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
#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/Decoder/Video",
"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_CAPS_YUV ("{ I420, YUY2, YV12, YVYU, UYVY }")
"; " RGB_24_32_STATIC_CAPS (32, 0x00ff0000, 0x0000ff00,
0x000000ff) "; " 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_CAPS_RGB_15 "; " GST_VIDEO_CAPS_RGB_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 GstStateChangeReturn gst_xviddec_change_state (GstElement * element,
GstStateChange transition);
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 (xviddec, LIBRARY, SETTINGS, (NULL),
("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 (xviddec, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before chain function"));
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 = XVID_LOWDELAY;
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 (xviddec, STREAM, DECODE, (NULL),
("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);
}
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;
GstPadLinkReturn ret;
/* 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);
ret = gst_pad_renegotiate (xviddec->srcpad);
if (ret == GST_PAD_LINK_DELAYED)
ret = GST_PAD_LINK_OK;
return ret;
}
static GstStateChangeReturn
gst_xviddec_change_state (GstElement * element, GstStateChange transition)
{
GstXvidDec *xviddec = GST_XVIDDEC (element);
switch (GST_STATE_PENDING (element)) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (xviddec->handle) {
gst_xviddec_unset (xviddec);
}
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}