gstreamer/ext/jpeg/gstsmokeenc.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstsmokeenc.h"
#include <gst/video/video.h>
/* elementfactory information */
GstElementDetails gst_smokeenc_details = {
"Smoke image encoder",
"Codec/Encoder/Image",
"Encode images in the Smoke format",
"Wim Taymans <wim@fluendo.com>",
};
GST_DEBUG_CATEGORY (smokeenc_debug);
#define GST_CAT_DEFAULT smokeenc_debug
#define SMOKEENC_DEFAULT_MIN_QUALITY 10
#define SMOKEENC_DEFAULT_MAX_QUALITY 85
#define SMOKEENC_DEFAULT_THRESHOLD 3000
#define SMOKEENC_DEFAULT_KEYFRAME 20
/* SmokeEnc signals and args */
enum
{
FRAME_ENCODED,
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_MIN_QUALITY,
ARG_MAX_QUALITY,
ARG_THRESHOLD,
ARG_KEYFRAME
/* FILL ME */
};
static void gst_smokeenc_base_init (gpointer g_class);
static void gst_smokeenc_class_init (GstSmokeEnc * klass);
static void gst_smokeenc_init (GstSmokeEnc * smokeenc);
static void gst_smokeenc_chain (GstPad * pad, GstData * _data);
static GstPadLinkReturn gst_smokeenc_link (GstPad * pad, const GstCaps * caps);
static GstCaps *gst_smokeenc_getcaps (GstPad * pad);
static void gst_smokeenc_resync (GstSmokeEnc * smokeenc);
static void gst_smokeenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_smokeenc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
//static guint gst_smokeenc_signals[LAST_SIGNAL] = { 0 };
GType
gst_smokeenc_get_type (void)
{
static GType smokeenc_type = 0;
if (!smokeenc_type) {
static const GTypeInfo smokeenc_info = {
sizeof (GstSmokeEncClass),
gst_smokeenc_base_init,
NULL,
(GClassInitFunc) gst_smokeenc_class_init,
NULL,
NULL,
sizeof (GstSmokeEnc),
0,
(GInstanceInitFunc) gst_smokeenc_init,
};
smokeenc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstSmokeEnc", &smokeenc_info,
0);
}
return smokeenc_type;
}
static GstStaticPadTemplate gst_smokeenc_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GstStaticPadTemplate gst_smokeenc_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-smoke, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], " "framerate = (double) [ 1, MAX ]")
);
static void
gst_smokeenc_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 (&gst_smokeenc_sink_pad_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_smokeenc_src_pad_template));
gst_element_class_set_details (element_class, &gst_smokeenc_details);
}
static void
gst_smokeenc_class_init (GstSmokeEnc * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (gobject_class, ARG_MIN_QUALITY,
g_param_spec_int ("qmin", "Qmin", "Minimum quality",
0, 100, SMOKEENC_DEFAULT_MIN_QUALITY, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_MAX_QUALITY,
g_param_spec_int ("qmax", "Qmax", "Maximum quality",
0, 100, SMOKEENC_DEFAULT_MAX_QUALITY, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_THRESHOLD,
g_param_spec_int ("threshold", "Threshold", "Motion estimation threshold",
0, 100000000, SMOKEENC_DEFAULT_THRESHOLD, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_KEYFRAME,
g_param_spec_int ("keyframe", "Keyframe",
"Insert keyframe every N frames", 1, 100000,
SMOKEENC_DEFAULT_KEYFRAME, G_PARAM_READWRITE));
gobject_class->set_property = gst_smokeenc_set_property;
gobject_class->get_property = gst_smokeenc_get_property;
GST_DEBUG_CATEGORY_INIT (smokeenc_debug, "smokeenc", 0,
"Smoke encoding element");
}
static void
gst_smokeenc_init (GstSmokeEnc * smokeenc)
{
/* create the sink and src pads */
smokeenc->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_smokeenc_sink_pad_template), "sink");
gst_pad_set_chain_function (smokeenc->sinkpad, gst_smokeenc_chain);
gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);
gst_pad_set_link_function (smokeenc->sinkpad, gst_smokeenc_link);
gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->sinkpad);
smokeenc->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_smokeenc_src_pad_template), "src");
gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);
gst_pad_set_link_function (smokeenc->sinkpad, gst_smokeenc_link);
gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->srcpad);
/* reset the initial video state */
smokeenc->width = 0;
smokeenc->height = 0;
smokeenc->frame = 0;
smokeenc->need_header = TRUE;
gst_smokeenc_resync (smokeenc);
smokeenc->min_quality = SMOKEENC_DEFAULT_MIN_QUALITY;
smokeenc->max_quality = SMOKEENC_DEFAULT_MAX_QUALITY;
smokeenc->threshold = SMOKEENC_DEFAULT_THRESHOLD;
smokeenc->keyframe = SMOKEENC_DEFAULT_KEYFRAME;
}
static GstCaps *
gst_smokeenc_getcaps (GstPad * pad)
{
GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
GstPad *otherpad;
GstCaps *caps;
const char *name;
int i;
GstStructure *structure = NULL;
/* we want to proxy properties like width, height and framerate from the
other end of the element */
otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;
caps = gst_pad_get_allowed_caps (otherpad);
if (pad == smokeenc->srcpad) {
name = "image/x-smoke";
} else {
name = "video/x-raw-yuv";
}
for (i = 0; i < gst_caps_get_size (caps); i++) {
structure = gst_caps_get_structure (caps, i);
gst_structure_set_name (structure, name);
gst_structure_remove_field (structure, "format");
/* ... but for the sink pad, we only do I420 anyway, so add that */
if (pad == smokeenc->sinkpad) {
gst_structure_set (structure, "format", GST_TYPE_FOURCC,
GST_STR_FOURCC ("I420"), NULL);
}
}
return caps;
}
static GstPadLinkReturn
gst_smokeenc_link (GstPad * pad, const GstCaps * caps)
{
GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
GstStructure *structure;
GstPadLinkReturn ret;
GstCaps *othercaps;
GstPad *otherpad;
otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_double (structure, "framerate", &smokeenc->fps);
gst_structure_get_int (structure, "width", &smokeenc->width);
gst_structure_get_int (structure, "height", &smokeenc->height);
othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
gst_caps_set_simple (othercaps,
"width", G_TYPE_INT, smokeenc->width,
"height", G_TYPE_INT, smokeenc->height,
"framerate", G_TYPE_DOUBLE, smokeenc->fps, NULL);
ret = gst_pad_try_set_caps (smokeenc->srcpad, othercaps);
gst_caps_free (othercaps);
if (GST_PAD_LINK_SUCCESSFUL (ret)) {
gst_smokeenc_resync (smokeenc);
}
return ret;
}
static void
gst_smokeenc_resync (GstSmokeEnc * smokeenc)
{
GValue fps = { 0 };
GValue framerate = { 0 };
GST_DEBUG ("gst_smokeenc_resync: resync");
g_value_init (&fps, G_TYPE_DOUBLE);
g_value_init (&framerate, GST_TYPE_FRACTION);
g_value_set_double (&fps, smokeenc->fps);
g_value_transform (&fps, &framerate);
smokeenc->fps_num = gst_value_get_fraction_numerator (&framerate);
smokeenc->fps_denom = gst_value_get_fraction_denominator (&framerate);
smokecodec_encode_new (&smokeenc->info, smokeenc->width, smokeenc->height,
smokeenc->fps_num, smokeenc->fps_denom);
smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
smokeenc->max_quality);
GST_DEBUG ("gst_smokeenc_resync: resync done");
}
static void
gst_smokeenc_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstSmokeEnc *smokeenc;
guchar *data, *outdata;
gulong size;
gint outsize, encsize;
GstBuffer *outbuf;
SmokeCodecFlags flags;
smokeenc = GST_SMOKEENC (GST_OBJECT_PARENT (pad));
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
GST_DEBUG ("gst_smokeenc_chain: got buffer of %ld bytes in '%s'", size,
GST_OBJECT_NAME (smokeenc));
if (smokeenc->need_header) {
outbuf = gst_buffer_new ();
outsize = 256;
outdata = GST_BUFFER_DATA (outbuf) = g_malloc (outsize);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
smokecodec_encode_id (smokeenc->info, outdata, &encsize);
GST_BUFFER_SIZE (outbuf) = encsize;
gst_pad_push (smokeenc->srcpad, GST_DATA (outbuf));
smokeenc->need_header = FALSE;
}
outbuf = gst_buffer_new ();
outsize = smokeenc->width * smokeenc->height * 3;
outdata = GST_BUFFER_DATA (outbuf) = g_malloc (outsize);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) =
smokeenc->fps_denom * GST_SECOND / smokeenc->fps_num;
flags = 0;
if ((smokeenc->frame % smokeenc->keyframe) == 0) {
flags |= SMOKECODEC_KEYFRAME;
}
smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
smokeenc->max_quality);
smokecodec_set_threshold (smokeenc->info, smokeenc->threshold);
smokecodec_encode (smokeenc->info, data, flags, outdata, &encsize);
gst_buffer_unref (buf);
GST_BUFFER_SIZE (outbuf) = encsize;
GST_BUFFER_OFFSET (outbuf) = smokeenc->frame;
GST_BUFFER_OFFSET_END (outbuf) = smokeenc->frame + 1;
gst_pad_push (smokeenc->srcpad, GST_DATA (outbuf));
smokeenc->frame++;
}
static void
gst_smokeenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSmokeEnc *smokeenc;
g_return_if_fail (GST_IS_SMOKEENC (object));
smokeenc = GST_SMOKEENC (object);
switch (prop_id) {
case ARG_MIN_QUALITY:
smokeenc->min_quality = g_value_get_int (value);
break;
case ARG_MAX_QUALITY:
smokeenc->max_quality = g_value_get_int (value);
break;
case ARG_THRESHOLD:
smokeenc->threshold = g_value_get_int (value);
break;
case ARG_KEYFRAME:
smokeenc->keyframe = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_smokeenc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstSmokeEnc *smokeenc;
g_return_if_fail (GST_IS_SMOKEENC (object));
smokeenc = GST_SMOKEENC (object);
switch (prop_id) {
case ARG_MIN_QUALITY:
g_value_set_int (value, smokeenc->min_quality);
break;
case ARG_MAX_QUALITY:
g_value_set_int (value, smokeenc->max_quality);
break;
case ARG_THRESHOLD:
g_value_set_int (value, smokeenc->threshold);
break;
case ARG_KEYFRAME:
g_value_set_int (value, smokeenc->keyframe);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}