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Чтение .wav файла (С++ / СPP) / Reading .wav file (C++ / CPP)
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| #include <iostream> | |
| #include <cstdio> | |
| #include <cmath> | |
| #include "string.h" | |
| #include "mem.h" | |
| //Wav Header | |
| struct wav_header_t | |
| { | |
| char chunkID[4]; //"RIFF" = 0x46464952 | |
| unsigned long chunkSize; //28 [+ sizeof(wExtraFormatBytes) + wExtraFormatBytes] + sum(sizeof(chunk.id) + sizeof(chunk.size) + chunk.size) | |
| char format[4]; //"WAVE" = 0x45564157 | |
| char subchunk1ID[4]; //"fmt " = 0x20746D66 | |
| unsigned long subchunk1Size; //16 [+ sizeof(wExtraFormatBytes) + wExtraFormatBytes] | |
| unsigned short audioFormat; | |
| unsigned short numChannels; | |
| unsigned long sampleRate; | |
| unsigned long byteRate; | |
| unsigned short blockAlign; | |
| unsigned short bitsPerSample; | |
| //[WORD wExtraFormatBytes;] | |
| //[Extra format bytes] | |
| }; | |
| //Chunks | |
| struct chunk_t | |
| { | |
| char ID[4]; //"data" = 0x61746164 | |
| unsigned long size; //Chunk data bytes | |
| }; | |
| void WavReader (const char* fileName, const char* fileToSave) | |
| { | |
| FILE *fin = fopen(fileName, "rb"); | |
| //Read WAV header | |
| wav_header_t header; | |
| fread(&header, sizeof(header), 1, fin); | |
| //Print WAV header | |
| printf("WAV File Header read:\n"); | |
| printf("File Type: %s\n", header.chunkID); | |
| printf("File Size: %ld\n", header.chunkSize); | |
| printf("WAV Marker: %s\n", header.format); | |
| printf("Format Name: %s\n", header.subchunk1ID); | |
| printf("Format Length: %ld\n", header.subchunk1Size ); | |
| printf("Format Type: %hd\n", header.audioFormat); | |
| printf("Number of Channels: %hd\n", header.numChannels); | |
| printf("Sample Rate: %ld\n", header.sampleRate); | |
| printf("Sample Rate * Bits/Sample * Channels / 8: %ld\n", header.byteRate); | |
| printf("Bits per Sample * Channels / 8.1: %hd\n", header.blockAlign); | |
| printf("Bits per Sample: %hd\n", header.bitsPerSample); | |
| //skip wExtraFormatBytes & extra format bytes | |
| //fseek(f, header.chunkSize - 16, SEEK_CUR); | |
| //Reading file | |
| chunk_t chunk; | |
| printf("id\t" "size\n"); | |
| //go to data chunk | |
| while (true) | |
| { | |
| fread(&chunk, sizeof(chunk), 1, fin); | |
| printf("%c%c%c%c\t" "%li\n", chunk.ID[0], chunk.ID[1], chunk.ID[2], chunk.ID[3], chunk.size); | |
| if (*(unsigned int *)&chunk.ID == 0x61746164) | |
| break; | |
| //skip chunk data bytes | |
| fseek(fin, chunk.size, SEEK_CUR); | |
| } | |
| //Number of samples | |
| int sample_size = header.bitsPerSample / 8; | |
| int samples_count = chunk.size * 8 / header.bitsPerSample; | |
| printf("Samples count = %i\n", samples_count); | |
| short int *value = new short int[samples_count]; | |
| memset(value, 0, sizeof(short int) * samples_count); | |
| //Reading data | |
| for (int i = 0; i < samples_count; i++) | |
| { | |
| fread(&value[i], sample_size, 1, fin); | |
| } | |
| //Write data into the file | |
| FILE *fout = fopen(fileToSave, "w"); | |
| for (int i = 0; i < samples_count; i++) | |
| { | |
| fprintf(fout, "%d\n", value[i]); | |
| } | |
| fclose(fin); | |
| fclose(fout); | |
| } | |
| int main() | |
| { | |
| WavReader("E:/TEMP/20_21_converted.wav", "list.dat"); | |
| return 0; | |
| } |
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