code.delx.au - pulseaudio/blob - src/polypcore/sound-file.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 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   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 Lesser 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 <string.h>
  27 #include <assert.h>
  28
  29 #include <sndfile.h>
  30
  31 #include <polyp/sample.h>
  32 #include <polypcore/log.h>
  33
  34 #include "sound-file.h"
  35 #include "core-scache.h"
  36
  37 int pa_sound_file_load(const char *fname, pa_sample_spec *ss, pa_channel_map *map, pa_memchunk *chunk, pa_memblock_stat *s) {
  38     SNDFILE*sf = NULL;
  39     SF_INFO sfinfo;
  40     int ret = -1;
  41     size_t l;
  42     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
  43     assert(fname && ss && chunk);
  44
  45     chunk->memblock = NULL;
  46     chunk->index = chunk->length = 0;
  47
  48     memset(&sfinfo, 0, sizeof(sfinfo));
  49
  50     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
  51         pa_log(__FILE__": Failed to open file %s", fname);
  52         goto finish;
  53     }
  54
  55     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
  56         case SF_FORMAT_PCM_16:
  57         case SF_FORMAT_PCM_U8:
  58         case SF_FORMAT_PCM_S8:
  59             ss->format = PA_SAMPLE_S16NE;
  60             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
  61             break;
  62
  63         case SF_FORMAT_ULAW:
  64             ss->format = PA_SAMPLE_ULAW;
  65             break;
  66
  67         case SF_FORMAT_ALAW:
  68             ss->format = PA_SAMPLE_ALAW;
  69             break;
  70
  71         case SF_FORMAT_FLOAT:
  72         case SF_FORMAT_DOUBLE:
  73         default:
  74             ss->format = PA_SAMPLE_FLOAT32NE;
  75             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
  76             break;
  77     }
  78
  79     ss->rate = sfinfo.samplerate;
  80     ss->channels = sfinfo.channels;
  81
  82     if (!pa_sample_spec_valid(ss)) {
  83         pa_log(__FILE__": Unsupported sample format in file %s", fname);
  84         goto finish;
  85     }
  86
  87     if (map)
  88         pa_channel_map_init_auto(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
  89
  90     if ((l = pa_frame_size(ss)*sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
  91         pa_log(__FILE__": File too large");
  92         goto finish;
  93     }
  94
  95     chunk->memblock = pa_memblock_new(l, s);
  96     assert(chunk->memblock);
  97     chunk->index = 0;
  98     chunk->length = l;
  99
 100     if ((readf_function && readf_function(sf, chunk->memblock->data, sfinfo.frames) != sfinfo.frames) ||
 101         (!readf_function && sf_read_raw(sf, chunk->memblock->data, l) != l)) {
 102         pa_log(__FILE__": Premature file end");
 103         goto finish;
 104     }
 105
 106     ret = 0;
 107
 108 finish:
 109
 110     if (sf)
 111         sf_close(sf);
 112
 113     if (ret != 0 && chunk->memblock)
 114         pa_memblock_unref(chunk->memblock);
 115
 116     return ret;
 117
 118 }
 119
 120 int pa_sound_file_too_big_to_cache(const char *fname) {
 121     SNDFILE*sf = NULL;
 122     SF_INFO sfinfo;
 123     pa_sample_spec ss;
 124
 125     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
 126         pa_log(__FILE__": Failed to open file %s", fname);
 127         return 0;
 128     }
 129
 130     sf_close(sf);
 131
 132     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
 133         case SF_FORMAT_PCM_16:
 134         case SF_FORMAT_PCM_U8:
 135         case SF_FORMAT_PCM_S8:
 136             ss.format = PA_SAMPLE_S16NE;
 137             break;
 138
 139         case SF_FORMAT_ULAW:
 140             ss.format = PA_SAMPLE_ULAW;
 141             break;
 142
 143         case SF_FORMAT_ALAW:
 144             ss.format = PA_SAMPLE_ALAW;
 145             break;
 146
 147         case SF_FORMAT_DOUBLE:
 148         case SF_FORMAT_FLOAT:
 149         default:
 150             ss.format = PA_SAMPLE_FLOAT32NE;
 151             break;
 152     }
 153
 154     ss.rate = sfinfo.samplerate;
 155     ss.channels = sfinfo.channels;
 156
 157     if ((pa_frame_size(&ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 158         pa_log(__FILE__": File too large %s", fname);
 159         return 1;
 160     }
 161
 162     return 0;
 163 }