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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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381 lines
10 KiB
C
381 lines
10 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <inttypes.h>
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#include <ctype.h>
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#include <gst/gst.h>
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#include "gstvbidec.h"
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#include "vbidata.h"
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#include "vbiscreen.h"
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#define GST_TYPE_VBIDEC \
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(gst_vbidec_get_type())
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#define GST_VBIDEC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VBIDEC,GstVBIDec))
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#define GST_VBIDEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VBIDEC,GstVBIDec))
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#define GST_IS_VBIDEC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VBIDEC))
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#define GST_IS_VBIDEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VBIDEC))
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//typedef struct _GstVBIDec GstVBIDec;
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typedef struct _GstVBIDecClass GstVBIDecClass;
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struct _GstVBIDec
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{
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GstElement element;
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/* pads */
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GstPad *sinkpad, *srcpad;
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char caption[128];
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vbiscreen_t *vbiscreen;
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vbidata_t *vbidata;
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int caption_type;
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gboolean dvd_input;
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};
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struct _GstVBIDecClass
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{
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GstElementClass parent_class;
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};
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GType gst_vbidec_get_type (void);
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/* VBIDec signals and args */
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enum
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{
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_VERBOSE,
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ARG_CAPTION_TYPE,
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ARG_DVD_INPUT
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};
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static GstStaticPadTemplate gst_vbidec_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate gst_vbidec_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("text/plain")
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);
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#define GST_TYPE_VBIDEC_CAPTION_TYPE_TYPE (gst_vbidec_caption_type_get_type())
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static GType
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gst_vbidec_caption_type_get_type (void)
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{
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static GType vbidec_caption_type_type = 0;
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static GEnumValue vbidec_caption_type[] = {
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{CAPTURE_OFF, "0", "Closed Captions off"},
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{CAPTURE_CC1, "1", "Closed Caption CC1"},
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{CAPTURE_CC2, "2", "Closed Caption CC2"},
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{CAPTURE_CC3, "4", "Closed Caption CC3"},
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{CAPTURE_CC4, "5", "Closed Caption CC4"},
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{CAPTURE_T1, "6", "Closed Caption T1"},
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{CAPTURE_T2, "7", "Closed Caption T2"},
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{CAPTURE_T3, "8", "Closed Caption T3"},
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{CAPTURE_T4, "9", "Closed Caption T4"},
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{0, NULL, NULL},
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};
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if (!vbidec_caption_type_type) {
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vbidec_caption_type_type =
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g_enum_register_static ("GstVBIDecCaptionTypeType",
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vbidec_caption_type);
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}
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return vbidec_caption_type_type;
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}
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static void gst_vbidec_base_init (gpointer g_class);
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static void gst_vbidec_class_init (GstVBIDecClass * klass);
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static void gst_vbidec_init (GstVBIDec * vbidec);
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static void gst_vbidec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_vbidec_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_vbidec_chain (GstPad * pad, GstData * _data);
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static GstElementClass *parent_class = NULL;
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/*static guint gst_vbidec_signals[LAST_SIGNAL] = { 0 };*/
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GType
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gst_vbidec_get_type (void)
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{
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static GType vbidec_type = 0;
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if (!vbidec_type) {
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static const GTypeInfo vbidec_info = {
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sizeof (GstVBIDecClass),
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gst_vbidec_base_init,
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NULL,
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(GClassInitFunc) gst_vbidec_class_init,
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NULL,
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NULL,
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sizeof (GstVBIDec),
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0,
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(GInstanceInitFunc) gst_vbidec_init,
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};
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vbidec_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstVBIDec", &vbidec_info, 0);
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}
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return vbidec_type;
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}
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static void
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gst_vbidec_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details_simple (element_class, "VBI decoder",
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"Codec/Decoder/Video",
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"Decodes closed captions and XDS data from VBI data",
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"David I. Lehn <dlehn@users.sourceforge.net>");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_vbidec_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_vbidec_sink_template));
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}
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static void
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gst_vbidec_class_init (GstVBIDecClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_vbidec_set_property;
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gobject_class->get_property = gst_vbidec_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VERBOSE,
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g_param_spec_boolean ("verbose", "verbose", "verbose",
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FALSE, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CAPTION_TYPE,
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g_param_spec_enum ("caption-type", "caption type", "Closed Caption Type",
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GST_TYPE_VBIDEC_CAPTION_TYPE_TYPE, CAPTURE_OFF,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DVD_INPUT,
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g_param_spec_boolean ("dvd-input", "dvd input",
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"VBI is encapsulated in MPEG2 GOP user_data field (as on DVDs)",
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FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_vbidec_init (GstVBIDec * vbidec)
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{
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/* create the sink and src pads */
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vbidec->sinkpad =
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gst_pad_new_from_static_template (&gst_vbidec_sink_template, "sink");
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gst_element_add_pad (GST_ELEMENT (vbidec), vbidec->sinkpad);
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gst_pad_set_chain_function (vbidec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_vbidec_chain));
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vbidec->srcpad =
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gst_pad_new_from_static_template (&gst_vbidec_src_template, "src");
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gst_element_add_pad (GST_ELEMENT (vbidec), vbidec->srcpad);
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vbidec->vbiscreen = vbiscreen_new (0, 0, 1.0, 0, (void *) vbidec);
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vbidec->vbidata = vbidata_new_line (vbidec->vbiscreen, 0);
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vbidec->caption_type = CAPTURE_OFF;
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vbidata_capture_mode (vbidec->vbidata, vbidec->caption_type);
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vbidec->dvd_input = FALSE;
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}
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static void
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line21_decode (GstVBIDec * vbidec, guint8 * data, guint32 size)
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{
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vbidata_process_line (vbidec->vbidata, data, 0);
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}
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static void
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dvd_user_data_decode (GstVBIDec * vbidec, guint8 * data, guint32 size)
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{
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//char caption[128];
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//int ci; /* caption index */
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int i; /* buf index */
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int num_disp_field;
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guint8 b1, b2;
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int w;
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//g_print("%%%% vbi decode\n");
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//g_print("== %p %d\n", data, size);
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i = 0;
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/* Check for Closed Captioning data */
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if (data[i] != 0x43 || data[i + 1] != 0x43 ||
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data[i + 2] != 0x01 || data[i + 3] != 0xf8) {
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g_print ("non-CC data\n");
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return;
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}
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//g_print ("CC data\n");
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i += 4; /* above */
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i += 4; /* ? */
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num_disp_field = data[i] & 0x3f;
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//g_print ("ndf %d\n", num_disp_field);
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while ((data[i] & 0xfe) == 0xfe) {
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if (data[i] & 0x1) {
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b1 = data[i + 1] & 0x7f;
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b2 = data[i + 2] & 0x7f;
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w = (b2 << 8) | b1;
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vbidata_process_16b (vbidec->vbidata, 0, w);
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}
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i += 3;
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}
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}
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static void
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gst_vbidec_chain (GstPad * pad, GstData * _data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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GstVBIDec *vbidec = GST_VBIDEC (gst_pad_get_parent (pad));
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guint32 size;
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guint8 *data;
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guint64 pts;
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size = GST_BUFFER_SIZE (buf);
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data = GST_BUFFER_DATA (buf);
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pts = GST_BUFFER_TIMESTAMP (buf);
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/*
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g_print("** user_data: addr:%p len:%d state:%d\n", data, size, 0);
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{
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int i;
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guint8 ud;
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g_print("** \"");
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for (i=0; i<size; i++) {
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ud = data[i];
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if (isprint((char)ud)) {
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g_print("%c", (char)ud);
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} else {
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g_print("[0x%02x]", ud);
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}
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}
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g_print("\"\n");
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}
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*/
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if (vbidec->dvd_input) {
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dvd_user_data_decode (vbidec, data, size);
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} else {
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line21_decode (vbidec, data, size);
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}
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gst_buffer_unref (buf);
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}
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void
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gst_vbidec_show_text (GstVBIDec * vbidec, char *text, int len)
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{
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//fprintf(stderr, "%*s\n", len, text);
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if (len > 0) {
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if (GST_PAD_IS_USABLE (vbidec->srcpad)) {
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GstBuffer *buf = gst_buffer_new_and_alloc (len);
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memcpy (GST_BUFFER_DATA (buf), text, len);
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GST_BUFFER_SIZE (buf) = len;
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// FIXME
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//GST_BUFFER_TIMESTAMP (buf) = vbidec->...
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//...
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//fprintf(stderr, "vbi text pushed\n");
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gst_pad_push (vbidec->srcpad, GST_DATA (buf));
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}
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}
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}
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static void
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gst_vbidec_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstVBIDec *vbidec;
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g_return_if_fail (GST_IS_VBIDEC (object));
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vbidec = GST_VBIDEC (object);
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switch (prop_id) {
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case ARG_VERBOSE:
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vbidata_set_verbose (vbidec->vbidata, g_value_get_boolean (value));
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vbiscreen_set_verbose (vbidec->vbiscreen, g_value_get_boolean (value));
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break;
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case ARG_DVD_INPUT:
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vbidec->dvd_input = g_value_get_boolean (value);
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break;
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case ARG_CAPTION_TYPE:
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vbidec->caption_type = g_value_get_enum (value);
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vbidata_capture_mode (vbidec->vbidata, vbidec->caption_type);
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break;
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default:
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break;
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}
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}
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static void
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gst_vbidec_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstVBIDec *vbidec;
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g_return_if_fail (GST_IS_VBIDEC (object));
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vbidec = GST_VBIDEC (object);
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switch (prop_id) {
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case ARG_DVD_INPUT:
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g_value_set_boolean (value, vbidec->dvd_input);
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break;
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case ARG_CAPTION_TYPE:
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g_value_set_enum (value, vbidec->caption_type);
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break;
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default:
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break;
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}
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "vbidec", GST_RANK_NONE,
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GST_TYPE_VBIDEC);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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vbidec,
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"Decodes closed captions and XDS data from VBI data",
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plugin_init, VERSION, "GPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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