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gstreamer/sys/v4l/gstv4lmjpegsink.c
Ronald S. Bultje 9c1e52ad11 This patch: 1) would provide v4l2 plugins, if only the CVS server wouldn't bork on all commits :-(. This patch will c... 
Original commit message from CVS:
This patch:
1) would provide v4l2 plugins, if only the CVS server wouldn't bork on all commits :-(. This patch will come later on in a separate commit when SF fixes her repository.
2) it fixes capsnego for all the video4linux1 plugins
3) it rewrites the debugging of all v4l1 plugins, which now make use of the standard gstreamer debugging features (gst-mask=...). This should make debugging video4linux1/gstreamer problems much easier then it used to be.

VS: ----------------------------------------------------------------------
2002-09-09 07:12:29 +00:00

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/* G-Streamer 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.
*/
#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,
};
/* init functions */
static void gst_v4lmjpegsink_class_init (GstV4lMjpegSinkClass *klass);
static void gst_v4lmjpegsink_init (GstV4lMjpegSink *v4lmjpegsink);
/* the chain of buffers */
static GstPadConnectReturn 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);
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;
}
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_connect_function (v4lmjpegsink->sinkpad, gst_v4lmjpegsink_sinkconnect);
v4lmjpegsink->clock = NULL;
GST_ELEMENT (v4lmjpegsink)->setclockfunc = gst_v4lmjpegsink_set_clock;
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 GstPadConnectReturn
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_CONNECT_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_CONNECT_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_CONNECT_OK;
}
/* if we got here - it's not good */
return GST_PAD_CONNECT_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) {
GST_DEBUG (0,"videosink: clock wait: %llu", 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: %lld", jitter);
gst_element_clock_wait(GST_ELEMENT(v4lmjpegsink), v4lmjpegsink->clock, GST_BUFFER_TIMESTAMP(buf), NULL);
}
/* 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:
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
};
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