2003-09-13 13:42:09 +00:00
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/* GStreamer OSS Mixer implementation
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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2003-09-13 01:22:59 +00:00
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*
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* gstossmixer.h: mixer interface implementation for OSS
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include "gstossmixer.h"
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#define MASK_BIT_IS_SET(mask, bit) \
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(mask & (1 << bit))
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2003-09-13 15:47:59 +00:00
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static gboolean gst_ossmixer_supported (GstInterface *iface,
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GType iface_type);
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2003-09-13 01:22:59 +00:00
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static const GList * gst_ossmixer_list_channels (GstMixer *ossmixer);
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static void gst_ossmixer_set_volume (GstMixer *ossmixer,
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GstMixerChannel *channel,
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gint *volumes);
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static void gst_ossmixer_get_volume (GstMixer *ossmixer,
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GstMixerChannel *channel,
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gint *volumes);
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static void gst_ossmixer_set_record (GstMixer *ossmixer,
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GstMixerChannel *channel,
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gboolean record);
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static void gst_ossmixer_set_mute (GstMixer *ossmixer,
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GstMixerChannel *channel,
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gboolean mute);
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static const gchar *labels[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_LABELS;
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GstMixerChannel *
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gst_ossmixer_channel_new (GstOssElement *oss,
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gint channel_num,
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gint max_chans,
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gint flags)
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{
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GstMixerChannel *channel = (GstMixerChannel *) g_new (GstOssMixerChannel, 1);
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gint volumes[2];
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channel->label = g_strdup (labels[channel_num]);
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channel->num_channels = max_chans;
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channel->flags = flags;
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channel->min_volume = 0;
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channel->max_volume = 100;
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((GstOssMixerChannel *) channel)->channel_num = channel_num;
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/* volume */
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gst_ossmixer_get_volume (GST_MIXER (oss),
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channel, volumes);
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if (max_chans == 1) {
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volumes[1] = 0;
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}
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((GstOssMixerChannel *) channel)->lvol = volumes[0];
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((GstOssMixerChannel *) channel)->rvol = volumes[1];
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return channel;
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}
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void
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gst_ossmixer_channel_free (GstMixerChannel *channel)
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{
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g_free (channel->label);
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g_free (channel);
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}
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void
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gst_oss_interface_init (GstInterfaceClass *klass)
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{
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/* default virtual functions */
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klass->supported = gst_ossmixer_supported;
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}
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void
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gst_ossmixer_interface_init (GstMixerClass *klass)
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{
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/* default virtual functions */
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klass->list_channels = gst_ossmixer_list_channels;
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klass->set_volume = gst_ossmixer_set_volume;
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klass->get_volume = gst_ossmixer_get_volume;
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klass->set_mute = gst_ossmixer_set_mute;
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klass->set_record = gst_ossmixer_set_record;
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}
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static gboolean
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2003-09-13 15:47:59 +00:00
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gst_ossmixer_supported (GstInterface *iface,
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GType iface_type)
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2003-09-13 01:22:59 +00:00
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{
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2003-09-13 15:47:59 +00:00
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g_assert (iface_type == GST_TYPE_MIXER);
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2003-09-13 01:22:59 +00:00
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return (GST_OSSELEMENT (iface)->mixer_fd != -1);
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}
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static const GList *
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gst_ossmixer_list_channels (GstMixer *mixer)
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{
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GstOssElement *oss = GST_OSSELEMENT (mixer);
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g_return_val_if_fail (oss->mixer_fd != -1, NULL);
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return (const GList *) GST_OSSELEMENT (mixer)->channellist;
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}
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static void
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gst_ossmixer_get_volume (GstMixer *mixer,
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GstMixerChannel *channel,
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gint *volumes)
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{
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gint volume;
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GstOssElement *oss = GST_OSSELEMENT (mixer);
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GstOssMixerChannel *osschannel = (GstOssMixerChannel *) channel;
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g_return_if_fail (oss->mixer_fd != -1);
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if (channel->flags & GST_MIXER_CHANNEL_MUTE) {
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volumes[0] = osschannel->lvol;
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if (channel->num_channels == 2) {
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volumes[1] = osschannel->rvol;
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}
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} else {
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/* get */
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if (ioctl(oss->mixer_fd, MIXER_READ (osschannel->channel_num), &volume) < 0) {
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g_warning("Error getting recording device (%d) volume (0x%x): %s\n",
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osschannel->channel_num, volume, strerror(errno));
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volume = 0;
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}
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osschannel->lvol = volumes[0] = (volume & 0xff);
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if (channel->num_channels == 2) {
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osschannel->rvol = volumes[1] = ((volume >> 8) & 0xff);
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}
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}
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}
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static void
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gst_ossmixer_set_volume (GstMixer *mixer,
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GstMixerChannel *channel,
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gint *volumes)
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{
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gint volume;
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GstOssElement *oss = GST_OSSELEMENT (mixer);
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GstOssMixerChannel *osschannel = (GstOssMixerChannel *) channel;
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g_return_if_fail (oss->mixer_fd != -1);
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/* prepare the value for ioctl() */
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if (!(channel->flags & GST_MIXER_CHANNEL_MUTE)) {
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volume = (volumes[0] & 0xff);
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if (channel->num_channels == 2) {
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volume |= ((volumes[1] & 0xff) << 8);
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}
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/* set */
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if (ioctl(oss->mixer_fd, MIXER_WRITE (osschannel->channel_num), &volume) < 0) {
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g_warning("Error setting recording device (%d) volume (0x%x): %s\n",
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osschannel->channel_num, volume, strerror(errno));
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return;
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}
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}
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osschannel->lvol = volumes[0];
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if (channel->num_channels == 2) {
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osschannel->rvol = volumes[1];
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}
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}
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static void
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gst_ossmixer_set_mute (GstMixer *mixer,
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GstMixerChannel *channel,
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gboolean mute)
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{
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int volume;
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GstOssElement *oss = GST_OSSELEMENT (mixer);
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GstOssMixerChannel *osschannel = (GstOssMixerChannel *) channel;
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g_return_if_fail (oss->mixer_fd != -1);
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if (mute) {
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volume = 0;
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} else {
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volume = (osschannel->lvol & 0xff);
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if (MASK_BIT_IS_SET (oss->stereomask, osschannel->channel_num)) {
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volume |= ((osschannel->rvol & 0xff) << 8);
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}
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}
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if (ioctl(oss->mixer_fd, MIXER_WRITE(osschannel->channel_num), &volume) < 0) {
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g_warning("Error setting mixer recording device volume (0x%x): %s",
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volume, strerror(errno));
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return;
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}
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if (mute) {
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channel->flags |= GST_MIXER_CHANNEL_MUTE;
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} else {
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channel->flags &= ~GST_MIXER_CHANNEL_MUTE;
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}
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}
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static void
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gst_ossmixer_set_record (GstMixer *mixer,
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GstMixerChannel *channel,
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gboolean record)
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{
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GstOssElement *oss = GST_OSSELEMENT (mixer);
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GstOssMixerChannel *osschannel = (GstOssMixerChannel *) channel;
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g_return_if_fail (oss->mixer_fd != -1);
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/* if we're exclusive, then we need to unset the current one(s) */
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if (oss->mixcaps & SOUND_CAP_EXCL_INPUT) {
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GList *channel;
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for (channel = oss->channellist; channel != NULL; channel = channel->next) {
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GstMixerChannel *turn = (GstMixerChannel *) channel->data;
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turn->flags &= ~GST_MIXER_CHANNEL_RECORD;
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}
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oss->recdevs = 0;
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}
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/* set new record bit, if needed */
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if (record) {
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oss->recdevs |= (1 << osschannel->channel_num);
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} else {
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oss->recdevs &= ~(1 << osschannel->channel_num);
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}
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/* set it to the device */
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if (ioctl(oss->mixer_fd, SOUND_MIXER_WRITE_RECSRC, &oss->recdevs) < 0) {
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g_warning("Error setting mixer recording devices (0x%x): %s",
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oss->recdevs, strerror(errno));
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return;
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}
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if (record) {
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channel->flags |= GST_MIXER_CHANNEL_RECORD;
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} else {
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channel->flags &= ~GST_MIXER_CHANNEL_RECORD;
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}
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}
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void
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gst_ossmixer_build_list (GstOssElement *oss)
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{
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gint i, devmask;
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g_return_if_fail (oss->mixer_fd == -1);
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oss->mixer_fd = open (oss->mixer_dev, O_RDWR);
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if (oss->mixer_fd == -1) {
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g_warning ("Failed to open mixer device %s, mixing disabled: %s",
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oss->mixer_dev, strerror (errno));
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return;
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}
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/* get masks */
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ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECMASK, &oss->recmask);
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ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECSRC, &oss->recdevs);
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ioctl (oss->mixer_fd, SOUND_MIXER_READ_STEREODEVS, &oss->stereomask);
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ioctl (oss->mixer_fd, SOUND_MIXER_READ_DEVMASK, &devmask);
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ioctl (oss->mixer_fd, SOUND_MIXER_READ_CAPS, &oss->mixcaps);
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/* build channel list */
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for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
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if (devmask & (1 << i)) {
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GstMixerChannel *channel;
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gboolean input = FALSE, stereo = FALSE, record = FALSE;
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/* channel exists, make up capabilities */
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if (MASK_BIT_IS_SET (oss->stereomask, i))
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stereo = TRUE;
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if (MASK_BIT_IS_SET (oss->recmask, i))
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input = TRUE;
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if (MASK_BIT_IS_SET (oss->recdevs, i))
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record = TRUE;
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/* add channel to list */
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channel = gst_ossmixer_channel_new (oss, i, stereo ? 2 : 1,
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(record ? GST_MIXER_CHANNEL_RECORD : 0) |
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(input ? GST_MIXER_CHANNEL_INPUT :
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GST_MIXER_CHANNEL_OUTPUT));
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oss->channellist = g_list_append (oss->channellist, channel);
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}
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}
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}
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void
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gst_ossmixer_free_list (GstOssElement *oss)
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{
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g_return_if_fail (oss->mixer_fd != -1);
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g_list_foreach (oss->channellist, (GFunc) gst_ossmixer_channel_free, NULL);
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g_list_free (oss->channellist);
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oss->channellist = NULL;
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close (oss->mixer_fd);
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oss->mixer_fd = -1;
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}
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