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     if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL) < 0) {
  71         pa_log_warn("POSIX_FADV_SEQUENTIAL failed: %s", pa_cstrerror(errno));
  72         goto finish;
  73     } else
  74         pa_log_debug("POSIX_FADV_SEQUENTIAL succeeded.");
  75
  76     if (!(sf = sf_open_fd(fd, SFM_READ, &sfinfo, 1))) {
  77         pa_log("Failed to open file %s", fname);
  78         close(fd);
  79         goto finish;
  80     }
  81
  82     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
  83         case SF_FORMAT_PCM_16:
  84         case SF_FORMAT_PCM_U8:
  85         case SF_FORMAT_PCM_S8:
  86             ss->format = PA_SAMPLE_S16NE;
  87             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
  88             break;
  89
  90         case SF_FORMAT_ULAW:
  91             ss->format = PA_SAMPLE_ULAW;
  92             break;
  93
  94         case SF_FORMAT_ALAW:
  95             ss->format = PA_SAMPLE_ALAW;
  96             break;
  97
  98         case SF_FORMAT_FLOAT:
  99         case SF_FORMAT_DOUBLE:
 100         default:
 101             ss->format = PA_SAMPLE_FLOAT32NE;
 102             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
 103             break;
 104     }
 105
 106     ss->rate = sfinfo.samplerate;
 107     ss->channels = sfinfo.channels;
 108
 109     if (!pa_sample_spec_valid(ss)) {
 110         pa_log("Unsupported sample format in file %s", fname);
 111         goto finish;
 112     }
 113
 114     if (map)
 115         pa_channel_map_init_auto(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
 116
 117     if ((l = pa_frame_size(ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 118         pa_log("File too large");
 119         goto finish;
 120     }
 121
 122     chunk->memblock = pa_memblock_new(pool, l);
 123     chunk->index = 0;
 124     chunk->length = l;
 125
 126     ptr = pa_memblock_acquire(chunk->memblock);
 127
 128     if ((readf_function && readf_function(sf, ptr, sfinfo.frames) != sfinfo.frames) ||
 129         (!readf_function && sf_read_raw(sf, ptr, l) != l)) {
 130         pa_log("Premature file end");
 131         goto finish;
 132     }
 133
 134     ret = 0;
 135
 136 finish:
 137
 138     if (sf)
 139         sf_close(sf);
 140
 141     if (ptr)
 142         pa_memblock_release(chunk->memblock);
 143
 144     if (ret != 0 && chunk->memblock)
 145         pa_memblock_unref(chunk->memblock);
 146
 147     return ret;
 148 }
 149
 150 int pa_sound_file_too_big_to_cache(const char *fname) {
 151
 152     SNDFILE*sf = NULL;
 153     SF_INFO sfinfo;
 154     pa_sample_spec ss;
 155
 156     pa_assert(fname);
 157
 158     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
 159         pa_log("Failed to open file %s", fname);
 160         return -1;
 161     }
 162
 163     sf_close(sf);
 164
 165     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
 166         case SF_FORMAT_PCM_16:
 167         case SF_FORMAT_PCM_U8:
 168         case SF_FORMAT_PCM_S8:
 169             ss.format = PA_SAMPLE_S16NE;
 170             break;
 171
 172         case SF_FORMAT_ULAW:
 173             ss.format = PA_SAMPLE_ULAW;
 174             break;
 175
 176         case SF_FORMAT_ALAW:
 177             ss.format = PA_SAMPLE_ALAW;
 178             break;
 179
 180         case SF_FORMAT_DOUBLE:
 181         case SF_FORMAT_FLOAT:
 182         default:
 183             ss.format = PA_SAMPLE_FLOAT32NE;
 184             break;
 185     }
 186
 187     ss.rate = sfinfo.samplerate;
 188     ss.channels = sfinfo.channels;
 189
 190     if (!pa_sample_spec_valid(&ss)) {
 191         pa_log("Unsupported sample format in file %s", fname);
 192         return -1;
 193     }
 194
 195     if ((pa_frame_size(&ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 196         pa_log("File too large: %s", fname);
 197         return 1;
 198     }
 199
 200     return 0;
 201 }