mirror of
https://github.com/RGBCube/serenity
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faf7331999
It seems like this happens in quite some valid situations, so my initially sensible failsafe doesn't make sense. As the buffer system is hopefully gone soon, it won't be an issue in the future either way.
139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, 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 "PlaybackManager.h"
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PlaybackManager::PlaybackManager(NonnullRefPtr<Audio::ConnectionFromClient> connection)
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: m_connection(connection)
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{
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m_timer = Core::Timer::construct(PlaybackManager::update_rate_ms, [&]() {
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if (!m_loader)
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return;
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// Make sure that we have some buffers queued up at all times: an audio dropout is the last thing we want.
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if (m_enqueued_buffers.size() < always_enqueued_buffer_count)
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next_buffer();
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});
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m_connection->on_finish_playing_buffer = [this](auto finished_buffer) {
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auto last_buffer_in_queue = m_enqueued_buffers.dequeue();
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// A fail here would mean that the server skipped one of our buffers, which is BAD.
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if (last_buffer_in_queue != finished_buffer)
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dbgln("Never heard back about buffer {}, what happened?", last_buffer_in_queue);
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next_buffer();
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};
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m_timer->stop();
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m_device_sample_rate = connection->get_sample_rate();
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}
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void PlaybackManager::set_loader(NonnullRefPtr<Audio::Loader>&& loader)
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{
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stop();
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m_loader = loader;
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if (m_loader) {
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m_total_length = m_loader->total_samples() / static_cast<float>(m_loader->sample_rate());
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m_device_samples_per_buffer = PlaybackManager::buffer_size_ms / 1000.0f * m_device_sample_rate;
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u32 source_samples_per_buffer = PlaybackManager::buffer_size_ms / 1000.0f * m_loader->sample_rate();
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m_source_buffer_size_bytes = source_samples_per_buffer * m_loader->num_channels() * m_loader->bits_per_sample() / 8;
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m_resampler = Audio::ResampleHelper<double>(m_loader->sample_rate(), m_device_sample_rate);
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m_timer->start();
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} else {
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m_timer->stop();
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}
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}
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void PlaybackManager::stop()
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{
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set_paused(true);
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m_connection->clear_buffer(true);
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m_last_seek = 0;
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m_current_buffer = nullptr;
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if (m_loader)
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(void)m_loader->reset();
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}
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void PlaybackManager::play()
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{
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set_paused(false);
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}
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void PlaybackManager::loop(bool loop)
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{
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m_loop = loop;
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}
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void PlaybackManager::seek(const int position)
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{
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if (!m_loader)
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return;
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m_last_seek = position;
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bool paused_state = m_paused;
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set_paused(true);
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m_connection->clear_buffer(true);
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m_current_buffer = nullptr;
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[[maybe_unused]] auto result = m_loader->seek(position);
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if (!paused_state)
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set_paused(false);
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}
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void PlaybackManager::pause()
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{
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set_paused(true);
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}
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void PlaybackManager::set_paused(bool paused)
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{
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m_paused = paused;
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m_connection->set_paused(paused);
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}
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bool PlaybackManager::toggle_pause()
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{
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if (m_paused) {
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play();
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} else {
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pause();
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}
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return m_paused;
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}
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void PlaybackManager::next_buffer()
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{
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if (on_update)
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on_update();
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if (m_paused)
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return;
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u32 audio_server_remaining_samples = m_connection->get_remaining_samples();
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bool all_samples_loaded = (m_loader->loaded_samples() >= m_loader->total_samples());
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bool audio_server_done = (audio_server_remaining_samples == 0);
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if (all_samples_loaded && audio_server_done) {
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stop();
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if (on_finished_playing)
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on_finished_playing();
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return;
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}
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if (audio_server_remaining_samples < m_device_samples_per_buffer * always_enqueued_buffer_count) {
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auto maybe_buffer = m_loader->get_more_samples(m_source_buffer_size_bytes);
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if (!maybe_buffer.is_error()) {
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m_current_buffer = maybe_buffer.release_value();
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VERIFY(m_resampler.has_value());
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m_resampler->reset();
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// FIXME: Handle OOM better.
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m_current_buffer = MUST(Audio::resample_buffer(m_resampler.value(), *m_current_buffer));
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m_connection->enqueue(*m_current_buffer);
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m_enqueued_buffers.enqueue(m_current_buffer->id());
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}
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}
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}
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