ALSA: Further rework:

 * Get rid of non-async (ie tick task) mode due to inherent brokenness
 * Get rid of nonblock mode; we never write if buffers aren't sufficient
 * Move driver init into pcm_open() instead of pcm_init()
 * Much better underrun handling
 * Better error handling in some situations
 * Add in recording functionality
 * Use smaller audio buffers to avoid glitching
 * Don't start audio buffer with silence
 * Allow device name to be overridden by target

Recording portions based on work done by Lorenzo Miori in g#633

Change-Id: I0197bdc1749c28109eb79def1e6a3e1d62d8cef3

1 files changed, 6 insertions, 0 deletions

diff --git a/firmware/target/hosted/pcm-alsa.h b/firmware/target/hosted/pcm-alsa.h
index b746f0d259..f10574a6da 100644
--- a/firmware/target/hosted/pcm-alsa.h
+++ b/firmware/target/hosted/pcm-alsa.h
@@ -28,6 +28,12 @@
 void pcm_alsa_set_digital_volume(int vol_db_l, int vol_db_r);
 #endif
 
+/* These two should be invoked in your audiohw_preinit() call! */
+void pcm_alsa_set_playback_device(const char *device);
+#if defined(HAVE_RECORDING)
+void pcm_alsa_set_capture_device(const char *device);
+#endif
+
 int pcm_alsa_get_rate(void);
 
 #endif /* __PCM_ALSA_RB_H__ */