/*
 * 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 Output"

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

#include <cutils/log.h>

#define EFFECT_UUID_NULL EFFECT_UUID_NULL_OUT
#define EFFECT_UUID_NULL_STR EFFECT_UUID_NULL_STR_OUT
#include "audio_hw.h"

/*
 * Functions
 */

static uint32_t audio_out_get_sample_rate(const struct audio_stream *stream)
{
	return 44100;
}

static int audio_out_set_sample_rate(struct audio_stream *stream, uint32_t rate)
{
	LOGD("%s(%p, %d)", __func__, stream, rate);

	return 0;
}

static size_t audio_out_get_buffer_size(const struct audio_stream *stream)
{
	return 4096;
}

static uint32_t audio_out_get_channels(const struct audio_stream *stream)
{
	return AUDIO_CHANNEL_OUT_STEREO;
}

static int audio_out_get_format(const struct audio_stream *stream)
{
	return AUDIO_FORMAT_PCM_16_BIT;
}

static int audio_out_set_format(struct audio_stream *stream, int format)
{
	LOGD("%s(%p, %d)", __func__, stream, format);

	return 0;
}

static int audio_out_standby(struct audio_stream *stream)
{
	LOGD("%s(%p)", __func__, stream);

	return 0;
}

static int audio_out_dump(const struct audio_stream *stream, int fd)
{
	LOGD("%s(%p, %d)", __func__, stream, fd);

	return 0;
}

static int audio_out_set_parameters(struct audio_stream *stream, const char *kvpairs)
{
	LOGD("%s(%p, %s)", __func__, stream, kvpairs);

	return 0;
}

static char * audio_out_get_parameters(const struct audio_stream *stream, const char *keys)
{
	LOGD("%s(%p, %s)", __func__, stream, keys);

	return strdup("");
}

static uint32_t audio_out_get_latency(const struct audio_stream_out *stream)
{
	LOGD("%s(%p)", __func__, stream);

	return 0;
}

static int audio_out_set_volume(struct audio_stream_out *stream, float left,
	float right)
{
	LOGD("%s(%p, %f, %f)", __func__, stream, left, right);

	return 0;
}

static ssize_t audio_out_write(struct audio_stream_out *stream,
	const void *buffer, size_t bytes)
{
	/* XXX: fake timing for audio output */
	usleep(bytes * 1000000 / audio_stream_frame_size(&stream->common) /
		   audio_out_get_sample_rate(&stream->common));
	return bytes;
}

static int audio_out_get_render_position(const struct audio_stream_out *stream,
	uint32_t *dsp_frames)
{
	LOGD("%s(%p, %p)", __func__, stream, dsp_frames);

	return -EINVAL;
}

static int audio_out_add_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
{
	LOGD("%s(%p, %p)", __func__, stream, effect);

	return 0;
}

static int audio_out_remove_audio_effect(const struct audio_stream *stream, effect_handle_t effect)
{
	LOGD("%s(%p, %p)", __func__, stream, effect);

	return 0;
}

/*
 * Interface
 */

void audio_hw_close_output_stream(struct audio_hw_device *dev,
	struct audio_stream_out *stream)
{
	LOGD("%s(%p)", __func__, stream);

	if(stream != NULL)
		free(stream);
}

int audio_hw_open_output_stream(struct audio_hw_device *dev,
	uint32_t devices, int *format, uint32_t *channels, uint32_t *sample_rate,
	struct audio_stream_out **stream_out)
{
	struct tinyalsa_audio_device *tinyalsa_audio_device;
	struct tinyalsa_audio_stream_out *tinyalsa_audio_stream_out;
	struct audio_stream_out *stream;

	LOGD("%s(%p, %d, %p, %p, %p, %p)",
		__func__, dev, devices, format, channels, sample_rate, stream_out);

	if(dev == NULL)
		return -EINVAL;

	tinyalsa_audio_device = (struct tinyalsa_audio_device *) dev;
	tinyalsa_audio_stream_out = calloc(1, sizeof(struct tinyalsa_audio_stream_out));

	if(tinyalsa_audio_stream_out == NULL)
		return -ENOMEM;

	tinyalsa_audio_stream_out->dev = tinyalsa_audio_device;
	stream = &(tinyalsa_audio_stream_out->stream);

	stream->common.get_sample_rate = audio_out_get_sample_rate;
	stream->common.set_sample_rate = audio_out_set_sample_rate;
	stream->common.get_buffer_size = audio_out_get_buffer_size;
	stream->common.get_channels = audio_out_get_channels;
	stream->common.get_format = audio_out_get_format;
	stream->common.set_format = audio_out_set_format;
	stream->common.standby = audio_out_standby;
	stream->common.dump = audio_out_dump;
	stream->common.set_parameters = audio_out_set_parameters;
	stream->common.get_parameters = audio_out_get_parameters;
	stream->common.add_audio_effect = audio_out_add_audio_effect;
	stream->common.remove_audio_effect = audio_out_remove_audio_effect;
	stream->get_latency = audio_out_get_latency;
	stream->set_volume = audio_out_set_volume;
	stream->write = audio_out_write;
	stream->get_render_position = audio_out_get_render_position;

	*stream_out = stream;

	return 0;
}