1 #include <sys/soundcard.h>
13 #include "iochannel.h"
18 #include "sample-util.h"
23 struct pa_source *source;
24 struct pa_iochannel *io;
27 struct pa_memchunk memchunk, silence;
29 uint32_t in_fragment_size, out_fragment_size, sample_size;
34 static void do_write(struct userdata *u) {
35 struct pa_memchunk *memchunk;
39 if (!u->sink || !pa_iochannel_is_writable(u->io))
42 if (!u->memchunk.length) {
43 if (pa_sink_render(u->sink, u->out_fragment_size, &u->memchunk) < 0)
44 memchunk = &u->silence;
46 memchunk = &u->memchunk;
49 assert(memchunk->memblock && memchunk->length);
51 if ((r = pa_iochannel_write(u->io, memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
52 fprintf(stderr, "write() failed: %s\n", strerror(errno));
56 if (memchunk == &u->silence)
57 assert(r % u->sample_size == 0);
59 u->memchunk.index += r;
60 u->memchunk.length -= r;
62 if (u->memchunk.length <= 0) {
63 pa_memblock_unref(u->memchunk.memblock);
64 u->memchunk.memblock = NULL;
69 static void do_read(struct userdata *u) {
70 struct pa_memchunk memchunk;
74 if (!u->source || !pa_iochannel_is_readable(u->io))
77 memchunk.memblock = pa_memblock_new(u->in_fragment_size);
78 assert(memchunk.memblock);
79 if ((r = pa_iochannel_read(u->io, memchunk.memblock->data, memchunk.memblock->length)) < 0) {
80 pa_memblock_unref(memchunk.memblock);
82 fprintf(stderr, "read() failed: %s\n", strerror(errno));
86 assert(r <= (ssize_t) memchunk.memblock->length);
87 memchunk.length = memchunk.memblock->length = r;
90 pa_source_post(u->source, &memchunk);
91 pa_memblock_unref(memchunk.memblock);
94 static void io_callback(struct pa_iochannel *io, void*userdata) {
95 struct userdata *u = userdata;
101 static uint32_t sink_get_latency_cb(struct pa_sink *s) {
103 struct userdata *u = s->userdata;
104 assert(s && u && u->sink);
106 if (ioctl(u->fd, SNDCTL_DSP_GETODELAY, &arg) < 0) {
107 fprintf(stderr, "module-oss: device doesn't support SNDCTL_DSP_GETODELAY.\n");
108 s->get_latency = NULL;
112 return pa_samples_usec(arg, &s->sample_spec);
115 int pa_module_init(struct pa_core *c, struct pa_module*m) {
116 struct audio_buf_info info;
117 struct userdata *u = NULL;
120 int frag_size, in_frag_size, out_frag_size;
122 struct pa_sample_spec ss;
125 p = m->argument ? m->argument : "/dev/dsp";
126 if ((fd = open(p, (mode = O_RDWR)|O_NDELAY)) >= 0) {
129 ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
131 if (ioctl(fd, SNDCTL_DSP_GETCAPS, &caps) < 0) {
132 fprintf(stderr, "SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
136 if (!(caps & DSP_CAP_DUPLEX)) {
143 if ((fd = open(p, (mode = O_WRONLY)|O_NDELAY)) < 0) {
144 if ((fd = open(p, (mode = O_RDONLY)|O_NDELAY)) < 0) {
145 fprintf(stderr, "open('%s'): %s\n", p, strerror(errno));
151 fprintf(stderr, "module-oss: device opened in %s mode.\n", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
153 frag_size = ((int) 12 << 16) | 10; /* nfrags = 12; frag_size = 2^10 */
154 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag_size) < 0) {
155 fprintf(stderr, "SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno));
159 if (pa_oss_auto_format(fd, &ss) < 0)
162 if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
163 fprintf(stderr, "SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno));
167 in_frag_size = out_frag_size = frag_size;
169 if (ioctl(fd, SNDCTL_DSP_GETISPACE, &info) >= 0) {
170 fprintf(stderr, "module-oss: input -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
171 in_frag_size = info.fragsize;
174 if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) >= 0) {
175 fprintf(stderr, "module-oss: output -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
176 out_frag_size = info.fragsize;
179 u = malloc(sizeof(struct userdata));
184 if (mode != O_WRONLY) {
185 u->source = pa_source_new(c, "oss_input", 0, &ss);
187 u->source->userdata = u;
188 pa_source_set_owner(u->source, m);
189 u->sink->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
193 if (mode != O_RDONLY) {
194 u->sink = pa_sink_new(c, "oss_output", 0, &ss);
196 u->sink->get_latency = sink_get_latency_cb;
197 u->sink->userdata = u;
198 pa_sink_set_owner(u->sink, m);
199 u->sink->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
203 assert(u->source || u->sink);
205 u->io = pa_iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : 0);
207 pa_iochannel_set_callback(u->io, io_callback, u);
210 u->memchunk.memblock = NULL;
211 u->memchunk.length = 0;
212 u->sample_size = pa_sample_size(&ss);
214 u->out_fragment_size = out_frag_size;
215 u->in_fragment_size = in_frag_size;
216 u->silence.memblock = pa_memblock_new(u->silence.length = u->out_fragment_size);
217 assert(u->silence.memblock);
218 pa_silence_memblock(u->silence.memblock, &ss);
219 u->silence.index = 0;
232 void pa_module_done(struct pa_core *c, struct pa_module*m) {
239 if (u->memchunk.memblock)
240 pa_memblock_unref(u->memchunk.memblock);
241 if (u->silence.memblock)
242 pa_memblock_unref(u->silence.memblock);
245 pa_sink_free(u->sink);
247 pa_source_free(u->source);
248 pa_iochannel_free(u->io);