mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
Refactor the DVD subpicture compositing, switching it to 8-bit alpha calculations. Reuse some of the resulting code to implement PGS subpicture blending. Implement parsing and collecting of composition objects properly, but assuming a single active window and colour palette for now. I need more PGS samples.
110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/* GStreamer Sub-Picture Unit - VobSub/DVD handling
|
|
* Copyright (C) 2009 Jan Schmidt <thaytan@noraisin.net>
|
|
*
|
|
* 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 __GSTSPU_VOBSUB_H__
|
|
#define __GSTSPU_VOBSUB_H__
|
|
|
|
#include "gstspu-common.h"
|
|
|
|
typedef struct SpuVobsubState SpuVobsubState;
|
|
typedef struct SpuVobsubPixCtrlI SpuVobsubPixCtrlI;
|
|
typedef struct SpuVobsubLineCtrlI SpuVobsubLineCtrlI;
|
|
|
|
/* Pixel Control Info from a Change Color Contrast command */
|
|
struct SpuVobsubPixCtrlI {
|
|
gint16 left;
|
|
guint32 palette;
|
|
|
|
/* Pre-multiplied palette values, updated as
|
|
* needed */
|
|
SpuColour pal_cache[4];
|
|
};
|
|
|
|
struct SpuVobsubLineCtrlI {
|
|
guint8 n_changes; /* 1 to 8 */
|
|
SpuVobsubPixCtrlI pix_ctrl_i[8];
|
|
|
|
gint16 top;
|
|
gint16 bottom;
|
|
};
|
|
|
|
struct SpuVobsubState {
|
|
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 */
|
|
|
|
/* 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 clip_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 */
|
|
SpuVobsubLineCtrlI hl_ctrl_i;
|
|
gboolean hl_pal_dirty; /* Indicates that the HL palette info needs refreshing */
|
|
|
|
/* LineCtrlI Info from a Change Color & Contrast command */
|
|
SpuVobsubLineCtrlI *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 */
|
|
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 */
|
|
|
|
/* 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 */
|
|
SpuVobsubLineCtrlI *cur_chg_col;
|
|
SpuVobsubLineCtrlI *cur_chg_col_end;
|
|
|
|
/* Output position tracking */
|
|
guint8 *out_Y;
|
|
guint32 *out_U;
|
|
guint32 *out_V;
|
|
guint32 *out_A;
|
|
};
|
|
|
|
void gstspu_vobsub_handle_new_buf (GstDVDSpu * dvdspu, GstClockTime event_ts, GstBuffer *buf);
|
|
gboolean gstspu_vobsub_execute_event (GstDVDSpu *dvdspu);
|
|
void gstspu_vobsub_render (GstDVDSpu *dvdspu, GstBuffer *buf);
|
|
gboolean gstspu_vobsub_handle_dvd_event (GstDVDSpu *dvdspu, GstEvent *event);
|
|
void gstspu_vobsub_flush (GstDVDSpu *dvdspu);
|
|
|
|
#endif
|