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ceaccoverlay: New CEA-708 Closed Caption decoder and overlayer
This new element allows decoding and overlaying CEA-708 Closed Caption streams over video. * Supports CDP and cc_data closedcaption/x-cea-708 streams * Uses pango to render CC stream * Support GstVideoOverlayComposition meta if downstream supports is Tested on various test files. Remains to be fixed/improved: * Switch to GstByteReader (for code safety) * Switch to GString (instead of manual pango string construction) * Move pango/rendering code outside of main 708 decoder file (so that actual CC parser/decoder can be (re)used in other scenarios). Initial patches and improvements by: * CableLabs RUIH-RI Team <ruihri@cablelabs.com> * Steve Maynard <steve@secondstryke.com> * cjun.wang" <cjun.wang@samsung.com> https://bugzilla.gnome.org/show_bug.cgi?id=704881
This commit is contained in:
Edward Hervey
Edward Hervey
parent
aab111b979
commit
a41fb3c6df
7 changed files with 4386 additions and 6 deletions
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@ -21,6 +21,10 @@ libgstclosedcaption_la_SOURCES = \
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$(zvbi_headers) \
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gstccextractor.c \
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gstccextractor.h \
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gstcea708decoder.c \
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gstcea708decoder.h \
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gstceaccoverlay.c \
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gstceaccoverlay.h \
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gstline21dec.c \
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gstline21dec.h \
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gstclosedcaption.c
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@ -28,12 +32,14 @@ libgstclosedcaption_la_SOURCES = \
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libgstclosedcaption_la_CFLAGS = \
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$(GST_PLUGINS_BASE_CFLAGS) \
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$(GST_BASE_CFLAGS) \
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$(GST_CFLAGS)
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$(GST_CFLAGS) \
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$(PANGO_CFLAGS)
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libgstclosedcaption_la_LIBADD = \
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$(GST_PLUGINS_BASE_LIBS) -lgstvideo-@GST_API_VERSION@ \
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$(GST_BASE_LIBS) \
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$(GST_LIBS)
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$(GST_LIBS) \
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$(PANGO_LIBS)
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libgstclosedcaption_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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1791
ext/closedcaption/gstcea708decoder.c
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1791
ext/closedcaption/gstcea708decoder.c
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File diff suppressed because it is too large
Load diff
485
ext/closedcaption/gstcea708decoder.h
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485
ext/closedcaption/gstcea708decoder.h
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@ -0,0 +1,485 @@
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/* GStreamer
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* Copyright (C) 2013 CableLabs, Louisville, CO 80027
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* Copyright (C) 2015 Samsung Electronics Co., Ltd.
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* @Author: Chengjun Wang <cjun.wang@samsung.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_CEA708_DEC_H__
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#define __GST_CEA708_DEC_H__
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#include <gst/gst.h>
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#include <pango/pangocairo.h>
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G_BEGIN_DECLS
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/* from ATSC A/53 Part 4
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* DTVCC packets are 128 bytes MAX, length is only 6 bits, header is 2 bytes,
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* the last byte is flag-fill, that leaves 125 possible bytes of data to be
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* represented in 6 bits, hence the length encoding
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*/
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/* should never be more than 128 */
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#define DTVCC_LENGTH 128
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#define DTVCC_PKT_SIZE(sz_byte) (((sz_byte) == 0) ? 127 : ((sz_byte) * 2) -1)
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#define CCTYPE_VALID_MASK 0x04
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#define CCTYPE_TYPE_MASK 0x03
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#define NUM_608_CCTYPES 2
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/* CEA-708-B commands */
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/* EndOfText */
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#define CC_COMMAND_ETX 0x03
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/* SetCurrentWindow0 */
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#define CC_COMMAND_CW0 0x80
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#define CC_COMMAND_CW1 0x81
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#define CC_COMMAND_CW2 0x82
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#define CC_COMMAND_CW3 0x83
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#define CC_COMMAND_CW4 0x84
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#define CC_COMMAND_CW5 0x85
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#define CC_COMMAND_CW6 0x86
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#define CC_COMMAND_CW7 0x87
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/* ClearWindows */
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#define CC_COMMAND_CLW 0x88
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/* DisplayWindows */
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#define CC_COMMAND_DSW 0x89
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/* HideWindows */
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#define CC_COMMAND_HDW 0x8A
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/* ToggleWindows */
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#define CC_COMMAND_TGW 0x8B
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/* DeleteWindows */
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#define CC_COMMAND_DLW 0x8C
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/* Delay */
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#define CC_COMMAND_DLY 0x8D
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/* DelayCancel */
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#define CC_COMMAND_DLC 0x8E
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/* Reset */
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#define CC_COMMAND_RST 0x8F
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/* SetPenAttributes */
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#define CC_COMMAND_SPA 0x90
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/* SetPenColor */
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#define CC_COMMAND_SPC 0x91
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/* SetPenLocation */
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#define CC_COMMAND_SPL 0x92
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/* SetWindowAttributes */
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#define CC_COMMAND_SWA 0x97
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/* DefineWindow0 */
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#define CC_COMMAND_DF0 0x98
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#define CC_COMMAND_DF1 0x99
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#define CC_COMMAND_DF2 0x9A
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#define CC_COMMAND_DF3 0x9B
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#define CC_COMMAND_DF4 0x9C
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#define CC_COMMAND_DF5 0x9D
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#define CC_COMMAND_DF6 0x9E
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#define CC_COMMAND_DF7 0x9F
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/* music note unicode */
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#define CC_SPECIAL_CODE_MUSIC_NOTE 0x266a
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#define CC_UTF8_MAX_LENGTH 6
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#define CC_MAX_CODE_SET_SIZE 96
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/* Per CEA-708 spec there may be 8 CC windows */
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#define MAX_708_WINDOWS 8
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/* Each 708 window contains a grid of character positions. These are the
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* max limits defined, but each window has a row/col count which is typically
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* smaller than the limits. Note this is just one window, not the entire screen.
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*/
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/* max row count */
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#define WINDOW_MAX_ROWS 15
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/* max column width */
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#define WINDOW_MAX_COLS 42
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/* The linebuffer contains text for 1 line pango text corresponding to 1 line of 708 text.
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* The linebuffer could be a lot larger than the window text because of required markup.
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* example <u> </u> for underline.
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* The size given is an estimate, to be changed if determined that a larger
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* buffer is needed
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*/
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#define LINEBUFFER_SIZE 1024
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/* The screen width/height defined by 708 - not character units, these are
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* used only to determine the position of the anchor on the screen.
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*/
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#define SCREEN_WIDTH_16_9 209
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#define SCREEN_HEIGHT_16_9 74
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#define SCREEN_WIDTH_4_3 159
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#define SCREEN_HEIGHT_4_3 74
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/* raw bytes of "define window" command */
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#define WIN_DEF_SIZE 6
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/* The maximum size of a 708 window in character units. This is used to
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* calculate the position of windows based on window anchor positions.
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*/
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#define SCREEN_HEIGHT_708 15
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#define SCREEN_WIDTH_708 32
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/* cea708 minimum color list */
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#define CEA708_COLOR_INVALID 0xFF
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#define CEA708_COLOR_BLACK 0x00
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#define CEA708_COLOR_WHITE 0x2A
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#define CEA708_COLOR_RED 0x20
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#define CEA708_COLOR_GREEN 0x08
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#define CEA708_COLOR_BLUE 0x02
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#define CEA708_COLOR_YELLOW 0x28
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#define CEA708_COLOR_MAGENTA 0x22
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#define CEA708_COLOR_CYAN 0x0A
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#define CEA708_PANGO_SPAN_MARKUP_START "<span"
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#define CEA708_PANGO_SPAN_MARKUP_END "</span>"
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#define CEA708_PANGO_SPAN_ATTRIBUTES_UNDERLINE_SINGLE " underline='single'"
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#define CEA708_PANGO_SPAN_ATTRIBUTES_STYLE_ITALIC " style='italic'"
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#define CEA708_PANGO_SPAN_ATTRIBUTES_FONT " font_desc="
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#define CEA708_PANGO_SPAN_ATTRIBUTES_FOREGROUND " foreground="
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#define CEA708_PANGO_SPAN_ATTRIBUTES_BACKGROUND " background="
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#define MINIMUM_OUTLINE_OFFSET 1.0
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#define WINDOW_IN_LIST_IS_ACTIVE(list) (list & 0x1)
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typedef struct _Cea708Dec Cea708Dec;
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typedef enum
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{
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COLOR_TYPE_BLACK = 0,
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COLOR_TYPE_WHITE,
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COLOR_TYPE_RED,
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COLOR_TYPE_GREEN,
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COLOR_TYPE_BLUE,
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COLOR_TYPE_YELLOW,
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COLOR_TYPE_MAGENTA,
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COLOR_TYPE_CYAN,
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COLOR_TYPE_RESEVER
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} Cea708ColorType;
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typedef enum
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{
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NO_CHANGE = 0,
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SWITCH_TO_HIDE,
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SWITCH_TO_SHOW,
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TOGGLE
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} VisibilityControl;
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typedef enum
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{
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SOLID = 0,
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FLASH,
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TRANSLUCENT,
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TRANSPARENT
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} Opacity;
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typedef enum
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{
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WIN_STYLE_NORMAL = 1,
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WIN_STYLE_TRANSPARENT,
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WIN_STYLE_NORMAL_CENTERED,
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WIN_STYLE_NORMAL_WORD_WRAP,
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WIN_STYLE_TRANSPARENT_WORD_WRAP,
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WIN_STYLE_TRANSPARENT_CENTERED,
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WIN_STYLE_ROTATED
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} WindowStyle;
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typedef enum
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{
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PEN_STYLE_DEFAULT = 1,
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PEN_STYLE_MONO_SERIF,
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PEN_STYLE_PROP_SERIF,
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PEN_STYLE_MONO_SANS,
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PEN_STYLE_PROP_SANS,
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PEN_STYLE_MONO_SANS_TRANSPARENT,
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PEN_STYLE_PROP_SANS_TRANSPARENT
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} PenStyle;
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typedef enum
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{
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ANCHOR_PT_TOP_LEFT = 0,
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ANCHOR_PT_TOP_CENTER,
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ANCHOR_PT_TOP_RIGHT,
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ANCHOR_PT_MIDDLE_LEFT,
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ANCHOR_PT_CENTER,
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ANCHOR_PT_MIDDLE_RIGHT,
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ANCHOR_PT_BOTTOM_LEFT,
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ANCHOR_PT_BOTTOM_CENTER,
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ANCHOR_PT_BOTTOM_RIGHT,
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} AnchorPoint;
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typedef enum
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{
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TAG_DIALOG = 0,
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TAG_SPEAKER_ID,
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TAG_ELECTRONIC_VOICE,
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TAG_ALT_LANGUAGE_DIALOG,
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TAG_VOICEOVER,
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TAG_AUDIBLE_TRANSLATION,
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TAG_SUBTITLE_TRANSLATION,
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TAG_VOICE_QUALITY_DESCRIPTION,
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TAG_SONG_LYRICS,
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TAG_SOUND_EFFECT_DESCRIPTION,
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TAG_MUSICAL_SCORE_DESCRIPTION,
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TAG_EXPLETIVE,
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TAG_UNDEF1,
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TAG_UNDEF2,
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TAG_UNDEF3,
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TAG_NOT_DISPLAYED
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} TagType;
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typedef enum
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{
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JUSTIFY_LEFT = 0,
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JUSTIFY_RIGHT,
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JUSTIFY_CENTER,
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JUSTIFY_FULL
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} JUSTIFY_MODE;
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typedef enum
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{
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PRINT_DIR_LEFT_TO_RIGHT = 0,
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PRINT_DIR_RIGHT_TO_LEFT,
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PRINT_DIR_TOP_TO_BOTTOM,
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PRINT_DIR_BOTTOM_TO_TOP
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} PRINT_DIRECTION;
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typedef enum
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{
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SCROLL_DIR_LEFT_TO_RIGHT = 0,
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SCROLL_DIR_RIGHT_TO_LEFT,
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SCROLL_DIR_TOP_TO_BOTTOM,
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SCROLL_DIR_BOTTOM_TO_TOP
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} SCROLL_DIRECTION;
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typedef enum
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{
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DISPLAY_EFFECT_SNAP = 0,
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DISPLAY_EFFECT_FADE,
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DISPLAY_EFFECT_WIPE
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} DisplayEffect;
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typedef enum
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{
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EFFECT_DIR_LEFT_TO_RIGHT = 0,
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EFFECT_DIR_RIGHT_TO_LEFT,
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EFFECT_DIR_TOP_TO_BOTTOM,
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EFFECT_DIR_BOTTOM_TO_TOP
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} EFFECT_DIRECTION;
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typedef enum
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{
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BORDER_TYPE_NONE = 0,
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BORDER_TYPE_RAISED,
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BORDER_TYPE_DEPRESSED,
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BORDER_TYPE_UNIFORM
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} BORDER_TYPE;
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typedef enum
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{
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PEN_SIZE_SMALL = 0,
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PEN_SIZE_STANDARD,
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PEN_SIZE_LARGE,
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PEN_SIZE_INVALID
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} PenSize;
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typedef enum
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{
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PEN_OFFSET_SUBSCRIPT = 0,
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PEN_OFFSET_NORMAL,
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PEN_OFFSET_SUPERSCRIPT,
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PEN_OFFSET_INVALID
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} PenOffset;
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typedef enum
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{
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EDGE_TYPE_NONE = 0,
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EDGE_TYPE_RAISED,
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EDGE_TYPE_DEPRESSED,
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EDGE_TYPE_UNIFORM,
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EDGE_TYPE_LEFT_DROP_SHADOW,
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EDGE_TYPE_RIGHT_DROP_SHADOW,
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EDGE_TYPE_INVALID_1,
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EDGE_TYPE_INVALID_2
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} EdgeType;
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typedef enum
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{
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FONT_STYLE_DEFAULT = 0,
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FONT_STYLE_MONO_SERIF,
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FONT_STYLE_PROP_SERIF,
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FONT_STYLE_MONO_SANS,
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FONT_STYLE_PROP_SANS,
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FONT_STYLE_CASUAL,
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FONT_STYLE_CURSIVE,
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FONT_STYLE_SMALLCAPS
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} FontStyle;
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typedef struct
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{
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guint8 fg_color;
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guint8 fg_opacity;
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guint8 bg_color;
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guint8 bg_opacity;
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guint8 edge_color;
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} cea708PenColor;
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typedef struct
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{
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gboolean span_start_flag;
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gboolean span_end_flag;
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gboolean span_txt_flag;
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gboolean span_next_flag;
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gboolean underline;
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gboolean italics;
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guint8 size;
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guint8 fg_color;
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guint8 bg_color;
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FontStyle font_style;
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} cea708PangoSpanControl;
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typedef struct
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{
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PenSize pen_size;
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FontStyle font_style;
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TagType text_tag;
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PenOffset offset;
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gboolean italics;
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gboolean underline;
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EdgeType edge_type;
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} cea708PenAttributes;
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/* The char records one cell location in the window, with the character and all of its attributes */
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typedef struct
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{
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cea708PenColor pen_color;
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cea708PenAttributes pen_attributes;
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guint8 justify_mode;
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gunichar c;
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} cea708char;
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/* This struct keeps track of one cea-708 CC window. There are up to 8. As new
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* windows are created, the text they contain is visible on the screen (if the
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* window visible flag is set). When a window is deleted, all text within the
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* window is erased from the screen. Windows may be initialized and made visible
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* then hidden. Each transition should cause new text cues to be emitted as
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* text is displayed and removed from the screen.
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*/
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typedef struct
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{
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/* The current attributes which will be used for the next text string */
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cea708PenColor pen_color;
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cea708PenAttributes pen_attributes;
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/* true to indicate the window has not been created.
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* set to true on delete, false on subsequent define command
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* if true, reset pen position to 0,0 on window creation
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*/
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gboolean deleted;
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/* Text position */
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guint16 pen_row;
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guint16 pen_col;
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/* window display priority */
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guint8 priority;
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/* window position on screen 0-8 */
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guint8 anchor_point;
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/* 1 = anchor vertical/horizontal coordinates, 0 = physical screen coordinate, aka. rp */
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guint8 relative_position;
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/* vertical position of windows anchor point, 0-74 or if rp=1 then 0-99 */
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guint8 anchor_vertical;
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/* horz position of window anchor point, 0-209(16:9) 0-159(4:3) or if rp=1 then 0-99 */
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guint8 anchor_horizontal;
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/* vert position of upper left corner of window */
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gfloat screen_vertical;
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/* horz position of upper left corner of window */
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gfloat screen_horizontal;
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/* virtual rows of text - 1, (ex. rc=2 means there are 3 rows) */
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guint8 row_count;
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/* virtual columns of text, 0-41(16:9) 0-31(4:3) - 1 */
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guint8 column_count;
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/* 1 = fixes #rows of caption text, 0 = more rows may be added */
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guint8 row_lock;
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/* 1 = fixes #columns of caption text, 0 = more columns may be added */
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guint8 column_lock;
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/* TRUE = window is visible, FALSE = window not visible */
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gboolean visible;
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/* specifies 1 of 7 static preset window. attribute styles, during window create,
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* 0 = use style #1, during window update, 0 = no window, attributes will be changed
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*/
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guint8 style_id;
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/* specifies 1 of 7 static preset pen attributes, during window create,
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* 0 = use pen style #1, during window update, 0 = do not change pen attributes
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*/
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guint8 pen_style_id;
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/* timestamp when this window became visible */
|
||||
guint64 start_time;
|
||||
|
||||
/* window attributes */
|
||||
guint8 justify_mode;
|
||||
guint8 print_direction;
|
||||
guint8 scroll_direction;
|
||||
gboolean word_wrap;
|
||||
guint8 display_effect;
|
||||
guint8 effect_direction;
|
||||
guint8 effect_speed;
|
||||
guint8 fill_color;
|
||||
guint8 fill_opacity;
|
||||
guint8 border_type;
|
||||
guint8 border_color;
|
||||
|
||||
/* Character position offsets for the upper left corner of the window */
|
||||
guint v_offset;
|
||||
guint h_offset;
|
||||
|
||||
/* The char array that text is written into, using the current pen position */
|
||||
cea708char text[WINDOW_MAX_ROWS][WINDOW_MAX_COLS];
|
||||
|
||||
PangoLayout *layout;
|
||||
gdouble shadow_offset;
|
||||
gdouble outline_offset;
|
||||
guchar *text_image;
|
||||
gint image_width;
|
||||
gint image_height;
|
||||
gboolean updated;
|
||||
} cea708Window;
|
||||
|
||||
struct _Cea708Dec
|
||||
{
|
||||
/* output data storage */
|
||||
GSList *text_list;
|
||||
|
||||
/* simulation of 708 CC windows */
|
||||
cea708Window *cc_windows[MAX_708_WINDOWS];
|
||||
guint8 current_window;
|
||||
gchar *default_font_desc;
|
||||
PangoContext *pango_context;
|
||||
|
||||
/* a counter used to ignore bytes in CC text stream following commands */
|
||||
gint8 output_ignore;
|
||||
/* most recent timestamp from userdata */
|
||||
guint64 current_time;
|
||||
|
||||
/* desired_service selects the service that will be decoded. If
|
||||
* desired_service = -1 (default) no decoding based on service number will
|
||||
* occur. Service #0 is reserved, and the valid range of service numbers
|
||||
* is 1-7. with 1 being primary caption service and 2 being the secondary
|
||||
* language service. If service_number is 7, then the extended_service_number is added and used instead of the service_number */
|
||||
gint8 desired_service;
|
||||
|
||||
gboolean use_ARGB;
|
||||
gint width;
|
||||
gint height;
|
||||
};
|
||||
|
||||
Cea708Dec *gst_cea708dec_create (PangoContext * pango_context);
|
||||
void
|
||||
gst_cea708dec_set_service_number (Cea708Dec * decoder, gint8 desired_service);
|
||||
gboolean
|
||||
gst_cea708dec_process_dtvcc_packet (Cea708Dec * decoder, guint8 * dtvcc_buffer, gsize dtvcc_size);
|
||||
void
|
||||
gst_cea708dec_set_video_width_height (Cea708Dec * decoder, gint width, gint height);
|
||||
void gst_cea708_decoder_init_debug(void);
|
||||
|
||||
G_END_DECLS
|
||||
#endif /* __GST_CEA708_DEC_H__ */
|
||||
1957
ext/closedcaption/gstceaccoverlay.c
Normal file
1957
ext/closedcaption/gstceaccoverlay.c
Normal file
File diff suppressed because it is too large
Load diff
136
ext/closedcaption/gstceaccoverlay.h
Normal file
136
ext/closedcaption/gstceaccoverlay.h
Normal file
|
|
@ -0,0 +1,136 @@
|
|||
/* GStreamer
|
||||
* Copyright (C) 2015 Samsung Electronics Co., Ltd.
|
||||
* @Author: Chengjun Wang <cjun.wang@samsung.com>
|
||||
*
|
||||
* 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., 51 Franklin St, Fifth Floor,
|
||||
* Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
|
||||
#ifndef __GST_CEA_CC_OVERLAY_H__
|
||||
#define __GST_CEA_CC_OVERLAY_H__
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include <pango/pangocairo.h>
|
||||
#include <gstcea708decoder.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
#define GST_TYPE_CEA_CC_OVERLAY \
|
||||
(gst_cea_cc_overlay_get_type())
|
||||
#define GST_CEA_CC_OVERLAY(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CEA_CC_OVERLAY,GstCeaCcOverlay))
|
||||
#define GST_CEA_CC_OVERLAY_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CEA_CC_OVERLAY,GstCeaCcOverlayClass))
|
||||
#define GST_CEA_CC_OVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
|
||||
GST_TYPE_CEA_CC_OVERLAY, GstCeaCcOverlayClass))
|
||||
#define GST_IS_CEA_CC_OVERLAY(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CEA_CC_OVERLAY))
|
||||
#define GST_IS_CEA_CC_OVERLAY_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CEA_CC_OVERLAY))
|
||||
|
||||
typedef struct _GstCeaCcOverlay GstCeaCcOverlay;
|
||||
typedef struct _GstCeaCcOverlayClass GstCeaCcOverlayClass;
|
||||
|
||||
typedef enum
|
||||
{
|
||||
CCTYPE_608_CC1 = 0,
|
||||
CCTYPE_608_CC2,
|
||||
CCTYPE_708_ADD,
|
||||
CCTYPE_708_START,
|
||||
} DtvccType;
|
||||
|
||||
/**
|
||||
* GstBaseTextOverlayHAlign:
|
||||
* @GST_CEA_CC_OVERLAY_WIN_H_LEFT: closed caption window horizontal anchor left
|
||||
* @GST_CEA_CC_OVERLAY_WIN_H_CENTER: closed caption window horizontal anchor center
|
||||
* @GST_CEA_CC_OVERLAY_WIN_H_RIGHT: closed caption window horizontal anchor right
|
||||
* @GST_CEA_CC_OVERLAY_WIN_H_AUTO: closed caption window horizontal anchor auto
|
||||
*
|
||||
* Closed Caption Window Horizontal anchor position.
|
||||
*/
|
||||
typedef enum
|
||||
{
|
||||
GST_CEA_CC_OVERLAY_WIN_H_LEFT,
|
||||
GST_CEA_CC_OVERLAY_WIN_H_CENTER,
|
||||
GST_CEA_CC_OVERLAY_WIN_H_RIGHT,
|
||||
GST_CEA_CC_OVERLAY_WIN_H_AUTO
|
||||
} GstCeaCcOverlayWinHPos;
|
||||
|
||||
/**
|
||||
* GstCeaCcOverlay:
|
||||
*
|
||||
* Opaque ccoverlay data structure.
|
||||
*/
|
||||
struct _GstCeaCcOverlay
|
||||
{
|
||||
GstElement parent;
|
||||
GstPad *video_sinkpad;
|
||||
GstPad *cc_sinkpad;
|
||||
GstPad *srcpad;
|
||||
/* There are two possible 608 streams encapsulated by 708 */
|
||||
gint16 cea608_index[NUM_608_CCTYPES];
|
||||
gint16 cea708_index;
|
||||
guint8 cea608_buffer[NUM_608_CCTYPES][DTVCC_LENGTH];
|
||||
guint8 cea708_buffer[DTVCC_LENGTH];
|
||||
|
||||
/* TRUE if input is CDP, FALSE if cc_data triplet */
|
||||
gboolean is_cdp;
|
||||
|
||||
GstSegment segment;
|
||||
GstSegment cc_segment;
|
||||
GstVideoOverlayComposition *current_composition;
|
||||
guint64 current_comp_start_time;
|
||||
GstVideoOverlayComposition *next_composition;
|
||||
guint64 next_comp_start_time;
|
||||
GstCeaCcOverlayWinHPos default_window_h_pos;
|
||||
gboolean cc_pad_linked;
|
||||
gboolean video_flushing;
|
||||
gboolean video_eos;
|
||||
gboolean cc_flushing;
|
||||
gboolean cc_eos;
|
||||
|
||||
GMutex lock;
|
||||
GCond cond; /* to signal removal of a queued text
|
||||
* buffer, arrival of a text buffer,
|
||||
* a text segment update, or a change
|
||||
* in status (e.g. shutdown, flushing) */
|
||||
|
||||
GstVideoInfo info;
|
||||
GstVideoFormat format;
|
||||
gint width;
|
||||
gint height;
|
||||
gboolean silent;
|
||||
Cea708Dec *decoder;
|
||||
gint image_width;
|
||||
gint image_height;
|
||||
|
||||
gboolean need_update;
|
||||
|
||||
gboolean attach_compo_to_buffer;
|
||||
};
|
||||
|
||||
/* FIXME : Pango context and MT-safe since 1.32.6 */
|
||||
struct _GstCeaCcOverlayClass
|
||||
{
|
||||
GstElementClass parent_class;
|
||||
|
||||
PangoContext *pango_context;
|
||||
GMutex *pango_lock;
|
||||
};
|
||||
|
||||
GType gst_cea_cc_overlay_get_type (void);
|
||||
|
||||
G_END_DECLS
|
||||
#endif /* __GST_CEA_CC_OVERLAY_H__ */
|
||||
|
|
@ -27,18 +27,22 @@
|
|||
|
||||
#include "gstccextractor.h"
|
||||
#include "gstline21dec.h"
|
||||
#include "gstceaccoverlay.h"
|
||||
|
||||
static gboolean
|
||||
closedcaption_init (GstPlugin * ccextractor)
|
||||
closedcaption_init (GstPlugin * plugin)
|
||||
{
|
||||
gboolean ret;
|
||||
|
||||
ret = gst_element_register (ccextractor, "ccextractor", GST_RANK_NONE,
|
||||
ret = gst_element_register (plugin, "ccextractor", GST_RANK_NONE,
|
||||
GST_TYPE_CCEXTRACTOR);
|
||||
|
||||
ret &= gst_element_register (ccextractor, "line21decoder", GST_RANK_NONE,
|
||||
ret &= gst_element_register (plugin, "line21decoder", GST_RANK_NONE,
|
||||
GST_TYPE_LINE21DECODER);
|
||||
|
||||
ret = gst_element_register (plugin, "cc708overlay", GST_RANK_PRIMARY,
|
||||
GST_TYPE_CEA_CC_OVERLAY);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -9,7 +9,8 @@ zvbi_sources = [
|
|||
|
||||
if pangocairo_dep.found()
|
||||
gstclosedcaption = library('gstclosedcaption',
|
||||
'gstccextractor.c', 'gstclosedcaption.c', 'gstline21dec.c', zvbi_sources,
|
||||
'gstccextractor.c', 'gstclosedcaption.c', 'gstline21dec.c',
|
||||
'gstcea708decoder.c', 'gstceaccoverlay.c', zvbi_sources,
|
||||
c_args : gst_plugins_bad_args,
|
||||
link_args : noseh_link_args,
|
||||
include_directories : [configinc],
|
||||
|
|
|
|||
Loading…
Reference in a new issue