mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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453f2fee05
Original commit message from CVS: Removed the old eos and qos functions. Removed the functions from the elements.
220 lines
5.9 KiB
C
220 lines
5.9 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstfdsrc.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <gstfdsrc.h>
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GstElementDetails gst_fdsrc_details = {
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"Disk Source",
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"Source/File",
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"Synchronous read from a file",
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VERSION,
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"Erik Walthinsen <omega@cse.ogi.edu>",
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"(C) 1999",
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};
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/* FdSrc signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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ARG_LOCATION,
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ARG_BYTESPERREAD,
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ARG_OFFSET,
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};
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static void gst_fdsrc_class_init (GstFdSrcClass *klass);
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static void gst_fdsrc_init (GstFdSrc *fdsrc);
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static void gst_fdsrc_set_property (GObject *object, guint prop_id,
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const GValue *value, GParamSpec *pspec);
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static void gst_fdsrc_get_property (GObject *object, guint prop_id,
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GValue *value, GParamSpec *pspec);
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static GstBuffer * gst_fdsrc_get (GstPad *pad);
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static GstElementClass *parent_class = NULL;
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//static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_fdsrc_get_type (void)
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{
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static GType fdsrc_type = 0;
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if (!fdsrc_type) {
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static const GTypeInfo fdsrc_info = {
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sizeof(GstFdSrcClass), NULL,
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NULL,
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(GClassInitFunc)gst_fdsrc_class_init,
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NULL,
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NULL,
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sizeof(GstFdSrc),
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0,
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(GInstanceInitFunc)gst_fdsrc_init,
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};
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fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
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}
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return fdsrc_type;
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}
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static void
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gst_fdsrc_class_init (GstFdSrcClass *klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass*)klass;
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parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LOCATION,
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g_param_spec_string("location","location","location",
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"",G_PARAM_WRITABLE)); // CHECKME!
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BYTESPERREAD,
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g_param_spec_int("bytesperread","bytesperread","bytesperread",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_OFFSET,
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g_param_spec_int("offset","offset","offset",
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G_MININT,G_MAXINT,0,G_PARAM_READABLE)); // CHECKME
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gobject_class->set_property = gst_fdsrc_set_property;
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gobject_class->get_property = gst_fdsrc_get_property;
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}
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static void gst_fdsrc_init(GstFdSrc *fdsrc) {
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fdsrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
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gst_pad_set_get_function(fdsrc->srcpad,gst_fdsrc_get);
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gst_element_add_pad(GST_ELEMENT(fdsrc),fdsrc->srcpad);
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fdsrc->fd = 0;
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fdsrc->curoffset = 0;
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fdsrc->bytes_per_read = 4096;
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fdsrc->seq = 0;
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}
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static void
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gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstFdSrc *src;
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int fd;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_FDSRC (object));
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src = GST_FDSRC (object);
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switch (prop_id) {
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case ARG_LOCATION:
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/* the element must not be playing in order to do this */
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g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
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/* if we get a NULL, consider it to be a fd of 0 */
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if (g_value_get_string (value) == NULL) {
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gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
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src->fd = 0;
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/* otherwise set the new filename */
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} else {
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if (sscanf (g_value_get_string (value), "%d", &fd))
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src->fd = fd;
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}
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break;
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case ARG_BYTESPERREAD:
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src->bytes_per_read = g_value_get_int (value);
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break;
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default:
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break;
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}
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}
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static void
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gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstFdSrc *src;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_FDSRC (object));
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src = GST_FDSRC (object);
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switch (prop_id) {
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case ARG_BYTESPERREAD:
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g_value_set_int (value, src->bytes_per_read);
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break;
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case ARG_OFFSET:
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g_value_set_int (value, src->curoffset);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstBuffer *
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gst_fdsrc_get(GstPad *pad)
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{
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GstFdSrc *src;
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GstBuffer *buf;
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glong readbytes;
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g_return_val_if_fail (pad != NULL, NULL);
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src = GST_FDSRC(gst_pad_get_parent (pad));
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/* create the buffer */
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// FIXME: should eventually use a bufferpool for this
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buf = gst_buffer_new ();
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g_return_val_if_fail (buf, NULL);
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/* allocate the space for the buffer data */
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GST_BUFFER_DATA(buf) = g_malloc(src->bytes_per_read);
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g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, NULL);
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/* read it in from the file */
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readbytes = read(src->fd,GST_BUFFER_DATA(buf),src->bytes_per_read);
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if (readbytes == 0) {
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return NULL;
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}
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/* if we didn't get as many bytes as we asked for, we're at EOF */
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if (readbytes < src->bytes_per_read) {
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// set the buffer's EOF bit here
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_EOS);
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}
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GST_BUFFER_OFFSET(buf) = src->curoffset;
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GST_BUFFER_SIZE(buf) = readbytes;
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src->curoffset += readbytes;
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/* we're done, return the buffer */
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return buf;
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}
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