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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
00040 void JackResampler::Reset(unsigned int new_size)
00041 {
00042 fRingBufferSize = new_size;
00043 jack_ringbuffer_reset(fRingBuffer);
00044 jack_ringbuffer_reset_size(fRingBuffer, sizeof(jack_default_audio_sample_t) * fRingBufferSize);
00045 jack_ringbuffer_read_advance(fRingBuffer, (sizeof(jack_default_audio_sample_t) * fRingBufferSize / 2));
00046 }
00047
00048 unsigned int JackResampler::ReadSpace()
00049 {
00050 return (jack_ringbuffer_read_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
00051 }
00052
00053 unsigned int JackResampler::WriteSpace()
00054 {
00055 return (jack_ringbuffer_write_space(fRingBuffer) / sizeof(jack_default_audio_sample_t));
00056 }
00057
00058 unsigned int JackResampler::Read(jack_default_audio_sample_t* buffer, unsigned int frames)
00059 {
00060 size_t len = jack_ringbuffer_read_space(fRingBuffer);
00061 jack_log("JackResampler::Read input available = %ld", len / sizeof(jack_default_audio_sample_t));
00062
00063 if (len < frames * sizeof(jack_default_audio_sample_t)) {
00064 jack_error("JackResampler::Read : producer too slow, missing frames = %d", frames);
00065 return 0;
00066 } else {
00067 jack_ringbuffer_read(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
00068 return frames;
00069 }
00070 }
00071
00072 unsigned int JackResampler::Write(jack_default_audio_sample_t* buffer, unsigned int frames)
00073 {
00074 size_t len = jack_ringbuffer_write_space(fRingBuffer);
00075 jack_log("JackResampler::Write output available = %ld", len / sizeof(jack_default_audio_sample_t));
00076
00077 if (len < frames * sizeof(jack_default_audio_sample_t)) {
00078 jack_error("JackResampler::Write : consumer too slow, skip frames = %d", frames);
00079 return 0;
00080 } else {
00081 jack_ringbuffer_write(fRingBuffer, (char*)buffer, frames * sizeof(jack_default_audio_sample_t));
00082 return frames;
00083 }
00084 }
00085
00086 unsigned int JackResampler::Read(void* buffer, unsigned int bytes)
00087 {
00088 size_t len = jack_ringbuffer_read_space(fRingBuffer);
00089 jack_log("JackResampler::Read input available = %ld", len);
00090
00091 if (len < bytes) {
00092 jack_error("JackResampler::Read : producer too slow, missing bytes = %d", bytes);
00093 return 0;
00094 } else {
00095 jack_ringbuffer_read(fRingBuffer, (char*)buffer, bytes);
00096 return bytes;
00097 }
00098 }
00099
00100 unsigned int JackResampler::Write(void* buffer, unsigned int bytes)
00101 {
00102 size_t len = jack_ringbuffer_write_space(fRingBuffer);
00103 jack_log("JackResampler::Write output available = %ld", len);
00104
00105 if (len < bytes) {
00106 jack_error("JackResampler::Write : consumer too slow, skip bytes = %d", bytes);
00107 return 0;
00108 } else {
00109 jack_ringbuffer_write(fRingBuffer, (char*)buffer, bytes);
00110 return bytes;
00111 }
00112 }
00113
00114 unsigned int JackResampler::ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames)
00115 {
00116 return Read(buffer, frames);
00117 }
00118
00119 unsigned int JackResampler::WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames)
00120 {
00121 return Write(buffer, frames);
00122 }
00123
00124 }