1 /* 2 * Copyright (C) 2018 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 AUDIO_HW_H 18 #define AUDIO_HW_H 19 20 #include <pthread.h> 21 22 #include <cutils/hashmap.h> 23 #include <hardware/audio.h> 24 #include <tinyalsa/asoundlib.h> 25 26 #include "audio_vbuffer.h" 27 28 struct generic_audio_device { 29 struct audio_hw_device device; // Constant after init 30 pthread_mutex_t lock; 31 unsigned int last_patch_id; // Protected by this->lock 32 bool master_mute; // Protected by this->lock 33 bool mic_mute; // Protected by this->lock 34 struct mixer *mixer; // Protected by this->lock 35 Hashmap *out_bus_stream_map; // Extended field. Constant after init 36 }; 37 38 enum output_channel_enable { 39 LEFT_CHANNEL = 1, 40 RIGHT_CHANNEL = 1 << 1, 41 BOTH_CHANNELS = LEFT_CHANNEL | RIGHT_CHANNEL 42 }; 43 44 struct generic_stream_out { 45 struct audio_stream_out stream; // Constant after init 46 pthread_mutex_t lock; 47 struct generic_audio_device *dev; // Constant after init 48 audio_devices_t device; // Protected by this->lock 49 struct audio_config req_config; // Constant after init 50 struct pcm_config pcm_config; // Constant after init 51 audio_vbuffer_t buffer; // Constant after init 52 const char *bus_address; // Extended field. Constant after init 53 struct audio_gain gain_stage; // Constant after init 54 float amplitude_ratio; // Protected by this->lock 55 enum output_channel_enable enabled_channels; // Constant after init 56 57 // Time & Position Keeping 58 bool standby; // Protected by this->lock 59 uint64_t underrun_position; // Protected by this->lock 60 struct timespec underrun_time; // Protected by this->lock 61 uint64_t last_write_time_us; // Protected by this->lock 62 uint64_t frames_total_buffered; // Protected by this->lock 63 uint64_t frames_written; // Protected by this->lock 64 uint64_t frames_rendered; // Protected by this->lock 65 66 // Worker 67 pthread_t worker_thread; // Constant after init 68 pthread_cond_t worker_wake; // Protected by this->lock 69 bool worker_standby; // Protected by this->lock 70 bool worker_exit; // Protected by this->lock 71 }; 72 73 struct generic_stream_in { 74 struct audio_stream_in stream; // Constant after init 75 pthread_mutex_t lock; 76 struct generic_audio_device *dev; // Constant after init 77 audio_devices_t device; // Protected by this->lock 78 struct audio_config req_config; // Constant after init 79 struct pcm *pcm; // Protected by this->lock 80 struct pcm_config pcm_config; // Constant after init 81 int16_t *stereo_to_mono_buf; // Protected by this->lock 82 size_t stereo_to_mono_buf_size; // Protected by this->lock 83 audio_vbuffer_t buffer; // Protected by this->lock 84 const char *bus_address; // Extended field. Constant after init 85 86 // Time & Position Keeping 87 bool standby; // Protected by this->lock 88 int64_t standby_position; // Protected by this->lock 89 struct timespec standby_exit_time; // Protected by this->lock 90 int64_t standby_frames_read; // Protected by this->lock 91 92 // Worker 93 pthread_t worker_thread; // Constant after init 94 pthread_cond_t worker_wake; // Protected by this->lock 95 bool worker_standby; // Protected by this->lock 96 bool worker_exit; // Protected by this->lock 97 }; 98 99 #endif // AUDIO_HW_H 100