the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here.

Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here. Not 5 or 10 depending on the architecture. More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802
2025-12-21 10:49:12 +00:00 · 2015-02-10 16:28:56 -05:00
commit b88ca1b4a6
1638 changed files with 474135 additions and 0 deletions
--- a/test/testresample.c
+++ b/test/testresample.c
@@ -0,0 +1,118 @@
+/*
+  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely.
+*/
+
+#include "SDL.h"
+
+int
+main(int argc, char **argv)
+{
+    SDL_AudioSpec spec;
+    SDL_AudioCVT cvt;
+    Uint32 len = 0;
+    Uint8 *data = NULL;
+    int cvtfreq = 0;
+    int bitsize = 0;
+    int blockalign = 0;
+    int avgbytes = 0;
+    SDL_RWops *io = NULL;
+
+	/* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    if (argc != 4) {
+        SDL_Log("USAGE: %s in.wav out.wav newfreq\n", argv[0]);
+        return 1;
+    }
+
+    cvtfreq = SDL_atoi(argv[3]);
+
+    if (SDL_Init(SDL_INIT_AUDIO) == -1) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
+        return 2;
+    }
+
+    if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s\n", argv[1], SDL_GetError());
+        SDL_Quit();
+        return 3;
+    }
+
+    if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq,
+                          spec.format, spec.channels, cvtfreq) == -1) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to build CVT: %s\n", SDL_GetError());
+        SDL_FreeWAV(data);
+        SDL_Quit();
+        return 4;
+    }
+
+    cvt.len = len;
+    cvt.buf = (Uint8 *) SDL_malloc(len * cvt.len_mult);
+    if (cvt.buf == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory.\n");
+        SDL_FreeWAV(data);
+        SDL_Quit();
+        return 5;
+    }
+    SDL_memcpy(cvt.buf, data, len);
+
+    if (SDL_ConvertAudio(&cvt) == -1) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Conversion failed: %s\n", SDL_GetError());
+        SDL_free(cvt.buf);
+        SDL_FreeWAV(data);
+        SDL_Quit();
+        return 6;
+    }
+
+    /* write out a WAV header... */
+    io = SDL_RWFromFile(argv[2], "wb");
+    if (io == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fopen('%s') failed: %s\n", argv[2], SDL_GetError());
+        SDL_free(cvt.buf);
+        SDL_FreeWAV(data);
+        SDL_Quit();
+        return 7;
+    }
+
+    bitsize = SDL_AUDIO_BITSIZE(spec.format);
+    blockalign = (bitsize / 8) * spec.channels;
+    avgbytes = cvtfreq * blockalign;
+
+    SDL_WriteLE32(io, 0x46464952);      /* RIFF */
+    SDL_WriteLE32(io, len * cvt.len_mult + 36);
+    SDL_WriteLE32(io, 0x45564157);      /* WAVE */
+    SDL_WriteLE32(io, 0x20746D66);      /* fmt */
+    SDL_WriteLE32(io, 16);      /* chunk size */
+    SDL_WriteLE16(io, 1);       /* uncompressed */
+    SDL_WriteLE16(io, spec.channels);   /* channels */
+    SDL_WriteLE32(io, cvtfreq); /* sample rate */
+    SDL_WriteLE32(io, avgbytes);        /* average bytes per second */
+    SDL_WriteLE16(io, blockalign);      /* block align */
+    SDL_WriteLE16(io, bitsize); /* significant bits per sample */
+    SDL_WriteLE32(io, 0x61746164);      /* data */
+    SDL_WriteLE32(io, cvt.len_cvt);     /* size */
+    SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1);
+
+    if (SDL_RWclose(io) == -1) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fclose('%s') failed: %s\n", argv[2], SDL_GetError());
+        SDL_free(cvt.buf);
+        SDL_FreeWAV(data);
+        SDL_Quit();
+        return 8;
+    }                           /* if */
+
+    SDL_free(cvt.buf);
+    SDL_FreeWAV(data);
+    SDL_Quit();
+    return 0;
+}                               /* main */
+
+/* end of resample_test.c ... */