The document outlines a C++ program for playing WAV files in stereo, addressing issues of playback quality that arise when using mono audio. It includes a definition for a WAV header structure and provides a callback function for audio playback, alongside the main function which initializes and handles audio playback. The program attempts to open various WAV files and prints relevant audio information while managing playback control.

1. Visual Studio C++ OOP
I need to complete the program about how to play a WAV file in stereo.
the program seems to play the WAV file in mono since it has a bad sound quality.
chegg can't upload the WAV file, so I need you to use your own WAV file.
#include
#include
#include "CAudio.h"
#include "conio.h"
typedef struct wav_header {
// RIFF Header
char riff_header[4]; // Contains "RIFF"
int wav_size; // Size of the wav portion of the file, which follows the first 8 bytes. File size - 8
char wave_header[4]; // Contains "WAVE"
// Format Header
char fmt_header[4]; // Contains "fmt " (includes trailing space)
int fmt_chunk_size; // Should be 16 for PCM
short audio_format; // Should be 1 for PCM. 3 for IEEE Float
short num_channels;
int sample_rate;
int byte_rate; // Number of bytes per second. sample_rate * num_channels * Bytes Per
Sample
short sample_alignment; // num_channels * Bytes Per Sample
short bit_depth; // Number of bits per sample
// Data
char data_header[4]; // Contains "data"
int data_bytes; // Number of bytes in data. Number of samples * num_channels * sample byte
size
// uint8_t bytes[]; // Remainder of wave file is bytes
} wav_header;
CAudio *lp;
FILE *In;
int g_No = 0;

2. void CALLBACK Play_Proc(HWAVEOUT hWaveOut, UINT uMsg, DWORD dwInstance,
DWORD dwParam1, DWORD dwParam2)
{ int Len=160;
short Speech[160];
switch (uMsg)
{ case WOM_DONE:
if (lp->PStart)
{ if (In!=NULL) fread(Speech, 2, 160, In); // 160 Sample Data
if (feof(In)) fseek(In, 0, 0);
lp->Play_Speech(Speech, Len);
g_No += Len; printf("%dr", g_No++);
}
break;
}
}
int main()
{
lp = new CAudio();
// 2.Play WAV File
errno_t err;
wav_header Buf;
//if ((err = fopen_s(&In, "Speech.wav", "rb")) != 0) { printf("File Errorn"); return 0; }
if ((err = fopen_s(&In, "file_example_WAV_1MG.wav", "rb")) != 0) { printf("File Errorn");
return 0; }
//if ((err = fopen_s(&In, "guitartune.wav", "rb")) != 0) { printf("File Errorn"); return 0; }
//if ((err = fopen_s(&In, "rbds_capture_47500.wav", "rb")) != 0) { printf("File Errorn");
return 0; }
fread(&Buf, 1, sizeof(wav_header), In);
printf("Sample Rate=%dn", Buf.sample_rate);
printf("Channel =%dn", Buf.num_channels);
printf("Bits/Sample=%dn", Buf.bit_depth);
// 2.5
lp->Init_Audio(160, -1, -1, Buf.sample_rate);
lp->Open_Play((DWORD)Play_Proc, CALLBACK_FUNCTION);

3. lp->Start_Play();
//3.Play WAV File
char c = _getch();
// 4.
lp->Stop_Play();
lp->Close_Play();
// 5.
fclose(In); In = NULL;
}