Start on opus decoder structure

1 files changed, 52 insertions, 0 deletions

diff --git a/src/codecs/opus.cpp b/src/codecs/opus.cpp
new file mode 100644
index 00000000..2c4291c2
--- /dev/null
+++ b/src/codecs/opus.cpp
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "opus.hpp"
+#include <stdint.h>
+#include <sys/_stdint.h>
+
+#include <cstdint>
+#include <cstring>
+#include <optional>
+
+#include "mad.h"
+
+#include "codec.hpp"
+#include "esp_log.h"
+#include "opus.h"
+#include "result.hpp"
+#include "types.hpp"
+
+namespace codecs {
+
+  static constexpr std::size_t kSampleBufferSize = 5760 * sizeof(float);
+
+XiphOpusDecoder::XiphOpusDecoder() {
+  int err;
+  opus_ = opus_decoder_create(48000, 2, &err);
+  assert(err == OPUS_OK);
+}
+XiphOpusDecoder::~XiphOpusDecoder() {
+  opus_decoder_destroy(opus_);
+}
+
+auto XiphOpusDecoder::BeginStream(const cpp::span<const std::byte> input)
+    -> Result<OutputFormat> {}
+
+auto XiphOpusDecoder::ContinueStream(cpp::span<const std::byte> input,
+                                     cpp::span<std::byte> output)
+    -> Result<OutputInfo> {
+  int samples_decoded = opus_decode_float(
+      opus_, reinterpret_cast<const unsigned char*>(input.data()),
+      input.size_bytes(), sample_buffer_, sample_buffer_len_, 0);
+}
+
+auto XiphOpusDecoder::SeekStream(cpp::span<const std::byte> input,
+                                 std::size_t target_sample) -> Result<void> {
+  return {};
+}
+
+}  // namespace codecs