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audio_core: Simplify sink interface

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This commit is contained in:
MerryMage 2018-09-08 21:07:28 +01:00
parent 761ef78408
commit f34711219a
8 changed files with 42 additions and 131 deletions
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40
src/audio_core/cubeb_sink.cpp
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@ -13,13 +13,11 @@ namespace AudioCore {
struct CubebSink::Impl {
unsigned int sample_rate = 0;
std::vector<std::string> device_list;
cubeb* ctx = nullptr;
cubeb_stream* stream = nullptr;
std::mutex queue_mutex;
std::vector<s16> queue;
std::function<void(s16*, std::size_t)> cb;
static long DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames);
@ -95,45 +93,19 @@ unsigned int CubebSink::GetNativeSampleRate() const {
return impl->sample_rate;
}
void CubebSink::EnqueueSamples(const s16* samples, std::size_t sample_count) {
if (!impl->ctx)
return;
std::lock_guard lock{impl->queue_mutex};
impl->queue.reserve(impl->queue.size() + sample_count * 2);
std::copy(samples, samples + sample_count * 2, std::back_inserter(impl->queue));
}
size_t CubebSink::SamplesInQueue() const {
if (!impl->ctx)
return 0;
std::lock_guard lock{impl->queue_mutex};
return impl->queue.size() / 2;
void CubebSink::SetCallback(std::function<void(s16*, std::size_t)> cb) {
impl->cb = cb;
}
long CubebSink::Impl::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames) {
Impl* impl = static_cast<Impl*>(user_data);
u8* buffer = reinterpret_cast<u8*>(output_buffer);
s16* buffer = reinterpret_cast<s16*>(output_buffer);
if (!impl)
if (!impl || !impl->cb)
return 0;
std::lock_guard lock{impl->queue_mutex};
std::size_t frames_to_write =
std::min(impl->queue.size() / 2, static_cast<std::size_t>(num_frames));
memcpy(buffer, impl->queue.data(), frames_to_write * sizeof(s16) * 2);
impl->queue.erase(impl->queue.begin(), impl->queue.begin() + frames_to_write * 2);
if (frames_to_write < num_frames) {
// Fill the rest of the frames with silence
memset(buffer + frames_to_write * sizeof(s16) * 2, 0,
(num_frames - frames_to_write) * sizeof(s16) * 2);
}
impl->cb(buffer, num_frames);
return num_frames;
}