Downscaling working!

src/audio/audio_task.cpp

@@ -297,7 +297,8 @@ auto AudioTask::FinishDecoding(InputStream& stream) -> void {
     InputStream padded_stream{mad_buffer.get()};
 
     OutputStream writer{codec_buffer_.get()};
-    auto res = codec_->ContinueStream(stream.data(), writer.data_as<sample::Sample>());
+    auto res =
+        codec_->ContinueStream(stream.data(), writer.data_as<sample::Sample>());
     if (res.second.has_error()) {
       return;
     }

src/audio/i2s_audio_output.cpp

@@ -117,19 +117,19 @@ auto I2SAudioOutput::AdjustVolumeDown() -> bool {
 
 auto I2SAudioOutput::PrepareFormat(const StreamInfo::Pcm& orig)
     -> StreamInfo::Pcm {
+  /*
 return StreamInfo::Pcm{
     .channels = std::min<uint8_t>(orig.channels, 2),
     .bits_per_sample = std::clamp<uint8_t>(orig.bits_per_sample, 16, 32),
     .sample_rate = std::clamp<uint32_t>(orig.sample_rate, 8000, 96000),
 };
-    /*
+  */
   return StreamInfo::Pcm{
       .channels = std::min<uint8_t>(orig.channels, 2),
       .bits_per_sample = 16,
       //.sample_rate = std::clamp<uint32_t>(orig.sample_rate, 8000, 96000),
-      .sample_rate = 32000,
+      .sample_rate = 44100,
   };
-    */
 }
 
 auto I2SAudioOutput::Configure(const StreamInfo::Pcm& pcm) -> void {

src/audio/include/sink_mixer.hpp

@@ -40,7 +40,8 @@ class SinkMixer {
   auto HandleBytes() -> void;
 
   auto Resample(InputStream&, OutputStream&) -> bool;
-  auto ApplyDither(cpp::span<sample::Sample> samples, uint_fast8_t bits) -> void;
+  auto ApplyDither(cpp::span<sample::Sample> samples, uint_fast8_t bits)
+      -> void;
   auto Downscale(cpp::span<sample::Sample>, cpp::span<int16_t>) -> void;
 
   enum class Command {

src/audio/sink_mixer.cpp

@@ -137,7 +137,7 @@ auto SinkMixer::HandleBytes() -> void {
     return;
   }
 
-  while (!input_stream_->empty()) {
+  while (input_stream_->info().bytes_in_stream() >= sizeof(sample::Sample)) {
     RawStream* output_source;
     if (pcm->sample_rate != target_format_.sample_rate) {
       OutputStream resampled_writer{resampled_stream_.get()};
@@ -150,6 +150,9 @@ auto SinkMixer::HandleBytes() -> void {
       output_source = input_stream_.get();
     }
 
+    size_t bytes_consumed = output_source->info().bytes_in_stream();
+    size_t bytes_to_send = output_source->info().bytes_in_stream();
+
     if (target_format_.bits_per_sample == 16) {
       // This is slightly scary; we're basically reaching into the internals of
       // the stream buffer to do in-place conversion of samples. Saving an
@@ -163,19 +166,20 @@ auto SinkMixer::HandleBytes() -> void {
       ApplyDither(src, 16);
       Downscale(src, dest);
 
-      output_source->info().bytes_in_stream() = dest.size_bytes();
+      bytes_consumed = src.size_bytes();
+      bytes_to_send = src.size_bytes() / 2;
     }
 
     InputStream output{output_source};
     cpp::span<const std::byte> buf = output.data();
 
     size_t bytes_sent = 0;
-    while (bytes_sent < buf.size_bytes()) {
-      auto cropped = buf.subspan(bytes_sent);
+    while (bytes_sent < bytes_to_send) {
+      auto cropped = buf.subspan(bytes_sent, bytes_to_send - bytes_sent);
       bytes_sent += xStreamBufferSend(sink_, cropped.data(),
                                       cropped.size_bytes(), portMAX_DELAY);
     }
-    output.consume(bytes_sent);
+    output.consume(bytes_consumed);
   }
 }
 

src/audio/stream_info.cpp

@@ -33,8 +33,7 @@ RawStream::RawStream(std::size_t size)
 RawStream::RawStream(std::size_t size, uint32_t caps)
     : info_(),
       buffer_size_(size),
-      buffer_(reinterpret_cast<std::byte*>(
-          heap_caps_malloc(size, caps))) {
+      buffer_(reinterpret_cast<std::byte*>(heap_caps_malloc(size, caps))) {
   assert(buffer_ != NULL);
 }
 

src/codecs/include/codec.hpp

@@ -16,8 +16,8 @@
 #include <string>
 #include <utility>
 
-#include "sample.hpp"
 #include "result.hpp"
+#include "sample.hpp"
 #include "span.hpp"
 #include "types.hpp"
 

src/codecs/sample.cpp

@@ -269,7 +269,6 @@ void foconv(int* src, uint8_t* dst, int bits, int skip, int count) {
   }
 }
 
+}  // namespace sample
 
-  }
-  
-}
+}  // namespace audio

src/tasks/tasks.hpp

@@ -59,13 +59,14 @@ template <Type t>
 auto StartPersistent(const std::function<void(void)>& fn) -> void {
   StaticTask_t* task_buffer = new StaticTask_t;
   cpp::span<StackType_t> stack = AllocateStack<t>();
-  xTaskCreateStatic(&PersistentMain, Name<t>().c_str(),
-                                stack.size(), new std::function<void(void)>(fn),
-                                Priority<t>(), stack.data(), task_buffer);
+  xTaskCreateStatic(&PersistentMain, Name<t>().c_str(), stack.size(),
+                    new std::function<void(void)>(fn), Priority<t>(),
+                    stack.data(), task_buffer);
 }
 
 template <Type t>
-auto StartPersistent(BaseType_t core, const std::function<void(void)>& fn) -> void {
+auto StartPersistent(BaseType_t core, const std::function<void(void)>& fn)
+    -> void {
   StaticTask_t* task_buffer = new StaticTask_t;
   cpp::span<StackType_t> stack = AllocateStack<t>();
   xTaskCreateStaticPinnedToCore(&PersistentMain, Name<t>().c_str(),