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b0ce390d50
Instead of only supporting writing SPU data directly to YUV frames, render the SPU data to an intermediate AYUV overlay buffer. The overlay data is then blended to the video frame. For the PGS format, the overlay buffer size is set to the size of the Composition Window, and its position in the overlay composition is set to the window position. The objects to render are now cropped when the cropping flag is set. For the Vobsub format, the overlay buffer size is set to the size of the Display Area. Once rendered, the overlay composition rectangle is now moved and scaled to fit the video output size, to avoid clipping. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5827>
104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/* GStreamer Sub-Picture Unit - VobSub/DVD handling
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* Copyright (C) 2009 Jan Schmidt <thaytan@noraisin.net>
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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 __GSTSPU_VOBSUB_H__
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#define __GSTSPU_VOBSUB_H__
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#include "gstspu-common.h"
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typedef struct SpuVobsubState SpuVobsubState;
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typedef struct SpuVobsubPixCtrlI SpuVobsubPixCtrlI;
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typedef struct SpuVobsubLineCtrlI SpuVobsubLineCtrlI;
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/* Pixel Control Info from a Change Color Contrast command */
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struct SpuVobsubPixCtrlI {
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gint16 left;
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guint32 palette;
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/* Pre-multiplied palette values, updated as
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* needed */
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SpuColour pal_cache[4];
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};
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struct SpuVobsubLineCtrlI {
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guint8 n_changes; /* 1 to 8 */
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SpuVobsubPixCtrlI pix_ctrl_i[8];
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gint16 top;
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gint16 bottom;
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};
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struct SpuVobsubState {
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GstClockTime base_ts; /* base TS for cmd blk delays in running time */
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GstBuffer *buf; /* Current SPU packet we're executing commands from */
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guint16 cur_cmd_blk; /* Offset into the buf for the current cmd block */
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/* Top + Bottom field offsets in the buffer. 0 = not set */
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guint16 pix_data[2];
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GstBuffer *pix_buf; /* Current SPU packet the pix_data references */
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GstMapInfo pix_buf_map; /* Mapped buffer info */
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SpuRect disp_rect;
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SpuRect hl_rect;
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guint32 current_clut[16]; /* Colour lookup table from incoming events */
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guint8 main_idx[4]; /* Indices for current main palette */
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guint8 main_alpha[4]; /* Alpha values for main palette */
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guint8 hl_idx[4]; /* Indices for current highlight palette */
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guint8 hl_alpha[4]; /* Alpha values for highlight palette */
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/* Pre-multiplied colour palette for the main palette */
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SpuColour main_pal[4];
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gboolean main_pal_dirty;
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/* Line control info for rendering the highlight palette */
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SpuVobsubLineCtrlI hl_ctrl_i;
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gboolean hl_pal_dirty; /* Indicates that the HL palette info needs refreshing */
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/* LineCtrlI Info from a Change Color & Contrast command */
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SpuVobsubLineCtrlI *line_ctrl_i;
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gint16 n_line_ctrl_i;
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gboolean line_ctrl_i_pal_dirty; /* Indicates that the palettes for the line_ctrl_i
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* need recalculating */
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/* Rendering state vars below */
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/* Current Y Position */
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gint16 cur_Y;
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/* Current offset in nibbles into the pix_data */
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guint16 max_offset;
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/* current ChgColCon Line Info */
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SpuVobsubLineCtrlI *cur_chg_col;
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SpuVobsubLineCtrlI *cur_chg_col_end;
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};
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void gstspu_vobsub_handle_new_buf (GstDVDSpu * dvdspu, GstClockTime event_ts, GstBuffer *buf);
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gboolean gstspu_vobsub_execute_event (GstDVDSpu *dvdspu);
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void gstspu_vobsub_render (GstDVDSpu *dvdspu, GstVideoFrame *frame);
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gboolean gstspu_vobsub_handle_dvd_event (GstDVDSpu *dvdspu, GstEvent *event);
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void gstspu_vobsub_get_render_geometry (GstDVDSpu *dvdspu,
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gint *display_width, gint *display_height,
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GstVideoRectangle *window_rect);
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void gstspu_vobsub_flush (GstDVDSpu *dvdspu);
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#endif
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