4 This file is part of polypaudio.
6 polypaudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2 of the License,
9 or (at your option) any later version.
11 polypaudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with polypaudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
32 #include "polypaudio.h"
34 #include <polypcore/native-common.h>
35 #include <polypcore/xmalloc.h>
36 #include <polypcore/log.h>
39 pa_mainloop *mainloop;
42 pa_stream_direction_t direction;
47 size_t read_index, read_length;
51 static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata);
53 static int check_error(pa_simple *p, int *rerror) {
54 pa_context_state_t cst;
55 pa_stream_state_t sst;
58 if ((cst = pa_context_get_state(p->context)) == PA_CONTEXT_FAILED)
61 assert(cst != PA_CONTEXT_TERMINATED);
64 if ((sst = pa_stream_get_state(p->stream)) == PA_STREAM_FAILED)
67 assert(sst != PA_STREAM_TERMINATED);
74 *rerror = pa_context_errno(p->context);
81 static int iterate(pa_simple *p, int block, int *rerror) {
82 assert(p && p->context && p->mainloop);
84 if (check_error(p, rerror) < 0)
87 if (!block && !pa_context_is_pending(p->context))
91 if (pa_mainloop_iterate(p->mainloop, 1, NULL) < 0) {
93 *rerror = PA_ERROR_INTERNAL;
97 if (check_error(p, rerror) < 0)
100 } while (pa_context_is_pending(p->context));
103 while (pa_mainloop_deferred_pending(p->mainloop)) {
105 if (pa_mainloop_iterate(p->mainloop, 0, NULL) < 0) {
107 *rerror = PA_ERROR_INTERNAL;
111 if (check_error(p, rerror) < 0)
118 pa_simple* pa_simple_new(
121 pa_stream_direction_t dir,
123 const char *stream_name,
124 const pa_sample_spec *ss,
125 const pa_buffer_attr *attr,
129 int error = PA_ERROR_INTERNAL;
130 assert(ss && (dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD));
132 p = pa_xmalloc(sizeof(pa_simple));
135 p->mainloop = pa_mainloop_new();
140 p->read_index = p->read_length = 0;
143 if (!(p->context = pa_context_new(pa_mainloop_get_api(p->mainloop), name)))
146 pa_context_connect(p->context, server, 1, NULL);
148 /* Wait until the context is ready */
149 while (pa_context_get_state(p->context) != PA_CONTEXT_READY) {
150 if (iterate(p, 1, &error) < 0)
154 if (!(p->stream = pa_stream_new(p->context, stream_name, ss, NULL)))
157 if (dir == PA_STREAM_PLAYBACK)
158 pa_stream_connect_playback(p->stream, dev, attr, 0, NULL);
160 pa_stream_connect_record(p->stream, dev, attr, 0);
162 /* Wait until the stream is ready */
163 while (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
164 if (iterate(p, 1, &error) < 0)
168 pa_stream_set_read_callback(p->stream, read_callback, p);
179 void pa_simple_free(pa_simple *s) {
182 pa_xfree(s->read_data);
185 pa_stream_unref(s->stream);
188 pa_context_unref(s->context);
191 pa_mainloop_free(s->mainloop);
196 int pa_simple_write(pa_simple *p, const void*data, size_t length, int *rerror) {
197 assert(p && data && p->direction == PA_STREAM_PLAYBACK);
201 *rerror = pa_context_errno(p->context);
209 while (!(l = pa_stream_writable_size(p->stream)))
210 if (iterate(p, 1, rerror) < 0)
216 pa_stream_write(p->stream, data, l, NULL, 0);
217 data = (const uint8_t*) data + l;
221 /* Make sure that no data is pending for write */
222 if (iterate(p, 0, rerror) < 0)
228 static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata) {
229 pa_simple *p = userdata;
230 assert(s && data && length && p);
233 pa_log(__FILE__": Buffer overflow, dropping incoming memory blocks.\n");
234 pa_xfree(p->read_data);
237 p->read_data = pa_xmemdup(data, p->read_length = length);
241 int pa_simple_read(pa_simple *p, void*data, size_t length, int *rerror) {
242 assert(p && data && p->direction == PA_STREAM_RECORD);
246 *rerror = pa_context_errno(p->context);
255 if (p->read_length <= l)
258 memcpy(data, (uint8_t*) p->read_data+p->read_index, l);
260 data = (uint8_t*) data + l;
266 if (!p->read_length) {
267 pa_xfree(p->read_data);
275 assert(!p->read_data);
278 if (iterate(p, 1, rerror) < 0)
285 static void drain_or_flush_complete(pa_stream *s, int success, void *userdata) {
286 pa_simple *p = userdata;
292 int pa_simple_drain(pa_simple *p, int *rerror) {
294 assert(p && p->direction == PA_STREAM_PLAYBACK);
298 *rerror = pa_context_errno(p->context);
303 o = pa_stream_drain(p->stream, drain_or_flush_complete, p);
305 while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
306 if (iterate(p, 1, rerror) < 0) {
307 pa_operation_cancel(o);
308 pa_operation_unref(o);
313 pa_operation_unref(o);
315 if (p->dead && rerror)
316 *rerror = pa_context_errno(p->context);
318 return p->dead ? -1 : 0;
321 static void latency_complete(pa_stream *s, const pa_latency_info *l, void *userdata) {
322 pa_simple *p = userdata;
329 p->latency = pa_stream_get_latency(s, l, &negative);
335 pa_usec_t pa_simple_get_playback_latency(pa_simple *p, int *rerror) {
337 assert(p && p->direction == PA_STREAM_PLAYBACK);
341 *rerror = pa_context_errno(p->context);
343 return (pa_usec_t) -1;
347 o = pa_stream_get_latency_info(p->stream, latency_complete, p);
349 while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
351 if (iterate(p, 1, rerror) < 0) {
352 pa_operation_cancel(o);
353 pa_operation_unref(o);
358 pa_operation_unref(o);
360 if (p->dead && rerror)
361 *rerror = pa_context_errno(p->context);
363 return p->dead ? (pa_usec_t) -1 : p->latency;
366 int pa_simple_flush(pa_simple *p, int *rerror) {
368 assert(p && p->direction == PA_STREAM_PLAYBACK);
372 *rerror = pa_context_errno(p->context);
377 o = pa_stream_flush(p->stream, drain_or_flush_complete, p);
379 while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) {
380 if (iterate(p, 1, rerror) < 0) {
381 pa_operation_cancel(o);
382 pa_operation_unref(o);
387 pa_operation_unref(o);
389 if (p->dead && rerror)
390 *rerror = pa_context_errno(p->context);
392 return p->dead ? -1 : 0;