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moved from include/gstaudio.h

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Original commit message from CVS:
moved from include/gstaudio.h
This commit is contained in:
Steve Baker 2001-09-18 19:07:17 +00:00
parent 99335d4c14
commit 3b3e5ecc5d
1 changed files with 66 additions and 2 deletions
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68
libs/audio/gstaudio.h
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@ -18,13 +18,76 @@
* 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
*/
#include <gst/gst.h>
/* get byte size of audio frame (based on caps of pad */
int gst_audio_frame_byte_size (GstPad* pad);
@ -43,3 +106,4 @@ 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);