commit ae28e3a118682f09a10d2bdfc661d162d50c1e94
author yidongh <yidongh@codeaurora.org> Fri Aug 19 11:31:15 2016 +0800
committer Gerrit - the friendly Code Review server <code-review@localhost> Wed Aug 31 00:56:14 2016 -0700
tree 1ec1070858d00ca69ebe7ebbe7d202ed2944bcab
parent b42c5ad509755c74d35bd15518dfef8f75be0662

policy_hal: add bitrate restriction for wma/wma_pro/wma_lossless

HW decoded wma is wrong when bit rate of wma files is over specific
threshold, and noise can be heard when playing high bitrate wma files.

Check the bitrate of wma files when checking offload support, when
bit rate is too high, wma cannot be offloaded.

Change-Id: Ib477b9a9fc583caabfd738c620de345105a08988
CRs-Fixed: 1053169

policy_hal/AudioPolicyManager.cpp

diff --git a/policy_hal/AudioPolicyManager.cpp b/policy_hal/AudioPolicyManager.cpp
index 122ac14..015ea25 100644
--- a/policy_hal/AudioPolicyManager.cpp
+++ b/policy_hal/AudioPolicyManager.cpp
@@ -511,6 +511,14 @@
             ALOGD("offload disabled for multi-channel FLAC/ALAC/WMA/AAC_ADTS clips with sample rate > 48kHz");
         return false;
     }
+
+    if ((((offloadInfo.format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_WMA) && (offloadInfo.bit_rate > MAX_BITRATE_WMA)) ||
+        (((offloadInfo.format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_WMA_PRO) && (offloadInfo.bit_rate > MAX_BITRATE_WMA_PRO)) ||
+        (((offloadInfo.format & AUDIO_FORMAT_MAIN_MASK) == AUDIO_FORMAT_WMA_PRO) && (offloadInfo.bit_rate > MAX_BITRATE_WMA_LOSSLESS))){
+        //Safely choose the min bitrate as threshold and leave the restriction to NT decoder as we can't distinguish wma pro and wma lossless here.
+        ALOGD("offload disabled for WMA/WMA_PRO/WMA_LOSSLESS clips with bit rate over maximum supported value");
+        return false;
+    }
 #endif
     //TODO: enable audio offloading with video when ready
     const bool allowOffloadWithVideo =