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5016a73190
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 attached to the video frame if downstream supports overlay composition, otherwise the AYUV overlay is 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. https://bugzilla.gnome.org/show_bug.cgi?id=663750
136 lines
3.6 KiB
C
136 lines
3.6 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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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GstVideoInfo info;
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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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/* Overlay composition */
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gboolean attach_compo_to_buffer;
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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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typedef enum {
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GST_DVD_SPU_DEBUG_RENDER_RECTANGLE = (1 << 0),
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GST_DVD_SPU_DEBUG_HIGHLIGHT_RECTANGLE = (1 << 1)
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} GstDVDSPUDebugFlags;
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extern GstDVDSPUDebugFlags dvdspu_debug_flags;
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G_END_DECLS
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#endif /* __GST_DVD_SPU_H__ */
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