73 lines
No EOL
2.4 KiB
C++
73 lines
No EOL
2.4 KiB
C++
#include "cwav.h"
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#include "../wav.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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u8* build_cwav(WAV wav, u32* size) {
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Header header;
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u32 offset = sizeof(Header);
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header.infoChunkOffset = offset;
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header.infoChunkLength = sizeof(InfoHeader);
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offset += header.infoChunkLength;
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offset += (sizeof(ChannelDataPointer) + sizeof(ChannelData)) * wav.format.numChannels;
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header.dataChunkOffset = offset;
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header.dataChunkLength = (u32) sizeof(DataHeader) + wav.data.chunkSize;
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offset += header.dataChunkLength;
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header.fileSize = offset;
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u8* output = (u8*) malloc(offset);
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u32 pos = 0;
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memcpy(output + pos, &header, sizeof(Header));
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pos += sizeof(Header);
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InfoHeader infoHeader;
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infoHeader.type = wav.format.bitsPerSample == 16 ? 1 : 0;
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infoHeader.sampleRate = wav.format.sampleRate;
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infoHeader.totalSamples = wav.data.chunkSize / (wav.format.bitsPerSample / 8) / wav.format.numChannels;
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infoHeader.totalChannels = wav.format.numChannels;
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memcpy(output + pos, &infoHeader, sizeof(InfoHeader));
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pos += sizeof(InfoHeader);
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for(int i = 0; i < wav.format.numChannels; i++) {
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ChannelDataPointer pointer;
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pointer.offset = 0x4 + (wav.format.numChannels * (u32) sizeof(ChannelDataPointer)) + (i * (u32) sizeof(ChannelData));
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memcpy(output + pos, &pointer, sizeof(ChannelDataPointer));
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pos += sizeof(ChannelDataPointer);
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}
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for(int i = 0; i < wav.format.numChannels; i++) {
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ChannelData data;
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data.offset = i * (wav.data.chunkSize / wav.format.numChannels);
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memcpy(output + pos, &data, sizeof(ChannelData));
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pos += sizeof(ChannelData);
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}
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DataHeader dataHeader;
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dataHeader.length = (u32) sizeof(DataHeader) + wav.data.chunkSize;
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memcpy(output + pos, &dataHeader, sizeof(DataHeader));
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pos += sizeof(DataHeader);
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u32 bytesPerChannel = wav.data.chunkSize / wav.format.numChannels;
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u32 bytesPerSample = (u32) wav.format.bitsPerSample / 8;
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for(int i = 0; i < wav.data.chunkSize; i += wav.format.numChannels * bytesPerSample) {
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for(int c = 0; c < wav.format.numChannels; c++) {
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memcpy(output + pos + (bytesPerChannel * c) + (i / wav.format.numChannels), wav.dataBytes + i + (c * bytesPerSample), bytesPerSample);
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}
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}
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pos += wav.data.chunkSize;
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if(size != NULL) {
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*size = pos;
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}
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return output;
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} |