AudioFlinger: call SPDIF wrapper from AudioFlinger

Create an interface layer between the AudioFlinger and the HAL
that manages the wrapping and format conversion.

Removed unnecessary includes.
Handle rate conversion in getRenderPosition().
Try to open HAL with encoded format before wrapping with SPDIF.

Bug: 17566660
Change-Id: I00ad888ca15ff0f85b85efb8167c7f5ea761a244
Signed-off-by: Phil Burk <philburk@google.com>

1 files changed, 88 insertions, 0 deletions

diff --git a/services/audioflinger/AudioHwDevice.h b/services/audioflinger/AudioHwDevice.h
new file mode 100644
index 0000000..b9f65c1
--- /dev/null
+++ b/services/audioflinger/AudioHwDevice.h
@@ -0,0 +1,88 @@
+/*
+**
+** Copyright 2007, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#ifndef ANDROID_AUDIO_HW_DEVICE_H
+#define ANDROID_AUDIO_HW_DEVICE_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include <hardware/audio.h>
+#include <utils/Errors.h>
+#include <system/audio.h>
+
+
+namespace android {
+
+class AudioStreamOut;
+
+class AudioHwDevice {
+public:
+    enum Flags {
+        AHWD_CAN_SET_MASTER_VOLUME  = 0x1,
+        AHWD_CAN_SET_MASTER_MUTE    = 0x2,
+    };
+
+    AudioHwDevice(audio_module_handle_t handle,
+                  const char *moduleName,
+                  audio_hw_device_t *hwDevice,
+                  Flags flags)
+        : mHandle(handle)
+        , mModuleName(strdup(moduleName))
+        , mHwDevice(hwDevice)
+        , mFlags(flags) { }
+    virtual ~AudioHwDevice() { free((void *)mModuleName); }
+
+    bool canSetMasterVolume() const {
+        return (0 != (mFlags & AHWD_CAN_SET_MASTER_VOLUME));
+    }
+
+    bool canSetMasterMute() const {
+        return (0 != (mFlags & AHWD_CAN_SET_MASTER_MUTE));
+    }
+
+    audio_module_handle_t handle() const { return mHandle; }
+    const char *moduleName() const { return mModuleName; }
+    audio_hw_device_t *hwDevice() const { return mHwDevice; }
+    uint32_t version() const { return mHwDevice->common.version; }
+
+    /** This method creates and opens the audio hardware output stream.
+     * The "address" parameter qualifies the "devices" audio device type if needed.
+     * The format format depends on the device type:
+     * - Bluetooth devices use the MAC address of the device in the form "00:11:22:AA:BB:CC"
+     * - USB devices use the ALSA card and device numbers in the form  "card=X;device=Y"
+     * - Other devices may use a number or any other string.
+     */
+    status_t openOutputStream(
+            AudioStreamOut **ppStreamOut,
+            audio_io_handle_t handle,
+            audio_devices_t devices,
+            audio_output_flags_t flags,
+            struct audio_config *config,
+            const char *address);
+
+private:
+    const audio_module_handle_t mHandle;
+    const char * const          mModuleName;
+    audio_hw_device_t * const   mHwDevice;
+    const Flags                 mFlags;
+};
+
+} // namespace android
+
+#endif // ANDROID_AUDIO_HW_DEVICE_H