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| author | Ralph Giles <giles@mozilla.com> | 2012-03-22 13:29:04 -0700 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2012-04-02 11:21:41 -0400 |
| commit | f40285212c1423b056563c1ca0655e6e59a00016 (patch) | |
| tree | e61199fecf9178b968271ff0370c3519017febe5 /include | |
| parent | 5f6e472c91fb0a4a6b467f1b3c2d508b919fc9d5 (diff) | |
| download | libopus-f40285212c1423b056563c1ca0655e6e59a00016.tar.gz | |
Improve decoder_create documentation.
The parameter descriptions look like they were copied
from encoder_create. Update them for the decode side
and repeat the clarifications about what sample rates
are allowed and what they mean.
Diffstat (limited to 'include')
| -rw-r--r-- | include/opus.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/include/opus.h b/include/opus.h index bd15b853..adf7548b 100644 --- a/include/opus.h +++ b/include/opus.h @@ -333,9 +333,17 @@ typedef struct OpusDecoder OpusDecoder; OPUS_EXPORT int opus_decoder_get_size(int channels); /** Allocates and initializes a decoder state. - * @param [in] Fs <tt>opus_int32</tt>: Sampling rate of input signal (Hz) - * @param [in] channels <tt>int</tt>: Number of channels (1/2) in input signal + * @param [in] Fs <tt>opus_int32</tt>: Sample rate to decode at (Hz) + * @param [in] channels <tt>int</tt>: Number of channels (1/2) to decode * @param [out] error <tt>int*</tt>: OPUS_OK Success or @ref errorcodes + * + * Internally Opus stores data at 48000 Hz, so that should be the default + * value for Fs. However, the decoder can efficiently decode to buffers + * at 8, 12, 16, and 24 kHz so if for some reason the caller cannot use + * data at the full sample rate, or knows the compressed data doesn't + * use the full frequency range, it can request decoding at a reduced + * rate. Likewise, the decoder is capable of filling in either mono or + * interleaved stereo pcm buffers, at the caller's request. */ OPUS_EXPORT OpusDecoder *opus_decoder_create( opus_int32 Fs, @@ -348,8 +356,8 @@ OPUS_EXPORT OpusDecoder *opus_decoder_create( * This is intended for applications which use their own allocator instead of malloc. @see opus_decoder_create,opus_decoder_get_size * To reset a previously initialized state use the OPUS_RESET_STATE CTL. * @param [in] st <tt>OpusDecoder*</tt>: Decoder state. - * @param [in] Fs <tt>opus_int32</tt>: Sampling rate of input signal (Hz) - * @param [in] channels <tt>int</tt>: Number of channels (1/2) in input signal + * @param [in] Fs <tt>opus_int32</tt>: Sampling rate to decode to (Hz) + * @param [in] channels <tt>int</tt>: Number of channels (1/2) to decode * @retval OPUS_OK Success or @ref errorcodes */ OPUS_EXPORT int opus_decoder_init( |