diff options
Diffstat (limited to 'services/audioflinger/AudioResampler.h')
| -rw-r--r-- | services/audioflinger/AudioResampler.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/services/audioflinger/AudioResampler.h b/services/audioflinger/AudioResampler.h index 863614a..a8e3e6f 100644 --- a/services/audioflinger/AudioResampler.h +++ b/services/audioflinger/AudioResampler.h @@ -67,12 +67,18 @@ public: // Resample int16_t samples from provider and accumulate into 'out'. // A mono provider delivers a sequence of samples. // A stereo provider delivers a sequence of interleaved pairs of samples. - // Multi-channel providers are not supported. + // // In either case, 'out' holds interleaved pairs of fixed-point Q4.27. // That is, for a mono provider, there is an implicit up-channeling. // Since this method accumulates, the caller is responsible for clearing 'out' initially. - // FIXME assumes provider is always successful; it should return the actual frame count. - virtual void resample(int32_t* out, size_t outFrameCount, + // + // For a float resampler, 'out' holds interleaved pairs of float samples. + // + // Multichannel interleaved frames for n > 2 is supported for quality DYN_LOW_QUALITY, + // DYN_MED_QUALITY, and DYN_HIGH_QUALITY. + // + // Returns the number of frames resampled into the out buffer. + virtual size_t resample(int32_t* out, size_t outFrameCount, AudioBufferProvider* provider) = 0; virtual void reset(); |