gstreamer/ext/xvid/gstxviddec.c

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/* GStreamer xvid decoder plugin
* Copyright (C) 2003 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.
*/
#ifdef HAVE_CONFIG_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "config.h"
#endif
#include <string.h>
#include "gstxviddec.h"
#include <gst/video/video.h>
/* elementfactory information */
GstElementDetails gst_xviddec_details = {
"Xvid decoder",
"Codec/Video/Decoder",
"GPL",
"Xvid decoder based on xviddecore",
VERSION,
"Ronald Bultje <rbultje@ronald.bitfreak.net>",
"(C) 2003",
};
GST_PAD_TEMPLATE_FACTORY(sink_template,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW("xviddec_sink",
"video/x-xvid",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT),
"framerate", GST_PROPS_FLOAT_RANGE (0, G_MAXFLOAT))
)
GST_PAD_TEMPLATE_FACTORY(src_template,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
gst_caps_new(
"xviddec_sink",
"video/x-raw-yuv",
GST_VIDEO_YUV_PAD_TEMPLATE_PROPS (
GST_PROPS_LIST(
GST_PROPS_FOURCC(GST_MAKE_FOURCC('I','4','2','0')),
GST_PROPS_FOURCC(GST_MAKE_FOURCC('Y','U','Y','2')),
GST_PROPS_FOURCC(GST_MAKE_FOURCC('Y','V','1','2')),
GST_PROPS_FOURCC(GST_MAKE_FOURCC('Y','V','Y','U')),
GST_PROPS_FOURCC(GST_MAKE_FOURCC('U','Y','V','Y'))
)
)
),
gst_caps_new(
"xviddec_sink_rgb24_32",
"video/x-raw-rgb",
GST_VIDEO_RGB_PAD_TEMPLATE_PROPS_24_32
),
gst_caps_new(
"xviddec_sink_rgb15_16",
"video/x-raw-rgb",
GST_VIDEO_RGB_PAD_TEMPLATE_PROPS_15_16
)
)
/* XvidDec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0
/* FILL ME */
};
static void gst_xviddec_class_init (GstXvidDecClass *klass);
static void gst_xviddec_init (GstXvidDec *xviddec);
static void gst_xviddec_dispose (GObject *object);
static void gst_xviddec_chain (GstPad *pad,
GstBuffer *buf);
static GstPadLinkReturn gst_xviddec_connect (GstPad *pad,
GstCaps *vscapslist);
static GstPadLinkReturn gst_xviddec_negotiate (GstXvidDec *xviddec);
static GstElementClass *parent_class = NULL;
/* static guint gst_xviddec_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_xviddec_get_type(void)
{
static GType xviddec_type = 0;
if (!xviddec_type)
{
static const GTypeInfo xviddec_info = {
sizeof(GstXvidDecClass),
NULL,
NULL,
(GClassInitFunc) gst_xviddec_class_init,
NULL,
NULL,
sizeof(GstXvidDec),
0,
(GInstanceInitFunc) gst_xviddec_init,
};
xviddec_type = g_type_register_static(GST_TYPE_ELEMENT,
"GstXvidDec",
&xviddec_info, 0);
}
return xviddec_type;
}
static void
gst_xviddec_class_init (GstXvidDecClass *klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gst_xvid_init();
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->dispose = gst_xviddec_dispose;
}
static void
gst_xviddec_init (GstXvidDec *xviddec)
{
/* create the sink pad */
xviddec->sinkpad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET(sink_template),
"sink");
gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->sinkpad);
gst_pad_set_chain_function(xviddec->sinkpad, gst_xviddec_chain);
gst_pad_set_link_function(xviddec->sinkpad, gst_xviddec_connect);
/* create the src pad */
xviddec->srcpad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET(src_template),
"src");
gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->srcpad);
/* bitrate, etc. */
xviddec->width = xviddec->height = xviddec->csp = -1;
/* set xvid handle to NULL */
xviddec->handle = NULL;
}
static void
gst_xviddec_unset (GstXvidDec *xviddec)
{
/* unref this instance */
xvid_decore(xviddec->handle, XVID_DEC_DESTROY, NULL, NULL);
xviddec->handle = NULL;
}
static gboolean
gst_xviddec_setup (GstXvidDec *xviddec)
{
XVID_DEC_PARAM xdec;
int ret;
/* initialise parameters, see xvid documentation */
memset(&xdec, 0, sizeof(XVID_DEC_PARAM));
xdec.width = xviddec->width;
xdec.height = xviddec->height;
if ((ret = xvid_decore(NULL, XVID_DEC_CREATE,
&xdec, NULL)) != XVID_ERR_OK) {
gst_element_error(GST_ELEMENT(xviddec),
"Setting parameters %dx%d@%d failed: %s (%d)",
xviddec->width, xviddec->height, xviddec->csp,
gst_xvid_error(ret), ret);
return FALSE;
}
xviddec->handle = xdec.handle;
return TRUE;
}
static void
gst_xviddec_dispose (GObject *object)
{
GstXvidDec *xviddec = GST_XVIDDEC(object);
gst_xviddec_unset(xviddec);
}
static void
gst_xviddec_chain (GstPad *pad,
GstBuffer *buf)
{
GstXvidDec *xviddec;
GstBuffer *outbuf;
XVID_DEC_FRAME xframe;
int ret;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
g_return_if_fail(buf != NULL);
xviddec = GST_XVIDDEC(GST_OBJECT_PARENT(pad));
if (!xviddec->handle) {
if (!gst_xviddec_negotiate(xviddec)) {
gst_element_error(GST_ELEMENT(xviddec),
"No format set - aborting");
gst_buffer_unref(buf);
return;
}
}
outbuf = gst_buffer_new_and_alloc(xviddec->width *
xviddec->height *
xviddec->bpp / 8);
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
GST_BUFFER_SIZE(outbuf) = xviddec->width *
xviddec->height *
xviddec->bpp / 8;
/* encode and so ... */
xframe.bitstream = (void *) GST_BUFFER_DATA(buf);
xframe.image = (void *) GST_BUFFER_DATA(outbuf);
xframe.length = GST_BUFFER_SIZE(buf);
xframe.stride = 0; /*xviddec->width * xviddec->bpp / 8;*/
xframe.colorspace = xviddec->csp;
if ((ret = xvid_decore(xviddec->handle, XVID_DEC_DECODE,
&xframe, NULL))) {
gst_element_error(GST_ELEMENT(xviddec),
"Error decoding xvid frame: %s (%d)\n",
gst_xvid_error(ret), ret);
gst_buffer_unref(buf);
return;
}
gst_pad_push(xviddec->srcpad, outbuf);
gst_buffer_unref(buf);
}
static GstPadLinkReturn
gst_xviddec_negotiate (GstXvidDec *xviddec)
{
GstPadLinkReturn ret;
GstCaps *caps;
struct {
guint32 fourcc;
gint depth, bpp;
gint csp;
} fmt_list[] = {
{ GST_MAKE_FOURCC('Y','U','Y','V'), 16, 16, XVID_CSP_YUY2 },
{ GST_MAKE_FOURCC('U','Y','V','Y'), 16, 16, XVID_CSP_UYVY },
{ GST_MAKE_FOURCC('Y','V','Y','U'), 16, 16, XVID_CSP_YVYU },
{ GST_MAKE_FOURCC('Y','V','1','2'), 12, 12, XVID_CSP_YV12 },
{ GST_MAKE_FOURCC('I','4','2','0'), 12, 12, XVID_CSP_I420 },
{ GST_MAKE_FOURCC('R','G','B',' '), 32, 32, XVID_CSP_RGB32 },
{ GST_MAKE_FOURCC('R','G','B',' '), 24, 24, XVID_CSP_RGB24 },
{ GST_MAKE_FOURCC('R','G','B',' '), 16, 16, XVID_CSP_RGB555 },
{ GST_MAKE_FOURCC('R','G','B',' '), 15, 16, XVID_CSP_RGB565 },
{ 0, 0, 0 }
};
gint i;
for (i = 0; fmt_list[i].fourcc != 0; i++) {
xviddec->csp = fmt_list[i].csp;
/* try making a caps to set on the other side */
if (fmt_list[i].fourcc == GST_MAKE_FOURCC('R','G','B',' ')) {
guint32 r_mask = 0, b_mask = 0, g_mask = 0;
gint endianness = 0;
switch (fmt_list[i].depth) {
case 15:
endianness = G_BYTE_ORDER;
r_mask = 0xf800; g_mask = 0x07c0; b_mask = 0x003e;
break;
case 16:
endianness = G_BYTE_ORDER;
r_mask = 0xf800; g_mask = 0x07e0; b_mask = 0x001f;
break;
case 24:
endianness = G_BIG_ENDIAN;
r_mask = R_MASK_24; g_mask = G_MASK_24; b_mask = B_MASK_24;
break;
case 32:
endianness = G_BIG_ENDIAN;
r_mask = R_MASK_32; g_mask = G_MASK_32; b_mask = B_MASK_32;
break;
}
caps = GST_CAPS_NEW("xviddec_src_pad_rgb",
"video/x-raw-rgb",
"width", GST_PROPS_INT(xviddec->width),
"height", GST_PROPS_INT(xviddec->height),
"depth", GST_PROPS_INT(fmt_list[i].depth),
"bpp", GST_PROPS_INT(fmt_list[i].bpp),
"endianness", GST_PROPS_INT(endianness),
"red_mask", GST_PROPS_INT(r_mask),
"green_mask", GST_PROPS_INT(g_mask),
"blue_mask", GST_PROPS_INT(b_mask),
"framerate", GST_PROPS_FLOAT(xviddec->fps),
NULL);
} else {
caps = GST_CAPS_NEW("xviddec_src_pad_yuv",
"video/x-raw-yuv",
"width", GST_PROPS_INT(xviddec->width),
"height", GST_PROPS_INT(xviddec->height),
"format", GST_PROPS_FOURCC(fmt_list[i].fourcc),
"framerate", GST_PROPS_FLOAT(xviddec->fps),
NULL);
}
if ((ret = gst_pad_try_set_caps(xviddec->srcpad, caps)) > 0) {
xviddec->csp = fmt_list[i].csp;
xviddec->bpp = fmt_list[i].bpp;
if (gst_xviddec_setup(xviddec))
return GST_PAD_LINK_OK;
} else if (ret == GST_PAD_LINK_DELAYED) {
return ret; /* don't try further (yet) */
}
}
/* if we got here - it's not good */
return GST_PAD_LINK_REFUSED;
}
static GstPadLinkReturn
gst_xviddec_connect (GstPad *pad,
GstCaps *vscaps)
{
GstXvidDec *xviddec;
xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
/* if there's something old around, remove it */
if (xviddec->handle) {
gst_xviddec_unset(xviddec);
}
/* we are not going to act on variable caps */
if (!GST_CAPS_IS_FIXED(vscaps))
return GST_PAD_LINK_DELAYED;
/* if we get here, we know the input is xvid. we
* only need to bother with the output colorspace */
gst_caps_get_int(vscaps, "width", &xviddec->width);
gst_caps_get_int(vscaps, "height", &xviddec->height);
gst_caps_get_float(vscaps, "framerate", &xviddec->fps);
return gst_xviddec_negotiate(xviddec);
}
gboolean
gst_xviddec_plugin_init (GModule *module,
GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the v4lmjpegsrcparse element */
factory = gst_element_factory_new("xviddec", GST_TYPE_XVIDDEC,
&gst_xviddec_details);
g_return_val_if_fail(factory != NULL, FALSE);
/* add pad templates */
gst_element_factory_add_pad_template(factory,
GST_PAD_TEMPLATE_GET(sink_template));
gst_element_factory_add_pad_template(factory,
GST_PAD_TEMPLATE_GET(src_template));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
gst_element_factory_set_rank(factory, GST_ELEMENT_RANK_PRIMARY);
return TRUE;
}