commit 8c03e67b06c84e4a21edd62906b8a0d7e12eeff9
author David Lin <dtwlin@google.com> Mon Feb 06 20:31:38 2017 -0800
committer David Lin <dtwlin@google.com> Wed Mar 01 19:43:42 2017 -0800
tree 127a1c79ff20862a163f779749431f940ebbae24
parent 240fc43222070bc9e19d70f5a38407d424ea34c1

hal: add usb audio tunnel support

This patch imports the USB audio tunnel feature from QCOM software release
AU_LINUX_ANDROID_LA.UM.5.7.R1.07.00.00.253.

Bug: 33030406
Test: playback, record and path switching

Change-Id: I2479f984c0d72b2f4e9b6a7db22eb4616855b7e7
Signed-off-by: David Lin <dtwlin@google.com>

hal/audio_hw.c

diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 85216bc..4af1e9c 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -855,6 +855,8 @@
     bool switch_device[AUDIO_USECASE_MAX];
     int i, num_uc_to_switch = 0;
 
+    platform_check_and_set_playback_backend_cfg(adev, uc_info, snd_device);
+
     /*
      * This function is to make sure that all the usecases that are active on
      * the hardware codec backend are always routed to any one device that is
@@ -1199,7 +1201,8 @@
 
     /* Enable new sound devices */
     if (out_snd_device != SND_DEVICE_NONE) {
-        if (usecase->devices & AUDIO_DEVICE_OUT_ALL_CODEC_BACKEND)
+        if ((usecase->devices & AUDIO_DEVICE_OUT_ALL_CODEC_BACKEND) ||
+            (usecase->devices & AUDIO_DEVICE_OUT_USB_DEVICE))
             check_and_route_playback_usecases(adev, usecase, out_snd_device);
         enable_snd_device(adev, out_snd_device);
     }
@@ -3555,6 +3558,43 @@
         adev->bt_wb_speech_enabled = !strcmp(value, AUDIO_PARAMETER_VALUE_ON);
     }
 
+    ret = str_parms_get_str(parms, AUDIO_PARAMETER_DEVICE_CONNECT, value, sizeof(value));
+    if (ret >= 0) {
+        audio_devices_t device = (audio_devices_t)strtoul(value, NULL, 10);
+        if (device == AUDIO_DEVICE_OUT_USB_DEVICE) {
+            ret = str_parms_get_str(parms, "card", value, sizeof(value));
+            if (ret >= 0) {
+                const int card = atoi(value);
+                audio_extn_usb_add_device(AUDIO_DEVICE_OUT_USB_DEVICE, card);
+            }
+        } else if (device == AUDIO_DEVICE_IN_USB_DEVICE) {
+            ret = str_parms_get_str(parms, "card", value, sizeof(value));
+            if (ret >= 0) {
+                const int card = atoi(value);
+                audio_extn_usb_add_device(AUDIO_DEVICE_IN_USB_DEVICE, card);
+            }
+        }
+    }
+
+    ret = str_parms_get_str(parms, AUDIO_PARAMETER_DEVICE_DISCONNECT, value, sizeof(value));
+    if (ret >= 0) {
+        audio_devices_t device = (audio_devices_t)strtoul(value, NULL, 10);
+        if (device == AUDIO_DEVICE_OUT_USB_DEVICE) {
+            ret = str_parms_get_str(parms, "card", value, sizeof(value));
+            if (ret >= 0) {
+                const int card = atoi(value);
+
+                audio_extn_usb_remove_device(AUDIO_DEVICE_OUT_USB_DEVICE, card);
+            }
+        } else if (device == AUDIO_DEVICE_IN_USB_DEVICE) {
+            ret = str_parms_get_str(parms, "card", value, sizeof(value));
+            if (ret >= 0) {
+                const int card = atoi(value);
+                audio_extn_usb_remove_device(AUDIO_DEVICE_IN_USB_DEVICE, card);
+            }
+        }
+    }
+
     audio_extn_hfp_set_parameters(adev, parms);
 done:
     str_parms_destroy(parms);