Add initial support for OSSv4. Mixer still needs a bit more love, but even magic has its limits.

Original commit message from CVS:
* configure.ac:
* sys/Makefile.am:
* sys/oss4/Makefile.am:
* sys/oss4/oss4-audio.c:
* sys/oss4/oss4-audio.h:
* sys/oss4/oss4-mixer-enum.c:
* sys/oss4/oss4-mixer-enum.h:
* sys/oss4/oss4-mixer-slider.c:
* sys/oss4/oss4-mixer-slider.h:
* sys/oss4/oss4-mixer-switch.c:
* sys/oss4/oss4-mixer-switch.h:
* sys/oss4/oss4-mixer.c:
* sys/oss4/oss4-mixer.h:
* sys/oss4/oss4-property-probe.c:
* sys/oss4/oss4-property-probe.h:
* sys/oss4/oss4-sink.c:
* sys/oss4/oss4-sink.h:
* sys/oss4/oss4-soundcard.h:
* sys/oss4/oss4-source.c:
* sys/oss4/oss4-source.h:
Add initial support for OSSv4. Mixer still needs a bit more love,
but even magic has its limits.

1 files changed, 128 insertions, 0 deletions

diff --git a/sys/oss4/oss4-mixer.h b/sys/oss4/oss4-mixer.h
new file mode 100644
index 00000000..4eaff50c
--- /dev/null
+++ b/sys/oss4/oss4-mixer.h
@@ -0,0 +1,128 @@
+/* GStreamer OSS4 mixer implementation
+ * Copyright (C) 2007-2008 Tim-Philipp Müller <tim centricular 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.
+ */
+
+#ifndef OSS4_MIXER_H
+#define OSS4_MIXER_H
+
+#include <gst/gst.h>
+
+#include "oss4-soundcard.h"
+
+#define GST_OSS4_MIXER(obj)              (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OSS4_MIXER,GstOss4Mixer))
+#define GST_OSS4_MIXER_CAST(obj)         ((GstOss4Mixer *)(obj))
+#define GST_OSS4_MIXER_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OSS4_MIXER,GstOss4MixerClass))
+#define GST_IS_OSS4_MIXER(obj)           (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OSS4_MIXER))
+#define GST_IS_OSS4_MIXER_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OSS4_MIXER))
+#define GST_TYPE_OSS4_MIXER              (gst_oss4_mixer_get_type())
+
+#define GST_OSS4_MIXER_IS_OPEN(obj)      (GST_OSS4_MIXER(obj)->fd != -1)
+
+typedef struct _GstOss4Mixer GstOss4Mixer;
+typedef struct _GstOss4MixerClass GstOss4MixerClass;
+
+struct _GstOss4Mixer {
+  GstElement            element;
+
+  /*< private >*/
+
+  /* element bits'n'bops */ 
+  gchar               * device;
+
+  /* mixer details */
+  gint                  fd;             /* file descriptor if open, or -1    */
+  gchar               * device_name;    /* device description, or NULL       */
+  gchar               * open_device;    /* the device we opened              */
+
+  GList               * tracks;         /* list of available tracks          */
+  GList               * controls;       /* list of available controls        */
+  gboolean              need_update;    /* re-read list of available tracks? */
+
+  oss_mixext            last_mixext;    /* we keep this around so we can
+                                         * easily check if the mixer
+                                         * interface has changed             */
+
+  GThread             * watch_thread;   /* thread watching for value changes */
+  GCond               * watch_cond;
+  gint                  watch_shutdown;
+  gint                  modify_counter; /* from MIXERINFO */
+
+  /* for property probe interface */
+  GList               * property_probe_list;
+};
+
+struct _GstOss4MixerClass {
+  GstElementClass       element_class;
+};
+
+/* helper struct holding info about one control */
+typedef struct _GstOss4MixerControl GstOss4MixerControl;
+
+struct _GstOss4MixerControl {
+  oss_mixext           mixext;
+  GstOss4MixerControl *parent;         /* NULL if root                         */
+  GstOss4MixerControl *mute;           /* sibling with mute function, or NULL  */
+  GList               *mute_group;     /* group of mute controls, or NULL      */
+  GList               *children;       /* GstOss4MixerControls (no ownership)  */
+
+  GQuark              *enum_vals;      /* 0-terminated array of values or NULL */
+  int                  enum_version;   /* 0 = list won't change                */
+
+  int                  last_val;       /* last value seen                      */
+
+  gboolean             is_virtual : 1; /* is a vmix control with dynamic label */
+  gboolean             is_master  : 1;
+  gboolean             is_slider  : 1; /* represent as slider                  */
+  gboolean             is_switch  : 1; /* represent as switch                  */
+  gboolean             is_enum    : 1; /* represent as combo/enumeration       */
+  gboolean             no_list    : 1; /* enumeration with no list available   */
+  gboolean             is_input   : 1; /* is an input-related control          */
+  gboolean             is_output  : 1; /* is an output-related control         */
+  gboolean             used       : 1; /* whether we know what to do with this */
+
+  gboolean             changed      : 1; /* transient flag used by watch thread */
+  gboolean             list_changed : 1; /* transient flag used by watch thread */
+};
+
+/* header says parent=-1 means root, but it can also be parent=ctrl */
+#define MIXEXT_IS_ROOT(me) ((me).parent == -1 || (me).parent == (me).ctrl)
+
+#define MIXEXT_IS_SLIDER(me) ((me).type == MIXT_MONOSLIDER ||            \
+    (me).type == MIXT_STEREOSLIDER || (me).type == MIXT_MONOSLIDER16 ||  \
+    (me).type == MIXT_STEREOSLIDER16 || (me).type == MIXT_SLIDER)
+
+#define MIXEXT_HAS_DESCRIPTION(me) (((me).flags & MIXF_DESCR) != 0)
+
+#define MIXEXT_ENUM_IS_AVAILABLE(me,num) \
+    (((me).enum_present[num/8]) & (1 << (num % 8)))
+
+
+GType     gst_oss4_mixer_get_type (void);
+
+gboolean  gst_oss4_mixer_get_control_val (GstOss4Mixer        * mixer,
+                                          GstOss4MixerControl * mc,
+                                          int                 * val);
+
+gboolean  gst_oss4_mixer_set_control_val (GstOss4Mixer        * mixer,
+                                          GstOss4MixerControl * mc,
+                                          int                   val);
+
+G_END_DECLS
+
+#endif /* OSS4_MIXER_H */
+