180 lines
6.4 KiB
C++
180 lines
6.4 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 "JackLibSampleRateResampler.h"
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#include "JackError.h"
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namespace Jack
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{
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JackLibSampleRateResampler::JackLibSampleRateResampler()
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:JackResampler()
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{
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int error;
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fResampler = src_new(SRC_LINEAR, 1, &error);
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if (error != 0) {
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jack_error("JackLibSampleRateResampler::JackLibSampleRateResampler err = %s", src_strerror(error));
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}
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}
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JackLibSampleRateResampler::JackLibSampleRateResampler(unsigned int quality)
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:JackResampler()
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{
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switch (quality) {
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case 0:
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quality = SRC_LINEAR;
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break;
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case 1:
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quality = SRC_ZERO_ORDER_HOLD;
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break;
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case 2:
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quality = SRC_SINC_FASTEST;
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break;
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case 3:
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quality = SRC_SINC_MEDIUM_QUALITY;
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break;
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case 4:
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quality = SRC_SINC_BEST_QUALITY;
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break;
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default:
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quality = SRC_LINEAR;
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jack_error("Out of range resample quality");
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break;
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}
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int error;
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fResampler = src_new(quality, 1, &error);
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if (error != 0) {
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jack_error("JackLibSampleRateResampler::JackLibSampleRateResampler err = %s", src_strerror(error));
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}
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}
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JackLibSampleRateResampler::~JackLibSampleRateResampler()
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{
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src_delete(fResampler);
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}
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void JackLibSampleRateResampler::Reset(unsigned int new_size)
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{
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JackResampler::Reset(new_size);
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src_reset(fResampler);
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}
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unsigned int JackLibSampleRateResampler::ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames)
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{
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jack_ringbuffer_data_t ring_buffer_data[2];
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SRC_DATA src_data;
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unsigned int frames_to_write = frames;
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unsigned int written_frames = 0;
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int res;
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jack_ringbuffer_get_read_vector(fRingBuffer, ring_buffer_data);
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unsigned int available_frames = (ring_buffer_data[0].len + ring_buffer_data[1].len) / sizeof(jack_default_audio_sample_t);
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jack_log("Output available = %ld", available_frames);
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for (int j = 0; j < 2; j++) {
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if (ring_buffer_data[j].len > 0) {
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src_data.data_in = (jack_default_audio_sample_t*)ring_buffer_data[j].buf;
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src_data.data_out = &buffer[written_frames];
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src_data.input_frames = ring_buffer_data[j].len / sizeof(jack_default_audio_sample_t);
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src_data.output_frames = frames_to_write;
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src_data.end_of_input = 0;
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src_data.src_ratio = fRatio;
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res = src_process(fResampler, &src_data);
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if (res != 0) {
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jack_error("JackLibSampleRateResampler::ReadResample ratio = %f err = %s", fRatio, src_strerror(res));
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return 0;
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}
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frames_to_write -= src_data.output_frames_gen;
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written_frames += src_data.output_frames_gen;
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if ((src_data.input_frames_used == 0 || src_data.output_frames_gen == 0) && j == 0) {
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jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
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, j, src_data.input_frames_used, src_data.output_frames_gen, ring_buffer_data[0].len, ring_buffer_data[1].len);
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}
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jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld", j, src_data.input_frames_used, src_data.output_frames_gen);
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jack_ringbuffer_read_advance(fRingBuffer, src_data.input_frames_used * sizeof(jack_default_audio_sample_t));
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}
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}
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if (written_frames < frames) {
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jack_error("Output available = %ld", available_frames);
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jack_error("JackLibSampleRateResampler::ReadResample error written_frames = %ld", written_frames);
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}
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return written_frames;
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}
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unsigned int JackLibSampleRateResampler::WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames)
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{
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jack_ringbuffer_data_t ring_buffer_data[2];
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SRC_DATA src_data;
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unsigned int frames_to_read = frames;
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unsigned int read_frames = 0;
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int res;
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jack_ringbuffer_get_write_vector(fRingBuffer, ring_buffer_data);
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unsigned int available_frames = (ring_buffer_data[0].len + ring_buffer_data[1].len) / sizeof(jack_default_audio_sample_t);
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jack_log("Input available = %ld", available_frames);
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for (int j = 0; j < 2; j++) {
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if (ring_buffer_data[j].len > 0) {
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src_data.data_in = &buffer[read_frames];
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src_data.data_out = (jack_default_audio_sample_t*)ring_buffer_data[j].buf;
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src_data.input_frames = frames_to_read;
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src_data.output_frames = (ring_buffer_data[j].len / sizeof(jack_default_audio_sample_t));
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src_data.end_of_input = 0;
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src_data.src_ratio = fRatio;
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res = src_process(fResampler, &src_data);
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if (res != 0) {
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jack_error("JackLibSampleRateResampler::WriteResample ratio = %f err = %s", fRatio, src_strerror(res));
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return 0;
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}
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frames_to_read -= src_data.input_frames_used;
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read_frames += src_data.input_frames_used;
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if ((src_data.input_frames_used == 0 || src_data.output_frames_gen == 0) && j == 0) {
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jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
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, j, src_data.input_frames_used, src_data.output_frames_gen, ring_buffer_data[0].len, ring_buffer_data[1].len);
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}
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jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld", j, src_data.input_frames_used, src_data.output_frames_gen);
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jack_ringbuffer_write_advance(fRingBuffer, src_data.output_frames_gen * sizeof(jack_default_audio_sample_t));
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}
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}
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if (read_frames < frames) {
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jack_error("Input available = %ld", available_frames);
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jack_error("JackLibSampleRateResampler::WriteResample error read_frames = %ld", read_frames);
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}
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return read_frames;
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}
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}
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