Fix dangle build issues, do some tweaks to investigate performance

src/audio/CMakeLists.txt

@@ -7,6 +7,6 @@ idf_component_register(
   "stream_message.cpp" "i2s_audio_output.cpp" "stream_buffer.cpp" "track_queue.cpp"
   "stream_event.cpp" "stream_info.cpp" "audio_fsm.cpp" "sink_mixer.cpp" "resample.cpp"
   INCLUDE_DIRS "include"
-  REQUIRES "codecs" "drivers" "cbor" "result" "tasks" "span" "memory" "tinyfsm" "database" "system_fsm" "playlist" "libsamplerate")
+  REQUIRES "codecs" "drivers" "cbor" "result" "tasks" "span" "memory" "tinyfsm" "database" "system_fsm" "playlist")
 
 target_compile_options(${COMPONENT_LIB} PRIVATE ${EXTRA_WARNINGS})

src/audio/i2s_audio_output.cpp

@@ -127,7 +127,7 @@ auto I2SAudioOutput::PrepareFormat(const StreamInfo::Pcm& orig)
   return StreamInfo::Pcm{
       .channels = std::min<uint8_t>(orig.channels, 2),
       .bits_per_sample = 16,
-      .sample_rate = 48000,
+      .sample_rate = 44100,
   };
 }
 

src/audio/include/sink_mixer.hpp

@@ -12,7 +12,6 @@
 
 #include "resample.hpp"
 #include "sample.hpp"
-#include "samplerate.h"
 
 #include "audio_decoder.hpp"
 #include "audio_sink.hpp"

src/audio/resample.cpp

@@ -231,7 +231,8 @@ auto Resampler::Process(cpp::span<const sample::Sample> input,
                         cpp::span<sample::Sample> output,
                         bool end_of_data) -> std::pair<size_t, size_t> {
   size_t samples_used = 0;
-  std::vector<size_t> samples_produced = {num_channels_, 0};
+  std::vector<size_t> samples_produced = {};
+  samples_produced.resize(num_channels_, 0);
   size_t total_samples_produced = 0;
 
   size_t slop = (factor_ >> kPhaseBits) + 1;

src/audio/sink_mixer.cpp

@@ -15,7 +15,6 @@
 #include "freertos/projdefs.h"
 #include "resample.hpp"
 #include "sample.hpp"
-#include "samplerate.h"
 
 #include "stream_info.hpp"
 #include "tasks.hpp"
@@ -23,7 +22,7 @@
 static constexpr char kTag[] = "mixer";
 
 static constexpr std::size_t kSourceBufferLength = 2 * 1024;
-static constexpr std::size_t kSampleBufferLength = 4 * 1024;
+static constexpr std::size_t kSampleBufferLength = 2 * 1024;
 
 namespace audio {
 
@@ -33,8 +32,8 @@ SinkMixer::SinkMixer(StreamBufferHandle_t dest)
       resampler_(nullptr),
       source_(xStreamBufferCreate(kSourceBufferLength, 1)),
       sink_(dest) {
-  input_stream_.reset(new RawStream(kSampleBufferLength));
-  resampled_stream_.reset(new RawStream(kSampleBufferLength));
+  input_stream_.reset(new RawStream(kSampleBufferLength, MALLOC_CAP_SPIRAM));
+  resampled_stream_.reset(new RawStream(kSampleBufferLength, MALLOC_CAP_SPIRAM));
 
   tasks::StartPersistent<tasks::Type::kMixer>([&]() { Main(); });
 }
@@ -188,9 +187,6 @@ auto SinkMixer::Resample(InputStream& in, OutputStream& out) -> bool {
   auto res = resampler_->Process(in.data_as<sample::Sample>(),
                                  out.data_as<sample::Sample>(), false);
 
-  ESP_LOGI(kTag, "resampler sent %u samples, consumed %u, produced %u",
-           in.data().size(), res.first, res.second);
-
   in.consume(res.first * sizeof(sample::Sample));
   out.add(res.first * sizeof(sample::Sample));