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sound/xaudio2_sound.cpp: Smarter buffer submission algorithm.

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This commit is contained in:
Vas Crabb 2025-05-23 08:58:40 +10:00
parent 321c39ba4c
commit 09c000d65e
1 changed files with 16 additions and 9 deletions
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25
src/osd/modules/sound/xaudio2_sound.cpp
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@ -354,7 +354,7 @@ int sound_xaudio2::init(osd_interface &osd, osd_options const &options)
// get relevant options
m_audio_latency = options.audio_latency();
if (m_audio_latency == 0.0F)
m_audio_latency = 0.1F;
m_audio_latency = 0.03F;
// create a multimedia device enumerator and enumerate devices
HR_GOERR(CoCreateInstance(__uuidof(MMDeviceEnumerator), nullptr, CLSCTX_ALL, IID_PPV_ARGS(&m_device_enum)));
@ -794,8 +794,8 @@ sound_xaudio2::voice_info::voice_info(sound_xaudio2 &h, WAVEFORMATEX const &form
}
// calculate required buffer size
int const audio_latency_ms = std::max(unsigned(m_host.m_audio_latency * 1000.0F + 0.5F), SUBMIT_FREQUENCY_TARGET_MS);
uint32_t const buffer_total = m_sample_bytes * (audio_latency_ms / 1000.0F) * RESAMPLE_TOLERANCE;
int const audio_latency_ms = std::max(unsigned((m_host.m_audio_latency * 1000.0F) + 0.5F), SUBMIT_FREQUENCY_TARGET_MS);
uint32_t const buffer_total = m_sample_bytes * format.nSamplesPerSec * (audio_latency_ms / 1000.0F) * RESAMPLE_TOLERANCE;
m_buffer_count = audio_latency_ms / SUBMIT_FREQUENCY_TARGET_MS;
m_buffer_size = std::max<uint32_t>(1024, buffer_total / m_buffer_count);
@ -873,14 +873,21 @@ void sound_xaudio2::voice_info::submit_if_needed()
m_host.m_overflows.fetch_add(1, std::memory_order_relaxed);
}
// roll the buffer and submit whatever we have queued
roll_buffer();
if (m_buffer_queue.empty())
roll_buffer();
if (!m_buffer_queue.empty())
{
auto &buf = m_buffer_queue.front();
assert(0 < buf.AudioSize);
submit_buffer(std::move(buf.AudioData), buf.AudioSize);
m_buffer_queue.pop();
auto buffers = state.BuffersQueued;
do
{
auto &buf = m_buffer_queue.front();
assert(0 < buf.AudioSize);
submit_buffer(std::move(buf.AudioData), buf.AudioSize);
m_buffer_queue.pop();
buffers++;
}
while (!m_buffer_queue.empty() && (2 > buffers));
}
}