code.delx.au - pulseaudio/blob - src/pulsecore/play-memblockq.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 #include <pulse/xmalloc.h>
  33 #include <pulse/gccmacro.h>
  34
  35 #include <pulsecore/sink-input.h>
  36 #include <pulsecore/thread-mq.h>
  37 #include <pulsecore/sample-util.h>
  38
  39 #include "play-memblockq.h"
  40
  41 typedef struct memblockq_stream {
  42     pa_msgobject parent;
  43     pa_core *core;
  44     pa_sink_input *sink_input;
  45     pa_memblockq *memblockq;
  46 } memblockq_stream;
  47
  48 enum {
  49     MEMBLOCKQ_STREAM_MESSAGE_UNLINK,
  50 };
  51
  52 PA_DECLARE_CLASS(memblockq_stream);
  53 #define MEMBLOCKQ_STREAM(o) (memblockq_stream_cast(o))
  54 static PA_DEFINE_CHECK_TYPE(memblockq_stream, pa_msgobject);
  55
  56 static void memblockq_stream_unlink(memblockq_stream *u) {
  57     pa_assert(u);
  58
  59     if (!u->sink_input)
  60         return;
  61
  62     pa_sink_input_unlink(u->sink_input);
  63     pa_sink_input_unref(u->sink_input);
  64     u->sink_input = NULL;
  65
  66     memblockq_stream_unref(u);
  67 }
  68
  69 static void memblockq_stream_free(pa_object *o) {
  70     memblockq_stream *u = MEMBLOCKQ_STREAM(o);
  71     pa_assert(u);
  72
  73     if (u->memblockq)
  74         pa_memblockq_free(u->memblockq);
  75
  76     pa_xfree(u);
  77 }
  78
  79 static int memblockq_stream_process_msg(pa_msgobject *o, int code, void*userdata, int64_t offset, pa_memchunk *chunk) {
  80     memblockq_stream *u = MEMBLOCKQ_STREAM(o);
  81     memblockq_stream_assert_ref(u);
  82
  83     switch (code) {
  84         case MEMBLOCKQ_STREAM_MESSAGE_UNLINK:
  85             memblockq_stream_unlink(u);
  86             break;
  87     }
  88
  89     return 0;
  90 }
  91
  92 static void sink_input_kill_cb(pa_sink_input *i) {
  93     memblockq_stream *u;
  94
  95     pa_sink_input_assert_ref(i);
  96     u = MEMBLOCKQ_STREAM(i->userdata);
  97     memblockq_stream_assert_ref(u);
  98
  99     memblockq_stream_unlink(u);
 100 }
 101
 102 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 103     memblockq_stream *u;
 104
 105     pa_sink_input_assert_ref(i);
 106     pa_assert(chunk);
 107     u = MEMBLOCKQ_STREAM(i->userdata);
 108     memblockq_stream_assert_ref(u);
 109
 110     if (!u->memblockq)
 111         return -1;
 112
 113     if (pa_memblockq_peek(u->memblockq, chunk) < 0) {
 114
 115         if (pa_sink_input_safe_to_remove(i)) {
 116
 117             pa_memblockq_free(u->memblockq);
 118             u->memblockq = NULL;
 119             pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(u), MEMBLOCKQ_STREAM_MESSAGE_UNLINK, NULL, 0, NULL, NULL);
 120         }
 121
 122         return -1;
 123     }
 124
 125     pa_memblockq_drop(u->memblockq, chunk->length);
 126
 127     return 0;
 128 }
 129
 130 static void sink_input_rewind_cb(pa_sink_input *i, size_t nbytes) {
 131     memblockq_stream *u;
 132
 133     pa_sink_input_assert_ref(i);
 134     pa_assert(nbytes > 0);
 135     u = MEMBLOCKQ_STREAM(i->userdata);
 136     memblockq_stream_assert_ref(u);
 137
 138     if (!u->memblockq)
 139         return;
 140
 141     pa_memblockq_rewind(u->memblockq, nbytes);
 142 }
 143
 144 static void sink_input_set_max_rewind(pa_sink_input *i, size_t nbytes) {
 145     memblockq_stream *u;
 146
 147     pa_sink_input_assert_ref(i);
 148     u = MEMBLOCKQ_STREAM(i->userdata);
 149     memblockq_stream_assert_ref(u);
 150
 151     if (!u->memblockq)
 152         return;
 153
 154     pa_memblockq_set_maxrewind(u->memblockq, nbytes);
 155 }
 156
 157 pa_sink_input* pa_memblockq_sink_input_new(
 158         pa_sink *sink,
 159         const pa_sample_spec *ss,
 160         const pa_channel_map *map,
 161         pa_memblockq *q,
 162         pa_cvolume *volume,
 163         pa_proplist *p) {
 164
 165     memblockq_stream *u = NULL;
 166     pa_sink_input_new_data data;
 167
 168     pa_assert(sink);
 169     pa_assert(ss);
 170
 171     /* We allow creating this stream with no q set, so that it can be
 172      * filled in later */
 173
 174     u = pa_msgobject_new(memblockq_stream);
 175     u->parent.parent.free = memblockq_stream_free;
 176     u->parent.process_msg = memblockq_stream_process_msg;
 177     u->core = sink->core;
 178     u->sink_input = NULL;
 179     u->memblockq = NULL;
 180
 181     pa_sink_input_new_data_init(&data);
 182     data.sink = sink;
 183     data.driver = __FILE__;
 184     pa_sink_input_new_data_set_sample_spec(&data, ss);
 185     pa_sink_input_new_data_set_channel_map(&data, map);
 186     pa_sink_input_new_data_set_volume(&data, volume);
 187     pa_proplist_update(data.proplist, PA_UPDATE_REPLACE, p);
 188
 189     u->sink_input = pa_sink_input_new(sink->core, &data, 0);
 190     pa_sink_input_new_data_done(&data);
 191
 192     if (!u->sink_input)
 193         goto fail;
 194
 195     u->sink_input->pop = sink_input_pop_cb;
 196     u->sink_input->rewind = sink_input_rewind_cb;
 197     u->sink_input->set_max_rewind = sink_input_set_max_rewind;
 198     u->sink_input->kill = sink_input_kill_cb;
 199     u->sink_input->userdata = u;
 200
 201     if (q)
 202         pa_memblockq_sink_input_set_queue(u->sink_input, q);
 203
 204     /* The reference to u is dangling here, because we want
 205      * to keep this stream around until it is fully played. */
 206
 207     /* This sink input is not "put" yet, i.e. pa_sink_input_put() has
 208      * not been called! */
 209
 210     return pa_sink_input_ref(u->sink_input);
 211
 212 fail:
 213     if (u)
 214         memblockq_stream_unref(u);
 215
 216     return NULL;
 217 }
 218
 219 int pa_play_memblockq(
 220         pa_sink *sink,
 221         const pa_sample_spec *ss,
 222         const pa_channel_map *map,
 223         pa_memblockq *q,
 224         pa_cvolume *volume,
 225         pa_proplist *p,
 226         uint32_t *sink_input_index) {
 227
 228     pa_sink_input *i;
 229
 230     pa_assert(sink);
 231     pa_assert(ss);
 232     pa_assert(q);
 233
 234     if (!(i = pa_memblockq_sink_input_new(sink, ss, map, q, volume, p)))
 235         return -1;
 236
 237     pa_sink_input_put(i);
 238
 239     if (sink_input_index)
 240         *sink_input_index = i->index;
 241
 242     pa_sink_input_unref(i);
 243
 244     return 0;
 245 }
 246
 247 void pa_memblockq_sink_input_set_queue(pa_sink_input *i, pa_memblockq *q) {
 248     memblockq_stream *u;
 249
 250     pa_sink_input_assert_ref(i);
 251     u = MEMBLOCKQ_STREAM(i->userdata);
 252     memblockq_stream_assert_ref(u);
 253
 254     if (u->memblockq)
 255         pa_memblockq_free(u->memblockq);
 256
 257     if ((u->memblockq = q)) {
 258         pa_memchunk silence;
 259
 260         pa_memblockq_set_prebuf(q, 0);
 261
 262         pa_sink_input_get_silence(i, &silence);
 263         pa_memblockq_set_silence(q, &silence);
 264         pa_memblock_unref(silence.memblock);
 265
 266         pa_memblockq_willneed(q);
 267     }
 268 }