Windows 读取wav文件字节流并播放

Windows 读取wav文件字节流并播放

使用Windows Wave相关API播放wav文件，实现文件读取进内存，按照一定字节数播放，
对wav文件音频格式进行检测，只能播放48kHz采样率，16bit位深，单通道格式的音频文件。

 * @brief   wav文件读取解析和使用Windows api输出  * @date    2024-08-02  * @author  shentujia@qq.com  */  #include <iostream> #include <fstream> #include <string> #include <vector> #include "WAVHeader.h" #include<Windows.h> #include <MMSystem.h> #pragma comment(lib, "winmm.lib") // 48k 16bit 1channels 音频采样100ms数据大小为9600字节 #define  WAVE_BUFFER_SIZE 9600 using namespace std;  HWAVEOUT hWaveOut; // waveOut设备句柄 WAVEHDR waveOutHdr; // waveOut数据块头  int main() {     string audio_file = "rain_48khz_1ch_16bit.wav";     ifstream fin(audio_file, ios::binary);     if (!fin) {         cout << "open file failed!" << endl;         return 1;     }     WAVHeader header;     //读取wav文件头并保存到header对象中     fin.read((char*)&header, sizeof(header));     if (strncmp(header.riff.chunkID, "RIFF", 4) != 0 || strncmp(header.riff.format, "WAVE", 4) != 0         || strncmp(header.fmt.chunkID, "fmt ", 4) != 0 || strncmp(header.data.chunkID, "data", 4) != 0) {         cout << "file is not a valid WAV file" << endl;         return 1;     }     //判断音频文件是否为16bit 1channels 采样率为48000的音频文件     if(header.fmt.numChannels != 1 || header.fmt.bitsPerSample != 16||header.fmt.sampleRate!=48000){ 		cout << "only support 8bit 1channels audio file" << endl; 		return 1; 	}      WAVEFORMATEX waveFormat;     /*         WAVEFORMATEX是一种数据结构，用于指定波形音频流的数据格式。它包含以下字段：         wFormatTag：设置波形声音的格式。         nChannels：设置音频文件的通道数量，对于单声道的声音，此值为1；对于立体声，此值为2。         nSamplesPerSec：设置每个声道播放和记录时的样本频率。         nAvgBytesPerSec：设置每秒平均字节数。         nBlockAlign：设置数据块的对齐方式，即最小数据的原子大小。         wBitsPerSample：设置每个样本的位数。         cbSize：设置此结构的大小。     */     waveFormat.wFormatTag = WAVE_FORMAT_PCM;     waveFormat.nChannels = header.fmt.numChannels;     waveFormat.nSamplesPerSec = header.fmt.sampleRate;     waveFormat.nBlockAlign = header.fmt.blickAlign;     waveFormat.wBitsPerSample = header.fmt.bitsPerSample;     waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.wBitsPerSample / 8;     waveFormat.cbSize = 0; 	if (waveOutOpen(&hWaveOut, WAVE_MAPPER, &waveFormat, (DWORD_PTR)0, 0, CALLBACK_FUNCTION) != MMSYSERR_NOERROR) { 		cout << "无法打开音频设备" << endl; 		return 1; 	} 	char* pcmData = new char[header.data.chunkSize]; 	//读取wav文件的pcm数据部分，保存到char 数组中 	fin.read(pcmData, header.data.chunkSize);  	// 计算1毫秒内的样本字节数 	int bytesPerMs = (header.fmt.sampleRate / 1000) * (header.fmt.bitsPerSample / 8) * header.fmt.numChannels;      WAVEHDR* waveHdr = new WAVEHDR();     std::vector<char*>char_points; 	for (int i = 0; i < header.data.chunkSize; i += WAVE_BUFFER_SIZE) {         int buffersize = min(WAVE_BUFFER_SIZE, header.data.chunkSize - i);         char* perFrameData = new char[WAVE_BUFFER_SIZE];         char_points.push_back(perFrameData); 		memcpy(perFrameData, pcmData + i, WAVE_BUFFER_SIZE); 		cout << "play " << i << " to " << i + WAVE_BUFFER_SIZE << " bytes" <<",total:" <<header.data.chunkSize<< endl;                  waveHdr->lpData = perFrameData;         waveHdr->dwBufferLength = buffersize; 		waveHdr->dwFlags = 0; 		waveHdr->dwLoops = 0; 		if (waveOutPrepareHeader(hWaveOut, waveHdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) { 			cout << "无法准备音频数据" << endl; 			break; 		}  		if (waveOutWrite(hWaveOut, waveHdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) { 			cout << "无法播放音频" << endl; 			waveOutUnprepareHeader(hWaveOut, waveHdr, sizeof(WAVEHDR)); 			break; 		}         Sleep(90);  	}     getchar();     fin.close();     waveOutClose(hWaveOut);     //使用new创建的对象需要手动delete     delete waveHdr;     delete[] pcmData; 	for (auto& p : char_points) { 		delete[] p; 	} }