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audio_core: Add configuration settings.

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This commit is contained in:
bunnei 2018-07-30 23:57:53 -04:00
parent f9fec85f81
commit 14d9b2d6d3
12 changed files with 330 additions and 21 deletions
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35
src/audio_core/stream.cpp
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@ -2,14 +2,17 @@
// 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 <algorithm>
#include <cmath>
#include "audio_core/sink.h"
#include "audio_core/sink_details.h"
#include "audio_core/stream.h"
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core_timing.h"
#include "core/core_timing_util.h"
#include "core/settings.h"
namespace AudioCore {
@ -56,6 +59,24 @@ s64 Stream::GetBufferReleaseCycles(const Buffer& buffer) const {
return CoreTiming::usToCycles((static_cast<u64>(num_samples) * 1000000) / sample_rate);
}
static std::vector<s16> GetVolumeAdjustedSamples(const std::vector<u8>& data) {
std::vector<s16> samples(data.size() / sizeof(s16));
std::memcpy(samples.data(), data.data(), data.size());
const float volume{std::clamp(Settings::values.volume, 0.0f, 1.0f)};
if (volume == 1.0f) {
return samples;
}
// Implementation of a volume slider with a dynamic range of 60 dB
const float volume_scale_factor{std::exp(6.90775f * volume) * 0.001f};
for (auto& sample : samples) {
sample = static_cast<s16>(sample * volume_scale_factor);
}
return samples;
}
void Stream::PlayNextBuffer() {
if (!IsPlaying()) {
// Ensure we are in playing state before playing the next buffer
@ -75,9 +96,9 @@ void Stream::PlayNextBuffer() {
active_buffer = queued_buffers.front();
queued_buffers.pop();
sink_stream.EnqueueSamples(GetNumChannels(),
reinterpret_cast<const s16*>(active_buffer->GetData().data()),
active_buffer->GetData().size() / GetSampleSize());
const size_t sample_count{active_buffer->GetData().size() / GetSampleSize()};
sink_stream.EnqueueSamples(
GetNumChannels(), GetVolumeAdjustedSamples(active_buffer->GetData()).data(), sample_count);
CoreTiming::ScheduleEventThreadsafe(GetBufferReleaseCycles(*active_buffer), release_event, {});
}