*/
/**
* SECTION:element-fdsrc
- * @short_description: read from a unix file descriptor
* @see_also: #GstFdSink
*
* Read data from a unix file descriptor.
+ *
+ * To generate data, enter some data on the console folowed by enter.
+ * The above mentioned pipeline should dump data packets to the console.
+ *
+ * If the #GstFdSrc:timeout property is set to a value bigger than 0, fdsrc will
+ * generate an element message named
+ * <classname>"GstFdSrcTimeout"</classname>
+ * if no data was recieved in the given timeout.
+ * The message's structure contains one field:
+ * <itemizedlist>
+ * <listitem>
+ * <para>
+ * #guint64
+ * <classname>"timeout"</classname>: the timeout in microseconds that
+ * expired when waiting for data.
+ * </para>
+ * </listitem>
+ * </itemizedlist>
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * echo "Hello GStreamer" | gst-launch -v fdsrc ! fakesink dump=true
+ * ]| A simple pipeline to read from the standard input and dump the data
+ * with a fakesink as hex ascii block.
+ * </refsect2>
+ *
+ * Last reviewed on 2008-06-20 (0.10.21)
*/
-
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gst/gst_private.h"
#include <sys/types.h>
+
+#ifdef G_OS_WIN32
+#include <io.h> /* lseek, open, close, read */
+#undef lseek
+#define lseek _lseeki64
+#undef off_t
+#define off_t guint64
+#endif
+
#include <sys/stat.h>
+#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
+#endif
#include <fcntl.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef _MSC_VER
-#include <io.h>
+#undef stat
+#define stat _stat
+#define fstat _fstat
+#define S_ISREG(m) (((m)&S_IFREG)==S_IFREG)
#endif
#include <stdlib.h>
#include <errno.h>
#include "gstfdsrc.h"
-#define DEFAULT_BLOCKSIZE 4096
-
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_DEBUG_CATEGORY_STATIC (gst_fd_src_debug);
#define GST_CAT_DEFAULT gst_fd_src_debug
+#define DEFAULT_FD 0
+#define DEFAULT_TIMEOUT 0
+
enum
{
PROP_0,
+
PROP_FD,
+ PROP_TIMEOUT,
+
+ PROP_LAST
};
static void gst_fd_src_uri_handler_init (gpointer g_iface, gpointer iface_data);
-static void
-_do_init (GType fd_src_type)
-{
- static const GInterfaceInfo urihandler_info = {
- gst_fd_src_uri_handler_init,
- NULL,
- NULL
- };
-
- g_type_add_interface_static (fd_src_type, GST_TYPE_URI_HANDLER,
- &urihandler_info);
-
+#define _do_init \
+ G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_fd_src_uri_handler_init); \
GST_DEBUG_CATEGORY_INIT (gst_fd_src_debug, "fdsrc", 0, "fdsrc element");
-}
-
-GST_BOILERPLATE_FULL (GstFdSrc, gst_fd_src, GstPushSrc, GST_TYPE_PUSH_SRC,
- _do_init);
+#define gst_fd_src_parent_class parent_class
+G_DEFINE_TYPE_WITH_CODE (GstFdSrc, gst_fd_src, GST_TYPE_PUSH_SRC, _do_init);
static void gst_fd_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static gboolean gst_fd_src_is_seekable (GstBaseSrc * bsrc);
static gboolean gst_fd_src_get_size (GstBaseSrc * src, guint64 * size);
static gboolean gst_fd_src_do_seek (GstBaseSrc * src, GstSegment * segment);
+static gboolean gst_fd_src_query (GstBaseSrc * src, GstQuery ** query);
static GstFlowReturn gst_fd_src_create (GstPushSrc * psrc, GstBuffer ** outbuf);
static void
-gst_fd_src_base_init (gpointer g_class)
-{
- GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details_simple (gstelement_class,
- "Filedescriptor Source",
- "Source/File",
- "Read from a file descriptor", "Erik Walthinsen <omega@cse.ogi.edu>");
- gst_element_class_add_pad_template (gstelement_class,
- gst_static_pad_template_get (&srctemplate));
-}
-
-static void
gst_fd_src_class_init (GstFdSrcClass * klass)
{
GObjectClass *gobject_class;
- GstBaseSrcClass *gstbasesrc_class;
GstElementClass *gstelement_class;
+ GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpush_src_class;
gobject_class = G_OBJECT_CLASS (klass);
gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
gstpush_src_class = GST_PUSH_SRC_CLASS (klass);
- parent_class = g_type_class_peek_parent (klass);
-
gobject_class->set_property = gst_fd_src_set_property;
gobject_class->get_property = gst_fd_src_get_property;
gobject_class->dispose = gst_fd_src_dispose;
g_object_class_install_property (gobject_class, PROP_FD,
g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
- 0, G_MAXINT, 0, G_PARAM_READWRITE));
+ 0, G_MAXINT, DEFAULT_FD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ /**
+ * GstFdSrc:timeout
+ *
+ * Post a message after timeout microseconds
+ *
+ * Since: 0.10.21
+ */
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
+ g_param_spec_uint64 ("timeout", "Timeout",
+ "Post a message after timeout microseconds (0 = disabled)", 0,
+ G_MAXUINT64, DEFAULT_TIMEOUT,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ gst_element_class_set_details_simple (gstelement_class,
+ "Filedescriptor Source",
+ "Source/File",
+ "Read from a file descriptor", "Erik Walthinsen <omega@cse.ogi.edu>");
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&srctemplate));
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_fd_src_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_fd_src_stop);
gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_fd_src_is_seekable);
gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_fd_src_get_size);
gstbasesrc_class->do_seek = GST_DEBUG_FUNCPTR (gst_fd_src_do_seek);
+ gstbasesrc_class->query = GST_DEBUG_FUNCPTR (gst_fd_src_query);
gstpush_src_class->create = GST_DEBUG_FUNCPTR (gst_fd_src_create);
}
static void
-gst_fd_src_init (GstFdSrc * fdsrc, GstFdSrcClass * klass)
+gst_fd_src_init (GstFdSrc * fdsrc)
{
- fdsrc->fd = -1;
- fdsrc->new_fd = 0;
+ fdsrc->new_fd = DEFAULT_FD;
fdsrc->seekable_fd = FALSE;
+ fdsrc->fd = -1;
+ fdsrc->size = -1;
+ fdsrc->timeout = DEFAULT_TIMEOUT;
fdsrc->uri = g_strdup_printf ("fd://0");
fdsrc->curoffset = 0;
}
}
static void
-gst_fd_src_update_fd (GstFdSrc * src)
+gst_fd_src_update_fd (GstFdSrc * src, guint64 size)
{
struct stat stat_results;
+ GST_DEBUG_OBJECT (src, "fdset %p, old_fd %d, new_fd %d", src->fdset, src->fd,
+ src->new_fd);
+
/* we need to always update the fdset since it may not have existed when
- * gst_fd_src_update_fd() was called earlier */
+ * gst_fd_src_update_fd () was called earlier */
if (src->fdset != NULL) {
- GstPollFD fd = { 0, };
+ GstPollFD fd = GST_POLL_FD_INIT;
if (src->fd >= 0) {
fd.fd = src->fd;
+ /* this will log a harmless warning, if it was never added */
gst_poll_remove_fd (src->fdset, &fd);
}
- /* Reset the GstPollFD */
- memset (&fd, 0, sizeof (GstPollFD));
-
fd.fd = src->new_fd;
gst_poll_add_fd (src->fdset, &fd);
gst_poll_fd_ctl_read (src->fdset, &fd, TRUE);
}
+
if (src->fd != src->new_fd) {
GST_INFO_OBJECT (src, "Updating to fd %d", src->new_fd);
src->fd = src->new_fd;
+ GST_INFO_OBJECT (src, "Setting size to fd %" G_GUINT64_FORMAT, size);
+ src->size = size;
+
g_free (src->uri);
src->uri = g_strdup_printf ("fd://%d", src->fd);
src->curoffset = 0;
- if ((src->fdset = gst_poll_new (GST_POLL_MODE_AUTO, TRUE)) == NULL)
+ if ((src->fdset = gst_poll_new (TRUE)) == NULL)
goto socket_pair;
- gst_fd_src_update_fd (src);
+ gst_fd_src_update_fd (src, -1);
return TRUE;
GST_OBJECT_LOCK (object);
if (GST_STATE (GST_ELEMENT (src)) <= GST_STATE_READY) {
GST_DEBUG_OBJECT (src, "state ready or lower, updating to use new fd");
- gst_fd_src_update_fd (src);
+ gst_fd_src_update_fd (src, -1);
} else {
GST_DEBUG_OBJECT (src, "state above ready, not updating to new fd yet");
}
GST_OBJECT_UNLOCK (object);
break;
+ case PROP_TIMEOUT:
+ src->timeout = g_value_get_uint64 (value);
+ GST_DEBUG_OBJECT (src, "poll timeout set to %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (src->timeout));
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
case PROP_FD:
g_value_set_int (value, src->fd);
break;
+ case PROP_TIMEOUT:
+ g_value_set_uint64 (value, src->timeout);
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
GstBuffer *buf;
gssize readbytes;
guint blocksize;
+ GstClockTime timeout;
+ guint8 *data;
+ gsize maxsize;
#ifndef HAVE_WIN32
+ gboolean try_again;
gint retval;
#endif
src = GST_FD_SRC (psrc);
+ if (src->timeout > 0) {
+ timeout = src->timeout * GST_USECOND;
+ } else {
+ timeout = GST_CLOCK_TIME_NONE;
+ }
+
#ifndef HAVE_WIN32
do {
- retval = gst_poll_wait (src->fdset, GST_CLOCK_TIME_NONE);
- } while (retval == -1 && errno == EINTR);
-
- if (retval == -1) {
- if (errno == EBUSY)
- goto stopped;
- else
- goto select_error;
- }
+ try_again = FALSE;
+
+ GST_LOG_OBJECT (src, "doing poll, timeout %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (src->timeout));
+
+ retval = gst_poll_wait (src->fdset, timeout);
+ GST_LOG_OBJECT (src, "poll returned %d", retval);
+
+ if (G_UNLIKELY (retval == -1)) {
+ if (errno == EINTR || errno == EAGAIN) {
+ /* retry if interrupted */
+ try_again = TRUE;
+ } else if (errno == EBUSY) {
+ goto stopped;
+ } else {
+ goto poll_error;
+ }
+ } else if (G_UNLIKELY (retval == 0)) {
+ try_again = TRUE;
+ /* timeout, post element message */
+ gst_element_post_message (GST_ELEMENT_CAST (src),
+ gst_message_new_element (GST_OBJECT_CAST (src),
+ gst_structure_new ("GstFdSrcTimeout",
+ "timeout", G_TYPE_UINT64, src->timeout, NULL)));
+ }
+ } while (G_UNLIKELY (try_again)); /* retry if interrupted or timeout */
#endif
blocksize = GST_BASE_SRC (src)->blocksize;
/* create the buffer */
buf = gst_buffer_new_and_alloc (blocksize);
+ if (G_UNLIKELY (buf == NULL))
+ goto alloc_failed;
+
+ data = gst_buffer_map (buf, NULL, &maxsize, GST_MAP_WRITE);
do {
- readbytes = read (src->fd, GST_BUFFER_DATA (buf), blocksize);
+ readbytes = read (src->fd, data, blocksize);
GST_LOG_OBJECT (src, "read %" G_GSSIZE_FORMAT, readbytes);
} while (readbytes == -1 && errno == EINTR); /* retry if interrupted */
if (readbytes < 0)
goto read_error;
+ gst_buffer_unmap (buf, data, readbytes);
+
if (readbytes == 0)
goto eos;
GST_BUFFER_OFFSET (buf) = src->curoffset;
- GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
src->curoffset += readbytes;
/* ERRORS */
#ifndef HAVE_WIN32
-select_error:
+poll_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
- ("select on file descriptor: %s.", g_strerror (errno)));
- GST_DEBUG_OBJECT (psrc, "Error during select");
+ ("poll on file descriptor: %s.", g_strerror (errno)));
+ GST_DEBUG_OBJECT (psrc, "Error during poll");
return GST_FLOW_ERROR;
}
stopped:
{
- GST_DEBUG_OBJECT (psrc, "Select stopped");
+ GST_DEBUG_OBJECT (psrc, "Poll stopped");
return GST_FLOW_WRONG_STATE;
}
#endif
+alloc_failed:
+ {
+ GST_ERROR_OBJECT (src, "Failed to allocate %u bytes", blocksize);
+ return GST_FLOW_ERROR;
+ }
eos:
{
GST_DEBUG_OBJECT (psrc, "Read 0 bytes. EOS.");
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("read on file descriptor: %s.", g_strerror (errno)));
GST_DEBUG_OBJECT (psrc, "Error reading from fd");
+ gst_buffer_unmap (buf, data, 0);
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
-gboolean
+static gboolean
+gst_fd_src_query (GstBaseSrc * basesrc, GstQuery ** query)
+{
+ gboolean ret = FALSE;
+ GstFdSrc *src = GST_FD_SRC (basesrc);
+
+ switch (GST_QUERY_TYPE (*query)) {
+ case GST_QUERY_URI:
+ gst_query_set_uri (*query, src->uri);
+ ret = TRUE;
+ break;
+ default:
+ ret = FALSE;
+ break;
+ }
+
+ if (!ret)
+ ret = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
+
+ return ret;
+}
+
+static gboolean
gst_fd_src_is_seekable (GstBaseSrc * bsrc)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
return src->seekable_fd;
}
-gboolean
+static gboolean
gst_fd_src_get_size (GstBaseSrc * bsrc, guint64 * size)
{
GstFdSrc *src = GST_FD_SRC (bsrc);
struct stat stat_results;
+ if (src->size != -1) {
+ *size = src->size;
+ return TRUE;
+ }
+
if (!src->seekable_fd) {
/* If it isn't seekable, we won't know the length (but fstat will still
* succeed, and wrongly say our length is zero. */
}
}
-gboolean
+static gboolean
gst_fd_src_do_seek (GstBaseSrc * bsrc, GstSegment * segment)
{
gint res;
if (G_UNLIKELY (res < 0 || res != offset))
goto seek_failed;
- segment->last_stop = segment->start;
+ segment->position = segment->start;
segment->time = segment->start;
return TRUE;
{
return GST_URI_SRC;
}
+
static gchar **
gst_fd_src_uri_get_protocols (void)
{
- static gchar *protocols[] = { "fd", NULL };
+ static gchar *protocols[] = { (char *) "fd", NULL };
return protocols;
}
+
static const gchar *
gst_fd_src_uri_get_uri (GstURIHandler * handler)
{
static gboolean
gst_fd_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
- gchar *protocol;
+ gchar *protocol, *q;
GstFdSrc *src = GST_FD_SRC (handler);
gint fd;
+ guint64 size = -1;
+
+ GST_INFO_OBJECT (src, "checking uri %s", uri);
protocol = gst_uri_get_protocol (uri);
if (strcmp (protocol, "fd") != 0) {
if (sscanf (uri, "fd://%d", &fd) != 1 || fd < 0)
return FALSE;
+ if ((q = g_strstr_len (uri, -1, "?"))) {
+ gchar *sp;
+
+ GST_INFO_OBJECT (src, "found ?");
+
+ if ((sp = g_strstr_len (q, -1, "size="))) {
+ if (sscanf (sp, "size=%" G_GUINT64_FORMAT, &size) != 1) {
+ GST_INFO_OBJECT (src, "parsing size failed");
+ size = -1;
+ } else {
+ GST_INFO_OBJECT (src, "found size %" G_GUINT64_FORMAT, size);
+ }
+ }
+ }
+
src->new_fd = fd;
GST_OBJECT_LOCK (src);
if (GST_STATE (GST_ELEMENT (src)) <= GST_STATE_READY) {
- gst_fd_src_update_fd (src);
+ gst_fd_src_update_fd (src, size);
}
GST_OBJECT_UNLOCK (src);
projects / platform / upstream / gstreamer.git / blobdiff