7cfbdcf184
Allows inverting the polarity of the audio data, which can be useful for ether purposefully canceling out audio or preventing audio cancellation. Amends pull request obsproject/obs-studio#1404
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
#include <obs-module.h>
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static const char *invert_polarity_name(void *unused)
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{
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UNUSED_PARAMETER(unused);
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return obs_module_text("InvertPolarity");
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}
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static void invert_polarity_destroy(void *data)
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{
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UNUSED_PARAMETER(data);
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}
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static void *invert_polarity_create(obs_data_t *settings, obs_source_t *filter)
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{
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UNUSED_PARAMETER(settings);
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return filter;
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}
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static struct obs_audio_data *invert_polarity_filter_audio(void *unused,
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struct obs_audio_data *audio)
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{
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float **adata = (float**)audio->data;
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for (size_t c = 0; c < MAX_AV_PLANES; c++) {
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register float *channel_data = adata[c];
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register float *channel_end = channel_data + audio->frames;
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if (!channel_data)
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break;
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while (channel_data < channel_end) {
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*(channel_data++) *= -1.0f;
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}
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}
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UNUSED_PARAMETER(unused);
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return audio;
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}
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struct obs_source_info invert_polarity_filter = {
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.id = "invert_polarity_filter",
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.type = OBS_SOURCE_TYPE_FILTER,
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.output_flags = OBS_SOURCE_AUDIO,
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.get_name = invert_polarity_name,
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.create = invert_polarity_create,
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.destroy = invert_polarity_destroy,
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.filter_audio = invert_polarity_filter_audio,
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};
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