#include "AudioPlayer.h"
#include "Debuger.h"
#include "utils.h"
AudioPlayer::AudioPlayer(int index)
{
	mStatus = RUNNING;

	PaError err = Pa_Initialize();
	if (err != paNoError) {
		Debuger::Debug(L"init stream error\r\n");
		mStatus = FAIL;
	}
	//获得设备数量
	PaDeviceIndex iNumDevices = Pa_GetDeviceCount();
	if (iNumDevices < 0)
	{
	}
	for (int i = 0; i < iNumDevices; i++)
	{
		const PaDeviceInfo *deviceInfo = Pa_GetDeviceInfo(i);
		Debuger::Debug(L"index %d %d %d \r\n",i, 
			deviceInfo->maxInputChannels, deviceInfo->maxOutputChannels);        //打印设备名
	}
	mOutputParameters.device = index;
	mOutputParameters.channelCount = 2; //输出采用双声道，左声道在前
	mOutputParameters.sampleFormat = paInt16;
	mOutputParameters.suggestedLatency = Pa_GetDeviceInfo(mOutputParameters.device)->defaultLowOutputLatency;
	mOutputParameters.hostApiSpecificStreamInfo = NULL;

	err = Pa_OpenStream(&mOutStream, NULL, &mOutputParameters, 44100, 1024, 
		paFramesPerBufferUnspecified, NULL, NULL);
	if (err != paNoError) {
		Debuger::Debug(L"open output stream error\r\n");
		mStatus = FAIL;
		goto end;
	}
	err = Pa_StartStream(mOutStream);
	if (err != paNoError) {
		Debuger::Debug(L"start stream error\r\n");
		mStatus = FAIL;
	}
	end:
		return;
}

vector<AudioPlayer::SpeakerInfo> AudioPlayer::EnumSpeakers()
{
	vector<AudioPlayer::SpeakerInfo> ret;
	PaError err = Pa_Initialize();
	if (err != paNoError) {
		Debuger::Debug(L"init stream error\r\n");
		mStatus = FAIL;
	}
	//获得设备数量
	PaDeviceIndex iNumDevices = Pa_GetDeviceCount();
	if (iNumDevices <= 0)
	{
		return ret;
	}
	for (int i = 0; i < iNumDevices; i++)
	{
		SpeakerInfo ins;
		ins.index = i;
		const PaDeviceInfo *deviceInfo = Pa_GetDeviceInfo(i);
		if(nullptr != deviceInfo)
			if (deviceInfo->maxOutputChannels > 0) {
				ins.name = char2wchar(deviceInfo->name);
				ret.push_back(ins);
			}
	}
	return ret;
}
int AudioPlayer::Play(uint8_t * data, uint16_t num)
{
	PaError err;
	if (mStatus == RUNNING) {
		err = Pa_WriteStream(mOutStream, data, num);
		if (paNoError != err) {
			return -1;
		}
	}
	else {
		return -1;
	}
	return 0;
}
int AudioPlayer::OnAudioDecode(uint8_t * dat, uint16_t size)
{
	return this->Play(dat, 1024);
	return 0;
}