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kateenc: error out if category has not been set and check for obviously wrong values

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This commit is contained in:
Tim-Philipp Müller 2009-08-11 12:42:28 +01:00
parent a6912096cd
commit 20a4c32a0b
2 changed files with 65 additions and 3 deletions
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62
ext/kate/gstkateenc.c
View file

@ -62,14 +62,18 @@
* <para>
* This encodes a DVD SPU track to a Kate stream:
* <programlisting>
* gst-launch dvdreadsrc ! dvddemux ! dvdsubparse ! kateenc ! oggmux ! filesink location=test.ogg
* gst-launch dvdreadsrc ! dvddemux ! dvdsubparse ! kateenc category=spu-subtitles ! oggmux ! filesink location=test.ogg
* </programlisting>
* </para>
* </refsect2>
*/
/* FIXME: should we automatically pick up the language code from the
* upstream event tags if none was set via the property? */
/* FIXME:
* - should we automatically pick up the language code from the
* upstream event tags if none was set via the property?
* - turn category property into an enum (freestyle text property in
* combination with supposedly strictly defined known values that
* aren't even particularly human-readable is just not very nice)? */
#ifdef HAVE_CONFIG_H
#include "config.h"
@ -131,6 +135,7 @@ static void gst_kate_enc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_kate_enc_dispose (GObject * object);
static gboolean gst_kate_enc_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_kate_enc_chain (GstPad * pad, GstBuffer * buf);
static GstStateChangeReturn gst_kate_enc_change_state (GstElement * element,
GstStateChange transition);
@ -246,6 +251,8 @@ gst_kate_enc_init (GstKateEnc * ke, GstKateEncClass * gclass)
GST_DEBUG_FUNCPTR (gst_kate_enc_chain));
gst_pad_set_event_function (ke->sinkpad,
GST_DEBUG_FUNCPTR (gst_kate_enc_sink_event));
gst_pad_set_setcaps_function (ke->sinkpad,
GST_DEBUG_FUNCPTR (gst_kate_enc_setcaps));
gst_element_add_pad (GST_ELEMENT (ke), ke->sinkpad);
ke->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
@ -514,6 +521,47 @@ gst_kate_enc_set_metadata (GstKateEnc * ke)
}
}
static gboolean
gst_kate_enc_setcaps (GstPad * pad, GstCaps * caps)
{
GstKateEnc *ke;
ke = GST_KATE_ENC (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (ke, "input caps: %" GST_PTR_FORMAT, caps);
/* One day we could try to automatically set the category based on the
* input format, assuming that the input is subtitles. Currently that
* doesn't work yet though, because we send the header packets already from
* the sink event handler when receiving the newsegment event, so before
* the first buffer (might be tricky to change too, given that there could
* be no data at the beginning for a long time). So for now we just try to
* make sure people didn't set the category to something obviously wrong. */
if (ke->category != NULL) {
GstStructure *s = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (s, "text/plain") ||
gst_structure_has_name (s, "text/x-pango-markup")) {
if (strcmp (ke->category, "K-SPU") == 0 ||
strcmp (ke->category, "spu-subtitles") == 0) {
GST_ELEMENT_WARNING (ke, LIBRARY, SETTINGS, (NULL),
("Category set to '%s', but input is text-based.", ke->category));
}
} else if (gst_structure_has_name (s, "video/x-dvd-subpicture")) {
if (strcmp (ke->category, "SUB") == 0 ||
strcmp (ke->category, "subtitles") == 0) {
GST_ELEMENT_WARNING (ke, LIBRARY, SETTINGS, (NULL),
("Category set to '%s', but input is subpictures.", ke->category));
}
} else {
GST_ERROR_OBJECT (ke, "unexpected input caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_kate_enc_is_simple_subtitle_category (GstKateEnc * ke, const char *category)
{
@ -541,6 +589,14 @@ gst_kate_enc_send_headers (GstKateEnc * ke)
GstCaps *caps;
GList *headers = NULL, *item;
if (G_UNLIKELY (ke->category == NULL || *ke->category == '\0')) {
/* The error code is a bit of a lie, but seems most appropriate. */
GST_ELEMENT_ERROR (ke, LIBRARY, SETTINGS, (NULL),
("The 'category' property must be set. For subtitles, set it to "
"either 'SUB' (text subtitles) or 'K-SPU' (dvd-style subtitles)"));
return GST_FLOW_ERROR;
}
gst_kate_enc_set_metadata (ke);
/* encode headers and store them in a list */

6
tests/check/elements/kate.c
View file

@ -447,6 +447,8 @@ GST_START_TEST (test_kate_encode_simple)
GstCaps *caps;
kateenc = setup_kateenc ();
g_object_set (kateenc, "category", "subtitles", NULL);
fail_unless (gst_element_set_state (kateenc,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");
@ -498,6 +500,8 @@ GST_START_TEST (test_kate_encode_spu)
GstCaps *caps;
kateenc = setup_kateenc ();
g_object_set (kateenc, "category", "spu-subtitles", NULL);
fail_unless (gst_element_set_state (kateenc,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");
@ -560,6 +564,8 @@ GST_START_TEST (test_kate_encode_keepalives)
for (round = 0; round < 3; ++round) {
kateenc = setup_kateenc ();
/* doesn't matter here, since we never send a packet */
g_object_set (kateenc, "category", "subtitles", NULL);
fail_unless (gst_element_set_state (kateenc,
GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
"could not set to playing");