gstreamer/ext/musepack/gstmusepackreader.c

146 lines
3.4 KiB
C
Raw Normal View History

/* GStreamer Musepack decoder plugin
* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* 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 <string.h>
#include "gstmusepackreader.h"
GstMusepackReader::GstMusepackReader (GstByteStream *bs)
{
this->bs = bs;
this->eos = false;
}
GstMusepackReader::~GstMusepackReader (void)
{
}
mpc_int32_t
GstMusepackReader::read (void * ptr, mpc_int32_t size)
{
guint8 *data;
gint read;
do {
read = gst_bytestream_peek_bytes (this->bs, &data, size);
if (read != size) {
GstEvent *event;
guint32 remaining;
gst_bytestream_get_status (this->bs, &remaining, &event);
if (!event) {
GST_ELEMENT_ERROR (gst_pad_get_parent (this->bs->pad),
RESOURCE, READ, (NULL), (NULL));
goto done;
}
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_INTERRUPT:
gst_event_unref (event);
goto done;
case GST_EVENT_EOS:
this->eos = true;
gst_event_unref (event);
goto done;
default:
gst_pad_event_default (this->bs->pad, event);
break;
}
}
} while (read != size);
done:
if (read != 0) {
memcpy (ptr, data, read);
gst_bytestream_flush_fast (this->bs, read);
}
return read;
}
bool
GstMusepackReader::seek (mpc_int32_t offset)
{
guint8 *dummy;
/* hacky hack - if we're after typefind, we'll fail because
* typefind is still typefinding (heh :) ). So read first. */
if (this->tell () != this->get_size ()) {
guint8 dummy2[1];
this->read (dummy2, 1);
}
if (!gst_bytestream_seek (this->bs, offset, GST_SEEK_METHOD_SET))
return FALSE;
/* get discont */
while (gst_bytestream_peek_bytes (this->bs, &dummy, 1) != 1) {
GstEvent *event;
guint32 remaining;
gst_bytestream_get_status (this->bs, &remaining, &event);
if (!event) {
GST_ELEMENT_ERROR (gst_pad_get_parent (this->bs->pad),
RESOURCE, SEEK, (NULL), (NULL));
return false;
}
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
g_warning ("EOS!");
gst_event_unref (event);
return false;
case GST_EVENT_DISCONTINUOUS:
gst_event_unref (event);
return true;
case GST_EVENT_INTERRUPT:
g_warning ("interrupt!");
return false;
default:
gst_pad_event_default (this->bs->pad, event);
break;
}
}
return false;
}
mpc_int32_t
GstMusepackReader::tell (void)
{
return gst_bytestream_tell (this->bs);
}
mpc_int32_t
GstMusepackReader::get_size (void)
{
return gst_bytestream_length (this->bs);
}
bool
GstMusepackReader::canseek (void)
{
return true;
}