2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk.com>
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2.1 of the License,
10 or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #include <pulse/sample.h>
30 #include <pulse/volume.h>
31 #include <pulsecore/log.h>
32 #include <pulsecore/macro.h>
36 static void remap_mono_to_stereo_s16ne_c(pa_remap_t
*m
, int16_t *dst
, const int16_t *src
, unsigned n
) {
39 for (i
= n
>> 2; i
; i
--) {
40 dst
[0] = dst
[1] = src
[0];
41 dst
[2] = dst
[3] = src
[1];
42 dst
[4] = dst
[5] = src
[2];
43 dst
[6] = dst
[7] = src
[3];
47 for (i
= n
& 3; i
; i
--) {
48 dst
[0] = dst
[1] = src
[0];
54 static void remap_mono_to_stereo_float32ne_c(pa_remap_t
*m
, float *dst
, const float *src
, unsigned n
) {
57 for (i
= n
>> 2; i
; i
--) {
58 dst
[0] = dst
[1] = src
[0];
59 dst
[2] = dst
[3] = src
[1];
60 dst
[4] = dst
[5] = src
[2];
61 dst
[6] = dst
[7] = src
[3];
65 for (i
= n
& 3; i
; i
--) {
66 dst
[0] = dst
[1] = src
[0];
72 static void remap_channels_matrix_s16ne_c(pa_remap_t
*m
, void *dst
, const void *src
, unsigned n
) {
76 n_ic
= m
->i_ss
.channels
;
77 n_oc
= m
->o_ss
.channels
;
79 memset(dst
, 0, n
* sizeof(int16_t) * n_oc
);
81 for (oc
= 0; oc
< n_oc
; oc
++) {
83 for (ic
= 0; ic
< n_ic
; ic
++) {
87 vol
= m
->map_table_i
[oc
][ic
];
92 d
= (int16_t *)dst
+ oc
;
93 s
= (int16_t *)src
+ ic
;
96 for (i
= n
; i
> 0; i
--, s
+= n_ic
, d
+= n_oc
)
99 for (i
= n
; i
> 0; i
--, s
+= n_ic
, d
+= n_oc
)
100 *d
+= (int16_t) (((int32_t)*s
* vol
) >> 16);
106 static void remap_channels_matrix_float32ne_c(pa_remap_t
*m
, void *dst
, const void *src
, unsigned n
) {
110 n_ic
= m
->i_ss
.channels
;
111 n_oc
= m
->o_ss
.channels
;
113 memset(dst
, 0, n
* sizeof(float) * n_oc
);
115 for (oc
= 0; oc
< n_oc
; oc
++) {
117 for (ic
= 0; ic
< n_ic
; ic
++) {
121 vol
= m
->map_table_f
[oc
][ic
];
126 d
= (float *)dst
+ oc
;
127 s
= (float *)src
+ ic
;
130 for (i
= n
; i
> 0; i
--, s
+= n_ic
, d
+= n_oc
)
133 for (i
= n
; i
> 0; i
--, s
+= n_ic
, d
+= n_oc
)
140 bool pa_setup_remap_arrange(const pa_remap_t
*m
, int8_t arrange
[PA_CHANNELS_MAX
]) {
146 n_ic
= m
->i_ss
.channels
;
147 n_oc
= m
->o_ss
.channels
;
149 for (oc
= 0; oc
< n_oc
; oc
++) {
151 for (ic
= 0; ic
< n_ic
; ic
++) {
152 int32_t vol
= m
->map_table_i
[oc
][ic
];
154 /* input channel is not used */
158 /* if mixing this channel, we cannot just rearrange */
159 if (vol
!= 0x10000 || arrange
[oc
] >= 0)
169 void pa_set_remap_func(pa_remap_t
*m
, pa_do_remap_func_t func_s16
,
170 pa_do_remap_func_t func_float
) {
174 if (m
->format
== PA_SAMPLE_S16NE
)
175 m
->do_remap
= func_s16
;
176 else if (m
->format
== PA_SAMPLE_FLOAT32NE
)
177 m
->do_remap
= func_float
;
179 pa_assert_not_reached();
182 /* set the function that will execute the remapping based on the matrices */
183 static void init_remap_c(pa_remap_t
*m
) {
186 n_oc
= m
->o_ss
.channels
;
187 n_ic
= m
->i_ss
.channels
;
189 /* find some common channel remappings, fall back to full matrix operation. */
190 if (n_ic
== 1 && n_oc
== 2 &&
191 m
->map_table_i
[0][0] == 0x10000 && m
->map_table_i
[1][0] == 0x10000) {
193 pa_log_info("Using mono to stereo remapping");
194 pa_set_remap_func(m
, (pa_do_remap_func_t
) remap_mono_to_stereo_s16ne_c
,
195 (pa_do_remap_func_t
) remap_mono_to_stereo_float32ne_c
);
197 pa_log_info("Using generic matrix remapping");
199 pa_set_remap_func(m
, remap_channels_matrix_s16ne_c
, remap_channels_matrix_float32ne_c
);
203 /* default C implementation */
204 static pa_init_remap_func_t init_remap_func
= init_remap_c
;
206 void pa_init_remap_func(pa_remap_t
*m
) {
207 pa_assert(init_remap_func
);
211 /* call the installed remap init function */
214 if (m
->do_remap
== NULL
) {
215 /* nothing was installed, fallback to C version */
220 pa_init_remap_func_t
pa_get_init_remap_func(void) {
221 return init_remap_func
;
224 void pa_set_init_remap_func(pa_init_remap_func_t func
) {
225 init_remap_func
= func
;