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-rw-r--r--src/modules/module-detect.c272
1 files changed, 272 insertions, 0 deletions
diff --git a/src/modules/module-detect.c b/src/modules/module-detect.c
new file mode 100644
index 0000000..230cd9d
--- /dev/null
+++ b/src/modules/module-detect.c
@@ -0,0 +1,272 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2006 Lennart Poettering
+ Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+ Copyright 2006 Diego Pettenò
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of the License,
+ or (at your option) any later version.
+
+ PulseAudio 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 Lesser General Public License
+ along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/module.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/macro.h>
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("Detect available audio hardware and load matching drivers");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(true);
+PA_MODULE_USAGE("just-one=<boolean>");
+
+#ifdef __linux__
+PA_MODULE_DEPRECATED("Please use module-udev-detect instead of module-detect!");
+#endif
+
+static const char* const valid_modargs[] = {
+ "just-one",
+ NULL
+};
+
+#ifdef HAVE_ALSA
+
+static int detect_alsa(pa_core *c, int just_one) {
+ FILE *f;
+ int n = 0, n_sink = 0, n_source = 0;
+
+ if (!(f = pa_fopen_cloexec("/proc/asound/devices", "r"))) {
+
+ if (errno != ENOENT)
+ pa_log_error("open(\"/proc/asound/devices\") failed: %s", pa_cstrerror(errno));
+
+ return -1;
+ }
+
+ while (!feof(f)) {
+ char line[64], args[64];
+ unsigned device, subdevice;
+ int is_sink;
+ pa_module *m = NULL;
+
+ if (!fgets(line, sizeof(line), f))
+ break;
+
+ line[strcspn(line, "\r\n")] = 0;
+
+ if (pa_endswith(line, "digital audio playback"))
+ is_sink = 1;
+ else if (pa_endswith(line, "digital audio capture"))
+ is_sink = 0;
+ else
+ continue;
+
+ if (just_one && is_sink && n_sink >= 1)
+ continue;
+
+ if (just_one && !is_sink && n_source >= 1)
+ continue;
+
+ if (sscanf(line, " %*i: [%u- %u]: ", &device, &subdevice) != 2)
+ continue;
+
+ /* Only one sink per device */
+ if (subdevice != 0)
+ continue;
+
+ pa_snprintf(args, sizeof(args), "device_id=%u", device);
+ if (pa_module_load(&m, c, is_sink ? "module-alsa-sink" : "module-alsa-source", args) < 0)
+ continue;
+
+ n++;
+
+ if (is_sink)
+ n_sink++;
+ else
+ n_source++;
+ }
+
+ fclose(f);
+
+ return n;
+}
+#endif
+
+#ifdef HAVE_OSS_OUTPUT
+static int detect_oss(pa_core *c, int just_one) {
+ FILE *f;
+ int n = 0, b = 0;
+
+ if (!(f = pa_fopen_cloexec("/dev/sndstat", "r")) &&
+ !(f = pa_fopen_cloexec("/proc/sndstat", "r")) &&
+ !(f = pa_fopen_cloexec("/proc/asound/oss/sndstat", "r"))) {
+
+ if (errno != ENOENT)
+ pa_log_error("failed to open OSS sndstat device: %s", pa_cstrerror(errno));
+
+ return -1;
+ }
+
+ while (!feof(f)) {
+ char line[256], args[64];
+ unsigned device;
+ pa_module *m = NULL;
+
+ if (!fgets(line, sizeof(line), f))
+ break;
+
+ line[strcspn(line, "\r\n")] = 0;
+
+ if (!b) {
+ b = pa_streq(line, "Audio devices:") || pa_streq(line, "Installed devices:");
+ continue;
+ }
+
+ if (line[0] == 0)
+ break;
+
+ if (sscanf(line, "%u: ", &device) == 1) {
+ if (device == 0)
+ pa_snprintf(args, sizeof(args), "device=/dev/dsp");
+ else
+ pa_snprintf(args, sizeof(args), "device=/dev/dsp%u", device);
+
+ if (pa_module_load(&m, c, "module-oss", args) < 0)
+ continue;
+
+ } else if (sscanf(line, "pcm%u: ", &device) == 1) {
+ /* FreeBSD support, the devices are named /dev/dsp0.0, dsp0.1 and so on */
+ pa_snprintf(args, sizeof(args), "device=/dev/dsp%u.0", device);
+
+ if (pa_module_load(&m, c, "module-oss", args) < 0)
+ continue;
+ }
+
+ n++;
+
+ if (just_one)
+ break;
+ }
+
+ fclose(f);
+ return n;
+}
+#endif
+
+#ifdef HAVE_SOLARIS
+static int detect_solaris(pa_core *c, int just_one) {
+ struct stat s;
+ const char *dev;
+ char args[64];
+ pa_module *m = NULL;
+
+ dev = getenv("AUDIODEV");
+ if (!dev)
+ dev = "/dev/audio";
+
+ if (stat(dev, &s) < 0) {
+ if (errno != ENOENT)
+ pa_log_error("failed to open device %s: %s", dev, pa_cstrerror(errno));
+ return -1;
+ }
+
+ if (!S_ISCHR(s.st_mode))
+ return 0;
+
+ pa_snprintf(args, sizeof(args), "device=%s", dev);
+
+ if (pa_module_load(&m, c, "module-solaris", args) < 0)
+ return 0;
+
+ return 1;
+}
+#endif
+
+#ifdef OS_IS_WIN32
+static int detect_waveout(pa_core *c, int just_one) {
+ pa_module *m = NULL;
+ /*
+ * FIXME: No point in enumerating devices until the plugin supports
+ * selecting anything but the first.
+ */
+ if (pa_module_load(&m, c, "module-waveout", "") < 0)
+ return 0;
+
+ return 1;
+}
+#endif
+
+int pa__init(pa_module*m) {
+ bool just_one = false;
+ int n = 0;
+ pa_modargs *ma;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments");
+ goto fail;
+ }
+
+ if (pa_modargs_get_value_boolean(ma, "just-one", &just_one) < 0) {
+ pa_log("just_one= expects a boolean argument.");
+ goto fail;
+ }
+
+#ifdef HAVE_ALSA
+ if ((n = detect_alsa(m->core, just_one)) <= 0)
+#endif
+#ifdef HAVE_OSS_OUTPUT
+ if ((n = detect_oss(m->core, just_one)) <= 0)
+#endif
+#ifdef HAVE_SOLARIS
+ if ((n = detect_solaris(m->core, just_one)) <= 0)
+#endif
+#ifdef OS_IS_WIN32
+ if ((n = detect_waveout(m->core, just_one)) <= 0)
+#endif
+ {
+ pa_log_warn("failed to detect any sound hardware.");
+ goto fail;
+ }
+
+ pa_log_info("loaded %i modules.", n);
+
+ /* We were successful and can unload ourselves now. */
+ pa_module_unload_request(m, true);
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (ma)
+ pa_modargs_free(ma);
+
+ return -1;
+}
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