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adding structure setters matching the templates for audio

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Original commit message from CVS:
adding structure setters matching the templates for audio
This commit is contained in:
Thomas Vander Stichele 2004-01-12 19:35:54 +00:00
parent 61763a83f0
commit 5c63b06853
3 changed files with 98 additions and 0 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2004-01-12 Thomas Vander Stichele <thomas at apestaart dot org>
* gst-libs/gst/audio/audio.c: (_gst_audio_structure_set_list),
(gst_audio_structure_set_int):
* gst-libs/gst/audio/audio.h:
add helper functions for _getcaps matching the standard audio
templates
2004-01-12 David Schleef <ds@schleef.org>
* gst/audioconvert/gstaudioconvert.c: (gst_audio_convert_link):

77
gst-libs/gst/audio/audio.c
View file

@ -23,6 +23,8 @@
#include "audio.h"
#include <gst/gststructure.h>
int
gst_audio_frame_byte_size (GstPad* pad)
{
@ -185,6 +187,81 @@ gst_audio_is_buffer_framed (GstPad* pad, GstBuffer* buf)
return FALSE;
}
/* _getcaps helper functions
* sets structure fields to default for audio type
* flag determines which structure fields to set to default
* keep these functions in sync with the templates in audio.h
*/
/* private helper function
* sets a list on the structure
* pass in structure, fieldname for the list, type of the list values,
* number of list values, and each of the values, terminating with NULL
*/
static void
_gst_audio_structure_set_list (GstStructure *structure, const gchar *fieldname,
GType type, int number, ...)
{
va_list varargs;
GValue value = { 0 };
GArray *array;
int j;
g_return_if_fail (structure != NULL);
g_value_init (&value, GST_TYPE_LIST);
array = g_value_peek_pointer (&value);
va_start (varargs, number);
for (j = 0; j < number; ++j)
{
int i;
gboolean b;
GValue list_value = { 0 };
switch (type)
{
case G_TYPE_INT:
i = va_arg (varargs, int);
g_value_init (&list_value, G_TYPE_INT);
g_value_set_int (&list_value, i);
break;
case G_TYPE_BOOLEAN:
b = va_arg (varargs, gboolean);
g_value_init (&list_value, G_TYPE_BOOLEAN);
g_value_set_boolean (&list_value, b);
break;
default:
g_warning ("_gst_audio_structure_set_list: LIST of given type not implemented.");
}
g_array_append_val (array, list_value);
}
gst_structure_set_value (structure, fieldname, &value);
va_end (varargs);
}
void
gst_audio_structure_set_int (GstStructure *structure, GstAudioFieldFlag flag)
{
if (flag & GST_AUDIO_FIELD_RATE)
gst_structure_set (structure, "rate", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
if (flag & GST_AUDIO_FIELD_CHANNELS)
gst_structure_set (structure, "channels", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
if (flag & GST_AUDIO_FIELD_ENDIANNESS)
_gst_audio_structure_set_list (structure, "endianness", G_TYPE_INT, 2, G_LITTLE_ENDIAN, G_BIG_ENDIAN, NULL);
if (flag & GST_AUDIO_FIELD_WIDTH)
_gst_audio_structure_set_list (structure, "width", G_TYPE_INT, 3, 8, 16, 32, NULL);
if (flag & GST_AUDIO_FIELD_DEPTH)
gst_structure_set (structure, "depth", GST_TYPE_INT_RANGE, 1, 32, NULL);
if (flag & GST_AUDIO_FIELD_SIGNED)
_gst_audio_structure_set_list (structure, "signed", G_TYPE_BOOLEAN, 2, TRUE, FALSE, NULL);
if (flag & GST_AUDIO_FIELD_BUFFER_FRAMES)
gst_structure_set (structure, "buffer-frames", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
}
static gboolean
plugin_init (GstPlugin *plugin)
{

13
gst-libs/gst/audio/audio.h
View file

@ -111,5 +111,18 @@ 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);
/* functions useful for _getcaps functions */
typedef enum {
GST_AUDIO_FIELD_RATE = (1 << 0),
GST_AUDIO_FIELD_CHANNELS = (1 << 1),
GST_AUDIO_FIELD_ENDIANNESS = (1 << 2),
GST_AUDIO_FIELD_WIDTH = (1 << 3),
GST_AUDIO_FIELD_DEPTH = (1 << 4),
GST_AUDIO_FIELD_SIGNED = (1 << 5),
GST_AUDIO_FIELD_BUFFER_FRAMES = (1 << 6)
} GstAudioFieldFlag;
void gst_audio_structure_set_int (GstStructure *structure, GstAudioFieldFlag flag);
G_END_DECLS