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439 lines
14 KiB
C
439 lines
14 KiB
C
/* G-Streamer hardware MJPEG video sink plugin
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 <string.h>
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#include "v4lmjpegsink_calls.h"
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/* elementfactory information */
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static GstElementDetails gst_v4lmjpegsink_details = {
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"Video (video4linux/MJPEG) sink",
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"Sink/Video",
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"Writes MJPEG-encoded frames to a zoran MJPEG/video4linux device",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>"
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};
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/* v4lmjpegsink signals and args */
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enum {
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SIGNAL_FRAME_DISPLAYED,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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ARG_NUMBUFS,
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ARG_BUFSIZE,
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ARG_X_OFFSET,
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ARG_Y_OFFSET,
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ARG_FRAMES_DISPLAYED,
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ARG_FRAME_TIME,
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};
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/* init functions */
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static void gst_v4lmjpegsink_base_init (gpointer g_class);
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static void gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass *klass);
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static void gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink);
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/* the chain of buffers */
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static GstPadLinkReturn gst_v4lmjpegsink_sinkconnect (GstPad *pad,
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const GstCaps *vscapslist);
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static void gst_v4lmjpegsink_chain (GstPad *pad,
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GstData *_data);
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/* get/set gst object functions */
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static void gst_v4lmjpegsink_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gst_v4lmjpegsink_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static GstElementStateReturn gst_v4lmjpegsink_change_state (GstElement *element);
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static void gst_v4lmjpegsink_set_clock (GstElement *element, GstClock *clock);
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static GstElementClass *parent_class = NULL;
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static guint gst_v4lmjpegsink_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_v4lmjpegsink_get_type (void)
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{
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static GType v4lmjpegsink_type = 0;
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if (!v4lmjpegsink_type) {
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static const GTypeInfo v4lmjpegsink_info = {
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sizeof(GstV4lMjpegSinkClass),
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gst_v4lmjpegsink_base_init,
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NULL,
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(GClassInitFunc)gst_v4lmjpegsink_class_init,
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NULL,
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NULL,
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sizeof(GstV4lMjpegSink),
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0,
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(GInstanceInitFunc)gst_v4lmjpegsink_init,
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};
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v4lmjpegsink_type = g_type_register_static(GST_TYPE_V4LELEMENT, "GstV4lMjpegSink", &v4lmjpegsink_info, 0);
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}
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return v4lmjpegsink_type;
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}
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static void
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gst_v4lmjpegsink_base_init (gpointer g_class)
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{
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE (
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-jpeg, "
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"width = (int) [ 1, MAX ], "
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"height = (int) [ 1, MAX ], "
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"framerate = (double) [ 0, MAX ]")
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);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details (gstelement_class, &gst_v4lmjpegsink_details);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get(&sink_template));
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}
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static void
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gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass *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_ref (GST_TYPE_V4LELEMENT);
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NUMBUFS,
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g_param_spec_int("num_buffers","num_buffers","num_buffers",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BUFSIZE,
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g_param_spec_int("buffer_size","buffer_size","buffer_size",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_X_OFFSET,
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g_param_spec_int("x_offset","x_offset","x_offset",
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G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_Y_OFFSET,
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g_param_spec_int("y_offset","y_offset","y_offset",
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G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAMES_DISPLAYED,
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g_param_spec_int("frames_displayed","frames_displayed","frames_displayed",
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G_MININT,G_MAXINT,0,G_PARAM_READABLE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAME_TIME,
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g_param_spec_int("frame_time","frame_time","frame_time",
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G_MININT,G_MAXINT,0,G_PARAM_READABLE));
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gobject_class->set_property = gst_v4lmjpegsink_set_property;
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gobject_class->get_property = gst_v4lmjpegsink_get_property;
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gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED] =
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g_signal_new ("frame_displayed", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstV4lMjpegSinkClass, frame_displayed), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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gstelement_class->change_state = gst_v4lmjpegsink_change_state;
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gstelement_class->set_clock = gst_v4lmjpegsink_set_clock;
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}
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static void
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gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (v4lmjpegsink);
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v4lmjpegsink->sinkpad = gst_pad_new_from_template (
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gst_element_class_get_pad_template (klass, "sink"), "sink");
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gst_element_add_pad (GST_ELEMENT (v4lmjpegsink), v4lmjpegsink->sinkpad);
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gst_pad_set_chain_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_chain);
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gst_pad_set_link_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_sinkconnect);
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v4lmjpegsink->clock = NULL;
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v4lmjpegsink->width = -1;
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v4lmjpegsink->height = -1;
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v4lmjpegsink->x_offset = -1;
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v4lmjpegsink->y_offset = -1;
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v4lmjpegsink->numbufs = 64;
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v4lmjpegsink->bufsize = 256;
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GST_FLAG_SET(v4lmjpegsink, GST_ELEMENT_THREAD_SUGGESTED);
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}
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static GstPadLinkReturn
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gst_v4lmjpegsink_sinkconnect (GstPad *pad,
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const GstCaps *vscapslist)
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{
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GstV4lMjpegSink *v4lmjpegsink;
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GstStructure *structure;
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v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
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/* in case the buffers are active (which means that we already
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* did capsnego before and didn't clean up), clean up anyways */
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if (GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsink)))
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if (!gst_v4lmjpegsink_playback_deinit(v4lmjpegsink))
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return GST_PAD_LINK_REFUSED;
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structure = gst_caps_get_structure (vscapslist, 0);
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gst_structure_get_int (structure, "width", &v4lmjpegsink->width);
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gst_structure_get_int (structure, "height", &v4lmjpegsink->height);
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if (!gst_v4lmjpegsink_set_playback(v4lmjpegsink,
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v4lmjpegsink->width, v4lmjpegsink->height,
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v4lmjpegsink->x_offset, v4lmjpegsink->y_offset,
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GST_V4LELEMENT(v4lmjpegsink)->vchan.norm, 0)) /* TODO: interlacing */
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return GST_PAD_LINK_REFUSED;
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/* set buffer info */
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if (!gst_v4lmjpegsink_set_buffer(v4lmjpegsink,
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v4lmjpegsink->numbufs, v4lmjpegsink->bufsize))
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return GST_PAD_LINK_REFUSED;
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if (!gst_v4lmjpegsink_playback_init(v4lmjpegsink))
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return GST_PAD_LINK_REFUSED;
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return GST_PAD_LINK_OK;
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}
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static void
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gst_v4lmjpegsink_set_clock (GstElement *element, GstClock *clock)
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{
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GstV4lMjpegSink *v4mjpegsink = GST_V4LMJPEGSINK (element);
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v4mjpegsink->clock = clock;
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}
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static void
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gst_v4lmjpegsink_chain (GstPad *pad,
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GstData *_data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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GstV4lMjpegSink *v4lmjpegsink;
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gint num;
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g_return_if_fail (pad != NULL);
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g_return_if_fail (GST_IS_PAD (pad));
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g_return_if_fail (buf != NULL);
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v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
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if (v4lmjpegsink->clock) {
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GST_DEBUG ("videosink: clock wait: %" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP(buf));
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gst_element_wait (GST_ELEMENT(v4lmjpegsink), GST_BUFFER_TIMESTAMP(buf));
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}
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#if 0
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if (GST_BUFFER_POOL(buf) == v4lmjpegsink->bufferpool)
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{
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num = GPOINTER_TO_INT(GST_BUFFER_POOL_PRIVATE(buf));
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gst_v4lmjpegsink_play_frame(v4lmjpegsink, num);
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}
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else
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{
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#endif
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/* check size */
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if (GST_BUFFER_SIZE(buf) > v4lmjpegsink->breq.size)
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{
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gst_element_error (v4lmjpegsink, RESOURCE, WRITE, NULL,
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("Buffer too big (%d KB), max. buffersize is %ld KB",
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GST_BUFFER_SIZE(buf)/1024, v4lmjpegsink->breq.size/1024));
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return;
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}
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/* put JPEG data to the device */
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gst_v4lmjpegsink_wait_frame(v4lmjpegsink, &num);
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memcpy(gst_v4lmjpegsink_get_buffer(v4lmjpegsink, num),
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GST_BUFFER_DATA(buf), GST_BUFFER_SIZE(buf));
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gst_v4lmjpegsink_play_frame(v4lmjpegsink, num);
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#if 0
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}
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#endif
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g_signal_emit(G_OBJECT(v4lmjpegsink),gst_v4lmjpegsink_signals[SIGNAL_FRAME_DISPLAYED],0);
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gst_buffer_unref(buf);
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}
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#if 0
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static GstBuffer *
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gst_v4lmjpegsink_buffer_new (GstBufferPool *pool,
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guint64 offset,
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guint size,
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gpointer user_data)
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{
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GstV4lMjpegSink *v4lmjpegsink = GST_V4LMJPEGSINK(user_data);
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GstBuffer *buffer = NULL;
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guint8 *data;
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gint num;
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if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsink)))
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return NULL;
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if (v4lmjpegsink->breq.size < size) {
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GST_DEBUG ("Requested buffer size is too large (%d > %ld)",
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size, v4lmjpegsink->breq.size);
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return NULL;
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}
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if (!gst_v4lmjpegsink_wait_frame(v4lmjpegsink, &num))
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return NULL;
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data = gst_v4lmjpegsink_get_buffer(v4lmjpegsink, num);
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if (!data)
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return NULL;
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buffer = gst_buffer_new();
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GST_BUFFER_DATA(buffer) = data;
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GST_BUFFER_MAXSIZE(buffer) = v4lmjpegsink->breq.size;
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GST_BUFFER_SIZE(buffer) = size;
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GST_BUFFER_POOL(buffer) = pool;
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GST_BUFFER_POOL_PRIVATE(buffer) = GINT_TO_POINTER(num);
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/* with this flag set, we don't need our own buffer_free() function */
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GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_DONTFREE);
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return buffer;
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}
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#endif
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static void
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gst_v4lmjpegsink_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GstV4lMjpegSink *v4lmjpegsink;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_V4LMJPEGSINK (object));
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v4lmjpegsink = GST_V4LMJPEGSINK (object);
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switch (prop_id)
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{
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case ARG_NUMBUFS:
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v4lmjpegsink->numbufs = g_value_get_int(value);
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break;
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case ARG_BUFSIZE:
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v4lmjpegsink->bufsize = g_value_get_int(value);
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break;
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case ARG_X_OFFSET:
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v4lmjpegsink->x_offset = g_value_get_int(value);
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break;
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case ARG_Y_OFFSET:
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v4lmjpegsink->y_offset = g_value_get_int(value);
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break;
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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 void
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gst_v4lmjpegsink_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GstV4lMjpegSink *v4lmjpegsink;
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/* it's not null if we got it, but it might not be ours */
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v4lmjpegsink = GST_V4LMJPEGSINK(object);
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switch (prop_id) {
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case ARG_FRAMES_DISPLAYED:
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g_value_set_int (value, v4lmjpegsink->frames_displayed);
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break;
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case ARG_FRAME_TIME:
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g_value_set_int (value, v4lmjpegsink->frame_time/1000000);
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break;
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case ARG_NUMBUFS:
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g_value_set_int (value, v4lmjpegsink->numbufs);
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break;
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case ARG_BUFSIZE:
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g_value_set_int (value, v4lmjpegsink->bufsize);
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break;
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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 GstElementStateReturn
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gst_v4lmjpegsink_change_state (GstElement *element)
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{
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GstV4lMjpegSink *v4lmjpegsink;
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GstElementStateReturn parent_value;
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g_return_val_if_fail (GST_IS_V4LMJPEGSINK (element), GST_STATE_FAILURE);
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v4lmjpegsink = GST_V4LMJPEGSINK(element);
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/* set up change state */
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switch (GST_STATE_TRANSITION(element)) {
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case GST_STATE_READY_TO_PAUSED:
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/* we used to do buffer setup here, but that's now done
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* right after capsnego */
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break;
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case GST_STATE_PAUSED_TO_PLAYING:
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/* start */
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if (!gst_v4lmjpegsink_playback_start(v4lmjpegsink))
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return GST_STATE_FAILURE;
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break;
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case GST_STATE_PLAYING_TO_PAUSED:
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/* de-queue all queued buffers */
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if (!gst_v4lmjpegsink_playback_stop(v4lmjpegsink))
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return GST_STATE_FAILURE;
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break;
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case GST_STATE_PAUSED_TO_READY:
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/* stop playback, unmap all buffers */
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if (!gst_v4lmjpegsink_playback_deinit(v4lmjpegsink))
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return GST_STATE_FAILURE;
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break;
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state) {
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parent_value = GST_ELEMENT_CLASS (parent_class)->change_state (element);
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} else {
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parent_value = GST_STATE_FAILURE;
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return parent_value;
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return GST_STATE_SUCCESS;
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}
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