commit 61f449827974e117406693ef2cc6bdfdaf1fc00b
author Eric Laurent <elaurent@google.com> Thu Jan 17 18:21:59 2013 -0800
committer Eric Laurent <elaurent@google.com> Tue Jan 22 17:08:36 2013 -0800
tree 66a7f338c566c6ff6534ae0438408d59d347813d
parent c20a61f83701d18da09b17b8eb6d5908c05db7c4

audio: added support for dual mic capture

Added support for simultaneous capture of front and back mic.

Added device definitions for dual mic config for voice recognition use
case: no pre processing enabled.

stream->channels() reports actual channel mask instead of recontructing
it from channel count.

TODO: check if ACDB settings copied from single mic voice recognition
are correct.

Change-Id: I41282d0af5deb256ef68ec17ee34f5aae7807a6f

alsa_sound/AudioHardwareALSA.h

diff --git a/alsa_sound/AudioHardwareALSA.h b/alsa_sound/AudioHardwareALSA.h
index 932b18f..4ef878b 100644
--- a/alsa_sound/AudioHardwareALSA.h
+++ b/alsa_sound/AudioHardwareALSA.h
@@ -170,6 +170,7 @@
     struct pcm *        handle;
     snd_pcm_format_t    format;
     uint32_t            channels;
+    audio_channel_mask_t channelMask;
     uint32_t            sampleRate;
     unsigned int        latency;         // Delay in usec
     unsigned int        bufferSize;      // Size of sample buffer