mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-26 09:30:24 +00:00
c145d5410c
Similar to d253beb2f7.
Found with Ali's clang-query script in Shell:
```
for $(find AK Userland -type f -name '*.h' -o -name '*.cpp') {
in_parallel -j 12 -- clang-query -p \
Build/lagom/compile_commands.json $it -c \
'm cxxNewExpr(has(cxxConstructExpr(hasAnyArgument(hasDescendant( \
allOf(isExpandedFromMacro("TRY"), stmtExpr()))))))' \
} | grep -v 'matches.' | tee results
```
122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
/*
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* Copyright (c) 2018-2023, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/TypedTransfer.h>
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#include <LibAudio/FlacLoader.h>
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#include <LibAudio/Loader.h>
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#include <LibAudio/MP3Loader.h>
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#include <LibAudio/QOALoader.h>
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#include <LibAudio/WavLoader.h>
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#include <LibCore/MappedFile.h>
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namespace Audio {
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LoaderPlugin::LoaderPlugin(NonnullOwnPtr<SeekableStream> stream)
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: m_stream(move(stream))
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{
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}
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Loader::Loader(NonnullOwnPtr<LoaderPlugin> plugin)
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: m_plugin(move(plugin))
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{
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}
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struct LoaderPluginInitializer {
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bool (*sniff)(SeekableStream&);
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ErrorOr<NonnullOwnPtr<LoaderPlugin>, LoaderError> (*create)(NonnullOwnPtr<SeekableStream>);
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};
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#define ENUMERATE_LOADER_PLUGINS \
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__ENUMERATE_LOADER_PLUGIN(Wav) \
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__ENUMERATE_LOADER_PLUGIN(Flac) \
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__ENUMERATE_LOADER_PLUGIN(QOA) \
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__ENUMERATE_LOADER_PLUGIN(MP3)
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static constexpr LoaderPluginInitializer s_initializers[] = {
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#define __ENUMERATE_LOADER_PLUGIN(Type) \
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{ Type##LoaderPlugin::sniff, Type##LoaderPlugin::create },
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ENUMERATE_LOADER_PLUGINS
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#undef __ENUMERATE_LOADER_PLUGIN
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};
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ErrorOr<NonnullRefPtr<Loader>, LoaderError> Loader::create(StringView path)
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{
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auto stream = TRY(Core::MappedFile::map(path, Core::MappedFile::Mode::ReadOnly));
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auto plugin = TRY(Loader::create_plugin(move(stream)));
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return adopt_ref(*new (nothrow) Loader(move(plugin)));
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}
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ErrorOr<NonnullRefPtr<Loader>, LoaderError> Loader::create(ReadonlyBytes buffer)
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{
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auto stream = TRY(try_make<FixedMemoryStream>(buffer));
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auto plugin = TRY(Loader::create_plugin(move(stream)));
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return adopt_ref(*new (nothrow) Loader(move(plugin)));
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}
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ErrorOr<NonnullOwnPtr<LoaderPlugin>, LoaderError> Loader::create_plugin(NonnullOwnPtr<SeekableStream> stream)
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{
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for (auto const& loader : s_initializers) {
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if (loader.sniff(*stream)) {
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TRY(stream->seek(0, SeekMode::SetPosition));
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return loader.create(move(stream));
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}
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TRY(stream->seek(0, SeekMode::SetPosition));
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}
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return LoaderError { "No loader plugin available" };
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}
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LoaderSamples Loader::get_more_samples(size_t samples_to_read_from_input)
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{
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if (m_plugin_at_end_of_stream && m_buffer.is_empty())
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return FixedArray<Sample> {};
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size_t remaining_samples = total_samples() - loaded_samples();
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size_t samples_to_read = min(remaining_samples, samples_to_read_from_input);
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auto samples = TRY(FixedArray<Sample>::create(samples_to_read));
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size_t sample_index = 0;
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if (m_buffer.size() > 0) {
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size_t to_transfer = min(m_buffer.size(), samples_to_read);
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AK::TypedTransfer<Sample>::move(samples.data(), m_buffer.data(), to_transfer);
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if (to_transfer < m_buffer.size())
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m_buffer.remove(0, to_transfer);
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else
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m_buffer.clear_with_capacity();
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sample_index += to_transfer;
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}
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while (sample_index < samples_to_read) {
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auto chunk_data = TRY(m_plugin->load_chunks(samples_to_read - sample_index));
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chunk_data.remove_all_matching([](auto& chunk) { return chunk.is_empty(); });
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if (chunk_data.is_empty()) {
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m_plugin_at_end_of_stream = true;
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break;
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}
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for (auto& chunk : chunk_data) {
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if (sample_index < samples_to_read) {
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auto count = min(samples_to_read - sample_index, chunk.size());
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AK::TypedTransfer<Sample>::move(samples.span().offset(sample_index), chunk.data(), count);
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// We didn't read all of the chunk; transfer the rest into the buffer.
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if (count < chunk.size()) {
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auto remaining_samples_count = chunk.size() - count;
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// We will always have an empty buffer at this point!
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TRY(m_buffer.try_append(chunk.span().offset(count), remaining_samples_count));
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}
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} else {
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// We're now past what the user requested. Transfer the entirety of the data into the buffer.
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TRY(m_buffer.try_append(chunk.data(), chunk.size()));
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}
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sample_index += chunk.size();
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}
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}
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return samples;
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}
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}
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