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/* GStreamer DVD Sub-Picture Unit
* Copyright (C) 2007 Fluendo S.A. <info@fluendo.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __DVD_SPU_H__
#define __DVD_SPU_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_DVD_SPU \
(gst_dvd_spu_get_type())
#define GST_DVD_SPU(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DVD_SPU,GstDVDSpu))
#define GST_DVD_SPU_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DVD_SPU,GstDVDSpuClass))
#define GST_IS_DVD_SPU(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DVD_SPU))
#define GST_IS_DVD_SPU_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DVD_SPU))
#define DVD_SPU_LOCK(s) g_mutex_lock ((s)->spu_lock);
#define DVD_SPU_UNLOCK(s) g_mutex_unlock ((s)->spu_lock);
typedef struct _GstDVDSpu GstDVDSpu;
typedef struct _GstDVDSpuClass GstDVDSpuClass;
typedef struct SpuRect SpuRect;
typedef struct SpuPixCtrlI SpuPixCtrlI;
typedef struct SpuLineCtrlI SpuLineCtrlI;
typedef struct SpuColour SpuColour;
typedef enum SpuStateFlags SpuStateFlags;
typedef struct SpuState SpuState;
typedef struct SpuPacket SpuPacket;
typedef enum SpuCmd SpuCmd;
/* Describe the limits of a rectangle */
struct SpuRect {
gint16 left;
gint16 top;
gint16 right;
gint16 bottom;
};
/* Store a pre-multiplied colour value. The YUV fields hold the YUV values
* multiplied by the 8-bit alpha, to save computing it while rendering */
struct SpuColour {
guint16 Y;
guint16 U;
guint16 V;
guint8 A;
};
/* Pixel Control Info from a Change Color Contrast command */
struct SpuPixCtrlI {
gint16 left;
guint32 palette;
/* Pre-multiplied palette values, updated as
* needed */
SpuColour pal_cache[4];
};
struct SpuLineCtrlI {
guint8 n_changes; /* 1 to 8 */
SpuPixCtrlI pix_ctrl_i[8];
gint16 top;
gint16 bottom;
};
enum SpuCmd {
SPU_CMD_FSTA_DSP = 0x00, /* Forced Display */
SPU_CMD_DSP = 0x01, /* Display Start */
SPU_CMD_STP_DSP = 0x02, /* Display Off */
SPU_CMD_SET_COLOR = 0x03, /* Set the color indexes for the palette */
SPU_CMD_SET_ALPHA = 0x04, /* Set the alpha indexes for the palette */
SPU_CMD_SET_DAREA = 0x05, /* Set the display area for the SPU */
SPU_CMD_DSPXA = 0x06, /* Pixel data addresses */
SPU_CMD_CHG_COLCON = 0x07, /* Change Color & Contrast */
SPU_CMD_END = 0xff
};
enum SpuStateFlags {
SPU_STATE_NONE = 0x00,
/* Flags cleared on a flush */
SPU_STATE_DISPLAY = 0x01,
SPU_STATE_FORCED_DSP = 0x02,
SPU_STATE_STILL_FRAME = 0x04,
/* Persistent flags */
SPU_STATE_FORCED_ONLY = 0x100
};
#define SPU_STATE_FLAGS_MASK (0xff)
struct SpuState {
GstClockTime next_ts; /* Next event TS in running time */
GstClockTime base_ts; /* base TS for cmd blk delays in running time */
GstBuffer *buf; /* Current SPU packet we're executing commands from */
guint16 cur_cmd_blk; /* Offset into the buf for the current cmd block */
SpuStateFlags flags;
/* Top + Bottom field offsets in the buffer. 0 = not set */
guint16 pix_data[2];
GstBuffer *pix_buf; /* Current SPU packet the pix_data references */
SpuRect disp_rect;
SpuRect hl_rect;
guint32 current_clut[16]; /* Colour lookup table from incoming events */
guint8 main_idx[4]; /* Indices for current main palette */
guint8 main_alpha[4]; /* Alpha values for main palette */
guint8 hl_idx[4]; /* Indices for current highlight palette */
guint8 hl_alpha[4]; /* Alpha values for highlight palette */
/* Pre-multiplied colour palette for the main palette */
SpuColour main_pal[4];
gboolean main_pal_dirty;
/* Line control info for rendering the highlight palette */
SpuLineCtrlI hl_ctrl_i;
gboolean hl_pal_dirty; /* Indicates that the HL palette info needs refreshing */
/* LineCtrlI Info from a Change Color & Contrast command */
SpuLineCtrlI *line_ctrl_i;
gint16 n_line_ctrl_i;
gboolean line_ctrl_i_pal_dirty; /* Indicates that the palettes for the line_ctrl_i
* need recalculating */
/* Rendering state vars below */
guint16 *comp_bufs[3]; /* Compositing buffers for U+V & A */
gint16 comp_last_x[2]; /* Maximum X values we rendered into the comp buffer (odd & even) */
gint16 *comp_last_x_ptr; /* Ptr to the current comp_last_x value to be updated by the render */
gint16 vid_width, vid_height;
gint16 Y_stride, UV_stride;
gint16 Y_height, UV_height;
gint fps_n, fps_d;
/* Current Y Position */
gint16 cur_Y;
/* Current offset in nibbles into the pix_data */
guint16 cur_offsets[2];
guint16 max_offset;
/* current ChgColCon Line Info */
SpuLineCtrlI *cur_chg_col;
SpuLineCtrlI *cur_chg_col_end;
/* Output position tracking */
guint8 *out_Y;
guint16 *out_U;
guint16 *out_V;
guint16 *out_A;
};
/* Structure used to store the queue of pending SPU packets. The start_ts is
* stored in running time...
* Also used to carry in-band events so they remain serialised properly */
struct SpuPacket {
GstClockTime event_ts;
GstBuffer *buf;
GstEvent *event;
};
struct _GstDVDSpu {
GstElement element;
GstPad *videosinkpad;
GstPad *subpic_sinkpad;
GstPad *srcpad;
/* Mutex to protect state we access from different chain funcs */
GMutex *spu_lock;
GstSegment video_seg;
GstSegment subp_seg;
SpuState spu_state;
/* GQueue of SpuBuf structures */
GQueue *pending_spus;
/* Accumulator for collecting partial SPU buffers until they're complete */
GstBuffer *partial_spu;
/* Store either a reference or a copy of the last video frame for duplication
* during still-frame conditions */
GstBuffer *ref_frame;
/* Buffer to push after handling a DVD event, if any */
GstBuffer *pending_frame;
};
struct _GstDVDSpuClass {
GstElementClass parent_class;
};
GType gst_dvd_spu_get_type (void);
G_END_DECLS
#endif /* __DVD_SPU_H__ */
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