1/* Copyright (c) 2010-2011 Xiph.Org Foundation, Skype Limited
2 Written by Jean-Marc Valin and Koen Vos */
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_defines.h
30 * @brief Opus reference implementation constants
31 */
32
33#ifndef OPUS_DEFINES_H
34#define OPUS_DEFINES_H
35
36#include "opus_types.h"
37
38#ifdef __cplusplus
39extern "C" {
40#endif
41
42/** @defgroup opus_errorcodes Error codes
43 * @{
44 */
45/** No error @hideinitializer*/
46#define OPUS_OK 0
47/** One or more invalid/out of range arguments @hideinitializer*/
48#define OPUS_BAD_ARG -1
49/** Not enough bytes allocated in the buffer @hideinitializer*/
50#define OPUS_BUFFER_TOO_SMALL -2
51/** An internal error was detected @hideinitializer*/
52#define OPUS_INTERNAL_ERROR -3
53/** The compressed data passed is corrupted @hideinitializer*/
54#define OPUS_INVALID_PACKET -4
55/** Invalid/unsupported request number @hideinitializer*/
56#define OPUS_UNIMPLEMENTED -5
57/** An encoder or decoder structure is invalid or already freed @hideinitializer*/
58#define OPUS_INVALID_STATE -6
59/** Memory allocation has failed @hideinitializer*/
60#define OPUS_ALLOC_FAIL -7
61/**@}*/
62
63/** @cond OPUS_INTERNAL_DOC */
64/**Export control for opus functions */
65
66#ifndef OPUS_EXPORT
67# if defined(_WIN32)
68# if defined(OPUS_BUILD) && defined(DLL_EXPORT)
69# define OPUS_EXPORT __declspec(dllexport)
70# else
71# define OPUS_EXPORT
72# endif
73# elif defined(__GNUC__) && defined(OPUS_BUILD)
74# define OPUS_EXPORT __attribute__ ((visibility ("default")))
75# else
76# define OPUS_EXPORT
77# endif
78#endif
79
80# if !defined(OPUS_GNUC_PREREQ)
81# if defined(__GNUC__)&&defined(__GNUC_MINOR__)
82# define OPUS_GNUC_PREREQ(_maj,_min) \
83 ((__GNUC__<<16)+__GNUC_MINOR__>=((_maj)<<16)+(_min))
84# else
85# define OPUS_GNUC_PREREQ(_maj,_min) 0
86# endif
87# endif
88
89#if (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L) )
90# if OPUS_GNUC_PREREQ(3,0)
91# define OPUS_RESTRICT __restrict__
92# elif (defined(_MSC_VER) && _MSC_VER >= 1400)
93# define OPUS_RESTRICT __restrict
94# else
95# define OPUS_RESTRICT
96# endif
97#else
98# define OPUS_RESTRICT restrict
99#endif
100
101#if (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L) )
102# if OPUS_GNUC_PREREQ(2,7)
103# define OPUS_INLINE __inline__
104# elif (defined(_MSC_VER))
105# define OPUS_INLINE __inline
106# else
107# define OPUS_INLINE
108# endif
109#else
110# define OPUS_INLINE inline
111#endif
112
113/**Warning attributes for opus functions
114 * NONNULL is not used in OPUS_BUILD to avoid the compiler optimizing out
115 * some paranoid null checks. */
116#if defined(__GNUC__) && OPUS_GNUC_PREREQ(3, 4)
117# define OPUS_WARN_UNUSED_RESULT __attribute__ ((__warn_unused_result__))
118#else
119# define OPUS_WARN_UNUSED_RESULT
120#endif
121#if !defined(OPUS_BUILD) && defined(__GNUC__) && OPUS_GNUC_PREREQ(3, 4)
122# define OPUS_ARG_NONNULL(_x) __attribute__ ((__nonnull__(_x)))
123#else
124# define OPUS_ARG_NONNULL(_x)
125#endif
126
127/** These are the actual Encoder CTL ID numbers.
128 * They should not be used directly by applications.
129 * In general, SETs should be even and GETs should be odd.*/
130#define OPUS_SET_APPLICATION_REQUEST 4000
131#define OPUS_GET_APPLICATION_REQUEST 4001
132#define OPUS_SET_BITRATE_REQUEST 4002
133#define OPUS_GET_BITRATE_REQUEST 4003
134#define OPUS_SET_MAX_BANDWIDTH_REQUEST 4004
135#define OPUS_GET_MAX_BANDWIDTH_REQUEST 4005
136#define OPUS_SET_VBR_REQUEST 4006
137#define OPUS_GET_VBR_REQUEST 4007
138#define OPUS_SET_BANDWIDTH_REQUEST 4008
139#define OPUS_GET_BANDWIDTH_REQUEST 4009
140#define OPUS_SET_COMPLEXITY_REQUEST 4010
141#define OPUS_GET_COMPLEXITY_REQUEST 4011
142#define OPUS_SET_INBAND_FEC_REQUEST 4012
143#define OPUS_GET_INBAND_FEC_REQUEST 4013
144#define OPUS_SET_PACKET_LOSS_PERC_REQUEST 4014
145#define OPUS_GET_PACKET_LOSS_PERC_REQUEST 4015
146#define OPUS_SET_DTX_REQUEST 4016
147#define OPUS_GET_DTX_REQUEST 4017
148#define OPUS_SET_VBR_CONSTRAINT_REQUEST 4020
149#define OPUS_GET_VBR_CONSTRAINT_REQUEST 4021
150#define OPUS_SET_FORCE_CHANNELS_REQUEST 4022
151#define OPUS_GET_FORCE_CHANNELS_REQUEST 4023
152#define OPUS_SET_SIGNAL_REQUEST 4024
153#define OPUS_GET_SIGNAL_REQUEST 4025
154#define OPUS_GET_LOOKAHEAD_REQUEST 4027
155/* #define OPUS_RESET_STATE 4028 */
156#define OPUS_GET_SAMPLE_RATE_REQUEST 4029
157#define OPUS_GET_FINAL_RANGE_REQUEST 4031
158#define OPUS_GET_PITCH_REQUEST 4033
159#define OPUS_SET_GAIN_REQUEST 4034
160#define OPUS_GET_GAIN_REQUEST 4045 /* Should have been 4035 */
161#define OPUS_SET_LSB_DEPTH_REQUEST 4036
162#define OPUS_GET_LSB_DEPTH_REQUEST 4037
163#define OPUS_GET_LAST_PACKET_DURATION_REQUEST 4039
164#define OPUS_SET_EXPERT_FRAME_DURATION_REQUEST 4040
165#define OPUS_GET_EXPERT_FRAME_DURATION_REQUEST 4041
166#define OPUS_SET_PREDICTION_DISABLED_REQUEST 4042
167#define OPUS_GET_PREDICTION_DISABLED_REQUEST 4043
168/* Don't use 4045, it's already taken by OPUS_GET_GAIN_REQUEST */
169#define OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST 4046
170#define OPUS_GET_PHASE_INVERSION_DISABLED_REQUEST 4047
171#define OPUS_GET_IN_DTX_REQUEST 4049
172#define OPUS_SET_DRED_DURATION_REQUEST 4050
173#define OPUS_GET_DRED_DURATION_REQUEST 4051
174#define OPUS_SET_DNN_BLOB_REQUEST 4052
175/*#define OPUS_GET_DNN_BLOB_REQUEST 4053 */
176#define OPUS_SET_OSCE_BWE_REQUEST 4054
177#define OPUS_GET_OSCE_BWE_REQUEST 4055
178#define OPUS_SET_QEXT_REQUEST 4056
179#define OPUS_GET_QEXT_REQUEST 4057
180#define OPUS_SET_IGNORE_EXTENSIONS_REQUEST 4058
181#define OPUS_GET_IGNORE_EXTENSIONS_REQUEST 4059
182
183/** Defines for the presence of extended APIs. */
184#define OPUS_HAVE_OPUS_PROJECTION_H
185
186/* Macros to trigger compilation errors when the wrong types are provided to a CTL */
187#define opus_check_int(x) (((void)((x) == (opus_int32)0)), (opus_int32)(x))
188
189#ifdef DISABLE_PTR_CHECK
190/* Disable checks to prevent ubsan from complaining about NULL checks
191 in test_opus_api. */
192#define opus_check_int_ptr(ptr) (ptr)
193#define opus_check_uint_ptr(ptr) (ptr)
194#define opus_check_uint8_ptr(ptr) (ptr)
195#define opus_check_val16_ptr(ptr) (ptr)
196#define opus_check_void_ptr(ptr) (ptr)
197#else
198#define opus_check_int_ptr(ptr) ((ptr) + ((ptr) - (opus_int32*)(ptr)))
199#define opus_check_uint_ptr(ptr) ((ptr) + ((ptr) - (opus_uint32*)(ptr)))
200#define opus_check_uint8_ptr(ptr) ((ptr) + ((ptr) - (opus_uint8*)(ptr)))
201#define opus_check_val16_ptr(ptr) ((ptr) + ((ptr) - (opus_val16*)(ptr)))
202#define opus_check_void_ptr(x) ((void)((void *)0 == (x)), (x))
203#endif
204/** @endcond */
205
206/** @defgroup opus_ctlvalues Pre-defined values for CTL interface
207 * @see opus_genericctls, opus_encoderctls
208 * @{
209 */
210/* Values for the various encoder CTLs */
211#define OPUS_AUTO -1000 /**<Auto/default setting @hideinitializer*/
212#define OPUS_BITRATE_MAX -1 /**<Maximum bitrate @hideinitializer*/
213
214/** Best for most VoIP/videoconference applications where listening quality and intelligibility matter most
215 * @hideinitializer */
216#define OPUS_APPLICATION_VOIP 2048
217/** Best for broadcast/high-fidelity application where the decoded audio should be as close as possible to the input
218 * @hideinitializer */
219#define OPUS_APPLICATION_AUDIO 2049
220/** Only use when lowest-achievable latency is what matters most. Voice-optimized modes cannot be used.
221 * @hideinitializer */
222#define OPUS_APPLICATION_RESTRICTED_LOWDELAY 2051
223/** Experts only: forces SILK encoding; don't allocate CELT state at all. Disables OPUS_SET_APPLICATION. */
224#define OPUS_APPLICATION_RESTRICTED_SILK 2052
225/** Experts only: forces CELT encoding; don't allocate SILK state at all. Disables OPUS_SET_APPLICATION. */
226#define OPUS_APPLICATION_RESTRICTED_CELT 2053
227
228#define OPUS_SIGNAL_VOICE 3001 /**< Signal being encoded is voice */
229#define OPUS_SIGNAL_MUSIC 3002 /**< Signal being encoded is music */
230#define OPUS_BANDWIDTH_NARROWBAND 1101 /**< 4 kHz bandpass @hideinitializer*/
231#define OPUS_BANDWIDTH_MEDIUMBAND 1102 /**< 6 kHz bandpass @hideinitializer*/
232#define OPUS_BANDWIDTH_WIDEBAND 1103 /**< 8 kHz bandpass @hideinitializer*/
233#define OPUS_BANDWIDTH_SUPERWIDEBAND 1104 /**<12 kHz bandpass @hideinitializer*/
234#define OPUS_BANDWIDTH_FULLBAND 1105 /**<20 kHz bandpass @hideinitializer*/
235
236#define OPUS_FRAMESIZE_ARG 5000 /**< Select frame size from the argument (default) */
237#define OPUS_FRAMESIZE_2_5_MS 5001 /**< Use 2.5 ms frames */
238#define OPUS_FRAMESIZE_5_MS 5002 /**< Use 5 ms frames */
239#define OPUS_FRAMESIZE_10_MS 5003 /**< Use 10 ms frames */
240#define OPUS_FRAMESIZE_20_MS 5004 /**< Use 20 ms frames */
241#define OPUS_FRAMESIZE_40_MS 5005 /**< Use 40 ms frames */
242#define OPUS_FRAMESIZE_60_MS 5006 /**< Use 60 ms frames */
243#define OPUS_FRAMESIZE_80_MS 5007 /**< Use 80 ms frames */
244#define OPUS_FRAMESIZE_100_MS 5008 /**< Use 100 ms frames */
245#define OPUS_FRAMESIZE_120_MS 5009 /**< Use 120 ms frames */
246
247/**@}*/
248
249
250/** @defgroup opus_encoderctls Encoder related CTLs
251 *
252 * These are convenience macros for use with the \c opus_encode_ctl
253 * interface. They are used to generate the appropriate series of
254 * arguments for that call, passing the correct type, size and so
255 * on as expected for each particular request.
256 *
257 * Some usage examples:
258 *
259 * @code
260 * int ret;
261 * ret = opus_encoder_ctl(enc_ctx, OPUS_SET_BANDWIDTH(OPUS_AUTO));
262 * if (ret != OPUS_OK) return ret;
263 *
264 * opus_int32 rate;
265 * opus_encoder_ctl(enc_ctx, OPUS_GET_BANDWIDTH(&rate));
266 *
267 * opus_encoder_ctl(enc_ctx, OPUS_RESET_STATE);
268 * @endcode
269 *
270 * @see opus_genericctls, opus_encoder
271 * @{
272 */
273
274/** Configures the encoder's computational complexity.
275 * The supported range is 0-10 inclusive with 10 representing the highest complexity.
276 * @see OPUS_GET_COMPLEXITY
277 * @param[in] x <tt>opus_int32</tt>: Allowed values: 0-10, inclusive.
278 *
279 * @hideinitializer */
280#define OPUS_SET_COMPLEXITY(x) OPUS_SET_COMPLEXITY_REQUEST, opus_check_int(x)
281/** Gets the encoder's complexity configuration.
282 * @see OPUS_SET_COMPLEXITY
283 * @param[out] x <tt>opus_int32 *</tt>: Returns a value in the range 0-10,
284 * inclusive.
285 * @hideinitializer */
286#define OPUS_GET_COMPLEXITY(x) OPUS_GET_COMPLEXITY_REQUEST, opus_check_int_ptr(x)
287
288/** Configures the bitrate in the encoder.
289 * Rates from 500 to 512000 bits per second are meaningful, as well as the
290 * special values #OPUS_AUTO and #OPUS_BITRATE_MAX.
291 * The value #OPUS_BITRATE_MAX can be used to cause the codec to use as much
292 * rate as it can, which is useful for controlling the rate by adjusting the
293 * output buffer size.
294 * @see OPUS_GET_BITRATE
295 * @param[in] x <tt>opus_int32</tt>: Bitrate in bits per second. The default
296 * is determined based on the number of
297 * channels and the input sampling rate.
298 * @hideinitializer */
299#define OPUS_SET_BITRATE(x) OPUS_SET_BITRATE_REQUEST, opus_check_int(x)
300/** Gets the encoder's bitrate configuration.
301 * @see OPUS_SET_BITRATE
302 * @param[out] x <tt>opus_int32 *</tt>: Returns the bitrate in bits per second.
303 * The default is determined based on the
304 * number of channels and the input
305 * sampling rate.
306 * @hideinitializer */
307#define OPUS_GET_BITRATE(x) OPUS_GET_BITRATE_REQUEST, opus_check_int_ptr(x)
308
309/** Enables or disables variable bitrate (VBR) in the encoder.
310 * The configured bitrate may not be met exactly because frames must
311 * be an integer number of bytes in length.
312 * @see OPUS_GET_VBR
313 * @see OPUS_SET_VBR_CONSTRAINT
314 * @param[in] x <tt>opus_int32</tt>: Allowed values:
315 * <dl>
316 * <dt>0</dt><dd>Hard CBR. For LPC/hybrid modes at very low bit-rate, this can
317 * cause noticeable quality degradation.</dd>
318 * <dt>1</dt><dd>VBR (default). The exact type of VBR is controlled by
319 * #OPUS_SET_VBR_CONSTRAINT.</dd>
320 * </dl>
321 * @hideinitializer */
322#define OPUS_SET_VBR(x) OPUS_SET_VBR_REQUEST, opus_check_int(x)
323/** Determine if variable bitrate (VBR) is enabled in the encoder.
324 * @see OPUS_SET_VBR
325 * @see OPUS_GET_VBR_CONSTRAINT
326 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
327 * <dl>
328 * <dt>0</dt><dd>Hard CBR.</dd>
329 * <dt>1</dt><dd>VBR (default). The exact type of VBR may be retrieved via
330 * #OPUS_GET_VBR_CONSTRAINT.</dd>
331 * </dl>
332 * @hideinitializer */
333#define OPUS_GET_VBR(x) OPUS_GET_VBR_REQUEST, opus_check_int_ptr(x)
334
335/** Enables or disables constrained VBR in the encoder.
336 * This setting is ignored when the encoder is in CBR mode.
337 * @warning Only the MDCT mode of Opus currently heeds the constraint.
338 * Speech mode ignores it completely, hybrid mode may fail to obey it
339 * if the LPC layer uses more bitrate than the constraint would have
340 * permitted.
341 * @see OPUS_GET_VBR_CONSTRAINT
342 * @see OPUS_SET_VBR
343 * @param[in] x <tt>opus_int32</tt>: Allowed values:
344 * <dl>
345 * <dt>0</dt><dd>Unconstrained VBR.</dd>
346 * <dt>1</dt><dd>Constrained VBR (default). This creates a maximum of one
347 * frame of buffering delay assuming a transport with a
348 * serialization speed of the nominal bitrate.</dd>
349 * </dl>
350 * @hideinitializer */
351#define OPUS_SET_VBR_CONSTRAINT(x) OPUS_SET_VBR_CONSTRAINT_REQUEST, opus_check_int(x)
352/** Determine if constrained VBR is enabled in the encoder.
353 * @see OPUS_SET_VBR_CONSTRAINT
354 * @see OPUS_GET_VBR
355 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
356 * <dl>
357 * <dt>0</dt><dd>Unconstrained VBR.</dd>
358 * <dt>1</dt><dd>Constrained VBR (default).</dd>
359 * </dl>
360 * @hideinitializer */
361#define OPUS_GET_VBR_CONSTRAINT(x) OPUS_GET_VBR_CONSTRAINT_REQUEST, opus_check_int_ptr(x)
362
363/** Configures mono/stereo forcing in the encoder.
364 * This can force the encoder to produce packets encoded as either mono or
365 * stereo, regardless of the format of the input audio. This is useful when
366 * the caller knows that the input signal is currently a mono source embedded
367 * in a stereo stream.
368 * @see OPUS_GET_FORCE_CHANNELS
369 * @param[in] x <tt>opus_int32</tt>: Allowed values:
370 * <dl>
371 * <dt>#OPUS_AUTO</dt><dd>Not forced (default)</dd>
372 * <dt>1</dt> <dd>Forced mono</dd>
373 * <dt>2</dt> <dd>Forced stereo</dd>
374 * </dl>
375 * @hideinitializer */
376#define OPUS_SET_FORCE_CHANNELS(x) OPUS_SET_FORCE_CHANNELS_REQUEST, opus_check_int(x)
377/** Gets the encoder's forced channel configuration.
378 * @see OPUS_SET_FORCE_CHANNELS
379 * @param[out] x <tt>opus_int32 *</tt>:
380 * <dl>
381 * <dt>#OPUS_AUTO</dt><dd>Not forced (default)</dd>
382 * <dt>1</dt> <dd>Forced mono</dd>
383 * <dt>2</dt> <dd>Forced stereo</dd>
384 * </dl>
385 * @hideinitializer */
386#define OPUS_GET_FORCE_CHANNELS(x) OPUS_GET_FORCE_CHANNELS_REQUEST, opus_check_int_ptr(x)
387
388/** Configures the maximum bandpass that the encoder will select automatically.
389 * Applications should normally use this instead of #OPUS_SET_BANDWIDTH
390 * (leaving that set to the default, #OPUS_AUTO). This allows the
391 * application to set an upper bound based on the type of input it is
392 * providing, but still gives the encoder the freedom to reduce the bandpass
393 * when the bitrate becomes too low, for better overall quality.
394 * @see OPUS_GET_MAX_BANDWIDTH
395 * @param[in] x <tt>opus_int32</tt>: Allowed values:
396 * <dl>
397 * <dt>OPUS_BANDWIDTH_NARROWBAND</dt> <dd>4 kHz passband</dd>
398 * <dt>OPUS_BANDWIDTH_MEDIUMBAND</dt> <dd>6 kHz passband</dd>
399 * <dt>OPUS_BANDWIDTH_WIDEBAND</dt> <dd>8 kHz passband</dd>
400 * <dt>OPUS_BANDWIDTH_SUPERWIDEBAND</dt><dd>12 kHz passband</dd>
401 * <dt>OPUS_BANDWIDTH_FULLBAND</dt> <dd>20 kHz passband (default)</dd>
402 * </dl>
403 * @hideinitializer */
404#define OPUS_SET_MAX_BANDWIDTH(x) OPUS_SET_MAX_BANDWIDTH_REQUEST, opus_check_int(x)
405
406/** Gets the encoder's configured maximum allowed bandpass.
407 * @see OPUS_SET_MAX_BANDWIDTH
408 * @param[out] x <tt>opus_int32 *</tt>: Allowed values:
409 * <dl>
410 * <dt>#OPUS_BANDWIDTH_NARROWBAND</dt> <dd>4 kHz passband</dd>
411 * <dt>#OPUS_BANDWIDTH_MEDIUMBAND</dt> <dd>6 kHz passband</dd>
412 * <dt>#OPUS_BANDWIDTH_WIDEBAND</dt> <dd>8 kHz passband</dd>
413 * <dt>#OPUS_BANDWIDTH_SUPERWIDEBAND</dt><dd>12 kHz passband</dd>
414 * <dt>#OPUS_BANDWIDTH_FULLBAND</dt> <dd>20 kHz passband (default)</dd>
415 * </dl>
416 * @hideinitializer */
417#define OPUS_GET_MAX_BANDWIDTH(x) OPUS_GET_MAX_BANDWIDTH_REQUEST, opus_check_int_ptr(x)
418
419/** Sets the encoder's bandpass to a specific value.
420 * This prevents the encoder from automatically selecting the bandpass based
421 * on the available bitrate. If an application knows the bandpass of the input
422 * audio it is providing, it should normally use #OPUS_SET_MAX_BANDWIDTH
423 * instead, which still gives the encoder the freedom to reduce the bandpass
424 * when the bitrate becomes too low, for better overall quality.
425 * @see OPUS_GET_BANDWIDTH
426 * @param[in] x <tt>opus_int32</tt>: Allowed values:
427 * <dl>
428 * <dt>#OPUS_AUTO</dt> <dd>(default)</dd>
429 * <dt>#OPUS_BANDWIDTH_NARROWBAND</dt> <dd>4 kHz passband</dd>
430 * <dt>#OPUS_BANDWIDTH_MEDIUMBAND</dt> <dd>6 kHz passband</dd>
431 * <dt>#OPUS_BANDWIDTH_WIDEBAND</dt> <dd>8 kHz passband</dd>
432 * <dt>#OPUS_BANDWIDTH_SUPERWIDEBAND</dt><dd>12 kHz passband</dd>
433 * <dt>#OPUS_BANDWIDTH_FULLBAND</dt> <dd>20 kHz passband</dd>
434 * </dl>
435 * @hideinitializer */
436#define OPUS_SET_BANDWIDTH(x) OPUS_SET_BANDWIDTH_REQUEST, opus_check_int(x)
437
438/** Configures the type of signal being encoded.
439 * This is a hint which helps the encoder's mode selection.
440 * @see OPUS_GET_SIGNAL
441 * @param[in] x <tt>opus_int32</tt>: Allowed values:
442 * <dl>
443 * <dt>#OPUS_AUTO</dt> <dd>(default)</dd>
444 * <dt>#OPUS_SIGNAL_VOICE</dt><dd>Bias thresholds towards choosing LPC or Hybrid modes.</dd>
445 * <dt>#OPUS_SIGNAL_MUSIC</dt><dd>Bias thresholds towards choosing MDCT modes.</dd>
446 * </dl>
447 * @hideinitializer */
448#define OPUS_SET_SIGNAL(x) OPUS_SET_SIGNAL_REQUEST, opus_check_int(x)
449/** Gets the encoder's configured signal type.
450 * @see OPUS_SET_SIGNAL
451 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
452 * <dl>
453 * <dt>#OPUS_AUTO</dt> <dd>(default)</dd>
454 * <dt>#OPUS_SIGNAL_VOICE</dt><dd>Bias thresholds towards choosing LPC or Hybrid modes.</dd>
455 * <dt>#OPUS_SIGNAL_MUSIC</dt><dd>Bias thresholds towards choosing MDCT modes.</dd>
456 * </dl>
457 * @hideinitializer */
458#define OPUS_GET_SIGNAL(x) OPUS_GET_SIGNAL_REQUEST, opus_check_int_ptr(x)
459
460
461/** Configures the encoder's intended application.
462 * The initial value is a mandatory argument to the encoder_create function.
463 * @see OPUS_GET_APPLICATION
464 * @param[in] x <tt>opus_int32</tt>: Returns one of the following values:
465 * <dl>
466 * <dt>#OPUS_APPLICATION_VOIP</dt>
467 * <dd>Process signal for improved speech intelligibility.</dd>
468 * <dt>#OPUS_APPLICATION_AUDIO</dt>
469 * <dd>Favor faithfulness to the original input.</dd>
470 * <dt>#OPUS_APPLICATION_RESTRICTED_LOWDELAY</dt>
471 * <dd>Configure the minimum possible coding delay by disabling certain modes
472 * of operation.</dd>
473 * </dl>
474 * @hideinitializer */
475#define OPUS_SET_APPLICATION(x) OPUS_SET_APPLICATION_REQUEST, opus_check_int(x)
476/** Gets the encoder's configured application.
477 * @see OPUS_SET_APPLICATION
478 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
479 * <dl>
480 * <dt>#OPUS_APPLICATION_VOIP</dt>
481 * <dd>Process signal for improved speech intelligibility.</dd>
482 * <dt>#OPUS_APPLICATION_AUDIO</dt>
483 * <dd>Favor faithfulness to the original input.</dd>
484 * <dt>#OPUS_APPLICATION_RESTRICTED_LOWDELAY</dt>
485 * <dd>Configure the minimum possible coding delay by disabling certain modes
486 * of operation.</dd>
487 * </dl>
488 * @hideinitializer */
489#define OPUS_GET_APPLICATION(x) OPUS_GET_APPLICATION_REQUEST, opus_check_int_ptr(x)
490
491/** Gets the total samples of delay added by the entire codec.
492 * This can be queried by the encoder and then the provided number of samples can be
493 * skipped on from the start of the decoder's output to provide time aligned input
494 * and output. From the perspective of a decoding application the real data begins this many
495 * samples late.
496 *
497 * The decoder contribution to this delay is identical for all decoders, but the
498 * encoder portion of the delay may vary from implementation to implementation,
499 * version to version, or even depend on the encoder's initial configuration.
500 * Applications needing delay compensation should call this CTL rather than
501 * hard-coding a value.
502 * @param[out] x <tt>opus_int32 *</tt>: Number of lookahead samples
503 * @hideinitializer */
504#define OPUS_GET_LOOKAHEAD(x) OPUS_GET_LOOKAHEAD_REQUEST, opus_check_int_ptr(x)
505
506/** Configures the encoder's use of inband forward error correction (FEC).
507 * @note This is only applicable to the LPC layer
508 * @see OPUS_GET_INBAND_FEC
509 * @param[in] x <tt>opus_int32</tt>: Allowed values:
510 * <dl>
511 * <dt>0</dt><dd>Disable inband FEC (default).</dd>
512 * <dt>1</dt><dd>Inband FEC enabled. If the packet loss rate is sufficiently high, Opus will automatically switch to SILK even at high rates to enable use of that FEC.</dd>
513 * <dt>2</dt><dd>Inband FEC enabled, but does not necessarily switch to SILK if we have music.</dd>
514 * </dl>
515 * @hideinitializer */
516#define OPUS_SET_INBAND_FEC(x) OPUS_SET_INBAND_FEC_REQUEST, opus_check_int(x)
517/** Gets encoder's configured use of inband forward error correction.
518 * @see OPUS_SET_INBAND_FEC
519 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
520 * <dl>
521 * <dt>0</dt><dd>Inband FEC disabled (default).</dd>
522 * <dt>1</dt><dd>Inband FEC enabled. If the packet loss rate is sufficiently high, Opus will automatically switch to SILK even at high rates to enable use of that FEC.</dd>
523 * <dt>2</dt><dd>Inband FEC enabled, but does not necessarily switch to SILK if we have music.</dd>
524 * </dl>
525 * @hideinitializer */
526#define OPUS_GET_INBAND_FEC(x) OPUS_GET_INBAND_FEC_REQUEST, opus_check_int_ptr(x)
527
528/** Configures the encoder's expected packet loss percentage.
529 * Higher values trigger progressively more loss resistant behavior in the encoder
530 * at the expense of quality at a given bitrate in the absence of packet loss, but
531 * greater quality under loss.
532 * @see OPUS_GET_PACKET_LOSS_PERC
533 * @param[in] x <tt>opus_int32</tt>: Loss percentage in the range 0-100, inclusive (default: 0).
534 * @hideinitializer */
535#define OPUS_SET_PACKET_LOSS_PERC(x) OPUS_SET_PACKET_LOSS_PERC_REQUEST, opus_check_int(x)
536/** Gets the encoder's configured packet loss percentage.
537 * @see OPUS_SET_PACKET_LOSS_PERC
538 * @param[out] x <tt>opus_int32 *</tt>: Returns the configured loss percentage
539 * in the range 0-100, inclusive (default: 0).
540 * @hideinitializer */
541#define OPUS_GET_PACKET_LOSS_PERC(x) OPUS_GET_PACKET_LOSS_PERC_REQUEST, opus_check_int_ptr(x)
542
543/** Configures the encoder's use of discontinuous transmission (DTX).
544 * @note This is only applicable to the LPC layer
545 * @see OPUS_GET_DTX
546 * @param[in] x <tt>opus_int32</tt>: Allowed values:
547 * <dl>
548 * <dt>0</dt><dd>Disable DTX (default).</dd>
549 * <dt>1</dt><dd>Enabled DTX.</dd>
550 * </dl>
551 * @hideinitializer */
552#define OPUS_SET_DTX(x) OPUS_SET_DTX_REQUEST, opus_check_int(x)
553/** Gets encoder's configured use of discontinuous transmission.
554 * @see OPUS_SET_DTX
555 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
556 * <dl>
557 * <dt>0</dt><dd>DTX disabled (default).</dd>
558 * <dt>1</dt><dd>DTX enabled.</dd>
559 * </dl>
560 * @hideinitializer */
561#define OPUS_GET_DTX(x) OPUS_GET_DTX_REQUEST, opus_check_int_ptr(x)
562/** Configures the depth of signal being encoded.
563 *
564 * This is a hint which helps the encoder identify silence and near-silence.
565 * It represents the number of significant bits of linear intensity below
566 * which the signal contains ignorable quantization or other noise.
567 *
568 * For example, OPUS_SET_LSB_DEPTH(14) would be an appropriate setting
569 * for G.711 u-law input. OPUS_SET_LSB_DEPTH(16) would be appropriate
570 * for 16-bit linear pcm input with opus_encode_float().
571 *
572 * When using opus_encode() instead of opus_encode_float(), or when libopus
573 * is compiled for fixed-point, the encoder uses the minimum of the value
574 * set here and the value 16.
575 *
576 * @see OPUS_GET_LSB_DEPTH
577 * @param[in] x <tt>opus_int32</tt>: Input precision in bits, between 8 and 24
578 * (default: 24).
579 * @hideinitializer */
580#define OPUS_SET_LSB_DEPTH(x) OPUS_SET_LSB_DEPTH_REQUEST, opus_check_int(x)
581/** Gets the encoder's configured signal depth.
582 * @see OPUS_SET_LSB_DEPTH
583 * @param[out] x <tt>opus_int32 *</tt>: Input precision in bits, between 8 and
584 * 24 (default: 24).
585 * @hideinitializer */
586#define OPUS_GET_LSB_DEPTH(x) OPUS_GET_LSB_DEPTH_REQUEST, opus_check_int_ptr(x)
587
588/** Configures the encoder's use of variable duration frames.
589 * When variable duration is enabled, the encoder is free to use a shorter frame
590 * size than the one requested in the opus_encode*() call.
591 * It is then the user's responsibility
592 * to verify how much audio was encoded by checking the ToC byte of the encoded
593 * packet. The part of the audio that was not encoded needs to be resent to the
594 * encoder for the next call. Do not use this option unless you <b>really</b>
595 * know what you are doing.
596 * @see OPUS_GET_EXPERT_FRAME_DURATION
597 * @param[in] x <tt>opus_int32</tt>: Allowed values:
598 * <dl>
599 * <dt>OPUS_FRAMESIZE_ARG</dt><dd>Select frame size from the argument (default).</dd>
600 * <dt>OPUS_FRAMESIZE_2_5_MS</dt><dd>Use 2.5 ms frames.</dd>
601 * <dt>OPUS_FRAMESIZE_5_MS</dt><dd>Use 5 ms frames.</dd>
602 * <dt>OPUS_FRAMESIZE_10_MS</dt><dd>Use 10 ms frames.</dd>
603 * <dt>OPUS_FRAMESIZE_20_MS</dt><dd>Use 20 ms frames.</dd>
604 * <dt>OPUS_FRAMESIZE_40_MS</dt><dd>Use 40 ms frames.</dd>
605 * <dt>OPUS_FRAMESIZE_60_MS</dt><dd>Use 60 ms frames.</dd>
606 * <dt>OPUS_FRAMESIZE_80_MS</dt><dd>Use 80 ms frames.</dd>
607 * <dt>OPUS_FRAMESIZE_100_MS</dt><dd>Use 100 ms frames.</dd>
608 * <dt>OPUS_FRAMESIZE_120_MS</dt><dd>Use 120 ms frames.</dd>
609 * </dl>
610 * @hideinitializer */
611#define OPUS_SET_EXPERT_FRAME_DURATION(x) OPUS_SET_EXPERT_FRAME_DURATION_REQUEST, opus_check_int(x)
612/** Gets the encoder's configured use of variable duration frames.
613 * @see OPUS_SET_EXPERT_FRAME_DURATION
614 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
615 * <dl>
616 * <dt>OPUS_FRAMESIZE_ARG</dt><dd>Select frame size from the argument (default).</dd>
617 * <dt>OPUS_FRAMESIZE_2_5_MS</dt><dd>Use 2.5 ms frames.</dd>
618 * <dt>OPUS_FRAMESIZE_5_MS</dt><dd>Use 5 ms frames.</dd>
619 * <dt>OPUS_FRAMESIZE_10_MS</dt><dd>Use 10 ms frames.</dd>
620 * <dt>OPUS_FRAMESIZE_20_MS</dt><dd>Use 20 ms frames.</dd>
621 * <dt>OPUS_FRAMESIZE_40_MS</dt><dd>Use 40 ms frames.</dd>
622 * <dt>OPUS_FRAMESIZE_60_MS</dt><dd>Use 60 ms frames.</dd>
623 * <dt>OPUS_FRAMESIZE_80_MS</dt><dd>Use 80 ms frames.</dd>
624 * <dt>OPUS_FRAMESIZE_100_MS</dt><dd>Use 100 ms frames.</dd>
625 * <dt>OPUS_FRAMESIZE_120_MS</dt><dd>Use 120 ms frames.</dd>
626 * </dl>
627 * @hideinitializer */
628#define OPUS_GET_EXPERT_FRAME_DURATION(x) OPUS_GET_EXPERT_FRAME_DURATION_REQUEST, opus_check_int_ptr(x)
629
630/** If set to 1, disables almost all use of prediction, making frames almost
631 * completely independent. This reduces quality.
632 * @see OPUS_GET_PREDICTION_DISABLED
633 * @param[in] x <tt>opus_int32</tt>: Allowed values:
634 * <dl>
635 * <dt>0</dt><dd>Enable prediction (default).</dd>
636 * <dt>1</dt><dd>Disable prediction.</dd>
637 * </dl>
638 * @hideinitializer */
639#define OPUS_SET_PREDICTION_DISABLED(x) OPUS_SET_PREDICTION_DISABLED_REQUEST, opus_check_int(x)
640/** Gets the encoder's configured prediction status.
641 * @see OPUS_SET_PREDICTION_DISABLED
642 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
643 * <dl>
644 * <dt>0</dt><dd>Prediction enabled (default).</dd>
645 * <dt>1</dt><dd>Prediction disabled.</dd>
646 * </dl>
647 * @hideinitializer */
648#define OPUS_GET_PREDICTION_DISABLED(x) OPUS_GET_PREDICTION_DISABLED_REQUEST, opus_check_int_ptr(x)
649
650/** If non-zero, enables Deep Redundancy (DRED) and use the specified maximum number of 10-ms redundant frames
651 * @hideinitializer */
652#define OPUS_SET_DRED_DURATION(x) OPUS_SET_DRED_DURATION_REQUEST, opus_check_int(x)
653/** Gets the encoder's configured Deep Redundancy (DRED) maximum number of frames.
654 * @hideinitializer */
655#define OPUS_GET_DRED_DURATION(x) OPUS_GET_DRED_DURATION_REQUEST, opus_check_int_ptr(x)
656
657/** Provide external DNN weights from binary object (only when explicitly built without the weights)
658 * @hideinitializer */
659#define OPUS_SET_DNN_BLOB(data, len) OPUS_SET_DNN_BLOB_REQUEST, opus_check_void_ptr(data), opus_check_int(len)
660
661/** If set to 1, enables quality extension (QEXT), otherwise disables it (default). Warning: This will *hurt* audio quality unless operating at
662 a very high bitrate.
663 * @hideinitializer */
664#define OPUS_SET_QEXT(x) OPUS_SET_QEXT_REQUEST, opus_check_int(x)
665/** Gets the encoder's configured quality extension (QEXT).
666 * @hideinitializer */
667#define OPUS_GET_QEXT(x) OPUS_GET_QEXT_REQUEST, opus_check_int_ptr(x)
668
669/**@}*/
670
671/** @defgroup opus_genericctls Generic CTLs
672 *
673 * These macros are used with the \c opus_decoder_ctl and
674 * \c opus_encoder_ctl calls to generate a particular
675 * request.
676 *
677 * When called on an \c OpusDecoder they apply to that
678 * particular decoder instance. When called on an
679 * \c OpusEncoder they apply to the corresponding setting
680 * on that encoder instance, if present.
681 *
682 * Some usage examples:
683 *
684 * @code
685 * int ret;
686 * opus_int32 pitch;
687 * ret = opus_decoder_ctl(dec_ctx, OPUS_GET_PITCH(&pitch));
688 * if (ret == OPUS_OK) return ret;
689 *
690 * opus_encoder_ctl(enc_ctx, OPUS_RESET_STATE);
691 * opus_decoder_ctl(dec_ctx, OPUS_RESET_STATE);
692 *
693 * opus_int32 enc_bw, dec_bw;
694 * opus_encoder_ctl(enc_ctx, OPUS_GET_BANDWIDTH(&enc_bw));
695 * opus_decoder_ctl(dec_ctx, OPUS_GET_BANDWIDTH(&dec_bw));
696 * if (enc_bw != dec_bw) {
697 * printf("packet bandwidth mismatch!\n");
698 * }
699 * @endcode
700 *
701 * @see opus_encoder, opus_decoder_ctl, opus_encoder_ctl, opus_decoderctls, opus_encoderctls
702 * @{
703 */
704
705/** Resets the codec state to be equivalent to a freshly initialized state.
706 * This should be called when switching streams in order to prevent
707 * the back to back decoding from giving different results from
708 * one at a time decoding.
709 * @hideinitializer */
710#define OPUS_RESET_STATE 4028
711
712/** Gets the final state of the codec's entropy coder.
713 * This is used for testing purposes,
714 * The encoder and decoder state should be identical after coding a payload
715 * (assuming no data corruption or software bugs)
716 *
717 * @param[out] x <tt>opus_uint32 *</tt>: Entropy coder state
718 *
719 * @hideinitializer */
720#define OPUS_GET_FINAL_RANGE(x) OPUS_GET_FINAL_RANGE_REQUEST, opus_check_uint_ptr(x)
721
722/** Gets the encoder's configured bandpass or the decoder's last bandpass.
723 * @see OPUS_SET_BANDWIDTH
724 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
725 * <dl>
726 * <dt>#OPUS_AUTO</dt> <dd>(default)</dd>
727 * <dt>#OPUS_BANDWIDTH_NARROWBAND</dt> <dd>4 kHz passband</dd>
728 * <dt>#OPUS_BANDWIDTH_MEDIUMBAND</dt> <dd>6 kHz passband</dd>
729 * <dt>#OPUS_BANDWIDTH_WIDEBAND</dt> <dd>8 kHz passband</dd>
730 * <dt>#OPUS_BANDWIDTH_SUPERWIDEBAND</dt><dd>12 kHz passband</dd>
731 * <dt>#OPUS_BANDWIDTH_FULLBAND</dt> <dd>20 kHz passband</dd>
732 * </dl>
733 * @hideinitializer */
734#define OPUS_GET_BANDWIDTH(x) OPUS_GET_BANDWIDTH_REQUEST, opus_check_int_ptr(x)
735
736/** Gets the sampling rate the encoder or decoder was initialized with.
737 * This simply returns the <code>Fs</code> value passed to opus_encoder_init()
738 * or opus_decoder_init().
739 * @param[out] x <tt>opus_int32 *</tt>: Sampling rate of encoder or decoder.
740 * @hideinitializer
741 */
742#define OPUS_GET_SAMPLE_RATE(x) OPUS_GET_SAMPLE_RATE_REQUEST, opus_check_int_ptr(x)
743
744/** If set to 1, disables the use of phase inversion for intensity stereo,
745 * improving the quality of mono downmixes, but slightly reducing normal
746 * stereo quality. Disabling phase inversion in the decoder does not comply
747 * with RFC 6716, although it does not cause any interoperability issue and
748 * is expected to become part of the Opus standard once RFC 6716 is updated
749 * by draft-ietf-codec-opus-update.
750 * @see OPUS_GET_PHASE_INVERSION_DISABLED
751 * @param[in] x <tt>opus_int32</tt>: Allowed values:
752 * <dl>
753 * <dt>0</dt><dd>Enable phase inversion (default).</dd>
754 * <dt>1</dt><dd>Disable phase inversion.</dd>
755 * </dl>
756 * @hideinitializer */
757#define OPUS_SET_PHASE_INVERSION_DISABLED(x) OPUS_SET_PHASE_INVERSION_DISABLED_REQUEST, opus_check_int(x)
758/** Gets the encoder's configured phase inversion status.
759 * @see OPUS_SET_PHASE_INVERSION_DISABLED
760 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
761 * <dl>
762 * <dt>0</dt><dd>Stereo phase inversion enabled (default).</dd>
763 * <dt>1</dt><dd>Stereo phase inversion disabled.</dd>
764 * </dl>
765 * @hideinitializer */
766#define OPUS_GET_PHASE_INVERSION_DISABLED(x) OPUS_GET_PHASE_INVERSION_DISABLED_REQUEST, opus_check_int_ptr(x)
767/** Gets the DTX state of the encoder.
768 * Returns whether the last encoded frame was either a comfort noise update
769 * during DTX or not encoded because of DTX.
770 * @param[out] x <tt>opus_int32 *</tt>: Returns one of the following values:
771 * <dl>
772 * <dt>0</dt><dd>The encoder is not in DTX.</dd>
773 * <dt>1</dt><dd>The encoder is in DTX.</dd>
774 * </dl>
775 * @hideinitializer */
776#define OPUS_GET_IN_DTX(x) OPUS_GET_IN_DTX_REQUEST, opus_check_int_ptr(x)
777
778/**@}*/
779
780/** @defgroup opus_decoderctls Decoder related CTLs
781 * @see opus_genericctls, opus_encoderctls, opus_decoder
782 * @{
783 */
784
785/** Configures decoder gain adjustment.
786 * Scales the decoded output by a factor specified in Q8 dB units.
787 * This has a maximum range of -32768 to 32767 inclusive, and returns
788 * OPUS_BAD_ARG otherwise. The default is zero indicating no adjustment.
789 * This setting survives decoder reset.
790 *
791 * gain = pow(10, x/(20.0*256))
792 *
793 * @param[in] x <tt>opus_int32</tt>: Amount to scale PCM signal by in Q8 dB units.
794 * @hideinitializer */
795#define OPUS_SET_GAIN(x) OPUS_SET_GAIN_REQUEST, opus_check_int(x)
796/** Gets the decoder's configured gain adjustment. @see OPUS_SET_GAIN
797 *
798 * @param[out] x <tt>opus_int32 *</tt>: Amount to scale PCM signal by in Q8 dB units.
799 * @hideinitializer */
800#define OPUS_GET_GAIN(x) OPUS_GET_GAIN_REQUEST, opus_check_int_ptr(x)
801
802/** Gets the duration (in samples) of the last packet successfully decoded or concealed.
803 * @param[out] x <tt>opus_int32 *</tt>: Number of samples (at current sampling rate).
804 * @hideinitializer */
805#define OPUS_GET_LAST_PACKET_DURATION(x) OPUS_GET_LAST_PACKET_DURATION_REQUEST, opus_check_int_ptr(x)
806
807/** Gets the pitch of the last decoded frame, if available.
808 * This can be used for any post-processing algorithm requiring the use of pitch,
809 * e.g. time stretching/shortening. If the last frame was not voiced, or if the
810 * pitch was not coded in the frame, then zero is returned.
811 *
812 * This CTL is only implemented for decoder instances.
813 *
814 * @param[out] x <tt>opus_int32 *</tt>: pitch period at 48 kHz (or 0 if not available)
815 *
816 * @hideinitializer */
817#define OPUS_GET_PITCH(x) OPUS_GET_PITCH_REQUEST, opus_check_int_ptr(x)
818
819/** Enables blind bandwidth extension for wideband signals if decoding sampling rate is 48 kHz.
820 * @param[in] x <tt>opus_int32 </tt>: 1 enables bandwidth extension, 0 disables it.
821 * The default is 0.
822 *
823 * @hideinitializer */
824 #define OPUS_SET_OSCE_BWE(x) OPUS_SET_OSCE_BWE_REQUEST, opus_check_int(x)
825/** Gets blind bandwidth extension flag for wideband signals if decoding sampling rate is 48 kHz.
826 * @param[out] x <tt>opus_int32 *</tt>: 1 if bwe enabled, 0 if disabled.
827 *
828 * @hideinitializer */
829 #define OPUS_GET_OSCE_BWE(x) OPUS_GET_OSCE_BWE_REQUEST, opus_check_int_ptr(x)
830
831/** If set to 1, the decoder will ignore all extensions found in the padding area
832 * (does not affect DRED, which is decoded separately).
833 * @hideinitializer */
834#define OPUS_SET_IGNORE_EXTENSIONS(x) OPUS_SET_IGNORE_EXTENSIONS_REQUEST, opus_check_int(x)
835/** Gets whether the decoder is ignoring extensions.
836 * @hideinitializer */
837#define OPUS_GET_IGNORE_EXTENSIONS(x) OPUS_GET_IGNORE_EXTENSIONS_REQUEST, opus_check_int_ptr(x)
838
839/**@}*/
840
841/** @defgroup opus_libinfo Opus library information functions
842 * @{
843 */
844
845/** Converts an opus error code into a human readable string.
846 *
847 * @param[in] error <tt>int</tt>: Error number
848 * @returns Error string
849 */
850OPUS_EXPORT const char *opus_strerror(int error);
851
852/** Gets the libopus version string.
853 *
854 * Applications may look for the substring "-fixed" in the version string to
855 * determine whether they have a fixed-point or floating-point build at
856 * runtime.
857 *
858 * @returns Version string
859 */
860OPUS_EXPORT const char *opus_get_version_string(void);
861/**@}*/
862
863#ifdef __cplusplus
864}
865#endif
866
867#endif /* OPUS_DEFINES_H */
868