gstreamer/ext/lcs/gstcolorspace.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <gst/gst.h>
#include <lcs/lcs.h>
#define GST_TYPE_COLORSPACE \
(gst_colorspace_get_type())
#define GST_COLORSPACE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COLORSPACE,GstColorspace))
#define GST_COLORSPACE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstColorspace))
#define GST_IS_COLORSPACE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COLORSPACE))
#define GST_IS_COLORSPACE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COLORSPACE))
typedef struct _GstColorspace GstColorspace;
typedef struct _GstColorspaceClass GstColorspaceClass;
typedef enum {
GST_COLORSPACE_NONE,
GST_COLORSPACE_LCS,
} GstColorSpaceConverterType;
struct _GstColorspace {
GstElement element;
GstPad *sinkpad, *srcpad;
LCSConverter *converter;
GstColorSpaceConverterType type;
gint width, height;
gboolean disabled;
GstCaps *sinkcaps;
GstBufferPool *pool;
};
struct _GstColorspaceClass {
GstElementClass parent_class;
};
static GstElementDetails colorspace_details = {
"Colorspace converter",
"Filter/Effect",
"Converts video from one colorspace to another",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2001",
};
/* Stereo signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_SOURCE,
ARG_DEST,
};
GST_PAD_TEMPLATE_FACTORY (colorspace_src_template_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"colorspace_src",
"video/raw",
"format", GST_PROPS_LIST (
GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("YV12")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("YUY2")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB "))
),
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT)
)
)
GST_PAD_TEMPLATE_FACTORY (colorspace_sink_template_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"colorspace_sink",
"video/raw",
"format", GST_PROPS_LIST (
GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("YV12")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("YUY2")),
GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB "))
),
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT)
)
)
static GType gst_colorspace_get_type (void);
static void gst_colorspace_class_init (GstColorspaceClass *klass);
static void gst_colorspace_init (GstColorspace *space);
static void gst_colorspace_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_colorspace_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static GstPadConnectReturn
gst_colorspace_sinkconnect (GstPad *pad, GstCaps *caps);
static GstPadConnectReturn
gst_colorspace_srcconnect (GstPad *pad, GstCaps *caps);
static GstPadConnectReturn
gst_colorspace_srcconnect_func (GstPad *pad, GstCaps *caps, gboolean newcaps);
static void gst_colorspace_chain (GstPad *pad, GstBuffer *buf);
static GstElementStateReturn
gst_colorspace_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
/*static guint gst_colorspace_signals[LAST_SIGNAL] = { 0 }; */
static GstBufferPool*
colorspace_get_bufferpool (GstPad *pad)
{
GstColorspace *space;
space = GST_COLORSPACE (gst_pad_get_parent (pad));
if (space->type == GST_COLORSPACE_NONE && !space->disabled)
return gst_pad_get_bufferpool (space->srcpad);
else
return NULL;
}
static const LCSFormat*
colorspace_find_lcs_format (GstCaps *caps)
{
const LCSFormat *format = NULL;
guint32 space;
gst_caps_get_fourcc_int (caps, "format", &space);
if (space == GST_MAKE_FOURCC ('R','G','B',' ')) {
gint mask, depth;
gulong red_bits, red_shift;
gulong green_bits, green_shift;
gulong blue_bits, blue_shift;
gst_caps_get_int (caps, "depth", &depth);
gst_caps_get_int (caps, "red_mask", &mask);
lcs_utils_mask_to_shift (mask, &red_bits, &red_shift);
gst_caps_get_int (caps, "green_mask", &mask);
lcs_utils_mask_to_shift (mask, &green_bits, &green_shift);
gst_caps_get_int (caps, "blue_mask", &mask);
lcs_utils_mask_to_shift (mask, &blue_bits, &blue_shift);
format = lcs_format_new_simple_rgb_packed (red_bits, green_bits, blue_bits, 0,
red_shift, green_shift, blue_shift, 0, depth, G_BYTE_ORDER);
GST_DEBUG (GST_CAT_NEGOTIATION, "%lu %lu %lu %lu %lu %lu %u %s\n", red_bits, green_bits, blue_bits,
red_shift, green_shift, blue_shift, depth, lcs_format_get_layout (format));
}
else {
gchar fourcc[5];
lcs_utils_fourcc_to_string (space, fourcc);
format = lcs_alias_find_format (fourcc);
}
return format;
}
static gboolean
colorspace_setup_converter (GstColorspace *space, GstCaps *from_caps, GstCaps *to_caps)
{
const LCSFormat *from_format = NULL;
const LCSFormat *to_format = NULL;
guint32 from_space, to_space;
g_return_val_if_fail (to_caps != NULL, FALSE);
g_return_val_if_fail (from_caps != NULL, FALSE);
gst_caps_get_fourcc_int (from_caps, "format", &from_space);
gst_caps_get_fourcc_int (to_caps, "format", &to_space);
from_format = colorspace_find_lcs_format (from_caps);
to_format = colorspace_find_lcs_format (to_caps);
GST_DEBUG (GST_CAT_NEGOTIATION, "trying from %4.4s to %4.4s\n", (gchar*)&from_space, (gchar*)&to_space);
space->converter = lcs_get_converter (from_format, to_format, LCS_FLAG_FAST);
if (space->converter) {
GST_DEBUG (GST_CAT_NEGOTIATION, "converting from %4.4s to %4.4s\n", (gchar*)&from_space, (gchar*)&to_space);
space->type = GST_COLORSPACE_LCS;
return TRUE;
}
return FALSE;
}
static GstCaps*
gst_colorspace_getcaps (GstPad *pad, GstCaps *caps)
{
GstColorspace *space;
GstCaps *result;
GstCaps *peercaps;
GstCaps *ourcaps;
space = GST_COLORSPACE (gst_pad_get_parent (pad));
/* we can do everything our peer can... */
peercaps = gst_caps_copy (gst_pad_get_allowed_caps (space->srcpad));
/* and our own template of course */
ourcaps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
/* merge them together, we prefer the peercaps first */
result = gst_caps_prepend (ourcaps, peercaps);
return result;
}
static GstPadConnectReturn
gst_colorspace_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstColorspace *space;
GstPad *peer;
space = GST_COLORSPACE (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_CONNECT_DELAYED;
}
gst_caps_get_int (caps, "width", &space->width);
gst_caps_get_int (caps, "height", &space->height);
GST_INFO (GST_CAT_PROPERTIES, "size: %dx%d", space->width, space->height);
space->sinkcaps = caps;
peer = gst_pad_get_peer (pad);
if (peer) {
if (gst_colorspace_srcconnect_func (pad, gst_pad_get_allowed_caps (space->srcpad), FALSE) < 1) {
space->sinkcaps = NULL;
return GST_PAD_CONNECT_REFUSED;
}
}
return GST_PAD_CONNECT_OK;
}
static GstPadConnectReturn
gst_colorspace_srcconnect (GstPad *pad, GstCaps *caps)
{
return gst_colorspace_srcconnect_func (pad, caps, TRUE);
}
static GstPadConnectReturn
gst_colorspace_srcconnect_func (GstPad *pad, GstCaps *caps, gboolean newcaps)
{
GstColorspace *space;
GstCaps *peercaps;
GstCaps *ourcaps;
space = GST_COLORSPACE (gst_pad_get_parent (pad));
/* we cannot operate if we didn't get src caps */
ourcaps = space->sinkcaps;
if (!ourcaps) {
if (newcaps)
gst_pad_recalc_allowed_caps (space->sinkpad);
return GST_PAD_CONNECT_DELAYED;
}
/* first see if we can do the format natively by filtering the peer caps
* with our incomming caps */
peercaps = gst_caps_intersect (caps, ourcaps);
if (peercaps) {
/* see if the peer likes it too, it should as the caps say so.. */
if (gst_pad_try_set_caps (space->srcpad, peercaps)) {
space->type = GST_COLORSPACE_NONE;
space->disabled = FALSE;
return GST_PAD_CONNECT_DONE;
}
}
/* then see what the peer has that matches the size */
peercaps = gst_caps_intersect (caps,
GST_CAPS_NEW (
"colorspace_filter",
"video/raw",
"width", GST_PROPS_INT (space->width),
"height", GST_PROPS_INT (space->height)
));
/* we are looping over the caps, so we have to get rid of the lists */
peercaps = gst_caps_normalize (peercaps);
/* loop over all possibilities and select the first one we can convert and
* is accepted by the peer */
while (peercaps) {
if (colorspace_setup_converter (space, ourcaps, peercaps)) {
if (gst_pad_try_set_caps (space->srcpad, peercaps)) {
space->disabled = FALSE;
return GST_PAD_CONNECT_DONE;
}
}
peercaps = peercaps->next;
}
//gst_element_error (GST_ELEMENT (space), "could not agree on caps with peer pads");
/* we disable ourself here */
space->disabled = TRUE;
return GST_PAD_CONNECT_REFUSED;
}
static GType
gst_colorspace_get_type (void)
{
static GType colorspace_type = 0;
if (!colorspace_type) {
static const GTypeInfo colorspace_info = {
sizeof(GstColorspaceClass),
NULL,
NULL,
(GClassInitFunc)gst_colorspace_class_init,
NULL,
NULL,
sizeof(GstColorspace),
0,
(GInstanceInitFunc)gst_colorspace_init,
};
colorspace_type = g_type_register_static(GST_TYPE_ELEMENT, "GstColorspaceLCS", &colorspace_info, 0);
}
return colorspace_type;
}
static void
gst_colorspace_class_init (GstColorspaceClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_colorspace_set_property;
gobject_class->get_property = gst_colorspace_get_property;
gstelement_class->change_state = gst_colorspace_change_state;
}
static void
gst_colorspace_init (GstColorspace *space)
{
space->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (colorspace_sink_template_factory), "sink");
gst_pad_set_connect_function (space->sinkpad, gst_colorspace_sinkconnect);
gst_pad_set_getcaps_function (space->sinkpad, gst_colorspace_getcaps);
gst_pad_set_bufferpool_function (space->sinkpad, colorspace_get_bufferpool);
gst_pad_set_chain_function(space->sinkpad,gst_colorspace_chain);
gst_element_add_pad(GST_ELEMENT(space),space->sinkpad);
space->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (colorspace_src_template_factory), "src");
gst_element_add_pad(GST_ELEMENT(space),space->srcpad);
gst_pad_set_connect_function (space->srcpad, gst_colorspace_srcconnect);
space->pool = NULL;
space->disabled = TRUE;
}
static void
gst_colorspace_chain (GstPad *pad,GstBuffer *buf)
{
GstColorspace *space;
GstBuffer *outbuf = NULL;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
space = GST_COLORSPACE (gst_pad_get_parent (pad));
g_return_if_fail (space != NULL);
g_return_if_fail (GST_IS_COLORSPACE (space));
if (space->disabled) {
gst_buffer_unref (buf);
return;
}
if (space->type == GST_COLORSPACE_NONE) {
outbuf = buf;
}
else {
if (space->pool) {
outbuf = gst_buffer_new_from_pool (space->pool, 0, 0);
}
if (!outbuf) {
guint size;
outbuf = gst_buffer_new ();
lcs_format_buffer_size (
lcs_convert_get_dest_format (space->converter),
space->width, space->height, &size);
GST_BUFFER_SIZE (outbuf) = size;
GST_BUFFER_DATA (outbuf) = g_malloc (size);
}
if (space->type == GST_COLORSPACE_LCS) {
lcs_convert_auto (space->converter,
GST_BUFFER_DATA (buf),
GST_BUFFER_DATA (outbuf),
space->width, space->height);
}
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
gst_buffer_unref (buf);
}
gst_pad_push (space->srcpad, outbuf);
}
static GstElementStateReturn
gst_colorspace_change_state (GstElement *element)
{
GstColorspace *space;
space = GST_COLORSPACE (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_PLAYING:
space->pool = gst_pad_get_bufferpool (space->srcpad);
break;
case GST_STATE_PLAYING_TO_PAUSED:
space->pool = NULL;
break;
}
parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
static void
gst_colorspace_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstColorspace *space;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_COLORSPACE(object));
space = GST_COLORSPACE(object);
switch (prop_id) {
default:
break;
}
}
static void
gst_colorspace_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstColorspace *space;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_COLORSPACE(object));
space = GST_COLORSPACE(object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
lcs_init (NULL, NULL);
factory = gst_element_factory_new ("colorspacelcs", GST_TYPE_COLORSPACE,
&colorspace_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (colorspace_src_template_factory));
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (colorspace_sink_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"colorspacelcs",
plugin_init
};