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libvorbis documentation

libvorbis version 1.3.2 - 20101101

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vorbis_analysis_buffer

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declared in "vorbis/codec.h";

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This fuction requests a buffer array for delivering audio to the cannam@86: encoder for compression.

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The Vorbis encoder expects the caller to write audio data as cannam@86: non-interleaved floating point samples into its internal buffers. cannam@86:

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cannam@86: The general procedure is to call this function with the number of samples cannam@86: you have available. The encoder will arrange for that much internal storage cannam@86: and return an array of buffer pointers, one for each channel of audio. cannam@86: The caller must then write the audio samples into those buffers, as cannam@86: float values, and finally call vorbis_analysis_wrote() to tell the cannam@86: encoder the data is available for analysis. cannam@86:

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cannam@86: extern float  **vorbis_analysis_buffer(vorbis_dsp_state *v,int vals);
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Parameters

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v: Pointer to the vorbis_dsp_state representing the encoder.
vals: Number of samples to provide space for in the returned buffer. 1024 is a reasonable choice.

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Return Values

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Returns an array of floating point buffers which can accept data. cannam@86: A (**float) where the first index is the channel, and the second is cannam@86: the sample index.

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copyright © 2010 Xiph.Org	Ogg Vorbis
libvorbis documentation	libvorbis version 1.3.2 - 20101101

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