/* G-Streamer hardware MJPEG video sink plugin * Copyright (C) 2001-2002 Ronald Bultje * * 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. */ #include #include "v4lmjpegsink_calls.h" /* elementfactory information */ static GstElementDetails gst_v4lmjpegsink_details = { "Video (video4linux/MJPEG) sink", "Sink/Video", "LGPL", "Writes MJPEG-encoded frames to a zoran MJPEG/video4linux device", VERSION, "Ronald Bultje ", "(C) 2001", }; /* v4lmjpegsink signals and args */ enum { SIGNAL_FRAME_DISPLAYED, SIGNAL_HAVE_SIZE, 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_class_init (GstV4lMjpegSinkClass *klass); static void gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink); /* the chain of buffers */ static GstPadLinkReturn gst_v4lmjpegsink_sinkconnect (GstPad *pad, GstCaps *vscapslist); static void gst_v4lmjpegsink_chain (GstPad *pad, GstBuffer *buf); /* 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 GstElementStateReturn gst_v4lmjpegsink_change_state (GstElement *element); static void gst_v4lmjpegsink_set_clock (GstElement *element, GstClock *clock); /* bufferpool functions */ static GstBuffer* gst_v4lmjpegsink_buffer_new (GstBufferPool *pool, guint64 offset, guint size, gpointer user_data); static GstCaps *capslist = NULL; static GstPadTemplate *sink_template; 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), NULL, 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_class_init (GstV4lMjpegSinkClass *klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass*)klass; gstelement_class = (GstElementClass*)klass; parent_class = g_type_class_ref (GST_TYPE_V4LELEMENT); 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_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_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_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_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_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)); 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); gst_v4lmjpegsink_signals[SIGNAL_HAVE_SIZE] = g_signal_new ("have_size", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstV4lMjpegSinkClass, have_size), NULL, NULL, gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_UINT); gstelement_class->change_state = gst_v4lmjpegsink_change_state; gstelement_class->set_clock = gst_v4lmjpegsink_set_clock; } static void gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink) { v4lmjpegsink->sinkpad = gst_pad_new_from_template (sink_template, "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_FLAG_SET(v4lmjpegsink, GST_ELEMENT_THREAD_SUGGESTED); v4lmjpegsink->bufferpool = gst_buffer_pool_new( NULL, NULL, (GstBufferPoolBufferNewFunction)gst_v4lmjpegsink_buffer_new, NULL, NULL, v4lmjpegsink); } static GstPadLinkReturn gst_v4lmjpegsink_sinkconnect (GstPad *pad, GstCaps *vscapslist) { GstV4lMjpegSink *v4lmjpegsink; GstCaps *caps; v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad)); /* we are not going to act on variable caps */ if (!GST_CAPS_IS_FIXED (vscapslist) || !GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsink))) return GST_PAD_LINK_DELAYED; /* 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; for (caps = vscapslist; caps != NULL; caps = vscapslist = vscapslist->next) { gst_caps_get_int (caps, "width", &v4lmjpegsink->width); gst_caps_get_int (caps, "height", &v4lmjpegsink->height); if (!gst_v4lmjpegsink_set_playback(v4lmjpegsink, v4lmjpegsink->width, v4lmjpegsink->height, v4lmjpegsink->x_offset, v4lmjpegsink->y_offset, GST_V4LELEMENT(v4lmjpegsink)->norm, 0)) /* TODO: interlacing */ continue; /* set buffer info */ if (!gst_v4lmjpegsink_set_buffer(v4lmjpegsink, v4lmjpegsink->numbufs, v4lmjpegsink->bufsize)) continue; if (!gst_v4lmjpegsink_playback_init(v4lmjpegsink)) continue; g_signal_emit (G_OBJECT (v4lmjpegsink), gst_v4lmjpegsink_signals[SIGNAL_HAVE_SIZE], 0, v4lmjpegsink->width, v4lmjpegsink->height); return GST_PAD_LINK_OK; } /* if we got here - it's not good */ return GST_PAD_LINK_REFUSED; } 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, GstBuffer *buf) { GstV4lMjpegSink *v4lmjpegsink; GstClockTimeDiff jitter; 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) { GstClockID id; GST_DEBUG (0,"videosink: clock wait: %" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP(buf)); jitter = 0; /* FIXME: jitter = gst_clock_current_diff(v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP (buf)); */ if (jitter > 500000 || jitter < -500000) GST_DEBUG (0, "jitter: %" G_GINT64_FORMAT, jitter); id = gst_clock_new_single_shot_id (v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP(buf)); gst_element_clock_wait(GST_ELEMENT(v4lmjpegsink), id, NULL); gst_clock_id_free (id); } if (GST_BUFFER_POOL(buf) == v4lmjpegsink->bufferpool) { num = GPOINTER_TO_INT(GST_BUFFER_POOL_PRIVATE(buf)); gst_v4lmjpegsink_play_frame(v4lmjpegsink, num); } else { /* check size */ if (GST_BUFFER_SIZE(buf) > v4lmjpegsink->breq.size) { gst_element_error(GST_ELEMENT(v4lmjpegsink), "Buffer too big (%d KB), max. buffersize is %d 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); } g_signal_emit(G_OBJECT(v4lmjpegsink),gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED],0); gst_buffer_unref(buf); } 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(GST_CAT_PLUGIN_INFO, "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; } static void gst_v4lmjpegsink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstV4lMjpegSink *v4lmjpegsink; /* it's not null if we got it, but it might not be ours */ 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; /* it's not null if we got it, but it might not be ours */ 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 GstElementStateReturn gst_v4lmjpegsink_change_state (GstElement *element) { GstV4lMjpegSink *v4lmjpegsink; GstElementStateReturn parent_value; g_return_val_if_fail (GST_IS_V4LMJPEGSINK (element), GST_STATE_FAILURE); v4lmjpegsink = GST_V4LMJPEGSINK(element); /* set up change state */ switch (GST_STATE_TRANSITION(element)) { case GST_STATE_READY_TO_PAUSED: /* we used to do buffer setup here, but that's now done * right after capsnego */ break; case GST_STATE_PAUSED_TO_PLAYING: /* start */ if (!gst_v4lmjpegsink_playback_start(v4lmjpegsink)) return GST_STATE_FAILURE; break; case GST_STATE_PLAYING_TO_PAUSED: /* de-queue all queued buffers */ if (!gst_v4lmjpegsink_playback_stop(v4lmjpegsink)) return GST_STATE_FAILURE; break; case GST_STATE_PAUSED_TO_READY: /* stop playback, unmap all buffers */ if (!gst_v4lmjpegsink_playback_deinit(v4lmjpegsink)) return GST_STATE_FAILURE; break; } if (GST_ELEMENT_CLASS (parent_class)->change_state) { parent_value = GST_ELEMENT_CLASS (parent_class)->change_state (element); } else { parent_value = GST_STATE_FAILURE; } if (GST_STATE_TRANSITION(element) == GST_STATE_NULL_TO_READY) { if ((GST_V4LELEMENT(v4lmjpegsink)->norm >= VIDEO_MODE_PAL || GST_V4LELEMENT(v4lmjpegsink)->norm < VIDEO_MODE_AUTO) || GST_V4LELEMENT(v4lmjpegsink)->channel < 0) if (!gst_v4l_set_chan_norm(GST_V4LELEMENT(v4lmjpegsink), 0, GST_V4LELEMENT(v4lmjpegsink)->norm)) return GST_STATE_FAILURE; } if (GST_ELEMENT_CLASS (parent_class)->change_state) return parent_value; return GST_STATE_SUCCESS; } static gboolean plugin_init (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; GstCaps *caps; /* create an elementfactory for the v4lmjpegsink element */ factory = gst_element_factory_new("v4lmjpegsink",GST_TYPE_V4LMJPEGSINK, &gst_v4lmjpegsink_details); g_return_val_if_fail(factory != NULL, FALSE); caps = gst_caps_new ("v4lmjpegsink_caps", "video/jpeg", gst_props_new ( "width", GST_PROPS_INT_RANGE (0, G_MAXINT), "height", GST_PROPS_INT_RANGE (0, G_MAXINT), NULL ) ); capslist = gst_caps_append(capslist, caps); sink_template = gst_pad_template_new ( "sink", GST_PAD_SINK, GST_PAD_ALWAYS, capslist, NULL); gst_element_factory_add_pad_template (factory, sink_template); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; } GstPluginDesc plugin_desc = { GST_VERSION_MAJOR, GST_VERSION_MINOR, "v4lmjpegsink", plugin_init };