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/*
* Copyright (C) 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_BUFFER_PROVIDER_H
#define ANDROID_AUDIO_BUFFER_PROVIDER_H
#include <utils/Errors.h>
namespace android {
// ----------------------------------------------------------------------------
class AudioBufferProvider
{
public:
struct Buffer {
Buffer() : raw(NULL), frameCount(0) { }
union {
void* raw;
short* i16;
int8_t* i8;
};
size_t frameCount;
};
protected:
AudioBufferProvider() : mValid(kValid) { }
virtual ~AudioBufferProvider() { mValid = kDead; }
public:
// value representing an invalid presentation timestamp
static const int64_t kInvalidPTS = 0x7FFFFFFFFFFFFFFFLL; // <stdint.h> is too painful
// pts is the local time when the next sample yielded by getNextBuffer
// will be rendered.
// Pass kInvalidPTS if the PTS is unknown or not applicable.
virtual status_t getNextBuffer(Buffer* buffer, int64_t pts = kInvalidPTS) = 0;
virtual void releaseBuffer(Buffer* buffer) = 0;
int getValid() const { return mValid; }
static const int kValid = 'GOOD';
static const int kDead = 'DEAD';
private:
int mValid;
};
// ----------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_AUDIO_BUFFER_PROVIDER_H
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