Initial Commit

icon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128"><rect width="124" height="124" x="2" y="2" fill="#363d52" stroke="#212532" stroke-width="4" rx="14"/><g fill="#fff" transform="translate(12.322 12.322)scale(.101)"><path d="M105 673v33q407 354 814 0v-33z"/><path fill="#478cbf" d="m105 673 152 14q12 1 15 14l4 67 132 10 8-61q2-11 15-15h162q13 4 15 15l8 61 132-10 4-67q3-13 15-14l152-14V427q30-39 56-81-35-59-83-108-43 20-82 47-40-37-88-64 7-51 8-102-59-28-123-42-26 43-46 89-49-7-98 0-20-46-46-89-64 14-123 42 1 51 8 102-48 27-88 64-39-27-82-47-48 49-83 108 26 42 56 81zm0 33v39c0 276 813 276 814 0v-39l-134 12-5 69q-2 10-14 13l-162 11q-12 0-16-11l-10-65H446l-10 65q-4 11-16 11l-162-11q-12-3-14-13l-5-69z"/><path d="M483 600c0 34 58 34 58 0v-86c0-34-58-34-58 0z"/><circle cx="725" cy="526" r="90"/><circle cx="299" cy="526" r="90"/></g><g fill="#414042" transform="translate(12.322 12.322)scale(.101)"><circle cx="307" cy="532" r="60"/><circle cx="717" cy="532" r="60"/></g></svg>

icon.svg.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://ditahryq1qbup"
+path="res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.svg"
+dest_files=["res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

node_3d.gd

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+extends Node3D
+
+func encode_sstv():
+	#var encoder = Martin1.new()
+	var encoder = RobotBW8.new()
+	var cameraImage = get_viewport().get_texture().get_image()
+	#var cameraImage = load("res://checker.png").get_image()
+	#var cameraImage = load("res://spiral.png").get_image()
+	#var cameraImage = load("res://testtest.png").get_image()
+	#var cameraImage = load("res://testtest2.png").get_image()
+	#var cameraImage = load("res://testtest3.png").get_image()
+	var audioBuffer = encoder.EncodeSSTV(cameraImage)
+	
+	# Spew that audio yo.
+	$AudioStreamPlayer.stream.mix_rate = SSTVEncoder.SAMPLE_RATE
+	$AudioStreamPlayer.stream.buffer_length = 120
+	$AudioStreamPlayer.play()
+	var player = $AudioStreamPlayer.get_stream_playback()
+	for i in range(0, audioBuffer.size()):
+		player.push_frame(Vector2(audioBuffer[i], audioBuffer[i]))
+
+# a lil hacky delay so sdfgi can settle lol.
+var startTimer = 0
+var first = true
+func _process(delta):
+	if startTimer > 10 and first:
+		first = false
+		encode_sstv()
+
+	startTimer += 1

node_3d.gd.uid

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+uid://bx4xg8k3m1wos

node_3d.tscn

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+[gd_scene load_steps=8 format=3 uid="uid://dt230shblncgx"]
+
+[ext_resource type="Script" uid="uid://bx4xg8k3m1wos" path="res://node_3d.gd" id="1_a202f"]
+
+[sub_resource type="ProceduralSkyMaterial" id="ProceduralSkyMaterial_a202f"]
+
+[sub_resource type="Sky" id="Sky_noarx"]
+sky_material = SubResource("ProceduralSkyMaterial_a202f")
+
+[sub_resource type="Environment" id="Environment_a0tk4"]
+background_mode = 2
+sky = SubResource("Sky_noarx")
+sdfgi_enabled = true
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_r3fl7"]
+albedo_color = Color(1, 0, 0, 1)
+emission_enabled = true
+emission = Color(1, 0, 0, 1)
+emission_energy_multiplier = 3.02
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_jka67"]
+albedo_color = Color(0, 1, 0, 1)
+emission_enabled = true
+emission = Color(0, 1, 0, 1)
+emission_energy_multiplier = 3.02
+
+[sub_resource type="AudioStreamGenerator" id="AudioStreamGenerator_a202f"]
+
+[node name="Node3D" type="Node3D"]
+script = ExtResource("1_a202f")
+
+[node name="WorldEnvironment" type="WorldEnvironment" parent="."]
+environment = SubResource("Environment_a0tk4")
+
+[node name="Camera3D" type="Camera3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.997971, 0)
+
+[node name="CSGBox3D" type="CSGBox3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 1.23108, -0.464242, -4.94434)
+use_collision = true
+size = Vector3(9.60767, 1, 10.8887)
+
+[node name="CSGBox3D2" type="CSGBox3D" parent="."]
+transform = Transform3D(0.966061, 0, 0.258313, 0, 1, 0, -0.258313, 0, 0.966061, -0.617795, 0.535758, -2.20278)
+material = SubResource("StandardMaterial3D_r3fl7")
+
+[node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
+transform = Transform3D(-0.886604, 0.302007, -0.350322, 0.226305, 0.943798, 0.240896, 0.403386, 0.1343, -0.905121, 0, 1.9072, 0)
+shadow_enabled = true
+
+[node name="CSGBox3D3" type="CSGBox3D" parent="."]
+transform = Transform3D(0.869943, 0, -0.493152, 0, 1, 0, 0.493152, 0, 0.869943, 1.11562, 0.535758, -2.43883)
+material = SubResource("StandardMaterial3D_jka67")
+
+[node name="AudioStreamPlayer" type="AudioStreamPlayer" parent="."]
+stream = SubResource("AudioStreamGenerator_a202f")

project.godot

@@ -0,0 +1,16 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="SSTV"
+run/main_scene="uid://dt230shblncgx"
+config/features=PackedStringArray("4.4", "Forward Plus")
+config/icon="res://icon.svg"

src/Encoder.gd

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+extends Node
+class_name SSTVEncoder
+
+const TWO_PI = PI * 2
+const SAMPLE_RATE = 48000.0
+const VIS_BIT_FREQ = {
+	'ONE': 1100.0,
+	'ZERO': 1300.0,
+}
+const PREFIX_PULSE_LENGTH = 0.1  # 100 ms
+const HEADER_PULSE_LENGTH = 0.3  # 300 ms
+const HEADER_BREAK_LENGTH = 0.01 # 10 ms
+const VIS_BIT_LENGTH = 0.03      # 30 ms
+const SYNC_PULSE_FREQ = 1200.0
+
+var outputFloats = PackedFloat32Array()
+
+func EncodePrefix():
+	outputFloats.append_array(GenerateTone(1900, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(1500, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(1900, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(1500, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(2300, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(1500, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(2300, PREFIX_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(1500, PREFIX_PULSE_LENGTH))
+
+func EncodeHeader(vis: Array):
+	outputFloats.append_array(GenerateTone(1900, HEADER_PULSE_LENGTH))
+	outputFloats.append_array(GenerateTone(SYNC_PULSE_FREQ, HEADER_BREAK_LENGTH))
+	outputFloats.append_array(GenerateTone(1900, HEADER_PULSE_LENGTH))
+
+	# VIS Code
+	outputFloats.append_array(GenerateTone(SYNC_PULSE_FREQ, VIS_BIT_LENGTH))
+
+	var parity = 0
+	vis.reverse()
+	for bit in vis:
+		var bit_freq = VIS_BIT_FREQ["ONE"] if bit else VIS_BIT_FREQ["ZERO"]
+		if bit:
+			parity += 1
+		outputFloats.append_array(GenerateTone(bit_freq, VIS_BIT_LENGTH))
+
+	var parity_freq = VIS_BIT_FREQ["ZERO"] if parity % 2 == 0 else VIS_BIT_FREQ["ONE"]
+	outputFloats.append_array(GenerateTone(parity_freq, VIS_BIT_LENGTH))
+
+	outputFloats.append_array(GenerateTone(SYNC_PULSE_FREQ, VIS_BIT_LENGTH))
+
+func GenerateTone(frequency: float, duration: float) -> PackedFloat32Array:
+	var samples = PackedFloat32Array()
+	var total_samples = int(duration * SAMPLE_RATE)
+	
+	for i in range(total_samples):
+		var time = float(i) / SAMPLE_RATE
+		var sample = sin(TWO_PI * frequency * time)
+		samples.append(sample)
+	
+	return samples
+
+func GenerateToneFromCurve(frequencies: Array, duration: float) -> PackedFloat32Array:
+	var samples = PackedFloat32Array()
+	var totalSamples = int(duration * SAMPLE_RATE)
+	var num_points = frequencies.size()
+
+	var phase = 0.0
+	var timeStep = 1.0 / SAMPLE_RATE
+
+	for i in range(totalSamples):
+		var time = float(i) * timeStep
+		var normalized_time = time / duration
+		var index_f = normalized_time * (num_points - 1)
+		var index = int(index_f)
+		var frac = index_f - index
+		var freq: float
+		
+		if index >= num_points - 1:
+			freq = frequencies[num_points - 1]
+		else:
+			freq = lerp(frequencies[index], frequencies[index + 1], frac)
+		
+		phase += TWO_PI * freq * timeStep
+
+		var sample = sin(phase)
+		samples.append(sample)
+
+	return samples
+
+#func save_wav(path: String, samples: PackedFloat32Array) -> void:
+	#var file = FileAccess.open(path, FileAccess.WRITE)
+	#var byte_data = PackedByteArray()
+#
+	#var num_samples = samples.size()
+	#var data_chunk_size = num_samples * 2
+	#var file_size = 44 + data_chunk_size - 8
+#
+	## WAV Header
+	#byte_data.append_array("RIFF".to_ascii_buffer())
+	#byte_data.append_array(to_little_endian(file_size, 4))
+	#byte_data.append_array("WAVEfmt ".to_ascii_buffer())
+	#byte_data.append_array(to_little_endian(16, 4)) # PCM header size
+	#byte_data.append_array(to_little_endian(1, 2))  # PCM format
+	#byte_data.append_array(to_little_endian(1, 2))
+	#byte_data.append_array(to_little_endian(SAMPLE_RATE, 4))
+	#byte_data.append_array(to_little_endian(SAMPLE_RATE * 1 * 16 / 8, 4)) # Byte rate
+	#byte_data.append_array(to_little_endian(1 * 16 / 8, 2)) # Block align
+	#byte_data.append_array(to_little_endian(16, 2))
+	#byte_data.append_array("data".to_ascii_buffer())
+	#byte_data.append_array(to_little_endian(data_chunk_size, 4))
+#
+	## Sample data
+	#for sample in samples:
+		#var int_sample = int(clamp(sample * 32767, -32767, 32767))
+		#byte_data.append_array(to_little_endian(int_sample, 2))
+#
+	#file.store_buffer(byte_data)
+	#file.close()
+#
+#func to_little_endian(value: int, byte_count: int) -> PackedByteArray:
+	#var ba = PackedByteArray()
+	#for i in range(byte_count):
+		#ba.append((value >> (8 * i)) & 0xFF)
+	#return ba

src/Encoder.gd.uid

@@ -0,0 +1 @@
+uid://3qtsqt2dj0je

src/Martin1.gd

@@ -0,0 +1,50 @@
+extends SSTVEncoder
+class_name Martin1
+
+const BLANKING_PULSE_FREQ = 1500.0
+const COLOR_FREQ_MULT = 3.1372549
+
+func get_rgb_value_as_freq(image: Image, scan_line: int, vert_pos: int) -> Array:
+	#var index = scan_line * (vertResolution * 4) + vert_pos * 4
+	var color = image.get_pixel(vert_pos, scan_line)
+	var red = float(color.r8) * COLOR_FREQ_MULT + 1500.0
+	var green = float(color.g8) * COLOR_FREQ_MULT + 1500.0
+	var blue = float(color.b8) * COLOR_FREQ_MULT + 1500.0
+	return [red, green, blue]
+
+var numScanLines = 256.0
+var vertResolution = 320.0
+var blankingInterval = 0.000572
+var scanLineLength = 0.146432
+var syncPulseLength = 0.004862
+var preparedImage = []
+
+func PrepareImage(image: Image):
+	image.resize(vertResolution, numScanLines)
+	image.convert(Image.FORMAT_RGB8)
+
+	for scanLine in range(0, numScanLines):
+		var red = []
+		var green = []
+		var blue = []
+		for vertPos in range(0, vertResolution):
+			var freqs = get_rgb_value_as_freq(image, scanLine, vertPos)
+			red.push_back(freqs[0]);
+			green.push_back(freqs[1]);
+			blue.push_back(freqs[2]);
+		preparedImage.push_back([green, blue, red]);
+
+func EncodeSSTV(image: Image):
+	PrepareImage(image)
+	
+	EncodePrefix()
+	EncodeHeader([false, true, false, true, true, false, false])
+
+	for scanLine in range(0, numScanLines):
+		outputFloats.append_array(GenerateTone(SYNC_PULSE_FREQ, syncPulseLength))
+		outputFloats.append_array(GenerateTone(BLANKING_PULSE_FREQ, blankingInterval))
+		for dataLine in range(0, 3):
+			outputFloats.append_array(GenerateToneFromCurve(preparedImage[scanLine][dataLine], scanLineLength))
+			outputFloats.append_array(GenerateTone(BLANKING_PULSE_FREQ, blankingInterval))
+	
+	return outputFloats

src/Martin1.gd.uid

@@ -0,0 +1 @@
+uid://cprn0ne0v2x2u

src/RobotBW8.gd

@@ -0,0 +1,41 @@
+extends SSTVEncoder
+class_name RobotBW8
+
+var preparedImage: Array
+
+const BLACK = 1500.0
+const WHITE = 2300.0
+const COLOR_FREQ_MULT = 3.1372549
+const BLANKING_PULSE_FREQ = 1500.0
+
+const SYNC_PULSE = 1200.0
+
+var scanLineLength = 0.056
+var syncPulseLength = 0.01
+var blankingInterval = 0.000572
+var numScanLines = 120
+
+func PrepareImage(image: Image):
+	image.resize(160, numScanLines)
+	image.convert(Image.FORMAT_RGB8)
+	
+	for h in range(image.get_height()):
+		var line = PackedFloat32Array()
+		for w in range(image.get_width()):
+			var color = image.get_pixel(w, h)
+			line.push_back(round((color.r8 + color.g8 + color.b8) / 3) * COLOR_FREQ_MULT + BLACK)
+		preparedImage.push_back(line)
+
+func EncodeSSTV(image: Image):
+	PrepareImage(image)
+	
+	EncodePrefix()
+	EncodeHeader([false, false, false, false, false, true, false])
+	
+	for scanLine in range(0, numScanLines):
+		outputFloats.append_array(GenerateTone(SYNC_PULSE_FREQ, syncPulseLength))
+		outputFloats.append_array(GenerateTone(BLANKING_PULSE_FREQ, blankingInterval))
+		outputFloats.append_array(GenerateToneFromCurve(preparedImage[scanLine], scanLineLength))
+		outputFloats.append_array(GenerateTone(BLANKING_PULSE_FREQ, blankingInterval))
+		
+	return outputFloats

src/RobotBW8.gd.uid

@@ -0,0 +1 @@
+uid://bqk3kugv2vy3f

tests/checker.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://doprjuugw7ga7"
+path="res://.godot/imported/checker.png-6bb199bedbd039461e4248c1d0b9691d.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://checker.png"
+dest_files=["res://.godot/imported/checker.png-6bb199bedbd039461e4248c1d0b9691d.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

tests/spiral.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://c7ayqic8e3l60"
+path="res://.godot/imported/spiral.png-4b65a5988dfd3c48a98523c1603a55da.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://spiral.png"
+dest_files=["res://.godot/imported/spiral.png-4b65a5988dfd3c48a98523c1603a55da.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

tests/testtest.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b44c511u6oile"
+path="res://.godot/imported/testtest.png-3138b9f8c3bb6f85feeb295d99c6a7a2.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://testtest.png"
+dest_files=["res://.godot/imported/testtest.png-3138b9f8c3bb6f85feeb295d99c6a7a2.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

tests/testtest2.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://t5rtcbk8u7yo"
+path="res://.godot/imported/testtest2.png-939c8d08bcfd841ad5a1a682e0766d88.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://testtest2.png"
+dest_files=["res://.godot/imported/testtest2.png-939c8d08bcfd841ad5a1a682e0766d88.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

tests/testtest3.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://cqyo3c1lqmrf5"
+path="res://.godot/imported/testtest3.png-6018875a4a62a4fd97780d49f559d924.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://testtest3.png"
+dest_files=["res://.godot/imported/testtest3.png-6018875a4a62a4fd97780d49f559d924.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1