Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 209 insertions, 0 deletions

diff --git a/src/modules/module-sine.c b/src/modules/module-sine.c
new file mode 100644
index 0000000..656a692
--- /dev/null
+++ b/src/modules/module-sine.c
@@ -0,0 +1,209 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio 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 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/sink-input.h>
+#include <pulsecore/module.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/log.h>
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("Sine wave generator");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(false);
+PA_MODULE_USAGE(
+        "sink=<sink to connect to> "
+        "rate=<sample rate> "
+        "frequency=<frequency in Hz>");
+
+struct userdata {
+    pa_core *core;
+    pa_module *module;
+    pa_sink_input *sink_input;
+    pa_memchunk memchunk;
+    size_t peek_index;
+};
+
+static const char* const valid_modargs[] = {
+    "sink",
+    "rate",
+    "frequency",
+    NULL,
+};
+
+static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+    pa_assert(chunk);
+
+    *chunk = u->memchunk;
+    pa_memblock_ref(chunk->memblock);
+
+    chunk->index += u->peek_index;
+    chunk->length -= u->peek_index;
+
+    u->peek_index = 0;
+
+    return 0;
+}
+
+static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    nbytes %= u->memchunk.length;
+
+    if (u->peek_index >= nbytes)
+        u->peek_index -= nbytes;
+    else
+        u->peek_index = u->memchunk.length + u->peek_index - nbytes;
+}
+
+static void sink_input_kill_cb(pa_sink_input *i) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    pa_sink_input_unlink(u->sink_input);
+    pa_sink_input_unref(u->sink_input);
+    u->sink_input = NULL;
+
+    pa_module_unload_request(u->module, true);
+}
+
+/* Called from IO thread context */
+static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
+    struct userdata *u;
+
+    pa_sink_input_assert_ref(i);
+    pa_assert_se(u = i->userdata);
+
+    /* If we are added for the first time, ask for a rewinding so that
+     * we are heard right-away. */
+    if (PA_SINK_INPUT_IS_LINKED(state) &&
+        i->thread_info.state == PA_SINK_INPUT_INIT && i->sink)
+        pa_sink_input_request_rewind(i, 0, false, true, true);
+}
+
+int pa__init(pa_module*m) {
+    pa_modargs *ma = NULL;
+    struct userdata *u;
+    pa_sink *sink;
+    pa_sample_spec ss;
+    uint32_t frequency;
+    pa_sink_input_new_data data;
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log("Failed to parse module arguments");
+        goto fail;
+    }
+
+    if (!(sink = pa_namereg_get(m->core, pa_modargs_get_value(ma, "sink", NULL), PA_NAMEREG_SINK))) {
+        pa_log("No such sink.");
+        goto fail;
+    }
+
+    ss.format = PA_SAMPLE_FLOAT32;
+    ss.rate = sink->sample_spec.rate;
+    ss.channels = 1;
+
+    if (pa_modargs_get_sample_rate(ma, &ss.rate) < 0) {
+        pa_log("Invalid rate specification");
+        goto fail;
+    }
+
+    frequency = 440;
+    if (pa_modargs_get_value_u32(ma, "frequency", &frequency) < 0 || frequency < 1 || frequency > ss.rate/2) {
+        pa_log("Invalid frequency specification");
+        goto fail;
+    }
+
+    m->userdata = u = pa_xnew0(struct userdata, 1);
+    u->core = m->core;
+    u->module = m;
+    u->sink_input = NULL;
+
+    u->peek_index = 0;
+    pa_memchunk_sine(&u->memchunk, m->core->mempool, ss.rate, frequency);
+
+    pa_sink_input_new_data_init(&data);
+    data.driver = __FILE__;
+    data.module = m;
+    pa_sink_input_new_data_set_sink(&data, sink, false, true);
+    pa_proplist_setf(data.proplist, PA_PROP_MEDIA_NAME, "%u Hz Sine", frequency);
+    pa_proplist_sets(data.proplist, PA_PROP_MEDIA_ROLE, "abstract");
+    pa_proplist_setf(data.proplist, "sine.hz", "%u", frequency);
+    pa_sink_input_new_data_set_sample_spec(&data, &ss);
+
+    pa_sink_input_new(&u->sink_input, m->core, &data);
+    pa_sink_input_new_data_done(&data);
+
+    if (!u->sink_input)
+        goto fail;
+
+    u->sink_input->pop = sink_input_pop_cb;
+    u->sink_input->process_rewind = sink_input_process_rewind_cb;
+    u->sink_input->kill = sink_input_kill_cb;
+    u->sink_input->state_change = sink_input_state_change_cb;
+    u->sink_input->userdata = u;
+
+    pa_sink_input_put(u->sink_input);
+
+    pa_modargs_free(ma);
+    return 0;
+
+fail:
+    if (ma)
+        pa_modargs_free(ma);
+
+    pa__done(m);
+    return -1;
+}
+
+void pa__done(pa_module*m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    if (u->sink_input) {
+        pa_sink_input_unlink(u->sink_input);
+        pa_sink_input_unref(u->sink_input);
+    }
+
+    if (u->memchunk.memblock)
+        pa_memblock_unref(u->memchunk.memblock);
+
+    pa_xfree(u);
+}