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