125 lines
4.0 KiB
C++
125 lines
4.0 KiB
C++
/*
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Copyright (C) 2008 Grame
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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 General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "JackResampler.h"
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#include <stdio.h>
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namespace Jack
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{
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JackResampler::JackResampler()
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:fRatio(1), fRingBufferSize(DEFAULT_RB_SIZE)
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{
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fRingBuffer = jack_ringbuffer_create(sizeof(jack_default_audio_sample_t) * fRingBufferSize);
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jack_ringbuffer_read_advance(fRingBuffer, (sizeof(jack_default_audio_sample_t) * fRingBufferSize) / 2);
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}
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JackResampler::~JackResampler()
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{
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if (fRingBuffer) {
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jack_ringbuffer_free(fRingBuffer);
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}
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}
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void JackResampler::Reset(unsigned int new_size)
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{
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fRingBufferSize = new_size;
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jack_ringbuffer_reset(fRingBuffer);
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jack_ringbuffer_reset_size(fRingBuffer, sizeof(jack_default_audio_sample_t) * fRingBufferSize);
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jack_ringbuffer_read_advance(fRingBuffer, (sizeof(jack_default_audio_sample_t) * fRingBufferSize / 2));
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}
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unsigned int JackResampler::ReadSpace()
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{
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return (jack_ringbuffer_read_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
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}
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unsigned int JackResampler::WriteSpace()
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{
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return (jack_ringbuffer_write_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
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}
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unsigned int JackResampler::Read(jack_default_audio_sample_t* buffer, unsigned int frames)
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{
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size_t len = jack_ringbuffer_read_space(fRingBuffer);
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jack_log("JackResampler::Read input available = %ld", len / sizeof(jack_default_audio_sample_t));
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if (len < frames * sizeof(jack_default_audio_sample_t)) {
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jack_error("JackResampler::Read : producer too slow, missing frames = %d", frames);
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return 0;
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} else {
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jack_ringbuffer_read(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
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return frames;
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}
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}
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unsigned int JackResampler::Write(jack_default_audio_sample_t* buffer, unsigned int frames)
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{
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size_t len = jack_ringbuffer_write_space(fRingBuffer);
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jack_log("JackResampler::Write output available = %ld", len / sizeof(jack_default_audio_sample_t));
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if (len < frames * sizeof(jack_default_audio_sample_t)) {
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jack_error("JackResampler::Write : consumer too slow, skip frames = %d", frames);
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return 0;
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} else {
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jack_ringbuffer_write(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
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return frames;
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}
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}
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unsigned int JackResampler::Read(void* buffer, unsigned int bytes)
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{
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size_t len = jack_ringbuffer_read_space(fRingBuffer);
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jack_log("JackResampler::Read input available = %ld", len);
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if (len < bytes) {
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jack_error("JackResampler::Read : producer too slow, missing bytes = %d", bytes);
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return 0;
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} else {
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jack_ringbuffer_read(fRingBuffer, (char*)buffer, bytes);
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return bytes;
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}
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}
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unsigned int JackResampler::Write(void* buffer, unsigned int bytes)
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{
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size_t len = jack_ringbuffer_write_space(fRingBuffer);
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jack_log("JackResampler::Write output available = %ld", len);
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if (len < bytes) {
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jack_error("JackResampler::Write : consumer too slow, skip bytes = %d", bytes);
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return 0;
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} else {
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jack_ringbuffer_write(fRingBuffer, (char*)buffer, bytes);
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return bytes;
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}
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}
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unsigned int JackResampler::ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames)
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{
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return Read(buffer, frames);
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}
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unsigned int JackResampler::WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames)
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{
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return Write(buffer, frames);
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}
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}
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