feat: add per-channel audio capture with OPL/FM voice isolation#35
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pedrocatalao wants to merge 2 commits into
Open
feat: add per-channel audio capture with OPL/FM voice isolation#35pedrocatalao wants to merge 2 commits into
pedrocatalao wants to merge 2 commits into
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Adds opt-in per-channel audio isolation for both PCM and OPL/FM synthesis
paths, accessible via the "render.channel_capture" CTL.
PCM isolation: CSoundFile::CreateStereoMix() snapshots MixSoundBuffer
before and after each MixChannel() call, accumulating each channel's
isolated contribution in m_channelCaptureBuf.
OPL/FM isolation: Opal::Output() captures each voice's left-channel value
before summation into m_voiceOut[]. OPL::Mix() reads these per-frame and
stores them in m_voiceFrames[voice][frame], scaled to mix-buffer amplitude.
New public API (C and C++):
get_current_channel_audio_mono(channel, count, buf)
get_current_channel_audio_stereo(channel, count, buf_left, buf_right)
Both functions combine PCM and OPL contributions transparently, so callers
do not need to know which synthesis path a channel is using. Data is valid
after read() and before the next read() call.
Usage:
module.ctl_set_boolean("render.channel_capture", true);
module.read_float_mono(samplerate, count, master_out);
module.get_current_channel_audio_mono(ch, count, ch_out);
…ce output fallback logic
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Adds opt-in per-channel audio isolation for both PCM and OPL/FM synthesis paths, accessible via the "render.channel_capture" CTL.
PCM isolation: CSoundFile::CreateStereoMix() snapshots MixSoundBuffer before and after each MixChannel() call, accumulating each channel's isolated contribution in m_channelCaptureBuf.
OPL/FM isolation: Opal::Output() captures each voice's left-channel value before summation into m_voiceOut[]. OPL::Mix() reads these per-frame and stores them in m_voiceFrames[voice][frame], scaled to mix-buffer amplitude.
New public API (C and C++):
get_current_channel_audio_mono(channel, count, buf)
get_current_channel_audio_stereo(channel, count, buf_left, buf_right)
Both functions combine PCM and OPL contributions transparently, so callers do not need to know which synthesis path a channel is using. Data is valid after read() and before the next read() call.
Usage:
module.ctl_set_boolean("render.channel_capture", true);
module.read_float_mono(samplerate, count, master_out);
module.get_current_channel_audio_mono(ch, count, ch_out);