1 /* 2 * Copyright (c) 2013, The Linux Foundation. All rights reserved. 3 * Not a contribution. 4 * 5 * Copyright (C) 2013 The Android Open Source Project 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 20 #ifndef OFFLOAD_EFFECT_BUNDLE_H 21 #define OFFLOAD_EFFECT_BUNDLE_H 22 23 #include <tinyalsa/asoundlib.h> 24 #include <sound/audio_effects.h> 25 #include "effect_api.h" 26 27 /* Retry for delay for mixer open */ 28 #define RETRY_NUMBER 10 29 #define RETRY_US 500000 30 31 #define MIXER_CARD 0 32 #define SOUND_CARD 0 33 34 extern const struct effect_interface_s effect_interface; 35 36 typedef struct output_context_s output_context_t; 37 typedef struct effect_ops_s effect_ops_t; 38 typedef struct effect_context_s effect_context_t; 39 40 struct output_context_s { 41 /* node in active_outputs_list */ 42 struct listnode outputs_list_node; 43 /* io handle */ 44 audio_io_handle_t handle; 45 /* list of effects attached to this output */ 46 struct listnode effects_list; 47 /* pcm device id */ 48 int pcm_device_id; 49 struct mixer *mixer; 50 struct mixer_ctl *ctl; 51 }; 52 53 /* effect specific operations. 54 * Only the init() and process() operations must be defined. 55 * Others are optional. 56 */ 57 struct effect_ops_s { 58 int (*init)(effect_context_t *context); 59 int (*release)(effect_context_t *context); 60 int (*reset)(effect_context_t *context); 61 int (*enable)(effect_context_t *context); 62 int (*start)(effect_context_t *context, output_context_t *output); 63 int (*stop)(effect_context_t *context, output_context_t *output); 64 int (*disable)(effect_context_t *context); 65 int (*process)(effect_context_t *context, audio_buffer_t *in, audio_buffer_t *out); 66 int (*set_parameter)(effect_context_t *context, effect_param_t *param, uint32_t size); 67 int (*get_parameter)(effect_context_t *context, effect_param_t *param, uint32_t *size); 68 int (*set_device)(effect_context_t *context, uint32_t device); 69 int (*command)(effect_context_t *context, uint32_t cmdCode, uint32_t cmdSize, 70 void *pCmdData, uint32_t *replySize, void *pReplyData); 71 }; 72 73 struct effect_context_s { 74 const struct effect_interface_s *itfe; 75 /* node in created_effects_list */ 76 struct listnode effects_list_node; 77 /* node in output_context_t.effects_list */ 78 struct listnode output_node; 79 effect_config_t config; 80 const effect_descriptor_t *desc; 81 /* io handle of the output the effect is attached to */ 82 audio_io_handle_t out_handle; 83 uint32_t state; 84 bool offload_enabled; 85 effect_ops_t ops; 86 }; 87 88 int set_config(effect_context_t *context, effect_config_t *config); 89 90 bool effect_is_active(effect_context_t *context); 91 92 #endif /* OFFLOAD_EFFECT_BUNDLE_H */ 93