gstreamer/ext/gio/gstgiosrc.c
Sebastian Dröge 68a1d6cfd5 ext/gio/: Some minor cleanup and allow setting the location only when the element is not playing or paused.
Original commit message from CVS:
* ext/gio/gstgiosink.c: (gst_gio_sink_base_init),
(gst_gio_sink_set_property), (gst_gio_sink_render):
* ext/gio/gstgiosrc.c: (gst_gio_src_base_init),
(gst_gio_src_set_property):
Some minor cleanup and allow setting the location only when the
element is not playing or paused.
2007-09-29 07:01:55 +00:00

394 lines
10 KiB
C

/* GStreamer
*
* Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-giosrc
*
* <refsect2>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch giosrc location=file:///home/foo/bar.ext ! fakesink
* </programlisting>
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstgiosrc.h"
GST_DEBUG_CATEGORY_STATIC (gst_gio_src_debug);
#define GST_CAT_DEFAULT gst_gio_src_debug
enum
{
ARG_0,
ARG_LOCATION
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_BOILERPLATE_FULL (GstGioSrc, gst_gio_src, GstBaseSrc, GST_TYPE_BASE_SRC,
gst_gio_uri_handler_do_init);
static void gst_gio_src_finalize (GObject * object);
static void gst_gio_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gio_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_gio_src_start (GstBaseSrc * base_src);
static gboolean gst_gio_src_stop (GstBaseSrc * base_src);
static gboolean gst_gio_src_get_size (GstBaseSrc * base_src, guint64 * size);
static gboolean gst_gio_src_is_seekable (GstBaseSrc * base_src);
static gboolean gst_gio_src_unlock (GstBaseSrc * base_src);
static gboolean gst_gio_src_unlock_stop (GstBaseSrc * base_src);
static gboolean gst_gio_src_check_get_range (GstBaseSrc * base_src);
static GstFlowReturn gst_gio_src_create (GstBaseSrc * base_src, guint64 offset,
guint size, GstBuffer ** buf);
static void
gst_gio_src_base_init (gpointer gclass)
{
static GstElementDetails element_details = {
"GIO source",
"Source/File",
"Read from any GIO-supported location",
"Ren\xc3\xa9 Stadler <mail@renestadler.de>"
};
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
GST_DEBUG_CATEGORY_INIT (gst_gio_src_debug, "giosrc", 0, "GIO source");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_set_details (element_class, &element_details);
}
static void
gst_gio_src_class_init (GstGioSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSrcClass *gstbasesrc_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gobject_class->finalize = gst_gio_src_finalize;
gobject_class->set_property = gst_gio_src_set_property;
gobject_class->get_property = gst_gio_src_get_property;
g_object_class_install_property (gobject_class, ARG_LOCATION,
g_param_spec_string ("location", "Location", "URI location to read from",
NULL, G_PARAM_READWRITE));
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_gio_src_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_gio_src_stop);
gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_gio_src_get_size);
gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_gio_src_is_seekable);
gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_gio_src_unlock);
gstbasesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_gio_src_unlock_stop);
gstbasesrc_class->check_get_range =
GST_DEBUG_FUNCPTR (gst_gio_src_check_get_range);
gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_gio_src_create);
}
static void
gst_gio_src_init (GstGioSrc * src, GstGioSrcClass * gclass)
{
src->cancel = g_cancellable_new ();
}
static void
gst_gio_src_finalize (GObject * object)
{
GstGioSrc *src = GST_GIO_SRC (object);
g_object_unref (src->cancel);
if (src->file)
g_object_unref (src->file);
g_free (src->location);
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
}
static void
gst_gio_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGioSrc *src = GST_GIO_SRC (object);
switch (prop_id) {
case ARG_LOCATION:
if (GST_STATE (src) == GST_STATE_PLAYING ||
GST_STATE (src) == GST_STATE_PAUSED)
break;
g_free (src->location);
src->location = g_strdup (g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gio_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGioSrc *src = GST_GIO_SRC (object);
switch (prop_id) {
case ARG_LOCATION:
g_value_set_string (value, src->location);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gio_src_start (GstBaseSrc * base_src)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
GError *err = NULL;
if (src->location == NULL) {
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), ("No location given"));
return FALSE;
}
src->file = g_file_new_for_uri (src->location);
if (src->file == NULL) {
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("Malformed URI or protocol not supported (%s)", src->location));
return FALSE;
}
src->stream = g_file_read (src->file, src->cancel, &err);
if (src->stream == NULL && !gst_gio_error (src, "g_file_read", &err, NULL)) {
if (GST_GIO_ERROR_MATCHES (err, NOT_FOUND))
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
("Could not open location %s for reading: %s",
src->location, err->message));
else
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("Could not open location %s for reading: %s",
src->location, err->message));
g_clear_error (&err);
g_object_unref (src->file);
src->file = NULL;
return FALSE;
} else if (src->stream == NULL) {
g_object_unref (src->file);
return FALSE;
}
src->position = 0;
GST_DEBUG_OBJECT (src, "opened location %s", src->location);
return TRUE;
}
static gboolean
gst_gio_src_stop (GstBaseSrc * base_src)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
gboolean success = TRUE;
GError *err = NULL;
if (src->stream != NULL) {
/* FIXME: In case that the call below would block, there is no one to
* trigger the cancellation! */
success = g_input_stream_close (G_INPUT_STREAM (src->stream), src->cancel,
&err);
if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) {
GST_ELEMENT_ERROR (src, RESOURCE, CLOSE, (NULL),
("g_input_stream_close failed: %s", err->message));
g_clear_error (&err);
}
g_object_unref (src->stream);
src->stream = NULL;
}
if (src->file != NULL) {
g_object_unref (src->file);
src->file = NULL;
}
GST_DEBUG_OBJECT (src, "closed location %s", src->location);
return success;
}
static gboolean
gst_gio_src_get_size (GstBaseSrc * base_src, guint64 * size)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
GFileInfo *info;
GError *err = NULL;
info = g_file_input_stream_query_info (src->stream,
G_FILE_ATTRIBUTE_STD_SIZE, src->cancel, &err);
if (info != NULL) {
*size = g_file_info_get_size (info);
g_object_unref (info);
GST_DEBUG_OBJECT (src, "found size: %" G_GUINT64_FORMAT, *size);
return TRUE;
}
if (!gst_gio_error (src, "g_file_input_stream_query_info", &err, NULL)) {
if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
GST_DEBUG_OBJECT (src, "size information not available");
else
GST_WARNING_OBJECT (src, "size information retrieval failed: %s",
err->message);
g_clear_error (&err);
}
return FALSE;
}
static gboolean
gst_gio_src_is_seekable (GstBaseSrc * base_src)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
gboolean seekable;
seekable = g_seekable_can_seek (G_SEEKABLE (src->stream));
GST_DEBUG_OBJECT (src, "can seek: %d", seekable);
return seekable;
}
static gboolean
gst_gio_src_unlock (GstBaseSrc * base_src)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
GST_LOG_OBJECT (src, "triggering cancellation");
g_cancellable_cancel (src->cancel);
return TRUE;
}
static gboolean
gst_gio_src_unlock_stop (GstBaseSrc * base_src)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
GST_LOG_OBJECT (src, "restoring cancellable");
g_object_unref (src->cancel);
src->cancel = g_cancellable_new ();
return TRUE;
}
static gboolean
gst_gio_src_check_get_range (GstBaseSrc * base_src)
{
/* FIXME: Implement dry-run variant using guesswork like gnomevfssrc? */
return GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_SRC_CLASS,
check_get_range, (base_src), FALSE);
}
static GstFlowReturn
gst_gio_src_create (GstBaseSrc * base_src, guint64 offset, guint size,
GstBuffer ** buf_return)
{
GstGioSrc *src = GST_GIO_SRC (base_src);
GstBuffer *buf;
gssize read;
gboolean success, eos;
GstFlowReturn ret = GST_FLOW_OK;
GError *err = NULL;
if (G_UNLIKELY (offset != src->position)) {
ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel);
if (ret == GST_FLOW_OK)
src->position = offset;
else
return ret;
}
buf = gst_buffer_new_and_alloc (size);
GST_LOG_OBJECT (src, "reading %u bytes from offset %" G_GUINT64_FORMAT,
size, offset);
read =
g_input_stream_read (G_INPUT_STREAM (src->stream), GST_BUFFER_DATA (buf),
size, src->cancel, &err);
success = (read >= 0);
eos = (size > 0 && read == 0);
if (!success && !gst_gio_error (src, "g_input_stream_read", &err, &ret)) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not read from location %s: %s", src->location, err->message));
g_clear_error (&err);
}
if (success && !eos) {
src->position += read;
GST_BUFFER_OFFSET (buf) = offset;
GST_BUFFER_SIZE (buf) = read;
*buf_return = buf;
} else {
/* !success || eos */
gst_buffer_unref (buf);
}
if (eos)
ret = GST_FLOW_UNEXPECTED;
return ret;
}