Adolfo Reyna
c7dc66e04b
- es8311 driver open() now allows OUTPUT->INPUT complementary (promotes to BOTH) when same native rate 44100 - audio-stream close_stream() ref-counts shared BOTH codec (don't close if other direction still open) - MCP recordVoice + VoiceRecorder app explicitly unmute and set 100% gain Fixes mic input not working - was returning ERROR_RESOURCE when output already open
Audio stream module
Defines AUDIO_STREAM_TYPE and AudioStreamApi: the high-level, full-duplex
audio API that apps (including ELF side-loaded apps) and AudioService should
use instead of talking to an AUDIO_CODEC_TYPE device directly. Binds to one
input-capable and/or one output-capable codec device (found automatically at
start; see Drivers/audio-codec-module) and adds on top of it:
- Resampling, so the same app code works at any requested sample rate regardless of what rate the bound codec natively runs at.
- Shared volume/mute/enable state per direction, with a change callback
(
AudioStreamChangeCallback) thatAudioServicesubscribes to. - A single always-present device (
audio-stream0), constructed unconditionally at module-start time before any devicetree codec exists, and bound lazily on first use -- so boards with no audio hardware at all still get a harmless, inert device rather than nothing.
open_input/open_output return a stream handle; read/write on that
handle are blocking and must be called from the caller's own task, never from
the main/LVGL thread.
License: Apache v2.0