Added the support for the hardware depedent interface.

configure.in

@@ -31,6 +31,6 @@ SAVE_LIBRARY_VERSION
 AC_OUTPUT(Makefile doc/Makefile include/Makefile src/Makefile \
           src/control/Makefile src/mixer/Makefile src/pcm/Makefile \
 	  src/pcm/plugin/Makefile src/rawmidi/Makefile src/timer/Makefile \
-          src/seq/Makefile src/instr/Makefile \
+          src/hwdep/Makefile src/seq/Makefile src/instr/Makefile \
           test/Makefile utils/Makefile \
           utils/alsa-lib.spec)

include/Makefile.am

@@ -4,7 +4,7 @@ sysinclude_HEADERS = asoundlib.h
 # This is the order they will be concatenated into asoundlib.h!
 #
 header_files=header.h version.h error.h control.h mixer.h pcm.h rawmidi.h \
-             timer.h seq.h seqmid.h conv.h instr.h footer.h
+             timer.h hwdep.h seq.h seqmid.h conv.h instr.h footer.h
 
 noinst_HEADERS=$(header_files)
 

include/hwdep.h

@@ -0,0 +1,30 @@
+/****************************************************************************
+ *                                                                          *
+ *                               hwdep.h                                    *
+ *                     Hardware depedent interface                          *
+ *                                                                          *
+ ****************************************************************************/
+
+#define SND_HWDEP_OPEN_READ		(O_RDONLY)
+#define SND_HWDEP_OPEN_WRITE		(O_WRONLY)
+#define SND_HWDEP_OPEN_DUPLEX		(O_RDWR)
+#define SND_HWDEP_OPEN_NONBLOCK		(O_NONBLOCK)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct snd_hwdep snd_hwdep_t;
+
+int snd_hwdep_open(snd_hwdep_t **handle, int card, int device, int mode);
+int snd_hwdep_close(snd_hwdep_t *handle);
+int snd_hwdep_file_descriptor(snd_hwdep_t *handle);
+int snd_hwdep_block_mode(snd_hwdep_t *handle, int enable);
+int snd_hwdep_info(snd_hwdep_t *handle, snd_hwdep_info_t * info);
+ssize_t snd_hwdep_write(snd_hwdep_t *handle, const void *buffer, size_t size);
+ssize_t snd_hwdep_read(snd_hwdep_t *handle, void *buffer, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+

src/Makefile.am

@@ -1,24 +1,10 @@
-SUBDIRS=control mixer pcm rawmidi timer seq instr
+SUBDIRS=control mixer pcm rawmidi timer hwdep seq instr
 
 lib_LTLIBRARIES = libasound.la
 libasound_la_SOURCES = error.c 
 libasound_la_LIBADD = control/libcontrol.la mixer/libmixer.la pcm/libpcm.la \
-                      rawmidi/librawmidi.la timer/libtimer.la seq/libseq.la \
-		      instr/libinstr.la
+                      rawmidi/librawmidi.la timer/libtimer.la hwdep/libhwdep.la \
+                      seq/libseq.la instr/libinstr.la
 libasound_la_LDFLAGS = -release 0.5 -version-info 5:0:5
 
-control/libcontrol.la:
-	$(MAKE) -C control libcontrol.la
-
-mixer/libmixer.la:
-	$(MAKE) -C mixer libmixer.la
-
-pcm/libpcm.la:
-	$(MAKE) -C pcm libpcm.la
-
-rawmidi/librawmidi.la:
-	$(MAKE) -C rawmidi librawmidi.la
-
-
-
 INCLUDES=-I$(top_srcdir)/include

src/hwdep/Makefile.am

@@ -0,0 +1,7 @@
+EXTRA_LTLIBRARIES=libhwdep.la
+
+libhwdep_la_SOURCES = hwdep.c
+all: libhwdep.la
+
+
+INCLUDES=-I$(top_srcdir)/include

src/hwdep/hwdep.c

@@ -0,0 +1,144 @@
+/*
+ *  Hardware dependent Interface - main file
+ *  Copyright (c) 2000 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ *   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 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "asoundlib.h"
+
+#define SND_FILE_HWDEP	"/dev/snd/hwdepC%iD%i"
+#define SND_HWDEP_VERSION_MAX	SND_PROTOCOL_VERSION(1, 0, 0)
+
+struct snd_hwdep {
+	int card;
+	int device;
+	int fd;
+	int mode;
+};
+
+int snd_hwdep_open(snd_hwdep_t **handle, int card, int device, int mode)
+{
+	int fd, ver;
+	char filename[32];
+	snd_hwdep_t *hwdep;
+
+	*handle = NULL;
+	
+	if (card < 0 || card >= SND_CARDS)
+		return -EINVAL;
+	sprintf(filename, SND_FILE_HWDEP, card, device);
+	if ((fd = open(filename, mode)) < 0) {
+		snd_card_load(card);
+		if ((fd = open(filename, mode)) < 0)
+			return -errno;
+	}
+	if (ioctl(fd, SND_HWDEP_IOCTL_PVERSION, &ver) < 0) {
+		close(fd);
+		return -errno;
+	}
+	if (SND_PROTOCOL_INCOMPATIBLE(ver, SND_HWDEP_VERSION_MAX)) {
+		close(fd);
+		return -SND_ERROR_INCOMPATIBLE_VERSION;
+	}
+	hwdep = (snd_hwdep_t *) calloc(1, sizeof(snd_hwdep_t));
+	if (hwdep == NULL) {
+		close(fd);
+		return -ENOMEM;
+	}
+	hwdep->card = card;
+	hwdep->device = device;
+	hwdep->fd = fd;
+	hwdep->mode = mode;
+	*handle = hwdep;
+	return 0;
+}
+
+int snd_hwdep_close(snd_hwdep_t *hwdep)
+{
+	int res;
+
+	if (!hwdep)
+		return -EINVAL;
+	res = close(hwdep->fd) < 0 ? -errno : 0;
+	free(hwdep);
+	return res;
+}
+
+int snd_hwdep_file_descriptor(snd_hwdep_t *hwdep)
+{
+	if (!hwdep)
+		return -EINVAL;
+	return hwdep->fd;
+}
+
+int snd_hwdep_block_mode(snd_hwdep_t *hwdep, int enable)
+{
+	long flags;
+
+	if (!hwdep)
+		return -EINVAL;
+	if ((flags = fcntl(hwdep->fd, F_GETFL)) < 0)
+		return -errno;
+	if (enable)
+		flags &= ~O_NONBLOCK;
+	else
+		flags |= O_NONBLOCK;
+	if (fcntl(hwdep->fd, F_SETFL, flags) < 0)
+		return -errno;
+	return 0;
+}
+
+int snd_hwdep_info(snd_hwdep_t *hwdep, snd_hwdep_info_t * info)
+{
+	if (!hwdep || !info)
+		return -EINVAL;
+	if (ioctl(hwdep->fd, SND_HWDEP_IOCTL_INFO, info) < 0)
+		return -errno;
+	return 0;
+}
+
+ssize_t snd_hwdep_write(snd_hwdep_t *hwdep, const void *buffer, size_t size)
+{
+	ssize_t result;
+
+	if (!hwdep || (!buffer && size > 0) || size < 0)
+		return -EINVAL;
+	result = write(hwdep->fd, buffer, size);
+	if (result < 0)
+		return -errno;
+	return result;
+}
+
+ssize_t snd_hwdep_read(snd_hwdep_t *hwdep, void *buffer, size_t size)
+{
+	ssize_t result;
+
+	if (!hwdep || (!buffer && size > 0) || size < 0)
+		return -EINVAL;
+	result = read(hwdep->fd, buffer, size);
+	if (result < 0)
+		return -errno;
+	return result;
+}