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Diffstat (limited to 'src/audio_core/cubeb_sink.cpp')
-rw-r--r--src/audio_core/cubeb_sink.cpp114
1 files changed, 65 insertions, 49 deletions
diff --git a/src/audio_core/cubeb_sink.cpp b/src/audio_core/cubeb_sink.cpp
index 5a1177d0c..79155a7a0 100644
--- a/src/audio_core/cubeb_sink.cpp
+++ b/src/audio_core/cubeb_sink.cpp
@@ -3,27 +3,23 @@
// Refer to the license.txt file included.
#include <algorithm>
+#include <atomic>
#include <cstring>
-#include <mutex>
-
#include "audio_core/cubeb_sink.h"
#include "audio_core/stream.h"
+#include "audio_core/time_stretch.h"
#include "common/logging/log.h"
+#include "common/ring_buffer.h"
+#include "core/settings.h"
namespace AudioCore {
-class SinkStreamImpl final : public SinkStream {
+class CubebSinkStream final : public SinkStream {
public:
- SinkStreamImpl(cubeb* ctx, u32 sample_rate, u32 num_channels_, cubeb_devid output_device,
- const std::string& name)
- : ctx{ctx}, num_channels{num_channels_} {
-
- if (num_channels == 6) {
- // 6-channel audio does not seem to work with cubeb + SDL, so we downsample this to 2
- // channel for now
- is_6_channel = true;
- num_channels = 2;
- }
+ CubebSinkStream(cubeb* ctx, u32 sample_rate, u32 num_channels_, cubeb_devid output_device,
+ const std::string& name)
+ : ctx{ctx}, num_channels{std::min(num_channels_, 2u)}, time_stretch{sample_rate,
+ num_channels} {
cubeb_stream_params params{};
params.rate = sample_rate;
@@ -38,7 +34,7 @@ public:
if (cubeb_stream_init(ctx, &stream_backend, name.c_str(), nullptr, nullptr, output_device,
&params, std::max(512u, minimum_latency),
- &SinkStreamImpl::DataCallback, &SinkStreamImpl::StateCallback,
+ &CubebSinkStream::DataCallback, &CubebSinkStream::StateCallback,
this) != CUBEB_OK) {
LOG_CRITICAL(Audio_Sink, "Error initializing cubeb stream");
return;
@@ -50,7 +46,7 @@ public:
}
}
- ~SinkStreamImpl() {
+ ~CubebSinkStream() {
if (!ctx) {
return;
}
@@ -62,27 +58,32 @@ public:
cubeb_stream_destroy(stream_backend);
}
- void EnqueueSamples(u32 num_channels, const std::vector<s16>& samples) override {
- if (!ctx) {
+ void EnqueueSamples(u32 source_num_channels, const std::vector<s16>& samples) override {
+ if (source_num_channels > num_channels) {
+ // Downsample 6 channels to 2
+ std::vector<s16> buf;
+ buf.reserve(samples.size() * num_channels / source_num_channels);
+ for (size_t i = 0; i < samples.size(); i += source_num_channels) {
+ for (size_t ch = 0; ch < num_channels; ch++) {
+ buf.push_back(samples[i + ch]);
+ }
+ }
+ queue.Push(buf);
return;
}
- std::lock_guard lock{queue_mutex};
+ queue.Push(samples);
+ }
- queue.reserve(queue.size() + samples.size() * GetNumChannels());
+ size_t SamplesInQueue(u32 num_channels) const override {
+ if (!ctx)
+ return 0;
- if (is_6_channel) {
- // Downsample 6 channels to 2
- const size_t sample_count_copy_size = samples.size() * 2;
- queue.reserve(sample_count_copy_size);
- for (size_t i = 0; i < samples.size(); i += num_channels) {
- queue.push_back(samples[i]);
- queue.push_back(samples[i + 1]);
- }
- } else {
- // Copy as-is
- std::copy(samples.begin(), samples.end(), std::back_inserter(queue));
- }
+ return queue.Size() / num_channels;
+ }
+
+ void Flush() override {
+ should_flush = true;
}
u32 GetNumChannels() const {
@@ -95,10 +96,11 @@ private:
cubeb* ctx{};
cubeb_stream* stream_backend{};
u32 num_channels{};
- bool is_6_channel{};
- std::mutex queue_mutex;
- std::vector<s16> queue;
+ Common::RingBuffer<s16, 0x10000> queue;
+ std::array<s16, 2> last_frame;
+ std::atomic<bool> should_flush{};
+ TimeStretcher time_stretch;
static long DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames);
@@ -144,38 +146,52 @@ CubebSink::~CubebSink() {
SinkStream& CubebSink::AcquireSinkStream(u32 sample_rate, u32 num_channels,
const std::string& name) {
sink_streams.push_back(
- std::make_unique<SinkStreamImpl>(ctx, sample_rate, num_channels, output_device, name));
+ std::make_unique<CubebSinkStream>(ctx, sample_rate, num_channels, output_device, name));
return *sink_streams.back();
}
-long SinkStreamImpl::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
- void* output_buffer, long num_frames) {
- SinkStreamImpl* impl = static_cast<SinkStreamImpl*>(user_data);
+long CubebSinkStream::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
+ void* output_buffer, long num_frames) {
+ CubebSinkStream* impl = static_cast<CubebSinkStream*>(user_data);
u8* buffer = reinterpret_cast<u8*>(output_buffer);
if (!impl) {
return {};
}
- std::lock_guard lock{impl->queue_mutex};
+ const size_t num_channels = impl->GetNumChannels();
+ const size_t samples_to_write = num_channels * num_frames;
+ size_t samples_written;
+
+ if (Settings::values.enable_audio_stretching) {
+ const std::vector<s16> in{impl->queue.Pop()};
+ const size_t num_in{in.size() / num_channels};
+ s16* const out{reinterpret_cast<s16*>(buffer)};
+ const size_t out_frames = impl->time_stretch.Process(in.data(), num_in, out, num_frames);
+ samples_written = out_frames * num_channels;
- const size_t frames_to_write{
- std::min(impl->queue.size() / impl->GetNumChannels(), static_cast<size_t>(num_frames))};
+ if (impl->should_flush) {
+ impl->time_stretch.Flush();
+ impl->should_flush = false;
+ }
+ } else {
+ samples_written = impl->queue.Pop(buffer, samples_to_write);
+ }
- memcpy(buffer, impl->queue.data(), frames_to_write * sizeof(s16) * impl->GetNumChannels());
- impl->queue.erase(impl->queue.begin(),
- impl->queue.begin() + frames_to_write * impl->GetNumChannels());
+ if (samples_written >= num_channels) {
+ std::memcpy(&impl->last_frame[0], buffer + (samples_written - num_channels) * sizeof(s16),
+ num_channels * sizeof(s16));
+ }
- if (frames_to_write < num_frames) {
- // Fill the rest of the frames with silence
- memset(buffer + frames_to_write * sizeof(s16) * impl->GetNumChannels(), 0,
- (num_frames - frames_to_write) * sizeof(s16) * impl->GetNumChannels());
+ // Fill the rest of the frames with last_frame
+ for (size_t i = samples_written; i < samples_to_write; i += num_channels) {
+ std::memcpy(buffer + i * sizeof(s16), &impl->last_frame[0], num_channels * sizeof(s16));
}
return num_frames;
}
-void SinkStreamImpl::StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state) {}
+void CubebSinkStream::StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state) {}
std::vector<std::string> ListCubebSinkDevices() {
std::vector<std::string> device_list;
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-19 05:28:42 +0200