code.delx.au - pulseaudio/blob - src/pulsecore/sound-file.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 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 <string.h>
  29 #include <assert.h>
  30
  31 #include <sndfile.h>
  32
  33 #include <pulse/sample.h>
  34 #include <pulsecore/log.h>
  35
  36 #include "sound-file.h"
  37 #include "core-scache.h"
  38
  39 int pa_sound_file_load(pa_mempool *pool, const char *fname, pa_sample_spec *ss, pa_channel_map *map, pa_memchunk *chunk) {
  40     SNDFILE*sf = NULL;
  41     SF_INFO sfinfo;
  42     int ret = -1;
  43     size_t l;
  44     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
  45     void *ptr = NULL;
  46
  47     assert(fname);
  48     assert(ss);
  49     assert(chunk);
  50
  51     chunk->memblock = NULL;
  52     chunk->index = chunk->length = 0;
  53
  54     memset(&sfinfo, 0, sizeof(sfinfo));
  55
  56     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
  57         pa_log("Failed to open file %s", fname);
  58         goto finish;
  59     }
  60
  61     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
  62         case SF_FORMAT_PCM_16:
  63         case SF_FORMAT_PCM_U8:
  64         case SF_FORMAT_PCM_S8:
  65             ss->format = PA_SAMPLE_S16NE;
  66             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
  67             break;
  68
  69         case SF_FORMAT_ULAW:
  70             ss->format = PA_SAMPLE_ULAW;
  71             break;
  72
  73         case SF_FORMAT_ALAW:
  74             ss->format = PA_SAMPLE_ALAW;
  75             break;
  76
  77         case SF_FORMAT_FLOAT:
  78         case SF_FORMAT_DOUBLE:
  79         default:
  80             ss->format = PA_SAMPLE_FLOAT32NE;
  81             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
  82             break;
  83     }
  84
  85     ss->rate = sfinfo.samplerate;
  86     ss->channels = sfinfo.channels;
  87
  88     if (!pa_sample_spec_valid(ss)) {
  89         pa_log("Unsupported sample format in file %s", fname);
  90         goto finish;
  91     }
  92
  93     if (map)
  94         pa_channel_map_init_auto(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
  95
  96     if ((l = pa_frame_size(ss)*sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
  97         pa_log("File too large");
  98         goto finish;
  99     }
 100
 101     chunk->memblock = pa_memblock_new(pool, l);
 102     assert(chunk->memblock);
 103     chunk->index = 0;
 104     chunk->length = l;
 105
 106     ptr = pa_memblock_acquire(chunk->memblock);
 107
 108     if ((readf_function && readf_function(sf, ptr, sfinfo.frames) != sfinfo.frames) ||
 109         (!readf_function && sf_read_raw(sf, ptr, l) != l)) {
 110         pa_log("Premature file end");
 111         goto finish;
 112     }
 113
 114     ret = 0;
 115
 116 finish:
 117
 118     if (sf)
 119         sf_close(sf);
 120
 121     if (ptr)
 122         pa_memblock_release(chunk->memblock);
 123
 124     if (ret != 0 && chunk->memblock)
 125         pa_memblock_unref(chunk->memblock);
 126
 127     return ret;
 128
 129 }
 130
 131 int pa_sound_file_too_big_to_cache(const char *fname) {
 132     SNDFILE*sf = NULL;
 133     SF_INFO sfinfo;
 134     pa_sample_spec ss;
 135
 136     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
 137         pa_log("Failed to open file %s", fname);
 138         return 0;
 139     }
 140
 141     sf_close(sf);
 142
 143     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
 144         case SF_FORMAT_PCM_16:
 145         case SF_FORMAT_PCM_U8:
 146         case SF_FORMAT_PCM_S8:
 147             ss.format = PA_SAMPLE_S16NE;
 148             break;
 149
 150         case SF_FORMAT_ULAW:
 151             ss.format = PA_SAMPLE_ULAW;
 152             break;
 153
 154         case SF_FORMAT_ALAW:
 155             ss.format = PA_SAMPLE_ALAW;
 156             break;
 157
 158         case SF_FORMAT_DOUBLE:
 159         case SF_FORMAT_FLOAT:
 160         default:
 161             ss.format = PA_SAMPLE_FLOAT32NE;
 162             break;
 163     }
 164
 165     ss.rate = sfinfo.samplerate;
 166     ss.channels = sfinfo.channels;
 167
 168     if ((pa_frame_size(&ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 169         pa_log("File too large %s", fname);
 170         return 1;
 171     }
 172
 173     return 0;
 174 }