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 <unistd.h>
  30 #include <fcntl.h>
  31 #include <errno.h>
  32
  33 #include <sndfile.h>
  34
  35 #include <pulse/sample.h>
  36 #include <pulsecore/log.h>
  37 #include <pulsecore/macro.h>
  38 #include <pulsecore/core-error.h>
  39
  40 #include "sound-file.h"
  41 #include "core-scache.h"
  42
  43 int pa_sound_file_load(
  44         pa_mempool *pool,
  45         const char *fname,
  46         pa_sample_spec *ss,
  47         pa_channel_map *map,
  48         pa_memchunk *chunk) {
  49
  50     SNDFILE *sf = NULL;
  51     SF_INFO sfinfo;
  52     int ret = -1;
  53     size_t l;
  54     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
  55     void *ptr = NULL;
  56     int fd;
  57
  58     pa_assert(fname);
  59     pa_assert(ss);
  60     pa_assert(chunk);
  61
  62     pa_memchunk_reset(chunk);
  63     memset(&sfinfo, 0, sizeof(sfinfo));
  64
  65     if ((fd = open(fname, O_RDONLY|O_NOCTTY)) < 0) {
  66         pa_log("Failed to open file %s: %s", fname, pa_cstrerror(errno));
  67         goto finish;
  68     }
  69
  70 #ifdef HAVE_POSIX_FADVISE
  71     if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL) < 0) {
  72         pa_log_warn("POSIX_FADV_SEQUENTIAL failed: %s", pa_cstrerror(errno));
  73         goto finish;
  74     } else
  75         pa_log_debug("POSIX_FADV_SEQUENTIAL succeeded.");
  76 #endif
  77
  78     if (!(sf = sf_open_fd(fd, SFM_READ, &sfinfo, 1))) {
  79         pa_log("Failed to open file %s", fname);
  80         close(fd);
  81         goto finish;
  82     }
  83
  84     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
  85         case SF_FORMAT_PCM_16:
  86         case SF_FORMAT_PCM_U8:
  87         case SF_FORMAT_PCM_S8:
  88             ss->format = PA_SAMPLE_S16NE;
  89             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
  90             break;
  91
  92         case SF_FORMAT_ULAW:
  93             ss->format = PA_SAMPLE_ULAW;
  94             break;
  95
  96         case SF_FORMAT_ALAW:
  97             ss->format = PA_SAMPLE_ALAW;
  98             break;
  99
 100         case SF_FORMAT_FLOAT:
 101         case SF_FORMAT_DOUBLE:
 102         default:
 103             ss->format = PA_SAMPLE_FLOAT32NE;
 104             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
 105             break;
 106     }
 107
 108     ss->rate = sfinfo.samplerate;
 109     ss->channels = sfinfo.channels;
 110
 111     if (!pa_sample_spec_valid(ss)) {
 112         pa_log("Unsupported sample format in file %s", fname);
 113         goto finish;
 114     }
 115
 116     if (map)
 117         pa_channel_map_init_auto(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
 118
 119     if ((l = pa_frame_size(ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 120         pa_log("File too large");
 121         goto finish;
 122     }
 123
 124     chunk->memblock = pa_memblock_new(pool, l);
 125     chunk->index = 0;
 126     chunk->length = l;
 127
 128     ptr = pa_memblock_acquire(chunk->memblock);
 129
 130     if ((readf_function && readf_function(sf, ptr, sfinfo.frames) != sfinfo.frames) ||
 131         (!readf_function && sf_read_raw(sf, ptr, l) != (sf_count_t) l)) {
 132         pa_log("Premature file end");
 133         goto finish;
 134     }
 135
 136     ret = 0;
 137
 138 finish:
 139
 140     if (sf)
 141         sf_close(sf);
 142
 143     if (ptr)
 144         pa_memblock_release(chunk->memblock);
 145
 146     if (ret != 0 && chunk->memblock)
 147         pa_memblock_unref(chunk->memblock);
 148
 149     return ret;
 150 }
 151
 152 int pa_sound_file_too_big_to_cache(const char *fname) {
 153
 154     SNDFILE*sf = NULL;
 155     SF_INFO sfinfo;
 156     pa_sample_spec ss;
 157
 158     pa_assert(fname);
 159
 160     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
 161         pa_log("Failed to open file %s", fname);
 162         return -1;
 163     }
 164
 165     sf_close(sf);
 166
 167     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
 168         case SF_FORMAT_PCM_16:
 169         case SF_FORMAT_PCM_U8:
 170         case SF_FORMAT_PCM_S8:
 171             ss.format = PA_SAMPLE_S16NE;
 172             break;
 173
 174         case SF_FORMAT_ULAW:
 175             ss.format = PA_SAMPLE_ULAW;
 176             break;
 177
 178         case SF_FORMAT_ALAW:
 179             ss.format = PA_SAMPLE_ALAW;
 180             break;
 181
 182         case SF_FORMAT_DOUBLE:
 183         case SF_FORMAT_FLOAT:
 184         default:
 185             ss.format = PA_SAMPLE_FLOAT32NE;
 186             break;
 187     }
 188
 189     ss.rate = sfinfo.samplerate;
 190     ss.channels = sfinfo.channels;
 191
 192     if (!pa_sample_spec_valid(&ss)) {
 193         pa_log("Unsupported sample format in file %s", fname);
 194         return -1;
 195     }
 196
 197     if ((pa_frame_size(&ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 198         pa_log("File too large: %s", fname);
 199         return 1;
 200     }
 201
 202     return 0;
 203 }