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Merge "Update USB channel mask handling" into mnc-dev

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Andy Hung 2015-06-12 22:24:23 +00:00 committed by Android (Google) Code Review
commit 8ae532dc48
1 changed files with 8 additions and 2 deletions
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8
modules/usbaudio/audio_hal.c
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@ -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) {
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);
if (config->channel_mask == AUDIO_CHANNEL_INVALID)
} 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);