FFmpeg
mov_chan.c
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1 /*
2  * Copyright (c) 2011 Justin Ruggles
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 /**
22  * mov 'chan' tag reading/writing.
23  * @author Justin Ruggles
24  */
25 
26 #include <assert.h>
27 #include <stdint.h>
28 
29 #include "libavutil/avassert.h"
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/mem.h"
32 #include "libavcodec/codec_id.h"
33 #include "mov_chan.h"
34 
35 enum {
36  c_L = AV_CHAN_FRONT_LEFT,
37  c_R = AV_CHAN_FRONT_RIGHT,
38  c_C = AV_CHAN_FRONT_CENTER,
39  c_LFE = AV_CHAN_LOW_FREQUENCY,
40  c_Rls = AV_CHAN_BACK_LEFT,
41  c_Rrs = AV_CHAN_BACK_RIGHT,
42  c_Lc = AV_CHAN_FRONT_LEFT_OF_CENTER,
43  c_Rc = AV_CHAN_FRONT_RIGHT_OF_CENTER,
44  c_Cs = AV_CHAN_BACK_CENTER,
45  c_Ls = AV_CHAN_SIDE_LEFT,
46  c_Rs = AV_CHAN_SIDE_RIGHT,
47  c_Ts = AV_CHAN_TOP_CENTER,
48  c_Vhl = AV_CHAN_TOP_FRONT_LEFT,
49  c_Vhc = AV_CHAN_TOP_FRONT_CENTER,
50  c_Vhr = AV_CHAN_TOP_FRONT_RIGHT,
51  c_Rlt = AV_CHAN_TOP_BACK_LEFT,
52  // = AV_CHAN_TOP_BACK_CENTER,
53  c_Rrt = AV_CHAN_TOP_BACK_RIGHT,
54  c_Lt = AV_CHAN_STEREO_LEFT,
55  c_Rt = AV_CHAN_STEREO_RIGHT,
56  c_Lw = AV_CHAN_WIDE_LEFT,
57  c_Rw = AV_CHAN_WIDE_RIGHT,
58  c_Lsd = AV_CHAN_SURROUND_DIRECT_LEFT,
59  c_Rsd = AV_CHAN_SURROUND_DIRECT_RIGHT,
60  c_LFE2 = AV_CHAN_LOW_FREQUENCY_2,
61  // = AV_CHAN_TOP_SIDE_LEFT,
62  // = AV_CHAN_TOP_SIDE_RIGHT,
63  // = AV_CHAN_BOTTOM_FRONT_CENTER,
64  // = AV_CHAN_BOTTOM_FRONT_LEFT,
65  // = AV_CHAN_BOTTOM_FRONT_RIGHT,
66  c_W = AV_CHAN_AMBISONIC_BASE,
67  c_Y = AV_CHAN_AMBISONIC_BASE + 1,
68  c_Z = AV_CHAN_AMBISONIC_BASE + 2,
69  c_X = AV_CHAN_AMBISONIC_BASE + 3,
70  /* The following have no exact counterparts */
71  c_LFE1 = AV_CHAN_LOW_FREQUENCY,
72  c_Csd = AV_CHAN_NONE,
73  c_HI = AV_CHAN_NONE,
74  c_VI = AV_CHAN_NONE,
75  c_Haptic = AV_CHAN_NONE,
76 };
77 
78 enum {
79  iso_L = AV_CHAN_FRONT_LEFT,
80  iso_R = AV_CHAN_FRONT_RIGHT,
81  iso_C = AV_CHAN_FRONT_CENTER,
82  iso_LFE = AV_CHAN_LOW_FREQUENCY,
83  iso_Lsr = AV_CHAN_BACK_LEFT,
84  iso_Rsr = AV_CHAN_BACK_RIGHT,
85  iso_Lc = AV_CHAN_FRONT_LEFT_OF_CENTER,
86  iso_Rc = AV_CHAN_FRONT_RIGHT_OF_CENTER,
87  iso_Cs = AV_CHAN_BACK_CENTER,
88  iso_Ls = AV_CHAN_SIDE_LEFT,
89  iso_Rs = AV_CHAN_SIDE_RIGHT,
90  iso_Ts = AV_CHAN_TOP_CENTER,
91  iso_Lv = AV_CHAN_TOP_FRONT_LEFT,
92  iso_Cv = AV_CHAN_TOP_FRONT_CENTER,
93  iso_Rv = AV_CHAN_TOP_FRONT_RIGHT,
94  iso_Lvr = AV_CHAN_TOP_BACK_LEFT,
95  iso_Cvr = AV_CHAN_TOP_BACK_CENTER,
96  iso_Rvr = AV_CHAN_TOP_BACK_RIGHT,
97  // = AV_CHAN_STEREO_LEFT,
98  // = AV_CHAN_STEREO_RIGHT,
99  iso_Lw = AV_CHAN_WIDE_LEFT,
100  iso_Rw = AV_CHAN_WIDE_RIGHT,
101  iso_Lsd = AV_CHAN_SURROUND_DIRECT_LEFT,
102  iso_Rsd = AV_CHAN_SURROUND_DIRECT_RIGHT,
103  iso_LFE2 = AV_CHAN_LOW_FREQUENCY_2,
104  iso_Lvss = AV_CHAN_TOP_SIDE_LEFT,
105  iso_Rvss = AV_CHAN_TOP_SIDE_RIGHT,
106  iso_Cb = AV_CHAN_BOTTOM_FRONT_CENTER,
107  iso_Lb = AV_CHAN_BOTTOM_FRONT_LEFT,
108  iso_Rb = AV_CHAN_BOTTOM_FRONT_RIGHT,
109  iso_Lss = AV_CHAN_SIDE_SURROUND_LEFT,
110  iso_Rss = AV_CHAN_SIDE_SURROUND_RIGHT,
111  /* The following have no exact counterparts */
112  iso_Lvs = AV_CHAN_NONE,
113  iso_Rvs = AV_CHAN_NONE,
114 };
115 
116 struct MovChannelLayoutMap {
117  union {
118  uint32_t tag;
119  enum AVChannel id;
120  };
121 };
122 
123 #define TAG(_tag, _cnt) {.tag = _tag}
124 #define ID(_0) {.id = c_##_0}
125 #define CHLIST01(_tag, _1) CHLIST(_tag, 1, ID(_1))
126 #define CHLIST02(_tag, _1, _2) CHLIST(_tag, 2, ID(_1), ID(_2))
127 #define CHLIST03(_tag, _1, _2, _3) CHLIST(_tag, 3, ID(_1), ID(_2), ID(_3))
128 #define CHLIST04(_tag, _1, _2, _3, _4) CHLIST(_tag, 4, ID(_1), ID(_2), ID(_3), ID(_4))
129 #define CHLIST05(_tag, _1, _2, _3, _4, _5) CHLIST(_tag, 5, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5))
130 #define CHLIST06(_tag, _1, _2, _3, _4, _5, _6) CHLIST(_tag, 6, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6))
131 #define CHLIST07(_tag, _1, _2, _3, _4, _5, _6, _7) CHLIST(_tag, 7, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7))
132 #define CHLIST08(_tag, _1, _2, _3, _4, _5, _6, _7, _8) CHLIST(_tag, 8, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8))
133 #define CHLIST09(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9) CHLIST(_tag, 9, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9))
134 #define CHLIST16(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16) \
135  CHLIST(_tag, 16, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \
136  ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16))
137 #define CHLIST21(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21) \
138  CHLIST(_tag, 21, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \
139  ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16), ID(_17), ID(_18), ID(_19), ID(_20), ID(_21))
140 #define CHLIST24(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24) \
141  CHLIST(_tag, 24, ID(_1), ID(_2), ID(_3), ID(_4), ID(_5), ID(_6), ID(_7), ID(_8), ID(_9), ID(_10), \
142  ID(_11), ID(_12), ID(_13), ID(_14), ID(_15), ID(_16), ID(_17), ID(_18), ID(_19), ID(_20), \
143  ID(_21), ID(_22), ID(_23), ID(_24))
144 
145 #define MOV_CH_LAYOUT_MAP \
146  CHLIST01( MOV_CH_LAYOUT_MONO, C )\
147  CHLIST02( MOV_CH_LAYOUT_STEREO, L, R )\
148  CHLIST02( MOV_CH_LAYOUT_STEREOHEADPHONES, L, R )\
149  CHLIST02( MOV_CH_LAYOUT_BINAURAL, L, R )\
150  CHLIST02( MOV_CH_LAYOUT_MIDSIDE, L, R )\
151  CHLIST02( MOV_CH_LAYOUT_XY, L, R )\
152  CHLIST02( MOV_CH_LAYOUT_MATRIXSTEREO, Lt, Rt )\
153  CHLIST02( MOV_CH_LAYOUT_AC3_1_0_1, C, LFE )\
154  CHLIST03( MOV_CH_LAYOUT_MPEG_3_0_A, L, R, C )\
155  CHLIST03( MOV_CH_LAYOUT_MPEG_3_0_B, C, L, R )\
156  CHLIST03( MOV_CH_LAYOUT_AC3_3_0, L, C, R )\
157  CHLIST03( MOV_CH_LAYOUT_ITU_2_1, L, R, Cs )\
158  CHLIST03( MOV_CH_LAYOUT_DVD_4, L, R, LFE )\
159  CHLIST04( MOV_CH_LAYOUT_AMBISONIC_B_FORMAT, W, X, Y, Z )\
160  CHLIST04( MOV_CH_LAYOUT_QUADRAPHONIC, L, R, Rls, Rrs )\
161  CHLIST04( MOV_CH_LAYOUT_MPEG_4_0_A, L, R, C, Cs )\
162  CHLIST04( MOV_CH_LAYOUT_MPEG_4_0_B, C, L, R, Cs )\
163  CHLIST04( MOV_CH_LAYOUT_AC3_3_1, L, C, R, Cs )\
164  CHLIST04( MOV_CH_LAYOUT_ITU_2_2, L, R, Ls, Rs )\
165  CHLIST04( MOV_CH_LAYOUT_DVD_5, L, R, LFE, Cs )\
166  CHLIST04( MOV_CH_LAYOUT_AC3_2_1_1, L, R, Cs, LFE )\
167  CHLIST04( MOV_CH_LAYOUT_DVD_10, L, R, C, LFE )\
168  CHLIST04( MOV_CH_LAYOUT_AC3_3_0_1, L, C, R, LFE )\
169  CHLIST04( MOV_CH_LAYOUT_DTS_3_1, C, L, R, LFE )\
170  CHLIST05( MOV_CH_LAYOUT_PENTAGONAL, L, R, Rls, Rrs, C )\
171  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_A, L, R, C, Ls, Rs )\
172  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_B, L, R, Ls, Rs, C )\
173  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_C, L, C, R, Ls, Rs )\
174  CHLIST05( MOV_CH_LAYOUT_MPEG_5_0_D, C, L, R, Ls, Rs )\
175  CHLIST05( MOV_CH_LAYOUT_DVD_6, L, R, LFE, Ls, Rs )\
176  CHLIST05( MOV_CH_LAYOUT_DVD_18, L, R, Ls, Rs, LFE )\
177  CHLIST05( MOV_CH_LAYOUT_DVD_11, L, R, C, LFE, Cs )\
178  CHLIST05( MOV_CH_LAYOUT_AC3_3_1_1, L, C, R, Cs, LFE )\
179  CHLIST05( MOV_CH_LAYOUT_DTS_4_1, C, L, R, Cs, LFE )\
180  CHLIST06( MOV_CH_LAYOUT_HEXAGONAL, L, R, Rls, Rrs, C, Cs )\
181  CHLIST06( MOV_CH_LAYOUT_DTS_6_0_C, C, Cs, L, R, Rls, Rrs )\
182  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_A, L, R, C, LFE, Ls, Rs )\
183  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_B, L, R, Ls, Rs, C, LFE )\
184  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_C, L, C, R, Ls, Rs, LFE )\
185  CHLIST06( MOV_CH_LAYOUT_MPEG_5_1_D, C, L, R, Ls, Rs, LFE )\
186  CHLIST06( MOV_CH_LAYOUT_AUDIOUNIT_6_0, L, R, Ls, Rs, C, Cs )\
187  CHLIST06( MOV_CH_LAYOUT_AAC_6_0, C, L, R, Ls, Rs, Cs )\
188  CHLIST06( MOV_CH_LAYOUT_EAC3_6_0_A, L, C, R, Ls, Rs, Cs )\
189  CHLIST06( MOV_CH_LAYOUT_DTS_6_0_A, Lc, Rc, L, R, Ls, Rs )\
190  CHLIST06( MOV_CH_LAYOUT_DTS_6_0_B, C, L, R, Rls, Rrs, Ts )\
191  CHLIST07( MOV_CH_LAYOUT_MPEG_6_1_A, L, R, C, LFE, Ls, Rs, Cs )\
192  CHLIST07( MOV_CH_LAYOUT_AAC_6_1, C, L, R, Ls, Rs, Cs, LFE )\
193  CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_A, L, C, R, Ls, Rs, LFE, Cs )\
194  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_D, C, L, R, Ls, Rs, LFE, Cs )\
195  CHLIST07( MOV_CH_LAYOUT_AUDIOUNIT_7_0, L, R, Ls, Rs, C, Rls, Rrs )\
196  CHLIST07( MOV_CH_LAYOUT_AAC_7_0, C, L, R, Ls, Rs, Rls, Rrs )\
197  CHLIST07( MOV_CH_LAYOUT_EAC3_7_0_A, L, C, R, Ls, Rs, Rls, Rrs )\
198  CHLIST07( MOV_CH_LAYOUT_AUDIOUNIT_7_0_FRONT, L, R, Ls, Rs, C, Lc, Rc )\
199  CHLIST07( MOV_CH_LAYOUT_DTS_7_0, Lc, C, Rc, L, R, Ls, Rs )\
200  CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_B, L, C, R, Ls, Rs, LFE, Ts )\
201  CHLIST07( MOV_CH_LAYOUT_EAC3_6_1_C, L, C, R, Ls, Rs, LFE, Vhc )\
202  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_A, Lc, Rc, L, R, Ls, Rs, LFE )\
203  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_B, C, L, R, Rls, Rrs, Ts, LFE )\
204  CHLIST07( MOV_CH_LAYOUT_DTS_6_1_C, C, Cs, L, R, Rls, Rrs, LFE )\
205  CHLIST08( MOV_CH_LAYOUT_OCTAGONAL, L, R, Rls, Rrs, C, Cs, Ls, Rs )\
206  CHLIST08( MOV_CH_LAYOUT_AAC_OCTAGONAL, C, L, R, Ls, Rs, Rls, Rrs, Cs )\
207  CHLIST08( MOV_CH_LAYOUT_CUBE, L, R, Rls, Rrs, Vhl, Vhr, Rlt, Rrt )\
208  CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_A, L, R, C, LFE, Ls, Rs, Lc, Rc )\
209  CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_B, C, Lc, Rc, L, R, Ls, Rs, LFE )\
210  CHLIST08( MOV_CH_LAYOUT_EMAGIC_DEFAULT_7_1, L, R, Ls, Rs, C, LFE, Lc, Rc )\
211  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_B, L, C, R, Ls, Rs, LFE, Lc, Rc )\
212  CHLIST08( MOV_CH_LAYOUT_DTS_7_1, Lc, C, Rc, L, R, Ls, Rs, LFE )\
213  CHLIST08( MOV_CH_LAYOUT_MPEG_7_1_C, L, R, C, LFE, Ls, Rs, Rls, Rrs )\
214  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_A, L, C, R, Ls, Rs, LFE, Rls, Rrs )\
215  CHLIST08( MOV_CH_LAYOUT_SMPTE_DTV, L, R, C, LFE, Ls, Rs, Lt, Rt )\
216  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_C, L, C, R, Ls, Rs, LFE, Lsd, Rsd )\
217  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_D, L, C, R, Ls, Rs, LFE, Lw, Rw )\
218  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_E, L, C, R, Ls, Rs, LFE, Vhl, Vhr )\
219  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_F, L, C, R, Ls, Rs, LFE, Cs, Ts )\
220  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_G, L, C, R, Ls, Rs, LFE, Cs, Vhc )\
221  CHLIST08( MOV_CH_LAYOUT_EAC3_7_1_H, L, C, R, Ls, Rs, LFE, Ts, Vhc )\
222  CHLIST08( MOV_CH_LAYOUT_DTS_8_0_A, Lc, Rc, L, R, Ls, Rs, Rls, Rrs )\
223  CHLIST08( MOV_CH_LAYOUT_DTS_8_0_B, Lc, C, Rc, L, R, Ls, Cs, Rs )\
224  CHLIST09( MOV_CH_LAYOUT_DTS_8_1_A, Lc, Rc, L, R, Ls, Rs, Rls, Rrs, LFE )\
225  CHLIST09( MOV_CH_LAYOUT_DTS_8_1_B, Lc, C, Rc, L, R, Ls, Cs, Rs, LFE )\
226  CHLIST16( MOV_CH_LAYOUT_TMH_10_2_STD, L, R, C, Vhc, Lsd, Rsd, Ls, Rs, Vhl, Vhr, Lw, Rw, Csd, Cs, LFE1, LFE2 )\
227  CHLIST21( MOV_CH_LAYOUT_TMH_10_2_FULL, L, R, C, Vhc, Lsd, Rsd, Ls, Rs, Vhl, Vhr, Lw, Rw, Csd, Cs, LFE1, LFE2, Lc, Rc, HI, VI, Haptic )\
228 
229 #define CHLIST(_tag, _cnt, ...) static_assert((_tag & 0xffff) == _cnt, "Channel count of " #_tag " is not " #_cnt);
230 MOV_CH_LAYOUT_MAP
231 #undef CHLIST
232 #define CHLIST(_tag, _cnt, ...) TAG(_tag, _cnt), __VA_ARGS__,
233 static const struct MovChannelLayoutMap mov_ch_layout_map[] = {
234  MOV_CH_LAYOUT_MAP
235  { {0} },
236 };
237 
238 #undef ID
239 #undef TAG
240 #define ID(_0) {.id = iso_##_0}
241 #define TAG(_tag, _cnt) {.tag = (_tag << 16) | _cnt}
242 
243 /* ISO/IEC 23001-8 */
244 static const struct MovChannelLayoutMap iso_ch_layout_map[] = {
245  CHLIST01( 1, C )
246  CHLIST02( 2, L, R )
247  CHLIST03( 3, C, L, R )
248  CHLIST04( 4, C, L, R, Cs )
249  CHLIST05( 5, C, L, R, Ls, Rs )
250  CHLIST06( 6, C, L, R, Ls, Rs, LFE )
251  CHLIST08( 7, C, Lc, Rc, L, R, Ls, Rs, LFE )
252  CHLIST03( 9, L, R, Cs )
253  CHLIST04( 10, L, R, Ls, Rs )
254  CHLIST07( 11, C, L, R, Ls, Rs, Cs, LFE )
255  CHLIST08( 12, C, L, R, Ls, Rs, Lsr, Rsr, LFE )
256  CHLIST24( 13, C, Lc, Rc, L, R, Lss, Rss, Lsr, Rsr, Cs, LFE, LFE2, Cv, Lv, Rv, Lvss, Rvss, Ts, Lvr, Rvr, Cvr, Cb, Lb, Rb)
257  CHLIST08( 14, C, L, R, Ls, Rs, LFE, Lv, Rv)
258  { {0} },
259 };
260 
261 static const enum MovChannelLayoutTag mov_ch_layouts_aac[] = {
262  MOV_CH_LAYOUT_MONO,
263  MOV_CH_LAYOUT_STEREO,
264  MOV_CH_LAYOUT_AC3_1_0_1,
265  MOV_CH_LAYOUT_MPEG_3_0_B,
266  MOV_CH_LAYOUT_ITU_2_1,
267  MOV_CH_LAYOUT_DVD_4,
268  MOV_CH_LAYOUT_QUADRAPHONIC,
269  MOV_CH_LAYOUT_MPEG_4_0_B,
270  MOV_CH_LAYOUT_ITU_2_2,
271  MOV_CH_LAYOUT_AC3_2_1_1,
272  MOV_CH_LAYOUT_DTS_3_1,
273  MOV_CH_LAYOUT_MPEG_5_0_D,
274  MOV_CH_LAYOUT_DVD_18,
275  MOV_CH_LAYOUT_DTS_4_1,
276  MOV_CH_LAYOUT_MPEG_5_1_D,
277  MOV_CH_LAYOUT_AAC_6_0,
278  MOV_CH_LAYOUT_DTS_6_0_A,
279  MOV_CH_LAYOUT_AAC_6_1,
280  MOV_CH_LAYOUT_AAC_7_0,
281  MOV_CH_LAYOUT_DTS_6_1_A,
282  MOV_CH_LAYOUT_AAC_OCTAGONAL,
283  MOV_CH_LAYOUT_MPEG_7_1_B,
284  MOV_CH_LAYOUT_DTS_8_0_A,
285  0,
286 };
287 
288 static const enum MovChannelLayoutTag mov_ch_layouts_ac3[] = {
289  MOV_CH_LAYOUT_MONO,
290  MOV_CH_LAYOUT_STEREO,
291  MOV_CH_LAYOUT_AC3_1_0_1,
292  MOV_CH_LAYOUT_AC3_3_0,
293  MOV_CH_LAYOUT_ITU_2_1,
294  MOV_CH_LAYOUT_DVD_4,
295  MOV_CH_LAYOUT_AC3_3_1,
296  MOV_CH_LAYOUT_ITU_2_2,
297  MOV_CH_LAYOUT_AC3_2_1_1,
298  MOV_CH_LAYOUT_AC3_3_0_1,
299  MOV_CH_LAYOUT_MPEG_5_0_C,
300  MOV_CH_LAYOUT_DVD_18,
301  MOV_CH_LAYOUT_AC3_3_1_1,
302  MOV_CH_LAYOUT_MPEG_5_1_C,
303  0,
304 };
305 
306 static const enum MovChannelLayoutTag mov_ch_layouts_alac[] = {
307  MOV_CH_LAYOUT_MONO,
308  MOV_CH_LAYOUT_STEREO,
309  MOV_CH_LAYOUT_MPEG_3_0_B,
310  MOV_CH_LAYOUT_MPEG_4_0_B,
311  MOV_CH_LAYOUT_MPEG_5_0_D,
312  MOV_CH_LAYOUT_MPEG_5_1_D,
313  MOV_CH_LAYOUT_AAC_6_1,
314  MOV_CH_LAYOUT_MPEG_7_1_B,
315  0,
316 };
317 
318 static const enum MovChannelLayoutTag mov_ch_layouts_wav[] = {
319  MOV_CH_LAYOUT_MONO,
320  MOV_CH_LAYOUT_STEREO,
321  MOV_CH_LAYOUT_MATRIXSTEREO,
322  MOV_CH_LAYOUT_MPEG_3_0_A,
323  MOV_CH_LAYOUT_QUADRAPHONIC,
324  MOV_CH_LAYOUT_MPEG_5_0_A,
325  MOV_CH_LAYOUT_MPEG_5_1_A,
326  MOV_CH_LAYOUT_MPEG_6_1_A,
327  MOV_CH_LAYOUT_MPEG_7_1_A,
328  MOV_CH_LAYOUT_MPEG_7_1_C,
329  MOV_CH_LAYOUT_SMPTE_DTV,
330  0,
331 };
332 
333 static const struct {
334  enum AVCodecID codec_id;
335  const enum MovChannelLayoutTag *layouts;
336 } mov_codec_ch_layouts[] = {
337  { AV_CODEC_ID_AAC, mov_ch_layouts_aac },
338  { AV_CODEC_ID_AC3, mov_ch_layouts_ac3 },
339  { AV_CODEC_ID_ADPCM_IMA_QT, mov_ch_layouts_wav },
340  { AV_CODEC_ID_ALAC, mov_ch_layouts_alac },
341  { AV_CODEC_ID_MACE3, mov_ch_layouts_wav },
342  { AV_CODEC_ID_MACE6, mov_ch_layouts_wav },
343  { AV_CODEC_ID_PCM_ALAW, mov_ch_layouts_wav },
344  { AV_CODEC_ID_PCM_F32BE, mov_ch_layouts_wav },
345  { AV_CODEC_ID_PCM_F32LE, mov_ch_layouts_wav },
346  { AV_CODEC_ID_PCM_F64BE, mov_ch_layouts_wav },
347  { AV_CODEC_ID_PCM_F64LE, mov_ch_layouts_wav },
348  { AV_CODEC_ID_PCM_MULAW, mov_ch_layouts_wav },
349  { AV_CODEC_ID_PCM_S16BE, mov_ch_layouts_wav },
350  { AV_CODEC_ID_PCM_S16LE, mov_ch_layouts_wav },
351  { AV_CODEC_ID_PCM_S24BE, mov_ch_layouts_wav },
352  { AV_CODEC_ID_PCM_S24LE, mov_ch_layouts_wav },
353  { AV_CODEC_ID_PCM_S32BE, mov_ch_layouts_wav },
354  { AV_CODEC_ID_PCM_S32LE, mov_ch_layouts_wav },
355  { AV_CODEC_ID_PCM_S8, mov_ch_layouts_wav },
356  { AV_CODEC_ID_PCM_U8, mov_ch_layouts_wav },
357  { AV_CODEC_ID_SPEEX, mov_ch_layouts_wav },
358  { AV_CODEC_ID_NONE, NULL },
359 };
360 
361 static const struct MovChannelLayoutMap* find_layout_map(uint32_t tag, const struct MovChannelLayoutMap *map)
362 {
363  for (int i = 0; map[i].tag & 0xffff; i += 1 + (map[i].tag & 0xffff))
364  if (map[i].tag == tag)
365  return &map[i + 1];
366  return NULL;
367 }
368 
369 /**
370  * Get the channel layout for the specified non-special channel layout tag if
371  * known.
372  *
373  * @param[in,out] ch_layout channel layout
374  * @param[in] tag channel layout tag
375  * @return <0 on error
376  */
377 static int mov_get_channel_layout(AVChannelLayout *ch_layout, uint32_t tag, uint64_t omitted_channel_map, const struct MovChannelLayoutMap *map)
378 {
379  const struct MovChannelLayoutMap *layout_map;
380 
381  /* find the channel layout for the specified layout tag */
382  layout_map = find_layout_map(tag, map);
383  if (layout_map) {
384  int ret;
385  int map_layout_nb_channels = tag & 0xFFFF;
386  int nb_channels = ch_layout->nb_channels;
387 
388  /* Omitted channel bits must not exceed number of channels in map */
389  if (omitted_channel_map >> map_layout_nb_channels)
390  return AVERROR_INVALIDDATA;
391 
392  av_channel_layout_uninit(ch_layout);
393  ret = av_channel_layout_custom_init(ch_layout, nb_channels);
394  if (ret < 0)
395  return ret;
396 
397  for (int i = 0, idx = 0; i < map_layout_nb_channels && idx < nb_channels; i++, omitted_channel_map >>= 1) {
398  if (!(omitted_channel_map & 1)) {
399  enum AVChannel id = layout_map[i].id;
400  ch_layout->u.map[idx++].id = (id != AV_CHAN_NONE ? id : AV_CHAN_UNKNOWN);
401  }
402  }
403 
404  return av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL);
405  }
406  return 0;
407 }
408 
409 static enum AVChannel mov_get_channel_id(uint32_t label)
410 {
411  if (label == 0)
412  return AV_CHAN_UNUSED;
413  if (label <= 18)
414  return (label - 1);
415  if (label == 35)
416  return AV_CHAN_WIDE_LEFT;
417  if (label == 36)
418  return AV_CHAN_WIDE_RIGHT;
419  if (label == 37)
420  return AV_CHAN_LOW_FREQUENCY_2;
421  if (label == 38)
422  return AV_CHAN_STEREO_LEFT;
423  if (label == 39)
424  return AV_CHAN_STEREO_RIGHT;
425  return AV_CHAN_UNKNOWN;
426 }
427 
428 static uint32_t mov_get_channel_label(enum AVChannel channel)
429 {
430  if (channel < 0)
431  return 0;
432  if (channel <= AV_CHAN_TOP_BACK_RIGHT)
433  return channel + 1;
434  if (channel == AV_CHAN_WIDE_LEFT)
435  return 35;
436  if (channel == AV_CHAN_WIDE_RIGHT)
437  return 36;
438  if (channel == AV_CHAN_LOW_FREQUENCY_2)
439  return 37;
440  if (channel == AV_CHAN_STEREO_LEFT)
441  return 38;
442  if (channel == AV_CHAN_STEREO_RIGHT)
443  return 39;
444  return 0;
445 }
446 
447 static int is_layout_valid_for_tag(const AVChannelLayout *ch_layout, uint32_t tag, const struct MovChannelLayoutMap *map)
448 {
449  const struct MovChannelLayoutMap *layout_map;
450  int channels = ch_layout->nb_channels;
451 
452  /* get the layout map based on the channel count */
453  if ((tag & 0xFFFF) != channels)
454  return 0;
455 
456  layout_map = find_layout_map(tag, map);
457  if (layout_map) {
458  int i;
459  for (i = 0; i < channels; i++) {
460  if (av_channel_layout_channel_from_index(ch_layout, i) != layout_map[i].id)
461  break;
462  }
463  if (i == channels)
464  return 1;
465  }
466  return 0;
467 }
468 
469 int ff_mov_get_channel_layout_tag(const AVCodecParameters *par,
470  uint32_t *layout,
471  uint32_t *bitmap,
472  uint32_t **pchannel_desc)
473 {
474  int i;
475  uint32_t tag = 0;
476  const enum MovChannelLayoutTag *layouts = NULL;
477 
478  /* find the layout list for the specified codec */
479  for (i = 0; mov_codec_ch_layouts[i].codec_id != AV_CODEC_ID_NONE; i++) {
480  if (mov_codec_ch_layouts[i].codec_id == par->codec_id)
481  break;
482  }
483  if (mov_codec_ch_layouts[i].codec_id != AV_CODEC_ID_NONE)
484  layouts = mov_codec_ch_layouts[i].layouts;
485 
486  if (layouts) {
487  /* find the layout tag for the specified channel layout */
488  for (i = 0; layouts[i] != 0; i++)
489  if (is_layout_valid_for_tag(&par->ch_layout, layouts[i], mov_ch_layout_map))
490  break;
491 
492  tag = layouts[i];
493  }
494 
495  *layout = tag;
496  *bitmap = 0;
497  *pchannel_desc = NULL;
498 
499  /* if no tag was found, use channel bitmap or description as a backup if possible */
500  if (tag == 0) {
501  uint32_t *channel_desc;
502 
503  if (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) {
504  /* Parsers and encoders (e.g. AC3, AAC, ALAC) indicate/propagate the bitstream's
505  * channel configuration using "standard" layouts in AV_CHANNEL_ORDER_NATIVE but
506  * the encoded bitstream's channels are not actually in that order. Don't return
507  * a channel layout bitmap or description using a conflicting channel order, as
508  * some software will incorrectly override the bitstream-provided information
509  * using the chan atom's data instead (e.g. afinfo/afplay for AAC in MOV) */
510  if (layouts != mov_ch_layouts_wav) {
511  *layout = MOV_CH_LAYOUT_UNKNOWN;
512  return 0;
513  }
514 
515  if (par->ch_layout.u.mask < 0x40000) {
516  *layout = MOV_CH_LAYOUT_USE_BITMAP;
517  *bitmap = (uint32_t)par->ch_layout.u.mask;
518  return 0;
519  }
520  } else if (par->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
521  return AVERROR(ENOSYS);
522 
523  channel_desc = av_malloc_array(par->ch_layout.nb_channels, sizeof(*channel_desc));
524  if (!channel_desc)
525  return AVERROR(ENOMEM);
526 
527  for (i = 0; i < par->ch_layout.nb_channels; i++) {
528  channel_desc[i] =
529  mov_get_channel_label(av_channel_layout_channel_from_index(&par->ch_layout, i));
530 
531  if (channel_desc[i] == 0) {
532  av_free(channel_desc);
533  return AVERROR(ENOSYS);
534  }
535  }
536 
537  *pchannel_desc = channel_desc;
538  }
539 
540  return 0;
541 }
542 
543 int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st,
544  int64_t size)
545 {
546  uint32_t layout_tag, bitmap, num_descr;
547  int ret;
548  AVChannelLayout *ch_layout = &st->codecpar->ch_layout;
549 
550  if (size < 12)
551  return AVERROR_INVALIDDATA;
552 
553  layout_tag = avio_rb32(pb);
554  bitmap = avio_rb32(pb);
555  num_descr = avio_rb32(pb);
556 
557  av_log(s, AV_LOG_DEBUG, "chan: layout=%"PRIu32" "
558  "bitmap=%"PRIu32" num_descr=%"PRIu32"\n",
559  layout_tag, bitmap, num_descr);
560 
561  if (size < 12ULL + num_descr * 20ULL)
562  return 0;
563 
564  if (layout_tag == MOV_CH_LAYOUT_USE_DESCRIPTIONS) {
565  int nb_channels = ch_layout->nb_channels;
566 
567  if (!num_descr || num_descr < nb_channels) {
568  av_log(s, AV_LOG_ERROR, "got %"PRIu32" channel descriptions when at least %d were needed\n",
569  num_descr, nb_channels);
570  return AVERROR_INVALIDDATA;
571  }
572 
573  if (num_descr > nb_channels) {
574  int strict = s->strict_std_compliance >= FF_COMPLIANCE_STRICT;
575  av_log(s, strict ? AV_LOG_ERROR : AV_LOG_WARNING,
576  "got %"PRIu32" channel descriptions when number of channels is %d\n",
577  num_descr, nb_channels);
578  if (strict)
579  return AVERROR_INVALIDDATA;
580  av_log(s, AV_LOG_WARNING, "capping channel descriptions to the number of channels\n");
581  num_descr = nb_channels;
582  }
583 
584  av_channel_layout_uninit(ch_layout);
585  ret = av_channel_layout_custom_init(ch_layout, nb_channels);
586  if (ret < 0)
587  goto out;
588 
589  for (int i = 0; i < num_descr; i++) {
590  uint32_t label;
591  if (pb->eof_reached) {
592  av_log(s, AV_LOG_ERROR,
593  "reached EOF while reading channel layout\n");
594  return AVERROR_INVALIDDATA;
595  }
596  label = avio_rb32(pb); // mChannelLabel
597  avio_rb32(pb); // mChannelFlags
598  avio_rl32(pb); // mCoordinates[0]
599  avio_rl32(pb); // mCoordinates[1]
600  avio_rl32(pb); // mCoordinates[2]
601  size -= 20;
602  ch_layout->u.map[i].id = mov_get_channel_id(label);
603  }
604 
605  ret = av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL);
606  if (ret < 0)
607  goto out;
608  } else if (layout_tag == MOV_CH_LAYOUT_USE_BITMAP) {
609  if (!ch_layout->nb_channels || av_popcount(bitmap) == ch_layout->nb_channels) {
610  if (bitmap < 0x40000) {
611  av_channel_layout_uninit(ch_layout);
612  av_channel_layout_from_mask(ch_layout, bitmap);
613  }
614  } else {
615  av_log(s, AV_LOG_WARNING, "ignoring channel layout bitmap with %d channels because number of channels is %d\n",
616  av_popcount64(bitmap), ch_layout->nb_channels);
617  }
618  } else if (layout_tag & 0xFFFF) {
619  int nb_channels = layout_tag & 0xFFFF;
620  if (!ch_layout->nb_channels)
621  ch_layout->nb_channels = nb_channels;
622  if (nb_channels == ch_layout->nb_channels) {
623  ret = mov_get_channel_layout(ch_layout, layout_tag, 0, mov_ch_layout_map);
624  if (ret < 0)
625  return ret;
626  } else {
627  av_log(s, AV_LOG_WARNING, "ignoring layout tag with %d channels because number of channels is %d\n",
628  nb_channels, ch_layout->nb_channels);
629  }
630  }
631  ret = 0;
632 
633 out:
634  avio_skip(pb, size - 12);
635 
636  return ret;
637 }
638 
639 /* ISO/IEC 23001-8, table 8 */
640 static const enum AVChannel iso_channel_position[] = {
641  [0] = AV_CHAN_FRONT_LEFT, // left front
642  [1] = AV_CHAN_FRONT_RIGHT, // right front
643  [2] = AV_CHAN_FRONT_CENTER, // centre front
644  [3] = AV_CHAN_LOW_FREQUENCY, // low frequency enhancement
645  [4] = AV_CHAN_SIDE_LEFT, // left surround
646  [5] = AV_CHAN_SIDE_RIGHT, // right surround
647  [6] = AV_CHAN_FRONT_LEFT_OF_CENTER, // left front centre
648  [7] = AV_CHAN_FRONT_RIGHT_OF_CENTER, // right front centre
649  [8] = AV_CHAN_BACK_LEFT, // rear surround left
650  [9] = AV_CHAN_BACK_RIGHT, // rear surround right
651  [10] = AV_CHAN_BACK_CENTER, // rear centre
652  [11] = AV_CHAN_SURROUND_DIRECT_LEFT, // left surround direct
653  [12] = AV_CHAN_SURROUND_DIRECT_RIGHT, // right surround direct
654  [13] = AV_CHAN_SIDE_SURROUND_LEFT, // left side surround
655  [14] = AV_CHAN_SIDE_SURROUND_RIGHT, // right side surround
656  [15] = AV_CHAN_WIDE_LEFT, // left wide front
657  [16] = AV_CHAN_WIDE_RIGHT, // right wide front
658  [17] = AV_CHAN_TOP_FRONT_LEFT, // left front vertical height
659  [18] = AV_CHAN_TOP_FRONT_RIGHT, // right front vertical height
660  [19] = AV_CHAN_TOP_FRONT_CENTER, // centre front vertical height
661  [20] = AV_CHAN_TOP_BACK_LEFT, // left surround vertical height rear
662  [21] = AV_CHAN_TOP_BACK_RIGHT, // right surround vertical height rear
663  [22] = AV_CHAN_TOP_BACK_CENTER, // centre vertical height rear
664  [23] = AV_CHAN_TOP_SIDE_LEFT, // left vertical height side surround
665  [24] = AV_CHAN_TOP_SIDE_RIGHT, // right vertical height side surround
666  [25] = AV_CHAN_TOP_CENTER, // top centre surround
667  [26] = AV_CHAN_LOW_FREQUENCY_2, // low frequency enhancement 2
668  [27] = AV_CHAN_BOTTOM_FRONT_LEFT, // left front vertical bottom
669  [28] = AV_CHAN_BOTTOM_FRONT_RIGHT, // right front vertical bottom
670  [29] = AV_CHAN_BOTTOM_FRONT_CENTER, // centre front vertical bottom
671  [30] = AV_CHAN_TOP_SURROUND_LEFT, // left vertical height surround
672  [31] = AV_CHAN_TOP_SURROUND_RIGHT, // right vertical height surround
673 
674  [32] = AV_CHAN_NONE, // reserved
675  [33] = AV_CHAN_NONE, // reserved
676  [34] = AV_CHAN_NONE, // reserved
677  [35] = AV_CHAN_NONE, // reserved
678 
679  [36] = AV_CHAN_NONE, // low frequency enhancement 3
680  [37] = AV_CHAN_NONE, // left edge of screen
681  [38] = AV_CHAN_NONE, // right edge of screen
682  [39] = AV_CHAN_NONE, // half-way between centre of screen and left edge of screen
683  [40] = AV_CHAN_NONE, // half-way between centre of screen and right edge of screen
684  [41] = AV_CHAN_NONE, // left back surround
685  [42] = AV_CHAN_NONE, // right back surround
686 
687  // 43 - 125: reserved
688  // 126: explicit position
689  // 127: unknown /undefined
690 };
691 
692 int ff_mov_get_channel_config_from_layout(const AVChannelLayout *layout, int *config)
693 {
694  // Set default value which means any setup in 23001-8
695  *config = 0;
696  for (int i = 0; iso_ch_layout_map[i].tag & 0xffff; i += 1 + (iso_ch_layout_map[i].tag & 0xffff)) {
697  if (is_layout_valid_for_tag(layout, iso_ch_layout_map[i].tag, &iso_ch_layout_map[i])) {
698  *config = iso_ch_layout_map[i].tag >> 16;
699  break;
700  }
701  }
702 
703  return 0;
704 }
705 
706 /**
707  * Get AVChannelLayout from ISO/IEC 23001-8 ChannelConfiguration.
708  *
709  * @return 1 if the config was unknown, layout is untouched in this case
710  * 0 if the config was found
711  * <0 on error
712  */
713 static int mov_get_channel_layout_from_config(int config, AVChannelLayout *layout, uint64_t omitted_channel_map)
714 {
715  if (config > 0) {
716  uint32_t layout_tag;
717  int nb_omitted_channels = av_popcount64(omitted_channel_map);
718 
719  if (layout->nb_channels <= 0 || layout->nb_channels > UINT16_MAX - nb_omitted_channels)
720  return AVERROR_INVALIDDATA;
721 
722  layout_tag = (config << 16) | (layout->nb_channels + nb_omitted_channels);
723  return mov_get_channel_layout(layout, layout_tag, omitted_channel_map, iso_ch_layout_map);
724  }
725  return 1;
726 }
727 
728 int ff_mov_get_channel_positions_from_layout(const AVChannelLayout *layout,
729  uint8_t *position, int position_num)
730 {
731  enum AVChannel channel;
732 
733  if (position_num < layout->nb_channels)
734  return AVERROR(EINVAL);
735 
736  for (int i = 0; i < layout->nb_channels; i++) {
737  position[i] = 127;
738  channel = av_channel_layout_channel_from_index(layout, i);
739  if (channel == AV_CHAN_NONE)
740  return AVERROR(EINVAL);
741 
742  for (int j = 0; j < FF_ARRAY_ELEMS(iso_channel_position); j++) {
743  if (iso_channel_position[j] == channel) {
744  position[i] = j;
745  break;
746  }
747  }
748  if (position[i] == 127)
749  return AVERROR(EINVAL);
750  }
751 
752  return 0;
753 }
754 
755 int ff_mov_read_chnl(AVFormatContext *s, AVIOContext *pb, AVStream *st)
756 {
757  int stream_structure = avio_r8(pb);
758  int ret;
759 
760  // stream carries channels
761  if (stream_structure & 1) {
762  int layout = avio_r8(pb);
763 
764  av_log(s, AV_LOG_TRACE, "'chnl' layout %d\n", layout);
765  if (!layout) {
766  AVChannelLayout *ch_layout = &st->codecpar->ch_layout;
767  int nb_channels = ch_layout->nb_channels;
768 
769  av_channel_layout_uninit(ch_layout);
770  ret = av_channel_layout_custom_init(ch_layout, nb_channels);
771  if (ret < 0)
772  return ret;
773 
774  for (int i = 0; i < nb_channels; i++) {
775  int speaker_pos = avio_r8(pb);
776  enum AVChannel channel;
777 
778  if (speaker_pos == 126) // explicit position
779  avio_skip(pb, 3); // azimuth, elevation
780 
781  if (speaker_pos >= FF_ARRAY_ELEMS(iso_channel_position))
782  channel = AV_CHAN_NONE;
783  else
784  channel = iso_channel_position[speaker_pos];
785 
786  if (channel == AV_CHAN_NONE) {
787  av_log(s, AV_LOG_WARNING, "speaker position %d is not implemented\n", speaker_pos);
788  channel = AV_CHAN_UNKNOWN;
789  }
790 
791  ch_layout->u.map[i].id = channel;
792  }
793 
794  ret = av_channel_layout_retype(ch_layout, 0, AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL);
795  if (ret < 0)
796  return ret;
797  } else {
798  uint64_t omitted_channel_map = avio_rb64(pb);
799  ret = mov_get_channel_layout_from_config(layout, &st->codecpar->ch_layout, omitted_channel_map);
800  if (ret < 0)
801  return ret;
802  }
803  }
804 
805  // stream carries objects
806  if (stream_structure & 2) {
807  int obj_count = avio_r8(pb);
808  av_log(s, AV_LOG_TRACE, "'chnl' with object_count %d\n", obj_count);
809  }
810 
811  return 0;
812 }
MOV_CH_LAYOUT_QUADRAPHONIC
@ MOV_CH_LAYOUT_QUADRAPHONIC
Definition: mov_chan.h:64
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:339
AV_CODEC_ID_MACE6
@ AV_CODEC_ID_MACE6
Definition: codec_id.h:471
c_Rlt
@ c_Rlt
Definition: mov_chan.c:51
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:216
AV_CODEC_ID_PCM_F32BE
@ AV_CODEC_ID_PCM_F32BE
Definition: codec_id.h:359
AV_CODEC_ID_ADPCM_IMA_QT
@ AV_CODEC_ID_ADPCM_IMA_QT
Definition: codec_id.h:378
iso_R
@ iso_R
Definition: mov_chan.c:80
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:464
AVERROR
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 sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
iso_LFE
@ iso_LFE
Definition: mov_chan.c:82
MOV_CH_LAYOUT_MPEG_5_1_A
@ MOV_CH_LAYOUT_MPEG_5_1_A
Definition: mov_chan.h:77
out
static FILE * out
Definition: movenc.c:55
codec_id
enum AVCodecID codec_id
Definition: mov_chan.c:334
iso_Rss
@ iso_Rss
Definition: mov_chan.c:110
iso_LFE2
@ iso_LFE2
Definition: mov_chan.c:103
mov_codec_ch_layouts
static const struct @488 mov_codec_ch_layouts[]
iso_ch_layout_map
static const struct MovChannelLayoutMap iso_ch_layout_map[]
Definition: mov_chan.c:244
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:49
av_popcount64
#define av_popcount64
Definition: common.h:157
iso_Cs
@ iso_Cs
Definition: mov_chan.c:87
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:335
iso_Rvr
@ iso_Rvr
Definition: mov_chan.c:96
AV_CHAN_WIDE_LEFT
@ AV_CHAN_WIDE_LEFT
Definition: channel_layout.h:72
c_Cs
@ c_Cs
Definition: mov_chan.c:44
MOV_CH_LAYOUT_DTS_8_0_A
@ MOV_CH_LAYOUT_DTS_8_0_A
Definition: mov_chan.h:134
int64_t
long long int64_t
Definition: coverity.c:34
c_Ls
@ c_Ls
Definition: mov_chan.c:45
iso_Cv
@ iso_Cv
Definition: mov_chan.c:92
AVChannelLayout::map
AVChannelCustom * map
This member must be used when the channel order is AV_CHANNEL_ORDER_CUSTOM.
Definition: channel_layout.h:370
AV_CHAN_TOP_SURROUND_LEFT
@ AV_CHAN_TOP_SURROUND_LEFT
+110 degrees, Lvs, TpLS
Definition: channel_layout.h:84
c_X
@ c_X
Definition: mov_chan.c:69
iso_Lss
@ iso_Lss
Definition: mov_chan.c:109
MOV_CH_LAYOUT_AC3_3_0_1
@ MOV_CH_LAYOUT_AC3_3_0_1
Definition: mov_chan.h:107
av_channel_layout_channel_from_index
enum AVChannel av_channel_layout_channel_from_index(const AVChannelLayout *channel_layout, unsigned int idx)
Get the channel with the given index in a channel layout.
Definition: channel_layout.c:674
iso_Lvr
@ iso_Lvr
Definition: mov_chan.c:94
R
#define R
Definition: huffyuv.h:44
AV_CODEC_ID_ALAC
@ AV_CODEC_ID_ALAC
Definition: codec_id.h:477
mov_ch_layout_map
static const struct MovChannelLayoutMap mov_ch_layout_map[]
Definition: mov_chan.c:233
FF_COMPLIANCE_STRICT
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: defs.h:59
CHLIST01
#define CHLIST01(_tag, _1)
Definition: mov_chan.c:125
c_LFE
@ c_LFE
Definition: mov_chan.c:39
MOV_CH_LAYOUT_ITU_2_1
@ MOV_CH_LAYOUT_ITU_2_1
Definition: mov_chan.h:87
AVChannelLayout::u
union AVChannelLayout::@516 u
Details about which channels are present in this layout.
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:324
MOV_CH_LAYOUT_AAC_7_0
@ MOV_CH_LAYOUT_AAC_7_0
Definition: mov_chan.h:100
c_Rc
@ c_Rc
Definition: mov_chan.c:43
AVChannelLayout::mask
uint64_t mask
This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used for AV_CHANNEL_ORDER_AMBISONIC ...
Definition: channel_layout.h:351
av_popcount
#define av_popcount
Definition: common.h:154
CHLIST24
#define CHLIST24(_tag, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24)
Definition: mov_chan.c:140
iso_Lb
@ iso_Lb
Definition: mov_chan.c:107
ff_mov_get_channel_layout_tag
int ff_mov_get_channel_layout_tag(const AVCodecParameters *par, uint32_t *layout, uint32_t *bitmap, uint32_t **pchannel_desc)
Get the channel layout tag for the specified codec id and channel layout.
Definition: mov_chan.c:469
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:329
tf_sess_config.config
config
Definition: tf_sess_config.py:33
MOV_CH_LAYOUT_AC3_3_0
@ MOV_CH_LAYOUT_AC3_3_0
Definition: mov_chan.h:105
iso_Lv
@ iso_Lv
Definition: mov_chan.c:91
MOV_CH_LAYOUT_DTS_6_0_A
@ MOV_CH_LAYOUT_DTS_6_0_A
Definition: mov_chan.h:125
mov_get_channel_layout
static int mov_get_channel_layout(AVChannelLayout *ch_layout, uint32_t tag, uint64_t omitted_channel_map, const struct MovChannelLayoutMap *map)
Get the channel layout for the specified non-special channel layout tag if known.
Definition: mov_chan.c:377
MOV_CH_LAYOUT_MATRIXSTEREO
@ MOV_CH_LAYOUT_MATRIXSTEREO
Definition: mov_chan.h:59
c_LFE2
@ c_LFE2
Definition: mov_chan.c:60
iso_Ts
@ iso_Ts
Definition: mov_chan.c:90
AV_CHAN_SURROUND_DIRECT_LEFT
@ AV_CHAN_SURROUND_DIRECT_LEFT
Definition: channel_layout.h:74
MOV_CH_LAYOUT_MPEG_5_0_A
@ MOV_CH_LAYOUT_MPEG_5_0_A
Definition: mov_chan.h:73
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: codec_id.h:496
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:340
AV_CHAN_TOP_BACK_RIGHT
@ AV_CHAN_TOP_BACK_RIGHT
Definition: channel_layout.h:67
c_Ts
@ c_Ts
Definition: mov_chan.c:47
iso_Rw
@ iso_Rw
Definition: mov_chan.c:100
MOV_CH_LAYOUT_MPEG_5_1_D
@ MOV_CH_LAYOUT_MPEG_5_1_D
Definition: mov_chan.h:80
iso_Rvs
@ iso_Rvs
Definition: mov_chan.c:113
mov_ch_layouts_alac
static enum MovChannelLayoutTag mov_ch_layouts_alac[]
Definition: mov_chan.c:306
iso_Ls
@ iso_Ls
Definition: mov_chan.c:88
mov_get_channel_layout_from_config
static int mov_get_channel_layout_from_config(int config, AVChannelLayout *layout, uint64_t omitted_channel_map)
Get AVChannelLayout from ISO/IEC 23001-8 ChannelConfiguration.
Definition: mov_chan.c:713
MOV_CH_LAYOUT_MONO
@ MOV_CH_LAYOUT_MONO
Definition: mov_chan.h:56
iso_Cvr
@ iso_Cvr
Definition: mov_chan.c:95
AV_CHAN_STEREO_RIGHT
@ AV_CHAN_STEREO_RIGHT
See above.
Definition: channel_layout.h:71
MOV_CH_LAYOUT_ITU_2_2
@ MOV_CH_LAYOUT_ITU_2_2
Definition: mov_chan.h:88
C
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s your new playground is ready Some little details about what s going which in turn will define variables for the build system and the C
Definition: writing_filters.txt:58
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:343
avassert.h
AV_CHAN_BOTTOM_FRONT_LEFT
@ AV_CHAN_BOTTOM_FRONT_LEFT
Definition: channel_layout.h:80
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:764
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:236
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
AV_CODEC_ID_MACE3
@ AV_CODEC_ID_MACE3
Definition: codec_id.h:470
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
MOV_CH_LAYOUT_AC3_1_0_1
@ MOV_CH_LAYOUT_AC3_1_0_1
Definition: mov_chan.h:104
codec_id.h
MOV_CH_LAYOUT_MPEG_5_1_C
@ MOV_CH_LAYOUT_MPEG_5_1_C
Definition: mov_chan.h:79
iso_Rc
@ iso_Rc
Definition: mov_chan.c:86
MOV_CH_LAYOUT_AAC_6_0
@ MOV_CH_LAYOUT_AAC_6_0
Definition: mov_chan.h:98
s
#define s(width, name)
Definition: cbs_vp9.c:198
find_layout_map
static const struct MovChannelLayoutMap * find_layout_map(uint32_t tag, const struct MovChannelLayoutMap *map)
Definition: mov_chan.c:361
iso_Rsr
@ iso_Rsr
Definition: mov_chan.c:84
c_Rls
@ c_Rls
Definition: mov_chan.c:40
AV_CHAN_UNKNOWN
@ AV_CHAN_UNKNOWN
Channel contains data, but its position is unknown.
Definition: channel_layout.h:94
AV_CHANNEL_ORDER_UNSPEC
@ AV_CHANNEL_ORDER_UNSPEC
Only the channel count is specified, without any further information about the channel order.
Definition: channel_layout.h:119
av_channel_layout_from_mask
int av_channel_layout_from_mask(AVChannelLayout *channel_layout, uint64_t mask)
Initialize a native channel layout from a bitmask indicating which channels are present.
Definition: channel_layout.c:253
AV_CHAN_SIDE_RIGHT
@ AV_CHAN_SIDE_RIGHT
Definition: channel_layout.h:60
c_Lt
@ c_Lt
Definition: mov_chan.c:54
MOV_CH_LAYOUT_AC3_3_1
@ MOV_CH_LAYOUT_AC3_3_1
Definition: mov_chan.h:106
CHLIST08
#define CHLIST08(_tag, _1, _2, _3, _4, _5, _6, _7, _8)
Definition: mov_chan.c:132
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:231
c_Rrs
@ c_Rrs
Definition: mov_chan.c:41
channels
channels
Definition: aptx.h:31
c_Rt
@ c_Rt
Definition: mov_chan.c:55
c_HI
@ c_HI
Definition: mov_chan.c:73
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:345
MOV_CH_LAYOUT_MPEG_7_1_B
@ MOV_CH_LAYOUT_MPEG_7_1_B
Definition: mov_chan.h:83
CHLIST04
#define CHLIST04(_tag, _1, _2, _3, _4)
Definition: mov_chan.c:128
AV_CHAN_TOP_SIDE_LEFT
@ AV_CHAN_TOP_SIDE_LEFT
Definition: channel_layout.h:77
AV_CHAN_TOP_SIDE_RIGHT
@ AV_CHAN_TOP_SIDE_RIGHT
Definition: channel_layout.h:78
c_R
@ c_R
Definition: mov_chan.c:37
AVFormatContext
Format I/O context.
Definition: avformat.h:1284
AV_CHAN_SIDE_SURROUND_LEFT
@ AV_CHAN_SIDE_SURROUND_LEFT
+90 degrees, Lss, SiL
Definition: channel_layout.h:82
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:346
MOV_CH_LAYOUT_SMPTE_DTV
@ MOV_CH_LAYOUT_SMPTE_DTV
Definition: mov_chan.h:86
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:770
MovChannelLayoutTag
MovChannelLayoutTag
mov 'chan' tag reading/writing.
Definition: mov_chan.h:51
MOV_CH_LAYOUT_STEREO
@ MOV_CH_LAYOUT_STEREO
Definition: mov_chan.h:57
NULL
#define NULL
Definition: coverity.c:32
c_Lc
@ c_Lc
Definition: mov_chan.c:42
MOV_CH_LAYOUT_DTS_4_1
@ MOV_CH_LAYOUT_DTS_4_1
Definition: mov_chan.h:124
MOV_CH_LAYOUT_MAP
#define MOV_CH_LAYOUT_MAP
Definition: mov_chan.c:145
AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL
#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL
The specified retype target order is ignored and the simplest possible (canonical) order is used for ...
Definition: channel_layout.h:721
AV_CHAN_TOP_BACK_CENTER
@ AV_CHAN_TOP_BACK_CENTER
Definition: channel_layout.h:66
MOV_CH_LAYOUT_UNKNOWN
#define MOV_CH_LAYOUT_UNKNOWN
Definition: mov_chan.h:52
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:911
CHLIST05
#define CHLIST05(_tag, _1, _2, _3, _4, _5)
Definition: mov_chan.c:129
c_Lsd
@ c_Lsd
Definition: mov_chan.c:58
mov_get_channel_id
static enum AVChannel mov_get_channel_id(uint32_t label)
Definition: mov_chan.c:409
AV_CHAN_BOTTOM_FRONT_RIGHT
@ AV_CHAN_BOTTOM_FRONT_RIGHT
Definition: channel_layout.h:81
MOV_CH_LAYOUT_MPEG_3_0_B
@ MOV_CH_LAYOUT_MPEG_3_0_B
Definition: mov_chan.h:70
ff_mov_get_channel_positions_from_layout
int ff_mov_get_channel_positions_from_layout(const AVChannelLayout *layout, uint8_t *position, int position_num)
Get ISO/IEC 23001-8 OutputChannelPosition from AVChannelLayout.
Definition: mov_chan.c:728
AV_CHAN_TOP_CENTER
@ AV_CHAN_TOP_CENTER
Definition: channel_layout.h:61
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
The channel layout and number of channels.
Definition: codec_par.h:207
c_Rsd
@ c_Rsd
Definition: mov_chan.c:59
MovChannelLayoutMap
Definition: mov_chan.c:116
AV_CHAN_FRONT_RIGHT_OF_CENTER
@ AV_CHAN_FRONT_RIGHT_OF_CENTER
Definition: channel_layout.h:57
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
iso_Lvs
@ iso_Lvs
Definition: mov_chan.c:112
AV_CHAN_FRONT_RIGHT
@ AV_CHAN_FRONT_RIGHT
Definition: channel_layout.h:51
AV_CHAN_FRONT_CENTER
@ AV_CHAN_FRONT_CENTER
Definition: channel_layout.h:52
c_Rrt
@ c_Rrt
Definition: mov_chan.c:53
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:463
ff_mov_get_channel_config_from_layout
int ff_mov_get_channel_config_from_layout(const AVChannelLayout *layout, int *config)
Get ISO/IEC 23001-8 ChannelConfiguration from AVChannelLayout.
Definition: mov_chan.c:692
iso_Cb
@ iso_Cb
Definition: mov_chan.c:106
c_LFE1
@ c_LFE1
Definition: mov_chan.c:71
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:733
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:351
c_Rw
@ c_Rw
Definition: mov_chan.c:57
MOV_CH_LAYOUT_AAC_6_1
@ MOV_CH_LAYOUT_AAC_6_1
Definition: mov_chan.h:99
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:319
iso_Lvss
@ iso_Lvss
Definition: mov_chan.c:104
i
#define i(width, name, range_min, range_max)
Definition: cbs_h264.c:63
CHLIST07
#define CHLIST07(_tag, _1, _2, _3, _4, _5, _6, _7)
Definition: mov_chan.c:131
iso_Lsd
@ iso_Lsd
Definition: mov_chan.c:101
iso_Rb
@ iso_Rb
Definition: mov_chan.c:108
AV_CHAN_LOW_FREQUENCY
@ AV_CHAN_LOW_FREQUENCY
Definition: channel_layout.h:53
size
int size
Definition: twinvq_data.h:10344
iso_C
@ iso_C
Definition: mov_chan.c:81
AV_CHAN_BACK_RIGHT
@ AV_CHAN_BACK_RIGHT
Definition: channel_layout.h:55
iso_Lsr
@ iso_Lsr
Definition: mov_chan.c:83
iso_Rvss
@ iso_Rvss
Definition: mov_chan.c:105
c_Y
@ c_Y
Definition: mov_chan.c:67
AV_CHAN_SIDE_LEFT
@ AV_CHAN_SIDE_LEFT
Definition: channel_layout.h:59
MOV_CH_LAYOUT_MPEG_7_1_A
@ MOV_CH_LAYOUT_MPEG_7_1_A
Definition: mov_chan.h:82
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:606
av_channel_layout_retype
int av_channel_layout_retype(AVChannelLayout *channel_layout, enum AVChannelOrder order, int flags)
Change the AVChannelOrder of a channel layout.
Definition: channel_layout.c:887
MOV_CH_LAYOUT_DTS_6_1_A
@ MOV_CH_LAYOUT_DTS_6_1_A
Definition: mov_chan.h:128
MOV_CH_LAYOUT_MPEG_3_0_A
@ MOV_CH_LAYOUT_MPEG_3_0_A
Definition: mov_chan.h:69
AV_CHAN_TOP_FRONT_RIGHT
@ AV_CHAN_TOP_FRONT_RIGHT
Definition: channel_layout.h:64
AV_CHANNEL_ORDER_NATIVE
@ AV_CHANNEL_ORDER_NATIVE
The native channel order, i.e.
Definition: channel_layout.h:125
AV_CHAN_FRONT_LEFT_OF_CENTER
@ AV_CHAN_FRONT_LEFT_OF_CENTER
Definition: channel_layout.h:56
MOV_CH_LAYOUT_DVD_18
@ MOV_CH_LAYOUT_DVD_18
Definition: mov_chan.h:94
AV_CHAN_UNUSED
@ AV_CHAN_UNUSED
Channel is empty can be safely skipped.
Definition: channel_layout.h:91
c_Vhl
@ c_Vhl
Definition: mov_chan.c:48
iso_Lc
@ iso_Lc
Definition: mov_chan.c:85
av_channel_layout_custom_init
int av_channel_layout_custom_init(AVChannelLayout *channel_layout, int nb_channels)
Initialize a custom channel layout with the specified number of channels.
Definition: channel_layout.c:233
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
AVChannel
AVChannel
Definition: channel_layout.h:47
MOV_CH_LAYOUT_MPEG_5_0_D
@ MOV_CH_LAYOUT_MPEG_5_0_D
Definition: mov_chan.h:76
AV_CHAN_TOP_SURROUND_RIGHT
@ AV_CHAN_TOP_SURROUND_RIGHT
-110 degrees, Rvs, TpRS
Definition: channel_layout.h:85
AV_CHAN_SURROUND_DIRECT_RIGHT
@ AV_CHAN_SURROUND_DIRECT_RIGHT
Definition: channel_layout.h:75
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
CHLIST03
#define CHLIST03(_tag, _1, _2, _3)
Definition: mov_chan.c:127
AV_CODEC_ID_PCM_F64BE
@ AV_CODEC_ID_PCM_F64BE
Definition: codec_id.h:361
MOV_CH_LAYOUT_MPEG_6_1_A
@ MOV_CH_LAYOUT_MPEG_6_1_A
Definition: mov_chan.h:81
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:348
CHLIST06
#define CHLIST06(_tag, _1, _2, _3, _4, _5, _6)
Definition: mov_chan.c:130
c_Z
@ c_Z
Definition: mov_chan.c:68
MOV_CH_LAYOUT_AC3_2_1_1
@ MOV_CH_LAYOUT_AC3_2_1_1
Definition: mov_chan.h:108
iso_L
@ iso_L
Definition: mov_chan.c:79
AV_CHAN_STEREO_LEFT
@ AV_CHAN_STEREO_LEFT
Stereo downmix.
Definition: channel_layout.h:69
MOV_CH_LAYOUT_MPEG_4_0_B
@ MOV_CH_LAYOUT_MPEG_4_0_B
Definition: mov_chan.h:72
MovChannelLayoutMap::tag
uint32_t tag
Definition: mov_chan.c:118
MOV_CH_LAYOUT_MPEG_5_0_C
@ MOV_CH_LAYOUT_MPEG_5_0_C
Definition: mov_chan.h:75
mov_chan.h
tag
uint32_t tag
Definition: movenc.c:2054
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:747
MOV_CH_LAYOUT_DVD_4
@ MOV_CH_LAYOUT_DVD_4
Definition: mov_chan.h:89
id
enum AVCodecID id
Definition: dts2pts.c:550
AV_CHAN_BACK_CENTER
@ AV_CHAN_BACK_CENTER
Definition: channel_layout.h:58
AV_CHAN_NONE
@ AV_CHAN_NONE
Invalid channel index.
Definition: channel_layout.h:49
c_Rs
@ c_Rs
Definition: mov_chan.c:46
c_Vhr
@ c_Vhr
Definition: mov_chan.c:50
iso_Rsd
@ iso_Rsd
Definition: mov_chan.c:102
c_Haptic
@ c_Haptic
Definition: mov_chan.c:75
channel_layout.h
c_Csd
@ c_Csd
Definition: mov_chan.c:72
AV_CHAN_LOW_FREQUENCY_2
@ AV_CHAN_LOW_FREQUENCY_2
Definition: channel_layout.h:76
AV_CHAN_TOP_BACK_LEFT
@ AV_CHAN_TOP_BACK_LEFT
Definition: channel_layout.h:65
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:443
AV_CHAN_BACK_LEFT
@ AV_CHAN_BACK_LEFT
Definition: channel_layout.h:54
L
#define L(x)
Definition: vpx_arith.h:36
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:238
iso_Rs
@ iso_Rs
Definition: mov_chan.c:89
MOV_CH_LAYOUT_MPEG_7_1_C
@ MOV_CH_LAYOUT_MPEG_7_1_C
Definition: mov_chan.h:84
AV_CHAN_BOTTOM_FRONT_CENTER
@ AV_CHAN_BOTTOM_FRONT_CENTER
Definition: channel_layout.h:79
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:321
MovChannelLayoutMap::id
enum AVChannel id
Definition: mov_chan.c:119
is_layout_valid_for_tag
static int is_layout_valid_for_tag(const AVChannelLayout *ch_layout, uint32_t tag, const struct MovChannelLayoutMap *map)
Definition: mov_chan.c:447
mov_ch_layouts_aac
static enum MovChannelLayoutTag mov_ch_layouts_aac[]
Definition: mov_chan.c:261
MOV_CH_LAYOUT_AAC_OCTAGONAL
@ MOV_CH_LAYOUT_AAC_OCTAGONAL
Definition: mov_chan.h:101
iso_channel_position
static enum AVChannel iso_channel_position[]
Definition: mov_chan.c:640
AV_CHAN_TOP_FRONT_CENTER
@ AV_CHAN_TOP_FRONT_CENTER
Definition: channel_layout.h:63
AV_CODEC_ID_PCM_S32LE
@ AV_CODEC_ID_PCM_S32LE
Definition: codec_id.h:347
MOV_CH_LAYOUT_DTS_3_1
@ MOV_CH_LAYOUT_DTS_3_1
Definition: mov_chan.h:123
mov_get_channel_label
static uint32_t mov_get_channel_label(enum AVChannel channel)
Definition: mov_chan.c:428
AV_CHAN_SIDE_SURROUND_RIGHT
@ AV_CHAN_SIDE_SURROUND_RIGHT
-90 degrees, Rss, SiR
Definition: channel_layout.h:83
mem.h
AV_CHAN_WIDE_RIGHT
@ AV_CHAN_WIDE_RIGHT
Definition: channel_layout.h:73
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:344
CHLIST02
#define CHLIST02(_tag, _1, _2)
Definition: mov_chan.c:126
map
const VDPAUPixFmtMap * map
Definition: hwcontext_vdpau.c:71
MOV_CH_LAYOUT_AC3_3_1_1
@ MOV_CH_LAYOUT_AC3_3_1_1
Definition: mov_chan.h:109
AV_CODEC_ID_PCM_F64LE
@ AV_CODEC_ID_PCM_F64LE
Definition: codec_id.h:362
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
c_L
@ c_L
Definition: mov_chan.c:36
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:57
c_VI
@ c_VI
Definition: mov_chan.c:74
AV_CHAN_TOP_FRONT_LEFT
@ AV_CHAN_TOP_FRONT_LEFT
Definition: channel_layout.h:62
c_Vhc
@ c_Vhc
Definition: mov_chan.c:49
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:108
ff_mov_read_chnl
int ff_mov_read_chnl(AVFormatContext *s, AVIOContext *pb, AVStream *st)
Read 'chnl' tag from the input stream.
Definition: mov_chan.c:755
AV_CODEC_ID_PCM_F32LE
@ AV_CODEC_ID_PCM_F32LE
Definition: codec_id.h:360
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
iso_Lw
@ iso_Lw
Definition: mov_chan.c:99
c_C
@ c_C
Definition: mov_chan.c:38
AV_CHAN_FRONT_LEFT
@ AV_CHAN_FRONT_LEFT
Definition: channel_layout.h:50
iso_Rv
@ iso_Rv
Definition: mov_chan.c:93
mov_ch_layouts_wav
static enum MovChannelLayoutTag mov_ch_layouts_wav[]
Definition: mov_chan.c:318
c_Lw
@ c_Lw
Definition: mov_chan.c:56
AV_CODEC_ID_PCM_S24BE
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:352
mov_ch_layouts_ac3
static enum MovChannelLayoutTag mov_ch_layouts_ac3[]
Definition: mov_chan.c:288
AVChannelCustom::id
enum AVChannel id
Definition: channel_layout.h:284
channel
channel
Definition: ebur128.h:39
c_W
@ c_W
Definition: mov_chan.c:66
MOV_CH_LAYOUT_USE_BITMAP
@ MOV_CH_LAYOUT_USE_BITMAP
Definition: mov_chan.h:54
MOV_CH_LAYOUT_USE_DESCRIPTIONS
@ MOV_CH_LAYOUT_USE_DESCRIPTIONS
Definition: mov_chan.h:53
ff_mov_read_chan
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size)
Read 'chan' tag from the input stream.
Definition: mov_chan.c:543
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