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, 59 insertions, 0 deletions

diff --git a/stream/tv.h b/stream/tv.h
index 942060b37a..63e9afe78a 100644
--- a/stream/tv.h
+++ b/stream/tv.h
@@ -43,6 +43,11 @@ extern int tv_param_alsa;
 #endif
 extern char* tv_param_adevice;
 #endif
+#ifdef HAVE_TV_TELETEXT
+extern char* tv_param_tdevice;        ///< teletext vbi device
+extern char* tv_param_tformat;        ///< format: text,bw,gray,color
+extern int tv_param_tpage;            ///< page number
+#endif
 extern int tv_param_brightness;
 extern int tv_param_contrast;
 extern int tv_param_hue;
@@ -72,6 +77,9 @@ typedef struct tvi_functions_s
 typedef struct tvi_handle_s {
     tvi_functions_t	*functions;
     void		*priv;
+#ifdef HAVE_TV_TELETEXT
+    void                *priv_vbi;
+#endif
     int 		seq;
 
     /* specific */
@@ -90,6 +98,18 @@ typedef struct tv_channels_s {
     struct tv_channels_s *prev;
 } tv_channels_t;
 
+#ifdef HAVE_TV_TELETEXT
+typedef struct tv_teletext_img_s {
+    void*    canvas;
+    int        tformat;
+    int        columns;
+    int        rows;
+    int        height;
+    int        width;
+    int        half;
+} tv_teletext_img_t;
+#endif
+
 extern tv_channels_t *tv_channel_list;
 extern tv_channels_t *tv_channel_current, *tv_channel_last;
 extern char *tv_channel_last_real;
@@ -153,6 +173,31 @@ extern char *tv_channel_last_real;
 #define TVI_CONTROL_SPC_SET_INPUT	0x402	/* set input channel (tv,s-video,composite..) */
 #define TVI_CONTROL_SPC_GET_NORMID	0x403	/* get normid from norm name */
 
+/* TELETEXT controls */
+#define TVI_CONTROL_VBI_SET_MODE        0x501   ///< on/off grab teletext
+#define TVI_CONTROL_VBI_GET_MODE        0x502   ///< get current mode teletext
+#define TVI_CONTROL_VBI_STEP_MODE       0x503  ///< step teletext mode
+
+#define TVI_CONTROL_VBI_SET_PAGE        0x504   ///< set grab teletext page number
+#define TVI_CONTROL_VBI_STEP_PAGE       0x505   ///< step grab teletext page number
+#define TVI_CONTROL_VBI_GET_PAGE        0x506   ///< get grabbed teletext page
+
+#define TVI_CONTROL_VBI_SET_FORMAT      0x507   ///< set teletext format
+#define TVI_CONTROL_VBI_STEP_FORMAT     0x508   ///< step teletext format
+#define TVI_CONTROL_VBI_GET_FORMAT      0x509   ///< get eletext format
+
+#define TVI_CONTROL_VBI_GET_HALF_PAGE   0x50a   ///< get current half page
+#define TVI_CONTROL_VBI_STEP_HALF_PAGE  0x50b   ///< switch half page
+#define TVI_CONTROL_VBI_SET_HALF_PAGE   0x50c   ///< switch half page
+
+#define TVI_CONTROL_VBI_ADD_DEC         0x50d   ///< add page number with dec
+#define TVI_CONTROL_VBI_GO_LINK         0x50e   ///< go link (1..6)
+#define TVI_CONTROL_VBI_GET_TXTPAGE     0x50f   ///< get grabbed text teletext page
+#define TVI_CONTROL_VBI_GET_IMGPAGE     0x510   ///< get grabbed image teletext page
+#define TVI_CONTROL_VBI_GET_VBIPAGE     0x511   ///< get vbi_image for grabbed teletext page
+#define TVI_CONTROL_VBI_RESET           0x512   ///< vbi reset
+#define TVI_CONTROL_VBI_START           0x513   ///< vbi start
+
 extern tvi_handle_t *tv_begin(void);
 extern int tv_init(tvi_handle_t *tvh);
 extern int tv_uninit(tvi_handle_t *tvh);
@@ -183,6 +228,20 @@ int tv_step_freq(tvi_handle_t *tvh, float step_interval);
 
 int tv_set_norm(tvi_handle_t *tvh, char* norm);
 
+#ifdef HAVE_TV_TELETEXT
+int tv_teletext_control(tvi_handle_t* tvh, int control,void* arg);
+/// add dec to pageno
+int tv_teletext_add_dec(tvi_handle_t *tvh, char *dec);
+/// go link
+int tv_teletext_go_link(tvi_handle_t *tvh, int linkno);
+/// get current vbi_page
+void* tv_get_teletext_vbipage(tvi_handle_t *tvh);
+/// get current page text
+char* tv_get_teletext_txtpage(tvi_handle_t *tvh);
+/// get current page image (RGB32_LB format)
+tv_teletext_img_t* tv_get_teletext_imgpage(tvi_handle_t *tvh);
+#endif
+
 #define TV_NORM_PAL		1
 #define TV_NORM_NTSC		2
 #define TV_NORM_SECAM		3