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/*
* Copyright (C) 2015 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_IO_DESCRIPTOR_H
#define ANDROID_AUDIO_IO_DESCRIPTOR_H
namespace android {
enum audio_io_config_event {
AUDIO_OUTPUT_OPENED,
AUDIO_OUTPUT_CLOSED,
AUDIO_OUTPUT_CONFIG_CHANGED,
AUDIO_INPUT_OPENED,
AUDIO_INPUT_CLOSED,
AUDIO_INPUT_CONFIG_CHANGED,
};
// audio input/output descriptor used to cache output configurations in client process to avoid
// frequent calls through IAudioFlinger
class AudioIoDescriptor : public RefBase {
public:
AudioIoDescriptor() :
mIoHandle(AUDIO_IO_HANDLE_NONE),
mSamplingRate(0), mFormat(AUDIO_FORMAT_DEFAULT), mChannelMask(AUDIO_CHANNEL_NONE),
mFrameCount(0), mLatency(0)
{
memset(&mPatch, 0, sizeof(struct audio_patch));
}
virtual ~AudioIoDescriptor() {}
audio_port_handle_t getDeviceId() {
if (mPatch.num_sources != 0 && mPatch.num_sinks != 0) {
if (mPatch.sources[0].type == AUDIO_PORT_TYPE_MIX) {
// this is an output mix
// FIXME: the API only returns the first device in case of multiple device selection
return mPatch.sinks[0].id;
} else {
// this is an input mix
return mPatch.sources[0].id;
}
}
return AUDIO_PORT_HANDLE_NONE;
}
audio_io_handle_t mIoHandle;
struct audio_patch mPatch;
uint32_t mSamplingRate;
audio_format_t mFormat;
audio_channel_mask_t mChannelMask;
size_t mFrameCount;
uint32_t mLatency;
};
}; // namespace android
#endif /*ANDROID_AUDIO_IO_DESCRIPTOR_H*/
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