107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
/* Copyright (C) 2015-2017 Sergey V. Mikayev
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "SoxrAdapter.h"
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#include "../Synth.h"
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using namespace MT32Emu;
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static const unsigned int CHANNEL_COUNT = 2;
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size_t SoxrAdapter::getInputSamples(void *input_fn_state, soxr_in_t *data, size_t requested_len) {
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unsigned int length = requested_len < 1 ? 1 : (MAX_SAMPLES_PER_RUN < requested_len ? MAX_SAMPLES_PER_RUN : static_cast<unsigned int>(requested_len));
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SoxrAdapter *instance = static_cast<SoxrAdapter *>(input_fn_state);
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instance->synth.render(instance->inBuffer, length);
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*data = instance->inBuffer;
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return length;
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}
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SoxrAdapter::SoxrAdapter(Synth &useSynth, double targetSampleRate, SamplerateConversionQuality quality) :
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synth(useSynth),
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inBuffer(new float[CHANNEL_COUNT * MAX_SAMPLES_PER_RUN])
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{
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soxr_io_spec_t ioSpec = soxr_io_spec(SOXR_FLOAT32_I, SOXR_FLOAT32_I);
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unsigned long qualityRecipe;
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switch (quality) {
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case SamplerateConversionQuality_FASTEST:
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qualityRecipe = SOXR_QQ;
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break;
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case SamplerateConversionQuality_FAST:
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qualityRecipe = SOXR_LQ;
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break;
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case SamplerateConversionQuality_GOOD:
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qualityRecipe = SOXR_MQ;
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break;
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case SamplerateConversionQuality_BEST:
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default:
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qualityRecipe = SOXR_16_BITQ;
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break;
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};
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soxr_quality_spec_t qSpec = soxr_quality_spec(qualityRecipe, 0);
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soxr_runtime_spec_t rtSpec = soxr_runtime_spec(1);
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soxr_error_t error;
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resampler = soxr_create(synth.getStereoOutputSampleRate(), targetSampleRate, CHANNEL_COUNT, &error, &ioSpec, &qSpec, &rtSpec);
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if (error != NULL) {
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synth.printDebug("SoxrAdapter: Creation of SOXR instance failed: %s\n", soxr_strerror(error));
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soxr_delete(resampler);
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resampler = NULL;
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return;
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}
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error = soxr_set_input_fn(resampler, getInputSamples, this, MAX_SAMPLES_PER_RUN);
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if (error != NULL) {
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synth.printDebug("SoxrAdapter: Installing sample feed for SOXR failed: %s\n", soxr_strerror(error));
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soxr_delete(resampler);
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resampler = NULL;
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}
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}
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SoxrAdapter::~SoxrAdapter() {
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delete[] inBuffer;
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if (resampler != NULL) {
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soxr_delete(resampler);
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}
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}
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void SoxrAdapter::getOutputSamples(float *buffer, unsigned int length) {
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if (resampler == NULL) {
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Synth::muteSampleBuffer(buffer, CHANNEL_COUNT * length);
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return;
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}
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while (length > 0) {
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size_t gotFrames = soxr_output(resampler, buffer, size_t(length));
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soxr_error_t error = soxr_error(resampler);
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if (error != NULL) {
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synth.printDebug("SoxrAdapter: SOXR error during processing: %s > resetting\n", soxr_strerror(error));
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error = soxr_clear(resampler);
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if (error != NULL) {
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synth.printDebug("SoxrAdapter: SOXR failed to reset: %s\n", soxr_strerror(error));
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soxr_delete(resampler);
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resampler = NULL;
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Synth::muteSampleBuffer(buffer, CHANNEL_COUNT * length);
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synth.printDebug("SoxrAdapter: SOXR disabled\n");
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return;
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}
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continue;
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}
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if (gotFrames == 0) {
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synth.printDebug("SoxrAdapter: got 0 frames from SOXR, weird\n");
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}
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buffer += CHANNEL_COUNT * gotFrames;
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length -= static_cast<unsigned int>(gotFrames);
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}
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}
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