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 <unistd.h>
  27 #include <fcntl.h>
  28 #include <errno.h>
  29
  30 #include <sndfile.h>
  31
  32 #include <pulse/sample.h>
  33 #include <pulsecore/log.h>
  34 #include <pulsecore/macro.h>
  35 #include <pulsecore/core-error.h>
  36 #include <pulsecore/core-util.h>
  37 #include <pulsecore/core-scache.h>
  38 #include <pulsecore/sndfile-util.h>
  39
  40 #include "sound-file.h"
  41
  42 int pa_sound_file_load(
  43         pa_mempool *pool,
  44         const char *fname,
  45         pa_sample_spec *ss,
  46         pa_channel_map *map,
  47         pa_memchunk *chunk,
  48         pa_proplist *p) {
  49
  50     SNDFILE *sf = NULL;
  51     SF_INFO sfi;
  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
  64     if ((fd = pa_open_cloexec(fname, O_RDONLY, 0)) < 0) {
  65         pa_log("Failed to open file %s: %s", fname, pa_cstrerror(errno));
  66         goto finish;
  67     }
  68
  69 #ifdef HAVE_POSIX_FADVISE
  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 #endif
  76
  77     pa_zero(sfi);
  78     if (!(sf = sf_open_fd(fd, SFM_READ, &sfi, 1))) {
  79         pa_log("Failed to open file %s", fname);
  80         goto finish;
  81     }
  82
  83     fd = -1;
  84
  85     if (pa_sndfile_read_sample_spec(sf, ss) < 0) {
  86         pa_log("Failed to determine file sample format.");
  87         goto finish;
  88     }
  89
  90     if ((map && pa_sndfile_read_channel_map(sf, map) < 0)) {
  91         if (ss->channels > 2)
  92             pa_log("Failed to determine file channel map, synthesizing one.");
  93         pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
  94     }
  95
  96     if (p)
  97         pa_sndfile_init_proplist(sf, p);
  98
  99     if ((l = pa_frame_size(ss) * (size_t) sfi.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 100         pa_log("File too large");
 101         goto finish;
 102     }
 103
 104     chunk->memblock = pa_memblock_new(pool, l);
 105     chunk->index = 0;
 106     chunk->length = l;
 107
 108     readf_function = pa_sndfile_readf_function(ss);
 109
 110     ptr = pa_memblock_acquire(chunk->memblock);
 111
 112     if ((readf_function && readf_function(sf, ptr, sfi.frames) != sfi.frames) ||
 113         (!readf_function && sf_read_raw(sf, ptr, (sf_count_t) l) != (sf_count_t) l)) {
 114         pa_log("Premature file end");
 115         goto finish;
 116     }
 117
 118     ret = 0;
 119
 120 finish:
 121
 122     if (sf)
 123         sf_close(sf);
 124
 125     if (ptr)
 126         pa_memblock_release(chunk->memblock);
 127
 128     if (ret != 0 && chunk->memblock)
 129         pa_memblock_unref(chunk->memblock);
 130
 131     if (fd >= 0)
 132         pa_close(fd);
 133
 134     return ret;
 135 }
 136
 137 int pa_sound_file_too_big_to_cache(const char *fname) {
 138
 139     SNDFILE*sf = NULL;
 140     SF_INFO sfi;
 141     pa_sample_spec ss;
 142
 143     pa_assert(fname);
 144
 145     pa_zero(sfi);
 146     if (!(sf = sf_open(fname, SFM_READ, &sfi))) {
 147         pa_log("Failed to open file %s", fname);
 148         return -1;
 149     }
 150
 151     if (pa_sndfile_read_sample_spec(sf, &ss) < 0) {
 152         pa_log("Failed to determine file sample format.");
 153         sf_close(sf);
 154         return -1;
 155     }
 156
 157     sf_close(sf);
 158
 159     if ((pa_frame_size(&ss) * (size_t) sfi.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 160         pa_log("File too large: %s", fname);
 161         return 1;
 162     }
 163
 164     return 0;
 165 }