diff options
Diffstat (limited to 'services/audioflinger/AudioMixer.h')
| -rw-r--r-- | services/audioflinger/AudioMixer.h | 174 |
1 files changed, 50 insertions, 124 deletions
diff --git a/services/audioflinger/AudioMixer.h b/services/audioflinger/AudioMixer.h index f4f142b..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. }; @@ -127,10 +132,16 @@ public: size_t getUnreleasedFrames(int name) const; static inline bool isValidPcmTrackFormat(audio_format_t format) { - return format == AUDIO_FORMAT_PCM_16_BIT || - format == AUDIO_FORMAT_PCM_24_BIT_PACKED || - format == AUDIO_FORMAT_PCM_32_BIT || - format == AUDIO_FORMAT_PCM_FLOAT; + switch (format) { + case AUDIO_FORMAT_PCM_8_BIT: + case AUDIO_FORMAT_PCM_16_BIT: + case AUDIO_FORMAT_PCM_24_BIT_PACKED: + case AUDIO_FORMAT_PCM_32_BIT: + case AUDIO_FORMAT_PCM_FLOAT: + return true; + default: + return false; + } } private: @@ -153,7 +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); @@ -205,17 +215,38 @@ private: int32_t* auxBuffer; // 16-byte boundary + + /* 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 + * requires reformat. For example, it may convert floating point input to + * PCM_16_bit if that's required by the downmixer. + * 3) downmixerBufferProvider: If not NULL, performs the channel remixing to match + * 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. + PassthruBufferProvider* mReformatBufferProvider; // provider wrapper for reformatting. + PassthruBufferProvider* downmixerBufferProvider; // wrapper for channel conversion. + PassthruBufferProvider* mPostDownmixReformatBufferProvider; + PassthruBufferProvider* mTimestretchBufferProvider; int32_t sessionId; - // 16-byte boundary audio_format_t mMixerFormat; // output mix format: AUDIO_FORMAT_PCM_(FLOAT|16_BIT) audio_format_t mFormat; // input track format audio_format_t mMixerInFormat; // mix internal format AUDIO_FORMAT_PCM_(FLOAT|16_BIT) // each track must be converted to this format. + audio_format_t mDownmixRequiresFormat; // required downmixer format + // AUDIO_FORMAT_PCM_16_BIT if 16 bit necessary + // AUDIO_FORMAT_INVALID if no required format float mVolume[MAX_NUM_VOLUMES]; // floating point set volume float mPrevVolume[MAX_NUM_VOLUMES]; // floating point previous volume @@ -225,10 +256,12 @@ private: float mPrevAuxLevel; // floating point prev aux level float mAuxInc; // floating point aux increment - // 16-byte boundary 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; } @@ -236,6 +269,13 @@ private: void adjustVolumeRamp(bool aux, bool useFloat = false); size_t getUnreleasedFrames() const { return resampler != NULL ? resampler->getUnreleasedFrames() : 0; }; + + status_t prepareForDownmix(); + void unprepareForDownmix(); + status_t prepareForReformat(); + void unprepareForReformat(); + bool setPlaybackRate(float speed, float pitch); + void reconfigureBufferProviders(); }; typedef void (*process_hook_t)(state_t* state, int64_t pts); @@ -254,112 +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; @@ -382,14 +316,6 @@ private: bool setChannelMasks(int name, audio_channel_mask_t trackChannelMask, audio_channel_mask_t mixerChannelMask); - // TODO: remove unused trackName/trackNum from functions below. - static status_t initTrackDownmix(track_t* pTrack, int trackName); - static status_t prepareTrackForDownmix(track_t* pTrack, int trackNum); - static void unprepareTrackForDownmix(track_t* pTrack, int trackName); - static status_t prepareTrackForReformat(track_t* pTrack, int trackNum); - static void unprepareTrackForReformat(track_t* pTrack, int trackName); - static void reconfigureBufferProviders(track_t* pTrack); - static void track__genericResample(track_t* t, int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux); static void track__nop(track_t* t, int32_t* out, size_t numFrames, int32_t* temp, int32_t* aux); @@ -465,6 +391,6 @@ private: }; // ---------------------------------------------------------------------------- -}; // namespace android +} // namespace android #endif // ANDROID_AUDIO_MIXER_H |