mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-20 00:31:13 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/sys/v4l/gstv4lmjpegsrc.c
Ronald S. Bultje 20538dadc9 This patch fixes some issues caused by design issues in video4linux, adds some nicety to video4linux2 plugins and doe... 
Original commit message from CVS:
This patch fixes some issues caused by design issues in video4linux, adds
some nicety to video4linux2 plugins and does some more evil stuff:
* video4linux doesn't tell us which formats are supported by a card, so
the only way to know this is by simply trying it out. This patch adds that.
* v4lmjpegsink didnt have a bufferpool yet - is integrated now.
* all copy() bufferpool functions have been removed since they're not needed.
* v4lmjpegsink doesnt have a free() function, because hen playing the frames,
all this is already handled. When the frame is not played, nothing has to
be done. In total, the function is not needed.
* adds a get_caps() function to v4l2src
* some minor crap
2002-09-20 09:28:46 +00:00

634 lines
20 KiB
C
Raw Blame History

/* G-Streamer hardware MJPEG video source 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 "v4lmjpegsrc_calls.h"
/* elementfactory information */
static GstElementDetails gst_v4lmjpegsrc_details = {
"Video (video4linux/MJPEG) Source",
"Source/Video",
"LGPL",
"Reads MJPEG-encoded frames from a zoran MJPEG/video4linux device",
VERSION,
"Ronald Bultje <rbultje@ronald.bitfreak.net>",
"(C) 2001",
};
/* V4lMjpegSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
/* arguments */
enum {
ARG_0,
ARG_X_OFFSET,
ARG_Y_OFFSET,
ARG_F_WIDTH,
ARG_F_HEIGHT,
ARG_H_DECIMATION,
ARG_V_DECIMATION,
ARG_WIDTH,
ARG_HEIGHT,
ARG_QUALITY,
ARG_NUMBUFS,
ARG_BUFSIZE
};
/* init functions */
static void gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass *klass);
static void gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc);
/* pad/buffer functions */
static gboolean gst_v4lmjpegsrc_srcconvert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value);
static GstPadConnectReturn gst_v4lmjpegsrc_srcconnect (GstPad *pad,
GstCaps *caps);
static GstBuffer* gst_v4lmjpegsrc_get (GstPad *pad);
/* get/set params */
static void gst_v4lmjpegsrc_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gst_v4lmjpegsrc_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
/* state handling */
static GstElementStateReturn gst_v4lmjpegsrc_change_state (GstElement *element);
/* bufferpool functions */
static GstBuffer* gst_v4lmjpegsrc_buffer_new (GstBufferPool *pool,
guint64 location,
guint size,
gpointer user_data);
static void gst_v4lmjpegsrc_buffer_free (GstBufferPool *pool,
GstBuffer *buf,
gpointer user_data);
static GstCaps *capslist = NULL;
static GstPadTemplate *src_template;
static GstElementClass *parent_class = NULL;
/*static guint gst_v4lmjpegsrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_v4lmjpegsrc_get_type (void)
{
static GType v4lmjpegsrc_type = 0;
if (!v4lmjpegsrc_type) {
static const GTypeInfo v4lmjpegsrc_info = {
sizeof(GstV4lMjpegSrcClass),
NULL,
NULL,
(GClassInitFunc)gst_v4lmjpegsrc_class_init,
NULL,
NULL,
sizeof(GstV4lMjpegSrc),
0,
(GInstanceInitFunc)gst_v4lmjpegsrc_init,
NULL
};
v4lmjpegsrc_type = g_type_register_static(GST_TYPE_V4LELEMENT, "GstV4lMjpegSrc", &v4lmjpegsrc_info, 0);
}
return v4lmjpegsrc_type;
}
static void
gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass *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_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_F_WIDTH,
g_param_spec_int("frame_width","frame_width","frame_width",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_F_HEIGHT,
g_param_spec_int("frame_height","frame_height","frame_height",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_H_DECIMATION,
g_param_spec_int("h_decimation","h_decimation","h_decimation",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_V_DECIMATION,
g_param_spec_int("v_decimation","v_decimation","v_decimation",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH,
g_param_spec_int("width","width","width",
G_MININT,G_MAXINT,0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
g_param_spec_int("height","height","height",
G_MININT,G_MAXINT,0,G_PARAM_READABLE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_QUALITY,
g_param_spec_int("quality","quality","quality",
G_MININT,G_MAXINT,0,G_PARAM_WRITABLE));
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));
gobject_class->set_property = gst_v4lmjpegsrc_set_property;
gobject_class->get_property = gst_v4lmjpegsrc_get_property;
gstelement_class->change_state = gst_v4lmjpegsrc_change_state;
}
static void
gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc)
{
v4lmjpegsrc->srcpad = gst_pad_new_from_template (src_template, "src");
gst_element_add_pad(GST_ELEMENT(v4lmjpegsrc), v4lmjpegsrc->srcpad);
gst_pad_set_get_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_get);
gst_pad_set_connect_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_srcconnect);
gst_pad_set_convert_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_srcconvert);
v4lmjpegsrc->bufferpool = gst_buffer_pool_new(
NULL,
NULL,
gst_v4lmjpegsrc_buffer_new,
NULL,
gst_v4lmjpegsrc_buffer_free,
v4lmjpegsrc);
v4lmjpegsrc->frame_width = 0;
v4lmjpegsrc->frame_height = 0;
v4lmjpegsrc->x_offset = -1;
v4lmjpegsrc->y_offset = -1;
v4lmjpegsrc->horizontal_decimation = 4;
v4lmjpegsrc->vertical_decimation = 4;
v4lmjpegsrc->end_width = 0;
v4lmjpegsrc->end_height = 0;
v4lmjpegsrc->quality = 50;
v4lmjpegsrc->numbufs = 64;
v4lmjpegsrc->bufsize = 256;
}
static gboolean
gst_v4lmjpegsrc_srcconvert (GstPad *pad,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value)
{
GstV4lMjpegSrc *v4lmjpegsrc;
gint norm;
gdouble fps;
v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
if (!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsrc)))
return FALSE;
if (!gst_v4l_get_chan_norm(GST_V4LELEMENT(v4lmjpegsrc), NULL, &norm))
return FALSE;
if (norm == VIDEO_MODE_NTSC)
fps = 30000/1001;
else
fps = 25.;
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_UNITS;
/* fall-through */
case GST_FORMAT_UNITS:
*dest_value = src_value * fps / GST_SECOND;
break;
default:
return FALSE;
}
break;
case GST_FORMAT_UNITS:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_format = GST_FORMAT_TIME;
/* fall-through */
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / fps;
break;
default:
return FALSE;
}
break;
default:
return FALSE;
}
return TRUE;
}
static GstPadConnectReturn
gst_v4lmjpegsrc_srcconnect (GstPad *pad,
GstCaps *caps)
{
GstPadConnectReturn ret_val;
GstV4lMjpegSrc *v4lmjpegsrc;
v4lmjpegsrc = GST_V4LMJPEGSRC (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(v4lmjpegsrc)))
{
if (!gst_v4lmjpegsrc_capture_deinit(v4lmjpegsrc))
return GST_PAD_CONNECT_REFUSED;
}
else if (!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lmjpegsrc)))
{
return GST_PAD_CONNECT_DELAYED;
}
/* Note: basically, we don't give a damn about the opposite caps here.
* that might seem odd, but it isn't. we know that the opposite caps is
* either NULL or has mime type video/jpeg, and in both cases, we'll set
* our own mime type back and it'll work. Other properties are to be set
* by the src, not by the opposite caps */
/* set buffer info */
if (!gst_v4lmjpegsrc_set_buffer(v4lmjpegsrc, v4lmjpegsrc->numbufs, v4lmjpegsrc->bufsize))
return GST_PAD_CONNECT_REFUSED;
/* set capture parameters and mmap the buffers */
if (!v4lmjpegsrc->frame_width && !v4lmjpegsrc->frame_height &&
v4lmjpegsrc->x_offset < 0 && v4lmjpegsrc->y_offset < 0 &&
v4lmjpegsrc->horizontal_decimation == v4lmjpegsrc->vertical_decimation)
{
if (!gst_v4lmjpegsrc_set_capture(v4lmjpegsrc,
v4lmjpegsrc->horizontal_decimation, v4lmjpegsrc->quality))
return GST_PAD_CONNECT_REFUSED;
}
else
{
if (!gst_v4lmjpegsrc_set_capture_m(v4lmjpegsrc,
v4lmjpegsrc->x_offset, v4lmjpegsrc->y_offset,
v4lmjpegsrc->frame_width, v4lmjpegsrc->frame_height,
v4lmjpegsrc->horizontal_decimation, v4lmjpegsrc->vertical_decimation,
v4lmjpegsrc->quality))
return GST_PAD_CONNECT_REFUSED;
}
/* we now have an actual width/height - *set it* */
caps = gst_caps_new("v4lmjpegsrc_caps",
"video/jpeg",
gst_props_new(
"width", GST_PROPS_INT(v4lmjpegsrc->end_width),
"height", GST_PROPS_INT(v4lmjpegsrc->end_height),
NULL ) );
if ((ret_val = gst_pad_try_set_caps(v4lmjpegsrc->srcpad, caps)) == GST_PAD_CONNECT_REFUSED)
return GST_PAD_CONNECT_REFUSED;
else if (ret_val == GST_PAD_CONNECT_DELAYED)
return GST_PAD_CONNECT_DELAYED;
if (!gst_v4lmjpegsrc_capture_init(v4lmjpegsrc))
return GST_PAD_CONNECT_REFUSED;
return GST_PAD_CONNECT_DONE;
}
static GstBuffer*
gst_v4lmjpegsrc_get (GstPad *pad)
{
GstV4lMjpegSrc *v4lmjpegsrc;
GstBuffer *buf;
gint num;
g_return_val_if_fail (pad != NULL, NULL);
v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
buf = gst_buffer_new_from_pool(v4lmjpegsrc->bufferpool, 0, 0);
if (!buf)
{
gst_element_error(GST_ELEMENT(v4lmjpegsrc),
"Failed to create a new GstBuffer");
return NULL;
}
/* grab a frame from the device */
if (!gst_v4lmjpegsrc_grab_frame(v4lmjpegsrc, &num, &(GST_BUFFER_SIZE(buf))))
return NULL;
GST_BUFFER_DATA(buf) = gst_v4lmjpegsrc_get_buffer(v4lmjpegsrc, num);
if (!v4lmjpegsrc->first_timestamp)
v4lmjpegsrc->first_timestamp = v4lmjpegsrc->bsync.timestamp.tv_sec * 1000000 +
v4lmjpegsrc->bsync.timestamp.tv_usec;
GST_BUFFER_TIMESTAMP(buf) = v4lmjpegsrc->bsync.timestamp.tv_sec * 1000000 +
v4lmjpegsrc->bsync.timestamp.tv_usec - v4lmjpegsrc->first_timestamp;
return buf;
}
static void
gst_v4lmjpegsrc_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GstV4lMjpegSrc *v4lmjpegsrc;
g_return_if_fail(GST_IS_V4LMJPEGSRC(object));
v4lmjpegsrc = GST_V4LMJPEGSRC(object);
switch (prop_id) {
case ARG_X_OFFSET:
v4lmjpegsrc->x_offset = g_value_get_int(value);
break;
case ARG_Y_OFFSET:
v4lmjpegsrc->y_offset = g_value_get_int(value);
break;
case ARG_F_WIDTH:
v4lmjpegsrc->frame_width = g_value_get_int(value);
break;
case ARG_F_HEIGHT:
v4lmjpegsrc->frame_height = g_value_get_int(value);
break;
case ARG_H_DECIMATION:
v4lmjpegsrc->horizontal_decimation = g_value_get_int(value);
break;
case ARG_V_DECIMATION:
v4lmjpegsrc->vertical_decimation = g_value_get_int(value);
break;
case ARG_QUALITY:
v4lmjpegsrc->quality = g_value_get_int(value);
break;
case ARG_NUMBUFS:
v4lmjpegsrc->numbufs = g_value_get_int(value);
break;
case ARG_BUFSIZE:
v4lmjpegsrc->bufsize = g_value_get_int(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_v4lmjpegsrc_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GstV4lMjpegSrc *v4lmjpegsrc;
g_return_if_fail(GST_IS_V4LMJPEGSRC(object));
v4lmjpegsrc = GST_V4LMJPEGSRC(object);
switch (prop_id) {
case ARG_WIDTH:
g_value_set_int(value, v4lmjpegsrc->end_width);
break;
case ARG_HEIGHT:
g_value_set_int(value, v4lmjpegsrc->end_height);
break;
case ARG_X_OFFSET:
g_value_set_int(value, v4lmjpegsrc->x_offset);
break;
case ARG_Y_OFFSET:
g_value_set_int(value, v4lmjpegsrc->y_offset);
break;
case ARG_F_WIDTH:
g_value_set_int(value, v4lmjpegsrc->frame_width);
break;
case ARG_F_HEIGHT:
g_value_set_int(value, v4lmjpegsrc->frame_height);
break;
case ARG_H_DECIMATION:
g_value_set_int(value, v4lmjpegsrc->horizontal_decimation);
break;
case ARG_V_DECIMATION:
g_value_set_int(value, v4lmjpegsrc->vertical_decimation);
break;
case ARG_QUALITY:
g_value_set_int(value, v4lmjpegsrc->quality);
break;
case ARG_NUMBUFS:
g_value_set_int(value, v4lmjpegsrc->breq.count);
break;
case ARG_BUFSIZE:
g_value_set_int(value, v4lmjpegsrc->breq.size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_v4lmjpegsrc_change_state (GstElement *element)
{
GstV4lMjpegSrc *v4lmjpegsrc;
GstElementStateReturn parent_value;
g_return_val_if_fail(GST_IS_V4LMJPEGSRC(element), GST_STATE_FAILURE);
v4lmjpegsrc = GST_V4LMJPEGSRC(element);
switch (GST_STATE_TRANSITION(element)) {
case GST_STATE_READY_TO_PAUSED:
/* actual buffer set-up used to be done here - but I moved
* it to capsnego itself */
v4lmjpegsrc->first_timestamp = 0;
break;
case GST_STATE_PAUSED_TO_PLAYING:
/* queue all buffer, start streaming capture */
if (!gst_v4lmjpegsrc_capture_start(v4lmjpegsrc))
return GST_STATE_FAILURE;
break;
case GST_STATE_PLAYING_TO_PAUSED:
/* de-queue all queued buffers */
if (!gst_v4lmjpegsrc_capture_stop(v4lmjpegsrc))
return GST_STATE_FAILURE;
break;
case GST_STATE_PAUSED_TO_READY:
/* stop capturing, unmap all buffers */
if (!gst_v4lmjpegsrc_capture_deinit(v4lmjpegsrc))
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)
{
/* do autodetection if no input/norm is selected yet */
if ((GST_V4LELEMENT(v4lmjpegsrc)->norm < VIDEO_MODE_PAL ||
GST_V4LELEMENT(v4lmjpegsrc)->norm == VIDEO_MODE_AUTO) ||
(GST_V4LELEMENT(v4lmjpegsrc)->channel < 0 ||
GST_V4LELEMENT(v4lmjpegsrc)->channel == V4L_MJPEG_INPUT_AUTO))
{
gint norm, input;
if (GST_V4LELEMENT(v4lmjpegsrc)->norm < 0)
norm = VIDEO_MODE_AUTO;
else
norm = GST_V4LELEMENT(v4lmjpegsrc)->norm;
if (GST_V4LELEMENT(v4lmjpegsrc)->channel < 0)
input = V4L_MJPEG_INPUT_AUTO;
else
input = GST_V4LELEMENT(v4lmjpegsrc)->channel;
if (!gst_v4lmjpegsrc_set_input_norm(v4lmjpegsrc, input, norm))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return parent_value;
return GST_STATE_SUCCESS;
}
static GstBuffer*
gst_v4lmjpegsrc_buffer_new (GstBufferPool *pool,
guint64 location,
guint size,
gpointer user_data)
{
GstBuffer *buffer;
GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC(user_data);
if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lmjpegsrc)))
return NULL;
buffer = gst_buffer_new();
if (!buffer)
return NULL;
/* TODO: add interlacing info to buffer as metadata */
GST_BUFFER_MAXSIZE(buffer) = v4lmjpegsrc->breq.size;
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_DONTFREE);
return buffer;
}
static void
gst_v4lmjpegsrc_buffer_free (GstBufferPool *pool, GstBuffer *buf, gpointer user_data)
{
GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (user_data);
int n;
if (gst_element_get_state(GST_ELEMENT(v4lmjpegsrc)) != GST_STATE_PLAYING)
return; /* we've already cleaned up ourselves */
for (n=0;n<v4lmjpegsrc->breq.count;n++)
if (GST_BUFFER_DATA(buf) == gst_v4lmjpegsrc_get_buffer(v4lmjpegsrc, n))
{
gst_v4lmjpegsrc_requeue_frame(v4lmjpegsrc, n);
break;
}
if (n == v4lmjpegsrc->breq.count)
gst_element_error(GST_ELEMENT(v4lmjpegsrc),
"Couldn't find the buffer");
/* free the buffer struct et all */
gst_buffer_default_free(buf);
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
GstCaps *caps;
/* create an elementfactory for the v4lmjpegsrcparse element */
factory = gst_element_factory_new("v4lmjpegsrc",GST_TYPE_V4LMJPEGSRC,
&gst_v4lmjpegsrc_details);
g_return_val_if_fail(factory != NULL, FALSE);
caps = gst_caps_new ("v4lmjpegsrc_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);
src_template = gst_pad_template_new (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
capslist, NULL);
gst_element_factory_add_pad_template (factory, src_template);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"v4lmjpegsrc",
plugin_init
};
Reference in a new issue View git blame Copy permalink