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00020 #include "JackLibSampleRateResampler.h"
00021
00022 namespace Jack
00023 {
00024
00025 JackLibSampleRateResampler::JackLibSampleRateResampler()
00026 :JackResampler()
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()
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
00066 JackLibSampleRateResampler::~JackLibSampleRateResampler()
00067 {
00068 src_delete(fResampler);
00069 }
00070
00071 void JackLibSampleRateResampler::Reset(unsigned int new_size)
00072 {
00073 JackResampler::Reset(new_size);
00074 src_reset(fResampler);
00075 }
00076
00077 unsigned int JackLibSampleRateResampler::ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames)
00078 {
00079 jack_ringbuffer_data_t ring_buffer_data[2];
00080 SRC_DATA src_data;
00081 unsigned int frames_to_write = frames;
00082 unsigned int written_frames = 0;
00083 int res;
00084
00085 jack_ringbuffer_get_read_vector(fRingBuffer, ring_buffer_data);
00086 unsigned int available_frames = (ring_buffer_data[0].len + ring_buffer_data[1].len) / sizeof(jack_default_audio_sample_t);
00087 jack_log("Output available = %ld", available_frames);
00088
00089 for (int j = 0; j < 2; j++) {
00090
00091 if (ring_buffer_data[j].len > 0) {
00092
00093 src_data.data_in = (jack_default_audio_sample_t*)ring_buffer_data[j].buf;
00094 src_data.data_out = &buffer[written_frames];
00095 src_data.input_frames = ring_buffer_data[j].len / sizeof(jack_default_audio_sample_t);
00096 src_data.output_frames = frames_to_write;
00097 src_data.end_of_input = 0;
00098 src_data.src_ratio = fRatio;
00099
00100 res = src_process(fResampler, &src_data);
00101 if (res != 0) {
00102 jack_error("JackLibSampleRateResampler::ReadResample ratio = %f err = %s", fRatio, src_strerror(res));
00103 return 0;
00104 }
00105
00106 frames_to_write -= src_data.output_frames_gen;
00107 written_frames += src_data.output_frames_gen;
00108
00109 if ((src_data.input_frames_used == 0 || src_data.output_frames_gen == 0) && j == 0) {
00110 jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
00111 , j, src_data.input_frames_used, src_data.output_frames_gen, ring_buffer_data[0].len, ring_buffer_data[1].len);
00112 }
00113
00114 jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld", j, src_data.input_frames_used, src_data.output_frames_gen);
00115 jack_ringbuffer_read_advance(fRingBuffer, src_data.input_frames_used * sizeof(jack_default_audio_sample_t));
00116 }
00117 }
00118
00119 if (written_frames < frames) {
00120 jack_error("Output available = %ld", available_frames);
00121 jack_error("JackLibSampleRateResampler::ReadResample error written_frames = %ld", written_frames);
00122 }
00123
00124 return written_frames;
00125 }
00126
00127 unsigned int JackLibSampleRateResampler::WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames)
00128 {
00129 jack_ringbuffer_data_t ring_buffer_data[2];
00130 SRC_DATA src_data;
00131 unsigned int frames_to_read = frames;
00132 unsigned int read_frames = 0;
00133 int res;
00134
00135 jack_ringbuffer_get_write_vector(fRingBuffer, ring_buffer_data);
00136 unsigned int available_frames = (ring_buffer_data[0].len + ring_buffer_data[1].len) / sizeof(jack_default_audio_sample_t);
00137 jack_log("Input available = %ld", available_frames);
00138
00139 for (int j = 0; j < 2; j++) {
00140
00141 if (ring_buffer_data[j].len > 0) {
00142
00143 src_data.data_in = &buffer[read_frames];
00144 src_data.data_out = (jack_default_audio_sample_t*)ring_buffer_data[j].buf;
00145 src_data.input_frames = frames_to_read;
00146 src_data.output_frames = (ring_buffer_data[j].len / sizeof(jack_default_audio_sample_t));
00147 src_data.end_of_input = 0;
00148 src_data.src_ratio = fRatio;
00149
00150 res = src_process(fResampler, &src_data);
00151 if (res != 0) {
00152 jack_error("JackLibSampleRateResampler::WriteResample ratio = %f err = %s", fRatio, src_strerror(res));
00153 return 0;
00154 }
00155
00156 frames_to_read -= src_data.input_frames_used;
00157 read_frames += src_data.input_frames_used;
00158
00159 if ((src_data.input_frames_used == 0 || src_data.output_frames_gen == 0) && j == 0) {
00160 jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
00161 , j, src_data.input_frames_used, src_data.output_frames_gen, ring_buffer_data[0].len, ring_buffer_data[1].len);
00162 }
00163
00164 jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld", j, src_data.input_frames_used, src_data.output_frames_gen);
00165 jack_ringbuffer_write_advance(fRingBuffer, src_data.output_frames_gen * sizeof(jack_default_audio_sample_t));
00166 }
00167 }
00168
00169 if (read_frames < frames) {
00170 jack_error("Input available = %ld", available_frames);
00171 jack_error("JackLibSampleRateResampler::WriteResample error read_frames = %ld", read_frames);
00172 }
00173
00174 return read_frames;
00175 }
00176
00177 }