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00020 #include "JackResampler.h"
00021 #include <stdio.h>
00022
00023 namespace Jack
00024 {
00025
00026 JackResampler::JackResampler()
00027 :fRatio(1),fRingBufferSize(DEFAULT_RB_SIZE)
00028 {
00029 fRingBuffer = jack_ringbuffer_create(sizeof(jack_default_audio_sample_t) * fRingBufferSize);
00030 jack_ringbuffer_read_advance(fRingBuffer, (sizeof(jack_default_audio_sample_t) * fRingBufferSize) / 2);
00031 }
00032
00033 JackResampler::~JackResampler()
00034 {
00035 if (fRingBuffer)
00036 jack_ringbuffer_free(fRingBuffer);
00037 }
00038
00039 void JackResampler::Reset(unsigned int new_size)
00040 {
00041 fRingBufferSize = new_size;
00042 jack_ringbuffer_reset_size(fRingBuffer, sizeof(jack_default_audio_sample_t) * fRingBufferSize);
00043 jack_ringbuffer_read_advance(fRingBuffer, (sizeof(jack_default_audio_sample_t) * fRingBufferSize / 2));
00044 }
00045
00046 unsigned int JackResampler::ReadSpace()
00047 {
00048 return (jack_ringbuffer_read_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
00049 }
00050
00051 unsigned int JackResampler::WriteSpace()
00052 {
00053 return (jack_ringbuffer_write_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
00054 }
00055
00056 unsigned int JackResampler::Read(jack_default_audio_sample_t* buffer, unsigned int frames)
00057 {
00058 size_t len = jack_ringbuffer_read_space(fRingBuffer);
00059 jack_log("JackResampler::Read input available = %ld", len / sizeof(jack_default_audio_sample_t));
00060
00061 if (len < frames * sizeof(jack_default_audio_sample_t)) {
00062 jack_error("JackResampler::Read : producer too slow, missing frames = %d", frames);
00063 return 0;
00064 } else {
00065 jack_ringbuffer_read(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
00066 return frames;
00067 }
00068 }
00069
00070 unsigned int JackResampler::Write(jack_default_audio_sample_t* buffer, unsigned int frames)
00071 {
00072 size_t len = jack_ringbuffer_write_space(fRingBuffer);
00073 jack_log("JackResampler::Write output available = %ld", len / sizeof(jack_default_audio_sample_t));
00074
00075 if (len < frames * sizeof(jack_default_audio_sample_t)) {
00076 jack_error("JackResampler::Write : consumer too slow, skip frames = %d", frames);
00077 return 0;
00078 } else {
00079 jack_ringbuffer_write(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
00080 return frames;
00081 }
00082 }
00083
00084 unsigned int JackResampler::ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames)
00085 {
00086 return Read(buffer, frames);
00087 }
00088
00089 unsigned int JackResampler::WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames)
00090 {
00091 return Write(buffer, frames);
00092 }
00093
00094 }