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