL");
219  printf("On 5.1(side) layout with \"SL\": %21d\n", ret);
220  CHANNEL_LAYOUT_INDEX_FROM_STRING("SR");
221  printf("On 5.1(side) layout with \"SR\": %21d\n", ret);
222  CHANNEL_LAYOUT_INDEX_FROM_STRING("BC");
223  printf("On 5.1(side) layout with \"BC\": %21d\n", ret);
224 
225  printf("\nTesting av_channel_layout_subset\n");
226  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_STEREO);
227  printf("On 5.1(side) layout with AV_CH_LAYOUT_STEREO: 0x%"PRIx64"\n", mask);
228  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_2POINT1);
229  printf("On 5.1(side) layout with AV_CH_LAYOUT_2POINT1: 0x%"PRIx64"\n", mask);
230  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_4POINT1);
231  printf("On 5.1(side) layout with AV_CH_LAYOUT_4POINT1: 0x%"PRIx64"\n", mask);
232 
233  printf("\n==Custom layouts==\n");
234 
235  printf("\nTesting av_channel_layout_from_string\n");
236  CHANNEL_LAYOUT_FROM_STRING("FL+FR+FC+BL+BR+LFE");
237  printf("With \"FL+FR+FC+BL+BR+LFE\": %34s\n", bp.str);
238  CHANNEL_LAYOUT_FROM_STRING("2 channels (FR+FL)");
239  printf("With \"2 channels (FR+FL)\": %34s\n", bp.str);
240  CHANNEL_LAYOUT_FROM_STRING("ambisonic 1+FR+FL");
241  printf("With \"ambisonic 1+FR+FL\": %35s\n", bp.str);
242  CHANNEL_LAYOUT_FROM_STRING("ambisonic 2+FC@Foo");
243  printf("With \"ambisonic 2+FC@Foo\": %34s\n", bp.str);
244  CHANNEL_LAYOUT_FROM_STRING("FL@Foo+FR@Bar");
245  printf("With \"FL@Foo+FR@Bar\": %39s\n", bp.str);
246  CHANNEL_LAYOUT_FROM_STRING("FR+FL@Foo+USR63@Foo");
247  printf("With \"FR+FL@Foo+USR63@Foo\": %33s\n", bp.str);
248 
249  printf("\nTesting av_channel_layout_index_from_string\n");
250  CHANNEL_LAYOUT_INDEX_FROM_STRING("FR");
251  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FR\": %18d\n", ret);
252  CHANNEL_LAYOUT_INDEX_FROM_STRING("FL");
253  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FL\": %18d\n", ret);
254  CHANNEL_LAYOUT_INDEX_FROM_STRING("USR63");
255  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"USR63\": %15d\n", ret);
256  CHANNEL_LAYOUT_INDEX_FROM_STRING("Foo");
257  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"Foo\": %17d\n", ret);
258  CHANNEL_LAYOUT_INDEX_FROM_STRING("@Foo");
259  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"@Foo\": %16d\n", ret);
260  CHANNEL_LAYOUT_INDEX_FROM_STRING("FR@Foo");
261  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FR@Foo\": %14d\n", ret);
262  CHANNEL_LAYOUT_INDEX_FROM_STRING("FL@Foo");
263  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FL@Foo\": %14d\n", ret);
264  CHANNEL_LAYOUT_INDEX_FROM_STRING("USR63@Foo");
265  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"USR63@Foo\": %11d\n", ret);
266  CHANNEL_LAYOUT_INDEX_FROM_STRING("BC");
267  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"BC\": %18d\n", ret);
268 
269  printf("\nTesting av_channel_layout_channel_from_string\n");
270  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FR");
271  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FR\": %18d\n", ret);
272  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FL");
273  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FL\": %18d\n", ret);
274  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("USR63");
275  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"USR63\": %15d\n", ret);
276  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("Foo");
277  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"Foo\": %17d\n", ret);
278  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("@Foo");
279  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"@Foo\": %16d\n", ret);
280  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FR@Foo");
281  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FR@Foo\": %14d\n", ret);
282  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("FL@Foo");
283  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"FL@Foo\": %14d\n", ret);
284  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("USR63@Foo");
285  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"USR63@Foo\": %11d\n", ret);
286  CHANNEL_LAYOUT_CHANNEL_FROM_STRING("BC");
287  printf("On \"FR+FL@Foo+USR63@Foo\" layout with \"BC\": %18d\n", ret);
288 
289  printf("\nTesting av_channel_layout_index_from_channel\n");
290  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_RIGHT);
291  printf("On \"FR+FL@Foo+USR63@Foo\" layout with AV_CHAN_FRONT_RIGHT: %3d\n", ret);
292  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_LEFT);
293  printf("On \"FR+FL@Foo+USR63@Foo\" layout with AV_CHAN_FRONT_LEFT: %4d\n", ret);
294  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(63);
295  printf("On \"FR+FL@Foo+USR63@Foo\" layout with 63: %20d\n", ret);
296  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_BACK_CENTER);
297  printf("On \"FR+FL@Foo+USR63@Foo\" layout with AV_CHAN_BACK_CENTER: %3d\n", ret);
298 
299  printf("\nTesting av_channel_layout_channel_from_index\n");
300  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(0);
301  printf("On \"FR+FL@Foo+USR63@Foo\" layout with 0: %21d\n", ret);
302  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(1);
303  printf("On \"FR+FL@Foo+USR63@Foo\" layout with 1: %21d\n", ret);
304  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(2);
305  printf("On \"FR+FL@Foo+USR63@Foo\" layout with 2: %21d\n", ret);
306  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(3);
307  printf("On \"FR+FL@Foo+USR63@Foo\" layout with 3: %21d\n", ret);
308 
309  printf("\nTesting av_channel_layout_subset\n");
310  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_STEREO);
311  printf("On \"FR+FL@Foo+USR63@Foo\" layout with AV_CH_LAYOUT_STEREO: 0x%"PRIx64"\n", mask);
312  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_QUAD);
313  printf("On \"FR+FL@Foo+USR63@Foo\" layout with AV_CH_LAYOUT_QUAD: 0x%"PRIx64"\n", mask);
314 
315  printf("\n==Ambisonic layouts==\n");
316 
317  printf("\nTesting av_channel_layout_from_string\n");
318  CHANNEL_LAYOUT_FROM_STRING("ambisonic 1");
319  printf("With \"ambisonic 1\": %41s\n", bp.str);
320  CHANNEL_LAYOUT_FROM_STRING("ambisonic 2+stereo");
321  printf("With \"ambisonic 2+stereo\": %34s\n", bp.str);
322 
323  printf("\nTesting av_channel_layout_index_from_channel\n");
324  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_AMBISONIC_BASE);
325  printf("On \"ambisonic 2+stereo\" layout with AV_CHAN_AMBISONIC_BASE: %d\n", ret);
326  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_LEFT);
327  printf("On \"ambisonic 2+stereo\" layout with AV_CHAN_FRONT_LEFT: %5d\n", ret);
328  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_FRONT_RIGHT);
329  printf("On \"ambisonic 2+stereo\" layout with AV_CHAN_FRONT_RIGHT: %4d\n", ret);
330  CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(AV_CHAN_BACK_CENTER);
331  printf("On \"ambisonic 2+stereo\" layout with AV_CHAN_BACK_CENTER: %4d\n", ret);
332 
333  printf("\nTesting av_channel_layout_channel_from_index\n");
334  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(0);
335  printf("On \"ambisonic 2+stereo\" layout with 0: %22d\n", ret);
336  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(9);
337  printf("On \"ambisonic 2+stereo\" layout with 9: %22d\n", ret);
338  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(10);
339  printf("On \"ambisonic 2+stereo\" layout with 10: %21d\n", ret);
340  CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(11);
341  printf("On \"ambisonic 2+stereo\" layout with 11: %21d\n", ret);
342 
343  printf("\nTesting av_channel_layout_subset\n");
344  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_STEREO);
345  printf("On \"ambisonic 2+stereo\" layout with AV_CH_LAYOUT_STEREO: 0x%"PRIx64"\n", mask);
346  CHANNEL_LAYOUT_SUBSET(AV_CH_LAYOUT_QUAD);
347  printf("On \"ambisonic 2+stereo\" layout with AV_CH_LAYOUT_QUAD: 0x%"PRIx64"\n", mask);
348 
349  av_channel_layout_uninit(&layout);
350  av_bprint_finalize(&bp, NULL);
351 
352  return 0;
353 }
CHANNEL_DESCRIPTION
#define CHANNEL_DESCRIPTION(x)
Definition: channel_layout.c:27
av_bprint_finalize
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
av_bprint_init
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
AV_CHAN_LOW_FREQUENCY
@ AV_CHAN_LOW_FREQUENCY
Definition: channel_layout.h:47
CHANNEL_LAYOUT_FROM_STRING
#define CHANNEL_LAYOUT_FROM_STRING(x)
Definition: channel_layout.c:40
AV_BPRINT_SIZE_AUTOMATIC
#define AV_BPRINT_SIZE_AUTOMATIC
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:205
AV_CHAN_AMBISONIC_END
@ AV_CHAN_AMBISONIC_END
Definition: channel_layout.h:98
AV_CH_LAYOUT_QUAD
#define AV_CH_LAYOUT_QUAD
Definition: channel_layout.h:213
av_channel_layout_describe_bprint
int av_channel_layout_describe_bprint(const AVChannelLayout *channel_layout, AVBPrint *bp)
bprint variant of av_channel_layout_describe().
Definition: channel_layout.c:730
mask
static const uint16_t mask[17]
Definition: lzw.c:38
AV_CHAN_FRONT_RIGHT
@ AV_CHAN_FRONT_RIGHT
Definition: channel_layout.h:45
CHANNEL_LAYOUT_CHANNEL_FROM_INDEX
#define CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(x)
Definition: channel_layout.c:49
CHANNEL_LAYOUT_CHANNEL_FROM_STRING
#define CHANNEL_LAYOUT_CHANNEL_FROM_STRING(x)
Definition: channel_layout.c:62
NULL
#define NULL
Definition: coverity.c:32
CHANNEL_LAYOUT_SUBSET
#define CHANNEL_LAYOUT_SUBSET(x)
Definition: channel_layout.c:54
AV_CHAN_AMBISONIC_BASE
@ AV_CHAN_AMBISONIC_BASE
Range of channels between AV_CHAN_AMBISONIC_BASE and AV_CHAN_AMBISONIC_END represent Ambisonic compon...
Definition: channel_layout.h:95
channel_layout.c
AV_CHAN_FRONT_LEFT
@ AV_CHAN_FRONT_LEFT
Definition: channel_layout.h:44
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition: channel_layout.h:215
main
int main(void)
Definition: channel_layout.c:72
av_channel_layout_uninit
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
Definition: channel_layout.c:630
AV_CHAN_SIDE_RIGHT
@ AV_CHAN_SIDE_RIGHT
Definition: channel_layout.h:54
CHANNEL_LAYOUT_FROM_MASK
#define CHANNEL_LAYOUT_FROM_MASK(x)
Definition: channel_layout.c:31
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
av_channel_from_string
enum AVChannel av_channel_from_string(const char *str)
This is the inverse function of av_channel_name().
Definition: channel_layout.c:141
AV_CHAN_BACK_CENTER
@ AV_CHAN_BACK_CENTER
Definition: channel_layout.h:52
printf
printf("static const uint8_t my_array[100] = {\n")
AV_CHAN_SIDE_LEFT
@ AV_CHAN_SIDE_LEFT
Definition: channel_layout.h:53
av_channel_layout_standard
const AVChannelLayout * av_channel_layout_standard(void **opaque)
Iterate over all standard channel layouts.
Definition: channel_layout.c:973
layout
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel layout
Definition: filter_design.txt:18
CHANNEL_NAME
#define CHANNEL_NAME(x)
Definition: channel_layout.c:23
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AV_CH_LAYOUT_2POINT1
#define AV_CH_LAYOUT_2POINT1
Definition: channel_layout.h:206
AV_CHAN_FRONT_CENTER
@ AV_CHAN_FRONT_CENTER
Definition: channel_layout.h:46
AV_CH_LAYOUT_4POINT1
#define AV_CH_LAYOUT_4POINT1
Definition: channel_layout.h:211
av_channel_layout_index_from_channel
int av_channel_layout_index_from_channel(const AVChannelLayout *channel_layout, enum AVChannel channel)
Get the index of a given channel in a channel layout.
Definition: channel_layout.c:834
ret
ret
Definition: filter_design.txt:187
CHANNEL_LAYOUT_INDEX_FROM_STRING
#define CHANNEL_LAYOUT_INDEX_FROM_STRING(x)
Definition: channel_layout.c:67
av_bprintf
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
av_bprint_clear
void av_bprint_clear(AVBPrint *buf)
Reset the string to "" but keep internal allocated data.
Definition: bprint.c:227
av_channel_name_bprint
void av_channel_name_bprint(AVBPrint *bp, enum AVChannel channel_id)
bprint variant of av_channel_name().
Definition: channel_layout.c:87
CHANNEL_LAYOUT_INDEX_FROM_CHANNEL
#define CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(x)
Definition: channel_layout.c:57
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