mirror of https://github.com/axmolengine/axmol.git
81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include "audio/android/utils/Errors.h"
|
|
|
|
namespace cocos2d {
|
|
// ----------------------------------------------------------------------------
|
|
|
|
class AudioBufferProvider
|
|
{
|
|
public:
|
|
|
|
// FIXME merge with AudioTrackShared::Buffer, AudioTrack::Buffer, and AudioRecord::Buffer
|
|
// and rename getNextBuffer() to obtainBuffer()
|
|
struct Buffer {
|
|
Buffer() : raw(NULL), frameCount(0) { }
|
|
union {
|
|
void* raw;
|
|
short* i16;
|
|
int8_t* i8;
|
|
};
|
|
size_t frameCount;
|
|
};
|
|
|
|
virtual ~AudioBufferProvider() {}
|
|
|
|
// 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.
|
|
// On entry:
|
|
// buffer != NULL
|
|
// buffer->raw unused
|
|
// buffer->frameCount maximum number of desired frames
|
|
// On successful return:
|
|
// status NO_ERROR
|
|
// buffer->raw non-NULL pointer to buffer->frameCount contiguous available frames
|
|
// buffer->frameCount number of contiguous available frames at buffer->raw,
|
|
// 0 < buffer->frameCount <= entry value
|
|
// On error return:
|
|
// status != NO_ERROR
|
|
// buffer->raw NULL
|
|
// buffer->frameCount 0
|
|
virtual status_t getNextBuffer(Buffer* buffer, int64_t pts = kInvalidPTS) = 0;
|
|
|
|
// Release (a portion of) the buffer previously obtained by getNextBuffer().
|
|
// It is permissible to call releaseBuffer() multiple times per getNextBuffer().
|
|
// On entry:
|
|
// buffer->frameCount number of frames to release, must be <= number of frames
|
|
// obtained but not yet released
|
|
// buffer->raw unused
|
|
// On return:
|
|
// buffer->frameCount 0; implementation MUST set to zero
|
|
// buffer->raw undefined; implementation is PERMITTED to set to any value,
|
|
// so if caller needs to continue using this buffer it must
|
|
// keep track of the pointer itself
|
|
virtual void releaseBuffer(Buffer* buffer) = 0;
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
} // namespace cocos2d {
|