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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core_timing.h"
#include "core/core_timing_util.h"
#include "audio_core/stream.h"
namespace AudioCore {
constexpr size_t MaxAudioBufferCount{32};
/// Returns the sample size for the specified audio stream format
static size_t SampleSizeFromFormat(Stream::Format format) {
switch (format) {
case Stream::Format::Mono16:
return 2;
case Stream::Format::Stereo16:
return 4;
case Stream::Format::Multi51Channel16:
return 12;
};
LOG_CRITICAL(Audio, "Unimplemented format={}", static_cast<u32>(format));
UNREACHABLE();
return {};
}
Stream::Stream(int sample_rate, Format format, ReleaseCallback&& release_callback)
: sample_rate{sample_rate}, format{format}, release_callback{std::move(release_callback)} {
release_event = CoreTiming::RegisterEvent(
"Stream::Release", [this](u64 userdata, int cycles_late) { ReleaseActiveBuffer(); });
}
void Stream::Play() {
state = State::Playing;
PlayNextBuffer();
}
void Stream::Stop() {
ASSERT_MSG(false, "Unimplemented");
}
s64 Stream::GetBufferReleaseCycles(const Buffer& buffer) const {
const size_t num_samples{buffer.GetData().size() / SampleSizeFromFormat(format)};
return CoreTiming::usToCycles((static_cast<u64>(num_samples) * 1000000) / sample_rate);
}
void Stream::PlayNextBuffer() {
if (!IsPlaying()) {
// Ensure we are in playing state before playing the next buffer
return;
}
if (active_buffer) {
// Do not queue a new buffer if we are already playing a buffer
return;
}
if (queued_buffers.empty()) {
// No queued buffers - we are effectively paused
return;
}
active_buffer = queued_buffers.front();
queued_buffers.pop();
CoreTiming::ScheduleEventThreadsafe(GetBufferReleaseCycles(*active_buffer), release_event, {});
}
void Stream::ReleaseActiveBuffer() {
released_buffers.push(std::move(active_buffer));
release_callback();
PlayNextBuffer();
}
bool Stream::QueueBuffer(BufferPtr&& buffer) {
if (queued_buffers.size() < MaxAudioBufferCount) {
queued_buffers.push(std::move(buffer));
PlayNextBuffer();
return true;
}
return false;
}
bool Stream::ContainsBuffer(Buffer::Tag tag) const {
ASSERT_MSG(false, "Unimplemented");
return {};
}
std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers(size_t max_count) {
std::vector<Buffer::Tag> tags;
for (size_t count = 0; count < max_count && !released_buffers.empty(); ++count) {
tags.push_back(released_buffers.front()->GetTag());
released_buffers.pop();
}
return tags;
}
} // namespace AudioCore
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