JackResampler.cpp
/*
Copyright (C) 2008 Grame
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "JackResampler.h"
#include "JackError.h"
#include <stdio.h>
namespace Jack
{
JackRingBuffer::JackRingBuffer(int size):fRingBufferSize(size)
{
fRingBuffer = jack_ringbuffer_create(sizeof(jack_default_audio_sample_t) * fRingBufferSize);
Reset(fRingBufferSize);
}
JackRingBuffer::~JackRingBuffer()
{
if (fRingBuffer) {
jack_ringbuffer_free(fRingBuffer);
}
}
void JackRingBuffer::Reset(unsigned int new_size)
{
fRingBufferSize = new_size;
jack_ringbuffer_reset(fRingBuffer);
jack_ringbuffer_reset_size(fRingBuffer, sizeof(jack_default_audio_sample_t) * fRingBufferSize);
jack_ringbuffer_read_advance(fRingBuffer, (sizeof(jack_default_audio_sample_t) * new_size/2));
}
unsigned int JackRingBuffer::ReadSpace()
{
return (jack_ringbuffer_read_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
}
unsigned int JackRingBuffer::WriteSpace()
{
return (jack_ringbuffer_write_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
}
unsigned int JackRingBuffer::Read(jack_default_audio_sample_t* buffer, unsigned int frames)
{
size_t len = jack_ringbuffer_read_space(fRingBuffer);
jack_log("JackRingBuffer::Read input available = %ld", len / sizeof(jack_default_audio_sample_t));
if (len < frames * sizeof(jack_default_audio_sample_t)) {
jack_error("JackRingBuffer::Read : producer too slow, missing frames = %d", frames);
return 0;
} else {
jack_ringbuffer_read(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
return frames;
}
}
unsigned int JackRingBuffer::Write(jack_default_audio_sample_t* buffer, unsigned int frames)
{
size_t len = jack_ringbuffer_write_space(fRingBuffer);
jack_log("JackRingBuffer::Write output available = %ld", len / sizeof(jack_default_audio_sample_t));
if (len < frames * sizeof(jack_default_audio_sample_t)) {
jack_error("JackRingBuffer::Write : consumer too slow, skip frames = %d", frames);
return 0;
} else {
jack_ringbuffer_write(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
return frames;
}
}
unsigned int JackRingBuffer::Read(void* buffer, unsigned int bytes)
{
size_t len = jack_ringbuffer_read_space(fRingBuffer);
jack_log("JackRingBuffer::Read input available = %ld", len);
if (len < bytes) {
jack_error("JackRingBuffer::Read : producer too slow, missing bytes = %d", bytes);
return 0;
} else {
jack_ringbuffer_read(fRingBuffer, (char*)buffer, bytes);
return bytes;
}
}
unsigned int JackRingBuffer::Write(void* buffer, unsigned int bytes)
{
size_t len = jack_ringbuffer_write_space(fRingBuffer);
jack_log("JackRingBuffer::Write output available = %ld", len);
if (len < bytes) {
jack_error("JackRingBuffer::Write : consumer too slow, skip bytes = %d", bytes);
return 0;
} else {
jack_ringbuffer_write(fRingBuffer, (char*)buffer, bytes);
return bytes;
}
}
unsigned int JackResampler::ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames)
{
return Read(buffer, frames);
}
unsigned int JackResampler::WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames)
{
return Write(buffer, frames);
}
}
jack_ringbuffer_read_space
size_t jack_ringbuffer_read_space(const jack_ringbuffer_t *rb)
Jack
Definition: JackAC3Encoder.cpp:30
jack_ringbuffer_create
jack_ringbuffer_t * jack_ringbuffer_create(size_t sz)
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
jack_ringbuffer_write_space
size_t jack_ringbuffer_write_space(const jack_ringbuffer_t *rb)
jack_ringbuffer_free
void jack_ringbuffer_free(jack_ringbuffer_t *rb)
jack_ringbuffer_reset
void jack_ringbuffer_reset(jack_ringbuffer_t *rb)
jack_ringbuffer_write
size_t jack_ringbuffer_write(jack_ringbuffer_t *rb, const char *src, size_t cnt)
jack_ringbuffer_read_advance
void jack_ringbuffer_read_advance(jack_ringbuffer_t *rb, size_t cnt)
jack_ringbuffer_read
size_t jack_ringbuffer_read(jack_ringbuffer_t *rb, char *dest, size_t cnt)
jack_ringbuffer_reset_size
void jack_ringbuffer_reset_size(jack_ringbuffer_t *rb, size_t sz)
jack_log
SERVER_EXPORT void jack_log(const char *fmt,...)
Definition: JackError.cpp:108