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Diffstat (limited to 'libs/audioflinger/AudioMixer.h')
| -rw-r--r-- | libs/audioflinger/AudioMixer.h | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/libs/audioflinger/AudioMixer.h b/libs/audioflinger/AudioMixer.h deleted file mode 100644 index 72ca28a..0000000 --- a/libs/audioflinger/AudioMixer.h +++ /dev/null @@ -1,192 +0,0 @@ -/* //device/include/server/AudioFlinger/AudioMixer.h -** -** Copyright 2007, The Android Open Source Project -** -** Licensed under the Apache License, Version 2.0 (the "License"); -** you may not use this file except in compliance with the License. -** You may obtain a copy of the License at -** -** http://www.apache.org/licenses/LICENSE-2.0 -** -** Unless required by applicable law or agreed to in writing, software -** distributed under the License is distributed on an "AS IS" BASIS, -** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -** See the License for the specific language governing permissions and -** limitations under the License. -*/ - -#ifndef ANDROID_AUDIO_MIXER_H -#define ANDROID_AUDIO_MIXER_H - -#include <stdint.h> -#include <sys/types.h> - -#include "AudioBufferProvider.h" -#include "AudioResampler.h" - -namespace android { - -// ---------------------------------------------------------------------------- - -#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true )) -#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false )) - -// ---------------------------------------------------------------------------- - -class AudioMixer -{ -public: - AudioMixer(size_t frameCount, uint32_t sampleRate); - - ~AudioMixer(); - - static const uint32_t MAX_NUM_TRACKS = 32; - static const uint32_t MAX_NUM_CHANNELS = 2; - - static const uint16_t UNITY_GAIN = 0x1000; - - enum { // names - - // track units (32 units) - TRACK0 = 0x1000, - - // enable/disable - MIXING = 0x2000, - - // setParameter targets - TRACK = 0x3000, - RESAMPLE = 0x3001, - RAMP_VOLUME = 0x3002, // ramp to new volume - VOLUME = 0x3003, // don't ramp - - // set Parameter names - // for target TRACK - CHANNEL_COUNT = 0x4000, - FORMAT = 0x4001, - // for TARGET RESAMPLE - SAMPLE_RATE = 0x4100, - // for TARGET VOLUME (8 channels max) - VOLUME0 = 0x4200, - VOLUME1 = 0x4201, - }; - - - int getTrackName(); - void deleteTrackName(int name); - - status_t enable(int name); - status_t disable(int name); - - status_t setActiveTrack(int track); - status_t setParameter(int target, int name, int value); - - status_t setBufferProvider(AudioBufferProvider* bufferProvider); - void process(void* output); - - uint32_t trackNames() const { return mTrackNames; } - -private: - - enum { - NEEDS_CHANNEL_COUNT__MASK = 0x00000003, - NEEDS_FORMAT__MASK = 0x000000F0, - NEEDS_MUTE__MASK = 0x00000100, - NEEDS_RESAMPLE__MASK = 0x00001000, - }; - - enum { - NEEDS_CHANNEL_1 = 0x00000000, - NEEDS_CHANNEL_2 = 0x00000001, - - NEEDS_FORMAT_16 = 0x00000010, - - NEEDS_MUTE_DISABLED = 0x00000000, - NEEDS_MUTE_ENABLED = 0x00000100, - - NEEDS_RESAMPLE_DISABLED = 0x00000000, - NEEDS_RESAMPLE_ENABLED = 0x00001000, - }; - - static inline int32_t applyVolume(int32_t in, int32_t v) { - return in * v; - } - - - struct state_t; - - typedef void (*mix_t)(state_t* state, void* output); - - static const int BLOCKSIZE = 16; // 4 cache lines - - struct track_t { - uint32_t needs; - - union { - int16_t volume[2]; // [0]3.12 fixed point - int32_t volumeRL; - }; - - int32_t prevVolume[2]; - - int32_t volumeInc[2]; - - uint16_t frameCount; - - uint8_t channelCount : 4; - uint8_t enabled : 1; - uint8_t reserved0 : 3; - uint8_t format; - - AudioBufferProvider* bufferProvider; - mutable AudioBufferProvider::Buffer buffer; - - void (*hook)(track_t* t, int32_t* output, size_t numOutFrames, int32_t* temp); - void const* in; // current location in buffer - - AudioResampler* resampler; - uint32_t sampleRate; - - bool setResampler(uint32_t sampleRate, uint32_t devSampleRate); - bool doesResample() const; - void adjustVolumeRamp(); - }; - - // pad to 32-bytes to fill cache line - struct state_t { - uint32_t enabledTracks; - uint32_t needsChanged; - size_t frameCount; - mix_t hook; - int32_t *outputTemp; - int32_t *resampleTemp; - int32_t reserved[2]; - track_t tracks[32]; __attribute__((aligned(32))); - }; - - int mActiveTrack; - uint32_t mTrackNames; - const uint32_t mSampleRate; - - state_t mState __attribute__((aligned(32))); - - void invalidateState(uint32_t mask); - - static void track__genericResample(track_t* t, int32_t* out, size_t numFrames, int32_t* temp); - static void track__nop(track_t* t, int32_t* out, size_t numFrames, int32_t* temp); - static void volumeRampStereo(track_t* t, int32_t* out, size_t frameCount, int32_t* temp); - static void track__16BitsStereo(track_t* t, int32_t* out, size_t numFrames, int32_t* temp); - static void track__16BitsMono(track_t* t, int32_t* out, size_t numFrames, int32_t* temp); - static void ditherAndClamp(int32_t* out, int32_t const *sums, size_t c); - - static void process__validate(state_t* state, void* output); - static void process__nop(state_t* state, void* output); - static void process__genericNoResampling(state_t* state, void* output); - static void process__genericResampling(state_t* state, void* output); - static void process__OneTrack16BitsStereoNoResampling(state_t* state, void* output); - static void process__TwoTracks16BitsStereoNoResampling(state_t* state, void* output); -}; - -// ---------------------------------------------------------------------------- -}; // namespace android - -#endif // ANDROID_AUDIO_MIXER_H |