cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

testresample.c (3736B)

      1/*
      2  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
      3
      4  This software is provided 'as-is', without any express or implied
      5  warranty.  In no event will the authors be held liable for any damages
      6  arising from the use of this software.
      7
      8  Permission is granted to anyone to use this software for any purpose,
      9  including commercial applications, and to alter it and redistribute it
     10  freely.
     11*/
     12
     13#include "SDL.h"
     14
     15int
     16main(int argc, char **argv)
     17{
     18    SDL_AudioSpec spec;
     19    SDL_AudioCVT cvt;
     20    Uint32 len = 0;
     21    Uint8 *data = NULL;
     22    int cvtfreq = 0;
     23    int bitsize = 0;
     24    int blockalign = 0;
     25    int avgbytes = 0;
     26    SDL_RWops *io = NULL;
     27
     28	/* Enable standard application logging */
     29    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
     30
     31    if (argc != 4) {
     32        SDL_Log("USAGE: %s in.wav out.wav newfreq\n", argv[0]);
     33        return 1;
     34    }
     35
     36    cvtfreq = SDL_atoi(argv[3]);
     37
     38    if (SDL_Init(SDL_INIT_AUDIO) == -1) {
     39        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
     40        return 2;
     41    }
     42
     43    if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) {
     44        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s\n", argv[1], SDL_GetError());
     45        SDL_Quit();
     46        return 3;
     47    }
     48
     49    if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq,
     50                          spec.format, spec.channels, cvtfreq) == -1) {
     51        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to build CVT: %s\n", SDL_GetError());
     52        SDL_FreeWAV(data);
     53        SDL_Quit();
     54        return 4;
     55    }
     56
     57    cvt.len = len;
     58    cvt.buf = (Uint8 *) SDL_malloc(len * cvt.len_mult);
     59    if (cvt.buf == NULL) {
     60        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory.\n");
     61        SDL_FreeWAV(data);
     62        SDL_Quit();
     63        return 5;
     64    }
     65    SDL_memcpy(cvt.buf, data, len);
     66
     67    if (SDL_ConvertAudio(&cvt) == -1) {
     68        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Conversion failed: %s\n", SDL_GetError());
     69        SDL_free(cvt.buf);
     70        SDL_FreeWAV(data);
     71        SDL_Quit();
     72        return 6;
     73    }
     74
     75    /* write out a WAV header... */
     76    io = SDL_RWFromFile(argv[2], "wb");
     77    if (io == NULL) {
     78        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fopen('%s') failed: %s\n", argv[2], SDL_GetError());
     79        SDL_free(cvt.buf);
     80        SDL_FreeWAV(data);
     81        SDL_Quit();
     82        return 7;
     83    }
     84
     85    bitsize = SDL_AUDIO_BITSIZE(spec.format);
     86    blockalign = (bitsize / 8) * spec.channels;
     87    avgbytes = cvtfreq * blockalign;
     88
     89    SDL_WriteLE32(io, 0x46464952);      /* RIFF */
     90    SDL_WriteLE32(io, len * cvt.len_mult + 36);
     91    SDL_WriteLE32(io, 0x45564157);      /* WAVE */
     92    SDL_WriteLE32(io, 0x20746D66);      /* fmt */
     93    SDL_WriteLE32(io, 16);      /* chunk size */
     94    SDL_WriteLE16(io, 1);       /* uncompressed */
     95    SDL_WriteLE16(io, spec.channels);   /* channels */
     96    SDL_WriteLE32(io, cvtfreq); /* sample rate */
     97    SDL_WriteLE32(io, avgbytes);        /* average bytes per second */
     98    SDL_WriteLE16(io, blockalign);      /* block align */
     99    SDL_WriteLE16(io, bitsize); /* significant bits per sample */
    100    SDL_WriteLE32(io, 0x61746164);      /* data */
    101    SDL_WriteLE32(io, cvt.len_cvt);     /* size */
    102    SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1);
    103
    104    if (SDL_RWclose(io) == -1) {
    105        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fclose('%s') failed: %s\n", argv[2], SDL_GetError());
    106        SDL_free(cvt.buf);
    107        SDL_FreeWAV(data);
    108        SDL_Quit();
    109        return 8;
    110    }                           /* if */
    111
    112    SDL_free(cvt.buf);
    113    SDL_FreeWAV(data);
    114    SDL_Quit();
    115    return 0;
    116}                               /* main */
    117
    118/* end of resample_test.c ... */