gstreamer/ext/jpeg/gstsmokeenc.c
2012-11-04 00:07:18 +00:00

509 lines
14 KiB
C

/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-smokeenc
*
* Encodes images in smoke format.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstsmokeenc.h"
#include <gst/video/video.h>
GST_DEBUG_CATEGORY_STATIC (smokeenc_debug);
#define GST_CAT_DEFAULT smokeenc_debug
/* SmokeEnc signals and args */
enum
{
FRAME_ENCODED,
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_PROP_MIN_QUALITY 10
#define DEFAULT_PROP_MAX_QUALITY 85
#define DEFAULT_PROP_THRESHOLD 3000
#define DEFAULT_PROP_KEYFRAME 20
enum
{
PROP_0,
PROP_MIN_QUALITY,
PROP_MAX_QUALITY,
PROP_THRESHOLD,
PROP_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_finalize (GObject * object);
static GstStateChangeReturn
gst_smokeenc_change_state (GstElement * element, GstStateChange transition);
static GstFlowReturn gst_smokeenc_chain (GstPad * pad, GstBuffer * buf);
static GstCaps *gst_smokeenc_getcaps (GstPad * pad);
static gboolean gst_smokeenc_setcaps (GstPad * pad, GstCaps * caps);
static gboolean 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;
GType
gst_smokeenc_get_type (void)
{
static GType smokeenc_type = 0;
if (!smokeenc_type) {
static const GTypeInfo smokeenc_info = {
sizeof (GstSmokeEncClass),
(GBaseInitFunc) 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 = (fraction) [ 0/1, 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_static_metadata (element_class, "Smoke video encoder",
"Codec/Encoder/Video",
"Encode images into the Smoke format", "Wim Taymans <wim@fluendo.com>");
}
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_peek_parent (klass);
gobject_class->finalize = gst_smokeenc_finalize;
gobject_class->set_property = gst_smokeenc_set_property;
gobject_class->get_property = gst_smokeenc_get_property;
g_object_class_install_property (gobject_class, PROP_MIN_QUALITY,
g_param_spec_int ("qmin", "Qmin", "Minimum quality",
0, 100, DEFAULT_PROP_MIN_QUALITY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAX_QUALITY,
g_param_spec_int ("qmax", "Qmax", "Maximum quality",
0, 100, DEFAULT_PROP_MAX_QUALITY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_THRESHOLD,
g_param_spec_int ("threshold", "Threshold", "Motion estimation threshold",
0, 100000000, DEFAULT_PROP_THRESHOLD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_KEYFRAME,
g_param_spec_int ("keyframe", "Keyframe",
"Insert keyframe every N frames", 1, 100000,
DEFAULT_PROP_KEYFRAME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_smokeenc_change_state);
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_static_template (&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_setcaps_function (smokeenc->sinkpad, gst_smokeenc_setcaps);
gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->sinkpad);
smokeenc->srcpad =
gst_pad_new_from_static_template (&gst_smokeenc_src_pad_template, "src");
gst_pad_set_getcaps_function (smokeenc->srcpad, gst_smokeenc_getcaps);
gst_pad_use_fixed_caps (smokeenc->srcpad);
gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->srcpad);
smokeenc->min_quality = DEFAULT_PROP_MIN_QUALITY;
smokeenc->max_quality = DEFAULT_PROP_MAX_QUALITY;
smokeenc->threshold = DEFAULT_PROP_THRESHOLD;
smokeenc->keyframe = DEFAULT_PROP_KEYFRAME;
}
static void
gst_smokeenc_finalize (GObject * object)
{
GstSmokeEnc *enc = GST_SMOKEENC (object);
if (enc->info)
smokecodec_info_free (enc->info);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_smokeenc_getcaps (GstPad * pad)
{
GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
GstPad *otherpad;
GstCaps *result, *caps;
const GstCaps *tcaps;
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;
/* get template caps, we always need this to fiter the peer caps */
tcaps = gst_pad_get_pad_template_caps (otherpad);
/* get any constraints on the peer pad */
caps = gst_pad_peer_get_caps (otherpad);
if (caps == NULL)
caps = gst_caps_copy (tcaps);
else
caps = gst_caps_make_writable (caps);
/* intersect with the template */
result = gst_caps_intersect (caps, tcaps);
gst_caps_unref (caps);
if (pad == smokeenc->srcpad) {
name = "video/x-smoke";
} else {
name = "video/x-raw-yuv";
}
/* we can only copy width, height, framerate from one side to the other */
for (i = 0; i < gst_caps_get_size (result); i++) {
structure = gst_caps_get_structure (result, 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);
}
}
gst_object_unref (smokeenc);
return result;
}
static gboolean
gst_smokeenc_setcaps (GstPad * pad, GstCaps * caps)
{
GstSmokeEnc *smokeenc;
GstStructure *structure;
const GValue *framerate;
gboolean ret;
GstCaps *srccaps;
smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
framerate = gst_structure_get_value (structure, "framerate");
if (framerate) {
smokeenc->fps_num = gst_value_get_fraction_numerator (framerate);
smokeenc->fps_denom = gst_value_get_fraction_denominator (framerate);
} else {
smokeenc->fps_num = 0;
smokeenc->fps_denom = 1;
}
gst_structure_get_int (structure, "width", &smokeenc->width);
gst_structure_get_int (structure, "height", &smokeenc->height);
if ((smokeenc->width & 0x0f) != 0 || (smokeenc->height & 0x0f) != 0)
goto width_or_height_notx16;
if (!gst_smokeenc_resync (smokeenc))
goto init_failed;
srccaps = gst_caps_new_simple ("video/x-smoke",
"width", G_TYPE_INT, smokeenc->width,
"height", G_TYPE_INT, smokeenc->height,
"framerate", GST_TYPE_FRACTION, smokeenc->fps_num, smokeenc->fps_denom,
NULL);
ret = gst_pad_set_caps (smokeenc->srcpad, srccaps);
gst_caps_unref (srccaps);
gst_object_unref (smokeenc);
return ret;
width_or_height_notx16:
{
GST_WARNING_OBJECT (smokeenc, "width and height must be multiples of 16"
", %dx%d not allowed", smokeenc->width, smokeenc->height);
gst_object_unref (smokeenc);
return FALSE;
}
init_failed:
{
GST_WARNING_OBJECT (smokeenc, "could not init decoder");
gst_object_unref (smokeenc);
return FALSE;
}
}
static gboolean
gst_smokeenc_resync (GstSmokeEnc * smokeenc)
{
int ret;
GST_DEBUG ("resync: %dx%d@%d/%dfps", smokeenc->width, smokeenc->height,
smokeenc->fps_num, smokeenc->fps_denom);
if (smokeenc->info)
smokecodec_info_free (smokeenc->info);
ret = smokecodec_encode_new (&smokeenc->info, smokeenc->width,
smokeenc->height, smokeenc->fps_num, smokeenc->fps_denom);
if (ret != SMOKECODEC_OK)
goto init_failed;
smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
smokeenc->max_quality);
GST_DEBUG ("resync done");
return TRUE;
/* ERRORS */
init_failed:
{
GST_WARNING_OBJECT (smokeenc, "smokecodec_encode_new() failed: %d", ret);
return FALSE;
}
}
static GstFlowReturn
gst_smokeenc_chain (GstPad * pad, GstBuffer * buf)
{
GstSmokeEnc *smokeenc;
guchar *data, *outdata;
gulong size;
gint outsize;
guint encsize;
GstBuffer *outbuf;
SmokeCodecFlags flags;
GstFlowReturn ret;
smokeenc = GST_SMOKEENC (GST_OBJECT_PARENT (pad));
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
GST_LOG_OBJECT (smokeenc, "got buffer of %lu bytes", size);
if (smokeenc->need_header) {
outbuf = gst_buffer_new_and_alloc (256);
outdata = GST_BUFFER_DATA (outbuf);
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_buffer_set_caps (outbuf, GST_PAD_CAPS (smokeenc->srcpad));
ret = gst_pad_push (smokeenc->srcpad, outbuf);
if (ret != GST_FLOW_OK)
goto done;
smokeenc->need_header = FALSE;
}
encsize = outsize = smokeenc->width * smokeenc->height * 3;
outbuf = gst_buffer_new_and_alloc (outsize);
outdata = GST_BUFFER_DATA (outbuf);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale_int (GST_SECOND, smokeenc->fps_denom,
smokeenc->fps_num);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (smokeenc->srcpad));
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;
ret = gst_pad_push (smokeenc->srcpad, outbuf);
smokeenc->frame++;
done:
return ret;
}
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 PROP_MIN_QUALITY:
smokeenc->min_quality = g_value_get_int (value);
break;
case PROP_MAX_QUALITY:
smokeenc->max_quality = g_value_get_int (value);
break;
case PROP_THRESHOLD:
smokeenc->threshold = g_value_get_int (value);
break;
case PROP_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 PROP_MIN_QUALITY:
g_value_set_int (value, smokeenc->min_quality);
break;
case PROP_MAX_QUALITY:
g_value_set_int (value, smokeenc->max_quality);
break;
case PROP_THRESHOLD:
g_value_set_int (value, smokeenc->threshold);
break;
case PROP_KEYFRAME:
g_value_set_int (value, smokeenc->keyframe);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_smokeenc_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstSmokeEnc *enc;
enc = GST_SMOKEENC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* reset the initial video state */
enc->width = 0;
enc->height = 0;
enc->frame = 0;
enc->need_header = TRUE;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
default:
break;
}
return ret;
}