mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 11:11:08 +00:00
6340b23cc0
Original commit message from CVS: Brought standard elements in line with new state management system.
209 lines
5.6 KiB
C
209 lines
5.6 KiB
C
/* Gnome-Streamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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_arg(GtkObject *object,GtkArg *arg,guint id);
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static void gst_fdsrc_get_arg(GtkObject *object,GtkArg *arg,guint id);
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static void gst_fdsrc_push(GstSrc *src);
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//static void gst_fdsrc_push_region(GstSrc *src,gulong offset,gulong size);
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static GstSrcClass *parent_class = NULL;
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//static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };
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GtkType
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gst_fdsrc_get_type(void) {
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static GtkType fdsrc_type = 0;
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if (!fdsrc_type) {
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static const GtkTypeInfo fdsrc_info = {
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"GstFdSrc",
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sizeof(GstFdSrc),
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sizeof(GstFdSrcClass),
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(GtkClassInitFunc)gst_fdsrc_class_init,
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(GtkObjectInitFunc)gst_fdsrc_init,
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(GtkArgSetFunc)gst_fdsrc_set_arg,
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(GtkArgGetFunc)gst_fdsrc_get_arg,
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(GtkClassInitFunc)NULL,
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};
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fdsrc_type = gtk_type_unique(GST_TYPE_SRC,&fdsrc_info);
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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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GtkObjectClass *gtkobject_class;
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GstSrcClass *gstsrc_class;
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gtkobject_class = (GtkObjectClass*)klass;
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gstsrc_class = (GstSrcClass*)klass;
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parent_class = gtk_type_class(GST_TYPE_SRC);
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gtk_object_add_arg_type("GstFdSrc::location", GTK_TYPE_STRING,
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GTK_ARG_WRITABLE, ARG_LOCATION);
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gtk_object_add_arg_type("GstFdSrc::bytesperread", GTK_TYPE_INT,
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GTK_ARG_READWRITE, ARG_BYTESPERREAD);
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gtk_object_add_arg_type("GstFdSrc::offset", GTK_TYPE_INT,
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GTK_ARG_READABLE, ARG_OFFSET);
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gtkobject_class->set_arg = gst_fdsrc_set_arg;
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gtkobject_class->get_arg = gst_fdsrc_get_arg;
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gstsrc_class->push = gst_fdsrc_push;
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/* we nominally can't (won't) do async */
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gstsrc_class->push_region = NULL;
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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_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 gst_fdsrc_set_arg(GtkObject *object,GtkArg *arg,guint id) {
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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(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 (GTK_VALUE_STRING(*arg) == 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(GTK_VALUE_STRING(*arg),"%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 = GTK_VALUE_INT(*arg);
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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 gst_fdsrc_get_arg(GtkObject *object,GtkArg *arg,guint id) {
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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 (id) {
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case ARG_BYTESPERREAD:
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GTK_VALUE_INT(*arg) = src->bytes_per_read;
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break;
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case ARG_OFFSET:
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GTK_VALUE_INT(*arg) = src->curoffset;
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break;
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default:
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arg->type = GTK_TYPE_INVALID;
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break;
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}
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}
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void gst_fdsrc_push(GstSrc *src) {
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GstFdSrc *fdsrc;
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GstBuffer *buf;
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glong readbytes;
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g_return_if_fail(src != NULL);
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g_return_if_fail(GST_IS_FDSRC(src));
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fdsrc = GST_FDSRC(src);
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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_if_fail(buf);
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/* allocate the space for the buffer data */
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GST_BUFFER_DATA(buf) = g_malloc(fdsrc->bytes_per_read);
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g_return_if_fail(GST_BUFFER_DATA(buf) != NULL);
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/* read it in from the file */
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readbytes = read(fdsrc->fd,GST_BUFFER_DATA(buf),fdsrc->bytes_per_read);
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if (readbytes == 0) {
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gst_src_signal_eos(GST_SRC(fdsrc));
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return;
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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 < fdsrc->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) = fdsrc->curoffset;
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GST_BUFFER_SIZE(buf) = readbytes;
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fdsrc->curoffset += readbytes;
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/* we're done, push the buffer off now */
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gst_pad_push(fdsrc->srcpad,buf);
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}
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