Commit replay stuff before sync

firmware/baseband/stream_output.cpp

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2016 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 "stream_output.hpp"
+
+#include "lpc43xx_cpp.hpp"
+using namespace lpc43xx;
+
+StreamOutput::StreamOutput(ReplayConfig* const config) :
+	fifo_buffers_empty { buffers_empty.data(), buffer_count_max_log2 },
+	fifo_buffers_full { buffers_full.data(), buffer_count_max_log2 },
+	config { config },
+	data { std::make_unique<uint8_t[]>(config->read_size * config->buffer_count) }
+{
+	config->fifo_buffers_empty = &fifo_buffers_empty;
+	config->fifo_buffers_full = &fifo_buffers_full;
+
+	for(size_t i=0; i<config->buffer_count; i++) {
+		buffers[i] = { &(data.get()[i * config->read_size]), config->read_size };
+		fifo_buffers_empty.in(&buffers[i]);
+	}
+}
+
+size_t StreamOutput::write(const void* const data, const size_t length) {
+	const uint8_t* p = static_cast<const uint8_t*>(data);
+	size_t written = 0;
+
+	while( written < length ) {
+		if( !active_buffer ) {
+			// We need an empty buffer...
+			if( !fifo_buffers_empty.out(active_buffer) ) {
+				// ...but none are available. Samples were dropped.
+				break;
+			}
+		}
+		
+		const auto remaining = length - written;
+		written += active_buffer->write(&p[written], remaining);
+
+		if( active_buffer->is_full() ) {
+			if( !fifo_buffers_full.in(active_buffer) ) {
+				// FIFO is fuil of buffers, there's no place for this one.
+				// Bail out of the loop, and try submitting the buffer in the
+				// next pass.
+				// This should never happen if the number of buffers is less
+				// than the capacity of the FIFO.
+				break;
+			}
+			active_buffer = nullptr;
+			creg::m4txevent::assert();
+		}
+	}
+
+	config->baseband_bytes_sent += length;
+
+	return written;
+}