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b68a05dbfa
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.
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/* GStreamer DVD Sub-Picture Unit
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* Copyright (C) 2007 Fluendo S.A. <info@fluendo.com>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_DVD_SPU_H__
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#define __GST_DVD_SPU_H__
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#include <gst/gst.h>
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#include "gstspu-common.h"
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#include "gstspu-vobsub.h"
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#include "gstspu-pgs.h"
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G_BEGIN_DECLS
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#define GST_TYPE_DVD_SPU \
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(gst_dvd_spu_get_type())
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#define GST_DVD_SPU(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DVD_SPU,GstDVDSpu))
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#define GST_DVD_SPU_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DVD_SPU,GstDVDSpuClass))
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#define GST_IS_DVD_SPU(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DVD_SPU))
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#define GST_IS_DVD_SPU_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DVD_SPU))
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#define DVD_SPU_LOCK(s) g_mutex_lock ((s)->spu_lock);
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#define DVD_SPU_UNLOCK(s) g_mutex_unlock ((s)->spu_lock);
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typedef struct _GstDVDSpuClass GstDVDSpuClass;
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typedef enum SpuStateFlags SpuStateFlags;
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typedef enum SpuInputType SpuInputType;
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typedef struct SpuPacket SpuPacket;
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enum SpuInputType {
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SPU_INPUT_TYPE_NONE = 0x00,
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SPU_INPUT_TYPE_VOBSUB = 0x01,
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SPU_INPUT_TYPE_PGS = 0x02
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};
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enum SpuStateFlags {
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SPU_STATE_NONE = 0x00,
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/* Flags cleared on a flush */
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SPU_STATE_DISPLAY = 0x01,
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SPU_STATE_FORCED_DSP = 0x02,
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SPU_STATE_STILL_FRAME = 0x04,
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/* Persistent flags */
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SPU_STATE_FORCED_ONLY = 0x100
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};
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#define SPU_STATE_FLAGS_MASK (0xff)
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struct SpuState {
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GstClockTime next_ts; /* Next event TS in running time */
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SpuStateFlags flags;
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gint fps_n, fps_d;
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gint16 vid_width, vid_height;
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gint16 Y_stride, UV_stride;
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gint16 Y_height, UV_height;
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guint32 *comp_bufs[3]; /* Compositing buffers for U+V & A */
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guint16 comp_left;
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guint16 comp_right;
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SpuVobsubState vobsub;
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SpuPgsState pgs;
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};
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/* Structure used to store the queue of pending SPU packets. The start_ts is
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* stored in running time...
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* Also used to carry in-band events so they remain serialised properly */
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struct SpuPacket {
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GstClockTime event_ts;
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GstBuffer *buf;
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GstEvent *event;
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};
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struct _GstDVDSpu {
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GstElement element;
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GstPad *videosinkpad;
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GstPad *subpic_sinkpad;
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GstPad *srcpad;
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/* Mutex to protect state we access from different chain funcs */
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GMutex *spu_lock;
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GstSegment video_seg;
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GstSegment subp_seg;
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SpuState spu_state;
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SpuInputType spu_input_type;
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/* GQueue of SpuBuf structures */
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GQueue *pending_spus;
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/* Accumulator for collecting partial SPU buffers until they're complete */
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GstBuffer *partial_spu;
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/* Store either a reference or a copy of the last video frame for duplication
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* during still-frame conditions */
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GstBuffer *ref_frame;
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/* Buffer to push after handling a DVD event, if any */
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GstBuffer *pending_frame;
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};
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struct _GstDVDSpuClass {
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GstElementClass parent_class;
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};
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GType gst_dvd_spu_get_type (void);
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G_END_DECLS
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#endif /* __GST_DVD_SPU_H__ */
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