hardware_legacy: provide HAL helpers for legacy audio users

This doesn't actually create a HAL, but rather a set of helper static
libraries that device specific libraries (i.e. the old libaudio pieces)
can link against to create a proper audio HAL module.

We provide an audio_policy static wrapper and audio hardware interface
static wrapper.

Change-Id: Ie56195447ad24b83888f752dca24674b0afd8a76
Signed-off-by: Dima Zavin <dima@android.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/audio/AudioPolicyCompatClient.h b/audio/AudioPolicyCompatClient.h
new file mode 100644
index 0000000..073d379
--- /dev/null
+++ b/audio/AudioPolicyCompatClient.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2011 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_AUDIOPOLICYCLIENTLEGACY_H
+#define ANDROID_AUDIOPOLICYCLIENTLEGACY_H
+
+#include <hardware/audio.h>
+#include <hardware/audio_policy.h>
+#include <hardware/audio_policy_hal.h>
+
+#include <hardware_legacy/AudioSystemLegacy.h>
+#include <hardware_legacy/AudioPolicyInterface.h>
+
+/************************************/
+/* FOR BACKWARDS COMPATIBILITY ONLY */
+/************************************/
+namespace android_audio_legacy {
+
+class AudioPolicyCompatClient : public AudioPolicyClientInterface {
+public:
+    AudioPolicyCompatClient(struct audio_policy_service_ops *serviceOps,
+                            void *service) :
+            mServiceOps(serviceOps) , mService(service) {}
+
+    virtual audio_io_handle_t openOutput(uint32_t *pDevices,
+                                         uint32_t *pSamplingRate,
+                                         uint32_t *pFormat,
+                                         uint32_t *pChannels,
+                                         uint32_t *pLatencyMs,
+                                         AudioSystem::output_flags flags);
+    virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1,
+                                                  audio_io_handle_t output2);
+    virtual status_t closeOutput(audio_io_handle_t output);
+    virtual status_t suspendOutput(audio_io_handle_t output);
+    virtual status_t restoreOutput(audio_io_handle_t output);
+    virtual audio_io_handle_t openInput(uint32_t *pDevices,
+                                        uint32_t *pSamplingRate,
+                                        uint32_t *pFormat,
+                                        uint32_t *pChannels,
+                                        uint32_t acoustics);
+    virtual status_t closeInput(audio_io_handle_t input);
+    virtual status_t setStreamOutput(AudioSystem::stream_type stream, audio_io_handle_t output);
+    virtual status_t moveEffects(int session,
+                                 audio_io_handle_t srcOutput,
+                                 audio_io_handle_t dstOutput);
+
+    virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys);
+    virtual void setParameters(audio_io_handle_t ioHandle,
+                               const String8& keyValuePairs,
+                               int delayMs = 0);
+    virtual status_t setStreamVolume(AudioSystem::stream_type stream,
+                                     float volume,
+                                     audio_io_handle_t output,
+                                     int delayMs = 0);
+    virtual status_t startTone(ToneGenerator::tone_type tone, AudioSystem::stream_type stream);
+    virtual status_t stopTone();
+    virtual status_t setVoiceVolume(float volume, int delayMs = 0);
+
+private:
+    struct audio_policy_service_ops* mServiceOps;
+    void*                            mService;
+};
+
+}; // namespace android_audio_legacy
+
+#endif // ANDROID_AUDIOPOLICYCLIENTLEGACY_H