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theora: Check supported input formats in getcaps function

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We want to fail early when an older libtheora release is used that does
not support Y444 or Y42B formats, so use a getcaps function that does
this.
This commit is contained in:
Benjamin Otte 2009-09-07 17:29:38 +02:00 committed by Sebastian Dröge
parent aa46e56170
commit d9c9852764
1 changed files with 69 additions and 0 deletions
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69
ext/theora/theoraenc.c
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@ -202,6 +202,7 @@ static gboolean theora_enc_src_event (GstPad * pad, GstEvent * event);
static GstFlowReturn theora_enc_chain (GstPad * pad, GstBuffer * buffer);
static GstStateChangeReturn theora_enc_change_state (GstElement * element,
GstStateChange transition);
static GstCaps *theora_enc_sink_getcaps (GstPad * pad);
static gboolean theora_enc_sink_setcaps (GstPad * pad, GstCaps * caps);
static void theora_enc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
@ -302,6 +303,7 @@ gst_theora_enc_init (GstTheoraEnc * enc, GstTheoraEncClass * g_class)
gst_pad_new_from_static_template (&theora_enc_sink_factory, "sink");
gst_pad_set_chain_function (enc->sinkpad, theora_enc_chain);
gst_pad_set_event_function (enc->sinkpad, theora_enc_sink_event);
gst_pad_set_getcaps_function (enc->sinkpad, theora_enc_sink_getcaps);
gst_pad_set_setcaps_function (enc->sinkpad, theora_enc_sink_setcaps);
gst_element_add_pad (GST_ELEMENT (enc), enc->sinkpad);
@ -376,6 +378,73 @@ theora_enc_clear (GstTheoraEnc * enc)
enc->expected_ts = GST_CLOCK_TIME_NONE;
}
static char *
theora_enc_get_supported_formats (void)
{
theora_state state;
theora_info info;
struct
{
theora_pixelformat pixelformat;
char *fourcc;
} formats[] = {
{
OC_PF_420, "I420"}, {
OC_PF_422, "Y42B"}, {
OC_PF_444, "Y444"}
};
GString *string = NULL;
guint i;
theora_info_init (&info);
info.width = 16;
info.height = 16;
info.fps_numerator = 25;
info.fps_denominator = 1;
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
info.pixelformat = formats[i].pixelformat;
if (theora_encode_init (&state, &info) != 0)
continue;
GST_LOG ("format %s is supported", formats[i].fourcc);
theora_clear (&state);
if (string == NULL) {
string = g_string_new (formats[i].fourcc);
} else {
g_string_append (string, ", ");
g_string_append (string, formats[i].fourcc);
}
}
theora_info_clear (&info);
return string == NULL ? NULL : g_string_free (string, FALSE);
}
static GstCaps *
theora_enc_sink_getcaps (GstPad * pad)
{
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?");
return gst_caps_new_empty ();
}
caps_string = g_strdup_printf ("video/x-raw-yuv, "
"format = (fourcc) { %s }, "
"framerate = (fraction) [0/1, MAX], "
"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]",
supported_formats);
caps = gst_caps_from_string (caps_string);
g_free (caps_string);
return caps;
}
static gboolean
theora_enc_sink_setcaps (GstPad * pad, GstCaps * caps)
{