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gstreamer/sys/v4l/gstv4lmjpegsink.c
Wim Taymans 5455dbbf3d Bring the plugins in sync with the new core capsnego system. 
Original commit message from CVS:
Bring the plugins in sync with the new core capsnego system.
Added some features, enhancements...
2002-01-13 22:27:25 +00:00

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/* G-Streamer hardware MJPEG video sink plugin
* Copyright (C) 2001 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.
*/
#include <string.h>
#include "v4lmjpegsink_calls.h"
static GstElementDetails gst_v4lmjpegsink_details = {
"Video (video4linux/MJPEG) sink",
"Sink/Video",
"Writes MJPEG-encoded frames to a zoran MJPEG/video4linux device",
VERSION,
"Ronald Bultje <rbultje@ronald.bitfreak.net>",
"(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,
};
GST_PADTEMPLATE_FACTORY (sink_template,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"v4lmjpegsink_caps",
"video/jpeg",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT)
)
)
/* init functions */
static void gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass *klass);
static void gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink);
/* the chain of buffers */
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 void gst_v4lmjpegsink_close (GstV4lMjpegSink *v4lmjpegsink);
static GstElementStateReturn gst_v4lmjpegsink_change_state (GstElement *element);
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;
}
static GstPadConnectReturn
gst_v4lmjpegsink_sinkconnect (GstPad *pad,
GstCaps *caps)
{
GstV4lMjpegSink *v4lmjpegsink;
v4lmjpegsink = GST_V4LMJPEGSINK (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_CONNECT_DELAYED;
v4lmjpegsink->width = gst_caps_get_int (caps, "width");
v4lmjpegsink->height = gst_caps_get_int (caps, "height");
gst_v4lmjpegsink_set_playback(v4lmjpegsink,
v4lmjpegsink->width, v4lmjpegsink->height,
v4lmjpegsink->x_offset, v4lmjpegsink->y_offset,
GST_V4LELEMENT(v4lmjpegsink)->norm, 0); /* TODO: interlacing */
g_signal_emit (G_OBJECT (v4lmjpegsink), gst_v4lmjpegsink_signals[SIGNAL_HAVE_SIZE], 0,
v4lmjpegsink->width, v4lmjpegsink->height);
return GST_PAD_CONNECT_OK;
}
static void
gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink)
{
v4lmjpegsink->sinkpad = gst_pad_new_from_template(GST_PADTEMPLATE_GET (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_connect_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_sinkconnect);
v4lmjpegsink->clock = gst_clock_get_system();
gst_clock_register(v4lmjpegsink->clock, GST_OBJECT(v4lmjpegsink));
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);
}
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));
GST_DEBUG (0,"videosink: clock wait: %llu\n", GST_BUFFER_TIMESTAMP(buf));
jitter = gst_clock_current_diff(v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP (buf));
if (jitter > 500000 || jitter < -500000)
{
GST_DEBUG (0, "jitter: %lld\n", jitter);
gst_clock_set (v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP (buf));
}
else {
gst_clock_wait(v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP(buf), GST_OBJECT(v4lmjpegsink));
}
/* 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 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:
/*parent_class->set_property(object, prop_id, value, 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:
/*parent_class->get_property(object, prop_id, value, 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:
/* set buffer info */
if (!gst_v4lmjpegsink_set_buffer(v4lmjpegsink,
v4lmjpegsink->numbufs, v4lmjpegsink->bufsize))
return GST_STATE_FAILURE;
if (!gst_v4lmjpegsink_playback_init(v4lmjpegsink))
return GST_STATE_FAILURE;
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);
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;
/* create an elementfactory for the v4lmjpegsink element */
factory = gst_elementfactory_new("v4lmjpegsink",GST_TYPE_V4LMJPEGSINK,
&gst_v4lmjpegsink_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory,
GST_PADTEMPLATE_GET (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
};
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