mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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2377b5d86d
Original commit message from CVS: Added a plain copy of the bytstream code found in a52dec. it doesn't compile/work yet.
115 lines
2.6 KiB
C
115 lines
2.6 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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* gstbytestreams.c: Utility functions: gtk_get_property stuff, etc.
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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 <stdio.h>
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#include <string.h>
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#include "gstbytestreams.h"
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/**
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* gst_bytestream_new:
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* @pad: the pad to attach the bytstream to
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*
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* creates a bytestream from the given pad
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*
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* Returns: a new #GstByteStream object
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*/
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GstByteStream*
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gst_bytestream_new (GstPad *pad)
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{
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GstByteStream *bs = g_new(GstByteStream, 1);
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bs->pad = pad;
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bs->data = NULL;
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bs->size = 0;
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bs->index = 0;
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return bs;
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}
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void
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gst_bytestream_destroy (GstByteStream *bs)
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{
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if (bs->data) {
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g_free(bs->data);
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}
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g_free(bs);
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}
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static void
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gst_bytestream_bytes_fill (GstByteStream *bs, guint64 len)
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{
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size_t oldlen;
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GstBuffer *buf;
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while ((bs->index + len) > bs->size) {
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buf = gst_pad_pull(bs->pad);
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oldlen = bs->size - bs->index;
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memmove(bs->data, bs->data + bs->index, oldlen);
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bs->size = oldlen + GST_BUFFER_SIZE(buf);
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bs->index = 0;
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bs->data = realloc(bs->data, bs->size);
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if (!bs->data) {
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fprintf(stderr, "realloc failed: d:%p s:%d\n", bs->data, bs->size);
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}
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memcpy(bs->data + oldlen, GST_BUFFER_DATA(buf), GST_BUFFER_SIZE(buf));
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}
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g_assert ((bs->index + len) <= bs->size);
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}
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guint8*
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gst_bytestream_bytes_peek (GstByteStream *bs, guint64 len)
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{
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g_return_val_if_fail (len > 0, NULL);
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gst_bytestream_bytes_fill (bs, len);
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return gst_bytestream_pos (bs);
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}
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guint8*
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gst_bytestream_bytes_read (GstByteStream *bs, guint64 len)
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{
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guint8 *ptr;
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g_return_val_if_fail (len > 0, NULL);
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gst_bytestream_bytes_fill(bs, len);
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ptr = gst_bytestream_pos(bs);
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bs->index += len;
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return ptr;
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}
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gboolean
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gst_bytestream_bytes_seek (GstByteStream *bs, guint64 offset)
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{
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return FALSE;
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}
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void
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gst_bytestream_bytes_flush (GstByteStream *bs, guint64 len)
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{
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gst_bytestream_bytes_read(bs, len);
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}
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