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