New upstream version 19.0.3+dfsg1

UI/frontend-plugins/frontend-tools/captions-handler.cpp

@@ -0,0 +1,54 @@
+#include "captions-handler.hpp"
+
+captions_handler::captions_handler(
+		captions_cb       callback,
+		enum audio_format format,
+		uint32_t          sample_rate)
+	: cb(callback)
+{
+	if (!reset_resampler(format, sample_rate))
+		throw CAPTIONS_ERROR_GENERIC_FAIL;
+}
+
+bool captions_handler::reset_resampler(
+		enum audio_format format,
+		uint32_t sample_rate)
+try {
+	obs_audio_info ai;
+	if (!obs_get_audio_info(&ai))
+		throw std::string("Failed to get OBS audio info");
+
+	resample_info src = {
+		ai.samples_per_sec,
+		AUDIO_FORMAT_FLOAT_PLANAR,
+		ai.speakers
+	};
+	resample_info dst = {
+		sample_rate,
+		format,
+		SPEAKERS_MONO
+	};
+
+	if (!resampler.reset(dst, src))
+		throw std::string("Failed to create audio resampler");
+
+	return true;
+
+} catch (std::string text) {
+	blog(LOG_WARNING, "%s: %s", __FUNCTION__, text.c_str());
+	return false;
+}
+
+void captions_handler::push_audio(const audio_data *audio)
+{
+	uint8_t *out[MAX_AV_PLANES];
+	uint32_t frames;
+	uint64_t ts_offset;
+	bool success;
+
+	success = audio_resampler_resample(resampler,
+			out, &frames, &ts_offset,
+			(const uint8_t *const *)audio->data, audio->frames);
+	if (success)
+		pcm_data(out[0], frames);
+}