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/*
* 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;
}
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