gstreamer/sys/v4l/gstv4lmjpegsrc.c
Ronald S. Bultje 88b8dc6b63 rrrrrrrrrrrrrrright, v4lmjpegsrc works
Original commit message from CVS:
rrrrrrrrrrrrrrright, v4lmjpegsrc works
2002-01-06 21:38:22 +00:00

524 lines
16 KiB
C

/* G-Streamer hardware MJPEG video source 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 "v4lmjpegsrc_calls.h"
static GstElementDetails gst_v4lmjpegsrc_details = {
"Video (video4linux/MJPEG) Source",
"Source/Video",
"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 GstPadNegotiateReturn gst_v4lmjpegsrc_negotiate (GstPad *pad,
GstCaps **caps,
gpointer *user_data);
static GstCaps* gst_v4lmjpegsrc_create_caps (GstV4lMjpegSrc *v4lmjpegsrc);
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,
gint64 location,
gint size,
gpointer user_data);
static GstBuffer* gst_v4lmjpegsrc_buffer_copy (GstBuffer *srcbuf);
static void gst_v4lmjpegsrc_buffer_free (GstBuffer *buf);
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("src", GST_PAD_SRC);
gst_element_add_pad(GST_ELEMENT(v4lmjpegsrc), v4lmjpegsrc->srcpad);
gst_pad_set_get_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_get);
gst_pad_set_negotiate_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_negotiate);
v4lmjpegsrc->bufferpool = gst_buffer_pool_new();
gst_buffer_pool_set_buffer_new_function(v4lmjpegsrc->bufferpool, gst_v4lmjpegsrc_buffer_new);
gst_buffer_pool_set_buffer_copy_function(v4lmjpegsrc->bufferpool, gst_v4lmjpegsrc_buffer_copy);
gst_buffer_pool_set_buffer_free_function(v4lmjpegsrc->bufferpool, gst_v4lmjpegsrc_buffer_free);
gst_buffer_pool_set_user_data(v4lmjpegsrc->bufferpool, 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;
v4lmjpegsrc->init = TRUE;
}
static GstPadNegotiateReturn
gst_v4lmjpegsrc_negotiate (GstPad *pad,
GstCaps **caps,
gpointer *user_data)
{
GstV4lMjpegSrc *v4lmjpegsrc;
v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
if (!*caps) {
return GST_PAD_NEGOTIATE_FAIL;
}
else {
return GST_PAD_NEGOTIATE_AGREE;
}
return GST_PAD_NEGOTIATE_FAIL;
}
static GstCaps*
gst_v4lmjpegsrc_create_caps (GstV4lMjpegSrc *v4lmjpegsrc)
{
GstCaps *caps;
caps = GST_CAPS_NEW (
"v4lmjpegsrc_caps",
"video/jpeg",
"width", GST_PROPS_INT(v4lmjpegsrc->end_width),
"height", GST_PROPS_INT(v4lmjpegsrc->end_height)
);
return caps;
}
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));
if (v4lmjpegsrc->init) {
gst_pad_set_caps (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_create_caps (v4lmjpegsrc));
v4lmjpegsrc->init = FALSE;
}
else {
if (!gst_pad_get_caps (v4lmjpegsrc->srcpad) &&
!gst_pad_renegotiate (v4lmjpegsrc->srcpad)) {
return NULL;
}
}
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);
buf->timestamp = v4lmjpegsrc->bsync.timestamp.tv_sec * 1000000000 +
v4lmjpegsrc->bsync.timestamp.tv_usec * 1000;
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:
/*parent_class->set_property(object, prop_id, value, 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_NUMBUFS:
g_value_set_int(value, v4lmjpegsrc->breq.count);
break;
case ARG_BUFSIZE:
g_value_set_int(value, v4lmjpegsrc->breq.size);
break;
default:
/*parent_class->get_property(object, prop_id, value, 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:
/* set buffer info */
if (!gst_v4lmjpegsrc_set_buffer(v4lmjpegsrc, v4lmjpegsrc->numbufs, v4lmjpegsrc->bufsize))
return GST_STATE_FAILURE;
/* 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_STATE_FAILURE;
}
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_STATE_FAILURE;
}
v4lmjpegsrc->init = TRUE;
if (!gst_v4lmjpegsrc_capture_init(v4lmjpegsrc))
return GST_STATE_FAILURE;
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);
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,
gint64 location,
gint size,
gpointer user_data)
{
GstBuffer *buffer;
buffer = gst_buffer_new();
if (!buffer) return NULL;
buffer->pool_private = user_data;
/* TODO: add interlacing info to buffer as metadata */
return buffer;
}
static GstBuffer*
gst_v4lmjpegsrc_buffer_copy (GstBuffer *srcbuf)
{
GstBuffer *buffer;
buffer = gst_buffer_new();
if (!buffer) return NULL;
GST_BUFFER_DATA(buffer) = g_malloc(GST_BUFFER_SIZE(srcbuf));
if (!GST_BUFFER_DATA(buffer)) return NULL;
GST_BUFFER_SIZE(buffer) = GST_BUFFER_SIZE(srcbuf);
memcpy(GST_BUFFER_DATA(buffer), GST_BUFFER_DATA(srcbuf), GST_BUFFER_SIZE(srcbuf));
GST_BUFFER_TIMESTAMP(buffer) = GST_BUFFER_TIMESTAMP(srcbuf);
return buffer;
}
static void
gst_v4lmjpegsrc_buffer_free (GstBuffer *buf)
{
GstV4lMjpegSrc *v4lmjpegsrc = buf->pool_private;
int n;
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);
return;
}
gst_element_error(GST_ELEMENT(v4lmjpegsrc),
"Couldn't find the buffer");
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the v4lmjpegsrcparse element */
factory = gst_elementfactory_new("v4lmjpegsrc",GST_TYPE_V4LMJPEGSRC,
&gst_v4lmjpegsrc_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"v4lmjpegsrc",
plugin_init
};