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;
244 void pa_module_done(struct pa_core *c, struct pa_module*m) {
251 if (u->memchunk.memblock)
252 pa_memblock_unref(u->memchunk.memblock);
253 if (u->silence.memblock)
254 pa_memblock_unref(u->silence.memblock);
257 pa_sink_free(u->sink);
259 pa_source_free(u->source);
260 pa_iochannel_free(u->io);