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Code Issues Releases Activity

cubeb_sink: Use RingBuffer

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This commit is contained in:
MerryMage 2018-09-08 14:55:11 +01:00
parent 112351d557
commit 6d9dd1dc6d
1 changed files with 26 additions and 40 deletions
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66
src/audio_core/cubeb_sink.cpp
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@ -4,18 +4,17 @@
#include <algorithm>
#include <cstring>
#include <mutex>
#include "audio_core/cubeb_sink.h"
#include "audio_core/stream.h"
#include "common/logging/log.h"
#include "common/ring_buffer.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)
CubebSinkStream(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) {
@ -38,7 +37,7 @@ 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 +49,7 @@ public:
}
}
~SinkStreamImpl() {
~CubebSinkStream() {
if (!ctx) {
return;
}
@ -63,33 +62,27 @@ public:
}
void EnqueueSamples(u32 num_channels, const std::vector<s16>& samples) override {
if (!ctx) {
return;
}
std::lock_guard lock{queue_mutex};
queue.reserve(queue.size() + samples.size() * GetNumChannels());
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);
std::vector<s16> buf;
buf.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]);
buf.push_back(samples[i]);
buf.push_back(samples[i + 1]);
}
} else {
// Copy as-is
std::copy(samples.begin(), samples.end(), std::back_inserter(queue));
queue.Push(buf);
return;
}
queue.Push(samples);
}
size_t SamplesInQueue(u32 num_channels) const {
size_t SamplesInQueue(u32 num_channels) const override {
if (!ctx)
return 0;
return queue.size() / num_channels;
return queue.Size() / num_channels;
}
u32 GetNumChannels() const {
@ -104,8 +97,7 @@ private:
u32 num_channels{};
bool is_6_channel{};
std::mutex queue_mutex;
std::vector<s16> queue;
Common::RingBuffer<s16, 0x10000> queue;
static long DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames);
@ -151,38 +143,32 @@ 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,
long CubebSinkStream::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames) {
SinkStreamImpl* impl = static_cast<SinkStreamImpl*>(user_data);
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 max_samples_to_write = impl->GetNumChannels() * num_frames;
const size_t samples_written = impl->queue.Pop(buffer, max_samples_to_write);
const size_t frames_to_write{
std::min(impl->queue.size() / impl->GetNumChannels(), static_cast<size_t>(num_frames))};
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 (frames_to_write < num_frames) {
if (samples_written < max_samples_to_write) {
// 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());
std::memset(buffer + samples_written * sizeof(s16), 0,
(max_samples_to_write - samples_written) * 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;