gstreamer/ext/dirac/gstdiracdec.cc
2012-11-04 00:09:59 +00:00

359 lines
11 KiB
C++

/* GStreamer
* Copyright (C) 2004 David A. Schleef <ds@schleef.org>
* Copyright (C) 2004 Ronald S. 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/video/video.h>
#include "gstdiracdec.h"
GST_DEBUG_CATEGORY (diracdec_debug);
#define GST_CAT_DEFAULT diracdec_debug
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
static void gst_diracdec_base_init (gpointer g_class);
static void gst_diracdec_class_init (GstDiracDec * klass);
static void gst_diracdec_init (GstDiracDec * diracdec);
static void gst_diracdec_dispose (GObject * object);
static void gst_diracdec_chain (GstPad * pad, GstData * data);
static GstStateChangeReturn gst_diracdec_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
/*static guint gst_diracdec_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_diracdec_get_type (void)
{
static GType diracdec_type = 0;
if (!diracdec_type) {
static const GTypeInfo diracdec_info = {
sizeof (GstDiracDecClass),
gst_diracdec_base_init,
NULL,
(GClassInitFunc) gst_diracdec_class_init,
NULL,
NULL,
sizeof (GstDiracDec),
0,
(GInstanceInitFunc) gst_diracdec_init,
};
diracdec_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstDiracDec", &diracdec_info,
(GTypeFlags) 0);
}
return diracdec_type;
}
static GstStaticPadTemplate gst_diracdec_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
/* FIXME: 444 (planar? packed?), 411 (Y41B? Y41P?) */
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YUY2, Y800 }"))
);
static GstStaticPadTemplate gst_diracdec_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-dirac")
);
static void
gst_diracdec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_static_pad_template (element_class,
&gst_diracdec_src_pad_template);
gst_element_class_add_static_pad_template (element_class,
&gst_diracdec_sink_pad_template);
gst_element_class_set_static_metadata (element_class, "Dirac stream decoder",
"Codec/Decoder/Video", "Decode DIRAC streams",
"David Schleef <ds@schleef.org>, "
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
}
static void
gst_diracdec_class_init (GstDiracDec * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
gobject_class->dispose = gst_diracdec_dispose;
element_class->change_state = gst_diracdec_change_state;
GST_DEBUG_CATEGORY_INIT (diracdec_debug, "diracdec", 0, "DIRAC decoder");
}
static void
gst_diracdec_dispose (GObject * object)
{
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_diracdec_init (GstDiracDec * diracdec)
{
GST_DEBUG ("gst_diracdec_init: initializing");
/* create the sink and src pads */
diracdec->sinkpad =
gst_pad_new_from_static_template (&gst_diracdec_sink_pad_template,
"sink");
gst_pad_set_chain_function (diracdec->sinkpad, gst_diracdec_chain);
gst_element_add_pad (GST_ELEMENT (diracdec), diracdec->sinkpad);
diracdec->srcpad =
gst_pad_new_from_static_template (&gst_diracdec_src_pad_template, "src");
gst_pad_use_explicit_caps (diracdec->srcpad);
gst_element_add_pad (GST_ELEMENT (diracdec), diracdec->srcpad);
/* no capsnego done yet */
diracdec->width = -1;
diracdec->height = -1;
diracdec->fps = 0;
diracdec->fcc = 0;
}
static guint32
gst_diracdec_chroma_to_fourcc (dirac_chroma_t chroma)
{
guint32 fourcc = 0;
switch (chroma) {
case Yonly:
fourcc = GST_MAKE_FOURCC ('Y', '8', '0', '0');
break;
case format422:
fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
break;
/* planar? */
case format420:
case format444:
case format411:
default:
break;
}
return fourcc;
}
static gboolean
gst_diracdec_link (GstDiracDec * diracdec,
gint width, gint height, gdouble fps, guint32 fourcc)
{
GstCaps *caps;
if (width == diracdec->width &&
height == diracdec->height &&
fps == diracdec->fps && fourcc == diracdec->fcc) {
return TRUE;
}
if (!fourcc) {
g_warning ("Chroma not supported\n");
return FALSE;
}
caps = gst_caps_new_simple ("video/x-raw-yuv",
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"format", GST_TYPE_FOURCC, fourcc, "framerate", G_TYPE_DOUBLE, fps, NULL);
if (gst_pad_set_explicit_caps (diracdec->srcpad, caps)) {
diracdec->width = width;
diracdec->height = height;
switch (fourcc) {
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
diracdec->size = width * height * 2;
break;
case GST_MAKE_FOURCC ('Y', '8', '0', '0'):
diracdec->size = width * height;
break;
}
diracdec->fcc = fourcc;
diracdec->fps = fps;
return TRUE;
}
return FALSE;
}
static void
gst_diracdec_chain (GstPad * pad, GstData * _data)
{
GstDiracDec *diracdec = GST_DIRACDEC (gst_pad_get_parent (pad));
GstBuffer *buf = GST_BUFFER (_data), *out;
gboolean c = TRUE;
/* get state and do something */
while (c) {
switch (dirac_parse (diracdec->decoder)) {
case STATE_BUFFER:
if (buf) {
/* provide data to decoder */
dirac_buffer (diracdec->decoder, GST_BUFFER_DATA (buf),
GST_BUFFER_DATA (buf) + GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
buf = NULL;
} else {
/* need more data */
c = FALSE;
}
break;
case STATE_SEQUENCE:{
guint8 *buf[3];
gint fps_num, fps_denom;
fps_num = diracdec->decoder->seq_params.frame_rate.numerator;
fps_denom = diracdec->decoder->seq_params.frame_rate.denominator;
/* start-of-sequence - allocate buffer */
if (!gst_diracdec_link (diracdec,
diracdec->decoder->seq_params.width,
diracdec->decoder->seq_params.height,
(gdouble) fps_num / (gdouble) fps_denom,
gst_diracdec_chroma_to_fourcc (diracdec->decoder->
seq_params.chroma))) {
GST_ELEMENT_ERROR (diracdec, CORE, NEGOTIATION, (NULL),
("Failed to set caps to %dx%d @ %d fps (format=" GST_FOURCC_FORMAT
"/%d)", diracdec->decoder->seq_params.width,
diracdec->decoder->seq_params.height,
diracdec->decoder->seq_params.frame_rate,
gst_diracdec_chroma_to_fourcc (diracdec->decoder->
seq_params.chroma),
diracdec->decoder->seq_params.chroma));
c = FALSE;
break;
}
g_free (diracdec->decoder->fbuf->buf[0]);
g_free (diracdec->decoder->fbuf->buf[1]);
g_free (diracdec->decoder->fbuf->buf[2]);
buf[0] = (guchar *) g_malloc (diracdec->decoder->seq_params.width *
diracdec->decoder->seq_params.height);
if (diracdec->decoder->seq_params.chroma != Yonly) {
buf[1] =
(guchar *) g_malloc (diracdec->decoder->seq_params.chroma_width *
diracdec->decoder->seq_params.chroma_height);
buf[2] =
(guchar *) g_malloc (diracdec->decoder->seq_params.chroma_width *
diracdec->decoder->seq_params.chroma_height);
}
dirac_set_buf (diracdec->decoder, buf, NULL);
break;
}
case STATE_SEQUENCE_END:
/* end-of-sequence - free buffer */
g_free (diracdec->decoder->fbuf->buf[0]);
diracdec->decoder->fbuf->buf[0] = NULL;
g_free (diracdec->decoder->fbuf->buf[1]);
diracdec->decoder->fbuf->buf[1] = NULL;
g_free (diracdec->decoder->fbuf->buf[2]);
diracdec->decoder->fbuf->buf[2] = NULL;
break;
case STATE_PICTURE_START:
/* start of one picture */
break;
case STATE_PICTURE_AVAIL:
/* one picture is decoded */
out = gst_pad_alloc_buffer (diracdec->srcpad, 0, diracdec->size);
memcpy (GST_BUFFER_DATA (out), diracdec->decoder->fbuf->buf[0],
diracdec->width * diracdec->height);
if (diracdec->fcc != GST_MAKE_FOURCC ('Y', '8', '0', '0')) {
memcpy (GST_BUFFER_DATA (out) + (diracdec->width *
diracdec->height), diracdec->decoder->fbuf->buf[1],
diracdec->decoder->seq_params.chroma_width *
diracdec->decoder->seq_params.chroma_height);
memcpy (GST_BUFFER_DATA (out) +
(diracdec->decoder->seq_params.chroma_width *
diracdec->decoder->seq_params.chroma_height) +
(diracdec->width * diracdec->height),
diracdec->decoder->fbuf->buf[2],
diracdec->decoder->seq_params.chroma_width *
diracdec->decoder->seq_params.chroma_height);
}
GST_BUFFER_TIMESTAMP (out) = (guint64) (GST_SECOND *
diracdec->decoder->frame_params.fnum / diracdec->fps);
GST_BUFFER_DURATION (out) = (guint64) (GST_SECOND / diracdec->fps);
gst_pad_push (diracdec->srcpad, GST_DATA (out));
break;
case STATE_INVALID:
default:
GST_ELEMENT_ERROR (diracdec, LIBRARY, TOO_LAZY, (NULL), (NULL));
c = FALSE;
break;
}
}
}
static GstStateChangeReturn
gst_diracdec_change_state (GstElement * element, GstStateChange transition)
{
GstDiracDec *diracdec = GST_DIRACDEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!(diracdec->decoder = dirac_decoder_init (0)))
return GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
dirac_decoder_close (diracdec->decoder);
diracdec->width = diracdec->height = -1;
diracdec->fps = 0.;
diracdec->fcc = 0;
break;
default:
break;
}
return parent_class->change_state (element, transition);
}