1 /*
2 Mono to stereo converter DSP plugin for DeaDBeeF Player
3 Copyright (C) 2009-2014 Alexey Yakovenko
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17
18 2. Altered source versions must be plainly marked as such, and must not be
19 misrepresented as being the original software.
20
21 3. This notice may not be removed or altered from any source distribution.
22 */
23
24 #include <stdlib.h>
25 #include <string.h>
26 #include <assert.h>
27 #include "../../deadbeef.h"
28
29 enum {
30 M2S_PARAM_LEFTMIX,
31 M2S_PARAM_RIGHTMIX,
32 M2S_PARAM_COUNT
33 };
34
35 static DB_functions_t *deadbeef;
36 static DB_dsp_t plugin;
37
38 typedef struct {
39 ddb_dsp_context_t ctx;
40 float leftmix;
41 float rightmix;
42 } ddb_m2s_t;
43
44 ddb_dsp_context_t*
m2s_open(void)45 m2s_open (void) {
46 ddb_m2s_t *m2s = malloc (sizeof (ddb_m2s_t));
47 DDB_INIT_DSP_CONTEXT (m2s,ddb_m2s_t,&plugin);
48
49 // initialize
50 m2s->leftmix = 1;
51 m2s->rightmix = 1;
52
53 return (ddb_dsp_context_t *)m2s;
54 }
55
56 void
m2s_close(ddb_dsp_context_t * ctx)57 m2s_close (ddb_dsp_context_t *ctx) {
58 ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
59
60 // free instance-specific allocations
61
62 free (m2s);
63 }
64
65 void
m2s_reset(ddb_dsp_context_t * ctx)66 m2s_reset (ddb_dsp_context_t *ctx) {
67 // use this method to flush dsp buffers, reset filters, etc
68 }
69
70 int
m2s_process(ddb_dsp_context_t * ctx,float * samples,int nframes,int maxframes,ddb_waveformat_t * fmt,float * r)71 m2s_process (ddb_dsp_context_t *ctx, float *samples, int nframes, int maxframes, ddb_waveformat_t *fmt, float *r) {
72 if (fmt->channels >= 2) {
73 return nframes;
74 }
75 ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
76
77 for (int i = nframes-1; i >= 0; i--) {
78 samples[i*2+1] = samples[i] * m2s->rightmix;
79 samples[i*2+0] = samples[i] * m2s->leftmix;
80 }
81 fmt->channels = 2;
82 fmt->channelmask = 3;
83 return nframes;
84 }
85
86 const char *
m2s_get_param_name(int p)87 m2s_get_param_name (int p) {
88 switch (p) {
89 case M2S_PARAM_LEFTMIX:
90 return "Left mix";
91 case M2S_PARAM_RIGHTMIX:
92 return "Right mix";
93 default:
94 fprintf (stderr, "m2s_param_name: invalid param index (%d)\n", p);
95 }
96 return NULL;
97 }
98
99 int
m2s_num_params(void)100 m2s_num_params (void) {
101 return M2S_PARAM_COUNT;
102 }
103
104 void
m2s_set_param(ddb_dsp_context_t * ctx,int p,const char * val)105 m2s_set_param (ddb_dsp_context_t *ctx, int p, const char *val) {
106 ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
107 switch (p) {
108 case M2S_PARAM_LEFTMIX:
109 m2s->leftmix = atof (val);
110 break;
111 case M2S_PARAM_RIGHTMIX:
112 m2s->rightmix = atof (val);
113 break;
114 default:
115 fprintf (stderr, "m2s_set_param: invalid param index (%d)\n", p);
116 }
117 }
118
119 void
m2s_get_param(ddb_dsp_context_t * ctx,int p,char * val,int sz)120 m2s_get_param (ddb_dsp_context_t *ctx, int p, char *val, int sz) {
121 ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
122 switch (p) {
123 case M2S_PARAM_LEFTMIX:
124 snprintf (val, sz, "%f", m2s->leftmix);
125 break;
126 case M2S_PARAM_RIGHTMIX:
127 snprintf (val, sz, "%f", m2s->rightmix);
128 break;
129 default:
130 fprintf (stderr, "m2s_get_param: invalid param index (%d)\n", p);
131 }
132 }
133
134 static const char settings_dlg[] =
135 "property \"Left mix:\" hscale[0,1,0.001] 0 1;\n"
136 "property \"Right mix:\" hscale[0,1,0.001] 1 1;\n"
137 ;
138
139 static DB_dsp_t plugin = {
140 .plugin.api_vmajor = 1,
141 .plugin.api_vminor = 0,
142 .open = m2s_open,
143 .close = m2s_close,
144 .process = m2s_process,
145 .plugin.version_major = 1,
146 .plugin.version_minor = 0,
147 .plugin.type = DB_PLUGIN_DSP,
148 .plugin.id = "m2s",
149 .plugin.name = "Mono to stereo",
150 .plugin.descr = "Mono to stereo converter DSP",
151 .plugin.copyright =
152 "Mono to stereo converter DSP plugin for DeaDBeeF Player\n"
153 "Copyright (C) 2009-2014 Alexey Yakovenko\n"
154 "\n"
155 "This software is provided 'as-is', without any express or implied\n"
156 "warranty. In no event will the authors be held liable for any damages\n"
157 "arising from the use of this software.\n"
158 "\n"
159 "Permission is granted to anyone to use this software for any purpose,\n"
160 "including commercial applications, and to alter it and redistribute it\n"
161 "freely, subject to the following restrictions:\n"
162 "\n"
163 "1. The origin of this software must not be misrepresented; you must not\n"
164 " claim that you wrote the original software. If you use this software\n"
165 " in a product, an acknowledgment in the product documentation would be\n"
166 " appreciated but is not required.\n"
167 "\n"
168 "2. Altered source versions must be plainly marked as such, and must not be\n"
169 " misrepresented as being the original software.\n"
170 "\n"
171 "3. This notice may not be removed or altered from any source distribution.\n"
172 ,
173 .plugin.website = "http://deadbeef.sf.net",
174 .num_params = m2s_num_params,
175 .get_param_name = m2s_get_param_name,
176 .set_param = m2s_set_param,
177 .get_param = m2s_get_param,
178 .reset = m2s_reset,
179 .configdialog = settings_dlg,
180 };
181
182 DB_plugin_t *
ddb_mono2stereo_load(DB_functions_t * f)183 ddb_mono2stereo_load (DB_functions_t *f) {
184 deadbeef = f;
185 return &plugin.plugin;
186 }
187
188