1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009-2010 Alexey Yakovenko <waker@users.sourceforge.net>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <samplerate.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "conf.h"
#include "threading.h"
#include "src.h"
//#define trace(...) { fprintf(stderr, __VA_ARGS__); }
#define trace(fmt,...)
#define SRC_BUFFER 16000
#define SRC_MAX_CHANNELS 8
typedef struct {
ddb_src_t ddb_src;
int quality;
SRC_STATE *src;
SRC_DATA srcdata;
int remaining; // number of input samples in SRC buffer
__attribute__((__aligned__(16))) char in_fbuffer[sizeof(float)*SRC_BUFFER*SRC_MAX_CHANNELS];
// __attribute__((__aligned__(16))) float out_fbuffer[SRC_BUFFER*SRC_MAX_CHANNELS];
uintptr_t mutex;
} ddb_src_libsamplerate_t;
ddb_src_t *
ddb_src_init (void) {
ddb_src_libsamplerate_t *src = malloc (sizeof (ddb_src_libsamplerate_t));
memset (src, 0, sizeof (ddb_src_libsamplerate_t));
src->mutex = mutex_create ();
src->quality = conf_get_int ("src->quality", 2);
src->src = src_new (src->quality, 2, NULL);
if (!src->src) {
ddb_src_free ((ddb_src_t *)src);
return NULL;
}
return (ddb_src_t *)src;
}
void
ddb_src_free (ddb_src_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
if (src->mutex) {
mutex_free (src->mutex);
src->mutex = 0;
}
if (src->src) {
src_delete (src->src);
src->src = NULL;
}
free (src);
}
void
ddb_src_lock (ddb_src_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
mutex_lock (src->mutex);
}
void
ddb_src_unlock (ddb_src_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
mutex_unlock (src->mutex);
}
void
ddb_src_reset (ddb_src_t *_src, int full) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
src->remaining = 0;
if (full) {
src_reset (src->src);
}
}
void
ddb_src_confchanged (ddb_src_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
int q = conf_get_int ("src->quality", 2);
if (q != src->quality && q >= SRC_SINC_BEST_QUALITY && q <= SRC_LINEAR) {
ddb_src_lock (_src);
trace ("changing src->quality from %d to %d\n", src->quality, q);
src->quality = q;
if (src) {
src_delete (src->src);
src->src = NULL;
}
memset (&src->srcdata, 0, sizeof (src->srcdata));
src->src = src_new (src->quality, 2, NULL);
ddb_src_unlock (_src);
}
}
int
ddb_src_process (ddb_src_t *_src, const char * restrict input, int nframes, char * restrict output, int buffersize, float ratio, int nchannels) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
extern FILE *out;
int initsize = buffersize;
int samplesize = nchannels * sizeof (float);
do {
// add more frames to input SRC buffer
int n = nframes;
if (n >= SRC_BUFFER - src->remaining) {
n = SRC_BUFFER - src->remaining;
}
if (n > 0) {
memcpy (&src->in_fbuffer[src->remaining*samplesize], input, n * samplesize);
src->remaining += n;
input += n * nchannels;
nframes -= n;
}
if (!src->remaining) {
//trace ("WARNING: SRC input buffer starved\n");
break;
}
// call libsamplerate
src->srcdata.data_in = (float *)src->in_fbuffer;
src->srcdata.data_out = (float *)output;
src->srcdata.input_frames = src->remaining;
src->srcdata.output_frames = buffersize/samplesize;
src->srcdata.src_ratio = ratio;
src->srcdata.end_of_input = 0;
ddb_src_lock (_src);
src_set_ratio (src->src, ratio);
trace ("src input: %d, ratio %f, buffersize: %d\n", src->srcdata.input_frames, ratio, buffersize);
int src_err = src_process (src->src, &src->srcdata);
trace ("src output: %d, used: %d\n", src->srcdata.output_frames_gen, src->srcdata.input_frames_used);
ddb_src_unlock (_src);
if (src_err) {
const char *err = src_strerror (src_err) ;
fprintf (stderr, "src_process error %s\n"
"srcdata.data_in=%p, srcdata.data_out=%p, srcdata.input_frames=%d, srcdata.output_frames=%d, srcdata.src_ratio=%f", err, src->srcdata.data_in, src->srcdata.data_out, (int)src->srcdata.input_frames, (int)src->srcdata.output_frames, ratio);
exit (-1);
}
buffersize -= src->srcdata.output_frames_gen * samplesize;
output += src->srcdata.output_frames_gen * samplesize;
// calculate how many unused input samples left
src->remaining -= src->srcdata.input_frames_used;
// copy spare samples for next update
if (src->remaining > 0 && src->srcdata.input_frames_used > 0) {
memmove (src->in_fbuffer, &src->in_fbuffer[src->srcdata.input_frames_used*samplesize], src->remaining * samplesize);
}
if (src->srcdata.output_frames_gen == 0) {
break;
}
} while (nframes > 0);
trace ("src processed: %d bytes\n", initsize-buffersize);
return initsize - buffersize;
}
|
