Add vorbis and flac decoders, flesh out codec interface

vorbis doesn't quite work yet, not sure why. will pick it up again
later.

1 files changed, 42 insertions, 0 deletions

diff --git a/src/codecs/include/stbvorbis.hpp b/src/codecs/include/stbvorbis.hpp
new file mode 100644
index 00000000..045e264e
--- /dev/null
+++ b/src/codecs/include/stbvorbis.hpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <optional>
+#include <string>
+#include <utility>
+
+#include "stb_vorbis.h"
+
+#include "codec.hpp"
+
+namespace codecs {
+
+class StbVorbisDecoder : public ICodec {
+ public:
+  StbVorbisDecoder();
+  ~StbVorbisDecoder();
+
+  auto BeginStream(cpp::span<const std::byte>) -> Result<OutputFormat> override;
+  auto ContinueStream(cpp::span<const std::byte>, cpp::span<std::byte>)
+      -> Result<OutputInfo> override;
+  auto SeekStream(cpp::span<const std::byte> input, std::size_t target_sample)
+      -> Result<void> override;
+
+ private:
+  stb_vorbis* vorbis_;
+
+  int current_sample_;
+  int num_channels_;
+  int num_samples_;
+  float** samples_array_;
+};
+
+}  // namespace codecs