+++ /dev/null
-/* 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)
-{
-/* calculate length in seconds
- * of audio buffer buf
- * based on capabilities of pad
- */
-
- long bytes = 0;
- int width = 0;
- int channels = 0;
- long rate = 0L;
-
- double length;
-
- GstCaps *caps = NULL;
-
- /* get caps of pad */
- caps = GST_PAD_CAPS (pad);
- if (caps == NULL)
- {
- /* ERROR: could not get caps of pad */
- length = 0.0;
- }
- else
- {
- bytes = GST_BUFFER_SIZE (buf);
- width = gst_caps_get_int (caps, "width");
- channels = gst_caps_get_int (caps, "channels");
- rate = gst_caps_get_int (caps, "rate");
-
- length = (bytes * 8.0) / (double) (rate * channels * width);
- }
- return length;
-}
-
-long
-gst_audio_highest_sample_value (GstPad* pad)
-/* calculate highest possible sample value
- * based on capabilities of pad
- */
-{
- gboolean is_signed = FALSE;
- gint width = 0;
- GstCaps *caps = NULL;
-
- caps = GST_PAD_CAPS (pad);
- // FIXME : Please change this to a better warning method !
- if (caps == NULL)
- printf ("WARNING: gstaudio: could not get caps of pad !\n");
- width = gst_caps_get_int (caps, "width");
- is_signed = gst_caps_get_boolean (caps, "signed");
- if (is_signed) --width;
- /* example : 16 bit, signed : samples between -32768 and 32767 */
- return ((long) (1 << width));
-}
-
-gboolean
-gst_audio_is_buffer_framed (GstPad* pad, GstBuffer* buf)
-/* check if the buffer size is a whole multiple of the frame size */
-{
- if (GST_BUFFER_SIZE (buf) % gst_audio_frame_byte_size (pad) == 0)
- return TRUE;
- else
- return FALSE;
-}
+++ /dev/null
-/* Gnome-Streamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- * Library <2001> Thomas Vander Stichele <thomas@apestaart.org>
- *
- * 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 <gst/gst.h>
-
-/* for people that are looking at this source: the purpose of these defines is
- * to make GstCaps a bit easier, in that you don't have to know all of the
- * properties that need to be defined. you can just use these macros. currently
- * (8/01) the only plugins that use these are the passthrough, speed, volume,
- * and [de]interleave plugins. so. these are for convenience only, and do not
- * specify the 'limits' of gstreamer. you might also use these definitions as a
- * base for making your own caps, if need be.
- *
- * for example, to make a source pad that can output mono streams of either
- * float or int:
-
- template = gst_padtemplate_new
- ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
- gst_caps_append(gst_caps_new ("sink_int", "audio/raw",
- GST_AUDIO_INT_PAD_TEMPLATE_PROPS),
- gst_caps_new ("sink_float", "audio/raw",
- GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS)),
- NULL);
-
- srcpad = gst_pad_new_from_template(template,"src");
-
- * Andy Wingo, 18 August 2001 */
-
-#define GST_AUDIO_INT_PAD_TEMPLATE_PROPS \
- gst_props_new (\
- "format", GST_PROPS_STRING ("int"),\
- "law", GST_PROPS_INT (0),\
- "endianness", GST_PROPS_INT (G_BYTE_ORDER),\
- "signed", GST_PROPS_LIST (\
- GST_PROPS_BOOLEAN (TRUE),\
- GST_PROPS_BOOLEAN(FALSE)\
- ),\
- "width", GST_PROPS_LIST (GST_PROPS_INT(8), GST_PROPS_INT(16)),\
- "depth", GST_PROPS_LIST (GST_PROPS_INT(8), GST_PROPS_INT(16)),\
- "rate", GST_PROPS_INT_RANGE (4000, 96000),\
- "channels", GST_PROPS_INT_RANGE (1, G_MAXINT),\
- NULL)
-
-#define GST_AUDIO_INT_MONO_PAD_TEMPLATE_PROPS \
- gst_props_new (\
- "format", GST_PROPS_STRING ("int"),\
- "law", GST_PROPS_INT (0),\
- "endianness", GST_PROPS_INT (G_BYTE_ORDER),\
- "signed", GST_PROPS_LIST (\
- GST_PROPS_BOOLEAN (TRUE),\
- GST_PROPS_BOOLEAN(FALSE)\
- ),\
- "width", GST_PROPS_LIST (GST_PROPS_INT(8), GST_PROPS_INT(16)),\
- "depth", GST_PROPS_LIST (GST_PROPS_INT(8), GST_PROPS_INT(16)),\
- "rate", GST_PROPS_INT_RANGE (4000, 96000),\
- "channels", GST_PROPS_INT (1),\
- NULL)
-
-#define GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS \
- gst_props_new (\
- "format", GST_PROPS_STRING ("float"),\
- "layout", GST_PROPS_STRING ("gfloat"),\
- "intercept", GST_PROPS_FLOAT (0.0),\
- "slope", GST_PROPS_FLOAT (1.0),\
- "rate", GST_PROPS_INT_RANGE (4000, 96000),\
- "channels", GST_PROPS_INT (1),\
- NULL)
-
-/*
- * this library defines and implements some helper functions for audio
- * handling
- */
-
-/* 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);
-
-/* 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);
-
-/* calculate highest possible sample value based on capabilities of pad */
-long gst_audio_highest_sample_value (GstPad* pad);
-
-/* check if the buffer size is a whole multiple of the frame size */
-gboolean gst_audio_is_buffer_framed (GstPad* pad, GstBuffer* buf);
-
-
projects / platform / upstream / gstreamer.git / commitdiff