131 lines
2.3 KiB
C
131 lines
2.3 KiB
C
#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "error.h"
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#include "file.h"
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#include "flac.h"
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#include "m4a.h"
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#include "mp3.h"
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#include "opus.h"
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#include "vorbis.h"
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#include "wav.h"
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#include "sid.h"
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/**
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* Obtain file type string from file_types enum.
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*
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* \param ft File type enum.
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* \return String representation of enum.
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*/
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const char* fileToStr(enum file_types ft)
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{
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static const char *file_types_str[] = {
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"UNKNOWN",
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"WAV",
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"FLAC",
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"VORBIS",
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"OPUS",
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"MP3",
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"SID",
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"M4A",
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"AAC"
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};
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return file_types_str[ft];
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}
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/**
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* Obtains file type.
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*
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* \param file File location.
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* \return file_types enum or 0 on error and errno set.
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*/
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enum file_types getFileType(const char *file)
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{
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FILE* ftest = fopen(file, "rb");
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uint32_t fileSig;
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enum file_types file_type = FILE_TYPE_ERROR;
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/* Failure opening file */
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if(ftest == NULL)
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return FILE_TYPE_ERROR;
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if(fread(&fileSig, 4, 1, ftest) == 0)
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goto err;
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switch(fileSig)
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{
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// "RIFF"
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case 0x46464952:
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// "riff"
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case 0x66666972:
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// "RIFX"
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case 0x58464952:
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// "RF64"
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case 0x34364652:
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// "FORM"
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case 0x4D524F46:
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file_type = FILE_TYPE_WAV;
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break;
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// "fLaC"
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case 0x43614c66:
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file_type = FILE_TYPE_FLAC;
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break;
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// "OggS"
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case 0x5367674F:
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if(isOpus(file) == 0)
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file_type = FILE_TYPE_OPUS;
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else if(isFlac(file) == 0)
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file_type = FILE_TYPE_FLAC;
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else if(isVorbis(file) == 0)
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file_type = FILE_TYPE_VORBIS;
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else
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errno = FILE_NOT_SUPPORTED;
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break;
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// "PSID" or "RSID"
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case 0x44495350:
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case 0x44495352:
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file_type = FILE_TYPE_SID;
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break;
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default:
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/* Check for M4A/AAC/ALAC (MP4 container with ftyp atom) */
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if((fileSig == 0x70797466) || /* 'ftyp' at offset 4 */
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(fileSig == 0x65657266)) /* 'free' at offset 4 (some M4A files) */
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{
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file_type = FILE_TYPE_M4A;
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break;
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}
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/* Check for raw AAC (ADTS format) - sync word 0xFFF */
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if((fileSig & 0xFFF60000) == 0xFFF00000)
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{
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file_type = FILE_TYPE_AAC;
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break;
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}
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/*
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* MP3 without ID3 tag, ID3v1 tag is at the end of file, or MP3
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* with ID3 tag at the beginning of the file.
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*/
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if(isMp3(file) == 0)
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{
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file_type = FILE_TYPE_MP3;
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break;
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}
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/* TODO: Add this again at some point */
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//printf("Unknown magic number: %#010x\n.", fileSig);
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errno = FILE_NOT_SUPPORTED;
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break;
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}err:
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fclose(ftest);
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return file_type;
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}
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