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Differences between revisions 12 and 14 (spanning 2 versions)
Revision 12 as of 2012-06-04 17:21:19
Size: 1870
Editor: ChrisBush
Comment: Out variable audio_len value is not pointer (from Feedback)
Revision 14 as of 2013-08-08 05:14:52
Size: 2223
Editor: RyanGordon
Comment: style change
Deletions are marked like this. Additions are marked like this.
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||'''src'''||the data source for the wave file; see [[SDL_RWFromMem]]() for more info|| ||'''src'''||the data source for the wave file; see [[CategoryIO|the RWOPS interface]]() for more info||
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||'''spec'''||,,specifies ,,the target audio format; see [[SDL_AudioSpec]] for more info ''-or-'' an [[SDL_AudioSpec]] structure representing the desired output format||
||'''audio_buf'''||,,specifies ,,the audio buffer||
||'''audio_len'''||,,specifies ,,the length of the audio buffer in bytes||
||'''spec'''||an [[SDL_AudioSpec]] structure representing the desired output format||
||'''audio_buf'''||the audio buffer||
||'''audio_len'''||the length of the audio buffer in bytes||
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This function, if successfully called, returns a pointer to an [[SDL_AudioSpec]] structure filled with the audio data format of the wave source data. '''audio_buf''' is filled with a pointer to a malloc()'d buffer containing the audio data, and '''audio_len''' is filled with the length of that audio buffer in bytes. This function, if successfully called, returns a pointer to an [[SDL_AudioSpec]] structure filled with the audio data format of the wave source data. '''audio_buf''' is filled with a pointer to an allocated buffer containing the audio data, and '''audio_len''' is filled with the length of that audio buffer in bytes.
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This function returns NULL if the wave file cannot be opened, uses an unknown data format, or is corrupt; call [[SDL_GetError]]() for more information.   This function returns NULL if the wave file cannot be opened, uses an unknown data format, or is corrupt; call [[SDL_GetError]]() for more information.

When the application is done with the data returned in '''audio_buf''', it should call [[SDL_FreeWAV]]() to dispose of it.
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You can add your code example here extern SDL_RWops *myRWops;
SDL_AudioSpec wav_spec;
Uint32 wav_length;
Uint8 *wav_buffer;

/* Load the WAV */
if (SDL_LoadWAV_RW(myRWops, 1, &wav_spec, &wav_buffer, &wav_length) == NULL) {
    fprintf(stderr, "Could not open test.wav: %s\n", SDL_GetError());
} else {
    /* Do stuff with the WAV data, and then... */
    SDL_FreeWAV(wav_buffer);
}

SDL_LoadWAV_RW

Use this function to load a WAVE from the data source, automatically freeing that source if freesrc is non-zero.

Syntax

SDL_AudioSpec* SDL_LoadWAV_RW(SDL_RWops*     src,
                              int            freesrc,
                              SDL_AudioSpec* spec,
                              Uint8**        audio_buf,
                              Uint32*        audio_len)

Function Parameters

src

the data source for the wave file; see the RWOPS interface() for more info

freesrc

non-zero to automatically free the data source

spec

an SDL_AudioSpec structure representing the desired output format

audio_buf

the audio buffer

audio_len

the length of the audio buffer in bytes

Return Value

This function, if successfully called, returns a pointer to an SDL_AudioSpec structure filled with the audio data format of the wave source data. audio_buf is filled with a pointer to an allocated buffer containing the audio data, and audio_len is filled with the length of that audio buffer in bytes.

This function returns NULL if the wave file cannot be opened, uses an unknown data format, or is corrupt; call SDL_GetError() for more information.

When the application is done with the data returned in audio_buf, it should call SDL_FreeWAV() to dispose of it.

Code Examples

extern SDL_RWops *myRWops;
SDL_AudioSpec wav_spec;
Uint32 wav_length;
Uint8 *wav_buffer;

/* Load the WAV */
if (SDL_LoadWAV_RW(myRWops, 1, &wav_spec, &wav_buffer, &wav_length) == NULL) {
    fprintf(stderr, "Could not open test.wav: %s\n", SDL_GetError());
} else {
    /* Do stuff with the WAV data, and then... */
    SDL_FreeWAV(wav_buffer);
}

Remarks

Currently raw and MS-ADPCM WAVE files are supported.

You need to free the audio buffer with SDL_FreeWAV() when you are done with it.


CategoryAPI, CategoryAudio

None: SDL_LoadWAV_RW (last edited 2018-10-30 02:25:29 by RyanGordon)

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