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gstreamer/ext/aalib/gstaatv.c
Eric Marks d6961235e8 aasink & cacasink: add filter aatv & cacatv 
Add transform filter capabilities to aasink and cacasink in the form of new elements aatv and cacatv.
2019-12-28 23:01:19 +00:00

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/* GStreamer
* Copyright (C) <2019> Eric Marks <bigmarkslp@gmail.com>
*
* 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-aatv
* @see_also: #GstAASink
*
* Transforms video into ascii art.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 videotestsrc ! aatv ! videoconvert ! autovideosink
* ]| This pipeline shows the effect of aatv on a test stream.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstaatv.h"
#include <string.h>
#include <stdlib.h>
#define PROP_AATV_COLOR_TEXT_DEFAULT 0xffffffff /* White */
#define PROP_AATV_COLOR_BACKGROUND_DEFAULT 0xff000000 /* Black */
#define PROP_AATV_COLOR_RAIN_DEFAULT 0xff00ff00 /* Green */
#define PROP_AATV_RAIN_MODE_DEFAULT GST_RAIN_OFF
#define PROP_BRIGHTNESS_TARGET_MIN_DEFAULT 0.3
#define PROP_BRIGHTNESS_TARGET_MAX_DEFAULT 0.4
#define PROP_RAIN_SPAWN_DEFAULT 0.2
#define PROP_RAIN_DELAY_MIN_DEFAULT 0
#define PROP_RAIN_DELAY_MAX_DEFAULT 3
#define PROP_RAIN_LENGTH_MIN_DEFAULT 4
#define PROP_RAIN_LENGTH_MAX_DEFAULT 30
/* aatv signals and args */
enum
{
LAST_SIGNAL
};
#define CHECK_BIT(var,pos) ((var) & (1<<(pos)))
enum
{
PROP_0,
PROP_WIDTH,
PROP_HEIGHT,
PROP_DITHER,
PROP_FONT,
PROP_CONTRAST,
PROP_GAMMA,
PROP_RANDOMVAL,
PROP_BRIGHTNESS_AUTO,
PROP_BRIGHTNESS_ACTUAL,
PROP_BRIGHTNESS,
PROP_BRIGHTNESS_TARGET_MIN,
PROP_BRIGHTNESS_TARGET_MAX,
PROP_COLOR_BACKGROUND,
PROP_COLOR_TEXT,
PROP_COLOR_TEXT_BOLD,
PROP_COLOR_TEXT_NORMAL,
PROP_COLOR_TEXT_DIM,
PROP_COLOR_RAIN,
PROP_COLOR_RAIN_BOLD,
PROP_COLOR_RAIN_NORMAL,
PROP_COLOR_RAIN_DIM,
PROP_RAIN_MODE,
PROP_RAIN_SPAWN_RATE,
PROP_RAIN_DELAY_MIN,
PROP_RAIN_DELAY_MAX,
PROP_RAIN_LENGTH_MIN,
PROP_RAIN_LENGTH_MAX
};
static GstStaticPadTemplate sink_template_tv = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ I420 }"))
);
static GstStaticPadTemplate src_template_tv = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBA }"))
);
static void gst_aatv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_aatv_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
#define GST_TYPE_AATV_RAIN_MODE (gst_aatv_rain_mode_get_type())
static GType
gst_aatv_rain_mode_get_type (void)
{
static GType rain_mode = 0;
static const GEnumValue rain_modes[] = {
{GST_RAIN_OFF, "No Rain", "none"},
{GST_RAIN_DOWN, "Rain Down", "down"},
{GST_RAIN_UP, "Rain Up", "up"},
{GST_RAIN_LEFT, "Rain Left", "left"},
{GST_RAIN_RIGHT, "Rain Right", "right"},
{0, NULL, NULL},
};
if (!rain_mode) {
rain_mode = g_enum_register_static ("GstAATvRainModes", rain_modes);
}
return rain_mode;
}
#define gst_aatv_parent_class parent_class
G_DEFINE_TYPE (GstAATv, gst_aatv, GST_TYPE_VIDEO_FILTER);
static void
gst_aatv_scale (GstAATv * aatv, guchar * src, guchar * dest,
gint sw, gint sh, gint ss, gint dw, gint dh)
{
gint ypos, yinc, y;
gint xpos, xinc, x;
g_return_if_fail ((dw != 0) && (dh != 0));
ypos = 0x10000;
yinc = (sh << 16) / dh;
xinc = (sw << 16) / dw;
for (y = dh; y; y--) {
while (ypos > 0x10000) {
ypos -= 0x10000;
src += ss;
}
xpos = 0x10000;
{
guchar *destp = dest;
guchar *srcp = src;
for (x = dw; x; x--) {
while (xpos >= 0x10000L) {
srcp++;
xpos -= 0x10000L;
}
*destp++ = *srcp;
xpos += xinc;
}
}
dest += dw;
ypos += yinc;
}
}
static void
gst_aatv_rain (GstAATv * aatv)
{
gint i;
gboolean obstructed;
GstAATvDroplet *raindrops = aatv->raindrops;
for (i = 0; i < aatv->rain_width; i++) {
if (raindrops[i].enabled == FALSE) {
if (g_random_double () < aatv->rain_spawn_rate) {
obstructed = FALSE;
/* Don't let adjacent lines be enabled at the same time. */
if (i > 0)
if (raindrops[i - 1].enabled == TRUE)
if (raindrops[i - 1].location - raindrops[i - 1].length <
aatv->rain_height / 4)
obstructed = TRUE;
if (i < aatv->rain_width)
if (raindrops[i + 1].enabled == TRUE)
if (raindrops[i + 1].location - raindrops[i + 1].length <
aatv->rain_height / 4)
obstructed = TRUE;
if (obstructed == FALSE) {
raindrops[i].location = 0;
raindrops[i].length =
g_random_int_range (aatv->rain_length_min, aatv->rain_length_max);
raindrops[i].delay =
g_random_int_range (aatv->rain_delay_min, aatv->rain_delay_max);
raindrops[i].delay_counter = 0;
raindrops[i].enabled = TRUE;
}
}
} else {
raindrops[i].delay_counter++;
if (raindrops[i].delay_counter > raindrops[i].delay) {
raindrops[i].delay_counter = 0;
raindrops[i].location++;
}
if (raindrops[i].location - raindrops[i].length > aatv->rain_height) {
raindrops[i].enabled = FALSE;
}
}
}
}
static void
gst_aatv_render (GstAATv * aatv, gint32 * dest)
{
gint x, y;
guint font_x, font_y;
guint background_pixels = 0;
guint foreground_pixels = 0;
guint char_index = 0;
guint dest_index = 0;
gchar input_letter, input_glyph, attribute;
gboolean rain_pixel;
GstAATvDroplet *raindrops = aatv->raindrops;
const guchar *font_base_address = aa_currentfont (aatv->context)->data;
guint font_height = aa_currentfont (aatv->context)->height;
/* loop through the canvas height */
for (y = 0; y < aa_scrheight (aatv->context); y++) {
/* loop through the height of a character's font */
for (font_y = 0; font_y < font_height; font_y++) {
/* loop through the canvas width */
for (x = 0; x < aa_scrwidth (aatv->context); x++) {
/* which char are we working on */
char_index = x + y * aa_scrwidth (aatv->context);
/* lookup what character we need to render */
input_letter = aa_text (aatv->context)[char_index];
/* check for special attributes like bold or dimmed */
attribute = aa_attrs (aatv->context)[char_index];
/* look that character up in the font glyph table */
input_glyph = font_base_address[input_letter * font_height + font_y];
/* check if we need to re-color this character for rain effect */
rain_pixel = FALSE;
if (aatv->rain_mode == GST_RAIN_DOWN) {
if (raindrops[x].enabled)
if (y <= raindrops[x].location)
if (y >= raindrops[x].location - raindrops[x].length)
rain_pixel = TRUE;
} else if (aatv->rain_mode == GST_RAIN_UP) {
if (raindrops[x].enabled)
if (aatv->rain_height - y <= raindrops[x].location)
if (aatv->rain_height - y >=
raindrops[x].location - raindrops[x].length)
rain_pixel = TRUE;
} else if (aatv->rain_mode == GST_RAIN_LEFT) {
if (raindrops[y].enabled)
if (x <= raindrops[y].location)
if (x >= raindrops[y].location - raindrops[y].length)
rain_pixel = TRUE;
} else if (aatv->rain_mode == GST_RAIN_RIGHT) {
if (raindrops[y].enabled)
if (aatv->rain_height - x <= raindrops[y].location)
if (aatv->rain_height - x >=
raindrops[y].location - raindrops[y].length)
rain_pixel = TRUE;
}
/* loop through the width of a character's font (always 8 pixels wide) */
for (font_x = 0; font_x < 8; font_x++) {
guint32 *pixel_argb;
if (CHECK_BIT (input_glyph, font_x)) {
if (attribute == AA_DIM) {
if (rain_pixel)
pixel_argb = &aatv->color_rain_dim;
else
pixel_argb = &aatv->color_text_dim;
} else if (attribute == AA_BOLD) {
if (rain_pixel)
pixel_argb = &aatv->color_rain_bold;
else
pixel_argb = &aatv->color_text_bold;
} else {
if (rain_pixel)
pixel_argb = &aatv->color_rain_normal;
else
pixel_argb = &aatv->color_text_normal;
}
foreground_pixels++;
} else {
pixel_argb = &aatv->color_background;
background_pixels++;
}
dest[dest_index++] = *pixel_argb;
}
}
}
}
aatv->lit_percentage =
0.2 * (aatv->lit_percentage) +
0.8 * (float) foreground_pixels / background_pixels;
if (aatv->auto_brightness) {
if (aatv->lit_percentage > aatv->brightness_target_max)
if (aatv->ascii_parms.bright > -254)
aatv->ascii_parms.bright--;
if (aatv->lit_percentage < aatv->brightness_target_min)
if (aatv->ascii_parms.bright < 254)
aatv->ascii_parms.bright++;
}
}
static GstFlowReturn
gst_aatv_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame,
GstVideoFrame * out_frame)
{
GstAATv *aatv = GST_AATV (vfilter);
if (aatv->rain_mode != GST_RAIN_OFF)
gst_aatv_rain (aatv);
GST_OBJECT_LOCK (aatv);
gst_aatv_scale (aatv, GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0), /* src */
aa_image (aatv->context), /* dest */
GST_VIDEO_FRAME_WIDTH (in_frame), /* sw */
GST_VIDEO_FRAME_HEIGHT (in_frame), /* sh */
GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0), /* ss */
aa_imgwidth (aatv->context), /* dw */
aa_imgheight (aatv->context)); /* dh */
aa_render (aatv->context, &aatv->ascii_parms, 0, 0,
aa_imgwidth (aatv->context), aa_imgheight (aatv->context));
gst_aatv_render (aatv, GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0));
GST_OBJECT_UNLOCK (aatv);
return GST_FLOW_OK;
}
#define GST_TYPE_AADITHER (gst_aatv_dither_get_type())
static GType
gst_aatv_dither_get_type (void)
{
static GType dither_type = 0;
if (!dither_type) {
GEnumValue *ditherers;
gint n_ditherers;
gint i;
for (n_ditherers = 0; aa_dithernames[n_ditherers]; n_ditherers++) {
/* count number of ditherers */
}
ditherers = g_new0 (GEnumValue, n_ditherers + 1);
for (i = 0; i < n_ditherers; i++) {
ditherers[i].value = i;
ditherers[i].value_name = g_strdup (aa_dithernames[i]);
ditherers[i].value_nick =
g_strdelimit (g_strdup (aa_dithernames[i]), " _", '-');
}
ditherers[i].value = 0;
ditherers[i].value_name = NULL;
ditherers[i].value_nick = NULL;
dither_type = g_enum_register_static ("GstAATvDitherers", ditherers);
}
return dither_type;
}
#define GST_TYPE_AAFONT (gst_aatv_font_get_type())
static GType
gst_aatv_font_get_type (void)
{
static GType font_type = 0;
if (!font_type) {
GEnumValue *fonts;
gint n_fonts;
gint i;
for (n_fonts = 0; aa_fonts[n_fonts]; n_fonts++) {
/* count number of fonts */
}
fonts = g_new0 (GEnumValue, n_fonts + 1);
for (i = 0; i < n_fonts; i++) {
fonts[i].value = i;
fonts[i].value_name = g_strdup (aa_fonts[i]->shortname);
fonts[i].value_nick =
g_strdelimit (g_strdup (aa_fonts[i]->name), " _", '-');
}
fonts[i].value = 0;
fonts[i].value_name = NULL;
fonts[i].value_nick = NULL;
font_type = g_enum_register_static ("GstAATvFonts", fonts);
}
return font_type;
}
/* use a custom transform_caps */
static GstCaps *
gst_aatv_transform_caps (GstBaseTransform * trans, GstPadDirection direction,
GstCaps * caps, GstCaps * filter)
{
GstCaps *ret;
GstAATv *aatv = GST_AATV (trans);
GValue formats = G_VALUE_INIT;
GValue value = G_VALUE_INIT;
GValue src_width = G_VALUE_INIT;
GValue src_height = G_VALUE_INIT;
if (direction == GST_PAD_SINK) {
ret = gst_caps_copy (caps);
g_value_init (&src_width, G_TYPE_INT);
g_value_init (&src_height, G_TYPE_INT);
/* calculate output resolution from canvas size and font size */
g_value_set_int (&src_width, aa_defparams.width * 8);
g_value_set_int (&src_height,
aa_defparams.height * aa_currentfont (aatv->context)->height);
gst_caps_set_value (ret, "width", &src_width);
gst_caps_set_value (ret, "height", &src_height);
/* force RGBA output format */
g_value_init (&formats, GST_TYPE_LIST);
g_value_init (&value, G_TYPE_STRING);
g_value_set_string (&value, "RGBA");
gst_value_list_append_value (&formats, &value);
gst_caps_set_value (ret, "format", &formats);
} else {
ret = gst_static_pad_template_get_caps (&sink_template_tv);
}
return ret;
}
static void
gst_aatv_finalize (GObject * object)
{
GstAATv *aatv = GST_AATV (object);
free (aatv->raindrops);
if (aatv->context != NULL)
aa_close (aatv->context);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_aatv_class_init (GstAATvClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstVideoFilterClass *videofilter_class;
GstBaseTransformClass *transform_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
videofilter_class = (GstVideoFilterClass *) klass;
transform_class = (GstBaseTransformClass *) klass;
gobject_class->set_property = gst_aatv_set_property;
gobject_class->get_property = gst_aatv_get_property;
gobject_class->finalize = gst_aatv_finalize;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WIDTH,
g_param_spec_int ("width", "width", "Width of the ASCII canvas", 0,
G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HEIGHT,
g_param_spec_int ("height", "height", "Height of the ASCII canvas", 0,
G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DITHER,
g_param_spec_enum ("dither", "dither",
"Add noise to more closely approximate gray levels.",
GST_TYPE_AADITHER, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FONT,
g_param_spec_enum ("font", "font", "AAlib Font", GST_TYPE_AAFONT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR_TEXT,
g_param_spec_uint ("color-text", "color-text",
"Automatically sets color-test-bold, color-text-normal, and color-text-dim with progressively dimmer values (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR_TEXT_BOLD,
g_param_spec_uint ("color-text-bold", "color-text-bold",
"Sets the brightest color to use for foreground ASCII text (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_COLOR_TEXT_NORMAL, g_param_spec_uint ("color-text-normal",
"color-text-normal",
"Sets the normal brightness color to use for foreground ASCII text (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR_TEXT_DIM,
g_param_spec_uint ("color-text-dim", "color-text-dim",
"Sets the dimmest brightness color to use for foreground ASCII text (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_COLOR_BACKGROUND, g_param_spec_uint ("color-background",
"color-background",
"Color to use as the background for the ASCII text (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BRIGHTNESS,
g_param_spec_int ("brightness", "brightness", "Brightness", -255,
255, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BRIGHTNESS_AUTO,
g_param_spec_boolean ("brightness-auto", "brightness-auto",
"Automatically adjust brightness based on the previous frame's foreground pixel fill percentage",
TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_BRIGHTNESS_ACTUAL, g_param_spec_float ("brightness-actual",
"brightness-actual",
"Actual calculated foreground pixel fill percentage", 0.0, 1.0, 0.0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_BRIGHTNESS_TARGET_MIN, g_param_spec_float ("brightness-min",
"brightness-min",
"Minimum target foreground pixel fill percentage for automatic brightness control",
0.0, 1.0, 0.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RAIN_SPAWN_RATE,
g_param_spec_float ("rain-spawn-rate", "rain-spawn-rate",
"Percentage chance for a raindrop to spawn", 0.0, 1.0, 0.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_BRIGHTNESS_TARGET_MAX, g_param_spec_float ("brightness-max",
"brightness-max",
"Maximum target foreground pixel fill percentage for automatic brightness control",
0.0, 1.0, 0.0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CONTRAST,
g_param_spec_int ("contrast", "contrast", "Contrast", 0, G_MAXUINT8,
0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_GAMMA,
g_param_spec_float ("gamma", "gamma", "Gamma correction", 0.0, 5.0, 1.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RANDOMVAL,
g_param_spec_int ("randomval", "randomval",
"Adds a random value in the range (-randomval/2,ranomval/2) to each pixel during rendering",
0, 255, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RAIN_DELAY_MIN,
g_param_spec_int ("rain-delay-min", "rain-delay-min",
"Minimum frame delay between rain motion", 0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RAIN_DELAY_MAX,
g_param_spec_int ("rain-delay-max", "rain-delay-max",
"Maximum frame delay between rain motion", 0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RAIN_LENGTH_MIN,
g_param_spec_int ("rain-length-min", "rain-length-min",
"Minimum length of a rain", 0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RAIN_LENGTH_MAX,
g_param_spec_int ("rain-length-max", "rain-length-max",
"Maximum length of a rain", 0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RAIN_MODE,
g_param_spec_enum ("rain-mode", "rain-mode",
"Set the direction of raindrops", GST_TYPE_AATV_RAIN_MODE, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR_RAIN,
g_param_spec_uint ("color-rain", "color-rain",
"Automatically sets color-rain-bold, color-rain-normal, and color-rain-dim with progressively dimmer values (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR_RAIN_BOLD,
g_param_spec_uint ("color-rain-bold", "color-rain-bold",
"Sets the brightest color to use for foreground ASCII text rain overlays (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_COLOR_RAIN_NORMAL, g_param_spec_uint ("color-rain-normal",
"color-rain-normal",
"Sets the normal brightness color to use for foreground ASCII text rain overlays (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR_RAIN_DIM,
g_param_spec_uint ("color-rain-dim", "color-rain-dim",
"Sets the dimmest brightness color to use for foreground ASCII text rain overlays (big-endian ARGB).",
0, G_MAXUINT32, 0,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_static_pad_template (gstelement_class,
&sink_template_tv);
gst_element_class_add_static_pad_template (gstelement_class,
&src_template_tv);
gst_element_class_set_static_metadata (gstelement_class,
"aaTV effect", "Filter/Effect/Video",
"ASCII art effect", "Eric Marks <bigmarkslp@gmail.com>");
transform_class->transform_caps = GST_DEBUG_FUNCPTR (gst_aatv_transform_caps);
videofilter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_aatv_transform_frame);
}
static void
gst_aatv_rain_init (GstAATv * aatv)
{
switch (aatv->rain_mode) {
case GST_RAIN_DOWN:
case GST_RAIN_UP:
aatv->rain_width = aa_defparams.width;
aatv->rain_height = aa_defparams.height;
break;
case GST_RAIN_LEFT:
case GST_RAIN_RIGHT:
aatv->rain_width = aa_defparams.height;
aatv->rain_height = aa_defparams.width;
break;
case GST_RAIN_OFF:
aatv->rain_width = 0;
aatv->rain_height = 0;
}
if (aatv->context != NULL)
aa_close (aatv->context);
aatv->context = aa_init (&mem_d, &aa_defparams, NULL);
aa_setfont (aatv->context, aa_fonts[0]);
aatv->raindrops =
realloc (aatv->raindrops,
aatv->rain_width * sizeof (struct _GstAATvDroplet));
for (gint i = 0; i < aatv->rain_width; i++)
aatv->raindrops[i].enabled = FALSE;
}
static guint32
gst_aatv_set_color (guint32 input_color, guint8 dim)
{
guint8 a = ((input_color >> 24) & 0xff);
guint8 b = ((input_color >> 16) & 0xff) >> dim;
guint8 g = ((input_color >> 8) & 0xff) >> dim;
guint8 r = ((input_color >> 0) & 0xff) >> dim;
return ((a << 24) | (b << 16) | (g << 8) | (r << 0));
}
static void
gst_aatv_set_color_rain (GstAATv * aatv, guint input_color)
{
aatv->color_rain = input_color;
aatv->color_rain_bold = gst_aatv_set_color (input_color, 0);
aatv->color_rain_normal = gst_aatv_set_color (aatv->color_rain_bold, 1);
aatv->color_rain_dim = gst_aatv_set_color (aatv->color_rain_normal, 1);
}
static void
gst_aatv_set_color_text (GstAATv * aatv, guint input_color)
{
aatv->color_text = input_color;
aatv->color_text_bold = gst_aatv_set_color (input_color, 0);
aatv->color_text_normal = gst_aatv_set_color (aatv->color_text_bold, 1);
aatv->color_text_dim = gst_aatv_set_color (aatv->color_text_normal, 1);
}
static void
gst_aatv_init (GstAATv * aatv)
{
aa_defparams.width = 80;
aa_defparams.height = 24;
aatv->ascii_parms.bright = 0;
aatv->ascii_parms.contrast = 0;
aatv->ascii_parms.gamma = 1.0;
aatv->ascii_parms.dither = 0;
aatv->ascii_parms.inversion = 0;
aatv->ascii_parms.randomval = 0;
aatv->color_background =
gst_aatv_set_color (PROP_AATV_COLOR_BACKGROUND_DEFAULT, 0);
gst_aatv_set_color_rain (aatv, PROP_AATV_COLOR_RAIN_DEFAULT);
gst_aatv_set_color_text (aatv, PROP_AATV_COLOR_TEXT_DEFAULT);
aatv->rain_mode = PROP_AATV_RAIN_MODE_DEFAULT;
gst_aatv_rain_init (aatv);
aatv->rain_spawn_rate = PROP_RAIN_SPAWN_DEFAULT;
aatv->auto_brightness = TRUE;
aatv->brightness_target_min = PROP_BRIGHTNESS_TARGET_MIN_DEFAULT;
aatv->brightness_target_max = PROP_BRIGHTNESS_TARGET_MAX_DEFAULT;
aatv->lit_percentage =
(PROP_BRIGHTNESS_TARGET_MIN_DEFAULT +
PROP_BRIGHTNESS_TARGET_MAX_DEFAULT) / 2;
aatv->rain_length_min = PROP_RAIN_LENGTH_MIN_DEFAULT;
aatv->rain_length_max = PROP_RAIN_LENGTH_MAX_DEFAULT;
aatv->rain_delay_min = PROP_RAIN_DELAY_MIN_DEFAULT;
aatv->rain_delay_max = PROP_RAIN_DELAY_MAX_DEFAULT;
}
static void
gst_aatv_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstAATv *aatv = GST_AATV (object);
switch (prop_id) {
case PROP_WIDTH:{
aa_defparams.width = g_value_get_int (value);
/* recalculate output resolution based on new width */
gst_aatv_rain_init (aatv);
gst_pad_mark_reconfigure (GST_BASE_TRANSFORM_SRC_PAD (object));
break;
}
case PROP_HEIGHT:{
aa_defparams.height = g_value_get_int (value);
/* recalculate output resolution based on new height */
gst_aatv_rain_init (aatv);
gst_pad_mark_reconfigure (GST_BASE_TRANSFORM_SRC_PAD (object));
break;
}
case PROP_DITHER:{
aatv->ascii_parms.dither = g_value_get_enum (value);
break;
}
case PROP_FONT:{
aa_setfont (aatv->context, aa_fonts[g_value_get_enum (value)]);
/* recalculate output resolution based on new font */
gst_pad_mark_reconfigure (GST_BASE_TRANSFORM_SRC_PAD (object));
break;
}
case PROP_BRIGHTNESS:{
aatv->ascii_parms.bright = g_value_get_int (value);
break;
}
case PROP_CONTRAST:{
aatv->ascii_parms.contrast = g_value_get_int (value);
break;
}
case PROP_GAMMA:{
aatv->ascii_parms.gamma = g_value_get_float (value);
break;
}
case PROP_BRIGHTNESS_TARGET_MIN:{
if (g_value_get_float (value) <= aatv->brightness_target_max)
aatv->brightness_target_min = g_value_get_float (value);
break;
}
case PROP_BRIGHTNESS_TARGET_MAX:{
if (g_value_get_float (value) >= aatv->brightness_target_min)
aatv->brightness_target_max = g_value_get_float (value);
break;
}
case PROP_RAIN_SPAWN_RATE:{
aatv->rain_spawn_rate = g_value_get_float (value);
break;
}
case PROP_COLOR_TEXT:{
aatv->color_text = g_value_get_uint (value);
gst_aatv_set_color_text (aatv, aatv->color_text);
break;
}
case PROP_COLOR_TEXT_BOLD:{
aatv->color_text_bold = gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_COLOR_TEXT_NORMAL:{
aatv->color_text_normal =
gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_COLOR_TEXT_DIM:{
aatv->color_text_dim = gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_COLOR_BACKGROUND:{
aatv->color_background = gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_COLOR_RAIN:{
aatv->color_rain = g_value_get_uint (value);
gst_aatv_set_color_rain (aatv, aatv->color_rain);
break;
}
case PROP_COLOR_RAIN_BOLD:{
aatv->color_rain_bold = gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_COLOR_RAIN_NORMAL:{
aatv->color_rain_normal =
gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_COLOR_RAIN_DIM:{
aatv->color_rain_dim = gst_aatv_set_color (g_value_get_uint (value), 0);
break;
}
case PROP_BRIGHTNESS_AUTO:{
aatv->auto_brightness = g_value_get_boolean (value);
break;
}
case PROP_RANDOMVAL:{
aatv->ascii_parms.randomval = g_value_get_int (value);
break;
}
case PROP_RAIN_DELAY_MIN:{
if (g_value_get_float (value) <= aatv->rain_delay_max)
aatv->rain_delay_min = g_value_get_int (value);
break;
}
case PROP_RAIN_DELAY_MAX:{
if (g_value_get_float (value) >= aatv->rain_delay_min)
aatv->rain_delay_max = g_value_get_int (value);
break;
}
case PROP_RAIN_LENGTH_MIN:{
if (g_value_get_float (value) <= aatv->rain_length_max)
aatv->rain_length_min = g_value_get_int (value);
break;
}
case PROP_RAIN_LENGTH_MAX:{
if (g_value_get_float (value) >= aatv->rain_length_min)
aatv->rain_length_max = g_value_get_int (value);
break;
}
case PROP_RAIN_MODE:{
aatv->rain_mode = g_value_get_enum (value);
break;
}
default:
break;
}
}
static void
gst_aatv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAATv *aatv = GST_AATV (object);
switch (prop_id) {
case PROP_BRIGHTNESS_ACTUAL:{
g_value_set_float (value, aatv->lit_percentage);
break;
}
case PROP_WIDTH:{
g_value_set_int (value, aa_defparams.width);
break;
}
case PROP_HEIGHT:{
g_value_set_int (value, aa_defparams.height);
break;
}
case PROP_DITHER:{
g_value_set_enum (value, aatv->ascii_parms.dither);
break;
}
case PROP_FONT:{
g_value_set_enum (value, aatv->ascii_parms.dither);
break;
}
case PROP_BRIGHTNESS:{
g_value_set_int (value, aatv->ascii_parms.bright);
break;
}
case PROP_BRIGHTNESS_AUTO:{
g_value_set_boolean (value, aatv->auto_brightness);
break;
}
case PROP_CONTRAST:{
g_value_set_int (value, aatv->ascii_parms.contrast);
break;
}
case PROP_GAMMA:{
g_value_set_float (value, aatv->ascii_parms.gamma);
break;
}
case PROP_RAIN_SPAWN_RATE:{
g_value_set_float (value, aatv->rain_spawn_rate);
break;
}
case PROP_BRIGHTNESS_TARGET_MIN:{
g_value_set_float (value, aatv->brightness_target_min);
break;
}
case PROP_BRIGHTNESS_TARGET_MAX:{
g_value_set_float (value, aatv->brightness_target_max);
break;
}
case PROP_COLOR_TEXT:{
g_value_set_uint (value, aatv->color_text);
break;
}
case PROP_COLOR_TEXT_BOLD:{
g_value_set_uint (value, aatv->color_text_bold);
break;
}
case PROP_COLOR_TEXT_NORMAL:{
g_value_set_uint (value, aatv->color_text_normal);
break;
}
case PROP_COLOR_TEXT_DIM:{
g_value_set_uint (value, aatv->color_text_dim);
break;
}
case PROP_COLOR_BACKGROUND:{
g_value_set_uint (value, aatv->color_background);
break;
}
case PROP_COLOR_RAIN:{
g_value_set_uint (value, aatv->color_rain);
break;
}
case PROP_COLOR_RAIN_BOLD:{
g_value_set_uint (value, aatv->color_rain_bold);
break;
}
case PROP_COLOR_RAIN_NORMAL:{
g_value_set_uint (value, aatv->color_rain_normal);
break;
}
case PROP_COLOR_RAIN_DIM:{
g_value_set_uint (value, aatv->color_rain_dim);
break;
}
case PROP_RANDOMVAL:{
g_value_set_int (value, aatv->ascii_parms.randomval);
break;
}
case PROP_RAIN_MODE:{
g_value_set_enum (value, aatv->rain_mode);
break;
}
case PROP_RAIN_DELAY_MIN:{
g_value_set_int (value, aatv->rain_delay_min);
break;
}
case PROP_RAIN_DELAY_MAX:{
g_value_set_int (value, aatv->rain_delay_max);
break;
}
case PROP_RAIN_LENGTH_MIN:{
g_value_set_int (value, aatv->rain_length_min);
break;
}
case PROP_RAIN_LENGTH_MAX:{
g_value_set_int (value, aatv->rain_length_max);
break;
}
default:{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
}
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