2 * Copyright (C) 2013 Intel Corporation
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
23 #include <hardware/audio.h>
24 #include <hardware/hardware.h>
28 struct a2dp_audio_dev {
29 struct audio_hw_device dev;
30 struct audio_stream_out *out;
33 static ssize_t out_write(struct audio_stream_out *stream, const void *buffer,
40 static uint32_t out_get_sample_rate(const struct audio_stream *stream)
46 static int out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
52 static size_t out_get_buffer_size(const struct audio_stream *stream)
58 static uint32_t out_get_channels(const struct audio_stream *stream)
64 static audio_format_t out_get_format(const struct audio_stream *stream)
70 static int out_set_format(struct audio_stream *stream, audio_format_t format)
76 static int out_standby(struct audio_stream *stream)
82 static int out_dump(const struct audio_stream *stream, int fd)
88 static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
94 static char *out_get_parameters(const struct audio_stream *stream,
101 static uint32_t out_get_latency(const struct audio_stream_out *stream)
107 static int out_set_volume(struct audio_stream_out *stream, float left,
111 /* volume controlled in audioflinger mixer (digital) */
115 static int out_get_render_position(const struct audio_stream_out *stream,
116 uint32_t *dsp_frames)
122 static int out_add_audio_effect(const struct audio_stream *stream,
123 effect_handle_t effect)
129 static int out_remove_audio_effect(const struct audio_stream *stream,
130 effect_handle_t effect)
136 static uint32_t in_get_sample_rate(const struct audio_stream *stream)
142 static int in_set_sample_rate(struct audio_stream *stream, uint32_t rate)
148 static size_t in_get_buffer_size(const struct audio_stream *stream)
154 static uint32_t in_get_channels(const struct audio_stream *stream)
160 static audio_format_t in_get_format(const struct audio_stream *stream)
166 static int in_set_format(struct audio_stream *stream, audio_format_t format)
172 static int in_standby(struct audio_stream *stream)
178 static int in_dump(const struct audio_stream *stream, int fd)
184 static int in_set_parameters(struct audio_stream *stream, const char *kvpairs)
190 static char *in_get_parameters(const struct audio_stream *stream,
197 static int in_set_gain(struct audio_stream_in *stream, float gain)
203 static ssize_t in_read(struct audio_stream_in *stream, void *buffer,
210 static uint32_t in_get_input_frames_lost(struct audio_stream_in *stream)
216 static int in_add_audio_effect(const struct audio_stream *stream,
217 effect_handle_t effect)
223 static int in_remove_audio_effect(const struct audio_stream *stream,
224 effect_handle_t effect)
230 static int audio_open_output_stream(struct audio_hw_device *dev,
231 audio_io_handle_t handle,
232 audio_devices_t devices,
233 audio_output_flags_t flags,
234 struct audio_config *config,
235 struct audio_stream_out **stream_out)
238 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *) dev;
239 struct audio_stream_out *out;
241 out = calloc(1, sizeof(struct audio_stream_out));
247 out->common.get_sample_rate = out_get_sample_rate;
248 out->common.set_sample_rate = out_set_sample_rate;
249 out->common.get_buffer_size = out_get_buffer_size;
250 out->common.get_channels = out_get_channels;
251 out->common.get_format = out_get_format;
252 out->common.set_format = out_set_format;
253 out->common.standby = out_standby;
254 out->common.dump = out_dump;
255 out->common.set_parameters = out_set_parameters;
256 out->common.get_parameters = out_get_parameters;
257 out->common.add_audio_effect = out_add_audio_effect;
258 out->common.remove_audio_effect = out_remove_audio_effect;
259 out->get_latency = out_get_latency;
260 out->set_volume = out_set_volume;
261 out->write = out_write;
262 out->get_render_position = out_get_render_position;
270 static void audio_close_output_stream(struct audio_hw_device *dev,
271 struct audio_stream_out *stream)
274 struct a2dp_audio_dev *a2dp_dev = (struct a2dp_audio_dev *)dev;
277 a2dp_dev->out = NULL;
280 static int audio_set_parameters(struct audio_hw_device *dev,
287 static char *audio_get_parameters(const struct audio_hw_device *dev,
294 static int audio_init_check(const struct audio_hw_device *dev)
300 static int audio_set_voice_volume(struct audio_hw_device *dev, float volume)
306 static int audio_set_master_volume(struct audio_hw_device *dev, float volume)
312 static int audio_set_mode(struct audio_hw_device *dev, int mode)
318 static int audio_set_mic_mute(struct audio_hw_device *dev, bool state)
324 static int audio_get_mic_mute(const struct audio_hw_device *dev, bool *state)
330 static size_t audio_get_input_buffer_size(const struct audio_hw_device *dev,
331 const struct audio_config *config)
337 static int audio_open_input_stream(struct audio_hw_device *dev,
338 audio_io_handle_t handle,
339 audio_devices_t devices,
340 struct audio_config *config,
341 struct audio_stream_in **stream_in)
343 struct audio_stream_in *in;
347 in = calloc(1, sizeof(struct audio_stream_in));
351 in->common.get_sample_rate = in_get_sample_rate;
352 in->common.set_sample_rate = in_set_sample_rate;
353 in->common.get_buffer_size = in_get_buffer_size;
354 in->common.get_channels = in_get_channels;
355 in->common.get_format = in_get_format;
356 in->common.set_format = in_set_format;
357 in->common.standby = in_standby;
358 in->common.dump = in_dump;
359 in->common.set_parameters = in_set_parameters;
360 in->common.get_parameters = in_get_parameters;
361 in->common.add_audio_effect = in_add_audio_effect;
362 in->common.remove_audio_effect = in_remove_audio_effect;
363 in->set_gain = in_set_gain;
365 in->get_input_frames_lost = in_get_input_frames_lost;
372 static void audio_close_input_stream(struct audio_hw_device *dev,
373 struct audio_stream_in *stream_in)
379 static int audio_dump(const audio_hw_device_t *device, int fd)
385 static int audio_close(hw_device_t *device)
392 static int audio_open(const hw_module_t *module, const char *name,
393 hw_device_t **device)
395 struct a2dp_audio_dev *a2dp_dev;
399 if (strcmp(name, AUDIO_HARDWARE_INTERFACE)) {
400 error("interface %s not matching [%s]", name,
401 AUDIO_HARDWARE_INTERFACE);
405 a2dp_dev = calloc(1, sizeof(struct a2dp_audio_dev));
409 a2dp_dev->dev.common.version = AUDIO_DEVICE_API_VERSION_CURRENT;
410 a2dp_dev->dev.common.module = (struct hw_module_t *) module;
411 a2dp_dev->dev.common.close = audio_close;
413 a2dp_dev->dev.init_check = audio_init_check;
414 a2dp_dev->dev.set_voice_volume = audio_set_voice_volume;
415 a2dp_dev->dev.set_master_volume = audio_set_master_volume;
416 a2dp_dev->dev.set_mode = audio_set_mode;
417 a2dp_dev->dev.set_mic_mute = audio_set_mic_mute;
418 a2dp_dev->dev.get_mic_mute = audio_get_mic_mute;
419 a2dp_dev->dev.set_parameters = audio_set_parameters;
420 a2dp_dev->dev.get_parameters = audio_get_parameters;
421 a2dp_dev->dev.get_input_buffer_size = audio_get_input_buffer_size;
422 a2dp_dev->dev.open_output_stream = audio_open_output_stream;
423 a2dp_dev->dev.close_output_stream = audio_close_output_stream;
424 a2dp_dev->dev.open_input_stream = audio_open_input_stream;
425 a2dp_dev->dev.close_input_stream = audio_close_input_stream;
426 a2dp_dev->dev.dump = audio_dump;
428 /* Note that &a2dp_dev->dev.common is the same pointer as a2dp_dev.
429 * This results from the structure of following structs:a2dp_audio_dev,
430 * audio_hw_device. We will rely on this later in the code.*/
431 *device = &a2dp_dev->dev.common;
436 static struct hw_module_methods_t hal_module_methods = {
440 struct audio_module HAL_MODULE_INFO_SYM = {
442 .tag = HARDWARE_MODULE_TAG,
445 .id = AUDIO_HARDWARE_MODULE_ID,
446 .name = "A2DP Bluez HW HAL",
447 .author = "Intel Corporation",
448 .methods = &hal_module_methods,