path: root/audio_hw.c

/*
 * Copyright (C) 2012 Paul Kocialkowski <contact@paulk.fr>
 * 
 * This is based on Galaxy Nexus audio.primary.tuna implementation:
 * Copyright 2011, The Android Open-Source Project
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define LOG_TAG "TinyALSA-Audio Hardware"

#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <sys/time.h>

#include <cutils/log.h>

#include "audio_hw.h"
#include "mixer.h"

/*
 * Functions
 */

static uint32_t audio_hw_get_supported_devices(const struct audio_hw_device *dev)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p)", __func__, dev);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	if(device->mixer == NULL)
		return -1;

	return (uint32_t) tinyalsa_mixer_get_supported_devices(device->mixer);
}

static int audio_hw_init_check(const struct audio_hw_device *dev)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p)", __func__, dev);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	if(device->mixer == NULL)
		return -1;

	return 0;
}

static int audio_hw_set_voice_volume(struct audio_hw_device *dev, float volume)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p, %f)", __func__, dev, volume);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	if(device->mixer == NULL)
		return -1;

	if(device->mode == AUDIO_MODE_IN_CALL) {
		// FIXME: Select the device from ril interface
		tinyalsa_mixer_set_voice_volume(device->mixer,
			AUDIO_DEVICE_IN_DEFAULT, device->mode, volume);
	}

	return 0;
}

static int audio_hw_set_master_volume(struct audio_hw_device *dev, float volume)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p, %f)", __func__, dev, volume);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	if(device->mixer == NULL)
		return -1;

	tinyalsa_mixer_set_master_volume(device->mixer, volume);

	return 0;
}

static int audio_hw_set_mode(struct audio_hw_device *dev, int mode)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p, %d)", __func__, dev, mode);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	device->mode = mode;

	// TODO: If mode changed, change routing

	return 0;
}

static int audio_hw_set_mic_mute(struct audio_hw_device *dev, bool state)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p, %d)", __func__, dev, state);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	if(device->mixer == NULL)
		return -1;

	if(device->mic_mute != state) {
		device->mic_mute = state;

		// FIXME: Select the device from input if mode isn't in-call,
		// select it from ril interface if mode is in-call
		tinyalsa_mixer_set_mic_mute(device->mixer,
			AUDIO_DEVICE_IN_DEFAULT, device->mode, state);
	}

	return 0;
}

static int audio_hw_get_mic_mute(const struct audio_hw_device *dev, bool *state)
{
	struct tinyalsa_audio_device *device;

	LOGD("%s(%p, %p)", __func__, dev, state);

	if(dev == NULL)
		return -1;

	device = (struct tinyalsa_audio_device *) dev;

	*state = device->mic_mute;

	return 0;
}

static int audio_hw_set_parameters(struct audio_hw_device *dev,
	const char *kvpairs)
{
	LOGD("%s(%p, %s)", __func__, dev, kvpairs);

	return -ENOSYS;
}

static char *audio_hw_get_parameters(const struct audio_hw_device *dev,
	const char *keys)
{
	LOGD("%s(%p, %s)", __func__, dev, keys);

	return NULL;
}

static size_t audio_hw_get_input_buffer_size(const struct audio_hw_device *dev,
	uint32_t sample_rate, int format, int channel_count)
{
	LOGD("%s(%p, %d, %d, %d)", __func__, dev, sample_rate, format, channel_count);

	return 320;
}

static int audio_hw_dump(const audio_hw_device_t *device, int fd)
{
	LOGD("%s(%p, %d)", __func__, device, fd);

	return 0;
}

/*
 * Interface
 */

int audio_hw_close(hw_device_t *device)
{
	struct tinyalsa_audio_device *tinyalsa_audio_device;

	LOGD("%s(%p)", __func__, device);

	if(device != NULL) {
		tinyalsa_audio_device = (struct tinyalsa_audio_device *) device;

		if(tinyalsa_audio_device != NULL && tinyalsa_audio_device->mixer != NULL) {
			tinyalsa_mixer_close(tinyalsa_audio_device->mixer);
			tinyalsa_audio_device->mixer = NULL;
		}

		free(device);
	}

	return 0;
}

int audio_hw_open(const hw_module_t *module, const char *name,
	hw_device_t **device)
{
	struct tinyalsa_audio_device *tinyalsa_audio_device = NULL;
	struct tinyalsa_mixer *tinyalsa_mixer = NULL;
	struct audio_hw_device *dev;
	int rc;

	LOGD("%s(%p, %s, %p)", __func__, module, name, device);

	if(strcmp(name, AUDIO_HARDWARE_INTERFACE) != 0)
		return -EINVAL;

	tinyalsa_audio_device = calloc(1, sizeof(struct tinyalsa_audio_device));
	if(tinyalsa_audio_device == NULL)
		return -ENOMEM;

	dev = &(tinyalsa_audio_device->device);

	dev->common.tag = HARDWARE_DEVICE_TAG;
	dev->common.version = 0;
	dev->common.module = (struct hw_module_t *) module;
	dev->common.close = audio_hw_close;

	dev->get_supported_devices = audio_hw_get_supported_devices;
	dev->init_check = audio_hw_init_check;
	dev->set_voice_volume = audio_hw_set_voice_volume;
	dev->set_master_volume = audio_hw_set_master_volume;
	dev->set_mode = audio_hw_set_mode;
	dev->set_mic_mute = audio_hw_set_mic_mute;
	dev->get_mic_mute = audio_hw_get_mic_mute;
	dev->set_parameters = audio_hw_set_parameters;
	dev->get_parameters = audio_hw_get_parameters;
	dev->get_input_buffer_size = audio_hw_get_input_buffer_size;

	dev->open_output_stream = audio_hw_open_output_stream;
	dev->close_output_stream = audio_hw_close_output_stream;

	dev->open_input_stream = audio_hw_open_input_stream;
	dev->close_input_stream = audio_hw_close_input_stream;

	dev->dump = audio_hw_dump;

	rc = tinyalsa_mixer_open(&tinyalsa_mixer, TINYALSA_MIXER_CONFIG_FILE);
	if(rc < 0 || tinyalsa_mixer == NULL) {
		LOGE("Failed to open mixer!");
		goto error_device;
	}

	rc = tinyalsa_mixer_set_route(tinyalsa_mixer, AUDIO_DEVICE_OUT_DEFAULT, AUDIO_MODE_NORMAL);
	if(rc < 0) {
		LOGE("Failed to set default mixer route");
	}

	tinyalsa_audio_device->mixer = tinyalsa_mixer;

	*device = &(dev->common);

	return 0;

error_device:
	*device = NULL;
	free(tinyalsa_audio_device);

	return -1;
}

struct hw_module_methods_t audio_hw_module_methods = {
	.open = audio_hw_open,
};

struct audio_module HAL_MODULE_INFO_SYM = {
	.common = {
		.tag = HARDWARE_MODULE_TAG,
		.version_major = 1,
		.version_minor = 0,
		.id = AUDIO_HARDWARE_MODULE_ID,
		.name = "TinyALSA-Audio",
		.author = "Paul Kocialkowski",
		.methods = &audio_hw_module_methods,
	},
};