Mercurial > sdl-ios-xcode
view docs/man3/SDL_LoadWAV.3 @ 2661:d38309be5178 gsoc2008_audio_resampling
The windowed sinc filter generation code seems to be working fine. The FIR filtering code is also now working reasonably well. Occasionally the FIR filter will pop, but setting the normalization factor lower seems to help this. I suspect the problem is in the fixed point multiply/add. I also have a hunch the zero stuffing/sample discarding code is not correct, and I'll look at that soon to get it sorted out.
author | Aaron Wishnick <schnarf@gmail.com> |
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date | Wed, 02 Jul 2008 08:04:50 +0000 |
parents | 546f7c1eb755 |
children | 1238da4a7112 |
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.TH "SDL_LoadWAV" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference" .SH "NAME" SDL_LoadWAV \- Load a WAVE file .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBSDL_AudioSpec *\fBSDL_LoadWAV\fP\fR(\fBconst char *file, SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len\fR); .SH "DESCRIPTION" .PP \fBSDL_LoadWAV\fP This function loads a WAVE \fBfile\fR into memory\&. .PP If this function succeeds, it returns the given \fI\fBSDL_AudioSpec\fP\fR, filled with the audio data format of the wave data, and sets \fBaudio_buf\fR to a \fBmalloc\fP\&'d buffer containing the audio data, and sets \fBaudio_len\fR to the length of that audio buffer, in bytes\&. You need to free the audio buffer with \fI\fBSDL_FreeWAV\fP\fR when you are done with it\&. .PP This function returns \fBNULL\fP and sets the SDL error message if the wave file cannot be opened, uses an unknown data format, or is corrupt\&. Currently raw, MS-ADPCM and IMA-ADPCM WAVE files are supported\&. .SH "EXAMPLE" .PP .nf \f(CWSDL_AudioSpec wav_spec; Uint32 wav_length; Uint8 *wav_buffer; /* Load the WAV */ if( SDL_LoadWAV("test\&.wav", &wav_spec, &wav_buffer, &wav_length) == NULL ){ fprintf(stderr, "Could not open test\&.wav: %s ", SDL_GetError()); exit(-1); } \&. \&. \&. /* Do stuff with the WAV */ \&. \&. /* Free It */ SDL_FreeWAV(wav_buffer);\fR .fi .PP .SH "SEE ALSO" .PP \fI\fBSDL_AudioSpec\fR\fR, \fI\fBSDL_OpenAudio\fP\fR, \fI\fBSDL_FreeWAV\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58