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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio 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 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio 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 PulseAudio; 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 <unistd.h>
  28 #include <fcntl.h>
  29 #include <errno.h>
  30
  31 #include <sndfile.h>
  32
  33 #include <pulse/sample.h>
  34 #include <pulsecore/log.h>
  35 #include <pulsecore/macro.h>
  36 #include <pulsecore/core-error.h>
  37 #include <pulsecore/core-util.h>
  38 #include <pulsecore/core-scache.h>
  39 #include <pulsecore/sndfile-util.h>
  40
  41 #include "sound-file.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         pa_proplist *p) {
  50
  51     SNDFILE *sf = NULL;
  52     SF_INFO sfi;
  53     int ret = -1;
  54     size_t l;
  55     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
  56     void *ptr = NULL;
  57     int fd;
  58
  59     pa_assert(fname);
  60     pa_assert(ss);
  61     pa_assert(chunk);
  62
  63     pa_memchunk_reset(chunk);
  64
  65     if ((fd = open(fname, O_RDONLY
  66 #ifdef O_NOCTTY
  67                    |O_NOCTTY
  68 #endif
  69                    )) < 0) {
  70         pa_log("Failed to open file %s: %s", fname, pa_cstrerror(errno));
  71         goto finish;
  72     }
  73
  74 #ifdef HAVE_POSIX_FADVISE
  75     if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL) < 0) {
  76         pa_log_warn("POSIX_FADV_SEQUENTIAL failed: %s", pa_cstrerror(errno));
  77         goto finish;
  78     } else
  79         pa_log_debug("POSIX_FADV_SEQUENTIAL succeeded.");
  80 #endif
  81
  82     pa_zero(sfi);
  83     if (!(sf = sf_open_fd(fd, SFM_READ, &sfi, 1))) {
  84         pa_log("Failed to open file %s", fname);
  85         goto finish;
  86     }
  87
  88     fd = -1;
  89
  90     if (pa_sndfile_read_sample_spec(sf, ss) < 0) {
  91         pa_log("Failed to determine file sample format.");
  92         goto finish;
  93     }
  94
  95     if ((map && pa_sndfile_read_channel_map(sf, map) < 0)) {
  96         if (ss->channels > 2)
  97             pa_log("Failed to determine file channel map, synthesizing one.");
  98         pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
  99     }
 100
 101     if (p)
 102         pa_sndfile_init_proplist(sf, p);
 103
 104     if ((l = pa_frame_size(ss) * (size_t) sfi.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 105         pa_log("File too large");
 106         goto finish;
 107     }
 108
 109     chunk->memblock = pa_memblock_new(pool, l);
 110     chunk->index = 0;
 111     chunk->length = l;
 112
 113     readf_function = pa_sndfile_readf_function(ss);
 114
 115     ptr = pa_memblock_acquire(chunk->memblock);
 116
 117     if ((readf_function && readf_function(sf, ptr, sfi.frames) != sfi.frames) ||
 118         (!readf_function && sf_read_raw(sf, ptr, (sf_count_t) l) != (sf_count_t) l)) {
 119         pa_log("Premature file end");
 120         goto finish;
 121     }
 122
 123     ret = 0;
 124
 125 finish:
 126
 127     if (sf)
 128         sf_close(sf);
 129
 130     if (ptr)
 131         pa_memblock_release(chunk->memblock);
 132
 133     if (ret != 0 && chunk->memblock)
 134         pa_memblock_unref(chunk->memblock);
 135
 136     if (fd >= 0)
 137         pa_close(fd);
 138
 139     return ret;
 140 }
 141
 142 int pa_sound_file_too_big_to_cache(const char *fname) {
 143
 144     SNDFILE*sf = NULL;
 145     SF_INFO sfi;
 146     pa_sample_spec ss;
 147
 148     pa_assert(fname);
 149
 150     pa_zero(sfi);
 151     if (!(sf = sf_open(fname, SFM_READ, &sfi))) {
 152         pa_log("Failed to open file %s", fname);
 153         return -1;
 154     }
 155
 156     if (pa_sndfile_read_sample_spec(sf, &ss) < 0) {
 157         pa_log("Failed to determine file sample format.");
 158         sf_close(sf);
 159         return -1;
 160     }
 161
 162     sf_close(sf);
 163
 164     if ((pa_frame_size(&ss) * (size_t) sfi.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 165         pa_log("File too large: %s", fname);
 166         return 1;
 167     }
 168
 169     return 0;
 170 }