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-rw-r--r--src/polyp/polyplib-simple.c393
1 files changed, 393 insertions, 0 deletions
diff --git a/src/polyp/polyplib-simple.c b/src/polyp/polyplib-simple.c
new file mode 100644
index 00000000..7436f007
--- /dev/null
+++ b/src/polyp/polyplib-simple.c
@@ -0,0 +1,393 @@
+/* $Id$ */
+
+/***
+ 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 <string.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "polyplib-simple.h"
+#include "polyplib.h"
+#include "mainloop.h"
+#include <polypcore/native-common.h>
+#include <polypcore/xmalloc.h>
+#include <polypcore/log.h>
+
+struct pa_simple {
+ pa_mainloop *mainloop;
+ pa_context *context;
+ pa_stream *stream;
+ pa_stream_direction_t direction;
+
+ int dead;
+
+ void *read_data;
+ size_t read_index, read_length;
+ pa_usec_t latency;
+};
+
+static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata);
+
+static int check_error(pa_simple *p, int *rerror) {
+ pa_context_state_t cst;
+ pa_stream_state_t sst;
+ assert(p);
+
+ if ((cst = pa_context_get_state(p->context)) == PA_CONTEXT_FAILED)
+ goto fail;
+
+ assert(cst != PA_CONTEXT_TERMINATED);
+
+ if (p->stream) {
+ if ((sst = pa_stream_get_state(p->stream)) == PA_STREAM_FAILED)
+ goto fail;
+
+ assert(sst != PA_STREAM_TERMINATED);
+ }
+
+ return 0;
+
+fail:
+ if (rerror)
+ *rerror = pa_context_errno(p->context);
+
+ p->dead = 1;
+
+ return -1;
+}
+
+static int iterate(pa_simple *p, int block, int *rerror) {
+ assert(p && p->context && p->mainloop);
+
+ if (check_error(p, rerror) < 0)
+ return -1;
+
+ if (!block && !pa_context_is_pending(p->context))
+ return 0;
+
+ do {
+ if (pa_mainloop_iterate(p->mainloop, 1, NULL) < 0) {
+ if (rerror)
+ *rerror = PA_ERROR_INTERNAL;
+ return -1;
+ }
+
+ if (check_error(p, rerror) < 0)
+ return -1;
+
+ } while (pa_context_is_pending(p->context));
+
+
+ while (pa_mainloop_deferred_pending(p->mainloop)) {
+
+ if (pa_mainloop_iterate(p->mainloop, 0, NULL) < 0) {
+ if (rerror)
+ *rerror = PA_ERROR_INTERNAL;
+ return -1;
+ }
+
+ if (check_error(p, rerror) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+pa_simple* pa_simple_new(
+ const char *server,
+ const char *name,
+ pa_stream_direction_t dir,
+ const char *dev,
+ const char *stream_name,
+ const pa_sample_spec *ss,
+ const pa_buffer_attr *attr,
+ int *rerror) {
+
+ pa_simple *p;
+ int error = PA_ERROR_INTERNAL;
+ assert(ss && (dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD));
+
+ p = pa_xmalloc(sizeof(pa_simple));
+ p->context = NULL;
+ p->stream = NULL;
+ p->mainloop = pa_mainloop_new();
+ assert(p->mainloop);
+ p->dead = 0;
+ p->direction = dir;
+ p->read_data = NULL;
+ p->read_index = p->read_length = 0;
+ p->latency = 0;
+
+ if (!(p->context = pa_context_new(pa_mainloop_get_api(p->mainloop), name)))
+ goto fail;
+
+ pa_context_connect(p->context, server, 1, NULL);
+
+ /* Wait until the context is ready */
+ while (pa_context_get_state(p->context) != PA_CONTEXT_READY) {
+ if (iterate(p, 1, &error) < 0)
+ goto fail;
+ }
+
+ if (!(p->stream = pa_stream_new(p->context, stream_name, ss, NULL)))
+ goto fail;
+
+ if (dir == PA_STREAM_PLAYBACK)
+ pa_stream_connect_playback(p->stream, dev, attr, 0, NULL);
+ else
+ pa_stream_connect_record(p->stream, dev, attr, 0);
+
+ /* Wait until the stream is ready */
+ while (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
+ if (iterate(p, 1, &error) < 0)
+ goto fail;
+ }
+
+ pa_stream_set_read_callback(p->stream, read_callback, p);
+
+ return p;
+
+fail:
+ if (rerror)
+ *rerror = error;
+ pa_simple_free(p);
+ return NULL;
+}
+
+void pa_simple_free(pa_simple *s) {
+ assert(s);
+
+ pa_xfree(s->read_data);
+
+ if (s->stream)
+ pa_stream_unref(s->stream);
+
+ if (s->context)
+ pa_context_unref(s->context);
+
+ if (s->mainloop)
+ pa_mainloop_free(s->mainloop);
+
+ pa_xfree(s);
+}
+
+int pa_simple_write(pa_simple *p, const void*data, size_t length, int *rerror) {
+ assert(p && data && p->direction == PA_STREAM_PLAYBACK);
+
+ if (p->dead) {
+ if (rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return -1;
+ }
+
+ while (length > 0) {
+ size_t l;
+
+ while (!(l = pa_stream_writable_size(p->stream)))
+ if (iterate(p, 1, rerror) < 0)
+ return -1;
+
+ if (l > length)
+ l = length;
+
+ pa_stream_write(p->stream, data, l, NULL, 0);
+ data = (const uint8_t*) data + l;
+ length -= l;
+ }
+
+ /* Make sure that no data is pending for write */
+ if (iterate(p, 0, rerror) < 0)
+ return -1;
+
+ return 0;
+}
+
+static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata) {
+ pa_simple *p = userdata;
+ assert(s && data && length && p);
+
+ if (p->read_data) {
+ pa_log(__FILE__": Buffer overflow, dropping incoming memory blocks.\n");
+ pa_xfree(p->read_data);
+ }
+
+ p->read_data = pa_xmemdup(data, p->read_length = length);
+ p->read_index = 0;
+}
+
+int pa_simple_read(pa_simple *p, void*data, size_t length, int *rerror) {
+ assert(p && data && p->direction == PA_STREAM_RECORD);
+
+ if (p->dead) {
+ if (rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return -1;
+ }
+
+ while (length > 0) {
+ if (p->read_data) {
+ size_t l = length;
+
+ if (p->read_length <= l)
+ l = p->read_length;
+
+ memcpy(data, (uint8_t*) p->read_data+p->read_index, l);
+
+ data = (uint8_t*) data + l;
+ length -= l;
+
+ p->read_index += l;
+ p->read_length -= l;
+
+ if (!p->read_length) {
+ pa_xfree(p->read_data);
+ p->read_data = NULL;
+ p->read_index = 0;
+ }
+
+ if (!length)
+ return 0;
+
+ assert(!p->read_data);
+ }
+
+ if (iterate(p, 1, rerror) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+static void drain_or_flush_complete(pa_stream *s, int success, void *userdata) {
+ pa_simple *p = userdata;
+ assert(s && p);
+ if (!success)
+ p->dead = 1;
+}
+
+int pa_simple_drain(pa_simple *p, int *rerror) {
+ pa_operation *o;
+ assert(p && p->direction == PA_STREAM_PLAYBACK);
+
+ if (p->dead) {
+ if (rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return -1;
+ }
+
+ o = pa_stream_drain(p->stream, drain_or_flush_complete, p);
+
+ while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
+ if (iterate(p, 1, rerror) < 0) {
+ pa_operation_cancel(o);
+ pa_operation_unref(o);
+ return -1;
+ }
+ }
+
+ pa_operation_unref(o);
+
+ if (p->dead && rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return p->dead ? -1 : 0;
+}
+
+static void latency_complete(pa_stream *s, const pa_latency_info *l, void *userdata) {
+ pa_simple *p = userdata;
+ assert(s && p);
+
+ if (!l)
+ p->dead = 1;
+ else {
+ int negative = 0;
+ p->latency = pa_stream_get_latency(s, l, &negative);
+ if (negative)
+ p->latency = 0;
+ }
+}
+
+pa_usec_t pa_simple_get_playback_latency(pa_simple *p, int *rerror) {
+ pa_operation *o;
+ assert(p && p->direction == PA_STREAM_PLAYBACK);
+
+ if (p->dead) {
+ if (rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return (pa_usec_t) -1;
+ }
+
+ p->latency = 0;
+ o = pa_stream_get_latency_info(p->stream, latency_complete, p);
+
+ while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
+
+ if (iterate(p, 1, rerror) < 0) {
+ pa_operation_cancel(o);
+ pa_operation_unref(o);
+ return -1;
+ }
+ }
+
+ pa_operation_unref(o);
+
+ if (p->dead && rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return p->dead ? (pa_usec_t) -1 : p->latency;
+}
+
+int pa_simple_flush(pa_simple *p, int *rerror) {
+ pa_operation *o;
+ assert(p && p->direction == PA_STREAM_PLAYBACK);
+
+ if (p->dead) {
+ if (rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return -1;
+ }
+
+ o = pa_stream_flush(p->stream, drain_or_flush_complete, p);
+
+ while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
+ if (iterate(p, 1, rerror) < 0) {
+ pa_operation_cancel(o);
+ pa_operation_unref(o);
+ return -1;
+ }
+ }
+
+ pa_operation_unref(o);
+
+ if (p->dead && rerror)
+ *rerror = pa_context_errno(p->context);
+
+ return p->dead ? -1 : 0;
+}
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