--- /dev/null
+/* ALSA mixer track implementation.
+ * Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst-i18n-plugin.h>
+
+#include "gstalsamixertrack.h"
+
+static void gst_alsa_mixer_track_init (GstAlsaMixerTrack * alsa_track);
+static void gst_alsa_mixer_track_class_init (gpointer g_class,
+ gpointer class_data);
+
+static GstMixerTrackClass *parent_class = NULL;
+
+GType
+gst_alsa_mixer_track_get_type (void)
+{
+ static GType track_type = 0;
+
+ if (!track_type) {
+ static const GTypeInfo track_info = {
+ sizeof (GstAlsaMixerTrackClass),
+ NULL,
+ NULL,
+ gst_alsa_mixer_track_class_init,
+ NULL,
+ NULL,
+ sizeof (GstAlsaMixerTrack),
+ 0,
+ (GInstanceInitFunc) gst_alsa_mixer_track_init,
+ NULL
+ };
+
+ track_type =
+ g_type_register_static (GST_TYPE_MIXER_TRACK, "GstAlsaMixerTrack",
+ &track_info, 0);
+ }
+
+ return track_type;
+}
+
+static void
+gst_alsa_mixer_track_class_init (gpointer g_class, gpointer class_data)
+{
+ parent_class = g_type_class_peek_parent (g_class);
+}
+
+static void
+gst_alsa_mixer_track_init (GstAlsaMixerTrack * alsa_track)
+{
+}
+
+static void
+gst_alsa_mixer_track_update_alsa_capabilities (GstAlsaMixerTrack * alsa_track)
+{
+ alsa_track->alsa_flags = 0;
+ alsa_track->capture_group = -1;
+
+ /* common flags */
+ if (snd_mixer_selem_has_common_volume (alsa_track->element))
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_VOLUME;
+
+ if (snd_mixer_selem_has_common_switch (alsa_track->element))
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_SWITCH;
+
+ /* Since we create two separate mixer track objects for alsa elements that
+ * support both playback and capture, we're going to 'hide' the alsa flags
+ * that don't pertain to this mixer track from alsa_flags, otherwise
+ * gst_alsa_mixer_track_update() is going to do things we don't want */
+
+ /* playback flags */
+ if ((GST_MIXER_TRACK (alsa_track)->flags & GST_MIXER_TRACK_OUTPUT)) {
+ if (snd_mixer_selem_has_playback_volume (alsa_track->element))
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_PVOLUME;
+
+ if (snd_mixer_selem_has_playback_switch (alsa_track->element))
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_PSWITCH;
+ }
+
+ /* capture flags */
+ if ((GST_MIXER_TRACK (alsa_track)->flags & GST_MIXER_TRACK_INPUT)) {
+ if (snd_mixer_selem_has_capture_volume (alsa_track->element))
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CVOLUME;
+
+ if (snd_mixer_selem_has_capture_switch (alsa_track->element)) {
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CSWITCH;
+
+ if (snd_mixer_selem_has_capture_switch_exclusive (alsa_track->element)) {
+ alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CSWITCH_EXCL;
+ alsa_track->capture_group =
+ snd_mixer_selem_get_capture_group (alsa_track->element);
+ }
+ }
+ }
+
+ GST_LOG ("[%s] alsa_flags=0x%08x, capture_group=%d",
+ snd_mixer_selem_get_name (alsa_track->element),
+ alsa_track->alsa_flags, alsa_track->capture_group);
+}
+
+inline static gboolean
+alsa_track_has_cap (GstAlsaMixerTrack * alsa_track, guint32 flag)
+{
+ return ((alsa_track->alsa_flags & flag) != 0);
+}
+
+GstMixerTrack *
+gst_alsa_mixer_track_new (snd_mixer_elem_t * element,
+ gint num, gint track_num, gint flags, gboolean sw,
+ GstAlsaMixerTrack * shared_mute_track, gboolean append_capture)
+{
+ GstAlsaMixerTrack *alsa_track;
+ GstMixerTrack *track;
+ const gchar *name;
+ guint index;
+ const gchar *label;
+ gint i;
+ long min = 0, max = 0;
+ const struct
+ {
+ const gchar orig[12];
+ const gchar trans[12];
+ } alsa_track_labels[] = {
+ {
+ "Master", N_("Master")}, {
+ "Bass", N_("Bass")}, {
+ "Treble", N_("Treble")}, {
+ "PCM", N_("PCM")}, {
+ "Synth", N_("Synth")}, {
+ "Line", N_("Line-in")}, {
+ "CD", N_("CD")}, {
+ "Mic", N_("Microphone")}, {
+ "PC Speaker", N_("PC Speaker")}, {
+ "Playback", N_("Playback")}, {
+ "Capture", N_("Capture")}
+ };
+
+ name = snd_mixer_selem_get_name (element);
+ index = snd_mixer_selem_get_index (element);
+
+ GST_LOG
+ ("[%s,%u] num=%d,track_num=%d,flags=0x%08x,sw=%s,shared_mute_track=%p",
+ name, index, num, track_num, flags, (sw) ? "true" : "false",
+ shared_mute_track);
+
+ track = (GstMixerTrack *) g_object_new (GST_ALSA_MIXER_TRACK_TYPE,
+ "untranslated-label", name, "index", index, NULL);
+
+ alsa_track = (GstAlsaMixerTrack *) track;
+
+ GST_LOG ("[%s] created new mixer track %p", name, track);
+
+ /* This reflects the assumptions used for GstAlsaMixerTrack */
+ if (!(!!(flags & GST_MIXER_TRACK_OUTPUT) ^ !!(flags & GST_MIXER_TRACK_INPUT))) {
+ GST_ERROR ("Mixer track must be either output or input!");
+ g_return_val_if_reached (NULL);
+ }
+
+ track->flags = flags;
+ alsa_track->element = element;
+ alsa_track->shared_mute = shared_mute_track;
+ alsa_track->track_num = track_num;
+ alsa_track->alsa_channels = 0;
+
+ gst_alsa_mixer_track_update_alsa_capabilities (alsa_track);
+
+ if (flags & GST_MIXER_TRACK_OUTPUT) {
+ while (alsa_track->alsa_channels < GST_ALSA_MAX_CHANNELS &&
+ snd_mixer_selem_has_playback_channel (element,
+ alsa_track->alsa_channels)) {
+ alsa_track->alsa_channels++;
+ }
+ GST_LOG ("[%s] %d output channels", name, alsa_track->alsa_channels);
+ } else if (flags & GST_MIXER_TRACK_INPUT) {
+ while (alsa_track->alsa_channels < GST_ALSA_MAX_CHANNELS &&
+ snd_mixer_selem_has_capture_channel (element,
+ alsa_track->alsa_channels)) {
+ alsa_track->alsa_channels++;
+ }
+ GST_LOG ("[%s] %d input channels", name, alsa_track->alsa_channels);
+ } else {
+ g_assert_not_reached ();
+ }
+
+ if (sw)
+ track->num_channels = 0;
+ else
+ track->num_channels = alsa_track->alsa_channels;
+
+ /* translate the name if we can */
+ label = name;
+ for (i = 0; i < G_N_ELEMENTS (alsa_track_labels); ++i) {
+ if (g_utf8_collate (label, alsa_track_labels[i].orig) == 0) {
+ label = _(alsa_track_labels[i].trans);
+ break;
+ }
+ }
+
+ if (num == 0) {
+ track->label = g_strdup_printf ("%s%s%s", label,
+ append_capture ? " " : "", append_capture ? _("Capture") : "");
+ } else {
+ track->label = g_strdup_printf ("%s%s%s %d", label,
+ append_capture ? " " : "", append_capture ? _("Capture") : "", num);
+ }
+
+ /* set volume information */
+ if (track->num_channels > 0) {
+ if ((flags & GST_MIXER_TRACK_OUTPUT))
+ snd_mixer_selem_get_playback_volume_range (element, &min, &max);
+ else
+ snd_mixer_selem_get_capture_volume_range (element, &min, &max);
+ }
+ track->min_volume = (gint) min;
+ track->max_volume = (gint) max;
+
+ for (i = 0; i < track->num_channels; i++) {
+ long tmp = 0;
+
+ if (flags & GST_MIXER_TRACK_OUTPUT)
+ snd_mixer_selem_get_playback_volume (element, i, &tmp);
+ else
+ snd_mixer_selem_get_capture_volume (element, i, &tmp);
+
+ alsa_track->volumes[i] = (gint) tmp;
+ }
+
+ gst_alsa_mixer_track_update (alsa_track);
+
+ return track;
+}
+
+void
+gst_alsa_mixer_track_update (GstAlsaMixerTrack * alsa_track)
+{
+ GstMixerTrack *track = (GstMixerTrack *) alsa_track;
+ gint i;
+ gint audible = !(track->flags & GST_MIXER_TRACK_MUTE);
+
+ if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_PVOLUME)) {
+ /* update playback volume */
+ for (i = 0; i < track->num_channels; i++) {
+ long vol = 0;
+
+ snd_mixer_selem_get_playback_volume (alsa_track->element, i, &vol);
+ alsa_track->volumes[i] = (gint) vol;
+ }
+ }
+
+ if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_CVOLUME)) {
+ /* update capture volume */
+ for (i = 0; i < track->num_channels; i++) {
+ long vol = 0;
+
+ snd_mixer_selem_get_capture_volume (alsa_track->element, i, &vol);
+ alsa_track->volumes[i] = (gint) vol;
+ }
+ }
+
+ /* Any updates in flags? */
+ if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_PSWITCH)) {
+ int v = 0;
+
+ audible = 0;
+ for (i = 0; i < alsa_track->alsa_channels; ++i) {
+ snd_mixer_selem_get_playback_switch (alsa_track->element, i, &v);
+ audible += v;
+ }
+
+ } else if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_PVOLUME) &&
+ track->flags & GST_MIXER_TRACK_MUTE) {
+ /* check if user has raised volume with a parallel running application */
+
+ for (i = 0; i < track->num_channels; i++) {
+ long vol = 0;
+
+ snd_mixer_selem_get_playback_volume (alsa_track->element, i, &vol);
+
+ if (vol > track->min_volume) {
+ audible = 1;
+ break;
+ }
+ }
+ }
+
+ if (!!(audible) != !(track->flags & GST_MIXER_TRACK_MUTE)) {
+ if (audible) {
+ track->flags &= ~GST_MIXER_TRACK_MUTE;
+
+ if (alsa_track->shared_mute)
+ ((GstMixerTrack *) (alsa_track->shared_mute))->flags &=
+ ~GST_MIXER_TRACK_MUTE;
+ } else {
+ track->flags |= GST_MIXER_TRACK_MUTE;
+
+ if (alsa_track->shared_mute)
+ ((GstMixerTrack *) (alsa_track->shared_mute))->flags |=
+ GST_MIXER_TRACK_MUTE;
+ }
+ }
+
+ if (track->flags & GST_MIXER_TRACK_INPUT) {
+ gint recording = track->flags & GST_MIXER_TRACK_RECORD;
+
+ if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_CSWITCH)) {
+ int v = 0;
+
+ recording = 0;
+ for (i = 0; i < alsa_track->alsa_channels; ++i) {
+ snd_mixer_selem_get_capture_switch (alsa_track->element, i, &v);
+ recording += v;
+ }
+
+ } else if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_CVOLUME) &&
+ !(track->flags & GST_MIXER_TRACK_RECORD)) {
+ /* check if user has raised volume with a parallel running application */
+
+ for (i = 0; i < track->num_channels; i++) {
+ long vol = 0;
+
+ snd_mixer_selem_get_capture_volume (alsa_track->element, i, &vol);
+
+ if (vol > track->min_volume) {
+ recording = 1;
+ break;
+ }
+ }
+ }
+
+ if (recording)
+ track->flags |= GST_MIXER_TRACK_RECORD;
+ else
+ track->flags &= ~GST_MIXER_TRACK_RECORD;
+ }
+
+}
projects / mafwsubrenderer / blobdiff