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Diffstat (limited to 'backends/alsa/alsa-stream-control.c')
-rw-r--r-- | backends/alsa/alsa-stream-control.c | 739 |
1 files changed, 739 insertions, 0 deletions
diff --git a/backends/alsa/alsa-stream-control.c b/backends/alsa/alsa-stream-control.c new file mode 100644 index 0000000..bc7a937 --- /dev/null +++ b/backends/alsa/alsa-stream-control.c @@ -0,0 +1,739 @@ +/* + * Copyright (C) 2014 Michal Ratajsky <[email protected]> + * + * 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 <glib.h> +#include <glib-object.h> +#include <alsa/asoundlib.h> +#include <libmatemixer/matemixer.h> +#include <libmatemixer/matemixer-private.h> + +#include "alsa-constants.h" +#include "alsa-element.h" +#include "alsa-stream-control.h" + +struct _AlsaStreamControlPrivate +{ + AlsaControlData data; + guint32 channel_mask; + snd_mixer_elem_t *element; +}; + +static void alsa_element_interface_init (AlsaElementInterface *iface); + +static void alsa_stream_control_class_init (AlsaStreamControlClass *klass); +static void alsa_stream_control_init (AlsaStreamControl *control); + +G_DEFINE_ABSTRACT_TYPE_WITH_CODE (AlsaStreamControl, alsa_stream_control, + MATE_MIXER_TYPE_STREAM_CONTROL, + G_IMPLEMENT_INTERFACE (ALSA_TYPE_ELEMENT, + alsa_element_interface_init)) + +static snd_mixer_elem_t * alsa_stream_control_get_snd_element (AlsaElement *element); +static void alsa_stream_control_set_snd_element (AlsaElement *element, + snd_mixer_elem_t *el); + +static gboolean alsa_stream_control_load (AlsaElement *element); + +static gboolean alsa_stream_control_set_mute (MateMixerStreamControl *mmsc, + gboolean mute); + +static guint alsa_stream_control_get_num_channels (MateMixerStreamControl *mmsc); + +static guint alsa_stream_control_get_volume (MateMixerStreamControl *mmsc); + +static gboolean alsa_stream_control_set_volume (MateMixerStreamControl *mmsc, + guint volume); + +static gdouble alsa_stream_control_get_decibel (MateMixerStreamControl *mmsc); + +static gboolean alsa_stream_control_set_decibel (MateMixerStreamControl *mmsc, + gdouble decibel); + +static gboolean alsa_stream_control_has_channel_position (MateMixerStreamControl *mmsc, + MateMixerChannelPosition position); +static MateMixerChannelPosition alsa_stream_control_get_channel_position (MateMixerStreamControl *mmsc, + guint channel); + +static guint alsa_stream_control_get_channel_volume (MateMixerStreamControl *mmsc, + guint channel); +static gboolean alsa_stream_control_set_channel_volume (MateMixerStreamControl *mmsc, + guint channel, + guint volume); + +static gdouble alsa_stream_control_get_channel_decibel (MateMixerStreamControl *mmsc, + guint channel); +static gboolean alsa_stream_control_set_channel_decibel (MateMixerStreamControl *mmsc, + guint channel, + gdouble decibel); + +static gboolean alsa_stream_control_set_balance (MateMixerStreamControl *mmsc, + gfloat balance); + +static gboolean alsa_stream_control_set_fade (MateMixerStreamControl *mmsc, + gfloat fade); + +static guint alsa_stream_control_get_min_volume (MateMixerStreamControl *mmsc); +static guint alsa_stream_control_get_max_volume (MateMixerStreamControl *mmsc); +static guint alsa_stream_control_get_normal_volume (MateMixerStreamControl *mmsc); +static guint alsa_stream_control_get_base_volume (MateMixerStreamControl *mmsc); + +static void control_data_get_average_left_right (AlsaControlData *data, + guint *left, + guint *right); +static void control_data_get_average_front_back (AlsaControlData *data, + guint *front, + guint *back); + +static gfloat control_data_get_balance (AlsaControlData *data); +static gfloat control_data_get_fade (AlsaControlData *data); + +static void +alsa_element_interface_init (AlsaElementInterface *iface) +{ + iface->get_snd_element = alsa_stream_control_get_snd_element; + iface->set_snd_element = alsa_stream_control_set_snd_element; + iface->load = alsa_stream_control_load; +} + +static void +alsa_stream_control_class_init (AlsaStreamControlClass *klass) +{ + MateMixerStreamControlClass *control_class; + + control_class = MATE_MIXER_STREAM_CONTROL_CLASS (klass); + + control_class->set_mute = alsa_stream_control_set_mute; + control_class->get_num_channels = alsa_stream_control_get_num_channels; + control_class->get_volume = alsa_stream_control_get_volume; + control_class->set_volume = alsa_stream_control_set_volume; + control_class->get_decibel = alsa_stream_control_get_decibel; + control_class->set_decibel = alsa_stream_control_set_decibel; + control_class->has_channel_position = alsa_stream_control_has_channel_position; + control_class->get_channel_position = alsa_stream_control_get_channel_position; + control_class->get_channel_volume = alsa_stream_control_get_channel_volume; + control_class->set_channel_volume = alsa_stream_control_set_channel_volume; + control_class->get_channel_decibel = alsa_stream_control_get_channel_decibel; + control_class->set_channel_decibel = alsa_stream_control_set_channel_decibel; + control_class->set_balance = alsa_stream_control_set_balance; + control_class->set_fade = alsa_stream_control_set_fade; + control_class->get_min_volume = alsa_stream_control_get_min_volume; + control_class->get_max_volume = alsa_stream_control_get_max_volume; + control_class->get_normal_volume = alsa_stream_control_get_normal_volume; + control_class->get_base_volume = alsa_stream_control_get_base_volume; + + g_type_class_add_private (G_OBJECT_CLASS (klass), sizeof (AlsaStreamControlPrivate)); +} + +static void +alsa_stream_control_init (AlsaStreamControl *control) +{ + control->priv = G_TYPE_INSTANCE_GET_PRIVATE (control, + ALSA_TYPE_STREAM_CONTROL, + AlsaStreamControlPrivate); +} + +AlsaControlData * +alsa_stream_control_get_data (AlsaStreamControl *control) +{ + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (control), NULL); + + return &control->priv->data; +} + +void +alsa_stream_control_set_data (AlsaStreamControl *control, AlsaControlData *data) +{ + MateMixerStreamControlFlags flags = MATE_MIXER_STREAM_CONTROL_NO_FLAGS; + MateMixerStreamControl *mmsc; + + g_return_if_fail (ALSA_IS_STREAM_CONTROL (control)); + g_return_if_fail (data != NULL); + + mmsc = MATE_MIXER_STREAM_CONTROL (control); + + g_object_freeze_notify (G_OBJECT (control)); + + if (data->channels > 0) { + if (data->switch_usable == TRUE) { + flags |= MATE_MIXER_STREAM_CONTROL_HAS_MUTE; + if (data->active == TRUE) + flags |= MATE_MIXER_STREAM_CONTROL_CAN_SET_MUTE; + } + flags |= MATE_MIXER_STREAM_CONTROL_HAS_VOLUME; + if (data->active == TRUE) + flags |= MATE_MIXER_STREAM_CONTROL_CAN_SET_VOLUME; + } + if (data->max_decibel > -MATE_MIXER_INFINITY) + flags |= MATE_MIXER_STREAM_CONTROL_HAS_DECIBEL; + + control->priv->data = *data; + control->priv->channel_mask = _mate_mixer_create_channel_mask (data->c, data->channels); + + if (data->volume_joined == FALSE) { + if (MATE_MIXER_CHANNEL_MASK_HAS_LEFT (control->priv->channel_mask) && + MATE_MIXER_CHANNEL_MASK_HAS_RIGHT (control->priv->channel_mask)) + flags |= MATE_MIXER_STREAM_CONTROL_CAN_BALANCE; + + if (MATE_MIXER_CHANNEL_MASK_HAS_FRONT (control->priv->channel_mask) && + MATE_MIXER_CHANNEL_MASK_HAS_BACK (control->priv->channel_mask)) + flags |= MATE_MIXER_STREAM_CONTROL_CAN_FADE; + } + + _mate_mixer_stream_control_set_flags (mmsc, flags); + + if (data->switch_usable == TRUE) { + gboolean mute; + + /* If the mute switch is joined, all the channels get the same value, + * otherwise the element has per-channel mute, which we don't support. + * In that case, treat the control as unmuted if any channel is + * unmuted. */ + if (data->channels == 1 || data->switch_joined == TRUE) { + mute = data->m[0]; + } else { + gint i; + mute = TRUE; + for (i = 0; i < data->channels; i++) + if (data->m[i] == FALSE) { + mute = FALSE; + break; + } + } + _mate_mixer_stream_control_set_mute (mmsc, mute); + } else + _mate_mixer_stream_control_set_mute (mmsc, FALSE); + + if (flags & MATE_MIXER_STREAM_CONTROL_CAN_BALANCE) + _mate_mixer_stream_control_set_balance (mmsc, control_data_get_balance (data)); + if (flags & MATE_MIXER_STREAM_CONTROL_CAN_FADE) + _mate_mixer_stream_control_set_fade (mmsc, control_data_get_fade (data)); + + g_object_thaw_notify (G_OBJECT (control)); +} + +static snd_mixer_elem_t * +alsa_stream_control_get_snd_element (AlsaElement *element) +{ + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (element), NULL); + + return ALSA_STREAM_CONTROL (element)->priv->element; +} + +static void +alsa_stream_control_set_snd_element (AlsaElement *element, snd_mixer_elem_t *el) +{ + g_return_if_fail (ALSA_IS_STREAM_CONTROL (element)); + g_return_if_fail (el != NULL); + + ALSA_STREAM_CONTROL (element)->priv->element = el; +} + +static gboolean +alsa_stream_control_load (AlsaElement *element) +{ + AlsaStreamControl *control; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (element), FALSE); + + control = ALSA_STREAM_CONTROL (element); + + return ALSA_STREAM_CONTROL_GET_CLASS (control)->load (control); +} + +static gboolean +alsa_stream_control_set_mute (MateMixerStreamControl *mmsc, gboolean mute) +{ + AlsaStreamControl *control; + gboolean change = FALSE; + gint i; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + + /* If the switch is joined, only verify the first channel */ + if (control->priv->data.switch_joined == TRUE) { + if (control->priv->data.m[0] != mute) + change = TRUE; + } else { + /* Avoid trying to set the mute if all channels are already at the + * selected mute value */ + for (i = 0; i < control->priv->data.channels; i++) + if (control->priv->data.m[i] != mute) { + change = TRUE; + break; + } + } + + if (change == TRUE) { + AlsaStreamControlClass *klass; + + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + if (klass->set_mute (control, mute) == FALSE) + return FALSE; + + for (i = 0; i < control->priv->data.channels; i++) + control->priv->data.m[i] = mute; + } + return TRUE; +} + +static guint +alsa_stream_control_get_num_channels (MateMixerStreamControl *mmsc) +{ + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), 0); + + return ALSA_STREAM_CONTROL (mmsc)->priv->data.channels; +} + +static guint +alsa_stream_control_get_volume (MateMixerStreamControl *mmsc) +{ + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), 0); + + return ALSA_STREAM_CONTROL (mmsc)->priv->data.volume; +} + +static gboolean +alsa_stream_control_set_volume (MateMixerStreamControl *mmsc, guint volume) +{ + AlsaStreamControl *control; + gboolean change = FALSE; + gint i; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + volume = CLAMP (volume, control->priv->data.min, control->priv->data.max); + + /* If the volume is joined, only verify the first channel */ + if (control->priv->data.volume_joined == TRUE) { + if (control->priv->data.v[0] != volume) + change = TRUE; + } else { + /* Avoid trying to set the volume if all channels are already at the + * selected volume */ + for (i = 0; i < control->priv->data.channels; i++) + if (control->priv->data.v[i] != volume) { + change = TRUE; + break; + } + } + + if (change == TRUE) { + AlsaStreamControlClass *klass; + + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + if (klass->set_volume (control, volume) == FALSE) + return FALSE; + + for (i = 0; i < control->priv->data.channels; i++) + control->priv->data.v[i] = volume; + + g_object_notify (G_OBJECT (control), "volume"); + } + return TRUE; +} + +static gdouble +alsa_stream_control_get_decibel (MateMixerStreamControl *mmsc) +{ + AlsaStreamControl *control; + AlsaStreamControlClass *klass; + guint volume; + gdouble decibel; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), -MATE_MIXER_INFINITY); + + control = ALSA_STREAM_CONTROL (mmsc); + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + volume = alsa_stream_control_get_volume (mmsc); + + if (klass->get_decibel_from_volume (control, volume, &decibel) == FALSE) + return FALSE; + + return decibel; +} + +static gboolean +alsa_stream_control_set_decibel (MateMixerStreamControl *mmsc, gdouble decibel) +{ + AlsaStreamControl *control; + AlsaStreamControlClass *klass; + guint volume; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + + if (klass->get_volume_from_decibel (control, decibel, &volume) == FALSE) + return FALSE; + + return alsa_stream_control_set_volume (mmsc, volume); +} + +static gboolean +alsa_stream_control_has_channel_position (MateMixerStreamControl *mmsc, + MateMixerChannelPosition position) +{ + AlsaStreamControl *control; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + + if MATE_MIXER_CHANNEL_MASK_HAS_CHANNEL (control->priv->channel_mask, position) + return TRUE; + else + return FALSE; +} + +static MateMixerChannelPosition +alsa_stream_control_get_channel_position (MateMixerStreamControl *mmsc, guint channel) +{ + AlsaStreamControl *control; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), MATE_MIXER_CHANNEL_UNKNOWN); + + control = ALSA_STREAM_CONTROL (mmsc); + + if (channel >= control->priv->data.channels) + return MATE_MIXER_CHANNEL_UNKNOWN; + + return control->priv->data.c[channel]; +} + +static guint +alsa_stream_control_get_channel_volume (MateMixerStreamControl *mmsc, guint channel) +{ + AlsaStreamControl *control; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), 0); + + control = ALSA_STREAM_CONTROL (mmsc); + + if (channel >= control->priv->data.channels) + return FALSE; + + return control->priv->data.v[channel]; +} + +static gboolean +alsa_stream_control_set_channel_volume (MateMixerStreamControl *mmsc, guint channel, guint volume) +{ + AlsaStreamControl *control; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + + if (channel >= control->priv->data.channels) + return FALSE; + + /* Set volume for all channels at once when channels are joined */ + if (control->priv->data.volume_joined == TRUE) + return alsa_stream_control_set_volume (mmsc, volume); + + if (volume != control->priv->data.v[channel]) { + AlsaStreamControlClass *klass; + + /* Convert channel index to ALSA channel position and make sure it is valid */ + snd_mixer_selem_channel_id_t c = alsa_channel_map_to[control->priv->data.c[channel]]; + if G_UNLIKELY (c == SND_MIXER_SCHN_UNKNOWN) { + g_warn_if_reached (); + return FALSE; + } + + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + if (klass->set_channel_volume (control, c, volume) == FALSE) + return FALSE; + + control->priv->data.v[channel] = volume; + + g_object_notify (G_OBJECT (control), "volume"); + } + return TRUE; +} + +static gdouble +alsa_stream_control_get_channel_decibel (MateMixerStreamControl *mmsc, guint channel) +{ + AlsaStreamControl *control; + AlsaStreamControlClass *klass; + guint volume; + gdouble decibel; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), -MATE_MIXER_INFINITY); + + control = ALSA_STREAM_CONTROL (mmsc); + + if (channel >= control->priv->data.channels) + return FALSE; + + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + volume = control->priv->data.v[channel]; + + if (klass->get_decibel_from_volume (control, volume, &decibel) == FALSE) + return FALSE; + + return decibel; +} + +static gboolean +alsa_stream_control_set_channel_decibel (MateMixerStreamControl *mmsc, + guint channel, + gdouble decibel) +{ + AlsaStreamControl *control; + AlsaStreamControlClass *klass; + guint volume; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + + if (klass->get_volume_from_decibel (control, decibel, &volume) == FALSE) + return FALSE; + + return alsa_stream_control_set_channel_volume (mmsc, channel, volume); +} + +static gboolean +alsa_stream_control_set_balance (MateMixerStreamControl *mmsc, gfloat balance) +{ + AlsaStreamControlClass *klass; + AlsaStreamControl *control; + AlsaControlData *data; + guint left, + right; + guint nleft, + nright; + guint max; + guint channel; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + + data = &control->priv->data; + control_data_get_average_left_right (data, &left, &right); + + max = MAX (left, right); + if (balance <= 0) { + nright = (balance + 1.0f) * max; + nleft = max; + } else { + nleft = (1.0f - balance) * max; + nright = max; + } + + for (channel = 0; channel < data->channels; channel++) { + gboolean lc = MATE_MIXER_IS_LEFT_CHANNEL (data->c[channel]); + gboolean rc = MATE_MIXER_IS_RIGHT_CHANNEL (data->c[channel]); + + if (lc == TRUE || rc == TRUE) { + guint volume; + if (lc == TRUE) { + if (left == 0) + volume = nleft; + else + volume = CLAMP (((guint64) data->v[channel] * (guint64) nleft) / (guint64) left, + data->min, + data->max); + } else { + if (right == 0) + volume = nright; + else + volume = CLAMP (((guint64) data->v[channel] * (guint64) nright) / (guint64) right, + data->min, + data->max); + } + + if (klass->set_channel_volume (control, + alsa_channel_map_to[data->c[channel]], + volume) == TRUE) + data->v[channel] = volume; + } + } + return TRUE; +} + +static gboolean +alsa_stream_control_set_fade (MateMixerStreamControl *mmsc, gfloat fade) +{ + AlsaStreamControlClass *klass; + AlsaStreamControl *control; + AlsaControlData *data; + guint front, + back; + guint nfront, + nback; + guint max; + guint channel; + + g_return_val_if_fail (ALSA_IS_STREAM_CONTROL (mmsc), FALSE); + + control = ALSA_STREAM_CONTROL (mmsc); + klass = ALSA_STREAM_CONTROL_GET_CLASS (control); + + data = &control->priv->data; + control_data_get_average_front_back (data, &front, &back); + + max = MAX (front, back); + if (fade <= 0) { + nback = (fade + 1.0f) * max; + nfront = max; + } else { + nfront = (1.0f - fade) * max; + nback = max; + } + + for (channel = 0; channel < data->channels; channel++) { + gboolean fc = MATE_MIXER_IS_FRONT_CHANNEL (data->c[channel]); + gboolean bc = MATE_MIXER_IS_BACK_CHANNEL (data->c[channel]); + + if (fc == TRUE || bc == TRUE) { + guint volume; + if (fc == TRUE) { + if (front == 0) + volume = nfront; + else + volume = CLAMP (((guint64) data->v[channel] * (guint64) nfront) / (guint64) front, + data->min, + data->max); + } else { + if (back == 0) + volume = nback; + else + volume = CLAMP (((guint64) data->v[channel] * (guint64) nback) / (guint64) back, + data->min, + data->max); + } + + if (klass->set_channel_volume (control, + alsa_channel_map_to[data->c[channel]], + volume) == TRUE) + data->v[channel] = volume; + } + } + return TRUE; +} + +static guint +alsa_stream_control_get_min_volume (MateMixerStreamControl *msc) +{ + return ALSA_STREAM_CONTROL (msc)->priv->data.min; +} + +static guint +alsa_stream_control_get_max_volume (MateMixerStreamControl *msc) +{ + return ALSA_STREAM_CONTROL (msc)->priv->data.max; +} + +static guint +alsa_stream_control_get_normal_volume (MateMixerStreamControl *msc) +{ + return ALSA_STREAM_CONTROL (msc)->priv->data.max; +} + +static guint +alsa_stream_control_get_base_volume (MateMixerStreamControl *msc) +{ + return ALSA_STREAM_CONTROL (msc)->priv->data.max; +} + +static void +control_data_get_average_left_right (AlsaControlData *data, guint *left, guint *right) +{ + guint l = 0, + r = 0; + guint nl = 0, + nr = 0; + guint channel; + + for (channel = 0; channel < data->channels; channel++) + if MATE_MIXER_IS_LEFT_CHANNEL (data->c[channel]) { + l += data->v[channel]; + nl++; + } + else if MATE_MIXER_IS_RIGHT_CHANNEL (data->c[channel]) { + r += data->v[channel]; + nr++; + } + + *left = (nl > 0) ? l / nl : data->max; + *right = (nr > 0) ? r / nr : data->max; +} + +static void +control_data_get_average_front_back (AlsaControlData *data, guint *front, guint *back) +{ + guint f = 0, + b = 0; + guint nf = 0, + nb = 0; + guint channel; + + for (channel = 0; channel < data->channels; channel++) + if MATE_MIXER_IS_FRONT_CHANNEL (data->c[channel]) { + f += data->v[channel]; + nf++; + } + else if MATE_MIXER_IS_RIGHT_CHANNEL (data->c[channel]) { + b += data->v[channel]; + nb++; + } + + *front = (nf > 0) ? f / nf : data->max; + *back = (nb > 0) ? b / nb : data->max; +} + +static gfloat +control_data_get_balance (AlsaControlData *data) +{ + guint left; + guint right; + + control_data_get_average_left_right (data, &left, &right); + if (left == right) + return 0.0f; + + if (left > right) + return -1.0f + ((gfloat) right / (gfloat) left); + else + return +1.0f - ((gfloat) left / (gfloat) right); +} + +static gfloat +control_data_get_fade (AlsaControlData *data) +{ + guint front; + guint back; + + control_data_get_average_front_back (data, &front, &back); + if (front == back) + return 0.0f; + + if (front > back) + return -1.0f + ((gfloat) back / (gfloat) front); + else + return +1.0f - ((gfloat) front / (gfloat) back); +} |