Mercurial > sdl-ios-xcode
annotate test/testresample.c @ 3496:78fc8ea578b2
Joe 2009-11-23 21:31:10 PST
If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions
367 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN
uses
368 * the first three \c dir parameters. The cardinal directions would
be:
369 * - North: 0,-1, 0
370 * - East: -1, 0, 0
371 * - South: 0, 1, 0
372 * - West: 1, 0, 0
typedef struct SDL_HapticDirection
{
Uint8 type; /**< The type of encoding. */
Uint16 dir[3]; /**< The encoded direction. */
} SDL_HapticDirection;
An unsigned int can't store negative values and I don't see an alternate way to
encode them in the docs or source. The best I have been able to come up with is
using a negative magnitude for the effect but this will only get me 2 of the 4
quadrants in the plane for 2d effects. I looked at the win32 and linux
implementations and I believe is is safe to use signed ints in the direction
struct. I am unfamiliar with the darwin haptics API so I don't know if it is
safe.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 27 Nov 2009 19:29:27 +0000 |
| parents | 62d4992e5a92 |
| children |
| rev | line source |
|---|---|
| 3017 | 1 #include <stdio.h> |
| 2 #include "SDL.h" | |
| 3 | |
| 3040 | 4 int |
| 5 main(int argc, char **argv) | |
| 3017 | 6 { |
| 7 SDL_AudioSpec spec; | |
| 8 SDL_AudioCVT cvt; | |
| 9 Uint32 len = 0; | |
| 10 Uint8 *data = NULL; | |
| 11 int cvtfreq = 0; | |
| 12 int bitsize = 0; | |
| 13 int blockalign = 0; | |
| 14 int avgbytes = 0; | |
| 15 SDL_RWops *io = NULL; | |
| 16 | |
| 3040 | 17 if (argc != 4) { |
| 3017 | 18 fprintf(stderr, "USAGE: %s in.wav out.wav newfreq\n", argv[0]); |
| 19 return 1; | |
| 20 } | |
| 21 | |
| 22 cvtfreq = atoi(argv[3]); | |
| 23 | |
| 3040 | 24 if (SDL_Init(SDL_INIT_AUDIO) == -1) { |
| 3017 | 25 fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError()); |
| 26 return 2; | |
| 27 } | |
| 28 | |
| 3040 | 29 if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) { |
| 3017 | 30 fprintf(stderr, "failed to load %s: %s\n", argv[1], SDL_GetError()); |
| 31 SDL_Quit(); | |
| 32 return 3; | |
| 33 } | |
| 34 | |
| 35 if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq, | |
| 3040 | 36 spec.format, spec.channels, cvtfreq) == -1) { |
| 3017 | 37 fprintf(stderr, "failed to build CVT: %s\n", SDL_GetError()); |
| 38 SDL_FreeWAV(data); | |
| 39 SDL_Quit(); | |
| 40 return 4; | |
| 41 } | |
| 42 | |
| 43 cvt.len = len; | |
| 44 cvt.buf = (Uint8 *) malloc(len * cvt.len_mult); | |
| 3040 | 45 if (cvt.buf == NULL) { |
| 3017 | 46 fprintf(stderr, "Out of memory.\n"); |
| 47 SDL_FreeWAV(data); | |
| 48 SDL_Quit(); | |
| 49 return 5; | |
| 50 } | |
| 51 memcpy(cvt.buf, data, len); | |
| 52 | |
| 3040 | 53 if (SDL_ConvertAudio(&cvt) == -1) { |
| 3017 | 54 fprintf(stderr, "Conversion failed: %s\n", SDL_GetError()); |
| 55 free(cvt.buf); | |
| 56 SDL_FreeWAV(data); | |
| 57 SDL_Quit(); | |
| 58 return 6; | |
| 59 } | |
| 60 | |
| 61 /* write out a WAV header... */ | |
| 62 io = SDL_RWFromFile(argv[2], "wb"); | |
| 3040 | 63 if (io == NULL) { |
| 3017 | 64 fprintf(stderr, "fopen('%s') failed: %s\n", argv[2], SDL_GetError()); |
| 65 free(cvt.buf); | |
| 66 SDL_FreeWAV(data); | |
| 67 SDL_Quit(); | |
| 68 return 7; | |
| 69 } | |
| 70 | |
| 71 bitsize = SDL_AUDIO_BITSIZE(spec.format); | |
| 72 blockalign = (bitsize / 8) * spec.channels; | |
| 73 avgbytes = cvtfreq * blockalign; | |
| 74 | |
| 3040 | 75 SDL_WriteLE32(io, 0x46464952); /* RIFF */ |
| 3017 | 76 SDL_WriteLE32(io, len * cvt.len_mult + 36); |
| 3040 | 77 SDL_WriteLE32(io, 0x45564157); /* WAVE */ |
| 78 SDL_WriteLE32(io, 0x20746D66); /* fmt */ | |
| 79 SDL_WriteLE32(io, 16); /* chunk size */ | |
| 80 SDL_WriteLE16(io, 1); /* uncompressed */ | |
| 81 SDL_WriteLE16(io, spec.channels); /* channels */ | |
| 82 SDL_WriteLE32(io, cvtfreq); /* sample rate */ | |
| 83 SDL_WriteLE32(io, avgbytes); /* average bytes per second */ | |
| 84 SDL_WriteLE16(io, blockalign); /* block align */ | |
| 85 SDL_WriteLE16(io, bitsize); /* significant bits per sample */ | |
| 86 SDL_WriteLE32(io, 0x61746164); /* data */ | |
| 87 SDL_WriteLE32(io, cvt.len_cvt); /* size */ | |
|
3018
d706d3170d7d
testresample.c: Write out correct size for resampled buffer.
Ryan C. Gordon <icculus@icculus.org>
parents:
3017
diff
changeset
|
88 SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1); |
| 3017 | 89 |
| 3040 | 90 if (SDL_RWclose(io) == -1) { |
| 3017 | 91 fprintf(stderr, "fclose('%s') failed: %s\n", argv[2], SDL_GetError()); |
| 92 free(cvt.buf); | |
| 93 SDL_FreeWAV(data); | |
| 94 SDL_Quit(); | |
| 95 return 8; | |
| 3040 | 96 } // if |
| 3017 | 97 |
| 98 free(cvt.buf); | |
| 99 SDL_FreeWAV(data); | |
| 100 SDL_Quit(); | |
| 101 return 0; | |
| 3040 | 102 } // main |
| 3017 | 103 |
| 104 // end of resample_test.c ... |