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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1164 lines
33 KiB
C
1164 lines
33 KiB
C
/* GStreamer
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* Copyright (C) <2005> Jan Schmidt <jan@fluendo.com>
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* Copyright (C) <2002> Wim Taymans <wim@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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstdvdsubdec.h"
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#include "gstdvdsubparse.h"
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (gst_dvd_sub_dec_debug);
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#define GST_CAT_DEFAULT (gst_dvd_sub_dec_debug)
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#define gst_dvd_sub_dec_parent_class parent_class
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G_DEFINE_TYPE (GstDvdSubDec, gst_dvd_sub_dec, GST_TYPE_ELEMENT);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (dvdsubdec, "dvdsubdec", GST_RANK_NONE,
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GST_TYPE_DVD_SUB_DEC, GST_DEBUG_CATEGORY_INIT (gst_dvd_sub_dec_debug,
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"dvdsubdec", 0, "DVD subtitle decoder"));
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static gboolean gst_dvd_sub_dec_src_event (GstPad * srcpad, GstObject * parent,
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GstEvent * event);
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static GstFlowReturn gst_dvd_sub_dec_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buf);
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static gboolean gst_dvd_sub_dec_handle_dvd_event (GstDvdSubDec * dec,
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GstEvent * event);
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static void gst_dvd_sub_dec_finalize (GObject * gobject);
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static void gst_setup_palette (GstDvdSubDec * dec);
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static void gst_dvd_sub_dec_merge_title (GstDvdSubDec * dec,
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GstVideoFrame * frame);
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static GstClockTime gst_dvd_sub_dec_get_event_delay (GstDvdSubDec * dec);
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static gboolean gst_dvd_sub_dec_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_dvd_sub_dec_sink_setcaps (GstPad * pad, GstCaps * caps);
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static GstFlowReturn gst_send_subtitle_frame (GstDvdSubDec * dec,
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GstClockTime end_ts);
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, format = (string) { AYUV, ARGB },"
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"width = (int) 720, height = (int) 576, framerate = (fraction) 0/1")
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);
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static GstStaticPadTemplate subtitle_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("subpicture/x-dvd")
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);
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enum
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{
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SPU_FORCE_DISPLAY = 0x00,
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SPU_SHOW = 0x01,
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SPU_HIDE = 0x02,
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SPU_SET_PALETTE = 0x03,
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SPU_SET_ALPHA = 0x04,
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SPU_SET_SIZE = 0x05,
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SPU_SET_OFFSETS = 0x06,
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SPU_WIPE = 0x07,
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SPU_END = 0xff
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};
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static const guint32 default_clut[16] = {
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0xb48080, 0x248080, 0x628080, 0xd78080,
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0x808080, 0x808080, 0x808080, 0x808080,
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0x808080, 0x808080, 0x808080, 0x808080,
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0x808080, 0x808080, 0x808080, 0x808080
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};
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typedef struct RLE_state
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{
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gint id;
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gint aligned;
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gint offset[2];
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gint hl_left;
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gint hl_right;
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guchar *target;
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guchar next;
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}
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RLE_state;
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static void
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gst_dvd_sub_dec_class_init (GstDvdSubDecClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gobject_class->finalize = gst_dvd_sub_dec_finalize;
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gst_element_class_add_static_pad_template (gstelement_class, &src_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&subtitle_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"DVD subtitle decoder", "Codec/Decoder/Video",
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"Decodes DVD subtitles into AYUV video frames",
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"Wim Taymans <wim.taymans@gmail.com>, "
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"Jan Schmidt <thaytan@mad.scientist.com>");
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}
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static void
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gst_dvd_sub_dec_init (GstDvdSubDec * dec)
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{
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GstPadTemplate *tmpl;
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dec->sinkpad = gst_pad_new_from_static_template (&subtitle_template, "sink");
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gst_pad_set_chain_function (dec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_dvd_sub_dec_chain));
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gst_pad_set_event_function (dec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_dvd_sub_dec_sink_event));
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gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
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tmpl = gst_static_pad_template_get (&src_template);
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dec->srcpad = gst_pad_new_from_template (tmpl, "src");
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gst_pad_set_event_function (dec->srcpad,
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GST_DEBUG_FUNCPTR (gst_dvd_sub_dec_src_event));
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gst_pad_use_fixed_caps (dec->srcpad);
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gst_object_unref (tmpl);
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gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
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/* FIXME: aren't there more possible sizes? (tpm) */
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dec->in_width = 720;
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dec->in_height = 576;
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dec->partialbuf = NULL;
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dec->have_title = FALSE;
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dec->parse_pos = NULL;
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dec->forced_display = FALSE;
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dec->visible = FALSE;
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memcpy (dec->current_clut, default_clut, sizeof (guint32) * 16);
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gst_setup_palette (dec);
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dec->next_ts = 0;
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dec->next_event_ts = GST_CLOCK_TIME_NONE;
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dec->buf_dirty = TRUE;
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dec->use_ARGB = FALSE;
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}
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static void
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gst_dvd_sub_dec_finalize (GObject * gobject)
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{
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GstDvdSubDec *dec = GST_DVD_SUB_DEC (gobject);
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if (dec->partialbuf) {
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gst_buffer_unmap (dec->partialbuf, &dec->partialmap);
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gst_buffer_unref (dec->partialbuf);
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dec->partialbuf = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (gobject);
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}
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static gboolean
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gst_dvd_sub_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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gboolean res = FALSE;
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switch (GST_EVENT_TYPE (event)) {
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default:
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res = gst_pad_event_default (pad, parent, event);
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break;
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}
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return res;
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}
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static GstClockTime
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gst_dvd_sub_dec_get_event_delay (GstDvdSubDec * dec)
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{
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guchar *buf;
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guint16 ticks;
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GstClockTime event_delay;
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/* If starting a new buffer, follow the first DCSQ ptr */
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if (dec->parse_pos == dec->partialmap.data) {
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buf = dec->parse_pos + dec->data_size;
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} else {
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buf = dec->parse_pos;
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}
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ticks = GST_READ_UINT16_BE (buf);
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event_delay = gst_util_uint64_scale (ticks, 1024 * GST_SECOND, 90000);
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GST_DEBUG_OBJECT (dec, "returning delay %" GST_TIME_FORMAT " from offset %u",
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GST_TIME_ARGS (event_delay), (guint) (buf - dec->parse_pos));
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return event_delay;
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}
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/*
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* Parse the next event time in the current subpicture buffer, stopping
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* when time advances to the next state.
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*/
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static void
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gst_dvd_sub_dec_parse_subpic (GstDvdSubDec * dec)
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{
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#define PARSE_BYTES_NEEDED(x) if ((buf+(x)) >= end) \
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{ GST_WARNING("Subtitle stream broken parsing %c", *buf); \
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broken = TRUE; break; }
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guchar *start = dec->partialmap.data;
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guchar *buf;
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guchar *end;
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gboolean broken = FALSE;
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gboolean last_seq = FALSE;
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guchar *next_seq = NULL;
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GstClockTime event_time;
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/* nothing to do if we finished this buffer already */
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if (dec->parse_pos == NULL)
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return;
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g_return_if_fail (dec->packet_size >= 4);
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end = start + dec->packet_size;
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if (dec->parse_pos == start) {
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buf = dec->parse_pos + dec->data_size;
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} else {
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buf = dec->parse_pos;
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}
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g_assert (buf >= start && buf < end);
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/* If the next control sequence is at the current offset, this is
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* the last one */
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next_seq = start + GST_READ_UINT16_BE (buf + 2);
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last_seq = (next_seq == buf);
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buf += 4;
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while ((buf < end) && (!broken)) {
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switch (*buf) {
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case SPU_FORCE_DISPLAY: /* Forced display menu subtitle */
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dec->forced_display = TRUE;
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dec->buf_dirty = TRUE;
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GST_DEBUG_OBJECT (dec, "SPU FORCE_DISPLAY");
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buf++;
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break;
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case SPU_SHOW: /* Show the subtitle in this packet */
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dec->visible = TRUE;
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dec->buf_dirty = TRUE;
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GST_DEBUG_OBJECT (dec, "SPU SHOW at %" GST_TIME_FORMAT,
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GST_TIME_ARGS (dec->next_event_ts));
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buf++;
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break;
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case SPU_HIDE:
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/* 02 ff (ff) is the end of the packet, hide the subpicture */
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dec->visible = FALSE;
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dec->buf_dirty = TRUE;
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GST_DEBUG_OBJECT (dec, "SPU HIDE at %" GST_TIME_FORMAT,
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GST_TIME_ARGS (dec->next_event_ts));
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buf++;
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break;
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case SPU_SET_PALETTE: /* palette */
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PARSE_BYTES_NEEDED (3);
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GST_DEBUG_OBJECT (dec, "SPU SET_PALETTE");
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dec->subtitle_index[3] = buf[1] >> 4;
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dec->subtitle_index[2] = buf[1] & 0xf;
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dec->subtitle_index[1] = buf[2] >> 4;
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dec->subtitle_index[0] = buf[2] & 0xf;
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gst_setup_palette (dec);
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dec->buf_dirty = TRUE;
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buf += 3;
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break;
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case SPU_SET_ALPHA: /* transparency palette */
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PARSE_BYTES_NEEDED (3);
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GST_DEBUG_OBJECT (dec, "SPU SET_ALPHA");
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dec->subtitle_alpha[3] = buf[1] >> 4;
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dec->subtitle_alpha[2] = buf[1] & 0xf;
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dec->subtitle_alpha[1] = buf[2] >> 4;
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dec->subtitle_alpha[0] = buf[2] & 0xf;
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gst_setup_palette (dec);
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dec->buf_dirty = TRUE;
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buf += 3;
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break;
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case SPU_SET_SIZE: /* image coordinates */
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PARSE_BYTES_NEEDED (7);
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dec->top = ((buf[4] & 0x3f) << 4) | ((buf[5] & 0xe0) >> 4);
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dec->left = ((buf[1] & 0x3f) << 4) | ((buf[2] & 0xf0) >> 4);
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dec->right = ((buf[2] & 0x03) << 8) | buf[3];
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dec->bottom = ((buf[5] & 0x03) << 8) | buf[6];
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GST_DEBUG_OBJECT (dec, "SPU SET_SIZE left %d, top %d, right %d, "
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"bottom %d", dec->left, dec->top, dec->right, dec->bottom);
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dec->buf_dirty = TRUE;
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buf += 7;
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break;
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case SPU_SET_OFFSETS: /* image 1 / image 2 offsets */
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PARSE_BYTES_NEEDED (5);
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dec->offset[0] = (((guint) buf[1]) << 8) | buf[2];
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dec->offset[1] = (((guint) buf[3]) << 8) | buf[4];
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GST_DEBUG_OBJECT (dec, "Offset1 %d, Offset2 %d",
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dec->offset[0], dec->offset[1]);
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dec->buf_dirty = TRUE;
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buf += 5;
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break;
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case SPU_WIPE:
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{
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guint length;
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PARSE_BYTES_NEEDED (3);
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GST_WARNING_OBJECT (dec, "SPU_WIPE not yet implemented");
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length = (buf[1] << 8) | (buf[2]);
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buf += 1 + length;
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dec->buf_dirty = TRUE;
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break;
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}
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case SPU_END:
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buf = (last_seq) ? end : next_seq;
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/* Start a new control sequence */
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if (buf + 4 < end) {
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guint16 ticks = GST_READ_UINT16_BE (buf);
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event_time = gst_util_uint64_scale (ticks, 1024 * GST_SECOND, 90000);
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GST_DEBUG_OBJECT (dec,
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"Next DCSQ at offset %u, delay %g secs (%d ticks)",
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(guint) (buf - start),
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gst_util_guint64_to_gdouble (event_time / GST_SECOND), ticks);
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dec->parse_pos = buf;
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if (event_time > 0) {
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dec->next_event_ts += event_time;
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GST_LOG_OBJECT (dec, "Exiting parse loop with time %g",
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gst_guint64_to_gdouble (dec->next_event_ts) /
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gst_guint64_to_gdouble (GST_SECOND));
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return;
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}
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break;
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} else {
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dec->parse_pos = NULL;
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dec->next_event_ts = GST_CLOCK_TIME_NONE;
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GST_LOG_OBJECT (dec, "Finished all cmds. Exiting parse loop");
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return;
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}
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default:
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GST_ERROR
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("Invalid sequence in subtitle packet header (%.2x). Skipping",
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*buf);
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broken = TRUE;
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dec->parse_pos = NULL;
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break;
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}
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}
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}
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static inline int
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gst_get_nibble (guchar * buffer, RLE_state * state)
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{
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if (state->aligned) {
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state->next = buffer[state->offset[state->id]++];
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state->aligned = 0;
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return state->next >> 4;
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} else {
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state->aligned = 1;
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return state->next & 0xf;
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}
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}
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/* Premultiply the current lookup table into the "target" cache */
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static void
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gst_setup_palette (GstDvdSubDec * dec)
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{
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gint i;
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guint32 col;
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Color_val *target_yuv = dec->palette_cache_yuv;
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Color_val *target2_yuv = dec->hl_palette_cache_yuv;
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Color_val *target_rgb = dec->palette_cache_rgb;
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Color_val *target2_rgb = dec->hl_palette_cache_rgb;
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for (i = 0; i < 4; i++, target2_yuv++, target_yuv++) {
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col = dec->current_clut[dec->subtitle_index[i]];
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target_yuv->Y_R = (col >> 16) & 0xff;
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target_yuv->V_B = (col >> 8) & 0xff;
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target_yuv->U_G = col & 0xff;
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target_yuv->A = dec->subtitle_alpha[i] * 0xff / 0xf;
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col = dec->current_clut[dec->menu_index[i]];
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target2_yuv->Y_R = (col >> 16) & 0xff;
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target2_yuv->V_B = (col >> 8) & 0xff;
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target2_yuv->U_G = col & 0xff;
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target2_yuv->A = dec->menu_alpha[i] * 0xff / 0xf;
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/* If ARGB flag set, then convert YUV palette to RGB */
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/* Using integer arithmetic */
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if (dec->use_ARGB) {
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guchar C = target_yuv->Y_R - 16;
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guchar D = target_yuv->U_G - 128;
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guchar E = target_yuv->V_B - 128;
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target_rgb->Y_R = CLAMP (((298 * C + 409 * E + 128) >> 8), 0, 255);
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target_rgb->U_G =
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CLAMP (((298 * C - 100 * D - 128 * E + 128) >> 8), 0, 255);
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target_rgb->V_B = CLAMP (((298 * C + 516 * D + 128) >> 8), 0, 255);
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target_rgb->A = target_yuv->A;
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C = target2_yuv->Y_R - 16;
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D = target2_yuv->U_G - 128;
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E = target2_yuv->V_B - 128;
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target2_rgb->Y_R = CLAMP (((298 * C + 409 * E + 128) >> 8), 0, 255);
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target2_rgb->U_G =
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CLAMP (((298 * C - 100 * D - 128 * E + 128) >> 8), 0, 255);
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target2_rgb->V_B = CLAMP (((298 * C + 516 * D + 128) >> 8), 0, 255);
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target2_rgb->A = target2_yuv->A;
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}
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target_rgb++;
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target2_rgb++;
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}
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}
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static inline guint
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gst_get_rle_code (guchar * buffer, RLE_state * state)
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{
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gint code;
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code = gst_get_nibble (buffer, state);
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if (code < 0x4) { /* 4 .. f */
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code = (code << 4) | gst_get_nibble (buffer, state);
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if (code < 0x10) { /* 1x .. 3x */
|
|
code = (code << 4) | gst_get_nibble (buffer, state);
|
|
if (code < 0x40) { /* 04x .. 0fx */
|
|
code = (code << 4) | gst_get_nibble (buffer, state);
|
|
}
|
|
}
|
|
}
|
|
return code;
|
|
}
|
|
|
|
#define DRAW_RUN(target,len,c) \
|
|
G_STMT_START { \
|
|
gint i = 0; \
|
|
if ((c)->A) { \
|
|
for (i = 0; i < (len); i++) { \
|
|
*(target)++ = (c)->A; \
|
|
*(target)++ = (c)->Y_R; \
|
|
*(target)++ = (c)->U_G; \
|
|
*(target)++ = (c)->V_B; \
|
|
} \
|
|
} else { \
|
|
(target) += 4 * (len); \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
/*
|
|
* This function steps over each run-length segment, drawing
|
|
* into the YUVA/ARGB buffers as it goes. UV are composited and then output
|
|
* at half width/height
|
|
*/
|
|
static void
|
|
gst_draw_rle_line (GstDvdSubDec * dec, guchar * buffer, RLE_state * state)
|
|
{
|
|
gint length, colourid;
|
|
guint code;
|
|
gint x, right;
|
|
guchar *target;
|
|
|
|
target = state->target;
|
|
|
|
x = dec->left;
|
|
right = dec->right + 1;
|
|
|
|
while (x < right) {
|
|
gboolean in_hl;
|
|
const Color_val *colour_entry;
|
|
|
|
code = gst_get_rle_code (buffer, state);
|
|
length = code >> 2;
|
|
colourid = code & 3;
|
|
if (dec->use_ARGB)
|
|
colour_entry = dec->palette_cache_rgb + colourid;
|
|
else
|
|
colour_entry = dec->palette_cache_yuv + colourid;
|
|
|
|
/* Length = 0 implies fill to the end of the line */
|
|
/* Restrict the colour run to the end of the line */
|
|
if (length == 0 || x + length > right)
|
|
length = right - x;
|
|
|
|
/* Check if this run of colour touches the highlight region */
|
|
in_hl = ((x <= state->hl_right) && (x + length) >= state->hl_left);
|
|
if (in_hl) {
|
|
gint run;
|
|
|
|
/* Draw to the left of the highlight */
|
|
if (x <= state->hl_left) {
|
|
run = MIN (length, state->hl_left - x + 1);
|
|
|
|
DRAW_RUN (target, run, colour_entry);
|
|
length -= run;
|
|
x += run;
|
|
}
|
|
|
|
/* Draw across the highlight region */
|
|
if (x <= state->hl_right) {
|
|
const Color_val *hl_colour;
|
|
if (dec->use_ARGB)
|
|
hl_colour = dec->hl_palette_cache_rgb + colourid;
|
|
else
|
|
hl_colour = dec->hl_palette_cache_yuv + colourid;
|
|
|
|
run = MIN (length, state->hl_right - x + 1);
|
|
|
|
DRAW_RUN (target, run, hl_colour);
|
|
length -= run;
|
|
x += run;
|
|
}
|
|
}
|
|
|
|
/* Draw the rest of the run */
|
|
if (length > 0) {
|
|
DRAW_RUN (target, length, colour_entry);
|
|
x += length;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Decode the RLE subtitle image and blend with the current
|
|
* frame buffer.
|
|
*/
|
|
static void
|
|
gst_dvd_sub_dec_merge_title (GstDvdSubDec * dec, GstVideoFrame * frame)
|
|
{
|
|
gint y;
|
|
gint Y_stride;
|
|
guchar *buffer = dec->partialmap.data;
|
|
gint hl_top, hl_bottom;
|
|
gint last_y;
|
|
RLE_state state;
|
|
guint8 *Y_data;
|
|
|
|
GST_DEBUG_OBJECT (dec, "Merging subtitle on frame");
|
|
|
|
Y_data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
|
|
Y_stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
|
|
|
|
state.id = 0;
|
|
state.aligned = 1;
|
|
state.next = 0;
|
|
state.offset[0] = dec->offset[0];
|
|
state.offset[1] = dec->offset[1];
|
|
|
|
/* center the image when display rectangle exceeds the video width */
|
|
if (dec->in_width <= dec->right) {
|
|
gint left, disp_width;
|
|
|
|
disp_width = dec->right - dec->left + 1;
|
|
left = (dec->in_width - disp_width) / 2;
|
|
dec->left = left;
|
|
dec->right = left + disp_width - 1;
|
|
|
|
/* if it clips to the right, shift it left, but only till zero */
|
|
if (dec->right >= dec->in_width) {
|
|
gint shift = dec->right - dec->in_width - 1;
|
|
if (shift > dec->left)
|
|
shift = dec->left;
|
|
dec->left -= shift;
|
|
dec->right -= shift;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "clipping width to %d,%d",
|
|
dec->left, dec->in_width - 1);
|
|
}
|
|
|
|
/* for the height, bring it up till it fits as well as it can. We
|
|
* assume the picture is in the lower part. We should better check where it
|
|
* is and do something more clever. */
|
|
if (dec->in_height <= dec->bottom) {
|
|
|
|
/* shift it up, but only till zero */
|
|
gint shift = dec->bottom - dec->in_height - 1;
|
|
if (shift > dec->top)
|
|
shift = dec->top;
|
|
dec->top -= shift;
|
|
dec->bottom -= shift;
|
|
|
|
/* start on even line */
|
|
if (dec->top & 1) {
|
|
dec->top--;
|
|
dec->bottom--;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "clipping height to %d,%d",
|
|
dec->top, dec->in_height - 1);
|
|
}
|
|
|
|
if (dec->current_button) {
|
|
hl_top = dec->hl_top;
|
|
hl_bottom = dec->hl_bottom;
|
|
} else {
|
|
hl_top = -1;
|
|
hl_bottom = -1;
|
|
}
|
|
last_y = MIN (dec->bottom, dec->in_height);
|
|
|
|
y = dec->top;
|
|
state.target = Y_data + 4 * dec->left + (y * Y_stride);
|
|
|
|
/* Now draw scanlines until we hit last_y or end of RLE data */
|
|
for (; ((state.offset[1] < dec->data_size + 2) && (y <= last_y)); y++) {
|
|
/* Set up to draw the highlight if we're in the right scanlines */
|
|
if (y > hl_bottom || y < hl_top) {
|
|
state.hl_left = -1;
|
|
state.hl_right = -1;
|
|
} else {
|
|
state.hl_left = dec->hl_left;
|
|
state.hl_right = dec->hl_right;
|
|
}
|
|
gst_draw_rle_line (dec, buffer, &state);
|
|
|
|
state.target += Y_stride;
|
|
|
|
/* Realign the RLE state for the next line */
|
|
if (!state.aligned)
|
|
gst_get_nibble (buffer, &state);
|
|
state.id = !state.id;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_send_empty_fill (GstDvdSubDec * dec, GstClockTime ts)
|
|
{
|
|
if (dec->next_ts < ts) {
|
|
GST_LOG_OBJECT (dec, "Sending GAP event update to advance time to %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (ts));
|
|
|
|
gst_pad_push_event (dec->srcpad,
|
|
gst_event_new_gap (dec->next_ts, ts - dec->next_ts));
|
|
}
|
|
dec->next_ts = ts;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_send_subtitle_frame (GstDvdSubDec * dec, GstClockTime end_ts)
|
|
{
|
|
GstFlowReturn flow;
|
|
GstBuffer *out_buf;
|
|
GstVideoFrame frame;
|
|
guint8 *data;
|
|
gint x, y;
|
|
static GstAllocationParams params = { 0, 3, 0, 0, };
|
|
|
|
g_assert (dec->have_title);
|
|
g_assert (dec->next_ts <= end_ts);
|
|
|
|
/* Check if we need to redraw the output buffer */
|
|
if (!dec->buf_dirty) {
|
|
flow = GST_FLOW_OK;
|
|
goto out;
|
|
}
|
|
|
|
out_buf =
|
|
gst_buffer_new_allocate (NULL, GST_VIDEO_INFO_SIZE (&dec->info), ¶ms);
|
|
gst_video_frame_map (&frame, &dec->info, out_buf, GST_MAP_READWRITE);
|
|
|
|
data = GST_VIDEO_FRAME_PLANE_DATA (&frame, 0);
|
|
|
|
/* Clear the buffer */
|
|
/* FIXME - move this into the buffer rendering code */
|
|
for (y = 0; y < dec->in_height; y++) {
|
|
guchar *line = data + 4 * dec->in_width * y;
|
|
|
|
for (x = 0; x < dec->in_width; x++) {
|
|
line[0] = 0; /* A */
|
|
if (!dec->use_ARGB) {
|
|
line[1] = 16; /* Y */
|
|
line[2] = 128; /* U */
|
|
line[3] = 128; /* V */
|
|
} else {
|
|
line[1] = 0; /* R */
|
|
line[2] = 0; /* G */
|
|
line[3] = 0; /* B */
|
|
}
|
|
|
|
line += 4;
|
|
}
|
|
}
|
|
|
|
/* FIXME: do we really want to honour the forced_display flag
|
|
* for subtitles streans? */
|
|
if (dec->visible || dec->forced_display) {
|
|
gst_dvd_sub_dec_merge_title (dec, &frame);
|
|
}
|
|
|
|
gst_video_frame_unmap (&frame);
|
|
|
|
dec->buf_dirty = FALSE;
|
|
|
|
GST_BUFFER_TIMESTAMP (out_buf) = dec->next_ts;
|
|
if (GST_CLOCK_TIME_IS_VALID (dec->next_event_ts)) {
|
|
GST_BUFFER_DURATION (out_buf) = GST_CLOCK_DIFF (dec->next_ts,
|
|
dec->next_event_ts);
|
|
} else {
|
|
GST_BUFFER_DURATION (out_buf) = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "Sending subtitle buffer with ts %"
|
|
GST_TIME_FORMAT ", dur %" G_GINT64_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out_buf)),
|
|
GST_BUFFER_DURATION (out_buf));
|
|
|
|
flow = gst_pad_push (dec->srcpad, out_buf);
|
|
|
|
out:
|
|
dec->next_ts = end_ts;
|
|
return flow;
|
|
}
|
|
|
|
/* Walk time forward, processing any subtitle events as needed. */
|
|
static GstFlowReturn
|
|
gst_dvd_sub_dec_advance_time (GstDvdSubDec * dec, GstClockTime new_ts)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
GST_LOG_OBJECT (dec, "Advancing time to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (new_ts));
|
|
|
|
if (!dec->have_title) {
|
|
gst_send_empty_fill (dec, new_ts);
|
|
return ret;
|
|
}
|
|
|
|
while (dec->next_ts < new_ts) {
|
|
GstClockTime next_ts = new_ts;
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (dec->next_event_ts) &&
|
|
dec->next_event_ts < next_ts) {
|
|
/* We might need to process the subtitle cmd queue */
|
|
next_ts = dec->next_event_ts;
|
|
}
|
|
|
|
/*
|
|
* Now, either output a filler or a frame spanning
|
|
* dec->next_ts to next_ts
|
|
*/
|
|
if (dec->visible || dec->forced_display) {
|
|
ret = gst_send_subtitle_frame (dec, next_ts);
|
|
} else {
|
|
gst_send_empty_fill (dec, next_ts);
|
|
}
|
|
|
|
/*
|
|
* and then process some subtitle cmds if we need
|
|
*/
|
|
if (next_ts == dec->next_event_ts)
|
|
gst_dvd_sub_dec_parse_subpic (dec);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_dvd_sub_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstDvdSubDec *dec;
|
|
guint8 *data;
|
|
glong size = 0;
|
|
|
|
dec = GST_DVD_SUB_DEC (parent);
|
|
|
|
GST_DEBUG_OBJECT (dec, "Have buffer of size %" G_GSIZE_FORMAT ", ts %"
|
|
GST_TIME_FORMAT ", dur %" G_GINT64_FORMAT, gst_buffer_get_size (buf),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_DURATION (buf));
|
|
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
|
|
if (!GST_CLOCK_TIME_IS_VALID (dec->next_ts)) {
|
|
dec->next_ts = GST_BUFFER_TIMESTAMP (buf);
|
|
}
|
|
|
|
/* Move time forward to the start of the new buffer */
|
|
ret = gst_dvd_sub_dec_advance_time (dec, GST_BUFFER_TIMESTAMP (buf));
|
|
}
|
|
|
|
if (dec->have_title) {
|
|
gst_buffer_unmap (dec->partialbuf, &dec->partialmap);
|
|
gst_buffer_unref (dec->partialbuf);
|
|
dec->partialbuf = NULL;
|
|
dec->have_title = FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "Got subtitle buffer, pts %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
|
|
|
|
/* deal with partial frame from previous buffer */
|
|
if (dec->partialbuf) {
|
|
gst_buffer_unmap (dec->partialbuf, &dec->partialmap);
|
|
dec->partialbuf = gst_buffer_append (dec->partialbuf, buf);
|
|
} else {
|
|
dec->partialbuf = buf;
|
|
}
|
|
|
|
gst_buffer_map (dec->partialbuf, &dec->partialmap, GST_MAP_READ);
|
|
|
|
data = dec->partialmap.data;
|
|
size = dec->partialmap.size;
|
|
|
|
if (size > 4) {
|
|
dec->packet_size = GST_READ_UINT16_BE (data);
|
|
|
|
if (dec->packet_size == size) {
|
|
GST_LOG_OBJECT (dec, "Subtitle packet size %d, current size %ld",
|
|
dec->packet_size, size);
|
|
|
|
dec->data_size = GST_READ_UINT16_BE (data + 2);
|
|
|
|
/* Reset parameters for a new subtitle buffer */
|
|
dec->parse_pos = data;
|
|
dec->forced_display = FALSE;
|
|
dec->visible = FALSE;
|
|
|
|
dec->have_title = TRUE;
|
|
dec->next_event_ts = GST_BUFFER_TIMESTAMP (dec->partialbuf);
|
|
|
|
if (!GST_CLOCK_TIME_IS_VALID (dec->next_event_ts))
|
|
dec->next_event_ts = dec->next_ts;
|
|
|
|
dec->next_event_ts += gst_dvd_sub_dec_get_event_delay (dec);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dvd_sub_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstDvdSubDec *dec = GST_DVD_SUB_DEC (gst_pad_get_parent (pad));
|
|
gboolean ret = FALSE;
|
|
GstCaps *out_caps = NULL, *peer_caps = NULL;
|
|
|
|
GST_DEBUG_OBJECT (dec, "setcaps called with %" GST_PTR_FORMAT, caps);
|
|
|
|
out_caps = gst_caps_new_simple ("video/x-raw",
|
|
"format", G_TYPE_STRING, "AYUV",
|
|
"width", G_TYPE_INT, dec->in_width,
|
|
"height", G_TYPE_INT, dec->in_height,
|
|
"framerate", GST_TYPE_FRACTION, 0, 1, NULL);
|
|
|
|
peer_caps = gst_pad_get_allowed_caps (dec->srcpad);
|
|
if (G_LIKELY (peer_caps)) {
|
|
guint i = 0, n = 0;
|
|
|
|
n = gst_caps_get_size (peer_caps);
|
|
GST_DEBUG_OBJECT (dec, "peer allowed caps (%u structure(s)) are %"
|
|
GST_PTR_FORMAT, n, peer_caps);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
GstStructure *s = gst_caps_get_structure (peer_caps, i);
|
|
/* Check if the peer pad support ARGB format, if yes change caps */
|
|
if (gst_structure_has_name (s, "video/x-raw")) {
|
|
GstCaps *downstream_caps;
|
|
gst_caps_unref (out_caps);
|
|
GST_DEBUG_OBJECT (dec, "trying with ARGB");
|
|
|
|
out_caps = gst_caps_new_simple ("video/x-raw",
|
|
"format", G_TYPE_STRING, "ARGB",
|
|
"width", G_TYPE_INT, dec->in_width,
|
|
"height", G_TYPE_INT, dec->in_height,
|
|
"framerate", GST_TYPE_FRACTION, 0, 1, NULL);
|
|
|
|
downstream_caps = gst_pad_peer_query_caps (dec->srcpad, NULL);
|
|
if (gst_caps_can_intersect (downstream_caps, out_caps)) {
|
|
gst_caps_unref (downstream_caps);
|
|
GST_DEBUG_OBJECT (dec, "peer accepted ARGB");
|
|
/* If ARGB format then set the flag */
|
|
dec->use_ARGB = TRUE;
|
|
break;
|
|
}
|
|
gst_caps_unref (downstream_caps);
|
|
}
|
|
}
|
|
gst_caps_unref (peer_caps);
|
|
}
|
|
GST_DEBUG_OBJECT (dec, "setting caps downstream to %" GST_PTR_FORMAT,
|
|
out_caps);
|
|
if (gst_pad_set_caps (dec->srcpad, out_caps)) {
|
|
gst_video_info_from_caps (&dec->info, out_caps);
|
|
} else {
|
|
GST_WARNING_OBJECT (dec, "failed setting downstream caps");
|
|
gst_caps_unref (out_caps);
|
|
goto beach;
|
|
}
|
|
|
|
gst_caps_unref (out_caps);
|
|
ret = TRUE;
|
|
|
|
beach:
|
|
gst_object_unref (dec);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dvd_sub_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstDvdSubDec *dec = GST_DVD_SUB_DEC (parent);
|
|
gboolean ret = FALSE;
|
|
|
|
GST_LOG_OBJECT (dec, "%s event", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
ret = gst_dvd_sub_dec_sink_setcaps (pad, caps);
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
case GST_EVENT_CUSTOM_DOWNSTREAM:{
|
|
|
|
if (gst_event_has_name (event, "application/x-gst-dvd")) {
|
|
const GstStructure *s = gst_event_get_structure (event);
|
|
GstClockTime ts = GST_CLOCK_TIME_NONE;
|
|
|
|
if (gst_structure_get_clock_time (s, "ts", &ts)
|
|
&& GST_CLOCK_TIME_IS_VALID (ts))
|
|
gst_dvd_sub_dec_advance_time (dec, ts);
|
|
|
|
if (gst_dvd_sub_dec_handle_dvd_event (dec, event)) {
|
|
/* gst_dvd_sub_dec_advance_time (dec, dec->next_ts + GST_SECOND / 30.0); */
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_GAP:
|
|
{
|
|
GstClockTime start, duration;
|
|
|
|
gst_event_parse_gap (event, &start, &duration);
|
|
if (GST_CLOCK_TIME_IS_VALID (start)) {
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
start += duration;
|
|
/* we do not expect another buffer until after gap,
|
|
* so that is our position now */
|
|
GST_DEBUG_OBJECT (dec, "Got GAP event, advancing time from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (dec->next_ts), GST_TIME_ARGS (start));
|
|
|
|
gst_dvd_sub_dec_advance_time (dec, start);
|
|
} else {
|
|
GST_WARNING_OBJECT (dec, "Got GAP event with invalid position");
|
|
}
|
|
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
GstSegment seg;
|
|
|
|
gst_event_copy_segment (event, &seg);
|
|
|
|
{
|
|
#if 0
|
|
/* Turn off forced highlight display */
|
|
dec->forced_display = 0;
|
|
dec->current_button = 0;
|
|
#endif
|
|
if (dec->partialbuf) {
|
|
gst_buffer_unmap (dec->partialbuf, &dec->partialmap);
|
|
gst_buffer_unref (dec->partialbuf);
|
|
dec->partialbuf = NULL;
|
|
dec->have_title = FALSE;
|
|
}
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (seg.time))
|
|
dec->next_ts = seg.time;
|
|
else
|
|
dec->next_ts = GST_CLOCK_TIME_NONE;
|
|
|
|
GST_DEBUG_OBJECT (dec, "Got newsegment, new time = %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (dec->next_ts));
|
|
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
}
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:{
|
|
/* Turn off forced highlight display */
|
|
dec->forced_display = 0;
|
|
dec->current_button = 0;
|
|
|
|
if (dec->partialbuf) {
|
|
gst_buffer_unmap (dec->partialbuf, &dec->partialmap);
|
|
gst_buffer_unref (dec->partialbuf);
|
|
dec->partialbuf = NULL;
|
|
dec->have_title = FALSE;
|
|
}
|
|
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
default:{
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_dvd_sub_dec_handle_dvd_event (GstDvdSubDec * dec, GstEvent * event)
|
|
{
|
|
GstStructure *structure;
|
|
const gchar *event_name;
|
|
|
|
structure = (GstStructure *) gst_event_get_structure (event);
|
|
|
|
if (structure == NULL)
|
|
goto not_handled;
|
|
|
|
event_name = gst_structure_get_string (structure, "event");
|
|
|
|
GST_LOG_OBJECT (dec,
|
|
"DVD event %s with timestamp %" G_GINT64_FORMAT " on sub pad",
|
|
GST_STR_NULL (event_name), GST_EVENT_TIMESTAMP (event));
|
|
|
|
if (event_name == NULL)
|
|
goto not_handled;
|
|
|
|
if (strcmp (event_name, "dvd-spu-highlight") == 0) {
|
|
gint button;
|
|
gint palette, sx, sy, ex, ey;
|
|
gint i;
|
|
|
|
/* Details for the highlight region to display */
|
|
if (!gst_structure_get_int (structure, "button", &button) ||
|
|
!gst_structure_get_int (structure, "palette", &palette) ||
|
|
!gst_structure_get_int (structure, "sx", &sx) ||
|
|
!gst_structure_get_int (structure, "sy", &sy) ||
|
|
!gst_structure_get_int (structure, "ex", &ex) ||
|
|
!gst_structure_get_int (structure, "ey", &ey)) {
|
|
GST_ERROR_OBJECT (dec, "Invalid dvd-spu-highlight event received");
|
|
return TRUE;
|
|
}
|
|
dec->current_button = button;
|
|
dec->hl_left = sx;
|
|
dec->hl_top = sy;
|
|
dec->hl_right = ex;
|
|
dec->hl_bottom = ey;
|
|
for (i = 0; i < 4; i++) {
|
|
dec->menu_alpha[i] = ((guint32) (palette) >> (i * 4)) & 0x0f;
|
|
dec->menu_index[i] = ((guint32) (palette) >> (16 + (i * 4))) & 0x0f;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "New button activated highlight=(%d,%d) to (%d,%d) "
|
|
"palette 0x%x", sx, sy, ex, ey, palette);
|
|
gst_setup_palette (dec);
|
|
|
|
dec->buf_dirty = TRUE;
|
|
} else if (strcmp (event_name, "dvd-spu-clut-change") == 0) {
|
|
/* Take a copy of the colour table */
|
|
gchar name[16];
|
|
int i;
|
|
gint value;
|
|
|
|
GST_LOG_OBJECT (dec, "New colour table received");
|
|
for (i = 0; i < 16; i++) {
|
|
g_snprintf (name, sizeof (name), "clut%02d", i);
|
|
if (!gst_structure_get_int (structure, name, &value)) {
|
|
GST_ERROR_OBJECT (dec, "dvd-spu-clut-change event did not "
|
|
"contain %s field", name);
|
|
break;
|
|
}
|
|
dec->current_clut[i] = (guint32) (value);
|
|
}
|
|
|
|
gst_setup_palette (dec);
|
|
|
|
dec->buf_dirty = TRUE;
|
|
} else if (strcmp (event_name, "dvd-spu-stream-change") == 0
|
|
|| strcmp (event_name, "dvd-spu-reset-highlight") == 0) {
|
|
/* Turn off forced highlight display */
|
|
dec->current_button = 0;
|
|
|
|
GST_LOG_OBJECT (dec, "Clearing button state");
|
|
dec->buf_dirty = TRUE;
|
|
} else if (strcmp (event_name, "dvd-spu-still-frame") == 0) {
|
|
/* Handle a still frame */
|
|
GST_LOG_OBJECT (dec, "Received still frame notification");
|
|
} else {
|
|
goto not_handled;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
not_handled:
|
|
{
|
|
/* Ignore all other unknown events */
|
|
GST_LOG_OBJECT (dec, "Ignoring other custom event %" GST_PTR_FORMAT,
|
|
structure);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
gboolean ret = FALSE;
|
|
|
|
ret |= GST_ELEMENT_REGISTER (dvdsubdec, plugin);
|
|
ret |= GST_ELEMENT_REGISTER (dvdsubparse, plugin);
|
|
|
|
return ret;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
dvdsub,
|
|
"DVD subtitle parser and decoder", plugin_init,
|
|
VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
|