wav-codec (#13)

here is a wav decoder, enjoy!

Reviewed-on: https://codeberg.org/cool-tech-zone/tangara-fw/pulls/13
Reviewed-by: cooljqln <cooljqln@noreply.codeberg.org>
Co-authored-by: ailurux <ailuruxx@gmail.com>
Co-committed-by: ailurux <ailuruxx@gmail.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/codecs/include/wav.hpp b/src/codecs/include/wav.hpp
new file mode 100644
index 00000000..896976dd
--- /dev/null
+++ b/src/codecs/include/wav.hpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2023 Daniel <ailuruxx@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <optional>
+#include <string>
+#include <utility>
+
+#include "sample.hpp"
+#include "source_buffer.hpp"
+
+#include "codec.hpp"
+
+namespace codecs {
+
+static const uint16_t kWaveFormatPCM = 0x0001;
+static const uint16_t kWaveFormatIEEEFloat = 0x0003;
+static const uint16_t kWaveFormatAlaw = 0x0006;
+static const uint16_t kWaveFormatMulaw = 0x0007;
+static const uint16_t kWaveFormatExtensible = 0xFFFE;
+
+class WavDecoder : public ICodec {
+ public:
+  WavDecoder();
+  ~WavDecoder();
+
+  auto OpenStream(std::shared_ptr<IStream> input)
+      -> cpp::result<OutputFormat, Error> override;
+
+  auto DecodeTo(cpp::span<sample::Sample> destination)
+      -> cpp::result<OutputInfo, Error> override;
+
+  auto SeekTo(std::size_t target_sample) -> cpp::result<void, Error> override;
+
+  WavDecoder(const WavDecoder&) = delete;
+  WavDecoder& operator=(const WavDecoder&) = delete;
+
+ private:
+  std::shared_ptr<IStream> input_;
+  SourceBuffer buffer_;
+  uint16_t wave_format_;
+  uint16_t subformat_;
+  OutputFormat output_format_;
+  uint16_t bytes_per_sample_;
+  uint16_t num_channels_;
+
+  auto GetFormat() const -> uint16_t;
+};
+
+}  // namespace codecs