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theora: get sink caps info from downstream element pad

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=651564
This commit is contained in:
Luis de Bethencourt 2011-06-02 17:29:53 +02:00 committed by Sebastian Dröge
parent a9a85bbac1
commit ddfc8357a8
1 changed files with 51 additions and 13 deletions
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64
ext/theora/gsttheoraenc.c
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@ -243,6 +243,8 @@ GST_STATIC_PAD_TEMPLATE ("src",
GST_STATIC_CAPS ("video/x-theora")
);
static GstCaps *theora_enc_src_caps;
static void
_do_init (GType object_type)
{
@ -275,6 +277,8 @@ static void theora_enc_finalize (GObject * object);
static gboolean theora_enc_write_multipass_cache (GstTheoraEnc * enc,
gboolean begin, gboolean eos);
static char *theora_enc_get_supported_formats (void);
static void
gst_theora_enc_base_init (gpointer g_class)
{
@ -295,6 +299,7 @@ gst_theora_enc_class_init (GstTheoraEncClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
char *caps_string;
/* query runtime encoder properties */
th_enc_ctx *th_ctx;
@ -414,6 +419,14 @@ gst_theora_enc_class_init (GstTheoraEncClass * klass)
THEORA_DEF_MULTIPASS_MODE,
(GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
caps_string = g_strdup_printf ("video/x-raw-yuv, "
"format = (fourcc) { %s }, "
"framerate = (fraction) [1/MAX, MAX], "
"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]",
theora_enc_get_supported_formats ());
theora_enc_src_caps = gst_caps_from_string (caps_string);
g_free (caps_string);
gstelement_class->change_state = theora_enc_change_state;
}
@ -598,24 +611,49 @@ theora_enc_get_supported_formats (void)
static GstCaps *
theora_enc_sink_getcaps (GstPad * pad)
{
GstTheoraEnc *encoder;
GstPad *peer;
GstCaps *caps;
char *supported_formats, *caps_string;
supported_formats = theora_enc_get_supported_formats ();
if (!supported_formats) {
GST_WARNING ("no supported formats found. Encoder disabled?");
/* If we already have caps return them */
if (GST_PAD_CAPS (pad))
return gst_caps_ref (GST_PAD_CAPS (pad));
encoder = GST_THEORA_ENC (gst_pad_get_parent (pad));
if (!encoder)
return gst_caps_new_empty ();
peer = gst_pad_get_peer (encoder->srcpad);
if (peer) {
const GstCaps *templ_caps;
GstCaps *peer_caps;
GstStructure *s;
guint i, n;
peer_caps = gst_pad_get_caps (peer);
/* Translate peercaps to YUV */
peer_caps = gst_caps_make_writable (peer_caps);
n = gst_caps_get_size (peer_caps);
for (i = 0; i < n; i++) {
s = gst_caps_get_structure (peer_caps, i);
gst_structure_set_name (s, "video/x-raw-yuv");
gst_structure_remove_field (s, "streamheader");
}
templ_caps = gst_pad_get_pad_template_caps (pad);
caps = gst_caps_intersect (peer_caps, templ_caps);
caps = gst_caps_intersect (caps, theora_enc_src_caps);
gst_caps_unref (peer_caps);
gst_object_unref (peer);
peer = NULL;
} else {
caps = gst_caps_ref (theora_enc_src_caps);
}
caps_string = g_strdup_printf ("video/x-raw-yuv, "
"format = (fourcc) { %s }, "
"framerate = (fraction) [1/MAX, MAX], "
"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]",
supported_formats);
caps = gst_caps_from_string (caps_string);
g_free (caps_string);
g_free (supported_formats);
GST_DEBUG ("Supported caps: %" GST_PTR_FORMAT, caps);
gst_object_unref (encoder);
return caps;
}