2 Copyright (C) 2008 Grame
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "JackLibSampleRateResampler.h"
21 #include "JackError.h"
26 JackLibSampleRateResampler::JackLibSampleRateResampler()
30 fResampler
= src_new(SRC_LINEAR
, 1, &error
);
32 jack_error("JackLibSampleRateResampler::JackLibSampleRateResampler err = %s", src_strerror(error
));
35 JackLibSampleRateResampler::JackLibSampleRateResampler(unsigned int quality
)
43 quality
= SRC_ZERO_ORDER_HOLD
;
46 quality
= SRC_SINC_FASTEST
;
49 quality
= SRC_SINC_MEDIUM_QUALITY
;
52 quality
= SRC_SINC_BEST_QUALITY
;
56 jack_error("Out of range resample quality");
61 fResampler
= src_new(quality
, 1, &error
);
63 jack_error("JackLibSampleRateResampler::JackLibSampleRateResampler err = %s", src_strerror(error
));
67 JackLibSampleRateResampler::~JackLibSampleRateResampler()
69 src_delete(fResampler
);
72 void JackLibSampleRateResampler::Reset(unsigned int new_size
)
74 JackResampler::Reset(new_size
);
75 src_reset(fResampler
);
78 unsigned int JackLibSampleRateResampler::ReadResample(jack_default_audio_sample_t
* buffer
, unsigned int frames
)
80 jack_ringbuffer_data_t ring_buffer_data
[2];
82 unsigned int frames_to_write
= frames
;
83 unsigned int written_frames
= 0;
86 jack_ringbuffer_get_read_vector(fRingBuffer
, ring_buffer_data
);
87 unsigned int available_frames
= (ring_buffer_data
[0].len
+ ring_buffer_data
[1].len
) / sizeof(jack_default_audio_sample_t
);
88 jack_log("Output available = %ld", available_frames
);
90 for (int j
= 0; j
< 2; j
++) {
92 if (ring_buffer_data
[j
].len
> 0) {
94 src_data
.data_in
= (jack_default_audio_sample_t
*)ring_buffer_data
[j
].buf
;
95 src_data
.data_out
= &buffer
[written_frames
];
96 src_data
.input_frames
= ring_buffer_data
[j
].len
/ sizeof(jack_default_audio_sample_t
);
97 src_data
.output_frames
= frames_to_write
;
98 src_data
.end_of_input
= 0;
99 src_data
.src_ratio
= fRatio
;
101 res
= src_process(fResampler
, &src_data
);
103 jack_error("JackLibSampleRateResampler::ReadResample ratio = %f err = %s", fRatio
, src_strerror(res
));
107 frames_to_write
-= src_data
.output_frames_gen
;
108 written_frames
+= src_data
.output_frames_gen
;
110 if ((src_data
.input_frames_used
== 0 || src_data
.output_frames_gen
== 0) && j
== 0) {
111 jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
112 , j
, src_data
.input_frames_used
, src_data
.output_frames_gen
, ring_buffer_data
[0].len
, ring_buffer_data
[1].len
);
115 jack_log("Output : j = %d input_frames_used = %ld output_frames_gen = %ld", j
, src_data
.input_frames_used
, src_data
.output_frames_gen
);
116 jack_ringbuffer_read_advance(fRingBuffer
, src_data
.input_frames_used
* sizeof(jack_default_audio_sample_t
));
120 if (written_frames
< frames
) {
121 jack_error("Output available = %ld", available_frames
);
122 jack_error("JackLibSampleRateResampler::ReadResample error written_frames = %ld", written_frames
);
125 return written_frames
;
128 unsigned int JackLibSampleRateResampler::WriteResample(jack_default_audio_sample_t
* buffer
, unsigned int frames
)
130 jack_ringbuffer_data_t ring_buffer_data
[2];
132 unsigned int frames_to_read
= frames
;
133 unsigned int read_frames
= 0;
136 jack_ringbuffer_get_write_vector(fRingBuffer
, ring_buffer_data
);
137 unsigned int available_frames
= (ring_buffer_data
[0].len
+ ring_buffer_data
[1].len
) / sizeof(jack_default_audio_sample_t
);
138 jack_log("Input available = %ld", available_frames
);
140 for (int j
= 0; j
< 2; j
++) {
142 if (ring_buffer_data
[j
].len
> 0) {
144 src_data
.data_in
= &buffer
[read_frames
];
145 src_data
.data_out
= (jack_default_audio_sample_t
*)ring_buffer_data
[j
].buf
;
146 src_data
.input_frames
= frames_to_read
;
147 src_data
.output_frames
= (ring_buffer_data
[j
].len
/ sizeof(jack_default_audio_sample_t
));
148 src_data
.end_of_input
= 0;
149 src_data
.src_ratio
= fRatio
;
151 res
= src_process(fResampler
, &src_data
);
153 jack_error("JackLibSampleRateResampler::WriteResample ratio = %f err = %s", fRatio
, src_strerror(res
));
157 frames_to_read
-= src_data
.input_frames_used
;
158 read_frames
+= src_data
.input_frames_used
;
160 if ((src_data
.input_frames_used
== 0 || src_data
.output_frames_gen
== 0) && j
== 0) {
161 jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld frames1 = %lu frames2 = %lu"
162 , j
, src_data
.input_frames_used
, src_data
.output_frames_gen
, ring_buffer_data
[0].len
, ring_buffer_data
[1].len
);
165 jack_log("Input : j = %d input_frames_used = %ld output_frames_gen = %ld", j
, src_data
.input_frames_used
, src_data
.output_frames_gen
);
166 jack_ringbuffer_write_advance(fRingBuffer
, src_data
.output_frames_gen
* sizeof(jack_default_audio_sample_t
));
170 if (read_frames
< frames
) {
171 jack_error("Input available = %ld", available_frames
);
172 jack_error("JackLibSampleRateResampler::WriteResample error read_frames = %ld", read_frames
);