diff options
Diffstat (limited to 'services/audioflinger/AudioMixer.h')
| -rw-r--r-- | services/audioflinger/AudioMixer.h | 128 |
1 files changed, 17 insertions, 111 deletions
diff --git a/services/audioflinger/AudioMixer.h b/services/audioflinger/AudioMixer.h index 381036b..e27a0d1 100644 --- a/services/audioflinger/AudioMixer.h +++ b/services/audioflinger/AudioMixer.h @@ -29,6 +29,7 @@ #include <utils/threads.h> #include "AudioResampler.h" +#include "BufferProviders.h" // FIXME This is actually unity gain, which might not be max in future, expressed in U.12 #define MAX_GAIN_INT AudioMixer::UNITY_GAIN_INT @@ -72,6 +73,7 @@ public: RESAMPLE = 0x3001, RAMP_VOLUME = 0x3002, // ramp to new volume VOLUME = 0x3003, // don't ramp + TIMESTRETCH = 0x3004, // set Parameter names // for target TRACK @@ -99,6 +101,9 @@ public: VOLUME0 = 0x4200, VOLUME1 = 0x4201, AUXLEVEL = 0x4210, + // for target TIMESTRETCH + PLAYBACK_RATE = 0x4300, // Configure timestretch on this track name; + // parameter 'value' is a pointer to the new playback rate. }; @@ -159,7 +164,6 @@ private: struct state_t; struct track_t; - class CopyBufferProvider; typedef void (*hook_t)(track_t* t, int32_t* output, size_t numOutFrames, int32_t* temp, int32_t* aux); @@ -214,6 +218,9 @@ private: /* Buffer providers are constructed to translate the track input data as needed. * + * TODO: perhaps make a single PlaybackConverterProvider class to move + * all pre-mixer track buffer conversions outside the AudioMixer class. + * * 1) mInputBufferProvider: The AudioTrack buffer provider. * 2) mReformatBufferProvider: If not NULL, performs the audio reformat to * match either mMixerInFormat or mDownmixRequiresFormat, if the downmixer @@ -223,13 +230,14 @@ private: * the number of channels required by the mixer sink. * 4) mPostDownmixReformatBufferProvider: If not NULL, performs reformatting from * the downmixer requirements to the mixer engine input requirements. + * 5) mTimestretchBufferProvider: Adds timestretching for playback rate */ AudioBufferProvider* mInputBufferProvider; // externally provided buffer provider. - CopyBufferProvider* mReformatBufferProvider; // provider wrapper for reformatting. - CopyBufferProvider* downmixerBufferProvider; // wrapper for channel conversion. - CopyBufferProvider* mPostDownmixReformatBufferProvider; + PassthruBufferProvider* mReformatBufferProvider; // provider wrapper for reformatting. + PassthruBufferProvider* downmixerBufferProvider; // wrapper for channel conversion. + PassthruBufferProvider* mPostDownmixReformatBufferProvider; + PassthruBufferProvider* mTimestretchBufferProvider; - // 16-byte boundary int32_t sessionId; audio_format_t mMixerFormat; // output mix format: AUDIO_FORMAT_PCM_(FLOAT|16_BIT) @@ -251,6 +259,9 @@ private: audio_channel_mask_t mMixerChannelMask; uint32_t mMixerChannelCount; + float mSpeed; + float mPitch; + bool needsRamp() { return (volumeInc[0] | volumeInc[1] | auxInc) != 0; } bool setResampler(uint32_t trackSampleRate, uint32_t devSampleRate); bool doesResample() const { return resampler != NULL; } @@ -263,6 +274,7 @@ private: void unprepareForDownmix(); status_t prepareForReformat(); void unprepareForReformat(); + bool setPlaybackRate(float speed, float pitch); void reconfigureBufferProviders(); }; @@ -282,112 +294,6 @@ private: track_t tracks[MAX_NUM_TRACKS] __attribute__((aligned(32))); }; - // Base AudioBufferProvider class used for DownMixerBufferProvider, RemixBufferProvider, - // and ReformatBufferProvider. - // It handles a private buffer for use in converting format or channel masks from the - // input data to a form acceptable by the mixer. - // TODO: Make a ResamplerBufferProvider when integers are entirely removed from the - // processing pipeline. - class CopyBufferProvider : public AudioBufferProvider { - public: - // Use a private buffer of bufferFrameCount frames (each frame is outputFrameSize bytes). - // If bufferFrameCount is 0, no private buffer is created and in-place modification of - // the upstream buffer provider's buffers is performed by copyFrames(). - CopyBufferProvider(size_t inputFrameSize, size_t outputFrameSize, - size_t bufferFrameCount); - virtual ~CopyBufferProvider(); - - // Overrides AudioBufferProvider methods - virtual status_t getNextBuffer(Buffer* buffer, int64_t pts); - virtual void releaseBuffer(Buffer* buffer); - - // Other public methods - - // call this to release the buffer to the upstream provider. - // treat it as an audio discontinuity for future samples. - virtual void reset(); - - // this function should be supplied by the derived class. It converts - // #frames in the *src pointer to the *dst pointer. It is public because - // some providers will allow this to work on arbitrary buffers outside - // of the internal buffers. - virtual void copyFrames(void *dst, const void *src, size_t frames) = 0; - - // set the upstream buffer provider. Consider calling "reset" before this function. - void setBufferProvider(AudioBufferProvider *p) { - mTrackBufferProvider = p; - } - - protected: - AudioBufferProvider* mTrackBufferProvider; - const size_t mInputFrameSize; - const size_t mOutputFrameSize; - private: - AudioBufferProvider::Buffer mBuffer; - const size_t mLocalBufferFrameCount; - void* mLocalBufferData; - size_t mConsumed; - }; - - // DownmixerBufferProvider wraps a track AudioBufferProvider to provide - // position dependent downmixing by an Audio Effect. - class DownmixerBufferProvider : public CopyBufferProvider { - public: - DownmixerBufferProvider(audio_channel_mask_t inputChannelMask, - audio_channel_mask_t outputChannelMask, audio_format_t format, - uint32_t sampleRate, int32_t sessionId, size_t bufferFrameCount); - virtual ~DownmixerBufferProvider(); - virtual void copyFrames(void *dst, const void *src, size_t frames); - bool isValid() const { return mDownmixHandle != NULL; } - - static status_t init(); - static bool isMultichannelCapable() { return sIsMultichannelCapable; } - - protected: - effect_handle_t mDownmixHandle; - effect_config_t mDownmixConfig; - - // effect descriptor for the downmixer used by the mixer - static effect_descriptor_t sDwnmFxDesc; - // indicates whether a downmix effect has been found and is usable by this mixer - static bool sIsMultichannelCapable; - // FIXME: should we allow effects outside of the framework? - // We need to here. A special ioId that must be <= -2 so it does not map to a session. - static const int32_t SESSION_ID_INVALID_AND_IGNORED = -2; - }; - - // RemixBufferProvider wraps a track AudioBufferProvider to perform an - // upmix or downmix to the proper channel count and mask. - class RemixBufferProvider : public CopyBufferProvider { - public: - RemixBufferProvider(audio_channel_mask_t inputChannelMask, - audio_channel_mask_t outputChannelMask, audio_format_t format, - size_t bufferFrameCount); - virtual void copyFrames(void *dst, const void *src, size_t frames); - - protected: - const audio_format_t mFormat; - const size_t mSampleSize; - const size_t mInputChannels; - const size_t mOutputChannels; - int8_t mIdxAry[sizeof(uint32_t)*8]; // 32 bits => channel indices - }; - - // ReformatBufferProvider wraps a track AudioBufferProvider to convert the input data - // to an acceptable mixer input format type. - class ReformatBufferProvider : public CopyBufferProvider { - public: - ReformatBufferProvider(int32_t channels, - audio_format_t inputFormat, audio_format_t outputFormat, - size_t bufferFrameCount); - virtual void copyFrames(void *dst, const void *src, size_t frames); - - protected: - const int32_t mChannels; - const audio_format_t mInputFormat; - const audio_format_t mOutputFormat; - }; - // bitmask of allocated track names, where bit 0 corresponds to TRACK0 etc. uint32_t mTrackNames; |