diff options
Diffstat (limited to 'include/system')
| -rw-r--r-- | include/system/audio.h | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/include/system/audio.h b/include/system/audio.h index da235dd..c49b0ee 100644 --- a/include/system/audio.h +++ b/include/system/audio.h @@ -383,9 +383,41 @@ 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; +/* 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) && |