1 /***
2 This file is part of PulseAudio.
3
4 Copyright 2006-2008 Lennart Poettering
5
6 PulseAudio 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 2.1 of the License,
9 or (at your option) any later version.
10
11 PulseAudio 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.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <stdlib.h>
25 #include <stdio.h>
26
27 #include <pulse/xmalloc.h>
28
29 #include <pulsecore/sink-input.h>
30 #include <pulsecore/thread-mq.h>
31
32 #include "play-memblockq.h"
33
34 typedef struct memblockq_stream {
35 pa_msgobject parent;
36 pa_core *core;
37 pa_sink_input *sink_input;
38 pa_memblockq *memblockq;
39 } memblockq_stream;
40
41 enum {
42 MEMBLOCKQ_STREAM_MESSAGE_UNLINK,
43 };
44
45 PA_DEFINE_PRIVATE_CLASS(memblockq_stream, pa_msgobject);
46 #define MEMBLOCKQ_STREAM(o) (memblockq_stream_cast(o))
47
memblockq_stream_unlink(memblockq_stream * u)48 static void memblockq_stream_unlink(memblockq_stream *u) {
49 pa_assert(u);
50
51 if (!u->sink_input)
52 return;
53
54 pa_sink_input_unlink(u->sink_input);
55 pa_sink_input_unref(u->sink_input);
56 u->sink_input = NULL;
57
58 memblockq_stream_unref(u);
59 }
60
memblockq_stream_free(pa_object * o)61 static void memblockq_stream_free(pa_object *o) {
62 memblockq_stream *u = MEMBLOCKQ_STREAM(o);
63 pa_assert(u);
64
65 if (u->memblockq)
66 pa_memblockq_free(u->memblockq);
67
68 pa_xfree(u);
69 }
70
memblockq_stream_process_msg(pa_msgobject * o,int code,void * userdata,int64_t offset,pa_memchunk * chunk)71 static int memblockq_stream_process_msg(pa_msgobject *o, int code, void*userdata, int64_t offset, pa_memchunk *chunk) {
72 memblockq_stream *u = MEMBLOCKQ_STREAM(o);
73 memblockq_stream_assert_ref(u);
74
75 switch (code) {
76 case MEMBLOCKQ_STREAM_MESSAGE_UNLINK:
77 memblockq_stream_unlink(u);
78 break;
79 }
80
81 return 0;
82 }
83
sink_input_kill_cb(pa_sink_input * i)84 static void sink_input_kill_cb(pa_sink_input *i) {
85 memblockq_stream *u;
86
87 pa_sink_input_assert_ref(i);
88 u = MEMBLOCKQ_STREAM(i->userdata);
89 memblockq_stream_assert_ref(u);
90
91 memblockq_stream_unlink(u);
92 }
93
94 /* Called from IO thread context */
sink_input_state_change_cb(pa_sink_input * i,pa_sink_input_state_t state)95 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
96 memblockq_stream *u;
97
98 pa_sink_input_assert_ref(i);
99 u = MEMBLOCKQ_STREAM(i->userdata);
100 memblockq_stream_assert_ref(u);
101
102 /* If we are added for the first time, ask for a rewinding so that
103 * we are heard right-away. */
104 if (PA_SINK_INPUT_IS_LINKED(state) &&
105 i->thread_info.state == PA_SINK_INPUT_INIT && i->sink)
106 pa_sink_input_request_rewind(i, 0, false, true, true);
107 }
108
sink_input_pop_cb(pa_sink_input * i,size_t nbytes,pa_memchunk * chunk)109 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
110 memblockq_stream *u;
111
112 pa_sink_input_assert_ref(i);
113 pa_assert(chunk);
114 u = MEMBLOCKQ_STREAM(i->userdata);
115 memblockq_stream_assert_ref(u);
116
117 if (!u->memblockq)
118 return -1;
119
120 if (pa_memblockq_peek(u->memblockq, chunk) < 0) {
121
122 if (pa_sink_input_safe_to_remove(i)) {
123
124 pa_memblockq_free(u->memblockq);
125 u->memblockq = NULL;
126
127 pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(u), MEMBLOCKQ_STREAM_MESSAGE_UNLINK, NULL, 0, NULL, NULL);
128 }
129
130 return -1;
131 }
132
133 /* If there's no memblock, there's going to be data in the memblockq after
134 * a gap with length chunk->length. Drop the gap and peek the actual
135 * data. There should always be some data coming - hence the assert. The
136 * gap will occur if the memblockq is rewound beyond index 0.*/
137 if (!chunk->memblock) {
138 pa_memblockq_drop(u->memblockq, chunk->length);
139 pa_assert_se(pa_memblockq_peek(u->memblockq, chunk) >= 0);
140 }
141
142 chunk->length = PA_MIN(chunk->length, nbytes);
143 pa_memblockq_drop(u->memblockq, chunk->length);
144
145 return 0;
146 }
147
sink_input_process_rewind_cb(pa_sink_input * i,size_t nbytes)148 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
149 memblockq_stream *u;
150
151 pa_sink_input_assert_ref(i);
152 u = MEMBLOCKQ_STREAM(i->userdata);
153 memblockq_stream_assert_ref(u);
154
155 if (!u->memblockq)
156 return;
157
158 pa_memblockq_rewind(u->memblockq, nbytes);
159 }
160
sink_input_update_max_rewind_cb(pa_sink_input * i,size_t nbytes)161 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
162 memblockq_stream *u;
163
164 pa_sink_input_assert_ref(i);
165 u = MEMBLOCKQ_STREAM(i->userdata);
166 memblockq_stream_assert_ref(u);
167
168 if (!u->memblockq)
169 return;
170
171 pa_memblockq_set_maxrewind(u->memblockq, nbytes);
172 }
173
pa_memblockq_sink_input_new(pa_sink * sink,const pa_sample_spec * ss,const pa_channel_map * map,pa_memblockq * q,pa_cvolume * volume,pa_proplist * p,pa_sink_input_flags_t flags)174 pa_sink_input* pa_memblockq_sink_input_new(
175 pa_sink *sink,
176 const pa_sample_spec *ss,
177 const pa_channel_map *map,
178 pa_memblockq *q,
179 pa_cvolume *volume,
180 pa_proplist *p,
181 pa_sink_input_flags_t flags) {
182
183 memblockq_stream *u = NULL;
184 pa_sink_input_new_data data;
185
186 pa_assert(sink);
187 pa_assert(ss);
188
189 /* We allow creating this stream with no q set, so that it can be
190 * filled in later */
191
192 u = pa_msgobject_new(memblockq_stream);
193 u->parent.parent.free = memblockq_stream_free;
194 u->parent.process_msg = memblockq_stream_process_msg;
195 u->core = sink->core;
196 u->sink_input = NULL;
197 u->memblockq = NULL;
198
199 pa_sink_input_new_data_init(&data);
200 pa_sink_input_new_data_set_sink(&data, sink, false, true);
201 data.driver = __FILE__;
202 pa_sink_input_new_data_set_sample_spec(&data, ss);
203 pa_sink_input_new_data_set_channel_map(&data, map);
204 pa_sink_input_new_data_set_volume(&data, volume);
205 pa_proplist_update(data.proplist, PA_UPDATE_REPLACE, p);
206 data.flags |= flags;
207
208 pa_sink_input_new(&u->sink_input, sink->core, &data);
209 pa_sink_input_new_data_done(&data);
210
211 if (!u->sink_input)
212 goto fail;
213
214 u->sink_input->pop = sink_input_pop_cb;
215 u->sink_input->process_rewind = sink_input_process_rewind_cb;
216 u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
217 u->sink_input->kill = sink_input_kill_cb;
218 u->sink_input->state_change = sink_input_state_change_cb;
219 u->sink_input->userdata = u;
220
221 if (q)
222 pa_memblockq_sink_input_set_queue(u->sink_input, q);
223
224 /* The reference to u is dangling here, because we want
225 * to keep this stream around until it is fully played. */
226
227 /* This sink input is not "put" yet, i.e. pa_sink_input_put() has
228 * not been called! */
229
230 return pa_sink_input_ref(u->sink_input);
231
232 fail:
233 if (u)
234 memblockq_stream_unref(u);
235
236 return NULL;
237 }
238
pa_play_memblockq(pa_sink * sink,const pa_sample_spec * ss,const pa_channel_map * map,pa_memblockq * q,pa_cvolume * volume,pa_proplist * p,pa_sink_input_flags_t flags,uint32_t * sink_input_index)239 int pa_play_memblockq(
240 pa_sink *sink,
241 const pa_sample_spec *ss,
242 const pa_channel_map *map,
243 pa_memblockq *q,
244 pa_cvolume *volume,
245 pa_proplist *p,
246 pa_sink_input_flags_t flags,
247 uint32_t *sink_input_index) {
248
249 pa_sink_input *i;
250
251 pa_assert(sink);
252 pa_assert(ss);
253 pa_assert(q);
254
255 if (!(i = pa_memblockq_sink_input_new(sink, ss, map, q, volume, p, flags)))
256 return -1;
257
258 pa_sink_input_put(i);
259
260 if (sink_input_index)
261 *sink_input_index = i->index;
262
263 pa_sink_input_unref(i);
264
265 return 0;
266 }
267
pa_memblockq_sink_input_set_queue(pa_sink_input * i,pa_memblockq * q)268 void pa_memblockq_sink_input_set_queue(pa_sink_input *i, pa_memblockq *q) {
269 memblockq_stream *u;
270
271 pa_sink_input_assert_ref(i);
272 u = MEMBLOCKQ_STREAM(i->userdata);
273 memblockq_stream_assert_ref(u);
274
275 if (u->memblockq)
276 pa_memblockq_free(u->memblockq);
277
278 if ((u->memblockq = q)) {
279 pa_memblockq_set_prebuf(q, 0);
280 pa_memblockq_set_silence(q, NULL);
281 pa_memblockq_willneed(q);
282 }
283 }
284