commit 31b530e05331742168f0c5e1d3c93dcdc19789d9
author Siddartha Shaik <sshaik@codeaurora.org> Fri May 19 15:26:33 2017 +0530
committer Shiv Maliyappanahalli <smaliyap@codeaurora.org> Thu Jul 27 12:21:40 2017 -0700
tree 4493cc2eb66da9e83b31c612287807aaa483af38
parent a427f14cf277e14eeba128c5d23bd42bc747b1bc

audio: hal: Add Hal extension for transcode loopback usecase

Adding HAL extension for transcode hw loopback
Userspace qahwi APIs introduced to exercise this extension

Change-Id: Iffae3f6936c2519f0c5349c2430eb598b97c3364

hal/msm8974/platform.c

diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index ad3927c..fdabbd5 100755
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -349,6 +349,7 @@
     [USECASE_AUDIO_RECORD_AFE_PROXY] = {AFE_PROXY_PLAYBACK_PCM_DEVICE,
                                         AFE_PROXY_RECORD_PCM_DEVICE},
     [USECASE_AUDIO_PLAYBACK_EXT_DISP_SILENCE] = {MULTIMEDIA9_PCM_DEVICE, -1},
+    [USECASE_AUDIO_TRANSCODE_LOOPBACK] = {TRANSCODE_LOOPBACK_RX_DEV_ID, TRANSCODE_LOOPBACK_TX_DEV_ID},
 
 };
 
@@ -5583,10 +5584,19 @@
 
     backend_idx = platform_get_backend_index(snd_device);
 
-    backend_cfg.bit_width = usecase->stream.out->bit_width;
-    backend_cfg.sample_rate = usecase->stream.out->sample_rate;
-    backend_cfg.format = usecase->stream.out->format;
-    backend_cfg.channels = audio_channel_count_from_out_mask(usecase->stream.out->channel_mask);
+    if (usecase->type == TRANSCODE_LOOPBACK) {
+        backend_cfg.bit_width = usecase->stream.inout->out_config.bit_width;
+        backend_cfg.sample_rate = usecase->stream.inout->out_config.sample_rate;
+        backend_cfg.format = usecase->stream.inout->out_config.format;
+        backend_cfg.channels = audio_channel_count_from_out_mask(
+                usecase->stream.inout->out_config.channel_mask);
+    } else {
+        backend_cfg.bit_width = usecase->stream.out->bit_width;
+        backend_cfg.sample_rate = usecase->stream.out->sample_rate;
+        backend_cfg.format = usecase->stream.out->format;
+        backend_cfg.channels = audio_channel_count_from_out_mask(usecase->stream.out->channel_mask);
+    }
+
     /*this is populated by check_codec_backend_cfg hence set default value to false*/
     backend_cfg.passthrough_enabled = false;
 
@@ -5716,7 +5726,14 @@
     struct audio_backend_cfg backend_cfg;
 
     backend_cfg.passthrough_enabled = false;
-    if(usecase->type == PCM_CAPTURE) {
+
+    if (usecase->type == TRANSCODE_LOOPBACK) {
+        backend_cfg.bit_width = usecase->stream.inout->in_config.bit_width;
+        backend_cfg.sample_rate = usecase->stream.inout->in_config.sample_rate;
+        backend_cfg.format = usecase->stream.inout->in_config.format;
+        backend_cfg.channels = audio_channel_count_from_out_mask(
+                usecase->stream.inout->in_config.channel_mask);
+    } else if (usecase->type == PCM_CAPTURE) {
         backend_cfg.sample_rate= usecase->stream.in->sample_rate;
         backend_cfg.bit_width= usecase->stream.in->bit_width;
         backend_cfg.format= usecase->stream.in->format;