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authorDavid I. Lehn <dlehn@users.sourceforge.net>2002-12-19 21:34:56 +0000
committerDavid I. Lehn <dlehn@users.sourceforge.net>2002-12-19 21:34:56 +0000
commit61898506c8fe0bf85170ab290bf3aecb2c0a81b0 (patch)
treea35814d30baa44a104addadcd9ec14c3eb4fd749 /gst/vbidec/gstvbidec.c
parent08d0c89de597cd1cd287bd34fea49453a3f24aa9 (diff)
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initial checkin of work-in-progress vbidec plugin for closed caption support
Original commit message from CVS: initial checkin of work-in-progress vbidec plugin for closed caption support
Diffstat (limited to 'gst/vbidec/gstvbidec.c')
-rw-r--r--gst/vbidec/gstvbidec.c372
1 files changed, 372 insertions, 0 deletions
diff --git a/gst/vbidec/gstvbidec.c b/gst/vbidec/gstvbidec.c
new file mode 100644
index 00000000..1da10543
--- /dev/null
+++ b/gst/vbidec/gstvbidec.c
@@ -0,0 +1,372 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+#include <string.h>
+#include <inttypes.h>
+#include <ctype.h>
+#include <gst/gst.h>
+#include "gstvbidec.h"
+#include "vbidata.h"
+#include "vbiscreen.h"
+
+#define GST_TYPE_VBIDEC \
+ (gst_vbidec_get_type())
+#define GST_VBIDEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VBIDEC,GstVBIDec))
+#define GST_VBIDEC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VBIDEC,GstVBIDec))
+#define GST_IS_VBIDEC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VBIDEC))
+#define GST_IS_VBIDEC_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VBIDEC))
+
+//typedef struct _GstVBIDec GstVBIDec;
+typedef struct _GstVBIDecClass GstVBIDecClass;
+
+struct _GstVBIDec {
+ GstElement element;
+
+ /* pads */
+ GstPad *sinkpad,
+ *srcpad;
+ char caption[128];
+ vbiscreen_t *vbiscreen;
+ vbidata_t *vbidata;
+ int caption_type;
+ gboolean dvd_input;
+};
+
+struct _GstVBIDecClass {
+ GstElementClass parent_class;
+};
+
+GType gst_vbidec_get_type(void);
+
+/* elementfactory information */
+static GstElementDetails gst_vbidec_details = {
+ "VBI decoder",
+ "Codec/Video/Decoder",
+ "GPL",
+ "Decodes closed captions and XDS data from VBI data",
+ VERSION,
+ "David I. Lehn <dlehn@users.sourceforge.net>",
+ "(C) 2002"
+};
+
+/* VBIDec signals and args */
+enum {
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ ARG_CAPTION_TYPE,
+ ARG_DVD_INPUT
+};
+
+GST_PAD_TEMPLATE_FACTORY (sink_template_factory,
+ "sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_CAPS_NEW (
+ "vbidec_sink",
+ "application/octet-stream",
+ NULL
+ )
+);
+
+GST_PAD_TEMPLATE_FACTORY (src_template_factory,
+ "src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_CAPS_NEW (
+ "vbidec_src",
+ "text/plain",
+ NULL
+ )
+);
+
+
+#define GST_TYPE_VBIDEC_CAPTION_TYPE_TYPE (gst_vbidec_caption_type_get_type())
+static GType
+gst_vbidec_caption_type_get_type (void)
+{
+ static GType vbidec_caption_type_type = 0;
+ static GEnumValue vbidec_caption_type[] = {
+ { CAPTURE_OFF, "0", "Closed Captions off"},
+ { CAPTURE_CC1, "1", "Closed Caption CC1"},
+ { CAPTURE_CC2, "2", "Closed Caption CC2"},
+ { CAPTURE_CC3, "4", "Closed Caption CC3"},
+ { CAPTURE_CC4, "5", "Closed Caption CC4"},
+ { CAPTURE_T1, "6", "Closed Caption T1"},
+ { CAPTURE_T2, "7", "Closed Caption T2"},
+ { CAPTURE_T3, "8", "Closed Caption T3"},
+ { CAPTURE_T4, "9", "Closed Caption T4"},
+ {0, NULL, NULL},
+ };
+ if (!vbidec_caption_type_type) {
+ vbidec_caption_type_type = g_enum_register_static ("GstVBIDecCaptionTypeType", vbidec_caption_type);
+ }
+ return vbidec_caption_type_type;
+}
+
+static void gst_vbidec_class_init (GstVBIDecClass *klass);
+static void gst_vbidec_init (GstVBIDec *vbidec);
+
+static void gst_vbidec_set_property (GObject *object, guint prop_id,
+ const GValue *value, GParamSpec *pspec);
+static void gst_vbidec_get_property (GObject *object, guint prop_id,
+ GValue *value, GParamSpec *pspec);
+
+static void gst_vbidec_chain (GstPad *pad, GstBuffer *buffer);
+
+static GstElementClass *parent_class = NULL;
+/*static guint gst_vbidec_signals[LAST_SIGNAL] = { 0 };*/
+
+GType
+gst_vbidec_get_type (void)
+{
+ static GType vbidec_type = 0;
+
+ if (!vbidec_type) {
+ static const GTypeInfo vbidec_info = {
+ sizeof(GstVBIDecClass),
+ NULL,
+ NULL,
+ (GClassInitFunc)gst_vbidec_class_init,
+ NULL,
+ NULL,
+ sizeof(GstVBIDec),
+ 0,
+ (GInstanceInitFunc)gst_vbidec_init,
+ };
+ vbidec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVBIDec", &vbidec_info, 0);
+ }
+ return vbidec_type;
+}
+
+static void
+gst_vbidec_class_init(GstVBIDecClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ gobject_class->set_property = gst_vbidec_set_property;
+ gobject_class->get_property = gst_vbidec_get_property;
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CAPTION_TYPE,
+ g_param_spec_enum ("caption type", "caption type", "Closed Caption Type",
+ GST_TYPE_VBIDEC_CAPTION_TYPE_TYPE, CAPTURE_OFF, G_PARAM_READWRITE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DVD_INPUT,
+ g_param_spec_boolean ("dvd input", "dvd input", "VBI is encapsulated in MPEG2 GOP user_data field (as on DVDs)",
+ FALSE, G_PARAM_READWRITE));
+}
+
+static void
+gst_vbidec_init (GstVBIDec *vbidec)
+{
+ /* create the sink and src pads */
+ vbidec->sinkpad = gst_pad_new_from_template (
+ GST_PAD_TEMPLATE_GET (sink_template_factory), "sink");
+ gst_element_add_pad (GST_ELEMENT (vbidec), vbidec->sinkpad);
+ gst_pad_set_chain_function (vbidec->sinkpad, GST_DEBUG_FUNCPTR (gst_vbidec_chain));
+
+ vbidec->srcpad = gst_pad_new_from_template (
+ GST_PAD_TEMPLATE_GET (src_template_factory), "src");
+ gst_element_add_pad (GST_ELEMENT (vbidec), vbidec->srcpad);
+
+ vbidec->vbiscreen = vbiscreen_new(0, 0, 1.0, 0, (void *)vbidec);
+ vbidec->vbidata = vbidata_new_line(vbidec->vbiscreen, 0);
+ vbidec->caption_type = CAPTURE_OFF;
+ vbidata_capture_mode(vbidec->vbidata, vbidec->caption_type);
+ vbidec->dvd_input = FALSE;
+}
+
+static void
+line21_decode(GstVBIDec *vbidec, guint8 *data, guint32 size)
+{
+ vbidata_process_line(vbidec->vbidata, data, 0);
+}
+
+static void
+dvd_user_data_decode(GstVBIDec *vbidec, guint8 *data, guint32 size)
+{
+ //char caption[128];
+ //int ci; /* caption index */
+ int i; /* buf index */
+ int num_disp_field;
+ guint8 b1, b2;
+ int w;
+
+ //g_print("%%%% vbi decode\n");
+ //g_print("== %p %d\n", data, size);
+ i = 0;
+ /* Check for Closed Captioning data */
+ if (data[i] != 0x43 || data[i+1] != 0x43 ||
+ data[i+2] != 0x01 || data[i+3] != 0xf8) {
+ g_print ("non-CC data\n");
+ return;
+ }
+ //g_print ("CC data\n");
+ i += 4; /* above */
+ i += 4; /* ? */
+ num_disp_field = data[i] & 0x3f;
+ //g_print ("ndf %d\n", num_disp_field);
+ while ((data[i] & 0xfe) == 0xfe) {
+ if (data[i] & 0x1) {
+ b1 = data[i+1] & 0x7f;
+ b2 = data[i+2] & 0x7f;
+ w = (b2 << 8) | b1;
+ vbidata_process_16b(vbidec->vbidata, 0, w);
+ }
+ i += 3;
+ }
+}
+
+static void
+gst_vbidec_chain (GstPad *pad, GstBuffer *buf)
+{
+ GstVBIDec *vbidec = GST_VBIDEC (gst_pad_get_parent (pad));
+ guint32 size;
+ guint8 *data;
+ guint64 pts;
+
+ size = GST_BUFFER_SIZE (buf);
+ data = GST_BUFFER_DATA (buf);
+ pts = GST_BUFFER_TIMESTAMP (buf);
+
+ /*
+ g_print("** user_data: addr:%p len:%d state:%d\n", data, size, 0);
+ {
+ int i;
+ guint8 ud;
+ g_print("** \"");
+ for (i=0; i<size; i++) {
+ ud = data[i];
+ if (isprint((char)ud)) {
+ g_print("%c", (char)ud);
+ } else {
+ g_print("[0x%02x]", ud);
+ }
+ }
+ g_print("\"\n");
+ }
+ */
+
+ if (vbidec->dvd_input) {
+ dvd_user_data_decode(vbidec, data, size);
+ } else {
+ line21_decode(vbidec, data, size);
+ }
+
+ gst_buffer_unref(buf);
+}
+
+void
+gst_vbidec_show_text (GstVBIDec *vbidec, char *text, int len)
+{
+ //fprintf(stderr, "%*s\n", len, text);
+ if (len > 0) {
+ if (GST_PAD_IS_USABLE (vbidec->srcpad)) {
+ GstBuffer *buf = gst_buffer_new_and_alloc (len);
+ memcpy (GST_BUFFER_DATA (buf), text, len);
+ GST_BUFFER_SIZE (buf) = len;
+ // FIXME
+ //GST_BUFFER_TIMESTAMP (buf) = vbidec->...
+ //...
+ //fprintf(stderr, "vbi text pushed\n");
+ gst_pad_push (vbidec->srcpad, buf);
+ }
+ }
+}
+
+static void
+gst_vbidec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+ GstVBIDec *vbidec;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_VBIDEC (object));
+ vbidec = GST_VBIDEC (object);
+
+ switch (prop_id) {
+ case ARG_DVD_INPUT:
+ vbidec->dvd_input = g_value_get_boolean(value);
+ break;
+ case ARG_CAPTION_TYPE:
+ vbidec->caption_type = g_value_get_enum(value);
+ vbidata_capture_mode(vbidec->vbidata, vbidec->caption_type);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+gst_vbidec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+ GstVBIDec *vbidec;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_VBIDEC (object));
+ vbidec = GST_VBIDEC (object);
+
+ switch (prop_id) {
+ case ARG_DVD_INPUT:
+ g_value_set_boolean(value, vbidec->dvd_input);
+ break;
+ case ARG_CAPTION_TYPE:
+ g_value_set_enum(value, vbidec->caption_type);
+ break;
+ default:
+ break;
+ }
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ /* create an elementfactory for the vbidec element */
+ factory = gst_element_factory_new("vbidec",GST_TYPE_VBIDEC,
+ &gst_vbidec_details);
+ g_return_val_if_fail(factory != NULL, FALSE);
+ gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_PRIMARY);
+
+ gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_template_factory));
+ gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_template_factory));
+
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "vbidec",
+ plugin_init
+};