diff options
Diffstat (limited to 'include/system/audio.h')
| -rw-r--r-- | include/system/audio.h | 63 |
1 files changed, 57 insertions, 6 deletions
diff --git a/include/system/audio.h b/include/system/audio.h index da235dd..aa7ac02 100644 --- a/include/system/audio.h +++ b/include/system/audio.h @@ -31,6 +31,9 @@ __BEGIN_DECLS * frameworks/base/include/media/AudioSystem.h */ +/* device address used to refer to the standard remote submix */ +#define AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS "0" + typedef int audio_io_handle_t; /* Audio stream types */ @@ -69,6 +72,11 @@ typedef enum { /* play the mix captured by this audio source. */ AUDIO_SOURCE_CNT, AUDIO_SOURCE_MAX = AUDIO_SOURCE_CNT - 1, + AUDIO_SOURCE_HOTWORD = 1999, /* A low-priority, preemptible audio source for + for background software hotword detection. + Same tuning as AUDIO_SOURCE_VOICE_RECOGNITION. + Used only internally to the framework. Not exposed + at the audio HAL. */ } audio_source_t; /* special audio session values @@ -383,9 +391,51 @@ typedef enum { // controls related to voice calls. AUDIO_OUTPUT_FLAG_FAST = 0x4, // output supports "fast tracks", // defined elsewhere - AUDIO_OUTPUT_FLAG_DEEP_BUFFER = 0x8 // use deep audio buffers + AUDIO_OUTPUT_FLAG_DEEP_BUFFER = 0x8, // use deep audio buffers + AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD = 0x10, // offload playback of compressed + // streams to hardware codec + AUDIO_OUTPUT_FLAG_NON_BLOCKING = 0x20 // use non-blocking write } audio_output_flags_t; +/* The audio input flags are analogous to audio output flags. + * Currently they are used only when an AudioRecord is created, + * to indicate a preference to be connected to an input stream with + * attributes corresponding to the specified flags. + */ +typedef enum { + AUDIO_INPUT_FLAG_NONE = 0x0, // no attributes + AUDIO_INPUT_FLAG_FAST = 0x1, // prefer an input that supports "fast tracks" +} audio_input_flags_t; + +/* Additional information about compressed streams offloaded to + * hardware playback + * The version and size fields must be initialized by the caller by using + * one of the constants defined here. + */ +typedef struct { + uint16_t version; // version of the info structure + uint16_t size; // total size of the structure including version and size + uint32_t sample_rate; // sample rate in Hz + audio_channel_mask_t channel_mask; // channel mask + audio_format_t format; // audio format + audio_stream_type_t stream_type; // stream type + uint32_t bit_rate; // bit rate in bits per second + int64_t duration_us; // duration in microseconds, -1 if unknown + bool has_video; // true if stream is tied to a video stream + bool is_streaming; // true if streaming, false if local playback +} audio_offload_info_t; + +#define AUDIO_MAKE_OFFLOAD_INFO_VERSION(maj,min) \ + ((((maj) & 0xff) << 8) | ((min) & 0xff)) + +#define AUDIO_OFFLOAD_INFO_VERSION_0_1 AUDIO_MAKE_OFFLOAD_INFO_VERSION(0, 1) +#define AUDIO_OFFLOAD_INFO_VERSION_CURRENT AUDIO_OFFLOAD_INFO_VERSION_0_1 + +static const audio_offload_info_t AUDIO_INFO_INITIALIZER = { + version: AUDIO_OFFLOAD_INFO_VERSION_CURRENT, + size: sizeof(audio_offload_info_t), +}; + static inline bool audio_is_output_device(audio_devices_t device) { if (((device & AUDIO_DEVICE_BIT_IN) == 0) && @@ -439,24 +489,25 @@ static inline bool audio_is_usb_device(audio_devices_t device) static inline bool audio_is_remote_submix_device(audio_devices_t device) { - if ((popcount(device) == 1) && (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX)) + if ((device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX) == AUDIO_DEVICE_OUT_REMOTE_SUBMIX + || (device & AUDIO_DEVICE_IN_REMOTE_SUBMIX) == AUDIO_DEVICE_IN_REMOTE_SUBMIX) return true; else return false; } -static inline bool audio_is_input_channel(uint32_t channel) +static inline bool audio_is_input_channel(audio_channel_mask_t channel) { if ((channel & ~AUDIO_CHANNEL_IN_ALL) == 0) - return true; + return channel != 0; else return false; } -static inline bool audio_is_output_channel(uint32_t channel) +static inline bool audio_is_output_channel(audio_channel_mask_t channel) { if ((channel & ~AUDIO_CHANNEL_OUT_ALL) == 0) - return true; + return channel != 0; else return false; } |