/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
+ * 2005 Philippe Khalaf <burger@speedy.org>
*
- * gstfdsrc.c:
+ * gstfdsrc.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
+/**
+ * SECTION:element-fdsrc
+ * @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
+#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>
+#include "gstfdsrc.h"
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS_ANY);
-GstElementDetails gst_fdsrc_details = {
- "Disk Source",
- "Source/File",
- "Synchronous read from a file",
- VERSION,
- "Erik Walthinsen <omega@cse.ogi.edu>",
- "(C) 1999",
-};
+GST_DEBUG_CATEGORY_STATIC (gst_fd_src_debug);
+#define GST_CAT_DEFAULT gst_fd_src_debug
+#define DEFAULT_FD 0
+#define DEFAULT_TIMEOUT 0
-/* FdSrc signals and args */
-enum {
- /* FILL ME */
- LAST_SIGNAL
-};
+enum
+{
+ PROP_0,
-enum {
- ARG_0,
- ARG_LOCATION,
- ARG_BYTESPERREAD,
- ARG_OFFSET,
+ PROP_FD,
+ PROP_TIMEOUT,
+
+ PROP_LAST
};
+static void gst_fd_src_uri_handler_init (gpointer g_iface, gpointer iface_data);
-static void gst_fdsrc_class_init (GstFdSrcClass *klass);
-static void gst_fdsrc_init (GstFdSrc *fdsrc);
+#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");
+#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_fdsrc_set_property (GObject *object, guint prop_id,
- const GValue *value, GParamSpec *pspec);
-static void gst_fdsrc_get_property (GObject *object, guint prop_id,
- GValue *value, GParamSpec *pspec);
+static void gst_fd_src_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_fd_src_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static void gst_fd_src_dispose (GObject * obj);
-static GstBuffer * gst_fdsrc_get (GstPad *pad);
+static gboolean gst_fd_src_start (GstBaseSrc * bsrc);
+static gboolean gst_fd_src_stop (GstBaseSrc * bsrc);
+static gboolean gst_fd_src_unlock (GstBaseSrc * bsrc);
+static gboolean gst_fd_src_unlock_stop (GstBaseSrc * bsrc);
+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 GstElementClass *parent_class = NULL;
-/*static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };*/
+static void
+gst_fd_src_class_init (GstFdSrcClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBaseSrcClass *gstbasesrc_class;
+ GstPushSrcClass *gstpush_src_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+ gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
+ gstpush_src_class = GST_PUSH_SRC_CLASS (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, 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->unlock = GST_DEBUG_FUNCPTR (gst_fd_src_unlock);
+ gstbasesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_fd_src_unlock_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);
+}
-GType
-gst_fdsrc_get_type (void)
+static void
+gst_fd_src_init (GstFdSrc * fdsrc)
{
- static GType fdsrc_type = 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;
+}
- if (!fdsrc_type) {
- static const GTypeInfo fdsrc_info = {
- sizeof(GstFdSrcClass), NULL,
- NULL,
- (GClassInitFunc)gst_fdsrc_class_init,
- NULL,
- NULL,
- sizeof(GstFdSrc),
- 0,
- (GInstanceInitFunc)gst_fdsrc_init,
- };
- fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
- }
- return fdsrc_type;
+static void
+gst_fd_src_dispose (GObject * obj)
+{
+ GstFdSrc *src = GST_FD_SRC (obj);
+
+ g_free (src->uri);
+ src->uri = NULL;
+
+ G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
-gst_fdsrc_class_init (GstFdSrcClass *klass)
+gst_fd_src_update_fd (GstFdSrc * src, guint64 size)
{
- GObjectClass *gobject_class;
+ 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 */
+ if (src->fdset != NULL) {
+ 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);
+ }
+
+ fd.fd = src->new_fd;
+ gst_poll_add_fd (src->fdset, &fd);
+ gst_poll_fd_ctl_read (src->fdset, &fd, TRUE);
+ }
+
- gobject_class = (GObjectClass*)klass;
+ if (src->fd != src->new_fd) {
+ GST_INFO_OBJECT (src, "Updating to fd %d", src->new_fd);
- parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+ src->fd = src->new_fd;
- gst_element_class_install_std_props (
- GST_ELEMENT_CLASS (klass),
- "location", ARG_LOCATION, G_PARAM_WRITABLE,
- "bytesperread", ARG_BYTESPERREAD, G_PARAM_READWRITE,
- "offset", ARG_OFFSET, G_PARAM_READABLE,
- NULL);
+ GST_INFO_OBJECT (src, "Setting size to fd %" G_GUINT64_FORMAT, size);
+ src->size = size;
- gobject_class->set_property = gst_fdsrc_set_property;
- gobject_class->get_property = gst_fdsrc_get_property;
+ g_free (src->uri);
+ src->uri = g_strdup_printf ("fd://%d", src->fd);
+
+ if (fstat (src->fd, &stat_results) < 0)
+ goto not_seekable;
+
+ if (!S_ISREG (stat_results.st_mode))
+ goto not_seekable;
+
+ /* Try a seek of 0 bytes offset to check for seekability */
+ if (lseek (src->fd, 0, SEEK_CUR) < 0)
+ goto not_seekable;
+
+ GST_INFO_OBJECT (src, "marking fd %d as seekable", src->fd);
+ src->seekable_fd = TRUE;
+ }
+ return;
+
+not_seekable:
+ {
+ GST_INFO_OBJECT (src, "marking fd %d as NOT seekable", src->fd);
+ src->seekable_fd = FALSE;
+ }
}
-static void gst_fdsrc_init(GstFdSrc *fdsrc) {
- fdsrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
- gst_pad_set_get_function(fdsrc->srcpad,gst_fdsrc_get);
- gst_element_add_pad(GST_ELEMENT(fdsrc),fdsrc->srcpad);
+static gboolean
+gst_fd_src_start (GstBaseSrc * bsrc)
+{
+ GstFdSrc *src = GST_FD_SRC (bsrc);
- fdsrc->fd = 0;
- fdsrc->curoffset = 0;
- fdsrc->bytes_per_read = 4096;
- fdsrc->seq = 0;
+ src->curoffset = 0;
+
+ if ((src->fdset = gst_poll_new (TRUE)) == NULL)
+ goto socket_pair;
+
+ gst_fd_src_update_fd (src, -1);
+
+ return TRUE;
+
+ /* ERRORS */
+socket_pair:
+ {
+ GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
+ GST_ERROR_SYSTEM);
+ return FALSE;
+ }
}
+static gboolean
+gst_fd_src_stop (GstBaseSrc * bsrc)
+{
+ GstFdSrc *src = GST_FD_SRC (bsrc);
+
+ if (src->fdset) {
+ gst_poll_free (src->fdset);
+ src->fdset = NULL;
+ }
+
+ return TRUE;
+}
-static void
-gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+static gboolean
+gst_fd_src_unlock (GstBaseSrc * bsrc)
{
- GstFdSrc *src;
- int fd;
+ GstFdSrc *src = GST_FD_SRC (bsrc);
+
+ GST_LOG_OBJECT (src, "Flushing");
+ GST_OBJECT_LOCK (src);
+ gst_poll_set_flushing (src->fdset, TRUE);
+ GST_OBJECT_UNLOCK (src);
- /* it's not null if we got it, but it might not be ours */
- g_return_if_fail (GST_IS_FDSRC (object));
-
- src = GST_FDSRC (object);
+ return TRUE;
+}
+
+static gboolean
+gst_fd_src_unlock_stop (GstBaseSrc * bsrc)
+{
+ GstFdSrc *src = GST_FD_SRC (bsrc);
+
+ GST_LOG_OBJECT (src, "No longer flushing");
+ GST_OBJECT_LOCK (src);
+ gst_poll_set_flushing (src->fdset, FALSE);
+ GST_OBJECT_UNLOCK (src);
+
+ return TRUE;
+}
+
+static void
+gst_fd_src_set_property (GObject * object, guint prop_id, const GValue * value,
+ GParamSpec * pspec)
+{
+ GstFdSrc *src = GST_FD_SRC (object);
switch (prop_id) {
- case ARG_LOCATION:
- /* the element must not be playing in order to do this */
- g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
-
- /* if we get a NULL, consider it to be a fd of 0 */
- if (g_value_get_string (value) == NULL) {
- gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
- src->fd = 0;
- /* otherwise set the new filename */
+ case PROP_FD:
+ src->new_fd = g_value_get_int (value);
+
+ /* If state is ready or below, update the current fd immediately
+ * so it is reflected in get_properties and uri */
+ 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, -1);
} else {
- if (sscanf (g_value_get_string (value), "%d", &fd))
- src->fd = fd;
+ GST_DEBUG_OBJECT (src, "state above ready, not updating to new fd yet");
}
+ GST_OBJECT_UNLOCK (object);
break;
- case ARG_BYTESPERREAD:
- src->bytes_per_read = g_value_get_int (value);
+ 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;
}
}
-static void
-gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+static void
+gst_fd_src_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
{
- GstFdSrc *src;
-
- /* it's not null if we got it, but it might not be ours */
- g_return_if_fail (GST_IS_FDSRC (object));
-
- src = GST_FDSRC (object);
+ GstFdSrc *src = GST_FD_SRC (object);
switch (prop_id) {
- case ARG_BYTESPERREAD:
- g_value_set_int (value, src->bytes_per_read);
+ case PROP_FD:
+ g_value_set_int (value, src->fd);
break;
- case ARG_OFFSET:
- g_value_set_int (value, src->curoffset);
+ case PROP_TIMEOUT:
+ g_value_set_uint64 (value, src->timeout);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
-static GstBuffer *
-gst_fdsrc_get(GstPad *pad)
+static GstFlowReturn
+gst_fd_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
{
GstFdSrc *src;
GstBuffer *buf;
- glong readbytes;
+ 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 {
+ try_again = FALSE;
+
+ GST_LOG_OBJECT (src, "doing poll, timeout %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (src->timeout));
- g_return_val_if_fail (pad != NULL, NULL);
- src = GST_FDSRC(gst_pad_get_parent (pad));
+ 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 */
- /* FIXME: should eventually use a bufferpool for this*/
- buf = gst_buffer_new ();
- g_return_val_if_fail (buf, NULL);
+ buf = gst_buffer_new_and_alloc (blocksize);
+ if (G_UNLIKELY (buf == NULL))
+ goto alloc_failed;
- /* allocate the space for the buffer data */
- GST_BUFFER_DATA(buf) = g_malloc(src->bytes_per_read);
- g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, NULL);
+ data = gst_buffer_map (buf, NULL, &maxsize, GST_MAP_WRITE);
- /* read it in from the file */
- readbytes = read(src->fd,GST_BUFFER_DATA(buf),src->bytes_per_read);
- /* if nothing was read, we're in eos */
- if (readbytes == 0) {
- gst_element_set_eos (GST_ELEMENT (src));
- return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
- }
+ do {
+ 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_OFFSET(buf) = src->curoffset;
- GST_BUFFER_SIZE(buf) = readbytes;
+ gst_buffer_unmap (buf, data, readbytes);
+
+ if (readbytes == 0)
+ goto eos;
+
+ GST_BUFFER_OFFSET (buf) = src->curoffset;
+ GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
src->curoffset += readbytes;
+ GST_LOG_OBJECT (psrc, "Read buffer of size %" G_GSSIZE_FORMAT, readbytes);
+
/* we're done, return the buffer */
- return buf;
+ *outbuf = buf;
+
+ return GST_FLOW_OK;
+
+ /* ERRORS */
+#ifndef HAVE_WIN32
+poll_error:
+ {
+ GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
+ ("poll on file descriptor: %s.", g_strerror (errno)));
+ GST_DEBUG_OBJECT (psrc, "Error during poll");
+ return GST_FLOW_ERROR;
+ }
+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_buffer_unref (buf);
+ return GST_FLOW_UNEXPECTED;
+ }
+read_error:
+ {
+ 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;
+ }
+}
+
+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;
+}
+
+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. */
+ return FALSE;
+ }
+
+ if (fstat (src->fd, &stat_results) < 0)
+ goto could_not_stat;
+
+ *size = stat_results.st_size;
+
+ return TRUE;
+
+ /* ERROR */
+could_not_stat:
+ {
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_fd_src_do_seek (GstBaseSrc * bsrc, GstSegment * segment)
+{
+ gint res;
+ gint64 offset;
+ GstFdSrc *src = GST_FD_SRC (bsrc);
+
+ offset = segment->start;
+
+ /* No need to seek to the current position */
+ if (offset == src->curoffset)
+ return TRUE;
+
+ res = lseek (src->fd, offset, SEEK_SET);
+ if (G_UNLIKELY (res < 0 || res != offset))
+ goto seek_failed;
+
+ segment->position = segment->start;
+ segment->time = segment->start;
+
+ return TRUE;
+
+seek_failed:
+ GST_DEBUG_OBJECT (src, "lseek returned %" G_GINT64_FORMAT, offset);
+ return FALSE;
+}
+
+/*** GSTURIHANDLER INTERFACE *************************************************/
+
+static GstURIType
+gst_fd_src_uri_get_type (void)
+{
+ return GST_URI_SRC;
+}
+
+static gchar **
+gst_fd_src_uri_get_protocols (void)
+{
+ static gchar *protocols[] = { (char *) "fd", NULL };
+
+ return protocols;
+}
+
+static const gchar *
+gst_fd_src_uri_get_uri (GstURIHandler * handler)
+{
+ GstFdSrc *src = GST_FD_SRC (handler);
+
+ return src->uri;
+}
+
+static gboolean
+gst_fd_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)
+{
+ 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) {
+ g_free (protocol);
+ return FALSE;
+ }
+ g_free (protocol);
+
+ 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, size);
+ }
+ GST_OBJECT_UNLOCK (src);
+
+ return TRUE;
+}
+
+static void
+gst_fd_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
+{
+ GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
+
+ iface->get_type = gst_fd_src_uri_get_type;
+ iface->get_protocols = gst_fd_src_uri_get_protocols;
+ iface->get_uri = gst_fd_src_uri_get_uri;
+ iface->set_uri = gst_fd_src_uri_set_uri;
}
projects / platform / upstream / gstreamer.git / blobdiff