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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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426 lines
12 KiB
C
426 lines
12 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-cacasink
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* @title: cacasink
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* @see_also: #GstAASink
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*
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* Displays video as color ascii art.
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*
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* ## Example launch line
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* |[
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* CACA_GEOMETRY=160x60 CACA_FONT=5x7 gst-launch-1.0 filesrc location=test.avi ! decodebin ! videoconvert ! cacasink
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* ]| This pipeline renders a video to ascii art into a separate window using a
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* small font and specifying the ascii resolution.
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* |[
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* CACA_DRIVER=ncurses gst-launch-1.0 filesrc location=test.avi ! decodebin ! videoconvert ! cacasink
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* ]| This pipeline renders a video to ascii art into the current terminal.
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*
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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 <string.h>
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#include "gstcacasink.h"
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#include "gstcacatv.h"
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//#define GST_CACA_DEFAULT_RED_MASK R_MASK_32_REVERSE_INT
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//#define GST_CACA_DEFAULT_GREEN_MASK G_MASK_32_REVERSE_INT
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//#define GST_CACA_DEFAULT_BLUE_MASK B_MASK_32_REVERSE_INT
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/* cacasink signals and args */
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enum
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{
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LAST_SIGNAL
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};
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#define GST_CACA_DEFAULT_SCREEN_WIDTH 80
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#define GST_CACA_DEFAULT_SCREEN_HEIGHT 25
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#define GST_CACA_DEFAULT_DITHER CACA_DITHERING_NONE
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#define GST_CACA_DEFAULT_ANTIALIASING TRUE
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enum
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{
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PROP_0,
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PROP_SCREEN_WIDTH,
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PROP_SCREEN_HEIGHT,
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PROP_DITHER,
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PROP_ANTIALIASING
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};
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static GstStaticPadTemplate sink_template = 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
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("{ RGB, BGR, RGBx, xRGB, BGRx, xBGR, RGB16, RGB15 }"))
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);
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static gboolean gst_cacasink_setcaps (GstBaseSink * pad, GstCaps * caps);
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static void gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end);
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static GstFlowReturn gst_cacasink_render (GstBaseSink * basesink,
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GstBuffer * buffer);
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static void gst_cacasink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_cacasink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_cacasink_change_state (GstElement * element,
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GstStateChange transition);
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#define gst_cacasink_parent_class parent_class
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G_DEFINE_TYPE (GstCACASink, gst_cacasink, GST_TYPE_BASE_SINK);
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#define GST_TYPE_CACADITHER (gst_cacasink_dither_get_type())
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static GType
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gst_cacasink_dither_get_type (void)
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{
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static GType dither_type = 0;
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static const GEnumValue dither_types[] = {
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{CACA_DITHERING_NONE, "No dithering", "none"},
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{CACA_DITHERING_ORDERED2, "Ordered 2x2 Bayer dithering", "2x2"},
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{CACA_DITHERING_ORDERED4, "Ordered 4x4 Bayer dithering", "4x4"},
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{CACA_DITHERING_ORDERED8, "Ordered 8x8 Bayer dithering", "8x8"},
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{CACA_DITHERING_RANDOM, "Random dithering", "random"},
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{0, NULL, NULL},
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};
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if (!dither_type) {
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dither_type = g_enum_register_static ("GstCACASinkDithering", dither_types);
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}
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return dither_type;
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}
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static void
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gst_cacasink_class_init (GstCACASinkClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseSinkClass *gstbasesink_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasesink_class = (GstBaseSinkClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_cacasink_set_property;
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gobject_class->get_property = gst_cacasink_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCREEN_WIDTH,
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g_param_spec_int ("screen-width", "Screen Width",
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"The width of the screen", 0, G_MAXINT, GST_CACA_DEFAULT_SCREEN_WIDTH,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCREEN_HEIGHT,
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g_param_spec_int ("screen-height", "Screen Height",
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"The height of the screen", 0, G_MAXINT,
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GST_CACA_DEFAULT_SCREEN_HEIGHT,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DITHER,
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g_param_spec_enum ("dither", "Dither Type", "Set type of Dither",
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GST_TYPE_CACADITHER, GST_CACA_DEFAULT_DITHER,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ANTIALIASING,
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g_param_spec_boolean ("anti-aliasing", "Anti Aliasing",
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"Enables Anti-Aliasing", GST_CACA_DEFAULT_ANTIALIASING,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state = gst_cacasink_change_state;
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gst_element_class_set_static_metadata (gstelement_class,
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"A colored ASCII art video sink", "Sink/Video",
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"A colored ASCII art videosink", "Zeeshan Ali <zak147@yahoo.com>");
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gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
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gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_cacasink_setcaps);
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gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_cacasink_get_times);
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gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_cacasink_render);
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gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_cacasink_render);
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gst_type_mark_as_plugin_api (GST_TYPE_CACADITHER, 0);
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}
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static void
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gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end)
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{
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*start = GST_BUFFER_TIMESTAMP (buffer);
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*end = *start + GST_BUFFER_DURATION (buffer);
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}
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static gboolean
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gst_cacasink_setcaps (GstBaseSink * basesink, GstCaps * caps)
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{
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GstCACASink *cacasink;
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GstVideoInfo info;
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guint bpp, red_mask, green_mask, blue_mask;
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cacasink = GST_CACASINK (basesink);
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if (!gst_video_info_from_caps (&info, caps))
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goto caps_error;
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switch (GST_VIDEO_INFO_FORMAT (&info)) {
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case GST_VIDEO_FORMAT_RGB:
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case GST_VIDEO_FORMAT_BGR:
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case GST_VIDEO_FORMAT_RGBx:
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case GST_VIDEO_FORMAT_xRGB:
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case GST_VIDEO_FORMAT_BGRx:
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case GST_VIDEO_FORMAT_xBGR:
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bpp = 8 * info.finfo->pixel_stride[0];
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red_mask = 0xff << (8 * info.finfo->poffset[GST_VIDEO_COMP_R]);
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green_mask = 0xff << (8 * info.finfo->poffset[GST_VIDEO_COMP_G]);
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blue_mask = 0xff << (8 * info.finfo->poffset[GST_VIDEO_COMP_B]);
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break;
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case GST_VIDEO_FORMAT_RGB16:
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bpp = 16;
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red_mask = 0xf800;
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green_mask = 0x07e0;
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blue_mask = 0x001f;
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break;
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case GST_VIDEO_FORMAT_RGB15:
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bpp = 16;
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red_mask = 0x7c00;
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green_mask = 0x03e0;
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blue_mask = 0x001f;
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break;
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default:
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goto invalid_format;
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}
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if (cacasink->bitmap) {
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caca_free_bitmap (cacasink->bitmap);
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}
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cacasink->bitmap = caca_create_bitmap (bpp,
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GST_VIDEO_INFO_WIDTH (&info),
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GST_VIDEO_INFO_HEIGHT (&info),
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GST_ROUND_UP_4 (GST_VIDEO_INFO_WIDTH (&info) * bpp / 8),
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red_mask, green_mask, blue_mask, 0);
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if (!cacasink->bitmap)
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goto no_bitmap;
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cacasink->info = info;
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return TRUE;
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/* ERROS */
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caps_error:
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{
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GST_ERROR_OBJECT (cacasink, "error parsing caps");
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return FALSE;
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}
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invalid_format:
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{
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GST_ERROR_OBJECT (cacasink, "invalid format");
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return FALSE;
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}
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no_bitmap:
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{
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GST_ERROR_OBJECT (cacasink, "could not create bitmap");
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return FALSE;
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}
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}
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static void
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gst_cacasink_init (GstCACASink * cacasink)
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{
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cacasink->screen_width = GST_CACA_DEFAULT_SCREEN_WIDTH;
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cacasink->screen_height = GST_CACA_DEFAULT_SCREEN_HEIGHT;
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cacasink->dither = GST_CACA_DEFAULT_DITHER;
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cacasink->antialiasing = GST_CACA_DEFAULT_ANTIALIASING;
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}
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static GstFlowReturn
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gst_cacasink_render (GstBaseSink * basesink, GstBuffer * buffer)
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{
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GstCACASink *cacasink = GST_CACASINK (basesink);
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GstVideoFrame frame;
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GST_DEBUG ("render");
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if (!gst_video_frame_map (&frame, &cacasink->info, buffer, GST_MAP_READ))
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goto invalid_frame;
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caca_clear ();
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caca_draw_bitmap (0, 0, cacasink->screen_width - 1,
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cacasink->screen_height - 1, cacasink->bitmap,
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GST_VIDEO_FRAME_PLANE_DATA (&frame, 0));
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caca_refresh ();
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gst_video_frame_unmap (&frame);
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return GST_FLOW_OK;
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/* ERRORS */
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invalid_frame:
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{
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GST_ERROR_OBJECT (cacasink, "invalid frame received");
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return GST_FLOW_ERROR;
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}
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}
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static void
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gst_cacasink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstCACASink *cacasink;
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g_return_if_fail (GST_IS_CACASINK (object));
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cacasink = GST_CACASINK (object);
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switch (prop_id) {
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case PROP_DITHER:{
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cacasink->dither = g_value_get_enum (value);
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caca_set_dithering (cacasink->dither + CACA_DITHERING_NONE);
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break;
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}
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case PROP_ANTIALIASING:{
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cacasink->antialiasing = g_value_get_boolean (value);
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if (cacasink->antialiasing) {
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caca_set_feature (CACA_ANTIALIASING_MAX);
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} else {
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caca_set_feature (CACA_ANTIALIASING_MIN);
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}
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break;
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}
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default:
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break;
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}
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}
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static void
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gst_cacasink_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstCACASink *cacasink;
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cacasink = GST_CACASINK (object);
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switch (prop_id) {
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case PROP_SCREEN_WIDTH:{
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g_value_set_int (value, cacasink->screen_width);
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break;
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}
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case PROP_SCREEN_HEIGHT:{
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g_value_set_int (value, cacasink->screen_height);
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break;
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}
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case PROP_DITHER:{
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g_value_set_enum (value, cacasink->dither);
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break;
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}
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case PROP_ANTIALIASING:{
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g_value_set_boolean (value, cacasink->antialiasing);
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break;
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}
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default:{
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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}
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static gboolean
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gst_cacasink_open (GstCACASink * cacasink)
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{
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cacasink->bitmap = NULL;
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if (caca_init () < 0)
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goto init_failed;
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cacasink->screen_width = caca_get_width ();
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cacasink->screen_height = caca_get_height ();
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cacasink->antialiasing = TRUE;
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caca_set_feature (CACA_ANTIALIASING_MAX);
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cacasink->dither = 0;
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caca_set_dithering (CACA_DITHERING_NONE);
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return TRUE;
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/* ERRORS */
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init_failed:
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{
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GST_ELEMENT_ERROR (cacasink, RESOURCE, OPEN_WRITE, (NULL),
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("caca_init() failed"));
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return FALSE;
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}
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}
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static void
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gst_cacasink_close (GstCACASink * cacasink)
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{
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if (cacasink->bitmap) {
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caca_free_bitmap (cacasink->bitmap);
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cacasink->bitmap = NULL;
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}
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caca_end ();
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}
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static GstStateChangeReturn
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gst_cacasink_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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if (!gst_cacasink_open (GST_CACASINK (element)))
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return GST_STATE_CHANGE_FAILURE;
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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gst_cacasink_close (GST_CACASINK (element));
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break;
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default:
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break;
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}
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return ret;
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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if (!gst_element_register (plugin, "cacatv", GST_RANK_NONE, GST_TYPE_CACATV))
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return FALSE;
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if (!gst_element_register (plugin, "cacasink", GST_RANK_NONE,
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GST_TYPE_CACASINK))
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return FALSE;
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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cacasink,
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"Colored ASCII Art video sink & filter",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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