diff options
Diffstat (limited to 'plugins/media-keys/cut-n-paste/gvc-channel-map.c')
| -rw-r--r-- | plugins/media-keys/cut-n-paste/gvc-channel-map.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/plugins/media-keys/cut-n-paste/gvc-channel-map.c b/plugins/media-keys/cut-n-paste/gvc-channel-map.c new file mode 100644 index 0000000..ea3e5af --- /dev/null +++ b/plugins/media-keys/cut-n-paste/gvc-channel-map.c @@ -0,0 +1,292 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- + * + * Copyright (C) 2008 William Jon McCann + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> + +#include <glib.h> +#include <glib/gi18n.h> + +#include <pulse/pulseaudio.h> + +#include "gvc-channel-map.h" + +#define GVC_CHANNEL_MAP_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_CHANNEL_MAP, GvcChannelMapPrivate)) + +#ifndef PA_CHECK_VERSION +#define PA_CHECK_VERSION(major,minor,micro) \ + ((PA_MAJOR > (major)) || \ + (PA_MAJOR == (major) && PA_MINOR > (minor)) || \ + (PA_MAJOR == (major) && PA_MINOR == (minor) && PA_MICRO >= (micro))) +#endif + + +struct GvcChannelMapPrivate +{ + pa_channel_map pa_map; + gboolean pa_volume_is_set; + pa_cvolume pa_volume; + gdouble extern_volume[NUM_TYPES]; /* volume, balance, fade, lfe */ + gboolean can_balance; + gboolean can_fade; + gboolean has_lfe; +}; + +enum { + VOLUME_CHANGED, + LAST_SIGNAL +}; + +static guint signals [LAST_SIGNAL] = { 0, }; + +static void gvc_channel_map_class_init (GvcChannelMapClass *klass); +static void gvc_channel_map_init (GvcChannelMap *channel_map); +static void gvc_channel_map_finalize (GObject *object); + +G_DEFINE_TYPE (GvcChannelMap, gvc_channel_map, G_TYPE_OBJECT) + +/* FIXME remove when we depend on a newer PA */ +static int +gvc_pa_channel_map_has_position (const pa_channel_map *map, pa_channel_position_t p) { + unsigned c; + + g_return_val_if_fail(pa_channel_map_valid(map), 0); + g_return_val_if_fail(p < PA_CHANNEL_POSITION_MAX, 0); + + for (c = 0; c < map->channels; c++) + if (map->map[c] == p) + return 1; + + return 0; +} + +#if !PA_CHECK_VERSION(0,9,16) +/* The PulseAudio master increase version only when tagged, so let's avoid clashing with pa_ namespace */ +#define pa_cvolume_get_position gvc_cvolume_get_position +static pa_volume_t +gvc_cvolume_get_position (pa_cvolume *cv, const pa_channel_map *map, pa_channel_position_t t) { + unsigned c; + pa_volume_t v = PA_VOLUME_MUTED; + + g_assert(cv); + g_assert(map); + + g_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED); + g_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED); + + for (c = 0; c < map->channels; c++) + if (map->map[c] == t) + if (cv->values[c] > v) + v = cv->values[c]; + + return v; +} +#endif + +guint +gvc_channel_map_get_num_channels (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), 0); + + if (!pa_channel_map_valid(&map->priv->pa_map)) + return 0; + + return map->priv->pa_map.channels; +} + +const gdouble * +gvc_channel_map_get_volume (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL); + + if (!pa_channel_map_valid(&map->priv->pa_map)) + return NULL; + + map->priv->extern_volume[VOLUME] = (gdouble) pa_cvolume_max (&map->priv->pa_volume); + if (gvc_channel_map_can_balance (map)) + map->priv->extern_volume[BALANCE] = (gdouble) pa_cvolume_get_balance (&map->priv->pa_volume, &map->priv->pa_map); + else + map->priv->extern_volume[BALANCE] = 0; + if (gvc_channel_map_can_fade (map)) + map->priv->extern_volume[FADE] = (gdouble) pa_cvolume_get_fade (&map->priv->pa_volume, &map->priv->pa_map); + else + map->priv->extern_volume[FADE] = 0; + if (gvc_channel_map_has_lfe (map)) + map->priv->extern_volume[LFE] = (gdouble) pa_cvolume_get_position (&map->priv->pa_volume, &map->priv->pa_map, PA_CHANNEL_POSITION_LFE); + else + map->priv->extern_volume[LFE] = 0; + + return map->priv->extern_volume; +} + +gboolean +gvc_channel_map_can_balance (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), FALSE); + + return map->priv->can_balance; +} + +gboolean +gvc_channel_map_can_fade (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), FALSE); + + return map->priv->can_fade; +} + +const char * +gvc_channel_map_get_mapping (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL); + + if (!pa_channel_map_valid(&map->priv->pa_map)) + return NULL; + + return pa_channel_map_to_pretty_name (&map->priv->pa_map); +} + +gboolean +gvc_channel_map_has_lfe (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), FALSE); + + return map->priv->has_lfe; +} + +const pa_channel_map * +gvc_channel_map_get_pa_channel_map (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL); + + if (!pa_channel_map_valid(&map->priv->pa_map)) + return NULL; + + return &map->priv->pa_map; +} + +const pa_cvolume * +gvc_channel_map_get_cvolume (GvcChannelMap *map) +{ + g_return_val_if_fail (GVC_IS_CHANNEL_MAP (map), NULL); + + if (!pa_channel_map_valid(&map->priv->pa_map)) + return NULL; + + return &map->priv->pa_volume; +} + +static void +gvc_channel_map_class_init (GvcChannelMapClass *klass) +{ + GObjectClass *gobject_class = G_OBJECT_CLASS (klass); + + gobject_class->finalize = gvc_channel_map_finalize; + + signals [VOLUME_CHANGED] = + g_signal_new ("volume-changed", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GvcChannelMapClass, volume_changed), + NULL, NULL, + g_cclosure_marshal_VOID__BOOLEAN, + G_TYPE_NONE, 1, G_TYPE_BOOLEAN); + + g_type_class_add_private (klass, sizeof (GvcChannelMapPrivate)); +} + +void +gvc_channel_map_volume_changed (GvcChannelMap *map, + const pa_cvolume *cv, + gboolean set) +{ + g_return_if_fail (GVC_IS_CHANNEL_MAP (map)); + g_return_if_fail (cv != NULL); + g_return_if_fail (pa_cvolume_compatible_with_channel_map(cv, &map->priv->pa_map)); + + if (pa_cvolume_equal(cv, &map->priv->pa_volume)) + return; + + map->priv->pa_volume = *cv; + + if (map->priv->pa_volume_is_set == FALSE) { + map->priv->pa_volume_is_set = TRUE; + return; + } + g_signal_emit (map, signals[VOLUME_CHANGED], 0, set); +} + +static void +gvc_channel_map_init (GvcChannelMap *map) +{ + map->priv = GVC_CHANNEL_MAP_GET_PRIVATE (map); + map->priv->pa_volume_is_set = FALSE; +} + +static void +gvc_channel_map_finalize (GObject *object) +{ + GvcChannelMap *channel_map; + + g_return_if_fail (object != NULL); + g_return_if_fail (GVC_IS_CHANNEL_MAP (object)); + + channel_map = GVC_CHANNEL_MAP (object); + + g_return_if_fail (channel_map->priv != NULL); + + G_OBJECT_CLASS (gvc_channel_map_parent_class)->finalize (object); +} + +GvcChannelMap * +gvc_channel_map_new (void) +{ + GObject *map; + map = g_object_new (GVC_TYPE_CHANNEL_MAP, NULL); + return GVC_CHANNEL_MAP (map); +} + +static void +set_from_pa_map (GvcChannelMap *map, + const pa_channel_map *pa_map) +{ + g_assert (pa_channel_map_valid(pa_map)); + + map->priv->can_balance = pa_channel_map_can_balance (pa_map); + map->priv->can_fade = pa_channel_map_can_fade (pa_map); + map->priv->has_lfe = gvc_pa_channel_map_has_position (pa_map, PA_CHANNEL_POSITION_LFE); + + map->priv->pa_map = *pa_map; + pa_cvolume_set(&map->priv->pa_volume, pa_map->channels, PA_VOLUME_NORM); +} + +GvcChannelMap * +gvc_channel_map_new_from_pa_channel_map (const pa_channel_map *pa_map) +{ + GObject *map; + map = g_object_new (GVC_TYPE_CHANNEL_MAP, NULL); + + set_from_pa_map (GVC_CHANNEL_MAP (map), pa_map); + + return GVC_CHANNEL_MAP (map); +} |