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author | MerryMage <MerryMage@users.noreply.github.com> | 2018-09-08 17:49:04 +0200 |
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committer | MerryMage <MerryMage@users.noreply.github.com> | 2018-09-08 19:56:38 +0200 |
commit | 1aa195a9c0416c986c8224d9dc66d9d5e45401a0 (patch) | |
tree | 4cd60ccf28c9ab8aeaddce0eb16be3a831ba9196 /src/audio_core/time_stretch.cpp | |
parent | audio_core: Add audio stretcher (diff) | |
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Diffstat (limited to 'src/audio_core/time_stretch.cpp')
-rw-r--r-- | src/audio_core/time_stretch.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/audio_core/time_stretch.cpp b/src/audio_core/time_stretch.cpp index 17e128323..d2e3391c1 100644 --- a/src/audio_core/time_stretch.cpp +++ b/src/audio_core/time_stretch.cpp @@ -28,8 +28,8 @@ size_t TimeStretcher::Process(const s16* in, size_t num_in, s16* out, size_t num // We were given actual_samples number of samples, and num_samples were requested from us. double current_ratio = static_cast<double>(num_in) / static_cast<double>(num_out); - const double max_latency = 0.3; // seconds - const double max_backlog = m_sample_rate * max_latency / 1000.0 / m_stretch_ratio; + const double max_latency = 1.0; // seconds + const double max_backlog = m_sample_rate * max_latency; const double backlog_fullness = m_sound_touch.numSamples() / max_backlog; if (backlog_fullness > 5.0) { // Too many samples in backlog: Don't push anymore on @@ -49,13 +49,13 @@ size_t TimeStretcher::Process(const s16* in, size_t num_in, s16* out, size_t num const double lpf_gain = 1.0 - std::exp(-time_delta / lpf_time_scale); m_stretch_ratio += lpf_gain * (current_ratio - m_stretch_ratio); - // Place a lower limit of 10% speed. When a game boots up, there will be + // Place a lower limit of 5% speed. When a game boots up, there will be // many silence samples. These do not need to be timestretched. - m_stretch_ratio = std::max(m_stretch_ratio, 0.1); + m_stretch_ratio = std::max(m_stretch_ratio, 0.05); m_sound_touch.setTempo(m_stretch_ratio); - LOG_DEBUG(Audio, "Audio Stretching: samples:{}/{} ratio:{} backlog:{} gain: {}", num_in, num_out, - m_stretch_ratio, backlog_fullness, lpf_gain); + LOG_DEBUG(Audio, "{:5}/{:5} ratio:{:0.6f} backlog:{:0.6f}", num_in, num_out, m_stretch_ratio, + backlog_fullness); m_sound_touch.putSamples(in, num_in); return m_sound_touch.receiveSamples(out, num_out); |