commit a052e57d427bd33e3f817d269907c07f2e247f15
author Ashish Jain <ashishj@codeaurora.org> Mon Nov 07 16:41:07 2016 +0530
committer Ashish Jain <ashishj@codeaurora.org> Tue Nov 08 07:54:34 2016 +0530
tree 349f8f86d8ad9caef630f701d0bcef8ee7d652fa
parent 44995bad21f370966af40db862d68320916026ce

hal: Configure correct COPP sample rate for USB and HDMI devices.

-In case of playback over HDMI/USB, the device might not support
the same sample rate as of the stream, though it is preferred that
resampling happens after post processing, but if device sample rate
is not even a multiple of stream sample rate, ensure that resampling
happens in the COPP.

Change-Id: Ia8cdff5294433ec099b703001d11da905bf82c9b

hal/audio_extn/utils.c

diff --git a/hal/audio_extn/utils.c b/hal/audio_extn/utils.c
index 9542fbd..eb3213c 100644
--- a/hal/audio_extn/utils.c
+++ b/hal/audio_extn/utils.c
@@ -666,6 +666,18 @@
         if ((24 == usecase->stream.out->bit_width) &&
             (usecase->stream.out->devices & AUDIO_DEVICE_OUT_SPEAKER)) {
             usecase->stream.out->app_type_cfg.sample_rate = DEFAULT_OUTPUT_SAMPLING_RATE;
+        } else if ((snd_device == SND_DEVICE_OUT_HDMI ||
+                    snd_device == SND_DEVICE_OUT_USB_HEADSET ||
+                    snd_device == SND_DEVICE_OUT_DISPLAY_PORT) &&
+                   (usecase->stream.out->sample_rate >= OUTPUT_SAMPLING_RATE_44100)) {
+             /*
+              * To best utlize DSP, check if the stream sample rate is supported/multiple of
+              * configured device sample rate, if not update the COPP rate to be equal to the
+              * device sample rate, else open COPP at stream sample rate
+              */
+              platform_check_and_update_copp_sample_rate(adev->platform, snd_device,
+                                      usecase->stream.out->sample_rate,
+                                      &usecase->stream.out->app_type_cfg.sample_rate);
         } else if ((snd_device != SND_DEVICE_OUT_HEADPHONES_44_1 &&
             usecase->stream.out->sample_rate == OUTPUT_SAMPLING_RATE_44100) ||
             (usecase->stream.out->sample_rate < OUTPUT_SAMPLING_RATE_44100)) {