diff options
Diffstat (limited to 'polyp/module-sine.c')
| -rw-r--r-- | polyp/module-sine.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/polyp/module-sine.c b/polyp/module-sine.c deleted file mode 100644 index 529c061a..00000000 --- a/polyp/module-sine.c +++ /dev/null @@ -1,181 +0,0 @@ -/* $Id$ */ - -/*** - 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); -} - |