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author | Andy Hung <hunga@google.com> | 2015-06-12 22:24:23 +0000 |
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committer | Android (Google) Code Review <android-gerrit@google.com> | 2015-06-12 22:24:26 +0000 |
commit | 8ae532dc48caa4375997f30b70fc85b461f05bef (patch) | |
tree | c1e2893c68cd2de0e1344d64b310fb6d51a33469 | |
parent | d4331fdae5247bdbac27f1db94cac504ea5afb78 (diff) | |
parent | 5e58a30b6f625d3c28d1c6b15eec3edf5643e227 (diff) | |
download | libhardware-8ae532dc48caa4375997f30b70fc85b461f05bef.tar.gz |
Merge "Update USB channel mask handling" into mnc-dev
-rw-r--r-- | modules/usbaudio/audio_hal.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/modules/usbaudio/audio_hal.c b/modules/usbaudio/audio_hal.c index 54314769..872fa934 100644 --- a/modules/usbaudio/audio_hal.c +++ b/modules/usbaudio/audio_hal.c @@ -55,6 +55,8 @@ static const unsigned k_force_channels = 0; #define DEFAULT_INPUT_BUFFER_SIZE_MS 20 +// stereo channel count +#define FCC_2 2 // fixed channel count of 8 limitation (for data processing in AudioFlinger) #define FCC_8 8 @@ -528,10 +530,14 @@ static int adev_open_output_stream(struct audio_hw_device *dev, proposed_channel_count = profile_get_default_channel_count(out->profile); } if (proposed_channel_count != 0) { - config->channel_mask = audio_channel_out_mask_from_count(proposed_channel_count); - if (config->channel_mask == AUDIO_CHANNEL_INVALID) + if (proposed_channel_count <= FCC_2) { + // use channel position mask for mono and stereo + config->channel_mask = audio_channel_out_mask_from_count(proposed_channel_count); + } else { + // use channel index mask for multichannel config->channel_mask = audio_channel_mask_for_index_assignment_from_count(proposed_channel_count); + } out->hal_channel_count = proposed_channel_count; } else { out->hal_channel_count = audio_channel_count_from_out_mask(config->channel_mask); |