Bitmap preview in SSTV TX

firmware/application/ui_sstvtx.cpp

@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2016 Furrtek
+ * 
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "ui_sstvtx.hpp"
+#include "string_format.hpp"
+
+#include "portapack.hpp"
+#include "hackrf_hal.hpp"
+
+#include <cstring>
+#include <stdio.h>
+
+using namespace portapack;
+
+namespace ui {
+
+void SSTVTXView::focus() {
+	if (file_error)
+		nav_.display_modal("No files", "No valid bitmaps\nin /sstv directory.", ABORT, nullptr);
+	else
+		options_bitmaps.focus();
+}
+
+void SSTVTXView::read_boundary(uint8_t * const buffer, uint32_t position, uint32_t length) {
+	uint32_t to_read, split;
+	uint8_t * buffer_copy = buffer;
+	
+	bmp_file.seek(position);
+	
+	// FatFS bug workaround: we can't read across 512 byte boundaries ?!
+	while (length) {
+		to_read = (length <= 512) ? length : 512;
+		if ((position & 512) != ((position + to_read - 1) & 512)) {
+			// Crossing: do 2 reads before and after the boundary
+			split = 512 - (position & 511);
+			bmp_file.read(buffer_copy, split);
+			bmp_file.read(buffer_copy + split, to_read - split);
+		} else {
+			// No crossing, just read normally
+			bmp_file.read(buffer_copy, to_read);
+		}
+		position += to_read;
+		buffer_copy += to_read;
+		length -= to_read;
+	}
+}
+
+void SSTVTXView::paint(Painter&) {
+	ui::Color line_buffer[160];
+	Coord line;
+	uint32_t data_idx, bmp_px, pixel_idx;
+	uint8_t pixels_buffer[320 * 3];		// 320 pixels @ 24bpp
+	
+	data_idx = bmp_header.image_data;
+	
+	for (line = 0; line < (256 / 2); line++) {
+		
+		// Buffer a whole line
+		read_boundary(pixels_buffer, data_idx, sizeof(pixels_buffer));
+		
+		for (bmp_px = 0; bmp_px < 160; bmp_px++) {
+			pixel_idx = bmp_px * 3 * 2;
+			line_buffer[bmp_px] = Color(pixels_buffer[pixel_idx + 2],
+										pixels_buffer[pixel_idx + 1],
+										pixels_buffer[pixel_idx + 0]);
+		}
+		portapack::display.render_line({ 16, 80 + 128 - line }, 160, line_buffer);
+		data_idx += sizeof(pixels_buffer) * 2;
+	}
+}
+
+SSTVTXView::~SSTVTXView() {
+	transmitter_model.disable();
+	baseband::shutdown();
+}
+
+void SSTVTXView::on_tuning_frequency_changed(rf::Frequency f) {
+	transmitter_model.set_tuning_frequency(f);
+}
+
+void SSTVTXView::start_tx() {
+	// Baseband SSTV TX code should have a 2 scanlines buffer, and ask
+	// for fill-up when there's 1 or less remaining. This should leave
+	// enough time for the code here to generate the scanline data
+	// before tx.
+	
+	const uint8_t VIS_code = 0b00011101;	// Scottie 2
+	
+	// Calibration:
+	// 1900 300ms
+	// 1200 10ms
+	// 1900 300ms
+	// VIS: (30ms * 10 = 300ms)
+	// 1200
+	// 00011101 (0=1300, 1=1100)
+	// 1200
+	
+	// Scottie 2: 320x256 px
+	
+	// V-sync ?
+	// First line: 1200 9ms
+	// Scanline:
+	// 1500 1.5ms
+	// Green
+	// 1500 1.5ms
+	// Blue
+	// 1200 9ms
+	// 1500 1.5ms
+	// Red
+	// Scanline time: 88.064ms (.2752ms/pixel @ 320 pixels/line)
+	
+	transmitter_model.set_sampling_rate(1536000U);
+	transmitter_model.set_rf_amp(true);
+	//transmitter_model.set_lna(40);
+	//transmitter_model.set_vga(40);
+	transmitter_model.set_baseband_bandwidth(1750000);
+	transmitter_model.enable();
+	
+	/*baseband::set_sstvtx_data(
+		(1536000 / 44100) - 1,
+		12000,
+		1,
+		false,
+		0
+	);*/
+}
+
+void SSTVTXView::on_bitmap_changed(size_t index) {
+	bmp_file.open("/sstv/" + bitmaps[index].string());
+	bmp_file.read(&bmp_header, sizeof(bmp_header));
+	set_dirty();
+}
+
+SSTVTXView::SSTVTXView(
+	NavigationView& nav
+) : nav_ (nav)
+{
+	std::vector<std::filesystem::path> file_list;
+	using option_t = std::pair<std::string, int32_t>;
+	using options_t = std::vector<option_t>;
+	options_t bitmap_options;
+	uint32_t c;
+	
+	// Search for valid bitmaps
+	file_list = scan_root_files(u"/sstv", u"*.bmp");
+	if (!file_list.size()) {
+		file_error = true;
+		return;
+	}
+	for (const auto& file_name : file_list) {
+		if (!bmp_file.open("/sstv/" + file_name.string()).is_valid()) {
+			bmp_file.read(&bmp_header, sizeof(bmp_header));
+			if ((bmp_header.signature == 0x4D42) &&
+				(bmp_header.width == 320) &&		// Must be == 320x256 pixels for now
+				(bmp_header.height == 256) &&
+				(bmp_header.planes == 1) &&
+				(bmp_header.bpp >= 24) &&			// 24 or 32 bpp
+				(bmp_header.compression == 0)) {	// No compression
+					bitmaps.push_back(file_name);
+			}
+		}
+	}
+	if (!bitmaps.size()) {
+		file_error = true;
+		return;
+	}
+	
+	//baseband::run_image(portapack::spi_flash::image_tag_sstv_tx);
+	
+	add_children({
+		&labels,
+		&options_bitmaps,
+		&text_mode
+	});
+	
+	for (const auto& bitmap : bitmaps)
+		bitmap_options.emplace_back(bitmap.string().substr(0, 16), 0);
+	
+	options_bitmaps.set_options(bitmap_options);
+	options_bitmaps.on_change = [this](size_t i, int32_t) {
+		this->on_bitmap_changed(i);
+	};
+	options_bitmaps.set_selected_index(0);
+}
+
+} /* namespace ui */