gstreamer/gst/elements/gstfilesink.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstfilesink.c:
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/gst.h>
#include <errno.h>
#include "gstfilesink.h"
#include <string.h>
GST_DEBUG_CATEGORY (gst_filesink_debug);
#define GST_CAT_DEFAULT gst_filesink_debug
GstElementDetails gst_filesink_details = {
"File Sink",
"Sink/File",
"LGPL",
"Write stream to a file",
VERSION,
"Thomas <thomas@apestaart.org>",
"(C) 2001"
};
/* FileSink signals and args */
enum {
/* FILL ME */
SIGNAL_HANDOFF,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOCATION
};
GST_PAD_EVENT_MASK_FUNCTION (gst_filesink_get_event_mask,
{ GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
GST_SEEK_METHOD_SET |
GST_SEEK_METHOD_END |
GST_SEEK_FLAG_FLUSH },
{ GST_EVENT_FLUSH, 0 },
{ GST_EVENT_DISCONTINUOUS, 0 }
)
GST_PAD_QUERY_TYPE_FUNCTION (gst_filesink_get_query_types,
GST_QUERY_TOTAL,
GST_QUERY_POSITION
)
GST_PAD_FORMATS_FUNCTION (gst_filesink_get_formats,
GST_FORMAT_BYTES
)
static void gst_filesink_class_init (GstFileSinkClass *klass);
static void gst_filesink_init (GstFileSink *filesink);
static void gst_filesink_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_filesink_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static gboolean gst_filesink_open_file (GstFileSink *sink);
static void gst_filesink_close_file (GstFileSink *sink);
static gboolean gst_filesink_handle_event (GstPad *pad, GstEvent *event);
static gboolean gst_filesink_pad_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
static void gst_filesink_chain (GstPad *pad,GstBuffer *buf);
static GstElementStateReturn gst_filesink_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
static guint gst_filesink_signals[LAST_SIGNAL] = { 0 };
GType
gst_filesink_get_type (void)
{
static GType filesink_type = 0;
if (!filesink_type) {
static const GTypeInfo filesink_info = {
sizeof(GstFileSinkClass), NULL,
NULL,
(GClassInitFunc)gst_filesink_class_init,
NULL,
NULL,
sizeof(GstFileSink),
0,
(GInstanceInitFunc)gst_filesink_init,
};
filesink_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSink", &filesink_info, 0);
}
return filesink_type;
}
static void
gst_filesink_class_init (GstFileSinkClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
g_param_spec_string ("location", "File Location", "Location of the file to write",
NULL, G_PARAM_READWRITE));
gst_filesink_signals[SIGNAL_HANDOFF] =
g_signal_new ("handoff", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstFileSinkClass, handoff), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gobject_class->set_property = gst_filesink_set_property;
gobject_class->get_property = gst_filesink_get_property;
gstelement_class->change_state = gst_filesink_change_state;
}
static void
gst_filesink_init (GstFileSink *filesink)
{
GstPad *pad;
pad = gst_pad_new ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (filesink), pad);
gst_pad_set_chain_function (pad, gst_filesink_chain);
GST_FLAG_SET (GST_ELEMENT(filesink), GST_ELEMENT_EVENT_AWARE);
gst_pad_set_event_function(pad, gst_filesink_handle_event);
gst_pad_set_event_mask_function(pad, gst_filesink_get_event_mask);
gst_pad_set_query_function (pad, gst_filesink_pad_query);
gst_pad_set_query_type_function (pad, gst_filesink_get_query_types);
gst_pad_set_formats_function (pad, gst_filesink_get_formats);
filesink->filename = NULL;
filesink->file = NULL;
}
static void
gst_filesink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstFileSink *sink;
/* it's not null if we got it, but it might not be ours */
sink = GST_FILESINK (object);
switch (prop_id) {
case ARG_LOCATION:
/* the element must be stopped or paused in order to do this */
g_return_if_fail (GST_STATE (sink) <= GST_STATE_PAUSED);
if (GST_STATE (sink) == GST_STATE_PAUSED)
g_return_if_fail (!GST_FLAG_IS_SET (sink, GST_FILESINK_OPEN));
if (sink->filename)
g_free (sink->filename);
sink->filename = g_strdup (g_value_get_string (value));
if (GST_STATE (sink) == GST_STATE_PAUSED)
gst_filesink_open_file (sink);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_filesink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstFileSink *sink;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FILESINK (object));
sink = GST_FILESINK (object);
switch (prop_id) {
case ARG_LOCATION:
g_value_set_string (value, sink->filename);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_filesink_open_file (GstFileSink *sink)
{
g_return_val_if_fail (!GST_FLAG_IS_SET (sink, GST_FILESINK_OPEN), FALSE);
/* open the file */
if (!sink->filename)
{
/* Out of files */
return FALSE;
}
sink->file = fopen (sink->filename, "w");
if (sink->file == NULL) {
gst_element_error (GST_ELEMENT (sink),
"Error opening file %s: %s",
sink->filename, g_strerror(errno));
return FALSE;
}
GST_FLAG_SET (sink, GST_FILESINK_OPEN);
sink->data_written = 0;
return TRUE;
}
static void
gst_filesink_close_file (GstFileSink *sink)
{
g_return_if_fail (GST_FLAG_IS_SET (sink, GST_FILESINK_OPEN));
if (fclose (sink->file) != 0)
{
gst_element_error (GST_ELEMENT (sink),
"Error closing file %s: %s",
sink->filename, g_strerror(errno));
}
else {
GST_FLAG_UNSET (sink, GST_FILESINK_OPEN);
}
}
static gboolean
gst_filesink_pad_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value)
{
GstFileSink *sink = GST_FILESINK (GST_PAD_PARENT (pad));
switch (type) {
case GST_QUERY_TOTAL:
switch (*format) {
case GST_FORMAT_BYTES:
if (GST_FLAG_IS_SET (GST_ELEMENT(sink), GST_FILESINK_OPEN)) {
*value = sink->data_written; /* FIXME - doesn't the kernel provide
such a function? */
break;
}
default:
return FALSE;
}
break;
case GST_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_BYTES:
if (GST_FLAG_IS_SET (GST_ELEMENT(sink), GST_FILESINK_OPEN)) {
*value = ftell (sink->file);
break;
}
default:
return FALSE;
}
break;
default:
return FALSE;
}
return TRUE;
}
/* handle events (search) */
static gboolean
gst_filesink_handle_event (GstPad *pad, GstEvent *event)
{
GstEventType type;
GstFileSink *filesink;
filesink = GST_FILESINK (gst_pad_get_parent (pad));
g_return_val_if_fail (GST_FLAG_IS_SET (filesink, GST_FILESINK_OPEN),
FALSE);
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_SEEK:
g_return_val_if_fail (GST_EVENT_SEEK_FORMAT (event) == GST_FORMAT_BYTES,
FALSE);
if (GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH)
if (fflush (filesink->file))
gst_element_error (GST_ELEMENT (filesink),
"Error flushing file %s: %s",
filesink->filename, g_strerror(errno));
switch (GST_EVENT_SEEK_METHOD(event))
{
case GST_SEEK_METHOD_SET:
fseek (filesink->file, GST_EVENT_SEEK_OFFSET (event), SEEK_SET);
break;
case GST_SEEK_METHOD_CUR:
fseek (filesink->file, GST_EVENT_SEEK_OFFSET (event), SEEK_CUR);
break;
case GST_SEEK_METHOD_END:
fseek (filesink->file, GST_EVENT_SEEK_OFFSET (event), SEEK_END);
break;
default:
g_warning("unkown seek method!\n");
break;
}
break;
case GST_EVENT_DISCONTINUOUS:
{
gint64 offset;
if (gst_event_discont_get_value (event, GST_FORMAT_BYTES, &offset))
fseek (filesink->file, offset, SEEK_SET);
gst_event_unref (event);
break;
}
case GST_EVENT_FLUSH:
if (fflush (filesink->file)) {
gst_element_error (GST_ELEMENT (filesink),
"Error flushing file %s: %s",
filesink->filename, g_strerror(errno));
}
break;
case GST_EVENT_EOS:
gst_filesink_close_file (filesink);
gst_element_set_eos (GST_ELEMENT (filesink));
break;
default:
gst_pad_event_default (pad, event);
break;
}
return TRUE;
}
/**
* gst_filesink_chain:
* @pad: the pad this filesink is connected to
* @buf: the buffer that has to be absorbed
*
* take the buffer from the pad and write to file if it's open
*/
static void
gst_filesink_chain (GstPad *pad, GstBuffer *buf)
{
GstFileSink *filesink;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
filesink = GST_FILESINK (gst_pad_get_parent (pad));
if (GST_IS_EVENT(buf))
{
gst_filesink_handle_event(pad, GST_EVENT(buf));
return;
}
if (GST_FLAG_IS_SET (filesink, GST_FILESINK_OPEN))
{
guint bytes_written = 0, back_pending = 0;
if (ftell(filesink->file) < filesink->data_written)
back_pending = filesink->data_written - ftell(filesink->file);
do {
size_t wrote = fwrite (GST_BUFFER_DATA (buf) + bytes_written, 1,
GST_BUFFER_SIZE (buf) - bytes_written,
filesink->file);
if (wrote <= 0) {
gst_element_error (GST_ELEMENT (filesink),
"Only %d of %d bytes written: %s",
bytes_written, GST_BUFFER_SIZE (buf),
strerror (errno));
break;
}
bytes_written += wrote;
} while (bytes_written < GST_BUFFER_SIZE (buf));
filesink->data_written += bytes_written - back_pending;
}
gst_buffer_unref (buf);
g_signal_emit (G_OBJECT (filesink),
gst_filesink_signals[SIGNAL_HANDOFF], 0,
filesink);
}
static GstElementStateReturn
gst_filesink_change_state (GstElement *element)
{
g_return_val_if_fail (GST_IS_FILESINK (element), GST_STATE_FAILURE);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
if (GST_FLAG_IS_SET (element, GST_FILESINK_OPEN))
gst_filesink_close_file (GST_FILESINK (element));
break;
case GST_STATE_READY_TO_PAUSED:
if (!GST_FLAG_IS_SET (element, GST_FILESINK_OPEN)) {
if (!gst_filesink_open_file (GST_FILESINK (element)))
return GST_STATE_FAILURE;
}
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}