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271 lines
7.9 KiB
C
271 lines
7.9 KiB
C
/* GStreamer
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* Copyright (C) 2010 David Schleef <ds@entropywave.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/video/video.h>
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#include "gstrgb2bayer.h"
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#define GST_CAT_DEFAULT gst_rgb2bayer_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static void gst_rgb2bayer_finalize (GObject * object);
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static GstCaps *gst_rgb2bayer_transform_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter);
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static gboolean
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gst_rgb2bayer_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
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gsize * size);
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static gboolean
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gst_rgb2bayer_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps);
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static GstFlowReturn gst_rgb2bayer_transform (GstBaseTransform * trans,
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GstBuffer * inbuf, GstBuffer * outbuf);
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static GstStaticPadTemplate gst_rgb2bayer_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("ARGB"))
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);
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#if 0
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/* do these later */
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static GstStaticPadTemplate gst_rgb2bayer_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
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GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR ";"
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GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ARGB ";"
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GST_VIDEO_CAPS_BGRA ";" GST_VIDEO_CAPS_ABGR)
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);
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#endif
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static GstStaticPadTemplate gst_rgb2bayer_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-bayer,"
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"format=(string){bggr,gbrg,grbg,rggb},"
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"width=[1,MAX],height=[1,MAX]," "framerate=(fraction)[0/1,MAX]")
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);
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/* class initialization */
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#define gst_rgb2bayer_parent_class parent_class
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G_DEFINE_TYPE (GstRGB2Bayer, gst_rgb2bayer, GST_TYPE_BASE_TRANSFORM);
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static void
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gst_rgb2bayer_class_init (GstRGB2BayerClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstBaseTransformClass *base_transform_class =
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GST_BASE_TRANSFORM_CLASS (klass);
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gobject_class->finalize = gst_rgb2bayer_finalize;
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rgb2bayer_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rgb2bayer_sink_template));
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gst_element_class_set_details_simple (element_class,
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"RGB to Bayer converter",
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"Filter/Converter/Video",
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"Converts video/x-raw to video/x-bayer",
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"David Schleef <ds@entropywave.com>");
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base_transform_class->transform_caps =
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GST_DEBUG_FUNCPTR (gst_rgb2bayer_transform_caps);
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base_transform_class->get_unit_size =
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GST_DEBUG_FUNCPTR (gst_rgb2bayer_get_unit_size);
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base_transform_class->set_caps = GST_DEBUG_FUNCPTR (gst_rgb2bayer_set_caps);
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base_transform_class->transform = GST_DEBUG_FUNCPTR (gst_rgb2bayer_transform);
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GST_DEBUG_CATEGORY_INIT (gst_rgb2bayer_debug, "rgb2bayer", 0,
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"rgb2bayer element");
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}
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static void
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gst_rgb2bayer_init (GstRGB2Bayer * rgb2bayer)
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{
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}
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void
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gst_rgb2bayer_finalize (GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstCaps *
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gst_rgb2bayer_transform_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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GstStructure *structure;
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GstStructure *new_structure;
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GstCaps *newcaps;
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const GValue *value;
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GST_DEBUG_OBJECT (trans, "transforming caps (from) %" GST_PTR_FORMAT, caps);
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structure = gst_caps_get_structure (caps, 0);
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if (direction == GST_PAD_SRC) {
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newcaps = gst_caps_new_empty_simple ("video/x-raw");
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} else {
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newcaps = gst_caps_new_empty_simple ("video/x-bayer");
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}
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new_structure = gst_caps_get_structure (newcaps, 0);
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value = gst_structure_get_value (structure, "width");
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gst_structure_set_value (new_structure, "width", value);
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value = gst_structure_get_value (structure, "height");
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gst_structure_set_value (new_structure, "height", value);
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value = gst_structure_get_value (structure, "framerate");
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gst_structure_set_value (new_structure, "framerate", value);
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GST_DEBUG_OBJECT (trans, "transforming caps (into) %" GST_PTR_FORMAT,
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newcaps);
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if (filter) {
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GstCaps *tmpcaps = newcaps;
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newcaps = gst_caps_intersect (newcaps, filter);
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gst_caps_unref (tmpcaps);
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}
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return newcaps;
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}
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static gboolean
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gst_rgb2bayer_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
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gsize * size)
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{
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GstStructure *structure;
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int width;
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int height;
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const char *name;
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structure = gst_caps_get_structure (caps, 0);
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if (gst_structure_get_int (structure, "width", &width) &&
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gst_structure_get_int (structure, "height", &height)) {
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name = gst_structure_get_name (structure);
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/* Our name must be either video/x-bayer video/x-raw */
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if (g_str_equal (name, "video/x-bayer")) {
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*size = width * height;
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return TRUE;
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} else {
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/* For output, calculate according to format */
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*size = width * height * 4;
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return TRUE;
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}
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}
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return FALSE;
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}
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static gboolean
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gst_rgb2bayer_set_caps (GstBaseTransform * trans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstRGB2Bayer *rgb2bayer = GST_RGB_2_BAYER (trans);
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GstStructure *structure;
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const char *format;
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GstVideoInfo info;
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GST_DEBUG ("in caps %" GST_PTR_FORMAT " out caps %" GST_PTR_FORMAT, incaps,
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outcaps);
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if (!gst_video_info_from_caps (&info, incaps))
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return FALSE;
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rgb2bayer->info = info;
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structure = gst_caps_get_structure (outcaps, 0);
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gst_structure_get_int (structure, "width", &rgb2bayer->width);
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gst_structure_get_int (structure, "height", &rgb2bayer->height);
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format = gst_structure_get_string (structure, "format");
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if (g_str_equal (format, "bggr")) {
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rgb2bayer->format = GST_RGB_2_BAYER_FORMAT_BGGR;
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} else if (g_str_equal (format, "gbrg")) {
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rgb2bayer->format = GST_RGB_2_BAYER_FORMAT_GBRG;
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} else if (g_str_equal (format, "grbg")) {
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rgb2bayer->format = GST_RGB_2_BAYER_FORMAT_GRBG;
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} else if (g_str_equal (format, "rggb")) {
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rgb2bayer->format = GST_RGB_2_BAYER_FORMAT_RGGB;
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} else {
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return FALSE;
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}
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return TRUE;
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}
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static GstFlowReturn
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gst_rgb2bayer_transform (GstBaseTransform * trans, GstBuffer * inbuf,
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GstBuffer * outbuf)
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{
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GstRGB2Bayer *rgb2bayer = GST_RGB_2_BAYER (trans);
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GstMapInfo map;
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guint8 *dest;
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guint8 *src;
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int i, j;
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int height = rgb2bayer->height;
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int width = rgb2bayer->width;
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GstVideoFrame frame;
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gst_video_frame_map (&frame, &rgb2bayer->info, inbuf, GST_MAP_READ);
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gst_buffer_map (outbuf, &map, GST_MAP_READ);
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dest = map.data;
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src = GST_VIDEO_FRAME_PLANE_DATA (&frame, 0);
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for (j = 0; j < height; j++) {
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guint8 *dest_line = dest + width * j;
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guint8 *src_line = src + width * 4 * j;
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for (i = 0; i < width; i++) {
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int is_blue = ((j & 1) << 1) | (i & 1);
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if (is_blue == rgb2bayer->format) {
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dest_line[i] = src_line[i * 4 + 3];
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} else if ((is_blue ^ 3) == rgb2bayer->format) {
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dest_line[i] = src_line[i * 4 + 1];
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} else {
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dest_line[i] = src_line[i * 4 + 2];
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}
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}
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}
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gst_buffer_unmap (outbuf, &map);
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gst_video_frame_unmap (&frame);
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return GST_FLOW_OK;
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}
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