--- /dev/null
+/* GStreamer
+ *
+ * gstv4lmjpegsink.c: hardware MJPEG video sink plugin
+ *
+ * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include "v4lmjpegsink_calls.h"
+
+GST_DEBUG_CATEGORY_STATIC (v4lmjpegsink_debug);
+#define GST_CAT_DEFAULT v4lmjpegsink_debug
+
+/* v4lmjpegsink signals and args */
+enum
+{
+ SIGNAL_FRAME_DISPLAYED,
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0,
+ ARG_NUMBUFS,
+ ARG_BUFSIZE,
+ ARG_X_OFFSET,
+ ARG_Y_OFFSET,
+ ARG_FRAMES_DISPLAYED,
+ ARG_FRAME_TIME
+};
+
+
+/* init functions */
+static void gst_v4lmjpegsink_base_init (gpointer g_class);
+static void gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass * klass);
+static void gst_v4lmjpegsink_init (GstV4lMjpegSink * v4lmjpegsink);
+
+/* the chain of buffers */
+static GstPadLinkReturn gst_v4lmjpegsink_sinkconnect (GstPad * pad,
+ const GstCaps * vscapslist);
+static void gst_v4lmjpegsink_chain (GstPad * pad, GstData * _data);
+
+/* get/set gst object functions */
+static void gst_v4lmjpegsink_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_v4lmjpegsink_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+static GstStateChangeReturn gst_v4lmjpegsink_change_state (GstElement *
+ element);
+static void gst_v4lmjpegsink_set_clock (GstElement * element, GstClock * clock);
+
+
+static GstElementClass *parent_class = NULL;
+static guint gst_v4lmjpegsink_signals[LAST_SIGNAL] = { 0 };
+
+
+GType
+gst_v4lmjpegsink_get_type (void)
+{
+ static GType v4lmjpegsink_type = 0;
+
+ if (!v4lmjpegsink_type) {
+ static const GTypeInfo v4lmjpegsink_info = {
+ sizeof (GstV4lMjpegSinkClass),
+ gst_v4lmjpegsink_base_init,
+ NULL,
+ (GClassInitFunc) gst_v4lmjpegsink_class_init,
+ NULL,
+ NULL,
+ sizeof (GstV4lMjpegSink),
+ 0,
+ (GInstanceInitFunc) gst_v4lmjpegsink_init,
+ };
+
+ v4lmjpegsink_type =
+ g_type_register_static (GST_TYPE_V4LELEMENT, "GstV4lMjpegSink",
+ &v4lmjpegsink_info, 0);
+ }
+ return v4lmjpegsink_type;
+}
+
+static void
+gst_v4lmjpegsink_base_init (gpointer g_class)
+{
+ static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("image/jpeg, "
+ "width = (int) [ 1, MAX ], "
+ "height = (int) [ 1, MAX ], " "framerate = (fraction) [ 0, MAX ]")
+ );
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details_simple (gstelement_class,
+ "Video (video4linux/MJPEG) sink", "Sink/Video",
+ "Writes MJPEG-encoded frames to a zoran MJPEG/video4linux device",
+ "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
+
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&sink_template));
+}
+
+static void
+gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUMBUFS,
+ g_param_spec_int ("num-buffers", "num-buffers", "num-buffers",
+ G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFSIZE,
+ g_param_spec_int ("buffer-size", "buffer-size", "buffer-size",
+ G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_X_OFFSET,
+ g_param_spec_int ("x-offset", "x-offset", "x-offset",
+ G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_Y_OFFSET,
+ g_param_spec_int ("y-offset", "y-offset", "y-offset",
+ G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FRAMES_DISPLAYED,
+ g_param_spec_int ("frames-displayed", "frames-displayed",
+ "frames-displayed", G_MININT, G_MAXINT, 0,
+ G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FRAME_TIME,
+ g_param_spec_int ("frame-time", "frame-time", "frame-time", G_MININT,
+ G_MAXINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+ GST_DEBUG_CATEGORY_INIT (v4lmjpegsink_debug, "v4lmjpegsink", 0,
+ "V4L MJPEG sink element");
+ gobject_class->set_property = gst_v4lmjpegsink_set_property;
+ gobject_class->get_property = gst_v4lmjpegsink_get_property;
+
+ gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED] =
+ g_signal_new ("frame-displayed", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstV4lMjpegSinkClass,
+ frame_displayed), NULL, NULL, g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ gstelement_class->change_state = gst_v4lmjpegsink_change_state;
+ gstelement_class->set_clock = gst_v4lmjpegsink_set_clock;
+}
+
+
+static void
+gst_v4lmjpegsink_init (GstV4lMjpegSink * v4lmjpegsink)
+{
+ GstElementClass *klass = GST_ELEMENT_GET_CLASS (v4lmjpegsink);
+
+ v4lmjpegsink->sinkpad =
+ gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
+ "sink"), "sink");
+ gst_element_add_pad (GST_ELEMENT (v4lmjpegsink), v4lmjpegsink->sinkpad);
+
+ gst_pad_set_chain_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_chain);
+ gst_pad_set_link_function (v4lmjpegsink->sinkpad,
+ gst_v4lmjpegsink_sinkconnect);
+
+ v4lmjpegsink->clock = NULL;
+
+ v4lmjpegsink->width = -1;
+ v4lmjpegsink->height = -1;
+
+ v4lmjpegsink->x_offset = -1;
+ v4lmjpegsink->y_offset = -1;
+
+ v4lmjpegsink->numbufs = 64;
+ v4lmjpegsink->bufsize = 256;
+
+ GST_OBJECT_FLAG_SET (v4lmjpegsink, GST_ELEMENT_THREAD_SUGGESTED);
+}
+
+
+static GstPadLinkReturn
+gst_v4lmjpegsink_sinkconnect (GstPad * pad, const GstCaps * vscapslist)
+{
+ GstV4lMjpegSink *v4lmjpegsink;
+ GstStructure *structure;
+
+ v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
+
+ /* in case the buffers are active (which means that we already
+ * did capsnego before and didn't clean up), clean up anyways */
+ if (GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsink)))
+ if (!gst_v4lmjpegsink_playback_deinit (v4lmjpegsink))
+ return GST_PAD_LINK_REFUSED;
+
+ structure = gst_caps_get_structure (vscapslist, 0);
+
+ gst_structure_get_int (structure, "width", &v4lmjpegsink->width);
+ gst_structure_get_int (structure, "height", &v4lmjpegsink->height);
+
+ if (!gst_v4lmjpegsink_set_playback (v4lmjpegsink, v4lmjpegsink->width, v4lmjpegsink->height, v4lmjpegsink->x_offset, v4lmjpegsink->y_offset, GST_V4LELEMENT (v4lmjpegsink)->vchan.norm, 0)) /* TODO: interlacing */
+ return GST_PAD_LINK_REFUSED;
+
+ /* set buffer info */
+ if (!gst_v4lmjpegsink_set_buffer (v4lmjpegsink,
+ v4lmjpegsink->numbufs, v4lmjpegsink->bufsize))
+ return GST_PAD_LINK_REFUSED;
+ if (!gst_v4lmjpegsink_playback_init (v4lmjpegsink))
+ return GST_PAD_LINK_REFUSED;
+
+ return GST_PAD_LINK_OK;
+
+}
+
+
+static void
+gst_v4lmjpegsink_set_clock (GstElement * element, GstClock * clock)
+{
+ GstV4lMjpegSink *v4mjpegsink = GST_V4LMJPEGSINK (element);
+
+ v4mjpegsink->clock = clock;
+}
+
+
+static void
+gst_v4lmjpegsink_chain (GstPad * pad, GstData * _data)
+{
+ GstBuffer *buf = GST_BUFFER (_data);
+ GstV4lMjpegSink *v4lmjpegsink;
+ gint num;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+
+ v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
+
+ if (v4lmjpegsink->clock) {
+ GST_DEBUG ("videosink: clock wait: %" G_GUINT64_FORMAT,
+ GST_BUFFER_TIMESTAMP (buf));
+
+ gst_element_wait (GST_ELEMENT (v4lmjpegsink), GST_BUFFER_TIMESTAMP (buf));
+ }
+#if 0
+ if (GST_BUFFER_POOL (buf) == v4lmjpegsink->bufferpool) {
+ num = GPOINTER_TO_INT (GST_BUFFER_POOL_PRIVATE (buf));
+ gst_v4lmjpegsink_play_frame (v4lmjpegsink, num);
+ } else {
+#endif
+ /* check size */
+ if (GST_BUFFER_SIZE (buf) > v4lmjpegsink->breq.size) {
+ GST_ELEMENT_ERROR (v4lmjpegsink, RESOURCE, WRITE, (NULL),
+ ("Buffer too big (%d KB), max. buffersize is %ld KB",
+ GST_BUFFER_SIZE (buf) / 1024, v4lmjpegsink->breq.size / 1024));
+ return;
+ }
+
+ /* put JPEG data to the device */
+ gst_v4lmjpegsink_wait_frame (v4lmjpegsink, &num);
+ memcpy (gst_v4lmjpegsink_get_buffer (v4lmjpegsink, num),
+ GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
+ gst_v4lmjpegsink_play_frame (v4lmjpegsink, num);
+#if 0
+ }
+#endif
+
+ g_signal_emit (G_OBJECT (v4lmjpegsink),
+ gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED], 0);
+
+ gst_buffer_unref (buf);
+}
+
+
+#if 0
+static GstBuffer *
+gst_v4lmjpegsink_buffer_new (GstBufferPool * pool,
+ guint64 offset, guint size, gpointer user_data)
+{
+ GstV4lMjpegSink *v4lmjpegsink = GST_V4LMJPEGSINK (user_data);
+ GstBuffer *buffer = NULL;
+ guint8 *data;
+ gint num;
+
+ if (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsink)))
+ return NULL;
+ if (v4lmjpegsink->breq.size < size) {
+ GST_DEBUG ("Requested buffer size is too large (%d > %ld)",
+ size, v4lmjpegsink->breq.size);
+ return NULL;
+ }
+ if (!gst_v4lmjpegsink_wait_frame (v4lmjpegsink, &num))
+ return NULL;
+ data = gst_v4lmjpegsink_get_buffer (v4lmjpegsink, num);
+ if (!data)
+ return NULL;
+ buffer = gst_buffer_new ();
+ GST_BUFFER_DATA (buffer) = data;
+ GST_BUFFER_MAXSIZE (buffer) = v4lmjpegsink->breq.size;
+ GST_BUFFER_SIZE (buffer) = size;
+ GST_BUFFER_POOL (buffer) = pool;
+ GST_BUFFER_POOL_PRIVATE (buffer) = GINT_TO_POINTER (num);
+
+ /* with this flag set, we don't need our own buffer_free() function */
+ GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_DONTFREE);
+
+ return buffer;
+}
+#endif
+
+
+static void
+gst_v4lmjpegsink_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstV4lMjpegSink *v4lmjpegsink;
+
+ g_return_if_fail (GST_IS_V4LMJPEGSINK (object));
+
+ v4lmjpegsink = GST_V4LMJPEGSINK (object);
+
+ switch (prop_id) {
+ case ARG_NUMBUFS:
+ v4lmjpegsink->numbufs = g_value_get_int (value);
+ break;
+ case ARG_BUFSIZE:
+ v4lmjpegsink->bufsize = g_value_get_int (value);
+ break;
+ case ARG_X_OFFSET:
+ v4lmjpegsink->x_offset = g_value_get_int (value);
+ break;
+ case ARG_Y_OFFSET:
+ v4lmjpegsink->y_offset = g_value_get_int (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static void
+gst_v4lmjpegsink_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstV4lMjpegSink *v4lmjpegsink;
+
+ v4lmjpegsink = GST_V4LMJPEGSINK (object);
+
+ switch (prop_id) {
+ case ARG_FRAMES_DISPLAYED:
+ g_value_set_int (value, v4lmjpegsink->frames_displayed);
+ break;
+ case ARG_FRAME_TIME:
+ g_value_set_int (value, v4lmjpegsink->frame_time / 1000000);
+ break;
+ case ARG_NUMBUFS:
+ g_value_set_int (value, v4lmjpegsink->numbufs);
+ break;
+ case ARG_BUFSIZE:
+ g_value_set_int (value, v4lmjpegsink->bufsize);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static GstStateChangeReturn
+gst_v4lmjpegsink_change_state (GstElement * element, GstStateChange transition)
+{
+ GstV4lMjpegSink *v4lmjpegsink;
+ GstStateChangeReturn parent_value;
+
+ g_return_val_if_fail (GST_IS_V4LMJPEGSINK (element),
+ GST_STATE_CHANGE_FAILURE);
+ v4lmjpegsink = GST_V4LMJPEGSINK (element);
+
+ /* set up change state */
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ /* we used to do buffer setup here, but that's now done
+ * right after capsnego */
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+ /* start */
+ if (!gst_v4lmjpegsink_playback_start (v4lmjpegsink))
+ return GST_STATE_CHANGE_FAILURE;
+ break;
+ case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+ /* de-queue all queued buffers */
+ if (!gst_v4lmjpegsink_playback_stop (v4lmjpegsink))
+ return GST_STATE_CHANGE_FAILURE;
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ /* stop playback, unmap all buffers */
+ if (!gst_v4lmjpegsink_playback_deinit (v4lmjpegsink))
+ return GST_STATE_CHANGE_FAILURE;
+ break;
+ }
+
+ if (GST_ELEMENT_CLASS (parent_class)->change_state) {
+ parent_value =
+ GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+ } else {
+ parent_value = GST_STATE_CHANGE_FAILURE;
+ }
+
+ if (GST_ELEMENT_CLASS (parent_class)->change_state)
+ return parent_value;
+
+ return GST_STATE_CHANGE_SUCCESS;
+}
projects / mafwsubrenderer / blobdiff