105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
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////////////////////////////////
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// NOTE(allen): Load Clip
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#if !defined(FCODER_SKIP_WAV)
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#define FCODER_SKIP_WAV
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#pragma pack(push, 1)
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struct wave_fmt_data
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{
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u16 wFormatTag;
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u16 wChannels;
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u32 dwSamplesPerSec;
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u32 dwAvgBytesPerSec;
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u16 wBlockAlign;
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u16 wBitsPerSample;
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};
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struct riff_header
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{
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u32 ID;
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u32 DataSize;
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};
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#pragma pack(pop)
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#endif
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function Audio_Clip
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audio_clip_from_wav_data(String_Const_u8 data){
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Audio_Clip Result = {};
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if (data.size >= 4 && *(u32 *)data.str == *(u32 *)"RIFF"){
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// NOTE(casey): This ROM is in WAV format
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riff_header *RootHeader = (riff_header *)data.str;
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wave_fmt_data *Format = 0;
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u32 SampleDataSize = 0;
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i16 *Samples = 0;
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u32 At = sizeof(riff_header);
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u32 LastAt = At + ((RootHeader->DataSize + 1) & ~1);
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if ((*(u32 *)(data.str + At) == *(u32 *)"WAVE") &&
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(LastAt <= data.size)){
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At += sizeof(u32);
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while (At < LastAt){
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riff_header *Header = (riff_header *)(data.str + At);
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u32 DataAt = At + sizeof(riff_header);
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u32 EndAt = DataAt + ((Header->DataSize + 1) & ~1);
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if(EndAt <= data.size)
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{
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void *Data = (data.str + DataAt);
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if(Header->ID == *(u32 *)"fmt ")
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{
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Format = (wave_fmt_data *)Data;
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}
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else if(Header->ID == *(u32 *)"data")
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{
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SampleDataSize = Header->DataSize;
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Samples = (i16 *)Data;
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}
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}
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At = EndAt;
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}
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}
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if (Format &&
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Samples &&
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(Format->wFormatTag == 1) &&
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(Format->wChannels == 2) &&
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(Format->wBitsPerSample == 16) &&
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(Format->dwSamplesPerSec == 48000)){
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Result.sample_count = SampleDataSize / (Format->wChannels*Format->wBitsPerSample/8);
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Result.samples = (i16 *)Samples;
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}
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else{
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// TODO(casey): This is where you would output an error - to 4coder somehow?
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}
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}
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else{
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// TODO(casey): This is where you would output an error - to 4coder somehow?
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}
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return(Result);
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}
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#include <stdlib.h>
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function Audio_Clip
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audio_clip_from_wav_file_name(char *file_name){
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String_Const_u8 data = {};
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FILE *file = fopen(file_name, "rb");
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if (file != 0){
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fseek(file, 0, SEEK_END);
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data.size = ftell(file);
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data.str = (u8*)malloc(data.size);
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if (data.str != 0 && data.size > 0){
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fseek(file, 0, SEEK_SET);
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fread(data.str, data.size, 1, file);
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}
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fclose(file);
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}
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Audio_Clip result = audio_clip_from_wav_data(data);
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return(result);
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}
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