| /* |
| * Copyright (C) 2014 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_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H |
| #define ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H |
| |
| #include <tinyalsa/asoundlib.h> |
| |
| #include "alsa_device_profile.h" |
| |
| typedef struct { |
| alsa_device_profile* profile; |
| |
| struct pcm_config alsa_config; |
| |
| struct pcm * pcm; |
| |
| size_t frame_size; /* valid after proxy_prepare(), the frame size in bytes */ |
| uint64_t transferred; /* the total frames transferred, not cleared on standby */ |
| } alsa_device_proxy; |
| |
| void proxy_prepare(alsa_device_proxy * proxy, alsa_device_profile * profile, |
| struct pcm_config * config); |
| |
| unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy); |
| enum pcm_format proxy_get_format(const alsa_device_proxy * proxy); |
| unsigned proxy_get_channel_count(const alsa_device_proxy * proxy); |
| |
| unsigned int proxy_get_period_size(const alsa_device_proxy * proxy); |
| |
| unsigned proxy_get_latency(const alsa_device_proxy * proxy); |
| |
| int proxy_get_presentation_position(const alsa_device_proxy * proxy, |
| uint64_t *frames, struct timespec *timestamp); |
| |
| int proxy_open(alsa_device_proxy * proxy); |
| void proxy_close(alsa_device_proxy * proxy); |
| |
| int proxy_write(alsa_device_proxy * proxy, const void *data, unsigned int count); |
| int proxy_read(const alsa_device_proxy * proxy, void *data, unsigned int count); |
| |
| #endif /* ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H */ |