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/*
* Copyright (C) 2014 Michal Ratajsky <michal.ratajsky@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <glib-object.h>
#include <libmatemixer/matemixer.h>
#include <libmatemixer/matemixer-private.h>
#include "oss-common.h"
#include "oss-stream-control.h"
struct _OssStreamControlPrivate
{
gint fd;
gint devnum;
guint volume[2];
gfloat balance;
gboolean stereo;
MateMixerStreamControlRole role;
MateMixerStreamControlFlags flags;
};
static void oss_stream_control_class_init (OssStreamControlClass *klass);
static void oss_stream_control_init (OssStreamControl *control);
static void oss_stream_control_finalize (GObject *object);
G_DEFINE_TYPE (OssStreamControl, oss_stream_control, MATE_MIXER_TYPE_STREAM_CONTROL)
static gboolean oss_stream_control_set_mute (MateMixerStreamControl *mmsc,
gboolean mute);
static guint oss_stream_control_get_num_channels (MateMixerStreamControl *mmsc);
static guint oss_stream_control_get_volume (MateMixerStreamControl *mmsc);
static gboolean oss_stream_control_set_volume (MateMixerStreamControl *mmsc,
guint volume);
static gboolean oss_stream_control_has_channel_position (MateMixerStreamControl *mmsc,
MateMixerChannelPosition position);
static MateMixerChannelPosition oss_stream_control_get_channel_position (MateMixerStreamControl *mmsc,
guint channel);
static guint oss_stream_control_get_channel_volume (MateMixerStreamControl *mmsc,
guint channel);
static gboolean oss_stream_control_set_channel_volume (MateMixerStreamControl *mmsc,
guint channel,
guint volume);
static gboolean oss_stream_control_set_balance (MateMixerStreamControl *mmsc,
gfloat balance);
static guint oss_stream_control_get_min_volume (MateMixerStreamControl *mmsc);
static guint oss_stream_control_get_max_volume (MateMixerStreamControl *mmsc);
static guint oss_stream_control_get_normal_volume (MateMixerStreamControl *mmsc);
static guint oss_stream_control_get_base_volume (MateMixerStreamControl *mmsc);
static gboolean write_volume (OssStreamControl *control,
gint volume);
static void
oss_stream_control_class_init (OssStreamControlClass *klass)
{
GObjectClass *object_class;
MateMixerStreamControlClass *control_class;
object_class = G_OBJECT_CLASS (klass);
object_class->finalize = oss_stream_control_finalize;
control_class = MATE_MIXER_STREAM_CONTROL_CLASS (klass);
control_class->set_mute = oss_stream_control_set_mute;
control_class->get_num_channels = oss_stream_control_get_num_channels;
control_class->get_volume = oss_stream_control_get_volume;
control_class->set_volume = oss_stream_control_set_volume;
control_class->get_channel_volume = oss_stream_control_get_channel_volume;
control_class->set_channel_volume = oss_stream_control_set_channel_volume;
control_class->get_channel_position = oss_stream_control_get_channel_position;
control_class->has_channel_position = oss_stream_control_has_channel_position;
control_class->set_balance = oss_stream_control_set_balance;
control_class->get_min_volume = oss_stream_control_get_min_volume;
control_class->get_max_volume = oss_stream_control_get_max_volume;
control_class->get_normal_volume = oss_stream_control_get_normal_volume;
control_class->get_base_volume = oss_stream_control_get_base_volume;
g_type_class_add_private (object_class, sizeof (OssStreamControlPrivate));
}
static void
oss_stream_control_init (OssStreamControl *control)
{
control->priv = G_TYPE_INSTANCE_GET_PRIVATE (control,
OSS_TYPE_STREAM_CONTROL,
OssStreamControlPrivate);
}
static void
oss_stream_control_finalize (GObject *object)
{
OssStreamControl *control;
control = OSS_STREAM_CONTROL (object);
close (control->priv->fd);
G_OBJECT_CLASS (oss_stream_control_parent_class)->finalize (object);
}
OssStreamControl *
oss_stream_control_new (const gchar *name,
const gchar *label,
MateMixerStreamControlRole role,
gint fd,
gint devnum,
gboolean stereo)
{
OssStreamControl *control;
MateMixerStreamControlFlags flags;
flags = MATE_MIXER_STREAM_CONTROL_HAS_VOLUME |
MATE_MIXER_STREAM_CONTROL_CAN_SET_VOLUME;
if (stereo == TRUE)
flags |= MATE_MIXER_STREAM_CONTROL_CAN_BALANCE;
control = g_object_new (OSS_TYPE_STREAM_CONTROL,
"name", name,
"label", label,
"flags", flags,
NULL);
control->priv->fd = fd;
control->priv->devnum = devnum;
control->priv->stereo = stereo;
return control;
}
gboolean
oss_stream_control_update (OssStreamControl *control)
{
gint v;
gint ret;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (control), FALSE);
ret = ioctl (control->priv->fd, MIXER_READ (control->priv->devnum), &v);
if (ret < 0) {
g_warning ("Failed to read volume: %s", g_strerror (errno));
return FALSE;
}
control->priv->volume[0] = v & 0xFF;
if (control->priv->stereo == TRUE) {
gfloat balance;
guint left;
guint right;
control->priv->volume[1] = (v >> 8) & 0xFF;
/* Calculate balance */
left = control->priv->volume[0];
right = control->priv->volume[1];
if (left == right)
balance = 0.0f;
else if (left > right)
balance = -1.0f + ((gfloat) right / (gfloat) left);
else
balance = +1.0f - ((gfloat) left / (gfloat) right);
_mate_mixer_stream_control_set_balance (MATE_MIXER_STREAM_CONTROL (control),
balance);
}
return TRUE;
}
static gboolean
oss_stream_control_set_mute (MateMixerStreamControl *mmsc, gboolean mute)
{
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), FALSE);
// TODO
return TRUE;
}
static guint
oss_stream_control_get_num_channels (MateMixerStreamControl *mmsc)
{
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), 0);
return (OSS_STREAM_CONTROL (mmsc)->priv->stereo == TRUE) ? 2 : 1;
}
static guint
oss_stream_control_get_volume (MateMixerStreamControl *mmsc)
{
OssStreamControl *control;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), 0);
control = OSS_STREAM_CONTROL (mmsc);
if (control->priv->stereo == TRUE)
return MAX (control->priv->volume[0], control->priv->volume[1]);
else
return control->priv->volume[0];
}
static gboolean
oss_stream_control_set_volume (MateMixerStreamControl *mmsc, guint volume)
{
OssStreamControl *control;
gint v;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), FALSE);
control = OSS_STREAM_CONTROL (mmsc);
v = CLAMP (volume, 0, 100);
if (control->priv->stereo == TRUE)
v |= (volume & 0xFF) << 8;
return write_volume (control, v);
}
static guint
oss_stream_control_get_channel_volume (MateMixerStreamControl *mmsc, guint channel)
{
OssStreamControl *control;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), 0);
control = OSS_STREAM_CONTROL (mmsc);
if (control->priv->stereo == TRUE) {
if (channel == 0 || channel == 1)
return control->priv->volume[channel];
} else {
if (channel == 0)
return control->priv->volume[0];
}
return 0;
}
static gboolean
oss_stream_control_set_channel_volume (MateMixerStreamControl *mmsc,
guint channel,
guint volume)
{
OssStreamControl *control;
gint v;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), FALSE);
control = OSS_STREAM_CONTROL (mmsc);
volume = CLAMP (volume, 0, 100);
if (control->priv->stereo == TRUE) {
if (channel > 1)
return FALSE;
/* Stereo channel volume - left channel is in the lowest 8 bits and
* right channel is in the higher 8 bits */
if (channel == 0)
v = volume | (control->priv->volume[1] << 8);
else
v = control->priv->volume[0] | (volume << 8);
} else {
if (channel > 0)
return FALSE;
/* Single channel volume - only lowest 8 bits are used */
v = volume;
}
return write_volume (control, v);
}
static MateMixerChannelPosition
oss_stream_control_get_channel_position (MateMixerStreamControl *mmsc, guint channel)
{
OssStreamControl *control;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), MATE_MIXER_CHANNEL_UNKNOWN);
control = OSS_STREAM_CONTROL (mmsc);
if (control->priv->stereo == TRUE) {
if (channel == 0)
return MATE_MIXER_CHANNEL_FRONT_LEFT;
else if (channel == 1)
return MATE_MIXER_CHANNEL_FRONT_RIGHT;
} else {
if (channel == 0)
return MATE_MIXER_CHANNEL_MONO;
}
return MATE_MIXER_CHANNEL_UNKNOWN;
}
static gboolean
oss_stream_control_has_channel_position (MateMixerStreamControl *mmsc,
MateMixerChannelPosition position)
{
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), FALSE);
if (position == MATE_MIXER_CHANNEL_MONO)
return OSS_STREAM_CONTROL (mmsc)->priv->stereo == FALSE;
if (position == MATE_MIXER_CHANNEL_FRONT_LEFT ||
position == MATE_MIXER_CHANNEL_FRONT_RIGHT)
return OSS_STREAM_CONTROL (mmsc)->priv->stereo == TRUE;
return FALSE;
}
static gboolean
oss_stream_control_set_balance (MateMixerStreamControl *mmsc, gfloat balance)
{
OssStreamControl *control;
guint max;
gint v;
g_return_val_if_fail (OSS_IS_STREAM_CONTROL (mmsc), FALSE);
control = OSS_STREAM_CONTROL (mmsc);
max = MAX (control->priv->volume[0], control->priv->volume[1]);
if (balance <= 0) {
control->priv->volume[1] = (balance + 1.0f) * max;
control->priv->volume[0] = max;
} else {
control->priv->volume[0] = (1.0f - balance) * max;
control->priv->volume[1] = max;
}
v = control->priv->volume[0] | (control->priv->volume[1] << 8);
return write_volume (control, v);
}
static guint
oss_stream_control_get_min_volume (MateMixerStreamControl *mmsc)
{
return 0;
}
static guint
oss_stream_control_get_max_volume (MateMixerStreamControl *mmsc)
{
return 100;
}
static guint
oss_stream_control_get_normal_volume (MateMixerStreamControl *mmsc)
{
return 100;
}
static guint
oss_stream_control_get_base_volume (MateMixerStreamControl *mmsc)
{
return 100;
}
static gboolean
write_volume (OssStreamControl *control, gint volume)
{
gint ret;
ret = ioctl (control->priv->fd, MIXER_WRITE (control->priv->devnum), &volume);
if (ret < 0) {
g_warning ("Failed to set volume: %s", g_strerror (errno));
return FALSE;
}
return TRUE;
}
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