+++ /dev/null
-/* $Id$ */
-
-/***
- This file is part of polypaudio.
-
- polypaudio is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser 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 Lesser 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 <stdio.h>
-#include <assert.h>
-#include <math.h>
-
-#include "sink-input.h"
-#include "module.h"
-#include "modargs.h"
-#include "xmalloc.h"
-#include "namereg.h"
-#include "log.h"
-#include "module-sine-symdef.h"
-
-PA_MODULE_AUTHOR("Lennart Poettering")
-PA_MODULE_DESCRIPTION("Sine wave generator")
-PA_MODULE_USAGE("sink=<sink to connect to> frequency=<frequency in Hz>")
-PA_MODULE_VERSION(PACKAGE_VERSION)
-
-struct userdata {
- pa_core *core;
- pa_module *module;
- pa_sink_input *sink_input;
- pa_memblock *memblock;
- size_t peek_index;
-};
-
-static const char* const valid_modargs[] = {
- "sink",
- "frequency",
- NULL,
-};
-
-static int sink_input_peek(pa_sink_input *i, pa_memchunk *chunk) {
- struct userdata *u;
- assert(i && chunk && i->userdata);
- u = i->userdata;
-
- chunk->memblock = pa_memblock_ref(u->memblock);
- chunk->index = u->peek_index;
- chunk->length = u->memblock->length - u->peek_index;
- return 0;
-}
-
-static void sink_input_drop(pa_sink_input *i, const pa_memchunk *chunk, size_t length) {
- struct userdata *u;
- assert(i && chunk && length && i->userdata);
- u = i->userdata;
-
- assert(chunk->memblock == u->memblock && length <= u->memblock->length-u->peek_index);
-
- u->peek_index += length;
-
- if (u->peek_index >= u->memblock->length)
- u->peek_index = 0;
-}
-
-static void sink_input_kill(pa_sink_input *i) {
- struct userdata *u;
- assert(i && i->userdata);
- u = i->userdata;
-
- pa_sink_input_disconnect(u->sink_input);
- pa_sink_input_unref(u->sink_input);
- u->sink_input = NULL;
-
- pa_module_unload_request(u->module);
-}
-
-static void calc_sine(float *f, size_t l, float freq) {
- size_t i;
-
- l /= sizeof(float);
-
- for (i = 0; i < l; i++)
- f[i] = (float) sin((double) i/l*M_PI*2*freq)/2;
-}
-
-int pa__init(pa_core *c, pa_module*m) {
- pa_modargs *ma = NULL;
- struct userdata *u;
- pa_sink *sink;
- const char *sink_name;
- pa_sample_spec ss;
- uint32_t frequency;
- char t[256];
-
- if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- pa_log(__FILE__": Failed to parse module arguments\n");
- goto fail;
- }
-
- m->userdata = u = pa_xmalloc(sizeof(struct userdata));
- u->core = c;
- u->module = m;
- u->sink_input = NULL;
- u->memblock = NULL;
-
- sink_name = pa_modargs_get_value(ma, "sink", NULL);
-
- if (!(sink = pa_namereg_get(c, sink_name, PA_NAMEREG_SINK, 1))) {
- pa_log(__FILE__": No such sink.\n");
- goto fail;
- }
-
- ss.format = PA_SAMPLE_FLOAT32;
- ss.rate = sink->sample_spec.rate;
- ss.channels = 1;
-
- frequency = 440;
- if (pa_modargs_get_value_u32(ma, "frequency", &frequency) < 0 || frequency < 1 || frequency > ss.rate/2) {
- pa_log(__FILE__": Invalid frequency specification\n");
- goto fail;
- }
-
- u->memblock = pa_memblock_new(pa_bytes_per_second(&ss), c->memblock_stat);
- calc_sine(u->memblock->data, u->memblock->length, frequency);
-
- snprintf(t, sizeof(t), "Sine Generator at %u Hz", frequency);
- if (!(u->sink_input = pa_sink_input_new(sink, __FILE__, t, &ss, NULL, 0, -1)))
- goto fail;
-
- u->sink_input->peek = sink_input_peek;
- u->sink_input->drop = sink_input_drop;
- u->sink_input->kill = sink_input_kill;
- u->sink_input->userdata = u;
- u->sink_input->owner = m;
-
- u->peek_index = 0;
-
- pa_modargs_free(ma);
- return 0;
-
-fail:
- if (ma)
- pa_modargs_free(ma);
-
- pa__done(c, m);
- return -1;
-}
-
-void pa__done(pa_core *c, pa_module*m) {
- struct userdata *u = m->userdata;
- assert(c && m);
-
- if (!u)
- return;
-
- if (u->sink_input) {
- pa_sink_input_disconnect(u->sink_input);
- pa_sink_input_unref(u->sink_input);
- }
-
- if (u->memblock)
- pa_memblock_unref(u->memblock);
- pa_xfree(u);
-}
-