source: roaraudio/roard/codecfilter_mulaw.c @ 5889:d866fb1213d6

Last change on this file since 5889:d866fb1213d6 was 5823:f9f70dbaa376, checked in by phi, 11 years ago

updated copyright

File size: 2.5 KB
Line 
1//codecfilter_mulaw.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2013
5 *
6 *  This file is part of roard a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  RoarAudio is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 */
25
26/* ckport options:
27 * ckport: ignore-symbol: roardsp_conv_pcm162mulaw of target libroardsp0
28 * ckport: ignore-symbol: roardsp_conv_mulaw2pcm16 of target libroardsp0
29 */
30
31#include "roard.h"
32
33#ifdef ROAR_SUPPORT_MULAW
34
35int cf_mulaw_open(CODECFILTER_USERDATA_T * inst, int codec,
36                                            struct roar_stream_server * info,
37                                            struct roar_codecfilter   * filter) {
38 struct roar_stream * s = ROAR_STREAM(info);
39
40 (void)codec, (void)filter;
41
42 *inst = (CODECFILTER_USERDATA_T) info;
43
44 s->info.bits  = 16;
45 s->info.codec = ROAR_CODEC_DEFAULT;
46
47 return 0;
48}
49
50int cf_mulaw_close(CODECFILTER_USERDATA_T   inst) {
51 (void)inst;
52 return 0;
53}
54
55int cf_mulaw_read(CODECFILTER_USERDATA_T   inst, char * buf, int len) {
56 struct roar_stream_server * s = ROAR_STREAM_SERVER(inst);
57
58 if ( (len = stream_vio_s_read(s, buf, len/2)) < 1 ) {
59  return len;
60 }
61
62 roardsp_conv_mulaw2pcm16((int16_t *)buf, buf, len);
63
64 return len*2;
65}
66
67#ifdef ROAR_SUPPORT_MULAW_RW
68int cf_mulaw_write(CODECFILTER_USERDATA_T   inst, char * buf, int len) {
69 struct roar_stream_server * s = ROAR_STREAM_SERVER(inst);
70 char * out;
71
72 // TODO: add a more effect way to use memory than allways alloc/freeing it.
73 //       maybe by keeping a buffer over instanzes or by using ca global buffer
74 //       with an refrenze counter so we can free it on last use
75
76 len /= 2;
77
78 if ( (out = (char*)roar_mm_malloc(len)) == NULL )
79  return -1;
80
81 roardsp_conv_pcm162mulaw(out, (int16_t*)buf, len);
82
83 len = stream_vio_s_write(s, out, len);
84
85 roar_mm_free(out);
86
87 if ( len > 0 ) {
88  return len*2;
89 } else {
90  return -1;
91 }
92}
93#endif
94
95#endif
96
97//ll
Note: See TracBrowser for help on using the repository browser.