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-rw-r--r--polyp/module-oss.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/polyp/module-oss.c b/polyp/module-oss.c
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--- /dev/null
+++ b/polyp/module-oss.c
@@ -0,0 +1,304 @@
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ polypaudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with polypaudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/soundcard.h>
+#include <sys/ioctl.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include "iochannel.h"
+#include "sink.h"
+#include "source.h"
+#include "module.h"
+#include "oss-util.h"
+#include "sample-util.h"
+#include "util.h"
+#include "modargs.h"
+
+struct userdata {
+ struct pa_sink *sink;
+ struct pa_source *source;
+ struct pa_iochannel *io;
+ struct pa_core *core;
+
+ struct pa_memchunk memchunk, silence;
+
+ uint32_t in_fragment_size, out_fragment_size, sample_size;
+
+ int fd;
+};
+
+static const char* const valid_modargs[] = {
+ "sink_name",
+ "source_name",
+ "device",
+ "record",
+ "playback",
+ "fragments",
+ "fragment_size",
+ "format",
+ "rate",
+ "channels",
+ NULL
+};
+
+#define DEFAULT_SINK_NAME "oss_output"
+#define DEFAULT_SOURCE_NAME "oss_input"
+#define DEFAULT_DEVICE "/dev/dsp"
+
+static void do_write(struct userdata *u) {
+ struct pa_memchunk *memchunk;
+ ssize_t r;
+ assert(u);
+
+ if (!u->sink || !pa_iochannel_is_writable(u->io))
+ return;
+
+ if (!u->memchunk.length) {
+ if (pa_sink_render(u->sink, u->out_fragment_size, &u->memchunk) < 0)
+ memchunk = &u->silence;
+ else
+ memchunk = &u->memchunk;
+ }
+
+ assert(memchunk->memblock && memchunk->length);
+
+ if ((r = pa_iochannel_write(u->io, memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
+ fprintf(stderr, "write() failed: %s\n", strerror(errno));
+ return;
+ }
+
+ if (memchunk == &u->silence)
+ assert(r % u->sample_size == 0);
+ else {
+ u->memchunk.index += r;
+ u->memchunk.length -= r;
+
+ if (u->memchunk.length <= 0) {
+ pa_memblock_unref(u->memchunk.memblock);
+ u->memchunk.memblock = NULL;
+ }
+ }
+}
+
+static void do_read(struct userdata *u) {
+ struct pa_memchunk memchunk;
+ ssize_t r;
+ assert(u);
+
+ if (!u->source || !pa_iochannel_is_readable(u->io))
+ return;
+
+ memchunk.memblock = pa_memblock_new(u->in_fragment_size);
+ assert(memchunk.memblock);
+ if ((r = pa_iochannel_read(u->io, memchunk.memblock->data, memchunk.memblock->length)) < 0) {
+ pa_memblock_unref(memchunk.memblock);
+ if (errno != EAGAIN)
+ fprintf(stderr, "read() failed: %s\n", strerror(errno));
+ return;
+ }
+
+ assert(r <= (ssize_t) memchunk.memblock->length);
+ memchunk.length = memchunk.memblock->length = r;
+ memchunk.index = 0;
+
+ pa_source_post(u->source, &memchunk);
+ pa_memblock_unref(memchunk.memblock);
+};
+
+static void io_callback(struct pa_iochannel *io, void*userdata) {
+ struct userdata *u = userdata;
+ assert(u);
+ do_write(u);
+ do_read(u);
+}
+
+static uint32_t sink_get_latency_cb(struct pa_sink *s) {
+ int arg;
+ struct userdata *u = s->userdata;
+ assert(s && u && u->sink);
+
+ if (ioctl(u->fd, SNDCTL_DSP_GETODELAY, &arg) < 0) {
+ fprintf(stderr, "module-oss: device doesn't support SNDCTL_DSP_GETODELAY.\n");
+ s->get_latency = NULL;
+ return 0;
+ }
+
+ return pa_samples_usec(arg, &s->sample_spec);
+}
+
+int pa_module_init(struct pa_core *c, struct pa_module*m) {
+ struct audio_buf_info info;
+ struct userdata *u = NULL;
+ const char *p;
+ int fd = -1;
+ int nfrags, frag_size, in_frag_size, out_frag_size;
+ int mode;
+ uint32_t record = 1, playback = 1;
+ struct pa_sample_spec ss;
+ struct pa_modargs *ma = NULL;
+ assert(c && m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ fprintf(stderr, __FILE__": failed to parse module arguments.\n");
+ goto fail;
+ }
+
+ if (pa_modargs_get_value_u32(ma, "record", &record) < 0 || pa_modargs_get_value_u32(ma, "playback", &playback) < 0) {
+ fprintf(stderr, __FILE__": record= and playback= expect numeric argument.\n");
+ goto fail;
+ }
+
+ mode = (playback&&record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
+ if (mode == 0) {
+ fprintf(stderr, __FILE__": neither playback nor record enabled for device.\n");
+ goto fail;
+ }
+
+ nfrags = 12;
+ frag_size = 1024;
+ if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 || nfrags < 2 || pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0 || frag_size < 1) {
+ fprintf(stderr, __FILE__": failed to parse fragments arguments\n");
+ goto fail;
+ }
+
+ ss = c->default_sample_spec;
+ if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
+ fprintf(stderr, __FILE__": failed to parse sample specification\n");
+ goto fail;
+ }
+
+ if ((fd = pa_oss_open(p = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), &mode, NULL)) < 0)
+ goto fail;
+
+ fprintf(stderr, "module-oss: device opened in %s mode.\n", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
+
+ if (pa_oss_set_fragments(fd, nfrags, frag_size) < 0)
+ goto fail;
+
+ if (pa_oss_auto_format(fd, &ss) < 0)
+ goto fail;
+
+ if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
+ fprintf(stderr, "SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno));
+ goto fail;
+ }
+ assert(frag_size);
+ in_frag_size = out_frag_size = frag_size;
+
+ if (ioctl(fd, SNDCTL_DSP_GETISPACE, &info) >= 0) {
+ fprintf(stderr, "module-oss: input -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
+ in_frag_size = info.fragsize;
+ }
+
+ if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) >= 0) {
+ fprintf(stderr, "module-oss: output -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
+ out_frag_size = info.fragsize;
+ }
+
+ u = malloc(sizeof(struct userdata));
+ assert(u);
+
+ u->core = c;
+
+ if (mode != O_WRONLY) {
+ u->source = pa_source_new(c, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
+ assert(u->source);
+ u->source->userdata = u;
+ pa_source_set_owner(u->source, m);
+ u->source->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
+ } else
+ u->source = NULL;
+
+ if (mode != O_RDONLY) {
+ u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss);
+ assert(u->sink);
+ u->sink->get_latency = sink_get_latency_cb;
+ u->sink->userdata = u;
+ pa_sink_set_owner(u->sink, m);
+ u->sink->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
+ } else
+ u->sink = NULL;
+
+ assert(u->source || u->sink);
+
+ u->io = pa_iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : 0);
+ assert(u->io);
+ pa_iochannel_set_callback(u->io, io_callback, u);
+ u->fd = fd;
+
+ u->memchunk.memblock = NULL;
+ u->memchunk.length = 0;
+ u->sample_size = pa_sample_size(&ss);
+
+ u->out_fragment_size = out_frag_size;
+ u->in_fragment_size = in_frag_size;
+ u->silence.memblock = pa_memblock_new(u->silence.length = u->out_fragment_size);
+ assert(u->silence.memblock);
+ pa_silence_memblock(u->silence.memblock, &ss);
+ u->silence.index = 0;
+
+ m->userdata = u;
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (fd >= 0)
+ close(fd);
+
+ if (ma)
+ pa_modargs_free(ma);
+
+ return -1;
+}
+
+void pa_module_done(struct pa_core *c, struct pa_module*m) {
+ struct userdata *u;
+ assert(c && m);
+
+ u = m->userdata;
+ assert(u);
+
+ if (u->memchunk.memblock)
+ pa_memblock_unref(u->memchunk.memblock);
+ if (u->silence.memblock)
+ pa_memblock_unref(u->silence.memblock);
+
+ if (u->sink)
+ pa_sink_free(u->sink);
+ if (u->source)
+ pa_source_free(u->source);
+ pa_iochannel_free(u->io);
+ free(u);
+}