WIP merge cyclically dependent components into one big component

1 files changed, 77 insertions, 0 deletions

diff --git a/src/tangara/audio/fatfs_source.cpp b/src/tangara/audio/fatfs_source.cpp
new file mode 100644
index 00000000..dccdd581
--- /dev/null
+++ b/src/tangara/audio/fatfs_source.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "fatfs_source.hpp"
+#include <sys/_stdint.h>
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+
+#include "esp_log.h"
+#include "event_queue.hpp"
+#include "ff.h"
+
+#include "audio_source.hpp"
+#include "codec.hpp"
+#include "spi.hpp"
+#include "system_events.hpp"
+#include "types.hpp"
+
+namespace audio {
+
+[[maybe_unused]] static constexpr char kTag[] = "fatfs_src";
+
+FatfsSource::FatfsSource(codecs::StreamType t, std::unique_ptr<FIL> file)
+    : IStream(t), file_(std::move(file)) {}
+
+FatfsSource::~FatfsSource() {
+  auto lock = drivers::acquire_spi();
+  f_close(file_.get());
+}
+
+auto FatfsSource::Read(std::span<std::byte> dest) -> ssize_t {
+  auto lock = drivers::acquire_spi();
+  if (f_eof(file_.get())) {
+    return 0;
+  }
+  UINT bytes_read = 0;
+  FRESULT res = f_read(file_.get(), dest.data(), dest.size(), &bytes_read);
+  if (res != FR_OK) {
+    events::System().Dispatch(system_fsm::StorageError{.error = res});
+    return -1;
+  }
+  return bytes_read;
+}
+
+auto FatfsSource::CanSeek() -> bool {
+  return true;
+}
+
+auto FatfsSource::SeekTo(int64_t destination, SeekFrom from) -> void {
+  auto lock = drivers::acquire_spi();
+  switch (from) {
+    case SeekFrom::kStartOfStream:
+      f_lseek(file_.get(), destination);
+      break;
+    case SeekFrom::kEndOfStream:
+      f_lseek(file_.get(), f_size(file_.get()) + destination);
+      break;
+    case SeekFrom::kCurrentPosition:
+      f_lseek(file_.get(), f_tell(file_.get()) + destination);
+      break;
+  }
+}
+
+auto FatfsSource::CurrentPosition() -> int64_t {
+  return f_tell(file_.get());
+}
+
+auto FatfsSource::Size() -> std::optional<int64_t> {
+  return f_size(file_.get());
+}
+
+}  // namespace audio