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00020 #include "JackLibSampleRateResampler.h"
00021
00022 namespace Jack
00023 {
00024
00025 JackLibSampleRateResampler::JackLibSampleRateResampler()
00026 :JackResampler(),fRatio(1)
00027 {
00028 int error;
00029 fResampler = src_new(SRC_LINEAR, 1, &error);
00030 if (error != 0)
00031 jack_error("JackLibSampleRateResampler::JackLibSampleRateResampler err = %s", src_strerror(error));
00032 }
00033
00034 JackLibSampleRateResampler::JackLibSampleRateResampler(unsigned int quality)
00035 :JackResampler(),fRatio(1)
00036 {
00037 switch (quality) {
00038 case 0:
00039 quality = SRC_LINEAR;
00040 break;
00041 case 1:
00042 quality = SRC_ZERO_ORDER_HOLD;
00043 break;
00044 case 2:
00045 quality = SRC_SINC_FASTEST;
00046 break;
00047 case 3:
00048 quality = SRC_SINC_MEDIUM_QUALITY;
00049 break;
00050 case 4:
00051 quality = SRC_SINC_BEST_QUALITY;
00052 break;
00053 default:
00054 quality = SRC_LINEAR;
00055 jack_error("Out of range resample quality");
00056 break;
00057 }
00058
00059 int error;
00060 fResampler = src_new(quality, 1, &error);
00061 if (error != 0)
00062 jack_error("JackLibSampleRateResampler::JackLibSampleRateResampler err = %s", src_strerror(error));
00063 }
00064
00065 JackLibSampleRateResampler::~JackLibSampleRateResampler()
00066 {
00067 src_delete(fResampler);
00068 }
00069
00070 void JackLibSampleRateResampler::Reset()
00071 {
00072 JackResampler::Reset();
00073 src_reset(fResampler);
00074 }
00075
00076 unsigned int JackLibSampleRateResampler::ReadResample(float* buffer, unsigned int frames)
00077 {
00078 jack_ringbuffer_data_t ring_buffer_data[2];
00079 SRC_DATA src_data;
00080 unsigned int frames_to_write = frames;
00081 unsigned int written_frames = 0;
00082 int res;
00083
00084 jack_ringbuffer_get_read_vector(fRingBuffer, ring_buffer_data);
00085 unsigned int available_frames = (ring_buffer_data[0].len + ring_buffer_data[1].len) / sizeof(float);
00086 jack_log("Output available = %ld", available_frames);
00087
00088 for (int j = 0; j < 2; j++) {
00089
00090 if (ring_buffer_data[j].len > 0) {
00091
00092 src_data.data_in = (float*)ring_buffer_data[j].buf;
00093 src_data.data_out = &buffer[written_frames];
00094 src_data.input_frames = ring_buffer_data[j].len / sizeof(float);
00095 src_data.output_frames = frames_to_write;
00096 src_data.end_of_input = 0;
00097 src_data.src_ratio = fRatio;
00098
00099 res = src_process(fResampler, &src_data);
00100 if (res != 0) {
00101 jack_error("JackLibSampleRateResampler::ReadResample ratio = %f err = %s", fRatio, src_strerror(res));
00102 return 0;
00103 }
00104
00105 frames_to_write -= src_data.output_frames_gen;
00106 written_frames += src_data.output_frames_gen;
00107
00108 if ((src_data.input_frames_used == 0 || src_data.output_frames_gen == 0) && j == 0) {
00109 jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
00110 , j, src_data.input_frames_used, src_data.output_frames_gen, ring_buffer_data[0].len, ring_buffer_data[1].len);
00111 }
00112
00113 jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld", j, src_data.input_frames_used, src_data.output_frames_gen);
00114 jack_ringbuffer_read_advance(fRingBuffer, src_data.input_frames_used * sizeof(float));
00115 }
00116 }
00117
00118 if (written_frames < frames) {
00119 jack_error("Output available = %ld", available_frames);
00120 jack_error("JackLibSampleRateResampler::ReadResample error written_frames = %ld", written_frames);
00121 }
00122
00123 return written_frames;
00124 }
00125
00126 unsigned int JackLibSampleRateResampler::WriteResample(float* buffer, unsigned int frames)
00127 {
00128 jack_ringbuffer_data_t ring_buffer_data[2];
00129 SRC_DATA src_data;
00130 unsigned int frames_to_read = frames;
00131 unsigned int read_frames = 0;
00132 int res;
00133
00134 jack_ringbuffer_get_write_vector(fRingBuffer, ring_buffer_data);
00135 unsigned int available_frames = (ring_buffer_data[0].len + ring_buffer_data[1].len) / sizeof(float);
00136 jack_log("Input available = %ld", available_frames);
00137
00138 for (int j = 0; j < 2; j++) {
00139
00140 if (ring_buffer_data[j].len > 0) {
00141
00142 src_data.data_in = &buffer[read_frames];
00143 src_data.data_out = (float*)ring_buffer_data[j].buf;
00144 src_data.input_frames = frames_to_read;
00145 src_data.output_frames = (ring_buffer_data[j].len / sizeof(float));
00146 src_data.end_of_input = 0;
00147 src_data.src_ratio = fRatio;
00148
00149 res = src_process(fResampler, &src_data);
00150 if (res != 0) {
00151 jack_error("JackLibSampleRateResampler::ReadResample ratio = %f err = %s", fRatio, src_strerror(res));
00152 return 0;
00153 }
00154
00155 frames_to_read -= src_data.input_frames_used;
00156 read_frames += src_data.input_frames_used;
00157
00158 if ((src_data.input_frames_used == 0 || src_data.output_frames_gen == 0) && j == 0) {
00159 jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
00160 , j, src_data.input_frames_used, src_data.output_frames_gen, ring_buffer_data[0].len, ring_buffer_data[1].len);
00161 }
00162
00163 jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld", j, src_data.input_frames_used, src_data.output_frames_gen);
00164 jack_ringbuffer_write_advance(fRingBuffer, src_data.output_frames_gen * sizeof(float));
00165 }
00166 }
00167
00168 if (read_frames < frames) {
00169 jack_error("Input available = %ld", available_frames);
00170 jack_error("JackLibSampleRateResampler::ReadResample error read_frames = %ld", read_frames);
00171 }
00172
00173 return read_frames;
00174 }
00175
00176 }