]>
code.delx.au - pulseaudio/blob - src/module-oss.c
1 #include <sys/soundcard.h>
13 #include "iochannel.h"
18 #include "sample-util.h"
24 struct pa_source
*source
;
25 struct pa_iochannel
*io
;
28 struct pa_memchunk memchunk
, silence
;
30 uint32_t in_fragment_size
, out_fragment_size
, sample_size
;
35 static const char* const valid_modargs
[] = {
44 #define DEFAULT_SINK_NAME "oss_output"
45 #define DEFAULT_SOURCE_NAME "oss_input"
46 #define DEFAULT_DEVICE "/dev/dsp"
48 static void do_write(struct userdata
*u
) {
49 struct pa_memchunk
*memchunk
;
53 if (!u
->sink
|| !pa_iochannel_is_writable(u
->io
))
56 if (!u
->memchunk
.length
) {
57 if (pa_sink_render(u
->sink
, u
->out_fragment_size
, &u
->memchunk
) < 0)
58 memchunk
= &u
->silence
;
60 memchunk
= &u
->memchunk
;
63 assert(memchunk
->memblock
&& memchunk
->length
);
65 if ((r
= pa_iochannel_write(u
->io
, memchunk
->memblock
->data
+ memchunk
->index
, memchunk
->length
)) < 0) {
66 fprintf(stderr
, "write() failed: %s\n", strerror(errno
));
70 if (memchunk
== &u
->silence
)
71 assert(r
% u
->sample_size
== 0);
73 u
->memchunk
.index
+= r
;
74 u
->memchunk
.length
-= r
;
76 if (u
->memchunk
.length
<= 0) {
77 pa_memblock_unref(u
->memchunk
.memblock
);
78 u
->memchunk
.memblock
= NULL
;
83 static void do_read(struct userdata
*u
) {
84 struct pa_memchunk memchunk
;
88 if (!u
->source
|| !pa_iochannel_is_readable(u
->io
))
91 memchunk
.memblock
= pa_memblock_new(u
->in_fragment_size
);
92 assert(memchunk
.memblock
);
93 if ((r
= pa_iochannel_read(u
->io
, memchunk
.memblock
->data
, memchunk
.memblock
->length
)) < 0) {
94 pa_memblock_unref(memchunk
.memblock
);
96 fprintf(stderr
, "read() failed: %s\n", strerror(errno
));
100 assert(r
<= (ssize_t
) memchunk
.memblock
->length
);
101 memchunk
.length
= memchunk
.memblock
->length
= r
;
104 pa_source_post(u
->source
, &memchunk
);
105 pa_memblock_unref(memchunk
.memblock
);
108 static void io_callback(struct pa_iochannel
*io
, void*userdata
) {
109 struct userdata
*u
= userdata
;
115 static uint32_t sink_get_latency_cb(struct pa_sink
*s
) {
117 struct userdata
*u
= s
->userdata
;
118 assert(s
&& u
&& u
->sink
);
120 if (ioctl(u
->fd
, SNDCTL_DSP_GETODELAY
, &arg
) < 0) {
121 fprintf(stderr
, "module-oss: device doesn't support SNDCTL_DSP_GETODELAY.\n");
122 s
->get_latency
= NULL
;
126 return pa_samples_usec(arg
, &s
->sample_spec
);
129 int pa_module_init(struct pa_core
*c
, struct pa_module
*m
) {
130 struct audio_buf_info info
;
131 struct userdata
*u
= NULL
;
134 int frag_size
, in_frag_size
, out_frag_size
;
136 uint32_t record
= 1, playback
= 1;
137 struct pa_sample_spec ss
;
138 struct pa_modargs
*ma
= NULL
;
141 if (!(ma
= pa_modargs_new(m
->argument
, valid_modargs
))) {
142 fprintf(stderr
, __FILE__
": failed to parse module arguments.\n");
146 if (pa_modargs_get_value_u32(ma
, "record", &record
) < 0 || pa_modargs_get_value_u32(ma
, "playback", &playback
) < 0) {
147 fprintf(stderr
, __FILE__
": record= and playback= expect numeric argument.\n");
151 mode
= (playback
&&record
) ? O_RDWR
: (playback
? O_WRONLY
: (record
? O_RDONLY
: 0));
153 fprintf(stderr
, __FILE__
": neither playback nor record enabled for device.\n");
157 if ((fd
= pa_oss_open(p
= pa_modargs_get_value(ma
, "device", DEFAULT_DEVICE
), &mode
, NULL
)) < 0)
160 fprintf(stderr
, "module-oss: device opened in %s mode.\n", mode
== O_WRONLY
? "O_WRONLY" : (mode
== O_RDONLY
? "O_RDONLY" : "O_RDWR"));
162 frag_size
= ((int) 12 << 16) | 10; /* nfrags = 12; frag_size = 2^10 */
163 if (ioctl(fd
, SNDCTL_DSP_SETFRAGMENT
, &frag_size
) < 0) {
164 fprintf(stderr
, "SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno
));
168 if (pa_oss_auto_format(fd
, &ss
) < 0)
171 if (ioctl(fd
, SNDCTL_DSP_GETBLKSIZE
, &frag_size
) < 0) {
172 fprintf(stderr
, "SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno
));
176 in_frag_size
= out_frag_size
= frag_size
;
178 if (ioctl(fd
, SNDCTL_DSP_GETISPACE
, &info
) >= 0) {
179 fprintf(stderr
, "module-oss: input -- %u fragments of size %u.\n", info
.fragstotal
, info
.fragsize
);
180 in_frag_size
= info
.fragsize
;
183 if (ioctl(fd
, SNDCTL_DSP_GETOSPACE
, &info
) >= 0) {
184 fprintf(stderr
, "module-oss: output -- %u fragments of size %u.\n", info
.fragstotal
, info
.fragsize
);
185 out_frag_size
= info
.fragsize
;
188 u
= malloc(sizeof(struct userdata
));
193 if (mode
!= O_WRONLY
) {
194 u
->source
= pa_source_new(c
, pa_modargs_get_value(ma
, "source_name", DEFAULT_SOURCE_NAME
), 0, &ss
);
196 u
->source
->userdata
= u
;
197 pa_source_set_owner(u
->source
, m
);
198 u
->source
->description
= pa_sprintf_malloc("Open Sound System PCM on '%s'", p
);
202 if (mode
!= O_RDONLY
) {
203 u
->sink
= pa_sink_new(c
, pa_modargs_get_value(ma
, "sink_name", DEFAULT_SINK_NAME
), 0, &ss
);
205 u
->sink
->get_latency
= sink_get_latency_cb
;
206 u
->sink
->userdata
= u
;
207 pa_sink_set_owner(u
->sink
, m
);
208 u
->sink
->description
= pa_sprintf_malloc("Open Sound System PCM on '%s'", p
);
212 assert(u
->source
|| u
->sink
);
214 u
->io
= pa_iochannel_new(c
->mainloop
, u
->source
? fd
: -1, u
->sink
? fd
: 0);
216 pa_iochannel_set_callback(u
->io
, io_callback
, u
);
219 u
->memchunk
.memblock
= NULL
;
220 u
->memchunk
.length
= 0;
221 u
->sample_size
= pa_sample_size(&ss
);
223 u
->out_fragment_size
= out_frag_size
;
224 u
->in_fragment_size
= in_frag_size
;
225 u
->silence
.memblock
= pa_memblock_new(u
->silence
.length
= u
->out_fragment_size
);
226 assert(u
->silence
.memblock
);
227 pa_silence_memblock(u
->silence
.memblock
, &ss
);
228 u
->silence
.index
= 0;
246 void pa_module_done(struct pa_core
*c
, struct pa_module
*m
) {
253 if (u
->memchunk
.memblock
)
254 pa_memblock_unref(u
->memchunk
.memblock
);
255 if (u
->silence
.memblock
)
256 pa_memblock_unref(u
->silence
.memblock
);
259 pa_sink_free(u
->sink
);
261 pa_source_free(u
->source
);
262 pa_iochannel_free(u
->io
);