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-rwxr-xr-xsys/oss4/oss4-source.c546
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diff --git a/sys/oss4/oss4-source.c b/sys/oss4/oss4-source.c
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+/* GStreamer OSS4 audio source
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/**
+ * SECTION:element-oss4src
+ *
+ * This element lets you record sound using the Open Sound System (OSS)
+ * version 4.
+ *
+ * <refsect2>
+ * <title>Example pipelines</title>
+ * |[
+ * gst-launch-1.0 -v oss4src ! queue ! audioconvert ! vorbisenc ! oggmux ! filesink location=mymusic.ogg
+ * ]| will record sound from your sound card using OSS4 and encode it to an
+ * Ogg/Vorbis file (this will only work if your mixer settings are right
+ * and the right inputs areenabled etc.)
+ * </refsect2>
+ */
+
+/* FIXME: make sure we're not doing ioctls from the app thread (e.g. via the
+ * mixer interface) while recording */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <gst/gst-i18n-plugin.h>
+
+#define NO_LEGACY_MIXER
+#include "oss4-audio.h"
+#include "oss4-source.h"
+#include "oss4-property-probe.h"
+#include "oss4-soundcard.h"
+
+#define GST_OSS4_SOURCE_IS_OPEN(src) (GST_OSS4_SOURCE(src)->fd != -1)
+
+GST_DEBUG_CATEGORY_EXTERN (oss4src_debug);
+#define GST_CAT_DEFAULT oss4src_debug
+
+#define DEFAULT_DEVICE NULL
+#define DEFAULT_DEVICE_NAME NULL
+
+enum
+{
+ PROP_0,
+ PROP_DEVICE,
+ PROP_DEVICE_NAME
+};
+
+#define gst_oss4_source_parent_class parent_class
+G_DEFINE_TYPE (GstOss4Source, gst_oss4_source, GST_TYPE_AUDIO_SRC);
+
+static void gst_oss4_source_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static void gst_oss4_source_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+
+static void gst_oss4_source_dispose (GObject * object);
+static void gst_oss4_source_finalize (GstOss4Source * osssrc);
+
+static GstCaps *gst_oss4_source_getcaps (GstBaseSrc * bsrc, GstCaps * filter);
+
+static gboolean gst_oss4_source_open (GstAudioSrc * asrc,
+ gboolean silent_errors);
+static gboolean gst_oss4_source_open_func (GstAudioSrc * asrc);
+static gboolean gst_oss4_source_close (GstAudioSrc * asrc);
+static gboolean gst_oss4_source_prepare (GstAudioSrc * asrc,
+ GstAudioRingBufferSpec * spec);
+static gboolean gst_oss4_source_unprepare (GstAudioSrc * asrc);
+static guint gst_oss4_source_read (GstAudioSrc * asrc, gpointer data,
+ guint length, GstClockTime * timestamp);
+static guint gst_oss4_source_delay (GstAudioSrc * asrc);
+static void gst_oss4_source_reset (GstAudioSrc * asrc);
+
+static void
+gst_oss4_source_class_init (GstOss4SourceClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBaseSrcClass *gstbasesrc_class;
+ GstAudioSrcClass *gstaudiosrc_class;
+ GstPadTemplate *templ;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+ gstbasesrc_class = (GstBaseSrcClass *) klass;
+ gstaudiosrc_class = (GstAudioSrcClass *) klass;
+
+ gobject_class->dispose = gst_oss4_source_dispose;
+ gobject_class->finalize = (GObjectFinalizeFunc) gst_oss4_source_finalize;
+ gobject_class->get_property = gst_oss4_source_get_property;
+ gobject_class->set_property = gst_oss4_source_set_property;
+
+ gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_oss4_source_getcaps);
+
+ gstaudiosrc_class->open = GST_DEBUG_FUNCPTR (gst_oss4_source_open_func);
+ gstaudiosrc_class->prepare = GST_DEBUG_FUNCPTR (gst_oss4_source_prepare);
+ gstaudiosrc_class->unprepare = GST_DEBUG_FUNCPTR (gst_oss4_source_unprepare);
+ gstaudiosrc_class->close = GST_DEBUG_FUNCPTR (gst_oss4_source_close);
+ gstaudiosrc_class->read = GST_DEBUG_FUNCPTR (gst_oss4_source_read);
+ gstaudiosrc_class->delay = GST_DEBUG_FUNCPTR (gst_oss4_source_delay);
+ gstaudiosrc_class->reset = GST_DEBUG_FUNCPTR (gst_oss4_source_reset);
+
+ g_object_class_install_property (gobject_class, PROP_DEVICE,
+ g_param_spec_string ("device", "Device",
+ "OSS4 device (e.g. /dev/oss/hdaudio0/pcm0 or /dev/dspN) "
+ "(NULL = use first available device)",
+ DEFAULT_DEVICE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
+ g_param_spec_string ("device-name", "Device name",
+ "Human-readable name of the sound device", DEFAULT_DEVICE_NAME,
+ G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+ gst_element_class_set_static_metadata (gstelement_class,
+ "OSS v4 Audio Source", "Source/Audio",
+ "Capture from a sound card via OSS version 4",
+ "Tim-Philipp Müller <tim centricular net>");
+
+ templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ gst_oss4_audio_get_template_caps ());
+ gst_element_class_add_pad_template (gstelement_class, templ);
+}
+
+static void
+gst_oss4_source_init (GstOss4Source * osssrc)
+{
+ const gchar *device;
+
+ device = g_getenv ("AUDIODEV");
+ if (device == NULL)
+ device = DEFAULT_DEVICE;
+
+ osssrc->fd = -1;
+ osssrc->device = g_strdup (device);
+ osssrc->device_name = g_strdup (DEFAULT_DEVICE_NAME);
+ osssrc->device_name = NULL;
+}
+
+static void
+gst_oss4_source_finalize (GstOss4Source * oss)
+{
+ g_free (oss->device);
+ oss->device = NULL;
+
+ G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (oss));
+}
+
+static void
+gst_oss4_source_dispose (GObject * object)
+{
+ GstOss4Source *oss = GST_OSS4_SOURCE (object);
+
+ if (oss->probed_caps) {
+ gst_caps_unref (oss->probed_caps);
+ oss->probed_caps = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_oss4_source_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstOss4Source *oss;
+
+ oss = GST_OSS4_SOURCE (object);
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+ GST_OBJECT_LOCK (oss);
+ if (oss->fd == -1) {
+ g_free (oss->device);
+ oss->device = g_value_dup_string (value);
+ g_free (oss->device_name);
+ oss->device_name = NULL;
+ } else {
+ g_warning ("%s: can't change \"device\" property while audio source "
+ "is open", GST_OBJECT_NAME (oss));
+ }
+ GST_OBJECT_UNLOCK (oss);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_oss4_source_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstOss4Source *oss;
+
+ oss = GST_OSS4_SOURCE (object);
+
+ switch (prop_id) {
+ case PROP_DEVICE:
+ GST_OBJECT_LOCK (oss);
+ g_value_set_string (value, oss->device);
+ GST_OBJECT_UNLOCK (oss);
+ break;
+ case PROP_DEVICE_NAME:
+ GST_OBJECT_LOCK (oss);
+ /* If device is set, try to retrieve the name even if we're not open */
+ if (oss->fd == -1 && oss->device != NULL) {
+ if (gst_oss4_source_open (GST_AUDIO_SRC (oss), TRUE)) {
+ g_value_set_string (value, oss->device_name);
+ gst_oss4_source_close (GST_AUDIO_SRC (oss));
+ } else {
+ gchar *name = NULL;
+
+ gst_oss4_property_probe_find_device_name_nofd (GST_OBJECT (oss),
+ oss->device, &name);
+ g_value_set_string (value, name);
+ g_free (name);
+ }
+ } else {
+ g_value_set_string (value, oss->device_name);
+ }
+
+ GST_OBJECT_UNLOCK (oss);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstCaps *
+gst_oss4_source_getcaps (GstBaseSrc * bsrc, GstCaps * filter)
+{
+ GstOss4Source *oss;
+ GstCaps *caps;
+
+ oss = GST_OSS4_SOURCE (bsrc);
+
+ if (oss->fd == -1) {
+ caps = gst_oss4_audio_get_template_caps ();
+ } else if (oss->probed_caps) {
+ caps = gst_caps_copy (oss->probed_caps);
+ } else {
+ caps = gst_oss4_audio_probe_caps (GST_OBJECT (oss), oss->fd);
+ if (caps != NULL && !gst_caps_is_empty (caps)) {
+ oss->probed_caps = gst_caps_copy (caps);
+ }
+ }
+
+ if (filter && caps) {
+ GstCaps *intersection;
+
+ intersection =
+ gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
+ gst_caps_unref (caps);
+ return intersection;
+ } else {
+ return caps;
+ }
+}
+
+/* note: we must not take the object lock here unless we fix up get_property */
+static gboolean
+gst_oss4_source_open (GstAudioSrc * asrc, gboolean silent_errors)
+{
+ GstOss4Source *oss;
+ gchar *device;
+ int mode;
+
+ oss = GST_OSS4_SOURCE (asrc);
+
+ if (oss->device)
+ device = g_strdup (oss->device);
+ else
+ device = gst_oss4_audio_find_device (GST_OBJECT_CAST (oss));
+
+ /* desperate times, desperate measures */
+ if (device == NULL)
+ device = g_strdup ("/dev/dsp0");
+
+ GST_INFO_OBJECT (oss, "Trying to open OSS4 device '%s'", device);
+
+ /* we open in non-blocking mode even if we don't really want to do writes
+ * non-blocking because we can't be sure that this is really a genuine
+ * OSS4 device with well-behaved drivers etc. We really don't want to
+ * hang forever under any circumstances. */
+ oss->fd = open (device, O_RDONLY | O_NONBLOCK, 0);
+ if (oss->fd == -1) {
+ switch (errno) {
+ case EBUSY:
+ goto busy;
+ case EACCES:
+ goto no_permission;
+ default:
+ goto open_failed;
+ }
+ }
+
+ GST_INFO_OBJECT (oss, "Opened device");
+
+ /* Make sure it's OSS4. If it's old OSS, let osssink handle it */
+ if (!gst_oss4_audio_check_version (GST_OBJECT_CAST (oss), oss->fd))
+ goto legacy_oss;
+
+ /* now remove the non-blocking flag. */
+ mode = fcntl (oss->fd, F_GETFL);
+ mode &= ~O_NONBLOCK;
+ if (fcntl (oss->fd, F_SETFL, mode) < 0) {
+ /* some drivers do no support unsetting the non-blocking flag, try to
+ * close/open the device then. This is racy but we error out properly. */
+ GST_WARNING_OBJECT (oss, "failed to unset O_NONBLOCK (buggy driver?), "
+ "will try to re-open device now");
+ gst_oss4_source_close (asrc);
+ if ((oss->fd = open (device, O_RDONLY, 0)) == -1)
+ goto non_block;
+ }
+
+ oss->open_device = device;
+
+ /* not using ENGINEINFO here because it sometimes returns a different and
+ * less useful name than AUDIOINFO for the same device */
+ if (!gst_oss4_property_probe_find_device_name (GST_OBJECT (oss), oss->fd,
+ oss->open_device, &oss->device_name)) {
+ oss->device_name = NULL;
+ }
+
+ return TRUE;
+
+ /* ERRORS */
+busy:
+ {
+ if (!silent_errors) {
+ GST_ELEMENT_ERROR (oss, RESOURCE, BUSY,
+ (_("Could not open audio device for playback. "
+ "Device is being used by another application.")), (NULL));
+ }
+ g_free (device);
+ return FALSE;
+ }
+no_permission:
+ {
+ if (!silent_errors) {
+ GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
+ (_("Could not open audio device for playback. "
+ "You don't have permission to open the device.")),
+ GST_ERROR_SYSTEM);
+ }
+ g_free (device);
+ return FALSE;
+ }
+open_failed:
+ {
+ if (!silent_errors) {
+ GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
+ (_("Could not open audio device for playback.")), GST_ERROR_SYSTEM);
+ }
+ g_free (device);
+ return FALSE;
+ }
+legacy_oss:
+ {
+ gst_oss4_source_close (asrc);
+ if (!silent_errors) {
+ GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
+ (_("Could not open audio device for playback. "
+ "This version of the Open Sound System is not supported by this "
+ "element.")), ("Try the 'osssink' element instead"));
+ }
+ g_free (device);
+ return FALSE;
+ }
+non_block:
+ {
+ if (!silent_errors) {
+ GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL),
+ ("Unable to set device %s into non-blocking mode: %s",
+ oss->device, g_strerror (errno)));
+ }
+ g_free (device);
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_oss4_source_open_func (GstAudioSrc * asrc)
+{
+ return gst_oss4_source_open (asrc, FALSE);
+}
+
+static gboolean
+gst_oss4_source_close (GstAudioSrc * asrc)
+{
+ GstOss4Source *oss;
+
+ oss = GST_OSS4_SOURCE (asrc);
+
+ if (oss->fd != -1) {
+ GST_DEBUG_OBJECT (oss, "closing device");
+ close (oss->fd);
+ oss->fd = -1;
+ }
+
+ oss->bytes_per_sample = 0;
+
+ gst_caps_replace (&oss->probed_caps, NULL);
+
+ g_free (oss->open_device);
+ oss->open_device = NULL;
+
+ g_free (oss->device_name);
+ oss->device_name = NULL;
+
+ return TRUE;
+}
+
+static gboolean
+gst_oss4_source_prepare (GstAudioSrc * asrc, GstAudioRingBufferSpec * spec)
+{
+ GstOss4Source *oss;
+
+ oss = GST_OSS4_SOURCE (asrc);
+
+ if (!gst_oss4_audio_set_format (GST_OBJECT_CAST (oss), oss->fd, spec)) {
+ GST_WARNING_OBJECT (oss, "Couldn't set requested format %" GST_PTR_FORMAT,
+ spec->caps);
+ return FALSE;
+ }
+
+ oss->bytes_per_sample = GST_AUDIO_INFO_BPF (&spec->info);
+
+ return TRUE;
+}
+
+static gboolean
+gst_oss4_source_unprepare (GstAudioSrc * asrc)
+{
+ /* could do a SNDCTL_DSP_HALT, but the OSS manual recommends a close/open,
+ * since HALT won't properly reset some devices, apparently */
+
+ if (!gst_oss4_source_close (asrc))
+ goto couldnt_close;
+
+ if (!gst_oss4_source_open_func (asrc))
+ goto couldnt_reopen;
+
+ return TRUE;
+
+ /* ERRORS */
+couldnt_close:
+ {
+ GST_DEBUG_OBJECT (asrc, "Couldn't close the audio device");
+ return FALSE;
+ }
+couldnt_reopen:
+ {
+ GST_DEBUG_OBJECT (asrc, "Couldn't reopen the audio device");
+ return FALSE;
+ }
+}
+
+static guint
+gst_oss4_source_read (GstAudioSrc * asrc, gpointer data, guint length,
+ GstClockTime * timestamp)
+{
+ GstOss4Source *oss;
+ int n;
+
+ oss = GST_OSS4_SOURCE_CAST (asrc);
+
+ n = read (oss->fd, data, length);
+ GST_LOG_OBJECT (asrc, "%u bytes, %u samples", n, n / oss->bytes_per_sample);
+
+ if (G_UNLIKELY (n < 0)) {
+ switch (errno) {
+ case ENOTSUP:
+ case EACCES:{
+ /* This is the most likely cause, I think */
+ GST_ELEMENT_ERROR (asrc, RESOURCE, READ,
+ (_("Recording is not supported by this audio device.")),
+ ("read: %s (device: %s) (maybe this is an output-only device?)",
+ g_strerror (errno), oss->open_device));
+ break;
+ }
+ default:{
+ GST_ELEMENT_ERROR (asrc, RESOURCE, READ,
+ (_("Error recording from audio device.")),
+ ("read: %s (device: %s)", g_strerror (errno), oss->open_device));
+ break;
+ }
+ }
+ }
+
+ return (guint) n;
+}
+
+static guint
+gst_oss4_source_delay (GstAudioSrc * asrc)
+{
+ audio_buf_info info = { 0, };
+ GstOss4Source *oss;
+ guint delay;
+
+ oss = GST_OSS4_SOURCE_CAST (asrc);
+
+ if (ioctl (oss->fd, SNDCTL_DSP_GETISPACE, &info) == -1) {
+ GST_LOG_OBJECT (oss, "GETISPACE failed: %s", g_strerror (errno));
+ return 0;
+ }
+
+ delay = (info.fragstotal * info.fragsize) - info.bytes;
+ GST_LOG_OBJECT (oss, "fragstotal:%d, fragsize:%d, bytes:%d, delay:%d",
+ info.fragstotal, info.fragsize, info.bytes, delay);
+ return delay;
+}
+
+static void
+gst_oss4_source_reset (GstAudioSrc * asrc)
+{
+ /* There's nothing we can do here really: OSS can't handle access to the
+ * same device/fd from multiple threads and might deadlock or blow up in
+ * other ways if we try an ioctl SNDCTL_DSP_HALT or similar */
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 12:35:45 +0000