kobjify.

this gives us several benefits, including:

* easier extensibility- new optional methods can be added to
  ac97/mixer/channel classes without having to fixup every driver.

* forward compatibility for drivers, provided no new mandatory methods are
  added.

1 files changed, 123 insertions, 0 deletions

diff --git a/sys/dev/sound/pcm/channel_if.m b/sys/dev/sound/pcm/channel_if.m
new file mode 100644
index 0000000..96a60f1
--- /dev/null
+++ b/sys/dev/sound/pcm/channel_if.m
@@ -0,0 +1,123 @@
+#
+# Copyright (c) 2000 Cameron Grant <cg@freebsd.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+#include <dev/sound/pcm/sound.h>
+
+INTERFACE channel;
+
+CODE {
+
+	static int
+	channel_nosetdir(kobj_t obj, void *data, int dir)
+	{
+		return 0;
+	}
+
+	static int
+	channel_noreset(kobj_t obj, void *data)
+	{
+		return 0;
+	}
+
+	static int
+	channel_noresetdone(kobj_t obj, void *data)
+	{
+		return 0;
+	}
+
+	static int
+	channel_nofree(kobj_t obj, void *data)
+	{
+		return 1;
+	}
+
+};
+
+METHOD void* init {
+	kobj_t obj;
+	void *devinfo;
+	snd_dbuf *b;
+	pcm_channel *c;
+	int dir;
+};
+
+METHOD int free {
+	kobj_t obj;
+	void *data;
+} DEFAULT channel_nofree;
+
+METHOD int reset {
+	kobj_t obj;
+	void *data;
+} DEFAULT channel_noreset;
+
+METHOD int resetdone {
+	kobj_t obj;
+	void *data;
+} DEFAULT channel_noresetdone;
+
+METHOD int setdir {
+	kobj_t obj;
+	void *data;
+	int dir;
+} DEFAULT channel_nosetdir;
+
+METHOD u_int32_t setformat {
+	kobj_t obj;
+	void *data;
+	u_int32_t format;
+};
+
+METHOD u_int32_t setspeed {
+	kobj_t obj;
+	void *data;
+	u_int32_t speed;
+};
+
+METHOD u_int32_t setblocksize {
+	kobj_t obj;
+	void *data;
+	u_int32_t blocksize;
+};
+
+METHOD int trigger {
+	kobj_t obj;
+	void *data;
+	int go;
+};
+
+METHOD u_int32_t getptr {
+	kobj_t obj;
+	void *data;
+};
+
+METHOD pcmchan_caps* getcaps {
+	kobj_t obj;
+	void *data;
+};
+