| Jean-Michel Trivi | 04c1e53 | 2012-03-02 10:59:56 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_EFFECTDOWNMIX_H_ |
| 18 | #define ANDROID_EFFECTDOWNMIX_H_ |
| 19 | |
| 20 | #include <audio_effects/effect_downmix.h> |
| 21 | #include <audio_utils/primitives.h> |
| 22 | #include <system/audio.h> |
| 23 | |
| 24 | /*------------------------------------ |
| 25 | * definitions |
| 26 | *------------------------------------ |
| 27 | */ |
| 28 | |
| 29 | #define DOWNMIX_OUTPUT_CHANNELS AUDIO_CHANNEL_OUT_STEREO |
| 30 | |
| 31 | typedef enum { |
| 32 | DOWNMIX_STATE_UNINITIALIZED, |
| 33 | DOWNMIX_STATE_INITIALIZED, |
| 34 | DOWNMIX_STATE_ACTIVE, |
| 35 | } downmix_state_t; |
| 36 | |
| 37 | /* parameters for each downmixer */ |
| 38 | typedef struct { |
| 39 | downmix_state_t state; |
| 40 | downmix_type_t type; |
| 41 | bool apply_volume_correction; |
| 42 | uint8_t input_channel_count; |
| 43 | } downmix_object_t; |
| 44 | |
| 45 | |
| 46 | typedef struct downmix_module_s { |
| 47 | const struct effect_interface_s *itfe; |
| 48 | effect_config_t config; |
| 49 | downmix_object_t context; |
| 50 | } downmix_module_t; |
| 51 | |
| 52 | |
| 53 | /*------------------------------------ |
| 54 | * Effect API |
| 55 | *------------------------------------ |
| 56 | */ |
| 57 | int32_t DownmixLib_QueryNumberEffects(uint32_t *pNumEffects); |
| 58 | int32_t DownmixLib_QueryEffect(uint32_t index, |
| 59 | effect_descriptor_t *pDescriptor); |
| 60 | int32_t DownmixLib_Create(const effect_uuid_t *uuid, |
| 61 | int32_t sessionId, |
| 62 | int32_t ioId, |
| 63 | effect_handle_t *pHandle); |
| 64 | int32_t DownmixLib_Release(effect_handle_t handle); |
| 65 | int32_t DownmixLib_GetDescriptor(const effect_uuid_t *uuid, |
| 66 | effect_descriptor_t *pDescriptor); |
| 67 | |
| 68 | static int Downmix_Process(effect_handle_t self, |
| 69 | audio_buffer_t *inBuffer, |
| 70 | audio_buffer_t *outBuffer); |
| 71 | static int Downmix_Command(effect_handle_t self, |
| 72 | uint32_t cmdCode, |
| 73 | uint32_t cmdSize, |
| 74 | void *pCmdData, |
| 75 | uint32_t *replySize, |
| 76 | void *pReplyData); |
| 77 | static int Downmix_GetDescriptor(effect_handle_t self, |
| 78 | effect_descriptor_t *pDescriptor); |
| 79 | |
| 80 | |
| 81 | /*------------------------------------ |
| 82 | * internal functions |
| 83 | *------------------------------------ |
| 84 | */ |
| 85 | int Downmix_Init(downmix_module_t *pDwmModule); |
| 86 | int Downmix_Configure(downmix_module_t *pDwmModule, effect_config_t *pConfig, bool init); |
| 87 | int Downmix_Reset(downmix_object_t *pDownmixer, bool init); |
| 88 | int Downmix_setParameter(downmix_object_t *pDownmixer, int32_t param, size_t size, void *pValue); |
| 89 | int Downmix_getParameter(downmix_object_t *pDownmixer, int32_t param, size_t *pSize, void *pValue); |
| 90 | |
| 91 | void Downmix_foldFromQuad(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate); |
| 92 | void Downmix_foldFromSurround(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate); |
| 93 | void Downmix_foldFrom5Point1(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate); |
| 94 | void Downmix_foldFrom7Point1(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate); |
| 95 | |
| 96 | #endif /*ANDROID_EFFECTDOWNMIX_H_*/ |