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gst/audioconvert/gstaudioconvert.c: add a fixation function that pretty much does the right thing (fixes #137556)

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Original commit message from CVS:
* gst/audioconvert/gstaudioconvert.c: (gst_audio_convert_link),
(_fixate_caps_to_int), (gst_audio_convert_fixate):
add a fixation function that pretty much does the right thing (fixes
#137556)
This commit is contained in:
Benjamin Otte 2004-03-21 02:54:37 +00:00
parent 7330a69cdd
commit 87ffc58ab9
2 changed files with 84 additions and 2 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
2004-03-21 Benjamin Otte <otte@gnome.org>
* gst/audioconvert/gstaudioconvert.c: (gst_audio_convert_link),
(_fixate_caps_to_int), (gst_audio_convert_fixate):
add a fixation function that pretty much does the right thing (fixes
#137556)
2004-03-20 David I. Lehn <dlehn@users.sourceforge.net>
* configure.ac: GST_PACKAGE default: s/GStreamer/GStreamer Plugins/

79
gst/audioconvert/gstaudioconvert.c
View file

@ -109,6 +109,7 @@ static void gst_audio_convert_init (GstAudioConvert * audio_convert);
static void gst_audio_convert_chain (GstPad * pad, GstData * _data);
static GstPadLinkReturn gst_audio_convert_link (GstPad * pad,
const GstCaps * caps);
static GstCaps *gst_audio_convert_fixate (GstPad * pad, const GstCaps * caps);
static GstCaps *gst_audio_convert_getcaps (GstPad * pad);
static GstElementStateReturn gst_audio_convert_change_state (GstElement *
element);
@ -202,6 +203,7 @@ gst_audio_convert_init (GstAudioConvert * this)
(&gst_audio_convert_sink_template), "sink");
gst_pad_set_getcaps_function (this->sink, gst_audio_convert_getcaps);
gst_pad_set_link_function (this->sink, gst_audio_convert_link);
gst_pad_set_fixate_function (this->sink, gst_audio_convert_fixate);
gst_element_add_pad (GST_ELEMENT (this), this->sink);
/* srcpad */
@ -210,6 +212,7 @@ gst_audio_convert_init (GstAudioConvert * this)
(&gst_audio_convert_src_template), "src");
gst_pad_set_getcaps_function (this->src, gst_audio_convert_getcaps);
gst_pad_set_link_function (this->src, gst_audio_convert_link);
gst_pad_set_fixate_function (this->src, gst_audio_convert_fixate);
gst_element_add_pad (GST_ELEMENT (this), this->src);
gst_pad_set_chain_function (this->sink, gst_audio_convert_chain);
@ -386,6 +389,12 @@ gst_audio_convert_link (GstPad * pad, const GstCaps * caps)
}
}
}
if (this->sink == pad) {
this->sinkcaps = ac_caps;
} else {
this->srccaps = ac_caps;
}
GST_LOG_OBJECT (this, "trying to set caps to %" GST_PTR_FORMAT, othercaps);
ret = gst_pad_try_set_caps_nonfixed (otherpad, othercaps);
gst_caps_free (othercaps);
if (ret < GST_PAD_LINK_OK)
@ -406,11 +415,77 @@ gst_audio_convert_link (GstPad * pad, const GstCaps * caps)
this->sinkcaps = other_ac_caps;
}
GST_DEBUG ("negotiated pad to %" GST_PTR_FORMAT, caps);
GST_DEBUG ("negotiated otherpad to %" GST_PTR_FORMAT, othercaps);
GST_DEBUG_OBJECT (this, "negotiated pad to %" GST_PTR_FORMAT, caps);
GST_DEBUG_OBJECT (this, "negotiated otherpad to %" GST_PTR_FORMAT, othercaps);
return GST_PAD_LINK_OK;
}
gboolean
_fixate_caps_to_int (GstCaps ** caps, const gchar * field, gint value)
{
GstCaps *try, *intersection;
gboolean ret = FALSE;
guint i;
try =
gst_caps_new_simple ("audio/x-raw-int", field, GST_TYPE_INT_RANGE,
G_MININT, value - 1, NULL), gst_caps_append (try,
gst_caps_new_simple ("audio/x-raw-float", field, GST_TYPE_INT_RANGE,
G_MININT, value - 1, NULL));
intersection = gst_caps_intersect (*caps, try);
if (!gst_caps_is_empty (intersection)) {
gst_caps_free (try);
try =
gst_caps_new_simple ("audio/x-raw-int", field, GST_TYPE_INT_RANGE,
value, G_MAXINT, NULL), gst_caps_append (try,
gst_caps_new_simple ("audio/x-raw-float", field, GST_TYPE_INT_RANGE,
value, G_MAXINT, NULL));
gst_caps_free (intersection);
intersection = gst_caps_intersect (*caps, try);
if (!gst_caps_is_empty (intersection)) {
gst_caps_free (*caps);
*caps = intersection;
ret = TRUE;
} else {
gst_caps_free (intersection);
}
}
for (i = 0; i < gst_caps_get_size (*caps); i++) {
GstStructure *structure = gst_caps_get_structure (*caps, i);
if (gst_structure_has_field (structure, field))
ret |=
gst_caps_structure_fixate_field_nearest_int (structure, field, value);
}
return ret;
}
static GstCaps *
gst_audio_convert_fixate (GstPad * pad, const GstCaps * caps)
{
GstAudioConvert *this =
GST_AUDIO_CONVERT (gst_object_get_parent (GST_OBJECT (pad)));
GstPad *otherpad = (pad == this->sink ? this->src : this->sink);
GstAudioConvertCaps ac_caps =
(pad == this->sink ? this->srccaps : this->sinkcaps);
GstCaps *copy;
/* only fixate when we're proxying, so we don't fixate to some crap the other side doesn't want */
if (!GST_PAD_IS_NEGOTIATING (otherpad))
return NULL;
copy = gst_caps_copy (caps);
if (_fixate_caps_to_int (&copy, "channels", ac_caps.channels))
return copy;
if (_fixate_caps_to_int (&copy, "width", ac_caps.is_int ? ac_caps.width : 16))
return copy;
if (_fixate_caps_to_int (&copy, "depth", ac_caps.is_int ? ac_caps.depth : 16))
return copy;
gst_caps_free (copy);
return NULL;
}
static GstElementStateReturn
gst_audio_convert_change_state (GstElement * element)
{