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717 lines
19 KiB
C
717 lines
19 KiB
C
/* GStreamer
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* Copyright (C) 2003 Martin Soto <martinsoto@users.sourceforge.net>
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*
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* dxr3videosink.c: Video sink for em8300 based cards.
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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 <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <linux/em8300.h>
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#include <gst/gst-i18n-plugin.h>
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#include <gst/gst.h>
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#include "dxr3videosink.h"
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#include "dxr3marshal.h"
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#include "dxr3common.h"
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/* Dxr3VideoSink signals and args */
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enum
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{
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SIGNAL_FLUSHED,
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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};
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/* Possible states for the MPEG start code scanner. */
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enum
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{
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SCAN_STATE_WAITING, /* Waiting for a code. */
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SCAN_STATE_0, /* 0 seen. */
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SCAN_STATE_00, /* 00 seen. */
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SCAN_STATE_001 /* 001 seen. */
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};
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/* Possible states for the MPEG sequence parser. */
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enum
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{
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PARSE_STATE_WAITING, /* Waiting for the start of a sequence. */
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PARSE_STATE_START, /* Start of sequence seen. */
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PARSE_STATE_PICTURE /* Picture start seen. */
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};
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/* Relevant mpeg start codes. */
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#define START_CODE_PICTURE 0x00
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#define START_CODE_SEQUENCE_HEADER 0xB3
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#define START_CODE_SEQUENCE_END 0xB7
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static GstStaticPadTemplate dxr3videosink_sink_factory =
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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 ("video/mpeg, "
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"mpegversion = (int) { 1, 2 }, " "systemstream = (boolean) FALSE"
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/* width/height/framerate omitted, we don't
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* need a parsed stream */
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)
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);
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static void dxr3videosink_class_init (Dxr3VideoSinkClass * klass);
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static void dxr3videosink_base_init (Dxr3VideoSinkClass * klass);
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static void dxr3videosink_init (Dxr3VideoSink * dxr3videosink);
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static void dxr3videosink_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void dxr3videosink_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static gboolean dxr3videosink_open (Dxr3VideoSink * sink);
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static void dxr3videosink_close (Dxr3VideoSink * sink);
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static gboolean dxr3videosink_set_clock (GstElement * element,
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GstClock * clock);
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static void dxr3videosink_reset_parser (Dxr3VideoSink * sink);
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static int dxr3videosink_next_start_code (Dxr3VideoSink * sink);
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static void dxr3videosink_discard_data (Dxr3VideoSink * sink, guint cut);
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static void dxr3videosink_write_data (Dxr3VideoSink * sink, guint cut);
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static void dxr3videosink_parse_data (Dxr3VideoSink * sink);
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static gboolean dxr3videosink_handle_event (GstPad * pad, GstEvent * event);
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static void dxr3videosink_chain (GstPad * pad, GstData * _data);
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static GstStateChangeReturn dxr3videosink_change_state (GstElement * element,
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GstStateChange transition);
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/* static void dxr3videosink_wait (Dxr3VideoSink *sink, */
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/* GstClockTime time); */
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static int dxr3videosink_mvcommand (Dxr3VideoSink * sink, int command);
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static void dxr3videosink_flushed (Dxr3VideoSink * sink);
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static GstElementClass *parent_class = NULL;
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static guint dxr3videosink_signals[LAST_SIGNAL] = { 0 };
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extern GType
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dxr3videosink_get_type (void)
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{
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static GType dxr3videosink_type = 0;
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if (!dxr3videosink_type) {
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static const GTypeInfo dxr3videosink_info = {
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sizeof (Dxr3VideoSinkClass),
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(GBaseInitFunc) dxr3videosink_base_init,
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NULL,
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(GClassInitFunc) dxr3videosink_class_init,
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NULL,
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NULL,
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sizeof (Dxr3VideoSink),
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0,
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(GInstanceInitFunc) dxr3videosink_init,
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};
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dxr3videosink_type = g_type_register_static (GST_TYPE_ELEMENT,
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"Dxr3VideoSink", &dxr3videosink_info, 0);
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}
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return dxr3videosink_type;
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}
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static void
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dxr3videosink_base_init (Dxr3VideoSinkClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&dxr3videosink_sink_factory));
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gst_element_class_set_static_metadata (element_class,
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"dxr3/Hollywood+ mpeg decoder board video element", "Sink/Video",
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"Feeds MPEG2 video to Sigma Designs em8300 based boards",
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"Martin Soto <martinsoto@users.sourceforge.net>");
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}
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static void
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dxr3videosink_class_init (Dxr3VideoSinkClass * 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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parent_class = g_type_class_peek_parent (klass);
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dxr3videosink_signals[SIGNAL_FLUSHED] =
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g_signal_new ("flushed", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (Dxr3VideoSinkClass, flushed),
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NULL, NULL, dxr3_marshal_VOID__VOID, G_TYPE_NONE, 0);
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klass->flushed = dxr3videosink_flushed;
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gobject_class->set_property = dxr3videosink_set_property;
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gobject_class->get_property = dxr3videosink_get_property;
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gstelement_class->change_state = dxr3videosink_change_state;
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gstelement_class->set_clock = dxr3videosink_set_clock;
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}
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static void
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dxr3videosink_init (Dxr3VideoSink * sink)
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{
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GstPad *pad;
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pad = gst_pad_new_from_static_template (&dxr3videosink_sink_factory, "sink");
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gst_element_add_pad (GST_ELEMENT (sink), pad);
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gst_pad_set_chain_function (pad, dxr3videosink_chain);
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GST_OBJECT_FLAG_SET (GST_ELEMENT (sink), GST_ELEMENT_EVENT_AWARE);
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sink->card_number = 0;
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sink->video_filename = NULL;
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sink->video_fd = -1;
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sink->control_filename = NULL;
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sink->control_fd = -1;
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sink->clock = NULL;
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sink->last_ts = GST_CLOCK_TIME_NONE;
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sink->cur_buf = NULL;
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dxr3videosink_reset_parser (sink);
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}
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static void
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dxr3videosink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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Dxr3VideoSink *sink;
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sink = DXR3VIDEOSINK (object);
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switch (prop_id) {
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default:
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break;
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}
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}
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static void
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dxr3videosink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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Dxr3VideoSink *sink;
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g_return_if_fail (GST_IS_DXR3VIDEOSINK (object));
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sink = DXR3VIDEOSINK (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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dxr3videosink_open (Dxr3VideoSink * sink)
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{
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g_return_val_if_fail (!GST_OBJECT_FLAG_IS_SET (sink, DXR3VIDEOSINK_OPEN),
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FALSE);
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/* Compute the name of the video device file. */
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sink->video_filename = g_strdup_printf ("/dev/em8300_mv-%d",
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sink->card_number);
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sink->video_fd = open (sink->video_filename, O_WRONLY);
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if (sink->video_fd < 0) {
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GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE,
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(_("Could not open video device \"%s\" for writing."),
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sink->video_filename), GST_ERROR_SYSTEM);
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return FALSE;
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}
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/* Open the control device. */
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sink->control_filename = g_strdup_printf ("/dev/em8300-%d",
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sink->card_number);
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sink->control_fd = open (sink->control_filename, O_WRONLY);
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if (sink->control_fd < 0) {
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GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE,
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(_("Could not open control device \"%s\" for writing."),
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sink->control_filename), GST_ERROR_SYSTEM);
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return FALSE;
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}
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GST_OBJECT_FLAG_SET (sink, DXR3VIDEOSINK_OPEN);
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return TRUE;
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}
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static void
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dxr3videosink_close (Dxr3VideoSink * sink)
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{
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g_return_if_fail (GST_OBJECT_FLAG_IS_SET (sink, DXR3VIDEOSINK_OPEN));
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if (close (sink->video_fd) != 0) {
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GST_ELEMENT_ERROR (sink, RESOURCE, CLOSE,
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(_("Could not close video device \"%s\"."), sink->video_filename),
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GST_ERROR_SYSTEM);
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return;
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}
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if (close (sink->control_fd) != 0) {
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GST_ELEMENT_ERROR (sink, RESOURCE, CLOSE,
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(_("Could not close control device \"%s\"."), sink->control_filename),
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GST_ERROR_SYSTEM);
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return;
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}
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GST_OBJECT_FLAG_UNSET (sink, DXR3VIDEOSINK_OPEN);
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free (sink->video_filename);
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sink->video_filename = NULL;
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}
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static gboolean
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dxr3videosink_set_clock (GstElement * element, GstClock * clock)
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{
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Dxr3VideoSink *src = DXR3VIDEOSINK (element);
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src->clock = clock;
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return GST_ELEMENT_CLASS (parent_class)->set_clock (element, clock);
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}
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static void
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dxr3videosink_reset_parser (Dxr3VideoSink * sink)
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{
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if (sink->cur_buf != NULL) {
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gst_buffer_unref (sink->cur_buf);
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sink->cur_buf = NULL;
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}
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sink->cur_ts = GST_CLOCK_TIME_NONE;
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sink->scan_state = SCAN_STATE_WAITING;
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sink->scan_pos = 0;
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sink->parse_state = PARSE_STATE_WAITING;
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}
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static int
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dxr3videosink_next_start_code (Dxr3VideoSink * sink)
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{
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guchar c;
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g_return_val_if_fail (sink->cur_buf != NULL, -1);
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while (sink->scan_pos < GST_BUFFER_SIZE (sink->cur_buf)) {
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c = (GST_BUFFER_DATA (sink->cur_buf))[sink->scan_pos];
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switch (sink->scan_state) {
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case SCAN_STATE_WAITING:
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if (c == 0x00) {
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sink->scan_state = SCAN_STATE_0;
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}
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break;
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case SCAN_STATE_0:
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if (c == 0x00) {
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sink->scan_state = SCAN_STATE_00;
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} else {
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sink->scan_state = SCAN_STATE_WAITING;
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}
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break;
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case SCAN_STATE_00:
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if (c == 0x01) {
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sink->scan_state = SCAN_STATE_001;
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} else if (c != 0x00) {
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sink->scan_state = SCAN_STATE_WAITING;
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}
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break;
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case SCAN_STATE_001:
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sink->scan_pos++;
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sink->scan_state = SCAN_STATE_WAITING;
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return c;
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}
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sink->scan_pos++;
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}
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return -1;
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}
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static void
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dxr3videosink_discard_data (Dxr3VideoSink * sink, guint cut)
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{
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GstBuffer *sub;
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guint size;
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g_return_if_fail (sink->cur_buf != NULL);
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g_assert (cut <= sink->scan_pos);
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size = sink->scan_pos - cut;
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g_return_if_fail (size <= GST_BUFFER_SIZE (sink->cur_buf));
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if (GST_BUFFER_SIZE (sink->cur_buf) == size) {
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gst_buffer_unref (sink->cur_buf);
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sink->cur_buf = NULL;
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} else {
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sub = gst_buffer_create_sub (sink->cur_buf, size,
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GST_BUFFER_SIZE (sink->cur_buf)
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- size);
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gst_buffer_unref (sink->cur_buf);
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sink->cur_buf = sub;
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}
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sink->scan_state = SCAN_STATE_WAITING;
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sink->scan_pos = cut;
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sink->cur_ts = GST_CLOCK_TIME_NONE;
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}
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static void
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dxr3videosink_write_data (Dxr3VideoSink * sink, guint cut)
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{
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guint size, written;
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guint8 *data;
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g_return_if_fail (sink->cur_buf != NULL);
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if (GST_OBJECT_FLAG_IS_SET (sink, DXR3VIDEOSINK_OPEN)) {
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if (sink->cur_ts != GST_CLOCK_TIME_NONE) {
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guint pts;
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/* fprintf (stderr, "------ Video Time %.04f\n", */
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/* (double) sink->cur_ts / GST_SECOND); */
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pts = (guint) GSTTIME_TO_MPEGTIME (sink->cur_ts);
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ioctl (sink->video_fd, EM8300_IOCTL_VIDEO_SETPTS, &pts);
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sink->cur_ts = GST_CLOCK_TIME_NONE;
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}
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data = GST_BUFFER_DATA (sink->cur_buf);
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size = sink->scan_pos - cut;
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g_assert (size <= GST_BUFFER_SIZE (sink->cur_buf));
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/* We should always write data that corresponds to whole MPEG
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video sintactical elements. They should always start with an
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MPEG start code. */
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g_assert (size >= 4 && data[0] == 0 && data[1] == 0 && data[2] == 1);
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while (size > 0) {
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written = write (sink->video_fd, data, size);
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if (written < 0) {
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GST_ELEMENT_ERROR (sink, RESOURCE, WRITE,
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(_("Could not write to device \"%s\"."), sink->video_filename),
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GST_ERROR_SYSTEM);
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break;
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}
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size = size - written;
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data = data + written;
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};
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}
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dxr3videosink_discard_data (sink, cut);
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}
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static void
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dxr3videosink_parse_data (Dxr3VideoSink * sink)
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{
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int code;
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/* Timestamp handling assumes that timestamps are associated to
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sequence starts. This seems to be the case, at least for
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DVDs. */
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code = dxr3videosink_next_start_code (sink);
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while (code >= 0) {
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switch (sink->parse_state) {
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case PARSE_STATE_WAITING:
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if (code == START_CODE_SEQUENCE_HEADER) {
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dxr3videosink_discard_data (sink, 4);
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sink->parse_state = PARSE_STATE_START;
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sink->cur_ts = sink->last_ts;
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}
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break;
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case PARSE_STATE_START:
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switch (code) {
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case START_CODE_SEQUENCE_HEADER:
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dxr3videosink_discard_data (sink, 4);
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sink->cur_ts = sink->last_ts;
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break;
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case START_CODE_SEQUENCE_END:
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dxr3videosink_discard_data (sink, 0);
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sink->parse_state = PARSE_STATE_WAITING;
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break;
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case START_CODE_PICTURE:
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sink->parse_state = PARSE_STATE_PICTURE;
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break;
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}
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break;
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case PARSE_STATE_PICTURE:
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switch (code) {
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case START_CODE_SEQUENCE_HEADER:
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dxr3videosink_write_data (sink, 4);
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sink->parse_state = PARSE_STATE_START;
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sink->cur_ts = sink->last_ts;
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break;
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case START_CODE_SEQUENCE_END:
|
|
dxr3videosink_write_data (sink, 0);
|
|
sink->parse_state = PARSE_STATE_WAITING;
|
|
break;
|
|
case START_CODE_PICTURE:
|
|
dxr3videosink_write_data (sink, 4);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
code = dxr3videosink_next_start_code (sink);
|
|
}
|
|
|
|
if (sink->parse_state == PARSE_STATE_WAITING) {
|
|
dxr3videosink_discard_data (sink, 0);
|
|
}
|
|
}
|
|
|
|
|
|
static gboolean
|
|
dxr3videosink_handle_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstEventType type;
|
|
Dxr3VideoSink *sink;
|
|
|
|
sink = DXR3VIDEOSINK (gst_pad_get_parent (pad));
|
|
|
|
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
|
|
|
|
switch (type) {
|
|
case GST_EVENT_EMPTY:
|
|
//fprintf (stderr, "++++++ Video empty event\n");
|
|
{
|
|
/* FIXME: Handle this with a discontinuity or something. */
|
|
/* Write an MPEG2 sequence end code, to ensure that the card
|
|
actually displays the last picture. Apparently some DVDs are
|
|
encoded without proper sequence end codes. */
|
|
static const guint8 sec[4] = { 0x00, 0x00, 0x01, 0xb7 };
|
|
|
|
if (sink->cur_buf != NULL) {
|
|
dxr3videosink_write_data (sink, 0);
|
|
}
|
|
|
|
write (sink->video_fd, &sec, 4);
|
|
}
|
|
break;
|
|
|
|
case GST_EVENT_DISCONTINUOUS:
|
|
//fprintf (stderr, "++++++ Video discont event\n");
|
|
{
|
|
gint64 time;
|
|
gboolean has_time;
|
|
unsigned cur_scr, mpeg_scr, diff;
|
|
|
|
has_time = gst_event_discont_get_value (event, GST_FORMAT_TIME, &time);
|
|
if (has_time) {
|
|
/* fprintf (stderr, "^^^^^^ Discontinuous event has time %.4f\n", */
|
|
/* (double) time / GST_SECOND); */
|
|
|
|
/* If the SCR in the card is way off, fix it. */
|
|
ioctl (sink->control_fd, EM8300_IOCTL_SCR_GET, &cur_scr);
|
|
mpeg_scr = MPEGTIME_TO_DXRTIME (GSTTIME_TO_MPEGTIME (time));
|
|
|
|
diff = cur_scr > mpeg_scr ? cur_scr - mpeg_scr : mpeg_scr - cur_scr;
|
|
if (diff > 1800) {
|
|
unsigned zero = 0;
|
|
|
|
/* fprintf (stderr, "====== Adjusting SCR from video\n"); */
|
|
|
|
ioctl (sink->control_fd, EM8300_IOCTL_SCR_SET, &zero);
|
|
ioctl (sink->control_fd, EM8300_IOCTL_SCR_SET, &mpeg_scr);
|
|
}
|
|
} else {
|
|
/* fprintf (stderr, "^^^^^^ Discontinuous event has no time\n"); */
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GST_EVENT_FLUSH:
|
|
dxr3videosink_reset_parser (sink);
|
|
break;
|
|
|
|
default:
|
|
gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static void
|
|
dxr3videosink_chain (GstPad * pad, GstData * _data)
|
|
{
|
|
GstBuffer *buf = GST_BUFFER (_data);
|
|
Dxr3VideoSink *sink;
|
|
|
|
g_return_if_fail (pad != NULL);
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (buf != NULL);
|
|
|
|
sink = DXR3VIDEOSINK (gst_pad_get_parent (pad));
|
|
|
|
if (GST_IS_EVENT (buf)) {
|
|
dxr3videosink_handle_event (pad, GST_EVENT (buf));
|
|
return;
|
|
}
|
|
|
|
/* fprintf (stderr, "^^^^^^ Video block\n"); */
|
|
|
|
if (sink->cur_buf == NULL) {
|
|
sink->cur_buf = buf;
|
|
} else {
|
|
sink->cur_buf = gst_buffer_append (sink->cur_buf, buf);
|
|
}
|
|
|
|
sink->last_ts = GST_BUFFER_TIMESTAMP (buf);
|
|
|
|
dxr3videosink_parse_data (sink);
|
|
}
|
|
|
|
|
|
static GstStateChangeReturn
|
|
dxr3videosink_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
g_return_val_if_fail (GST_IS_DXR3VIDEOSINK (element),
|
|
GST_STATE_CHANGE_FAILURE);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
if (!GST_OBJECT_FLAG_IS_SET (element, DXR3VIDEOSINK_OPEN)) {
|
|
if (!dxr3videosink_open (DXR3VIDEOSINK (element))) {
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
}
|
|
}
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
dxr3videosink_mvcommand (DXR3VIDEOSINK (element), MVCOMMAND_PAUSE);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
dxr3videosink_mvcommand (DXR3VIDEOSINK (element), MVCOMMAND_START);
|
|
break;
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
dxr3videosink_mvcommand (DXR3VIDEOSINK (element), MVCOMMAND_PAUSE);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
dxr3videosink_mvcommand (DXR3VIDEOSINK (element), MVCOMMAND_STOP);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
if (GST_OBJECT_FLAG_IS_SET (element, DXR3VIDEOSINK_OPEN)) {
|
|
dxr3videosink_close (DXR3VIDEOSINK (element));
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (GST_ELEMENT_CLASS (parent_class)->change_state) {
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
}
|
|
|
|
return GST_STATE_CHANGE_SUCCESS;
|
|
}
|
|
|
|
#if 0
|
|
/**
|
|
* dxr3videosink_wait:
|
|
*
|
|
* Make the sink wait the specified amount of time.
|
|
*/
|
|
static void
|
|
dxr3videosink_wait (Dxr3VideoSink * sink, GstClockTime time)
|
|
{
|
|
GstClockID id;
|
|
GstClockTimeDiff jitter;
|
|
GstClockReturn ret;
|
|
GstClockTime current_time = gst_clock_get_time (sink->clock);
|
|
|
|
id = gst_clock_new_single_shot_id (sink->clock, current_time + time);
|
|
ret = gst_clock_id_wait (id, &jitter);
|
|
gst_clock_id_free (id);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* dxr3videosink_mvcommand
|
|
*
|
|
* Send an MVCOMMAND to the card.
|
|
*/
|
|
static int
|
|
dxr3videosink_mvcommand (Dxr3VideoSink * sink, int command)
|
|
{
|
|
em8300_register_t regs;
|
|
|
|
regs.microcode_register = 1;
|
|
regs.reg = 0;
|
|
regs.val = command;
|
|
|
|
return ioctl (sink->control_fd, EM8300_IOCTL_WRITEREG, ®s);
|
|
}
|
|
|
|
|
|
/**
|
|
* dxr3videosink_flushed:
|
|
*
|
|
* Default do nothing implementation for the "flushed" signal. The
|
|
* "flushed" signal will be fired right after flushing the hardware
|
|
* queues due to a received flush event
|
|
*/
|
|
static void
|
|
dxr3videosink_flushed (Dxr3VideoSink * sink)
|
|
{
|
|
/* Do nothing. */
|
|
}
|