Add a benchmark for chunked reading of a flac file

benchmarks/BM_readChunkFlac.cpp

@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: BSD-2-Clause
+
+// This code is part of the sfizz library and is licensed under a BSD 2-clause
+// license. You should have receive a LICENSE.md file along with the code.
+// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
+
+#include "SIMDHelpers.h"
+#include "Buffer.h"
+#include <benchmark/benchmark.h>
+#include <sndfile.hh>
+#include "ghc/filesystem.hpp"
+#define DR_FLAC_IMPLEMENTATION
+#include "dr_flac.h"
+#include "AudioBuffer.h"
+#include "absl/memory/memory.h"
+#ifndef NDEBUG
+#include <iostream>
+#endif
+
+class FileFixture : public benchmark::Fixture {
+public:
+    void SetUp(const ::benchmark::State& /* state */) {
+        rootPath = getPath() / "sample1.flac";
+        if (!ghc::filesystem::exists(rootPath)) {
+        #ifndef NDEBUG
+            std::cerr << "Can't find path" << '\n';
+        #endif
+            std::terminate();
+        }
+
+        sndfile = SndfileHandle(rootPath.c_str());
+        numFrames = static_cast<size_t>(sndfile.frames());
+        output = absl::make_unique<sfz::AudioBuffer<float>>(sndfile.channels(), sndfile.frames());
+    }
+
+    void TearDown(const ::benchmark::State& /* state */) {
+    }
+
+    ghc::filesystem::path getPath()
+    {
+        #ifdef __linux__
+        char buf[PATH_MAX + 1];
+        if (readlink("/proc/self/exe", buf, sizeof(buf) - 1) == -1)
+            return {};
+        std::string str { buf };
+        return str.substr(0, str.rfind('/'));
+        #elif _WIN32
+        return ghc::filesystem::current_path();
+        #endif
+    }
+
+    std::unique_ptr<sfz::AudioBuffer<float>> output;
+    SndfileHandle sndfile;
+    ghc::filesystem::path rootPath;
+    size_t numFrames;
+};
+
+
+BENCHMARK_DEFINE_F(FileFixture, SndFileOnce)(benchmark::State& state) {
+    for (auto _ : state)
+    {
+        sfz::Buffer<float> buffer { numFrames * sndfile.channels() };
+        sndfile.readf(buffer.data(), numFrames);
+        sfz::readInterleaved<float>(buffer, output->getSpan(0), output->getSpan(1));
+    }
+}
+
+BENCHMARK_DEFINE_F(FileFixture, SndFileChunked)(benchmark::State& state) {
+    for (auto _ : state)
+    {
+        auto chunkSize = static_cast<size_t>(state.range(0));
+        size_t framesRead = 0;
+        sndfile.seek(0, SEEK_SET);
+        while(framesRead < numFrames)
+        {
+            sfz::Buffer<float> buffer { chunkSize * sndfile.channels() };
+            auto read = sndfile.readf(buffer.data(), chunkSize);
+            sfz::readInterleaved<float>(
+                absl::MakeSpan(buffer).first(read),
+                output->getSpan(0).subspan(framesRead),
+                output->getSpan(1).subspan(framesRead)
+            );
+            framesRead += read;
+        }
+    }
+}
+
+
+BENCHMARK_DEFINE_F(FileFixture, DrWavChunked)(benchmark::State& state) {
+    auto chunkSize = static_cast<size_t>(state.range(0));
+    auto* flac = drflac_open_file(rootPath.c_str(), nullptr);
+    if (!flac) {
+        #ifndef NDEBUG
+            std::cerr << "Can't find path" << '\n';
+        #endif
+        std::terminate();
+    }
+    sfz::Buffer<float> buffer { chunkSize * flac->channels };
+
+    for (auto _ : state)
+    {
+        size_t framesRead = 0;
+        drflac_seek_to_pcm_frame(flac, 0);
+        while(framesRead < numFrames)
+        {
+            auto read = drflac_read_pcm_frames_f32(flac, chunkSize, buffer.data());
+            sfz::readInterleaved<float>(
+                absl::MakeSpan(buffer).first(read),
+                output->getSpan(0).subspan(framesRead),
+                output->getSpan(1).subspan(framesRead)
+            );
+            framesRead += read;
+        }
+    }
+}
+
+BENCHMARK_REGISTER_F(FileFixture, SndFileOnce);
+BENCHMARK_REGISTER_F(FileFixture, SndFileChunked)->RangeMultiplier(4)->Range((1 << 10), (1 << 16));
+BENCHMARK_REGISTER_F(FileFixture, DrWavChunked)->RangeMultiplier(4)->Range((1 << 10), (1 << 16));
+BENCHMARK_MAIN();

benchmarks/CMakeLists.txt

@@ -83,6 +83,8 @@ target_link_libraries(bm_flacfile PRIVATE sfizz-sndfile)
 
 sfizz_add_benchmark(bm_readChunk BM_readChunk.cpp)
 target_link_libraries(bm_readChunk PRIVATE sfizz-sndfile)
+sfizz_add_benchmark(bm_readChunkFlac BM_readChunkFlac.cpp)
+target_link_libraries(bm_readChunkFlac PRIVATE sfizz-sndfile)
 
 sfizz_add_benchmark(bm_resampleChunk BM_resampleChunk.cpp)
 target_link_libraries(bm_resampleChunk PRIVATE sfizz-sndfile)