pcmaudiomixer.h

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/********************************************************************************************
* Twitch Broadcasting SDK
*
* This software is supplied under the terms of a license agreement with Twitch Interactive, Inc. and
* may not be copied or used except in accordance with the terms of that agreement
* Copyright (c) 2012-2016 Twitch Interactive, Inc.
*********************************************************************************************/

#pragma once

#include "twitchsdk/broadcast/audioconstants.h"

namespace ttv
{
    namespace broadcast
    {
        class PcmAudioMixer;
    }
}


class ttv::broadcast::PcmAudioMixer
{
public:
    PcmAudioMixer(uint32_t numChannels, uint32_t numSamplesPerChannelPerPacket);
    virtual ~PcmAudioMixer();

    // IAudioMixer implementation
    TTV_ErrorCode SubmitAudioSamples(const int16_t* data, uint64_t startTime, size_t length, float volume);
    TTV_ErrorCode GetNextPacketTime(uint64_t& nextPacketTime) const;
    TTV_ErrorCode GetPacket(int16_t* buffer, uint64_t& nextPacketTime);

private:
    typedef std::vector<int32_t> buffer_t;

    uint32_t mNumChannels;
    uint32_t mNumSamplesPerChannelPerPacket; // The number of samples that will be returned in a call to GetPacket().
    buffer_t mMixerBuffer;
    uint64_t mNextPacketTime;
};