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/* $Id$ */
/***
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 <sys/mman.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"
#include "xmalloc.h"
#include "log.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("OSS Sink/Source (mmap)")
PA_MODULE_VERSION(PACKAGE_VERSION)
struct userdata {
struct pa_sink *sink;
struct pa_source *source;
struct pa_core *core;
struct pa_sample_spec sample_spec;
size_t in_fragment_size, out_fragment_size, in_fragments, out_fragments, out_fill;
int fd;
void *in_mmap, *out_mmap;
size_t in_mmap_length, out_mmap_length;
struct pa_io_event *io_event;
struct pa_memblock **in_memblocks, **out_memblocks;
unsigned out_current, in_current;
struct pa_module *module;
};
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 update_usage(struct userdata *u) {
pa_module_set_used(u->module,
(u->sink ? pa_idxset_ncontents(u->sink->inputs) : 0) +
(u->sink ? pa_idxset_ncontents(u->sink->monitor_source->outputs) : 0) +
(u->source ? pa_idxset_ncontents(u->source->outputs) : 0));
}
static void out_fill_memblocks(struct userdata *u, unsigned n) {
assert(u && u->out_memblocks);
while (n > 0) {
struct pa_memchunk chunk;
if (u->out_memblocks[u->out_current])
pa_memblock_unref_fixed(u->out_memblocks[u->out_current]);
chunk.memblock = u->out_memblocks[u->out_current] = pa_memblock_new_fixed((uint8_t*)u->out_mmap+u->out_fragment_size*u->out_current, u->out_fragment_size, u->core->memblock_stat);
assert(chunk.memblock);
chunk.length = chunk.memblock->length;
chunk.index = 0;
pa_sink_render_into_full(u->sink, &chunk);
u->out_current++;
while (u->out_current >= u->out_fragments)
u->out_current -= u->out_fragments;
n--;
}
}
static void do_write(struct userdata *u) {
struct count_info info;
assert(u && u->sink);
update_usage(u);
if (ioctl(u->fd, SNDCTL_DSP_GETOPTR, &info) < 0) {
pa_log(__FILE__": SNDCTL_DSP_GETOPTR: %s\n", strerror(errno));
return;
}
u->out_fill = (u->out_fragment_size * u->out_fragments) - (info.ptr % u->out_fragment_size);
if (!info.blocks)
return;
out_fill_memblocks(u, info.blocks);
}
static void in_post_memblocks(struct userdata *u, unsigned n) {
assert(u && u->in_memblocks);
while (n > 0) {
struct pa_memchunk chunk;
if (!u->in_memblocks[u->in_current]) {
chunk.memblock = u->in_memblocks[u->in_current] = pa_memblock_new_fixed((uint8_t*) u->in_mmap+u->in_fragment_size*u->in_current, u->in_fragment_size, u->core->memblock_stat);
chunk.length = chunk.memblock->length;
chunk.index = 0;
pa_source_post(u->source, &chunk);
}
u->in_current++;
while (u->in_current >= u->in_fragments)
u->in_current -= u->in_fragments;
n--;
}
}
static void in_clear_memblocks(struct userdata*u, unsigned n) {
unsigned i = u->in_current;
assert(u && u->in_memblocks);
if (n > u->in_fragments)
n = u->in_fragments;
while (n > 0) {
if (u->in_memblocks[i]) {
pa_memblock_unref_fixed(u->in_memblocks[i]);
u->in_memblocks[i] = NULL;
}
i++;
while (i >= u->in_fragments)
i -= u->in_fragments;
n--;
}
}
static void do_read(struct userdata *u) {
struct count_info info;
assert(u && u->source);
update_usage(u);
if (ioctl(u->fd, SNDCTL_DSP_GETIPTR, &info) < 0) {
pa_log(__FILE__": SNDCTL_DSP_GETIPTR: %s\n", strerror(errno));
return;
}
if (!info.blocks)
return;
in_post_memblocks(u, info.blocks);
in_clear_memblocks(u, u->in_fragments/2);
}
static void io_callback(struct pa_mainloop_api *m, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
struct userdata *u = userdata;
assert (u && u->core->mainloop == m && u->io_event == e);
if (f & PA_IO_EVENT_INPUT)
do_read(u);
if (f & PA_IO_EVENT_OUTPUT)
do_write(u);
}
static pa_usec_t sink_get_latency_cb(struct pa_sink *s) {
struct userdata *u = s->userdata;
assert(s && u);
do_write(u);
return pa_bytes_to_usec(u->out_fill, &s->sample_spec);
}
int pa__init(struct pa_core *c, struct pa_module*m) {
struct audio_buf_info info;
struct userdata *u = NULL;
const char *p;
int nfrags, frag_size;
int mode, caps;
int enable_bits = 0, zero = 0;
int playback = 1, record = 1;
struct pa_modargs *ma = NULL;
assert(c && m);
m->userdata = u = pa_xmalloc0(sizeof(struct userdata));
u->module = m;
u->fd = -1;
u->core = c;
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": failed to parse module arguments.\n");
goto fail;
}
if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
pa_log(__FILE__": record= and playback= expect numeric arguments.\n");
goto fail;
}
if (!playback && !record) {
pa_log(__FILE__": neither playback nor record enabled for device.\n");
goto fail;
}
mode = (playback&&record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
nfrags = 12;
frag_size = 1024;
if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
pa_log(__FILE__": failed to parse fragments arguments\n");
goto fail;
}
u->sample_spec = c->default_sample_spec;
if (pa_modargs_get_sample_spec(ma, &u->sample_spec) < 0) {
pa_log(__FILE__": failed to parse sample specification\n");
goto fail;
}
if ((u->fd = pa_oss_open(p = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), &mode, &caps)) < 0)
goto fail;
if (!(caps & DSP_CAP_MMAP) || !(caps & DSP_CAP_REALTIME) || !(caps & DSP_CAP_TRIGGER)) {
pa_log(__FILE__": OSS device not mmap capable.\n");
goto fail;
}
pa_log(__FILE__": device opened in %s mode.\n", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
if (nfrags >= 2 && frag_size >= 1)
if (pa_oss_set_fragments(u->fd, nfrags, frag_size) < 0)
goto fail;
if (pa_oss_auto_format(u->fd, &u->sample_spec) < 0)
goto fail;
if (mode != O_WRONLY) {
if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0) {
pa_log(__FILE__": SNDCTL_DSP_GETISPACE: %s\n", strerror(errno));
goto fail;
}
pa_log(__FILE__": input -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
u->in_mmap_length = (u->in_fragment_size = info.fragsize) * (u->in_fragments = info.fragstotal);
if ((u->in_mmap = mmap(NULL, u->in_mmap_length, PROT_READ, MAP_SHARED, u->fd, 0)) == MAP_FAILED) {
if (mode == O_RDWR) {
pa_log(__FILE__": mmap failed for input. Changing to O_WRONLY mode.\n");
mode = O_WRONLY;
} else {
pa_log(__FILE__": mmap(): %s\n", strerror(errno));
goto fail;
}
} else {
u->source = pa_source_new(c, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &u->sample_spec);
assert(u->source);
u->source->userdata = u;
pa_source_set_owner(u->source, m);
u->source->description = pa_sprintf_malloc("Open Sound System PCM/mmap() on '%s'", p);
u->in_memblocks = pa_xmalloc0(sizeof(struct pa_memblock *)*u->in_fragments);
enable_bits |= PCM_ENABLE_INPUT;
}
}
if (mode != O_RDONLY) {
if (ioctl(u->fd, SNDCTL_DSP_GETOSPACE, &info) < 0) {
pa_log(__FILE__": SNDCTL_DSP_GETOSPACE: %s\n", strerror(errno));
goto fail;
}
pa_log(__FILE__": output -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
u->out_mmap_length = (u->out_fragment_size = info.fragsize) * (u->out_fragments = info.fragstotal);
if ((u->out_mmap = mmap(NULL, u->out_mmap_length, PROT_WRITE, MAP_SHARED, u->fd, 0)) == MAP_FAILED) {
if (mode == O_RDWR) {
pa_log(__FILE__": mmap filed for output. Changing to O_RDONLY mode.\n");
mode = O_RDONLY;
} else {
pa_log(__FILE__": mmap(): %s\n", strerror(errno));
goto fail;
}
} else {
pa_silence_memory(u->out_mmap, u->out_mmap_length, &u->sample_spec);
u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &u->sample_spec);
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/mmap() on '%s'", p);
u->out_memblocks = pa_xmalloc0(sizeof(struct memblock *)*u->out_fragments);
enable_bits |= PCM_ENABLE_OUTPUT;
}
}
zero = 0;
if (ioctl(u->fd, SNDCTL_DSP_SETTRIGGER, &zero) < 0) {
pa_log(__FILE__": SNDCTL_DSP_SETTRIGGER: %s\n", strerror(errno));
goto fail;
}
if (ioctl(u->fd, SNDCTL_DSP_SETTRIGGER, &enable_bits) < 0) {
pa_log(__FILE__": SNDCTL_DSP_SETTRIGGER: %s\n", strerror(errno));
goto fail;
}
assert(u->source || u->sink);
u->io_event = c->mainloop->io_new(c->mainloop, u->fd, (u->source ? PA_IO_EVENT_INPUT : 0) | (u->sink ? PA_IO_EVENT_OUTPUT : 0), io_callback, u);
assert(u->io_event);
pa_modargs_free(ma);
return 0;
fail:
pa__done(c, m);
if (ma)
pa_modargs_free(ma);
return -1;
}
void pa__done(struct pa_core *c, struct pa_module*m) {
struct userdata *u;
assert(c && m);
if (!(u = m->userdata))
return;
if (u->out_memblocks) {
unsigned i;
for (i = 0; i < u->out_fragments; i++)
if (u->out_memblocks[i])
pa_memblock_unref_fixed(u->out_memblocks[i]);
pa_xfree(u->out_memblocks);
}
if (u->in_memblocks) {
unsigned i;
for (i = 0; i < u->in_fragments; i++)
if (u->in_memblocks[i])
pa_memblock_unref_fixed(u->in_memblocks[i]);
pa_xfree(u->in_memblocks);
}
if (u->in_mmap && u->in_mmap != MAP_FAILED)
munmap(u->in_mmap, u->in_mmap_length);
if (u->out_mmap && u->out_mmap != MAP_FAILED)
munmap(u->out_mmap, u->out_mmap_length);
if (u->sink)
pa_sink_free(u->sink);
if (u->source)
pa_source_free(u->source);
if (u->io_event)
u->core->mainloop->io_free(u->io_event);
if (u->fd >= 0)
close(u->fd);
pa_xfree(u);
}
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