version 2 showing authors affecting page license.
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SDL_!ConvertAudio |
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!!!SDL_!ConvertAudio |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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EXAMPLES |
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SEE ALSO |
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---- |
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!!NAME |
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SDL_!ConvertAudio- Convert audio data to a desired audio format. |
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!!SYNOPSIS |
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__#include __ |
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__int SDL_!ConvertAudio__(__SDL_AudioCVT |
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*cvt__); |
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!!DESCRIPTION |
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__SDL_!ConvertAudio__ takes one parameter, __cvt__, |
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which was previously initilized. Initilizing a |
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__SDL_AudioCVT__ is a two step process. First of all, the |
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structure must be passed to __SDL_BuildAudioCVT__ along |
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with source and destination format parameters. Secondly, the |
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__cvt__-__buf__ and __cvt__-__len__ |
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fields must be setup. __cvt__-__buf__ should point |
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to the audio data and __cvt__-__len__ should be |
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set to the length of the audio data in bytes. Remember, the |
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length of the buffer pointed to by __buf__ show be |
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__len__*__len_mult__ bytes in length. |
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Once the __SDL_AudioCVT__structure is initilized then we |
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can pass it to __SDL_!ConvertAudio__, which will convert |
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the audio data pointer to by __cvt__-__buf__. If |
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__SDL_!ConvertAudio__ returned __0__ then the |
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conversion was completed successfully, otherwise __-1__ |
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is returned. |
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If the conversion completed successfully then the converted |
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audio data can be read from __cvt__-__buf__. The |
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amount of valid, converted, audio data in the buffer is |
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equal to |
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__cvt__-__len__*__cvt__-__len_ratio__. |
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!!EXAMPLES |
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/* Converting some WAV data to hardware format */ |
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void my_audio_callback(void *userdata, Uint8 *stream, int len); |
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SDL_!AudioSpec *desired, *obtained; |
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SDL_!AudioSpec wav_spec; |
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SDL_AudioCVT wav_cvt; |
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Uint32 wav_len; |
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Uint8 *wav_buf; |
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int ret; |
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/* Allocated audio specs */ |
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desired=(SDL_!AudioSpec *)malloc(sizeof(SDL_!AudioSpec)); |
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obtained=(SDL_!AudioSpec *)malloc(sizeof(SDL_!AudioSpec)); |
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/* Set desired format */ |
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desired- |
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!!SEE ALSO |
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__SDL_BuildAudioCVT__, __SDL_AudioCVT__ |
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---- |
