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author | Steve Baker <steve@stevebaker.org> | 2001-09-18 19:07:17 +0000 |
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committer | Steve Baker <steve@stevebaker.org> | 2001-09-18 19:07:17 +0000 |
commit | 3b3e5ecc5df6ca585f27a50cac582d0c3e4e4b60 (patch) | |
tree | fb85d9504896ba762bd3f841e3c263793784dcbf | |
parent | 99335d4c14fd4a07b09616e948ec20f7b1dff3b8 (diff) | |
download | gstreamer-3b3e5ecc5df6ca585f27a50cac582d0c3e4e4b60.tar.gz |
moved from include/gstaudio.h
Original commit message from CVS:
moved from include/gstaudio.h
-rw-r--r-- | libs/audio/gstaudio.h | 68 |
1 files changed, 66 insertions, 2 deletions
diff --git a/libs/audio/gstaudio.h b/libs/audio/gstaudio.h index 7cced9acf2..09ef3ec796 100644 --- a/libs/audio/gstaudio.h +++ b/libs/audio/gstaudio.h @@ -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); + |