2 * Copyright (C) 2011 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #ifndef ANDROID_AUDIO_CORE_H
19 #define ANDROID_AUDIO_CORE_H
24 #include <sys/cdefs.h>
25 #include <sys/types.h>
27 #include <cutils/bitops.h>
29 #include "audio-base.h"
33 /* The enums were moved here mostly from
34 * frameworks/base/include/media/AudioSystem.h
37 /* represents an invalid uid for tracks; the calling or client uid is often substituted. */
38 #define AUDIO_UID_INVALID ((uid_t)-1)
40 /* device address used to refer to the standard remote submix */
41 #define AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS "0"
43 /* AudioFlinger and AudioPolicy services use I/O handles to identify audio sources and sinks */
44 typedef int audio_io_handle_t;
46 /* Do not change these values without updating their counterparts
47 * in frameworks/base/media/java/android/media/AudioAttributes.java
50 AUDIO_CONTENT_TYPE_UNKNOWN = 0,
51 AUDIO_CONTENT_TYPE_SPEECH = 1,
52 AUDIO_CONTENT_TYPE_MUSIC = 2,
53 AUDIO_CONTENT_TYPE_MOVIE = 3,
54 AUDIO_CONTENT_TYPE_SONIFICATION = 4,
56 AUDIO_CONTENT_TYPE_CNT,
57 AUDIO_CONTENT_TYPE_MAX = AUDIO_CONTENT_TYPE_CNT - 1,
58 } audio_content_type_t;
60 typedef uint32_t audio_flags_mask_t;
62 /* Do not change these values without updating their counterparts
63 * in frameworks/base/media/java/android/media/AudioAttributes.java
66 AUDIO_FLAG_NONE = 0x0,
67 AUDIO_FLAG_AUDIBILITY_ENFORCED = 0x1,
68 AUDIO_FLAG_SECURE = 0x2,
70 AUDIO_FLAG_BEACON = 0x8,
71 AUDIO_FLAG_HW_AV_SYNC = 0x10,
72 AUDIO_FLAG_HW_HOTWORD = 0x20,
73 AUDIO_FLAG_BYPASS_INTERRUPTION_POLICY = 0x40,
74 AUDIO_FLAG_BYPASS_MUTE = 0x80,
75 AUDIO_FLAG_LOW_LATENCY = 0x100,
76 AUDIO_FLAG_DEEP_BUFFER = 0x200,
79 /* Audio attributes */
80 #define AUDIO_ATTRIBUTES_TAGS_MAX_SIZE 256
82 audio_content_type_t content_type;
84 audio_source_t source;
85 audio_flags_mask_t flags;
86 char tags[AUDIO_ATTRIBUTES_TAGS_MAX_SIZE]; /* UTF8 */
87 } __attribute__((packed)) audio_attributes_t; // sent through Binder;
89 /* a unique ID allocated by AudioFlinger for use as an audio_io_handle_t, audio_session_t,
90 * effect ID (int), audio_module_handle_t, and audio_patch_handle_t.
91 * Audio port IDs (audio_port_handle_t) are allocated by AudioPolicy
92 * in a different namespace than AudioFlinger unique IDs.
94 typedef int audio_unique_id_t;
96 /* Possible uses for an audio_unique_id_t */
98 AUDIO_UNIQUE_ID_USE_UNSPECIFIED = 0,
99 AUDIO_UNIQUE_ID_USE_SESSION = 1, // for allocated sessions, not special AUDIO_SESSION_*
100 AUDIO_UNIQUE_ID_USE_MODULE = 2,
101 AUDIO_UNIQUE_ID_USE_EFFECT = 3,
102 AUDIO_UNIQUE_ID_USE_PATCH = 4,
103 AUDIO_UNIQUE_ID_USE_OUTPUT = 5,
104 AUDIO_UNIQUE_ID_USE_INPUT = 6,
105 AUDIO_UNIQUE_ID_USE_PLAYER = 7,
106 AUDIO_UNIQUE_ID_USE_MAX = 8, // must be a power-of-two
107 AUDIO_UNIQUE_ID_USE_MASK = AUDIO_UNIQUE_ID_USE_MAX - 1
108 } audio_unique_id_use_t;
110 /* Return the use of an audio_unique_id_t */
111 static inline audio_unique_id_use_t audio_unique_id_get_use(audio_unique_id_t id)
113 return (audio_unique_id_use_t) (id & AUDIO_UNIQUE_ID_USE_MASK);
116 /* Reserved audio_unique_id_t values. FIXME: not a complete list. */
117 #define AUDIO_UNIQUE_ID_ALLOCATE AUDIO_SESSION_ALLOCATE
119 /* A channel mask per se only defines the presence or absence of a channel, not the order.
120 * But see AUDIO_INTERLEAVE_* below for the platform convention of order.
122 * audio_channel_mask_t is an opaque type and its internal layout should not
123 * be assumed as it may change in the future.
124 * Instead, always use the functions declared in this header to examine.
126 * These are the current representations:
128 * AUDIO_CHANNEL_REPRESENTATION_POSITION
129 * is a channel mask representation for position assignment.
130 * Each low-order bit corresponds to the spatial position of a transducer (output),
131 * or interpretation of channel (input).
132 * The user of a channel mask needs to know the context of whether it is for output or input.
133 * The constants AUDIO_CHANNEL_OUT_* or AUDIO_CHANNEL_IN_* apply to the bits portion.
134 * It is not permitted for no bits to be set.
136 * AUDIO_CHANNEL_REPRESENTATION_INDEX
137 * is a channel mask representation for index assignment.
138 * Each low-order bit corresponds to a selected channel.
139 * There is no platform interpretation of the various bits.
140 * There is no concept of output or input.
141 * It is not permitted for no bits to be set.
143 * All other representations are reserved for future use.
145 * Warning: current representation distinguishes between input and output, but this will not the be
146 * case in future revisions of the platform. Wherever there is an ambiguity between input and output
147 * that is currently resolved by checking the channel mask, the implementer should look for ways to
148 * fix it with additional information outside of the mask.
150 typedef uint32_t audio_channel_mask_t;
152 /* log(2) of maximum number of representations, not part of public API */
153 #define AUDIO_CHANNEL_REPRESENTATION_LOG2 2
155 /* The return value is undefined if the channel mask is invalid. */
156 static inline uint32_t audio_channel_mask_get_bits(audio_channel_mask_t channel)
158 return channel & ((1 << AUDIO_CHANNEL_COUNT_MAX) - 1);
161 typedef uint32_t audio_channel_representation_t;
163 /* The return value is undefined if the channel mask is invalid. */
164 static inline audio_channel_representation_t audio_channel_mask_get_representation(
165 audio_channel_mask_t channel)
167 // The right shift should be sufficient, but also "and" for safety in case mask is not 32 bits
168 return (audio_channel_representation_t)
169 ((channel >> AUDIO_CHANNEL_COUNT_MAX) & ((1 << AUDIO_CHANNEL_REPRESENTATION_LOG2) - 1));
172 /* Returns true if the channel mask is valid,
173 * or returns false for AUDIO_CHANNEL_NONE, AUDIO_CHANNEL_INVALID, and other invalid values.
174 * This function is unable to determine whether a channel mask for position assignment
175 * is invalid because an output mask has an invalid output bit set,
176 * or because an input mask has an invalid input bit set.
177 * All other APIs that take a channel mask assume that it is valid.
179 static inline bool audio_channel_mask_is_valid(audio_channel_mask_t channel)
181 uint32_t bits = audio_channel_mask_get_bits(channel);
182 audio_channel_representation_t representation = audio_channel_mask_get_representation(channel);
183 switch (representation) {
184 case AUDIO_CHANNEL_REPRESENTATION_POSITION:
185 case AUDIO_CHANNEL_REPRESENTATION_INDEX:
194 /* Not part of public API */
195 static inline audio_channel_mask_t audio_channel_mask_from_representation_and_bits(
196 audio_channel_representation_t representation, uint32_t bits)
198 return (audio_channel_mask_t) ((representation << AUDIO_CHANNEL_COUNT_MAX) | bits);
201 /* This enum is deprecated */
203 AUDIO_IN_ACOUSTICS_NONE = 0,
204 AUDIO_IN_ACOUSTICS_AGC_ENABLE = 0x0001,
205 AUDIO_IN_ACOUSTICS_AGC_DISABLE = 0,
206 AUDIO_IN_ACOUSTICS_NS_ENABLE = 0x0002,
207 AUDIO_IN_ACOUSTICS_NS_DISABLE = 0,
208 AUDIO_IN_ACOUSTICS_TX_IIR_ENABLE = 0x0004,
209 AUDIO_IN_ACOUSTICS_TX_DISABLE = 0,
210 } audio_in_acoustics_t;
212 typedef uint32_t audio_devices_t;
214 * Stub audio output device. Used in policy configuration file on platforms without audio outputs.
215 * This alias value to AUDIO_DEVICE_OUT_DEFAULT is only used in the audio policy context.
217 #define AUDIO_DEVICE_OUT_STUB AUDIO_DEVICE_OUT_DEFAULT
219 * Stub audio input device. Used in policy configuration file on platforms without audio inputs.
220 * This alias value to AUDIO_DEVICE_IN_DEFAULT is only used in the audio policy context.
222 #define AUDIO_DEVICE_IN_STUB AUDIO_DEVICE_IN_DEFAULT
224 /* Additional information about compressed streams offloaded to
226 * The version and size fields must be initialized by the caller by using
227 * one of the constants defined here.
228 * Must be aligned to transmit as raw memory through Binder.
231 uint16_t version; // version of the info structure
232 uint16_t size; // total size of the structure including version and size
233 uint32_t sample_rate; // sample rate in Hz
234 audio_channel_mask_t channel_mask; // channel mask
235 audio_format_t format; // audio format
236 audio_stream_type_t stream_type; // stream type
237 uint32_t bit_rate; // bit rate in bits per second
238 int64_t duration_us; // duration in microseconds, -1 if unknown
239 bool has_video; // true if stream is tied to a video stream
240 bool is_streaming; // true if streaming, false if local playback
242 uint32_t offload_buffer_size; // offload fragment size
244 } __attribute__((aligned(8))) audio_offload_info_t;
246 #define AUDIO_MAKE_OFFLOAD_INFO_VERSION(maj,min) \
247 ((((maj) & 0xff) << 8) | ((min) & 0xff))
249 #define AUDIO_OFFLOAD_INFO_VERSION_0_1 AUDIO_MAKE_OFFLOAD_INFO_VERSION(0, 1)
250 #define AUDIO_OFFLOAD_INFO_VERSION_CURRENT AUDIO_OFFLOAD_INFO_VERSION_0_1
252 static const audio_offload_info_t AUDIO_INFO_INITIALIZER = {
253 /* .version = */ AUDIO_OFFLOAD_INFO_VERSION_CURRENT,
254 /* .size = */ sizeof(audio_offload_info_t),
255 /* .sample_rate = */ 0,
256 /* .channel_mask = */ 0,
257 /* .format = */ AUDIO_FORMAT_DEFAULT,
258 /* .stream_type = */ AUDIO_STREAM_VOICE_CALL,
260 /* .duration_us = */ 0,
261 /* .has_video = */ false,
262 /* .is_streaming = */ false,
263 /* .bit_width = */ 16,
264 /* .offload_buffer_size = */ 0,
265 /* .usage = */ AUDIO_USAGE_UNKNOWN
268 /* common audio stream configuration parameters
269 * You should memset() the entire structure to zero before use to
270 * ensure forward compatibility
271 * Must be aligned to transmit as raw memory through Binder.
273 struct __attribute__((aligned(8))) audio_config {
274 uint32_t sample_rate;
275 audio_channel_mask_t channel_mask;
276 audio_format_t format;
277 audio_offload_info_t offload_info;
278 uint32_t frame_count;
280 typedef struct audio_config audio_config_t;
282 static const audio_config_t AUDIO_CONFIG_INITIALIZER = {
283 /* .sample_rate = */ 0,
284 /* .channel_mask = */ AUDIO_CHANNEL_NONE,
285 /* .format = */ AUDIO_FORMAT_DEFAULT,
286 /* .offload_info = */ {
287 /* .version = */ AUDIO_OFFLOAD_INFO_VERSION_CURRENT,
288 /* .size = */ sizeof(audio_offload_info_t),
289 /* .sample_rate = */ 0,
290 /* .channel_mask = */ 0,
291 /* .format = */ AUDIO_FORMAT_DEFAULT,
292 /* .stream_type = */ AUDIO_STREAM_VOICE_CALL,
294 /* .duration_us = */ 0,
295 /* .has_video = */ false,
296 /* .is_streaming = */ false,
297 /* .bit_width = */ 16,
298 /* .offload_buffer_size = */ 0,
299 /* .usage = */ AUDIO_USAGE_UNKNOWN
301 /* .frame_count = */ 0,
304 struct audio_config_base {
305 uint32_t sample_rate;
306 audio_channel_mask_t channel_mask;
307 audio_format_t format;
310 typedef struct audio_config_base audio_config_base_t;
312 static const audio_config_base_t AUDIO_CONFIG_BASE_INITIALIZER = {
313 /* .sample_rate = */ 0,
314 /* .channel_mask = */ AUDIO_CHANNEL_NONE,
315 /* .format = */ AUDIO_FORMAT_DEFAULT
318 /* audio hw module handle functions or structures referencing a module */
319 typedef int audio_module_handle_t;
321 /******************************
323 *****************************/
325 /** 3 dB headroom are allowed on float samples (3db = 10^(3/20) = 1.412538).
326 * See: https://developer.android.com/reference/android/media/AudioTrack.html#write(float[], int, int, int)
328 #define FLOAT_NOMINAL_RANGE_HEADROOM 1.412538
330 /* If the audio hardware supports gain control on some audio paths,
331 * the platform can expose them in the audio_policy.conf file. The audio HAL
332 * will then implement gain control functions that will use the following data
335 typedef uint32_t audio_gain_mode_t;
338 /* An audio_gain struct is a representation of a gain stage.
339 * A gain stage is always attached to an audio port. */
341 audio_gain_mode_t mode; /* e.g. AUDIO_GAIN_MODE_JOINT */
342 audio_channel_mask_t channel_mask; /* channels which gain an be controlled.
343 N/A if AUDIO_GAIN_MODE_CHANNELS is not supported */
344 int min_value; /* minimum gain value in millibels */
345 int max_value; /* maximum gain value in millibels */
346 int default_value; /* default gain value in millibels */
347 unsigned int step_value; /* gain step in millibels */
348 unsigned int min_ramp_ms; /* minimum ramp duration in ms */
349 unsigned int max_ramp_ms; /* maximum ramp duration in ms */
352 /* The gain configuration structure is used to get or set the gain values of a
354 struct audio_gain_config {
355 int index; /* index of the corresponding audio_gain in the
356 audio_port gains[] table */
357 audio_gain_mode_t mode; /* mode requested for this command */
358 audio_channel_mask_t channel_mask; /* channels which gain value follows.
361 // note this "8" is not FCC_8, so it won't need to be changed for > 8 channels
362 int values[sizeof(audio_channel_mask_t) * 8]; /* gain values in millibels
363 for each channel ordered from LSb to MSb in
364 channel mask. The number of values is 1 in joint
365 mode or popcount(channel_mask) */
366 unsigned int ramp_duration_ms; /* ramp duration in ms */
369 /******************************
371 *****************************/
373 /* Types defined here are used to describe an audio source or sink at internal
374 * framework interfaces (audio policy, patch panel) or at the audio HAL.
375 * Sink and sources are grouped in a concept of “audio port” representing an
376 * audio end point at the edge of the system managed by the module exposing
379 /* Each port has a unique ID or handle allocated by policy manager */
380 typedef int audio_port_handle_t;
382 /* the maximum length for the human-readable device name */
383 #define AUDIO_PORT_MAX_NAME_LEN 128
385 /* maximum audio device address length */
386 #define AUDIO_DEVICE_MAX_ADDRESS_LEN 32
388 /* extension for audio port configuration structure when the audio port is a
390 struct audio_port_config_device_ext {
391 audio_module_handle_t hw_module; /* module the device is attached to */
392 audio_devices_t type; /* device type (e.g AUDIO_DEVICE_OUT_SPEAKER) */
393 char address[AUDIO_DEVICE_MAX_ADDRESS_LEN]; /* device address. "" if N/A */
396 /* extension for audio port configuration structure when the audio port is a
398 struct audio_port_config_mix_ext {
399 audio_module_handle_t hw_module; /* module the stream is attached to */
400 audio_io_handle_t handle; /* I/O handle of the input/output stream */
402 //TODO: change use case for output streams: use strategy and mixer attributes
403 audio_stream_type_t stream;
404 audio_source_t source;
408 /* extension for audio port configuration structure when the audio port is an
410 struct audio_port_config_session_ext {
411 audio_session_t session; /* audio session */
414 /* audio port configuration structure used to specify a particular configuration of
416 struct audio_port_config {
417 audio_port_handle_t id; /* port unique ID */
418 audio_port_role_t role; /* sink or source */
419 audio_port_type_t type; /* device, mix ... */
420 unsigned int config_mask; /* e.g AUDIO_PORT_CONFIG_ALL */
421 unsigned int sample_rate; /* sampling rate in Hz */
422 audio_channel_mask_t channel_mask; /* channel mask if applicable */
423 audio_format_t format; /* format if applicable */
424 struct audio_gain_config gain; /* gain to apply if applicable */
426 struct audio_port_config_device_ext device; /* device specific info */
427 struct audio_port_config_mix_ext mix; /* mix specific info */
428 struct audio_port_config_session_ext session; /* session specific info */
433 /* max number of sampling rates in audio port */
434 #define AUDIO_PORT_MAX_SAMPLING_RATES 32
435 /* max number of channel masks in audio port */
436 #define AUDIO_PORT_MAX_CHANNEL_MASKS 32
437 /* max number of audio formats in audio port */
438 #define AUDIO_PORT_MAX_FORMATS 32
439 /* max number of gain controls in audio port */
440 #define AUDIO_PORT_MAX_GAINS 16
442 /* extension for audio port structure when the audio port is a hardware device */
443 struct audio_port_device_ext {
444 audio_module_handle_t hw_module; /* module the device is attached to */
445 audio_devices_t type; /* device type (e.g AUDIO_DEVICE_OUT_SPEAKER) */
446 char address[AUDIO_DEVICE_MAX_ADDRESS_LEN];
449 /* extension for audio port structure when the audio port is a sub mix */
450 struct audio_port_mix_ext {
451 audio_module_handle_t hw_module; /* module the stream is attached to */
452 audio_io_handle_t handle; /* I/O handle of the input.output stream */
453 audio_mix_latency_class_t latency_class; /* latency class */
454 // other attributes: routing strategies
457 /* extension for audio port structure when the audio port is an audio session */
458 struct audio_port_session_ext {
459 audio_session_t session; /* audio session */
463 audio_port_handle_t id; /* port unique ID */
464 audio_port_role_t role; /* sink or source */
465 audio_port_type_t type; /* device, mix ... */
466 char name[AUDIO_PORT_MAX_NAME_LEN];
467 unsigned int num_sample_rates; /* number of sampling rates in following array */
468 unsigned int sample_rates[AUDIO_PORT_MAX_SAMPLING_RATES];
469 unsigned int num_channel_masks; /* number of channel masks in following array */
470 audio_channel_mask_t channel_masks[AUDIO_PORT_MAX_CHANNEL_MASKS];
471 unsigned int num_formats; /* number of formats in following array */
472 audio_format_t formats[AUDIO_PORT_MAX_FORMATS];
473 unsigned int num_gains; /* number of gains in following array */
474 struct audio_gain gains[AUDIO_PORT_MAX_GAINS];
475 struct audio_port_config active_config; /* current audio port configuration */
477 struct audio_port_device_ext device;
478 struct audio_port_mix_ext mix;
479 struct audio_port_session_ext session;
483 /* An audio patch represents a connection between one or more source ports and
484 * one or more sink ports. Patches are connected and disconnected by audio policy manager or by
485 * applications via framework APIs.
486 * Each patch is identified by a handle at the interface used to create that patch. For instance,
487 * when a patch is created by the audio HAL, the HAL allocates and returns a handle.
488 * This handle is unique to a given audio HAL hardware module.
489 * But the same patch receives another system wide unique handle allocated by the framework.
490 * This unique handle is used for all transactions inside the framework.
492 typedef int audio_patch_handle_t;
494 #define AUDIO_PATCH_PORTS_MAX 16
497 audio_patch_handle_t id; /* patch unique ID */
498 unsigned int num_sources; /* number of sources in following array */
499 struct audio_port_config sources[AUDIO_PATCH_PORTS_MAX];
500 unsigned int num_sinks; /* number of sinks in following array */
501 struct audio_port_config sinks[AUDIO_PATCH_PORTS_MAX];
506 /* a HW synchronization source returned by the audio HAL */
507 typedef uint32_t audio_hw_sync_t;
509 /* an invalid HW synchronization source indicating an error */
510 #define AUDIO_HW_SYNC_INVALID 0
513 * Mmap buffer descriptor returned by audio_stream->create_mmap_buffer().
514 * note\ Used by streams opened in mmap mode.
516 struct audio_mmap_buffer_info {
517 void* shared_memory_address; /**< base address of mmap memory buffer.
518 For use by local process only */
519 int32_t shared_memory_fd; /**< FD for mmap memory buffer */
520 int32_t buffer_size_frames; /**< total buffer size in frames */
521 int32_t burst_size_frames; /**< transfer size granularity in frames */
525 * Mmap buffer read/write position returned by audio_stream->get_mmap_position().
526 * note\ Used by streams opened in mmap mode.
528 struct audio_mmap_position {
529 int64_t time_nanoseconds; /**< timestamp in ns, CLOCK_MONOTONIC */
530 int32_t position_frames; /**< increasing 32 bit frame count reset when stream->stop()
534 static inline bool audio_is_output_device(audio_devices_t device)
536 if (((device & AUDIO_DEVICE_BIT_IN) == 0) &&
537 (popcount(device) == 1) && ((device & ~AUDIO_DEVICE_OUT_ALL) == 0))
543 static inline bool audio_is_input_device(audio_devices_t device)
545 if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
546 device &= ~AUDIO_DEVICE_BIT_IN;
547 if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_IN_ALL) == 0))
553 static inline bool audio_is_output_devices(audio_devices_t device)
555 return (device & AUDIO_DEVICE_BIT_IN) == 0;
558 static inline bool audio_is_a2dp_in_device(audio_devices_t device)
560 if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
561 device &= ~AUDIO_DEVICE_BIT_IN;
562 if ((popcount(device) == 1) && (device & AUDIO_DEVICE_IN_BLUETOOTH_A2DP))
568 static inline bool audio_is_a2dp_out_device(audio_devices_t device)
570 if ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_A2DP))
576 // Deprecated - use audio_is_a2dp_out_device() instead
577 static inline bool audio_is_a2dp_device(audio_devices_t device)
579 return audio_is_a2dp_out_device(device);
582 static inline bool audio_is_bluetooth_sco_device(audio_devices_t device)
584 if ((device & AUDIO_DEVICE_BIT_IN) == 0) {
585 if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_OUT_ALL_SCO) == 0))
588 device &= ~AUDIO_DEVICE_BIT_IN;
589 if ((popcount(device) == 1) && ((device & ~AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) == 0))
596 static inline bool audio_is_usb_out_device(audio_devices_t device)
598 return ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_ALL_USB));
601 static inline bool audio_is_usb_in_device(audio_devices_t device)
603 if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
604 device &= ~AUDIO_DEVICE_BIT_IN;
605 if (popcount(device) == 1 && (device & AUDIO_DEVICE_IN_ALL_USB) != 0)
611 /* OBSOLETE - use audio_is_usb_out_device() instead. */
612 static inline bool audio_is_usb_device(audio_devices_t device)
614 return audio_is_usb_out_device(device);
617 static inline bool audio_is_remote_submix_device(audio_devices_t device)
619 if ((audio_is_output_devices(device) &&
620 (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) == AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
621 || (!audio_is_output_devices(device) &&
622 (device & AUDIO_DEVICE_IN_REMOTE_SUBMIX) == AUDIO_DEVICE_IN_REMOTE_SUBMIX))
629 * representation is valid, and
630 * there is at least one channel bit set which _could_ correspond to an input channel, and
631 * there are no channel bits set which could _not_ correspond to an input channel.
632 * Otherwise returns false.
634 static inline bool audio_is_input_channel(audio_channel_mask_t channel)
636 uint32_t bits = audio_channel_mask_get_bits(channel);
637 switch (audio_channel_mask_get_representation(channel)) {
638 case AUDIO_CHANNEL_REPRESENTATION_POSITION:
639 if (bits & ~AUDIO_CHANNEL_IN_ALL) {
643 case AUDIO_CHANNEL_REPRESENTATION_INDEX:
651 * representation is valid, and
652 * there is at least one channel bit set which _could_ correspond to an output channel, and
653 * there are no channel bits set which could _not_ correspond to an output channel.
654 * Otherwise returns false.
656 static inline bool audio_is_output_channel(audio_channel_mask_t channel)
658 uint32_t bits = audio_channel_mask_get_bits(channel);
659 switch (audio_channel_mask_get_representation(channel)) {
660 case AUDIO_CHANNEL_REPRESENTATION_POSITION:
661 if (bits & ~AUDIO_CHANNEL_OUT_ALL) {
665 case AUDIO_CHANNEL_REPRESENTATION_INDEX:
672 /* Returns the number of channels from an input channel mask,
673 * used in the context of audio input or recording.
674 * If a channel bit is set which could _not_ correspond to an input channel,
675 * it is excluded from the count.
676 * Returns zero if the representation is invalid.
678 static inline uint32_t audio_channel_count_from_in_mask(audio_channel_mask_t channel)
680 uint32_t bits = audio_channel_mask_get_bits(channel);
681 switch (audio_channel_mask_get_representation(channel)) {
682 case AUDIO_CHANNEL_REPRESENTATION_POSITION:
683 // TODO: We can now merge with from_out_mask and remove anding
684 bits &= AUDIO_CHANNEL_IN_ALL;
686 case AUDIO_CHANNEL_REPRESENTATION_INDEX:
687 return popcount(bits);
693 /* Returns the number of channels from an output channel mask,
694 * used in the context of audio output or playback.
695 * If a channel bit is set which could _not_ correspond to an output channel,
696 * it is excluded from the count.
697 * Returns zero if the representation is invalid.
699 static inline uint32_t audio_channel_count_from_out_mask(audio_channel_mask_t channel)
701 uint32_t bits = audio_channel_mask_get_bits(channel);
702 switch (audio_channel_mask_get_representation(channel)) {
703 case AUDIO_CHANNEL_REPRESENTATION_POSITION:
704 // TODO: We can now merge with from_in_mask and remove anding
705 bits &= AUDIO_CHANNEL_OUT_ALL;
707 case AUDIO_CHANNEL_REPRESENTATION_INDEX:
708 return popcount(bits);
714 /* Derive a channel mask for index assignment from a channel count.
715 * Returns the matching channel mask,
716 * or AUDIO_CHANNEL_NONE if the channel count is zero,
717 * or AUDIO_CHANNEL_INVALID if the channel count exceeds AUDIO_CHANNEL_COUNT_MAX.
719 static inline audio_channel_mask_t audio_channel_mask_for_index_assignment_from_count(
720 uint32_t channel_count)
722 if (channel_count == 0) {
723 return AUDIO_CHANNEL_NONE;
725 if (channel_count > AUDIO_CHANNEL_COUNT_MAX) {
726 return AUDIO_CHANNEL_INVALID;
728 uint32_t bits = (1 << channel_count) - 1;
729 return audio_channel_mask_from_representation_and_bits(
730 AUDIO_CHANNEL_REPRESENTATION_INDEX, bits);
733 /* Derive an output channel mask for position assignment from a channel count.
734 * This is to be used when the content channel mask is unknown. The 1, 2, 4, 5, 6, 7 and 8 channel
735 * cases are mapped to the standard game/home-theater layouts, but note that 4 is mapped to quad,
736 * and not stereo + FC + mono surround. A channel count of 3 is arbitrarily mapped to stereo + FC
737 * for continuity with stereo.
738 * Returns the matching channel mask,
739 * or AUDIO_CHANNEL_NONE if the channel count is zero,
740 * or AUDIO_CHANNEL_INVALID if the channel count exceeds that of the
741 * configurations for which a default output channel mask is defined.
743 static inline audio_channel_mask_t audio_channel_out_mask_from_count(uint32_t channel_count)
746 switch (channel_count) {
748 return AUDIO_CHANNEL_NONE;
750 bits = AUDIO_CHANNEL_OUT_MONO;
753 bits = AUDIO_CHANNEL_OUT_STEREO;
756 bits = AUDIO_CHANNEL_OUT_STEREO | AUDIO_CHANNEL_OUT_FRONT_CENTER;
759 bits = AUDIO_CHANNEL_OUT_QUAD;
762 bits = AUDIO_CHANNEL_OUT_QUAD | AUDIO_CHANNEL_OUT_FRONT_CENTER;
765 bits = AUDIO_CHANNEL_OUT_5POINT1;
768 bits = AUDIO_CHANNEL_OUT_5POINT1 | AUDIO_CHANNEL_OUT_BACK_CENTER;
771 bits = AUDIO_CHANNEL_OUT_7POINT1;
775 return AUDIO_CHANNEL_INVALID;
777 return audio_channel_mask_from_representation_and_bits(
778 AUDIO_CHANNEL_REPRESENTATION_POSITION, bits);
781 /* Derive a default input channel mask from a channel count.
782 * Assumes a position mask for mono and stereo, or an index mask for channel counts > 2.
783 * Returns the matching channel mask,
784 * or AUDIO_CHANNEL_NONE if the channel count is zero,
785 * or AUDIO_CHANNEL_INVALID if the channel count exceeds that of the
786 * configurations for which a default input channel mask is defined.
788 static inline audio_channel_mask_t audio_channel_in_mask_from_count(uint32_t channel_count)
791 switch (channel_count) {
793 return AUDIO_CHANNEL_NONE;
795 bits = AUDIO_CHANNEL_IN_MONO;
798 bits = AUDIO_CHANNEL_IN_STEREO;
807 return audio_channel_mask_for_index_assignment_from_count(channel_count);
809 return AUDIO_CHANNEL_INVALID;
811 return audio_channel_mask_from_representation_and_bits(
812 AUDIO_CHANNEL_REPRESENTATION_POSITION, bits);
815 static inline bool audio_is_valid_format(audio_format_t format)
817 switch (format & AUDIO_FORMAT_MAIN_MASK) {
818 case AUDIO_FORMAT_PCM:
820 case AUDIO_FORMAT_PCM_16_BIT:
821 case AUDIO_FORMAT_PCM_8_BIT:
822 case AUDIO_FORMAT_PCM_32_BIT:
823 case AUDIO_FORMAT_PCM_8_24_BIT:
824 case AUDIO_FORMAT_PCM_FLOAT:
825 case AUDIO_FORMAT_PCM_24_BIT_PACKED:
831 case AUDIO_FORMAT_MP3:
832 case AUDIO_FORMAT_AMR_NB:
833 case AUDIO_FORMAT_AMR_WB:
834 case AUDIO_FORMAT_AAC:
835 case AUDIO_FORMAT_AAC_ADTS:
836 case AUDIO_FORMAT_HE_AAC_V1:
837 case AUDIO_FORMAT_HE_AAC_V2:
838 case AUDIO_FORMAT_VORBIS:
839 case AUDIO_FORMAT_OPUS:
840 case AUDIO_FORMAT_AC3:
841 case AUDIO_FORMAT_E_AC3:
842 case AUDIO_FORMAT_DTS:
843 case AUDIO_FORMAT_DTS_HD:
844 case AUDIO_FORMAT_IEC61937:
845 case AUDIO_FORMAT_DOLBY_TRUEHD:
846 case AUDIO_FORMAT_QCELP:
847 case AUDIO_FORMAT_EVRC:
848 case AUDIO_FORMAT_EVRCB:
849 case AUDIO_FORMAT_EVRCWB:
850 case AUDIO_FORMAT_AAC_ADIF:
851 case AUDIO_FORMAT_AMR_WB_PLUS:
852 case AUDIO_FORMAT_MP2:
853 case AUDIO_FORMAT_EVRCNW:
854 case AUDIO_FORMAT_FLAC:
855 case AUDIO_FORMAT_ALAC:
856 case AUDIO_FORMAT_APE:
857 case AUDIO_FORMAT_WMA:
858 case AUDIO_FORMAT_WMA_PRO:
859 case AUDIO_FORMAT_DSD:
860 case AUDIO_FORMAT_AC4:
861 case AUDIO_FORMAT_LDAC:
869 * Extract the primary format, eg. PCM, AC3, etc.
871 static inline audio_format_t audio_get_main_format(audio_format_t format)
873 return (audio_format_t)(format & AUDIO_FORMAT_MAIN_MASK);
877 * Is the data plain PCM samples that can be scaled and mixed?
879 static inline bool audio_is_linear_pcm(audio_format_t format)
881 return (audio_get_main_format(format) == AUDIO_FORMAT_PCM);
885 * For this format, is the number of PCM audio frames directly proportional
886 * to the number of data bytes?
888 * In other words, is the format transported as PCM audio samples,
889 * but not necessarily scalable or mixable.
890 * This returns true for real PCM, but also for AUDIO_FORMAT_IEC61937,
891 * which is transported as 16 bit PCM audio, but where the encoded data
892 * cannot be mixed or scaled.
894 static inline bool audio_has_proportional_frames(audio_format_t format)
896 audio_format_t mainFormat = audio_get_main_format(format);
897 return (mainFormat == AUDIO_FORMAT_PCM
898 || mainFormat == AUDIO_FORMAT_IEC61937);
901 static inline size_t audio_bytes_per_sample(audio_format_t format)
906 case AUDIO_FORMAT_PCM_32_BIT:
907 case AUDIO_FORMAT_PCM_8_24_BIT:
908 size = sizeof(int32_t);
910 case AUDIO_FORMAT_PCM_24_BIT_PACKED:
911 size = sizeof(uint8_t) * 3;
913 case AUDIO_FORMAT_PCM_16_BIT:
914 case AUDIO_FORMAT_IEC61937:
915 size = sizeof(int16_t);
917 case AUDIO_FORMAT_PCM_8_BIT:
918 size = sizeof(uint8_t);
920 case AUDIO_FORMAT_PCM_FLOAT:
921 size = sizeof(float);
929 /* converts device address to string sent to audio HAL via set_parameters */
930 static inline char *audio_device_address_to_parameter(audio_devices_t device, const char *address)
932 const size_t kSize = AUDIO_DEVICE_MAX_ADDRESS_LEN + sizeof("a2dp_sink_address=");
935 if (device & AUDIO_DEVICE_OUT_ALL_A2DP)
936 snprintf(param, kSize, "%s=%s", "a2dp_sink_address", address);
937 else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
938 snprintf(param, kSize, "%s=%s", "mix", address);
940 snprintf(param, kSize, "%s", address);
942 return strdup(param);
945 static inline bool audio_device_is_digital(audio_devices_t device) {
946 if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
948 return (~AUDIO_DEVICE_BIT_IN & device & (AUDIO_DEVICE_IN_ALL_USB |
949 AUDIO_DEVICE_IN_HDMI |
950 AUDIO_DEVICE_IN_SPDIF |
952 AUDIO_DEVICE_IN_BUS)) != 0;
955 return (device & (AUDIO_DEVICE_OUT_ALL_USB |
956 AUDIO_DEVICE_OUT_HDMI |
957 AUDIO_DEVICE_OUT_HDMI_ARC |
958 AUDIO_DEVICE_OUT_SPDIF |
959 AUDIO_DEVICE_OUT_IP |
960 AUDIO_DEVICE_OUT_BUS)) != 0;
964 // Unique effect ID (can be generated from the following site:
965 // http://www.itu.int/ITU-T/asn1/uuid.html)
966 // This struct is used for effects identification and in soundtrigger.
967 typedef struct audio_uuid_s {
970 uint16_t timeHiAndVersion;
975 //TODO: audio_microphone_location_t need to move to HAL v4.0
977 AUDIO_MICROPHONE_LOCATION_UNKNOW = 0,
978 AUDIO_MICROPHONE_LOCATION_MAINBODY = 1,
979 AUDIO_MICROPHONE_LOCATION_MAINBODY_MOVABLE = 2,
980 AUDIO_MICROPHONE_LOCATION_PERIPHERAL = 3,
981 AUDIO_MICROPHONE_LOCATION_CNT = 4,
982 } audio_microphone_location_t;
984 //TODO: audio_microphone_directionality_t need to move to HAL v4.0
986 AUDIO_MICROPHONE_DIRECTIONALITY_UNKNOW = 0,
987 AUDIO_MICROPHONE_DIRECTIONALITY_OMNI = 1,
988 AUDIO_MICROPHONE_DIRECTIONALITY_BI_DIRECTIONAL = 2,
989 AUDIO_MICROPHONE_DIRECTIONALITY_CARDIOID = 3,
990 AUDIO_MICROPHONE_DIRECTIONALITY_HYPER_CARDIOID = 4,
991 AUDIO_MICROPHONE_DIRECTIONALITY_SUPER_CARDIOID = 5,
992 AUDIO_MICROPHONE_DIRECTIONALITY_CNT = 6,
993 } audio_microphone_directionality_t;
995 /* A 3D point which could be used to represent geometric location
996 * or orientation of a microphone.
998 struct audio_microphone_coordinate {
1004 /* An number to indicate which group the microphone locate. Main body is
1005 * usually group 0. Developer could use this value to group the microphones
1006 * that locate on the same peripheral or attachments.
1008 typedef int audio_microphone_group_t;
1011 AUDIO_MICROPHONE_CHANNEL_MAPPING_UNUSED = 0,
1012 AUDIO_MICROPHONE_CHANNEL_MAPPING_DIRECT = 1,
1013 AUDIO_MICROPHONE_CHANNEL_MAPPING_PROCESSED = 2,
1014 } audio_microphone_channel_mapping_t;
1016 /* the maximum length for the microphone id */
1017 #define AUDIO_MICROPHONE_ID_MAX_LEN 32
1018 /* max number of frequency responses in a frequency response table */
1019 #define AUDIO_MICROPHONE_MAX_FREQUENCY_RESPONSES 32
1021 struct audio_microphone_characteristic_t {
1022 char device_id[AUDIO_MICROPHONE_ID_MAX_LEN];
1023 audio_port_handle_t id;
1024 audio_port_type_t type;
1025 char address[AUDIO_DEVICE_MAX_ADDRESS_LEN];
1026 audio_microphone_channel_mapping_t channel_mapping[AUDIO_CHANNEL_COUNT_MAX];
1027 audio_microphone_location_t location;
1028 audio_microphone_group_t group;
1029 unsigned int index_in_the_group;
1033 audio_microphone_directionality_t directionality;
1034 unsigned int num_frequency_responses;
1035 float frequency_responses[2][AUDIO_MICROPHONE_MAX_FREQUENCY_RESPONSES];
1036 struct audio_microphone_coordinate geometric_location;
1037 struct audio_microphone_coordinate orientation;
1043 * List of known audio HAL modules. This is the base name of the audio HAL
1044 * library composed of the "audio." prefix, one of the base names below and
1045 * a suffix specific to the device.
1046 * e.g: audio.primary.goldfish.so or audio.a2dp.default.so
1048 * The same module names are used in audio policy configuration files.
1051 #define AUDIO_HARDWARE_MODULE_ID_PRIMARY "primary"
1052 #define AUDIO_HARDWARE_MODULE_ID_A2DP "a2dp"
1053 #define AUDIO_HARDWARE_MODULE_ID_USB "usb"
1054 #define AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX "r_submix"
1055 #define AUDIO_HARDWARE_MODULE_ID_CODEC_OFFLOAD "codec_offload"
1056 #define AUDIO_HARDWARE_MODULE_ID_STUB "stub"
1059 * Multi-Stream Decoder (MSD) HAL service name. MSD HAL is used to mix
1060 * encoded streams together with PCM streams, producing re-encoded
1061 * streams or PCM streams.
1063 * The service must register itself using this name, and audioserver
1064 * tries to instantiate a device factory using this name as well.
1065 * Note that the HIDL implementation library file name *must* have the
1066 * suffix "msd" in order to be picked up by HIDL that is:
1068 * android.hardware.audio@x.x-implmsd.so
1070 #define AUDIO_HAL_SERVICE_NAME_MSD "msd"
1073 * Parameter definitions.
1074 * Note that in the framework code it's recommended to use AudioParameter.h
1075 * instead of these preprocessor defines, and for sure avoid just copying
1076 * the constant values.
1079 #define AUDIO_PARAMETER_VALUE_ON "on"
1080 #define AUDIO_PARAMETER_VALUE_OFF "off"
1083 * audio device parameters
1086 /* BT SCO Noise Reduction + Echo Cancellation parameters */
1087 #define AUDIO_PARAMETER_KEY_BT_NREC "bt_headset_nrec"
1089 /* Get a new HW synchronization source identifier.
1090 * Return a valid source (positive integer) or AUDIO_HW_SYNC_INVALID if an error occurs
1091 * or no HW sync is available. */
1092 #define AUDIO_PARAMETER_HW_AV_SYNC "hw_av_sync"
1095 #define AUDIO_PARAMETER_KEY_SCREEN_STATE "screen_state"
1098 * audio stream parameters
1101 #define AUDIO_PARAMETER_STREAM_ROUTING "routing" /* audio_devices_t */
1102 #define AUDIO_PARAMETER_STREAM_FORMAT "format" /* audio_format_t */
1103 #define AUDIO_PARAMETER_STREAM_CHANNELS "channels" /* audio_channel_mask_t */
1104 #define AUDIO_PARAMETER_STREAM_FRAME_COUNT "frame_count" /* size_t */
1105 #define AUDIO_PARAMETER_STREAM_INPUT_SOURCE "input_source" /* audio_source_t */
1106 #define AUDIO_PARAMETER_STREAM_SAMPLING_RATE "sampling_rate" /* uint32_t */
1108 #define AUDIO_PARAMETER_DEVICE_CONNECT "connect" /* audio_devices_t */
1109 #define AUDIO_PARAMETER_DEVICE_DISCONNECT "disconnect" /* audio_devices_t */
1111 /* Enable mono audio playback if 1, else should be 0. */
1112 #define AUDIO_PARAMETER_MONO_OUTPUT "mono_output"
1114 /* Set the HW synchronization source for an output stream. */
1115 #define AUDIO_PARAMETER_STREAM_HW_AV_SYNC "hw_av_sync"
1117 /* Query supported formats. The response is a '|' separated list of strings from
1118 * audio_format_t enum e.g: "sup_formats=AUDIO_FORMAT_PCM_16_BIT" */
1119 #define AUDIO_PARAMETER_STREAM_SUP_FORMATS "sup_formats"
1120 /* Query supported channel masks. The response is a '|' separated list of strings from
1121 * audio_channel_mask_t enum e.g: "sup_channels=AUDIO_CHANNEL_OUT_STEREO|AUDIO_CHANNEL_OUT_MONO" */
1122 #define AUDIO_PARAMETER_STREAM_SUP_CHANNELS "sup_channels"
1123 /* Query supported sampling rates. The response is a '|' separated list of integer values e.g:
1124 * "sup_sampling_rates=44100|48000" */
1125 #define AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES "sup_sampling_rates"
1127 #define AUDIO_PARAMETER_VALUE_LIST_SEPARATOR "|"
1130 * audio codec parameters
1133 #define AUDIO_OFFLOAD_CODEC_PARAMS "music_offload_codec_param"
1134 #define AUDIO_OFFLOAD_CODEC_BIT_PER_SAMPLE "music_offload_bit_per_sample"
1135 #define AUDIO_OFFLOAD_CODEC_BIT_RATE "music_offload_bit_rate"
1136 #define AUDIO_OFFLOAD_CODEC_AVG_BIT_RATE "music_offload_avg_bit_rate"
1137 #define AUDIO_OFFLOAD_CODEC_ID "music_offload_codec_id"
1138 #define AUDIO_OFFLOAD_CODEC_BLOCK_ALIGN "music_offload_block_align"
1139 #define AUDIO_OFFLOAD_CODEC_SAMPLE_RATE "music_offload_sample_rate"
1140 #define AUDIO_OFFLOAD_CODEC_ENCODE_OPTION "music_offload_encode_option"
1141 #define AUDIO_OFFLOAD_CODEC_NUM_CHANNEL "music_offload_num_channels"
1142 #define AUDIO_OFFLOAD_CODEC_DOWN_SAMPLING "music_offload_down_sampling"
1143 #define AUDIO_OFFLOAD_CODEC_DELAY_SAMPLES "delay_samples"
1144 #define AUDIO_OFFLOAD_CODEC_PADDING_SAMPLES "padding_samples"
1146 // FIXME: a temporary declaration for the incall music flag, will be removed when
1147 // declared in types.hal for audio HAL V4.0 and auto imported to audio-base.h
1148 #define AUDIO_OUTPUT_FLAG_INCALL_MUSIC 0x10000
1150 #endif // ANDROID_AUDIO_CORE_H