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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Types.h>
#include <LibAudio/ClientConnection.h>
#include <LibAudio/Loader.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/EventLoop.h>
#include <LibMain/Main.h>
#include <stdio.h>
// The Kernel has issues with very large anonymous buffers.
// FIXME: This appears to be fine for now, but it's really a hack.
constexpr size_t LOAD_CHUNK_SIZE = 128 * KiB;
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
const char* path = nullptr;
bool should_loop = false;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(path, "Path to audio file", "path");
args_parser.add_option(should_loop, "Loop playback", "loop", 'l');
args_parser.parse(arguments);
Core::EventLoop loop;
auto audio_client = Audio::ClientConnection::construct();
auto maybe_loader = Audio::Loader::create(path);
if (maybe_loader.is_error()) {
warnln("Failed to load audio file: {}", maybe_loader.error().description);
return 1;
}
auto loader = maybe_loader.release_value();
outln("\033[34;1m Playing\033[0m: {}", path);
outln("\033[34;1m Format\033[0m: {} {} Hz, {}-bit, {}",
loader->format_name(),
loader->sample_rate(),
loader->bits_per_sample(),
loader->num_channels() == 1 ? "Mono" : "Stereo");
out("\033[34;1mProgress\033[0m: \033[s");
auto resampler = Audio::ResampleHelper<double>(loader->sample_rate(), audio_client->get_sample_rate());
// If we're downsampling, we need to appropriately load more samples at once.
size_t const load_size = static_cast<size_t>(LOAD_CHUNK_SIZE * static_cast<double>(loader->sample_rate()) / static_cast<double>(audio_client->get_sample_rate()));
// We assume that the loader can load samples at at least 2x speed (testing confirms 9x-12x for FLAC, 14x for WAV).
// Therefore, when the server-side buffer can only play as long as the time it takes us to load a chunk,
// we give it new data.
int const min_buffer_size = load_size / 2;
for (;;) {
auto samples = loader->get_more_samples(load_size);
if (!samples.is_error()) {
if (samples.value()->sample_count() > 0) {
// We can read and enqueue more samples
out("\033[u");
out("{}/{}", loader->loaded_samples(), loader->total_samples());
fflush(stdout);
resampler.reset();
auto resampled_samples = TRY(Audio::resample_buffer(resampler, *samples.value()));
audio_client->async_enqueue(*resampled_samples);
} else if (should_loop) {
// We're done: now loop
auto result = loader->reset();
if (result.is_error()) {
outln();
outln("Error while resetting: {} (at {:x})", result.error().description, result.error().index);
}
} else if (samples.value()->sample_count() == 0 && audio_client->get_remaining_samples() == 0) {
// We're done and the server is done
break;
}
while (audio_client->get_remaining_samples() > min_buffer_size) {
// The server has enough data for now
sleep(1);
}
} else {
outln();
outln("Error: {} (at {:x})", samples.error().description, samples.error().index);
return 1;
}
}
outln();
return 0;
}
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