code.delx.au - pulseaudio/blob - polyp/sound-file-stream.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU 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   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.
  15
  16   You should have received a copy of the GNU 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
  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 <sndfile.h>
  32
  33 #include "sound-file-stream.h"
  34 #include "sink-input.h"
  35 #include "xmalloc.h"
  36 #include "log.h"
  37
  38 #define BUF_SIZE (1024*10)
  39
  40 struct userdata {
  41     SNDFILE *sndfile;
  42     struct pa_sink_input *sink_input;
  43     struct pa_memchunk memchunk;
  44 };
  45
  46 static void free_userdata(struct userdata *u) {
  47     assert(u);
  48     if (u->sink_input)
  49         pa_sink_input_free(u->sink_input);
  50     if (u->memchunk.memblock)
  51         pa_memblock_unref(u->memchunk.memblock);
  52     if (u->sndfile)
  53         sf_close(u->sndfile);
  54
  55     pa_xfree(u);
  56 }
  57
  58 static void sink_input_kill(struct pa_sink_input *i) {
  59     assert(i && i->userdata);
  60     free_userdata(i->userdata);
  61 }
  62
  63 static void si_kill(struct pa_mainloop_api *m, void *i) {
  64     sink_input_kill(i);
  65 }
  66
  67 static int sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
  68     struct userdata *u;
  69     assert(i && chunk && i->userdata);
  70     u = i->userdata;
  71
  72     if (!u->memchunk.memblock) {
  73         uint32_t fs = pa_frame_size(&i->sample_spec);
  74         sf_count_t samples = BUF_SIZE/fs;
  75
  76         u->memchunk.memblock = pa_memblock_new(BUF_SIZE, i->sink->core->memblock_stat);
  77         u->memchunk.index = 0;
  78         samples = sf_readf_float(u->sndfile, u->memchunk.memblock->data, samples);
  79         u->memchunk.length = samples*fs;
  80
  81         if (!u->memchunk.length) {
  82             pa_memblock_unref(u->memchunk.memblock);
  83             u->memchunk.memblock = NULL;
  84             u->memchunk.index = u->memchunk.length = 0;
  85             pa_mainloop_api_once(i->sink->core->mainloop, si_kill, i);
  86             return -1;
  87         }
  88     }
  89
  90     *chunk = u->memchunk;
  91     pa_memblock_ref(chunk->memblock);
  92     assert(chunk->length);
  93     return 0;
  94 }
  95
  96 static void sink_input_drop(struct pa_sink_input *i, const struct pa_memchunk*chunk, size_t length) {
  97     struct userdata *u;
  98     assert(i && chunk && length && i->userdata);
  99     u = i->userdata;
 100
 101     assert(!memcmp(chunk, &u->memchunk, sizeof(chunk)));
 102     assert(length <= u->memchunk.length);
 103
 104     u->memchunk.index += length;
 105     u->memchunk.length -= length;
 106
 107     if (u->memchunk.length <= 0) {
 108         pa_memblock_unref(u->memchunk.memblock);
 109         u->memchunk.memblock = NULL;
 110         u->memchunk.index = u->memchunk.length = 0;
 111     }
 112 }
 113
 114 int pa_play_file(struct pa_sink *sink, const char *fname, pa_volume_t volume) {
 115     struct userdata *u = NULL;
 116     SF_INFO sfinfo;
 117     struct pa_sample_spec ss;
 118     assert(sink && fname);
 119
 120     if (volume <= 0)
 121         goto fail;
 122
 123     u = pa_xmalloc(sizeof(struct userdata));
 124     u->sink_input = NULL;
 125     u->memchunk.memblock = NULL;
 126     u->memchunk.index = u->memchunk.length = 0;
 127     u->sndfile = NULL;
 128
 129     memset(&sfinfo, 0, sizeof(sfinfo));
 130
 131     if (!(u->sndfile = sf_open(fname, SFM_READ, &sfinfo))) {
 132         pa_log(__FILE__": Failed to open file %s\n", fname);
 133         goto fail;
 134     }
 135
 136     ss.format = PA_SAMPLE_FLOAT32;
 137     ss.rate = sfinfo.samplerate;
 138     ss.channels = sfinfo.channels;
 139
 140     if (!pa_sample_spec_valid(&ss)) {
 141         pa_log(__FILE__": Unsupported sample format in file %s\n", fname);
 142         goto fail;
 143     }
 144
 145     if (!(u->sink_input = pa_sink_input_new(sink, fname, &ss)))
 146         goto fail;
 147
 148     u->sink_input->volume = volume;
 149     u->sink_input->peek = sink_input_peek;
 150     u->sink_input->drop = sink_input_drop;
 151     u->sink_input->kill = sink_input_kill;
 152     u->sink_input->userdata = u;
 153
 154     pa_sink_notify(sink);
 155
 156     return 0;
 157
 158 fail:
 159     if (u)
 160         free_userdata(u);
 161
 162     return -1;
 163 }