Use the libspeexdsp resampler

AFAICT it runs a little slower? but it's fixed point, and has much
better understood audio characteristics.

1 files changed, 4 insertions, 17 deletions

diff --git a/src/audio/include/resample.hpp b/src/audio/include/resample.hpp
index 3855415a..7b114f59 100644
--- a/src/audio/include/resample.hpp
+++ b/src/audio/include/resample.hpp
@@ -4,6 +4,7 @@
 #include <vector>
 
 #include "span.hpp"
+#include "speex/speex_resampler.h"
 
 #include "sample.hpp"
 
@@ -17,28 +18,14 @@ class Resampler {
 
   ~Resampler();
 
-  auto source_sample_rate() -> uint32_t { return source_sample_rate_; }
-  auto target_sample_rate() -> uint32_t { return target_sample_rate_; }
-  auto channels() -> uint_fast8_t { return num_channels_; }
-
-  auto Process(cpp::span<const sample::Sample> input,
+  auto Process(cpp::span<sample::Sample> input,
                cpp::span<sample::Sample> output,
                bool end_of_data) -> std::pair<size_t, size_t>;
 
  private:
-  auto Subsample(int channel) -> float;
-  auto ApplyFilter(cpp::span<float> filter, cpp::span<float> input) -> float;
-
-  uint32_t source_sample_rate_;
-  uint32_t target_sample_rate_;
-  float factor_;
+  int err_;
+  SpeexResamplerState* resampler_;
   uint8_t num_channels_;
-
-  std::vector<float*> channel_buffers_;
-  size_t channel_buffer_size_;
-
-  float output_offset_;
-  int32_t input_index_;
 };
 
 }  // namespace audio
\ No newline at end of file