Teletext support for tv:// (v4l and v4l2 only)

modified patch from Otvos Attila oattila at chello dot hu

Module uses zvbi library for all low-level  VBI operations (like I/O with vbi
device, converting vbi pages into usefull vbi_page stuctures, rendering them
into RGB32 images).

All teletext related stuff (except properties, slave commands and rendering
osd in text mode or RGB32 rendered teletext pages in spu mode) is implemented
in tvi_vbi.c

New properties:
teletext_page - switching between pages
teletext_mode - switch between on/off/opaque/transparent modes
teletext_format - (currently read-only) allows to get format info
(black/white,gray,text)
teletext_half_page - trivial zooming (displaying top/bottom half of teletext
page)

New slave commands:
teletext_add_dec - user interface for jumping to any page by editing page number
interactively
teletext_go_link - goes though links, specified on current page



git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@23530 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 75 insertions, 0 deletions

diff --git a/stream/tvi_vbi.h b/stream/tvi_vbi.h
new file mode 100644
index 0000000000..7bbf913e7c
--- /dev/null
+++ b/stream/tvi_vbi.h
@@ -0,0 +1,75 @@
+#ifndef __TVI_VBI_H_
+#define __TVI_VBI_H_
+
+#include "libzvbi.h"
+#include "libmpcodecs/img_format.h"
+#include "libmpcodecs/mp_image.h"
+#include "tv.h"
+
+#define VBI_MAX_SUBPAGES   64               ///< max sub pages number
+#define VBI_TXT_PAGE_SIZE  42*25*2          ///< max text page size
+#define VBI_MAX_LINE_SIZE  42               ///< max line size in text page
+
+#define VBI_TFORMAT_TEXT    0               ///< text mode
+#define VBI_TFORMAT_BW      1               ///< back&white mode
+#define VBI_TFORMAT_GRAY    2               ///< grayscale mode
+#define VBI_TFORMAT_COLOR   3               ///< color mode (require color_spu patch!)
+
+#define VBI_NO_TELETEXT    "No teletext"
+
+#define VBI_TRANSPARENT_COLOR    40         ///< transparent color id
+#define VBI_TIME_LINEPOS    13              ///< time line pos in page header
+
+typedef struct {
+    int            on;                      ///< teletext on/off
+
+    char*        device;                    ///< capture device
+    unsigned int    services;               ///< services
+    vbi_capture*    capture;                ///< vbi_capture
+    int            capture_fd;              ///< capture fd (now not used)
+    vbi_decoder*    decoder;                ///< vbi_decoder
+    char*        errstr;                    ///< error string
+    pthread_t        grabber_thread;        ///< grab thread
+    pthread_mutex_t    buffer_mutex;
+    pthread_mutex_t    update_mutex;
+    int            eof;                     ///< end grab
+    int           tpage;                    ///< tpage
+    int            pgno;                    ///< seek page number
+    int            subno;                   ///< seek subpage
+    int            curr_pgno;               ///< current page number
+    int            curr_subno;              ///< current subpage
+    uint32_t       pagenumdec;              ///< set page num with dec
+
+    vbi_page** cache;
+    vbi_page         *page;                 ///< vbi_page
+    int            valid_page;              ///< valid page flag
+    char*        txtpage;                   ///< decoded vbi_page to text
+    vbi_char    theader[VBI_MAX_LINE_SIZE]; ///< vbi header
+    char        header[VBI_MAX_LINE_SIZE];  ///< text header
+
+    int            tformat;                 ///< 0:text, 1:bw, 2:gray, 3:color
+    vbi_pixfmt         fmt;                 ///< image format (only VBI_PIXFMT_RGBA32_LE supported)
+    void*        canvas;                    ///< stored image data
+    int            csize;                   ///< stored image size
+    int            canvas_size;             ///< image buffer size
+    int            reveal;                  ///< reveal (now not used)
+    int            flash_on;                ///< flash_on (now not used)
+    int            alpha;                   ///< opacity mode
+    int            foreground;              ///< foreground black in bw mode
+    int            half;                    ///< 0:half mode off, 1:top half page, 2:bottom half page
+    int            redraw;                  ///< is redraw last image
+    int            columns;                 ///< page size: coloumns
+    int            rows;                    ///< page size: rows
+    int            spudec_proc;             ///< render image request
+
+    char*        network_name;              ///< network name
+    char*        network_id;                ///< network id
+    } priv_vbi_t;
+
+/// teletext subsystem initialization
+priv_vbi_t* teletext_init(void);
+/// teletext subsystem uninitialization
+void teletext_uninit(priv_vbi_t* priv_vbi);
+/// ioctl for 
+int teletext_control(priv_vbi_t* priv_vbi, int cmd, void *args);
+#endif