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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   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 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, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <assert.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include <pulse/xmalloc.h>
  32
  33 #include <pulsecore/sink-input.h>
  34 #include <pulsecore/gccmacro.h>
  35
  36 #include "play-memblockq.h"
  37
  38 static void sink_input_kill(pa_sink_input *i) {
  39     pa_memblockq *q;
  40     assert(i);
  41     assert(i->userdata);
  42
  43     q = i->userdata;
  44
  45     pa_sink_input_disconnect(i);
  46     pa_sink_input_unref(i);
  47
  48     pa_memblockq_free(q);
  49 }
  50
  51 static int sink_input_peek(pa_sink_input *i, pa_memchunk *chunk) {
  52     pa_memblockq *q;
  53     assert(i);
  54     assert(chunk);
  55     assert(i->userdata);
  56
  57     q = i->userdata;
  58
  59     return pa_memblockq_peek(q, chunk);
  60 }
  61
  62 static void si_kill(PA_GCC_UNUSED pa_mainloop_api *m, void *i) {
  63     sink_input_kill(i);
  64 }
  65
  66 static void sink_input_drop(pa_sink_input *i, const pa_memchunk*chunk, size_t length) {
  67     pa_memblockq *q;
  68
  69     assert(i);
  70     assert(length > 0);
  71     assert( i->userdata);
  72
  73     q = i->userdata;
  74
  75     pa_memblockq_drop(q, chunk, length);
  76
  77     if (pa_memblockq_get_length(q) <= 0)
  78         pa_mainloop_api_once(i->sink->core->mainloop, si_kill, i);
  79 }
  80
  81 int pa_play_memblockq(
  82         pa_sink *sink,
  83         const char *name,
  84         const pa_sample_spec *ss,
  85         const pa_channel_map *map,
  86         pa_memblockq *q,
  87         pa_cvolume *volume) {
  88
  89     pa_sink_input *si;
  90     pa_sink_input_new_data data;
  91
  92     assert(sink);
  93     assert(ss);
  94     assert(q);
  95
  96     if (pa_memblockq_get_length(q) <= 0) {
  97         pa_memblockq_free(q);
  98         return 0;
  99     }
 100
 101     if (volume && pa_cvolume_is_muted(volume)) {
 102         pa_memblockq_free(q);
 103         return 0;
 104     }
 105
 106     pa_sink_input_new_data_init(&data);
 107     data.sink = sink;
 108     data.name = name;
 109     data.driver = __FILE__;
 110     pa_sink_input_new_data_set_channel_map(&data, map);
 111     pa_sink_input_new_data_set_sample_spec(&data, ss);
 112     pa_sink_input_new_data_set_volume(&data, volume);
 113
 114     if (!(si = pa_sink_input_new(sink->core, &data, 0)))
 115         return -1;
 116
 117     si->peek = sink_input_peek;
 118     si->drop = sink_input_drop;
 119     si->kill = sink_input_kill;
 120
 121     si->userdata = q;
 122
 123     pa_sink_notify(si->sink);
 124
 125     return 0;
 126 }