source: roaraudio/libroararts/libartsc.c @ 5439:7950543cabbc

Last change on this file since 5439:7950543cabbc was 5381:430b1d26e12d, checked in by phi, 12 years ago

updated copyright years

File size: 8.0 KB
Line 
1//libartsc.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2012
5 *  The code (may) include prototypes and comments (and maybe
6 *  other code fragements) from libarts*. They are mostly copyrighted by:
7 *  Stefan Westerfeld <stefan@space.twc.de>
8 *
9 *  This file is part of libroararts a part of RoarAudio,
10 *  a cross-platform sound system for both, home and professional use.
11 *  See README for details.
12 *
13 *  This file is free software; you can redistribute it and/or modify
14 *  it under the terms of the GNU General Public License version 3
15 *  as published by the Free Software Foundation.
16 *
17 *  RoarAudio is distributed in the hope that it will be useful,
18 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
19 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 *  GNU General Public License for more details.
21 *
22 *  You should have received a copy of the GNU General Public License
23 *  along with this software; see the file COPYING.  If not, write to
24 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
25 *  Boston, MA 02110-1301, USA.
26 *
27 *  NOTE for everyone want's to change something and send patches:
28 *  read README and HACKING! There a addition information on
29 *  the license of this document you need to read before you send
30 *  any patches.
31 *
32 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
33 *  or libpulse*:
34 *  The libs libroaresd, libroararts and libroarpulse link this libroar
35 *  and are therefore GPL. Because of this it may be illigal to use
36 *  them with any software that uses libesd, libartsc or libpulse*.
37 */
38
39#include <roaraudio.h>
40#include <kde/artsc/artsc.h>
41
42static struct roar_connection _libroarartsc_connection[1];
43
44struct _libroarartsc_stream {
45 roar_vs_t * vss;
46 int block_size;
47 int dir;
48};
49
50int arts_init(void) {
51 return roar_simple_connect(_libroarartsc_connection, NULL, "libroarartsc client");
52}
53
54void arts_free(void) {
55 roar_disconnect(_libroarartsc_connection);
56}
57
58/**
59 * asks aRtsd to free the DSP device and return 1 if it was successful,
60 * 0 if there were active non-suspendable modules
61 */
62int arts_suspend(void) {
63 return roar_set_standby(_libroarartsc_connection, ROAR_STANDBY_ACTIVE) == 0 ? 1 : 0;
64}
65
66/**
67 * asks aRtsd if the DSP device is free and return 1 if it is,
68 * 0 if not
69 */
70int arts_suspended(void) {
71 return roar_get_standby(_libroarartsc_connection) == ROAR_STANDBY_ACTIVE;
72}
73
74
75/**
76 * converts an error code to a human readable error message
77 *
78 * @param errorcode the errorcode (from another arts function that failed)
79 * @returns a text string with the error message
80 */
81const char *arts_error_text(int errorcode) {
82 return roar_vs_strerr(errorcode);
83}
84
85static arts_stream_t _arts_stream(int rate, int bits, int channels, const char *name, int dir) {
86 struct _libroarartsc_stream * s = roar_mm_malloc(sizeof(struct _libroarartsc_stream));
87 struct roar_stream * stream;
88 struct roar_audio_info auinfo;
89 struct roar_stream_info info;
90 struct roar_keyval kv[1];
91 int err = ROAR_ERROR_NONE;
92
93 if ( s == NULL )
94  return NULL;
95
96 if ( (s->vss = roar_vs_new_from_con(_libroarartsc_connection, &err)) == NULL ) {
97  roar_mm_free(s);
98  return NULL;
99 }
100
101 memset(&auinfo, 0, sizeof(auinfo));
102 auinfo.rate     = rate;
103 auinfo.channels = channels;
104 auinfo.bits     = bits;
105 auinfo.codec    = ROAR_CODEC_DEFAULT;
106
107 if ( roar_vs_stream(s->vss, &auinfo, dir, &err) == -1 ) {
108  roar_vs_close(s->vss, ROAR_VS_TRUE, &err);
109  roar_mm_free(s);
110  return NULL;
111 }
112
113 s->dir = dir;
114
115 stream = roar_vs_stream_obj(s->vss, &err);
116
117 if ( roar_stream_get_info(_libroarartsc_connection, stream, &info) != -1 ) {
118  s->block_size = info.block_size;
119 } else {
120  ROAR_WARN("_arts_stream(*): Can not get stream block size from server, assuming 1024 Byte.");
121  s->block_size = 1024;
122 }
123
124 if ( name != NULL && *name ) {
125  kv[0].key   = "description";
126  kv[0].value = (char*)name;
127
128  roar_vs_meta(s->vss, kv, 1, &err);
129 }
130
131 return (arts_stream_t) s;
132}
133
134/**
135 * open a stream for playing
136 *
137 * @param rate the sampling rate (something like 44100)
138 * @param bits how many bits each sample has (8 or 16)
139 * @param channels how many channels, 1 is mono, 2 is stereo
140 * @param name the name of the stream (these will be used so that the user can
141 *          assign streams to effects/mixer channels and similar)
142 *
143 * @return a stream
144 */
145arts_stream_t arts_play_stream(int rate, int bits, int channels, const char *name) {
146 return _arts_stream(rate, bits, channels, name, ROAR_DIR_PLAY);
147}
148
149/**
150 * open a stream for recording
151 *
152 * @param rate the sampling rate (something like 44100)
153 * @param bits how many bits each sample has (8 or 16)
154 * @param channels how many channels, 1 is mono, 2 is stereo
155 * @param name the name of the stream (these will be used so that the user can
156 *          assign streams to effects/mixer channels and similar)
157 *
158 * @return a stream
159 */
160arts_stream_t arts_record_stream(int rate, int bits, int channels, const char *name) {
161 return _arts_stream(rate, bits, channels, name, ROAR_DIR_RECORD);
162}
163
164/**
165 * close a stream
166 */
167void arts_close_stream(arts_stream_t stream) {
168 struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream;
169 if ( stream == NULL )
170  return;
171
172 roar_vs_close(s->vss, ROAR_VS_TRUE, NULL);
173
174 roar_mm_free(stream);
175}
176
177/**
178 * read samples from stream
179 *
180 * @param stream a previously opened record stream
181 * @param buffer a buffer with sample data
182 * @param count the number of bytes contained in the buffer
183 *
184 * @returns number of read bytes on success or error code
185 */
186int arts_read(arts_stream_t stream, void *buffer, int count) {
187 struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream;
188 if ( stream == NULL )
189  return -1;
190
191 return roar_vs_read(s->vss, buffer, count, NULL);
192}
193
194/**
195 * write samples to to stream
196 *
197 * @param stream a previously opened play stream
198 * @param buffer a buffer with sample data
199 * @param count the number of bytes contained in the buffer
200 *
201 * @returns number of written bytes on success or error code
202 */
203int arts_write(arts_stream_t stream, const void *buffer, int count) {
204 struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream;
205 if ( !stream )
206  return -1;
207
208 return roar_vs_write(s->vss, buffer, count, NULL);
209}
210
211/**
212 * configure a parameter of a stream
213 *
214 * @param stream an opened record or play stream
215 * @param parameter the parameter you want to modify
216 * @param value the new value
217 *
218 * @returns the new value of the parameter (which may or may not be the value
219 *          you wanted to have), or an error code if something went wrong
220 */
221int arts_stream_set(arts_stream_t stream, arts_parameter_t param, int value) {
222 struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream;
223 if ( stream == NULL )
224  return -1;
225
226 if ( param == ARTS_P_BLOCKING ) {
227  if ( roar_vs_blocking(s->vss, value ? ROAR_VS_TRUE : ROAR_VS_FALSE, NULL) == -1 )
228   return -1;
229  return arts_stream_get(stream, param);
230 }
231
232 return arts_stream_get(stream, param);
233}
234
235/**
236 * query a parameter of a stream
237 *
238 * @param stream an opened record or play stream
239 * @param parameter the parameter you want to query
240 *
241 * @returns the value of the parameter, or an error code
242 */
243int arts_stream_get(arts_stream_t stream, arts_parameter_t param) {
244 struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream;
245 struct roar_vio_select vios;
246 struct roar_vio_selecttv rtv;
247 int events;
248
249 if ( stream == NULL )
250  return -1;
251
252 if ( param == ARTS_P_PACKET_SIZE ) {
253   return s->block_size;
254 } else if ( param == ARTS_P_BUFFER_SPACE ) {
255  rtv.sec    = 0;
256  rtv.nsec   = 1000;
257
258  events     = s->dir == ROAR_DIR_PLAY ? ROAR_VIO_SELECT_WRITE : ROAR_VIO_SELECT_READ;
259
260  ROAR_VIO_SELECT_SETVIO(&vios, roar_vs_vio_obj(s->vss, NULL), events);
261
262  if ( roar_vio_select(&vios, 1, &rtv, NULL) == 1 )
263   return s->block_size;
264
265  return 0;
266 } else if ( param == ARTS_P_BUFFER_SIZE ) {
267   return s->block_size*2;
268 } else if ( param == ARTS_P_PACKET_COUNT ) {
269  return 1;
270 } else if ( param == ARTS_P_BLOCKING ) {
271  return roar_vs_blocking(s->vss, ROAR_VS_ASK, NULL) == ROAR_VS_TRUE ? 1 : 0;
272 }
273
274 return -1;
275}
276
277//ll
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