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1/* Copyright (c) 2017 Google Inc.
2 Written by Andrew Allen */
3/*
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions
6 are met:
7
8 - Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10
11 - Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14
15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*/
27
28/**
29 * @file opus_projection.h
30 * @brief Opus projection reference API
31 */
32
33#ifndef OPUS_PROJECTION_H
34#define OPUS_PROJECTION_H
35
36#include "opus_multistream.h"
37
38#ifdef __cplusplus
39extern "C" {
40#endif
41
42/** @cond OPUS_INTERNAL_DOC */
43
44/** These are the actual encoder and decoder CTL ID numbers.
45 * They should not be used directly by applications.c
46 * In general, SETs should be even and GETs should be odd.*/
47/**@{*/
48#define OPUS_PROJECTION_GET_DEMIXING_MATRIX_GAIN_REQUEST 6001
49#define OPUS_PROJECTION_GET_DEMIXING_MATRIX_SIZE_REQUEST 6003
50#define OPUS_PROJECTION_GET_DEMIXING_MATRIX_REQUEST 6005
51/**@}*/
52
53
54/** @endcond */
55
56/** @defgroup opus_projection_ctls Projection specific encoder and decoder CTLs
57 *
58 * These are convenience macros that are specific to the
59 * opus_projection_encoder_ctl() and opus_projection_decoder_ctl()
60 * interface.
61 * The CTLs from @ref opus_genericctls, @ref opus_encoderctls,
62 * @ref opus_decoderctls, and @ref opus_multistream_ctls may be applied to a
63 * projection encoder or decoder as well.
64 */
65/**@{*/
66
67/** Gets the gain (in dB. S7.8-format) of the demixing matrix from the encoder.
68 * @param[out] x <tt>opus_int32 *</tt>: Returns the gain (in dB. S7.8-format)
69 * of the demixing matrix.
70 * @hideinitializer
71 */
72#define OPUS_PROJECTION_GET_DEMIXING_MATRIX_GAIN(x) OPUS_PROJECTION_GET_DEMIXING_MATRIX_GAIN_REQUEST, __opus_check_int_ptr(x)
73
74
75/** Gets the size in bytes of the demixing matrix from the encoder.
76 * @param[out] x <tt>opus_int32 *</tt>: Returns the size in bytes of the
77 * demixing matrix.
78 * @hideinitializer
79 */
80#define OPUS_PROJECTION_GET_DEMIXING_MATRIX_SIZE(x) OPUS_PROJECTION_GET_DEMIXING_MATRIX_SIZE_REQUEST, __opus_check_int_ptr(x)
81
82
83/** Copies the demixing matrix to the supplied pointer location.
84 * @param[out] x <tt>unsigned char *</tt>: Returns the demixing matrix to the
85 * supplied pointer location.
86 * @param y <tt>opus_int32</tt>: The size in bytes of the reserved memory at the
87 * pointer location.
88 * @hideinitializer
89 */
90#define OPUS_PROJECTION_GET_DEMIXING_MATRIX(x,y) OPUS_PROJECTION_GET_DEMIXING_MATRIX_REQUEST, x, __opus_check_int(y)
91
92
93/**@}*/
94
95/** Opus projection encoder state.
96 * This contains the complete state of a projection Opus encoder.
97 * It is position independent and can be freely copied.
98 * @see opus_projection_ambisonics_encoder_create
99 */
100typedef struct OpusProjectionEncoder OpusProjectionEncoder;
101
102
103/** Opus projection decoder state.
104 * This contains the complete state of a projection Opus decoder.
105 * It is position independent and can be freely copied.
106 * @see opus_projection_decoder_create
107 * @see opus_projection_decoder_init
108 */
109typedef struct OpusProjectionDecoder OpusProjectionDecoder;
110
111
112/**\name Projection encoder functions */
113/**@{*/
114
115/** Gets the size of an OpusProjectionEncoder structure.
116 * @param channels <tt>int</tt>: The total number of input channels to encode.
117 * This must be no more than 255.
118 * @param mapping_family <tt>int</tt>: The mapping family to use for selecting
119 * the appropriate projection.
120 * @returns The size in bytes on success, or a negative error code
121 * (see @ref opus_errorcodes) on error.
122 */
123OPUS_EXPORT OPUS_WARN_UNUSED_RESULT opus_int32 opus_projection_ambisonics_encoder_get_size(
124 int channels,
125 int mapping_family
126);
127
128
129/** Allocates and initializes a projection encoder state.
130 * Call opus_projection_encoder_destroy() to release
131 * this object when finished.
132 * @param Fs <tt>opus_int32</tt>: Sampling rate of the input signal (in Hz).
133 * This must be one of 8000, 12000, 16000,
134 * 24000, or 48000.
135 * @param channels <tt>int</tt>: Number of channels in the input signal.
136 * This must be at most 255.
137 * It may be greater than the number of
138 * coded channels (<code>streams +
139 * coupled_streams</code>).
140 * @param mapping_family <tt>int</tt>: The mapping family to use for selecting
141 * the appropriate projection.
142 * @param[out] streams <tt>int *</tt>: The total number of streams that will
143 * be encoded from the input.
144 * @param[out] coupled_streams <tt>int *</tt>: Number of coupled (2 channel)
145 * streams that will be encoded from the input.
146 * @param application <tt>int</tt>: The target encoder application.
147 * This must be one of the following:
148 * <dl>
149 * <dt>#OPUS_APPLICATION_VOIP</dt>
150 * <dd>Process signal for improved speech intelligibility.</dd>
151 * <dt>#OPUS_APPLICATION_AUDIO</dt>
152 * <dd>Favor faithfulness to the original input.</dd>
153 * <dt>#OPUS_APPLICATION_RESTRICTED_LOWDELAY</dt>
154 * <dd>Configure the minimum possible coding delay by disabling certain modes
155 * of operation.</dd>
156 * </dl>
157 * @param[out] error <tt>int *</tt>: Returns #OPUS_OK on success, or an error
158 * code (see @ref opus_errorcodes) on
159 * failure.
160 */
161OPUS_EXPORT OPUS_WARN_UNUSED_RESULT OpusProjectionEncoder *opus_projection_ambisonics_encoder_create(
162 opus_int32 Fs,
163 int channels,
164 int mapping_family,
165 int *streams,
166 int *coupled_streams,
167 int application,
168 int *error
169) OPUS_ARG_NONNULL(4) OPUS_ARG_NONNULL(5);
170
171
172/** Initialize a previously allocated projection encoder state.
173 * The memory pointed to by \a st must be at least the size returned by
174 * opus_projection_ambisonics_encoder_get_size().
175 * This is intended for applications which use their own allocator instead of
176 * malloc.
177 * To reset a previously initialized state, use the #OPUS_RESET_STATE CTL.
178 * @see opus_projection_ambisonics_encoder_create
179 * @see opus_projection_ambisonics_encoder_get_size
180 * @param st <tt>OpusProjectionEncoder*</tt>: Projection encoder state to initialize.
181 * @param Fs <tt>opus_int32</tt>: Sampling rate of the input signal (in Hz).
182 * This must be one of 8000, 12000, 16000,
183 * 24000, or 48000.
184 * @param channels <tt>int</tt>: Number of channels in the input signal.
185 * This must be at most 255.
186 * It may be greater than the number of
187 * coded channels (<code>streams +
188 * coupled_streams</code>).
189 * @param streams <tt>int</tt>: The total number of streams to encode from the
190 * input.
191 * This must be no more than the number of channels.
192 * @param coupled_streams <tt>int</tt>: Number of coupled (2 channel) streams
193 * to encode.
194 * This must be no larger than the total
195 * number of streams.
196 * Additionally, The total number of
197 * encoded channels (<code>streams +
198 * coupled_streams</code>) must be no
199 * more than the number of input channels.
200 * @param application <tt>int</tt>: The target encoder application.
201 * This must be one of the following:
202 * <dl>
203 * <dt>#OPUS_APPLICATION_VOIP</dt>
204 * <dd>Process signal for improved speech intelligibility.</dd>
205 * <dt>#OPUS_APPLICATION_AUDIO</dt>
206 * <dd>Favor faithfulness to the original input.</dd>
207 * <dt>#OPUS_APPLICATION_RESTRICTED_LOWDELAY</dt>
208 * <dd>Configure the minimum possible coding delay by disabling certain modes
209 * of operation.</dd>
210 * </dl>
211 * @returns #OPUS_OK on success, or an error code (see @ref opus_errorcodes)
212 * on failure.
213 */
214OPUS_EXPORT int opus_projection_ambisonics_encoder_init(
215 OpusProjectionEncoder *st,
216 opus_int32 Fs,
217 int channels,
218 int mapping_family,
219 int *streams,
220 int *coupled_streams,
221 int application
222) OPUS_ARG_NONNULL(1) OPUS_ARG_NONNULL(5) OPUS_ARG_NONNULL(6);
223
224
225/** Encodes a projection Opus frame.
226 * @param st <tt>OpusProjectionEncoder*</tt>: Projection encoder state.
227 * @param[in] pcm <tt>const opus_int16*</tt>: The input signal as interleaved
228 * samples.
229 * This must contain
230 * <code>frame_size*channels</code>
231 * samples.
232 * @param frame_size <tt>int</tt>: Number of samples per channel in the input
233 * signal.
234 * This must be an Opus frame size for the
235 * encoder's sampling rate.
236 * For example, at 48 kHz the permitted values
237 * are 120, 240, 480, 960, 1920, and 2880.
238 * Passing in a duration of less than 10 ms
239 * (480 samples at 48 kHz) will prevent the
240 * encoder from using the LPC or hybrid modes.
241 * @param[out] data <tt>unsigned char*</tt>: Output payload.
242 * This must contain storage for at
243 * least \a max_data_bytes.
244 * @param [in] max_data_bytes <tt>opus_int32</tt>: Size of the allocated
245 * memory for the output
246 * payload. This may be
247 * used to impose an upper limit on
248 * the instant bitrate, but should
249 * not be used as the only bitrate
250 * control. Use #OPUS_SET_BITRATE to
251 * control the bitrate.
252 * @returns The length of the encoded packet (in bytes) on success or a
253 * negative error code (see @ref opus_errorcodes) on failure.
254 */
255OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_projection_encode(
256 OpusProjectionEncoder *st,
257 const opus_int16 *pcm,
258 int frame_size,
259 unsigned char *data,
260 opus_int32 max_data_bytes
261) OPUS_ARG_NONNULL(1) OPUS_ARG_NONNULL(2) OPUS_ARG_NONNULL(4);
262
263
264/** Encodes a projection Opus frame from floating point input.
265 * @param st <tt>OpusProjectionEncoder*</tt>: Projection encoder state.
266 * @param[in] pcm <tt>const float*</tt>: The input signal as interleaved
267 * samples with a normal range of
268 * +/-1.0.
269 * Samples with a range beyond +/-1.0
270 * are supported but will be clipped by
271 * decoders using the integer API and
272 * should only be used if it is known
273 * that the far end supports extended
274 * dynamic range.
275 * This must contain
276 * <code>frame_size*channels</code>
277 * samples.
278 * @param frame_size <tt>int</tt>: Number of samples per channel in the input
279 * signal.
280 * This must be an Opus frame size for the
281 * encoder's sampling rate.
282 * For example, at 48 kHz the permitted values
283 * are 120, 240, 480, 960, 1920, and 2880.
284 * Passing in a duration of less than 10 ms
285 * (480 samples at 48 kHz) will prevent the
286 * encoder from using the LPC or hybrid modes.
287 * @param[out] data <tt>unsigned char*</tt>: Output payload.
288 * This must contain storage for at
289 * least \a max_data_bytes.
290 * @param [in] max_data_bytes <tt>opus_int32</tt>: Size of the allocated
291 * memory for the output
292 * payload. This may be
293 * used to impose an upper limit on
294 * the instant bitrate, but should
295 * not be used as the only bitrate
296 * control. Use #OPUS_SET_BITRATE to
297 * control the bitrate.
298 * @returns The length of the encoded packet (in bytes) on success or a
299 * negative error code (see @ref opus_errorcodes) on failure.
300 */
301OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_projection_encode_float(
302 OpusProjectionEncoder *st,
303 const float *pcm,
304 int frame_size,
305 unsigned char *data,
306 opus_int32 max_data_bytes
307) OPUS_ARG_NONNULL(1) OPUS_ARG_NONNULL(2) OPUS_ARG_NONNULL(4);
308
309
310/** Frees an <code>OpusProjectionEncoder</code> allocated by
311 * opus_projection_ambisonics_encoder_create().
312 * @param st <tt>OpusProjectionEncoder*</tt>: Projection encoder state to be freed.
313 */
314OPUS_EXPORT void opus_projection_encoder_destroy(OpusProjectionEncoder *st);
315
316
317/** Perform a CTL function on a projection Opus encoder.
318 *
319 * Generally the request and subsequent arguments are generated by a
320 * convenience macro.
321 * @param st <tt>OpusProjectionEncoder*</tt>: Projection encoder state.
322 * @param request This and all remaining parameters should be replaced by one
323 * of the convenience macros in @ref opus_genericctls,
324 * @ref opus_encoderctls, @ref opus_multistream_ctls, or
325 * @ref opus_projection_ctls
326 * @see opus_genericctls
327 * @see opus_encoderctls
328 * @see opus_multistream_ctls
329 * @see opus_projection_ctls
330 */
331OPUS_EXPORT int opus_projection_encoder_ctl(OpusProjectionEncoder *st, int request, ...) OPUS_ARG_NONNULL(1);
332
333
334/**@}*/
335
336/**\name Projection decoder functions */
337/**@{*/
338
339/** Gets the size of an <code>OpusProjectionDecoder</code> structure.
340 * @param channels <tt>int</tt>: The total number of output channels.
341 * This must be no more than 255.
342 * @param streams <tt>int</tt>: The total number of streams coded in the
343 * input.
344 * This must be no more than 255.
345 * @param coupled_streams <tt>int</tt>: Number streams to decode as coupled
346 * (2 channel) streams.
347 * This must be no larger than the total
348 * number of streams.
349 * Additionally, The total number of
350 * coded channels (<code>streams +
351 * coupled_streams</code>) must be no
352 * more than 255.
353 * @returns The size in bytes on success, or a negative error code
354 * (see @ref opus_errorcodes) on error.
355 */
356OPUS_EXPORT OPUS_WARN_UNUSED_RESULT opus_int32 opus_projection_decoder_get_size(
357 int channels,
358 int streams,
359 int coupled_streams
360);
361
362
363/** Allocates and initializes a projection decoder state.
364 * Call opus_projection_decoder_destroy() to release
365 * this object when finished.
366 * @param Fs <tt>opus_int32</tt>: Sampling rate to decode at (in Hz).
367 * This must be one of 8000, 12000, 16000,
368 * 24000, or 48000.
369 * @param channels <tt>int</tt>: Number of channels to output.
370 * This must be at most 255.
371 * It may be different from the number of coded
372 * channels (<code>streams +
373 * coupled_streams</code>).
374 * @param streams <tt>int</tt>: The total number of streams coded in the
375 * input.
376 * This must be no more than 255.
377 * @param coupled_streams <tt>int</tt>: Number of streams to decode as coupled
378 * (2 channel) streams.
379 * This must be no larger than the total
380 * number of streams.
381 * Additionally, The total number of
382 * coded channels (<code>streams +
383 * coupled_streams</code>) must be no
384 * more than 255.
385 * @param[in] demixing_matrix <tt>const unsigned char[demixing_matrix_size]</tt>: Demixing matrix
386 * that mapping from coded channels to output channels,
387 * as described in @ref opus_projection and
388 * @ref opus_projection_ctls.
389 * @param demixing_matrix_size <tt>opus_int32</tt>: The size in bytes of the
390 * demixing matrix, as
391 * described in @ref
392 * opus_projection_ctls.
393 * @param[out] error <tt>int *</tt>: Returns #OPUS_OK on success, or an error
394 * code (see @ref opus_errorcodes) on
395 * failure.
396 */
397OPUS_EXPORT OPUS_WARN_UNUSED_RESULT OpusProjectionDecoder *opus_projection_decoder_create(
398 opus_int32 Fs,
399 int channels,
400 int streams,
401 int coupled_streams,
402 unsigned char *demixing_matrix,
403 opus_int32 demixing_matrix_size,
404 int *error
405) OPUS_ARG_NONNULL(5);
406
407
408/** Intialize a previously allocated projection decoder state object.
409 * The memory pointed to by \a st must be at least the size returned by
410 * opus_projection_decoder_get_size().
411 * This is intended for applications which use their own allocator instead of
412 * malloc.
413 * To reset a previously initialized state, use the #OPUS_RESET_STATE CTL.
414 * @see opus_projection_decoder_create
415 * @see opus_projection_deocder_get_size
416 * @param st <tt>OpusProjectionDecoder*</tt>: Projection encoder state to initialize.
417 * @param Fs <tt>opus_int32</tt>: Sampling rate to decode at (in Hz).
418 * This must be one of 8000, 12000, 16000,
419 * 24000, or 48000.
420 * @param channels <tt>int</tt>: Number of channels to output.
421 * This must be at most 255.
422 * It may be different from the number of coded
423 * channels (<code>streams +
424 * coupled_streams</code>).
425 * @param streams <tt>int</tt>: The total number of streams coded in the
426 * input.
427 * This must be no more than 255.
428 * @param coupled_streams <tt>int</tt>: Number of streams to decode as coupled
429 * (2 channel) streams.
430 * This must be no larger than the total
431 * number of streams.
432 * Additionally, The total number of
433 * coded channels (<code>streams +
434 * coupled_streams</code>) must be no
435 * more than 255.
436 * @param[in] demixing_matrix <tt>const unsigned char[demixing_matrix_size]</tt>: Demixing matrix
437 * that mapping from coded channels to output channels,
438 * as described in @ref opus_projection and
439 * @ref opus_projection_ctls.
440 * @param demixing_matrix_size <tt>opus_int32</tt>: The size in bytes of the
441 * demixing matrix, as
442 * described in @ref
443 * opus_projection_ctls.
444 * @returns #OPUS_OK on success, or an error code (see @ref opus_errorcodes)
445 * on failure.
446 */
447OPUS_EXPORT int opus_projection_decoder_init(
448 OpusProjectionDecoder *st,
449 opus_int32 Fs,
450 int channels,
451 int streams,
452 int coupled_streams,
453 unsigned char *demixing_matrix,
454 opus_int32 demixing_matrix_size
455) OPUS_ARG_NONNULL(1) OPUS_ARG_NONNULL(6);
456
457
458/** Decode a projection Opus packet.
459 * @param st <tt>OpusProjectionDecoder*</tt>: Projection decoder state.
460 * @param[in] data <tt>const unsigned char*</tt>: Input payload.
461 * Use a <code>NULL</code>
462 * pointer to indicate packet
463 * loss.
464 * @param len <tt>opus_int32</tt>: Number of bytes in payload.
465 * @param[out] pcm <tt>opus_int16*</tt>: Output signal, with interleaved
466 * samples.
467 * This must contain room for
468 * <code>frame_size*channels</code>
469 * samples.
470 * @param frame_size <tt>int</tt>: The number of samples per channel of
471 * available space in \a pcm.
472 * If this is less than the maximum packet duration
473 * (120 ms; 5760 for 48kHz), this function will not be capable
474 * of decoding some packets. In the case of PLC (data==NULL)
475 * or FEC (decode_fec=1), then frame_size needs to be exactly
476 * the duration of audio that is missing, otherwise the
477 * decoder will not be in the optimal state to decode the
478 * next incoming packet. For the PLC and FEC cases, frame_size
479 * <b>must</b> be a multiple of 2.5 ms.
480 * @param decode_fec <tt>int</tt>: Flag (0 or 1) to request that any in-band
481 * forward error correction data be decoded.
482 * If no such data is available, the frame is
483 * decoded as if it were lost.
484 * @returns Number of samples decoded on success or a negative error code
485 * (see @ref opus_errorcodes) on failure.
486 */
487OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_projection_decode(
488 OpusProjectionDecoder *st,
489 const unsigned char *data,
490 opus_int32 len,
491 opus_int16 *pcm,
492 int frame_size,
493 int decode_fec
494) OPUS_ARG_NONNULL(1) OPUS_ARG_NONNULL(4);
495
496
497/** Decode a projection Opus packet with floating point output.
498 * @param st <tt>OpusProjectionDecoder*</tt>: Projection decoder state.
499 * @param[in] data <tt>const unsigned char*</tt>: Input payload.
500 * Use a <code>NULL</code>
501 * pointer to indicate packet
502 * loss.
503 * @param len <tt>opus_int32</tt>: Number of bytes in payload.
504 * @param[out] pcm <tt>opus_int16*</tt>: Output signal, with interleaved
505 * samples.
506 * This must contain room for
507 * <code>frame_size*channels</code>
508 * samples.
509 * @param frame_size <tt>int</tt>: The number of samples per channel of
510 * available space in \a pcm.
511 * If this is less than the maximum packet duration
512 * (120 ms; 5760 for 48kHz), this function will not be capable
513 * of decoding some packets. In the case of PLC (data==NULL)
514 * or FEC (decode_fec=1), then frame_size needs to be exactly
515 * the duration of audio that is missing, otherwise the
516 * decoder will not be in the optimal state to decode the
517 * next incoming packet. For the PLC and FEC cases, frame_size
518 * <b>must</b> be a multiple of 2.5 ms.
519 * @param decode_fec <tt>int</tt>: Flag (0 or 1) to request that any in-band
520 * forward error correction data be decoded.
521 * If no such data is available, the frame is
522 * decoded as if it were lost.
523 * @returns Number of samples decoded on success or a negative error code
524 * (see @ref opus_errorcodes) on failure.
525 */
526OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_projection_decode_float(
527 OpusProjectionDecoder *st,
528 const unsigned char *data,
529 opus_int32 len,
530 float *pcm,
531 int frame_size,
532 int decode_fec
533) OPUS_ARG_NONNULL(1) OPUS_ARG_NONNULL(4);
534
535
536/** Perform a CTL function on a projection Opus decoder.
537 *
538 * Generally the request and subsequent arguments are generated by a
539 * convenience macro.
540 * @param st <tt>OpusProjectionDecoder*</tt>: Projection decoder state.
541 * @param request This and all remaining parameters should be replaced by one
542 * of the convenience macros in @ref opus_genericctls,
543 * @ref opus_decoderctls, @ref opus_multistream_ctls, or
544 * @ref opus_projection_ctls.
545 * @see opus_genericctls
546 * @see opus_decoderctls
547 * @see opus_multistream_ctls
548 * @see opus_projection_ctls
549 */
550OPUS_EXPORT int opus_projection_decoder_ctl(OpusProjectionDecoder *st, int request, ...) OPUS_ARG_NONNULL(1);
551
552
553/** Frees an <code>OpusProjectionDecoder</code> allocated by
554 * opus_projection_decoder_create().
555 * @param st <tt>OpusProjectionDecoder</tt>: Projection decoder state to be freed.
556 */
557OPUS_EXPORT void opus_projection_decoder_destroy(OpusProjectionDecoder *st);
558
559
560/**@}*/
561
562/**@}*/
563
564#ifdef __cplusplus
565}
566#endif
567
568#endif /* OPUS_PROJECTION_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-20 09:26:45 +0000