+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
#include "gstaudio.h"
+int
+gst_audio_frame_byte_size (GstPad* pad)
+{
+/* calculate byte size of an audio frame
+ * this should be moved closer to the gstreamer core
+ * and be implemented for every mime type IMO
+ * returns 0 if there's an error, or the byte size if everything's ok
+ */
+
+ int width = 0;
+ int channels = 0;
+
+ GstCaps *caps = NULL;
+
+ /* get caps of pad */
+ caps = GST_PAD_CAPS (pad);
+
+ if (caps == NULL)
+ /* ERROR: could not get caps of pad */
+ return 0;
+
+ width = gst_caps_get_int (caps, "width");
+ channels = gst_caps_get_int (caps, "channels");
+ return (width / 8) * channels;
+}
+
+long
+gst_audio_frame_length (GstPad* pad, GstBuffer* buf)
+/* calculate length of buffer in frames
+ * this should be moved closer to the gstreamer core
+ * and be implemented for every mime type IMO
+ * returns 0 if there's an error, or the number of frames if everything's ok
+ */
+{
+ int frame_byte_size = 0;
+
+ frame_byte_size = gst_audio_frame_byte_size (pad);
+ if (frame_byte_size == 0)
+ /* error */
+ return 0;
+ /* FIXME: this function assumes the buffer size to be a whole multiple
+ * of the frame byte size
+ */
+ return GST_BUFFER_SIZE (buf) / frame_byte_size;
+}
+
+long
+gst_audio_frame_rate (GstPad *pad)
+/*
+ * calculate frame rate (based on caps of pad)
+ * returns 0 if failed, rate if success
+ */
+{
+ GstCaps *caps = NULL;
+
+ /* get caps of pad */
+ caps = GST_PAD_CAPS (pad);
+
+ if (caps == NULL)
+ /* ERROR: could not get caps of pad */
+ return 0;
+ else
+ return gst_caps_get_int (caps, "rate");
+}
+
double
gst_audio_length (GstPad* pad, GstBuffer* buf)
{
#include <gst/gst.h>
-/* calculate length in seconds of audio buffer buf based on caps of pad */
+/* get byte size of audio frame (based on caps of pad */
+int gst_audio_frame_byte_size (GstPad* pad);
+
+/* get length in frames of buffer */
+long gst_audio_frame_length (GstPad* pad, GstBuffer* buf);
-double gst_audio_length (GstPad* pad, GstBuffer* buf);
+/* get frame rate based on caps */
+long gst_audio_frame_rate (GstPad *pad);
+
+/* calculate length in seconds of audio buffer buf based on caps of pad */
+double gst_audio_length (GstPad* pad, GstBuffer* buf);