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op/sun.c

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+/*
+ * Copyright 2008-2013 Various Authors
+ * Copyright 2004-2005 Timo Hirvonen
+ *
+ * sun.c by alex <pukpuk@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/audioio.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "../op.h"
+#include "../sf.h"
+#include "../xmalloc.h"
+
+static sample_format_t sun_sf;
+static int sun_fd = -1;
+
+static char *sun_audio_device = NULL;
+
+static int sun_reset(void)
+{
+	if (ioctl(sun_fd, AUDIO_FLUSH, NULL) == -1)
+		return -1;
+
+	return 0;
+}
+
+static int sun_set_sf(sample_format_t sf)
+{
+	struct audio_info ainf;
+
+	AUDIO_INITINFO(&ainf);
+
+	sun_reset();
+	sun_sf = sf;
+
+	ainf.play.channels = sf_get_channels(sun_sf);
+	ainf.play.sample_rate = sf_get_rate(sun_sf);
+	ainf.play.pause = 0;
+	ainf.mode = AUMODE_PLAY;
+
+	switch (sf_get_bits(sun_sf)) {
+	case 16:
+		ainf.play.precision = 16;
+		if (sf_get_signed(sun_sf)) {
+			if (sf_get_bigendian(sun_sf))
+				ainf.play.encoding = AUDIO_ENCODING_SLINEAR_BE;
+			else
+				ainf.play.encoding = AUDIO_ENCODING_SLINEAR_LE;
+		} else {
+			if (sf_get_bigendian(sun_sf))
+				ainf.play.encoding = AUDIO_ENCODING_ULINEAR_BE;
+			else
+				ainf.play.encoding = AUDIO_ENCODING_ULINEAR_LE;
+		}
+		break;
+	case 8:
+		ainf.play.precision = 8;
+		if (sf_get_signed(sun_sf))
+			ainf.play.encoding = AUDIO_ENCODING_SLINEAR;
+		else
+			ainf.play.encoding = AUDIO_ENCODING_ULINEAR;
+		break;
+	default:
+		return -1;
+	}
+
+	if (ioctl(sun_fd, AUDIO_SETINFO, &ainf) == -1)
+		return -1;
+
+	if (ioctl(sun_fd, AUDIO_GETINFO, &ainf) == -1)
+		return -1;
+
+	/* FIXME: check if sample rate is supported */
+	return 0;
+}
+
+static int sun_device_exists(const char *dev)
+{
+	struct stat s;
+
+	if (stat(dev, &s))
+		return 0;
+	return 1;
+}
+
+static int sun_init(void)
+{
+	const char *audio_dev = "/dev/audio";
+
+	if (sun_audio_device != NULL) {
+		if (sun_device_exists(sun_audio_device))
+			return 0;
+		free(sun_audio_device);
+		sun_audio_device = NULL;
+		return -1;
+	}
+	if (sun_device_exists(audio_dev)) {
+		sun_audio_device = xstrdup(audio_dev);
+		return 0;
+	}
+
+	return -1;
+}
+
+static int sun_exit(void)
+{
+	if (sun_audio_device != NULL) {
+		free(sun_audio_device);
+		sun_audio_device = NULL;
+	}
+
+	return 0;
+}
+
+static int sun_close(void)
+{
+	if (sun_fd != -1) {
+		close(sun_fd);
+		sun_fd = -1;
+	}
+
+	return 0;
+}
+
+static int sun_open(sample_format_t sf, const channel_position_t *channel_map)
+{
+	sun_fd = open(sun_audio_device, O_WRONLY);
+	if (sun_fd == -1)
+		return -1;
+	if (sun_set_sf(sf) == -1) {
+		sun_close();
+		return -1;
+	}
+
+	return 0;
+}
+
+static int sun_write(const char *buf, int cnt)
+{
+	const char *t;
+
+	cnt /= 4;
+	cnt *= 4;
+	t = buf;
+	while (cnt > 0) {
+		int rc = write(sun_fd, buf, cnt);
+		if (rc == -1) {
+			if (errno == EINTR)
+				continue;
+			else
+				return rc;
+		}
+		buf += rc;
+		cnt -= rc;
+	}
+
+	return (buf - t);
+}
+
+static int sun_pause(void)
+{
+	struct audio_info ainf;
+
+	AUDIO_INITINFO(&ainf);
+
+	ainf.play.pause = 1;
+	if (ioctl(sun_fd, AUDIO_SETINFO, &ainf) == -1)
+		return -1;
+
+	return 0;
+}
+
+static int sun_unpause(void)
+{
+	struct audio_info ainf;
+
+	AUDIO_INITINFO(&ainf);
+
+	ainf.play.pause = 0;
+	if (ioctl(sun_fd, AUDIO_SETINFO, &ainf) == -1)
+		return -1;
+
+	return 0;
+}
+
+static int sun_buffer_space(void)
+{
+	struct audio_info ainf;
+	int sp;
+
+	AUDIO_INITINFO(&ainf);
+
+	if (ioctl(sun_fd, AUDIO_GETINFO, &ainf) == -1)
+		return -1;
+	sp = ainf.play.buffer_size;
+
+	return sp;
+}
+
+static int op_sun_set_device(const char *val)
+{
+	free(sun_audio_device);
+	sun_audio_device = xstrdup(val);
+	return 0;
+}
+
+static int op_sun_get_device(char **val)
+{
+	if (sun_audio_device)
+		*val = xstrdup(sun_audio_device);
+	return 0;
+}
+
+const struct output_plugin_ops op_pcm_ops = {
+	.init = sun_init,
+	.exit = sun_exit,
+	.open = sun_open,
+	.close = sun_close,
+	.write = sun_write,
+	.pause = sun_pause,
+	.unpause = sun_unpause,
+	.buffer_space = sun_buffer_space,
+};
+
+const struct output_plugin_opt op_pcm_options[] = {
+	OPT(op_sun, device),
+	{ NULL },
+};
+
+const int op_priority = 0;
+const unsigned op_abi_version = OP_ABI_VERSION;