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gstreamer/ext/xvid/gstxviddec.c
Jan Schmidt 0051f0e18e ifdef out ARGB type when it isn't available in xvidcore 1.0.0beta2 
Original commit message from CVS:
ifdef out ARGB type when it isn't available in xvidcore 1.0.0beta2
2004-01-06 14:34:52 +00:00

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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
#include "config.h"
#endif
#include <string.h>
#include <xvid.h>
#include <gst/video/video.h>
#include "gstxviddec.h"
/* elementfactory information */
GstElementDetails gst_xviddec_details = {
"Xvid decoder",
"Codec/Video/Decoder",
"Xvid decoder based on xvidcore",
"Ronald Bultje <rbultje@ronald.bitfreak.net>",
};
static GstStaticPadTemplate sink_template =
GST_STATIC_PAD_TEMPLATE (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
"video/x-xvid, "
"width = (int) [ 0, MAX ], "
"height = (int) [ 0, MAX ], "
"framerate = (double) [ 0, MAX ]"
)
);
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
GST_VIDEO_YUV_PAD_TEMPLATE_CAPS ("{ I420, YUY2, YV12, YVYU, UYVY }") "; "
#ifdef XVID_CSP_ARGB
RGB_24_32_STATIC_CAPS (32, 0x00ff0000, 0x0000ff00, 0x000000ff) "; "
#endif
RGB_24_32_STATIC_CAPS (32, 0xff000000, 0x00ff0000, 0x0000ff00) "; "
RGB_24_32_STATIC_CAPS (32, 0x0000ff00, 0x00ff0000, 0xff000000) "; "
RGB_24_32_STATIC_CAPS (32, 0x000000ff, 0x0000ff00, 0x00ff0000) "; "
RGB_24_32_STATIC_CAPS (24, 0x0000ff, 0x00ff00, 0xff0000) "; "
GST_VIDEO_RGB_PAD_TEMPLATE_CAPS_15_16
)
);
/* XvidDec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0
/* FILL ME */
};
static void gst_xviddec_base_init (gpointer g_class);
static void gst_xviddec_class_init (GstXvidDecClass *klass);
static void gst_xviddec_init (GstXvidDec *xviddec);
static void gst_xviddec_chain (GstPad *pad,
GstData *data);
static GstPadLinkReturn
gst_xviddec_sink_link (GstPad *pad,
const GstCaps *vscapslist);
static GstPadLinkReturn
gst_xviddec_src_link (GstPad *pad,
const GstCaps *vscapslist);
static GstCaps *
gst_xviddec_src_getcaps (GstPad *pad);
static GstElementStateReturn
gst_xviddec_change_state (GstElement *element);
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),
gst_xviddec_base_init,
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_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_set_details (element_class, &gst_xviddec_details);
}
static void
gst_xviddec_class_init (GstXvidDecClass *klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gstelement_class->change_state = gst_xviddec_change_state;
}
static void
gst_xviddec_init (GstXvidDec *xviddec)
{
gst_xvid_init();
/* create the sink pad */
xviddec->sinkpad = gst_pad_new_from_template(
gst_static_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_sink_link);
/* create the src pad */
xviddec->srcpad = gst_pad_new_from_template(
gst_static_pad_template_get (&src_template),
"src");
gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->srcpad);
gst_pad_set_getcaps_function (xviddec->srcpad, gst_xviddec_src_getcaps);
gst_pad_set_link_function(xviddec->srcpad, gst_xviddec_src_link);
/* size, 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_create_t xdec;
int ret;
/* initialise parameters, see xvid documentation */
gst_xvid_init_struct (xdec);
xdec.width = xviddec->width;
xdec.height = xviddec->height;
xdec.handle = NULL;
if ((ret = xvid_decore(NULL, XVID_DEC_CREATE,
&xdec, NULL)) < 0) {
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_chain (GstPad *pad,
GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstXvidDec *xviddec = GST_XVIDDEC(GST_OBJECT_PARENT(pad));
GstBuffer *outbuf;
xvid_dec_frame_t xframe;
int ret;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
if (!xviddec->handle) {
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_DURATION(outbuf) = GST_BUFFER_DURATION(buf);
GST_BUFFER_SIZE(outbuf) = xviddec->width *
xviddec->height *
xviddec->bpp / 8;
/* decode and so ... */
gst_xvid_init_struct (xframe);
xframe.general = 0;
xframe.bitstream = (void *) GST_BUFFER_DATA(buf);
xframe.length = GST_BUFFER_SIZE(buf);
xframe.output.csp = xviddec->csp;
if (xviddec->width == xviddec->stride) {
xframe.output.plane[0] = GST_BUFFER_DATA(outbuf);
xframe.output.plane[1] = xframe.output.plane[0] + (xviddec->width * xviddec->height);
xframe.output.plane[2] = xframe.output.plane[1] + (xviddec->width * xviddec->height / 4);
xframe.output.stride[0] = xviddec->width;
xframe.output.stride[1] = xviddec->width / 2;
xframe.output.stride[2] = xviddec->width / 2;
} else {
xframe.output.plane[0] = GST_BUFFER_DATA(outbuf);
xframe.output.stride[0] = xviddec->stride;
}
if ((ret = xvid_decore(xviddec->handle, XVID_DEC_DECODE,
&xframe, NULL)) < 0) {
gst_element_error(GST_ELEMENT(xviddec),
"Error decoding xvid frame: %s (%d)\n",
gst_xvid_error(ret), ret);
gst_buffer_unref(buf);
gst_buffer_unref(outbuf);
return;
}
gst_pad_push(xviddec->srcpad, GST_DATA (outbuf));
gst_buffer_unref(buf);
}
static GstCaps *
gst_xviddec_src_getcaps (GstPad *pad)
{
GstXvidDec *xviddec = GST_XVIDDEC (gst_pad_get_parent (pad));
GstCaps *caps;
gint csp[] = {
XVID_CSP_I420,
XVID_CSP_YV12,
XVID_CSP_YUY2,
XVID_CSP_UYVY,
XVID_CSP_YVYU,
XVID_CSP_BGRA,
XVID_CSP_ABGR,
XVID_CSP_RGBA,
#ifdef XVID_CSP_ARGB
XVID_CSP_ARGB,
#endif
XVID_CSP_BGR,
XVID_CSP_RGB555,
XVID_CSP_RGB565,
0
}, i;
if (!GST_PAD_CAPS (xviddec->sinkpad)) {
GstPadTemplate *templ = gst_static_pad_template_get (&src_template);
return gst_caps_copy (gst_pad_template_get_caps (templ));
}
caps = gst_caps_new_empty ();
for (i = 0; csp[i] != 0; i++) {
GstCaps *one = gst_xvid_csp_to_caps (csp[i], xviddec->width,
xviddec->height, xviddec->fps);
gst_caps_append (caps, one);
}
return caps;
}
static GstPadLinkReturn
gst_xviddec_src_link (GstPad *pad,
const GstCaps *vscaps)
{
GstXvidDec *xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
GstStructure *structure = gst_caps_get_structure (vscaps, 0);
if (!GST_PAD_CAPS (xviddec->sinkpad))
return GST_PAD_LINK_DELAYED;
/* if there's something old around, remove it */
if (xviddec->handle) {
gst_xviddec_unset(xviddec);
}
g_print ("out: %s\n", gst_caps_to_string (vscaps));
xviddec->csp = gst_xvid_structure_to_csp (structure, xviddec->width,
&xviddec->stride,
&xviddec->bpp);
if (xviddec->csp < 0)
return GST_PAD_LINK_REFUSED;
if (!gst_xviddec_setup(xviddec))
return GST_PAD_LINK_REFUSED;;
return GST_PAD_LINK_OK;
}
static GstPadLinkReturn
gst_xviddec_sink_link (GstPad *pad,
const GstCaps *vscaps)
{
GstXvidDec *xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
GstStructure *structure;
/* if there's something old around, remove it */
if (xviddec->handle) {
gst_xviddec_unset(xviddec);
}
/* if we get here, we know the input is xvid. we
* only need to bother with the output colorspace,
* which the src_link function takes care of. */
structure = gst_caps_get_structure (vscaps, 0);
gst_structure_get_int(structure, "width", &xviddec->width);
gst_structure_get_int(structure, "height", &xviddec->height);
gst_structure_get_double(structure, "framerate", &xviddec->fps);
g_print ("in: %dx%d\n", xviddec->width, xviddec->height);
/* re-nego? or just await src nego? */
if (GST_PAD_CAPS(xviddec->srcpad)) {
GstPadLinkReturn ret;
GstCaps *vscaps = gst_pad_get_caps (GST_PAD_PEER (xviddec->srcpad)), *new;
gint i, csp;
for (i = 0; i < gst_caps_get_size (vscaps); i++) {
csp = gst_xvid_structure_to_csp (gst_caps_get_structure (vscaps, i),
0, NULL, NULL);
new = gst_xvid_csp_to_caps (csp, xviddec->width, xviddec->height, xviddec->fps);
ret = gst_pad_try_set_caps(xviddec->srcpad, new);
if (ret != GST_PAD_LINK_REFUSED)
return ret;
}
return GST_PAD_LINK_REFUSED;
}
return GST_PAD_LINK_OK;
}
static GstElementStateReturn
gst_xviddec_change_state (GstElement *element)
{
GstXvidDec *xviddec = GST_XVIDDEC (element);
switch (GST_STATE_PENDING (element)) {
case GST_STATE_PAUSED_TO_READY:
if (xviddec->handle) {
gst_xviddec_unset (xviddec);
}
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
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