mirror of https://github.com/axmolengine/axmol.git
81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stddef.h>
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#include <stdint.h>
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#include "audio/android/utils/Errors.h"
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namespace cocos2d { namespace experimental {
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// ----------------------------------------------------------------------------
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class AudioBufferProvider
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{
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public:
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// FIXME merge with AudioTrackShared::Buffer, AudioTrack::Buffer, and AudioRecord::Buffer
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// and rename getNextBuffer() to obtainBuffer()
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struct Buffer {
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Buffer() : raw(NULL), frameCount(0) { }
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union {
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void* raw;
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short* i16;
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int8_t* i8;
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};
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size_t frameCount;
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};
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virtual ~AudioBufferProvider() {}
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// value representing an invalid presentation timestamp
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static const int64_t kInvalidPTS = 0x7FFFFFFFFFFFFFFFLL; // <stdint.h> is too painful
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// pts is the local time when the next sample yielded by getNextBuffer
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// will be rendered.
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// Pass kInvalidPTS if the PTS is unknown or not applicable.
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// On entry:
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// buffer != NULL
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// buffer->raw unused
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// buffer->frameCount maximum number of desired frames
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// On successful return:
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// status NO_ERROR
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// buffer->raw non-NULL pointer to buffer->frameCount contiguous available frames
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// buffer->frameCount number of contiguous available frames at buffer->raw,
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// 0 < buffer->frameCount <= entry value
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// On error return:
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// status != NO_ERROR
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// buffer->raw NULL
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// buffer->frameCount 0
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virtual status_t getNextBuffer(Buffer* buffer, int64_t pts = kInvalidPTS) = 0;
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// Release (a portion of) the buffer previously obtained by getNextBuffer().
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// It is permissible to call releaseBuffer() multiple times per getNextBuffer().
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// On entry:
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// buffer->frameCount number of frames to release, must be <= number of frames
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// obtained but not yet released
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// buffer->raw unused
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// On return:
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// buffer->frameCount 0; implementation MUST set to zero
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// buffer->raw undefined; implementation is PERMITTED to set to any value,
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// so if caller needs to continue using this buffer it must
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// keep track of the pointer itself
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virtual void releaseBuffer(Buffer* buffer) = 0;
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};
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// ----------------------------------------------------------------------------
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}} // namespace cocos2d { namespace experimental {
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