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
  39 #include "sound-file.h"
  40 #include "core-scache.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
  49     SNDFILE *sf = NULL;
  50     SF_INFO sfinfo;
  51     int ret = -1;
  52     size_t l;
  53     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
  54     void *ptr = NULL;
  55     int fd;
  56
  57     pa_assert(fname);
  58     pa_assert(ss);
  59     pa_assert(chunk);
  60
  61     pa_memchunk_reset(chunk);
  62     memset(&sfinfo, 0, sizeof(sfinfo));
  63
  64     if ((fd = open(fname, O_RDONLY
  65 #ifdef O_NOCTTY
  66                    |O_NOCTTY
  67 #endif
  68                    )) < 0) {
  69         pa_log("Failed to open file %s: %s", fname, pa_cstrerror(errno));
  70         goto finish;
  71     }
  72
  73 #ifdef HAVE_POSIX_FADVISE
  74     if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL) < 0) {
  75         pa_log_warn("POSIX_FADV_SEQUENTIAL failed: %s", pa_cstrerror(errno));
  76         goto finish;
  77     } else
  78         pa_log_debug("POSIX_FADV_SEQUENTIAL succeeded.");
  79 #endif
  80
  81     if (!(sf = sf_open_fd(fd, SFM_READ, &sfinfo, 1))) {
  82         pa_log("Failed to open file %s", fname);
  83         pa_close(fd);
  84         goto finish;
  85     }
  86
  87     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
  88         case SF_FORMAT_PCM_16:
  89         case SF_FORMAT_PCM_U8:
  90         case SF_FORMAT_PCM_S8:
  91             ss->format = PA_SAMPLE_S16NE;
  92             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *_ptr, sf_count_t frames)) sf_readf_short;
  93             break;
  94
  95         case SF_FORMAT_ULAW:
  96             ss->format = PA_SAMPLE_ULAW;
  97             break;
  98
  99         case SF_FORMAT_ALAW:
 100             ss->format = PA_SAMPLE_ALAW;
 101             break;
 102
 103         case SF_FORMAT_FLOAT:
 104         case SF_FORMAT_DOUBLE:
 105         default:
 106             ss->format = PA_SAMPLE_FLOAT32NE;
 107             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *_ptr, sf_count_t frames)) sf_readf_float;
 108             break;
 109     }
 110
 111     ss->rate = (uint32_t) sfinfo.samplerate;
 112     ss->channels = (uint8_t) sfinfo.channels;
 113
 114     if (!pa_sample_spec_valid(ss)) {
 115         pa_log("Unsupported sample format in file %s", fname);
 116         goto finish;
 117     }
 118
 119     if (map)
 120         pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
 121
 122     if ((l = pa_frame_size(ss) * (size_t) sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 123         pa_log("File too large");
 124         goto finish;
 125     }
 126
 127     chunk->memblock = pa_memblock_new(pool, l);
 128     chunk->index = 0;
 129     chunk->length = l;
 130
 131     ptr = pa_memblock_acquire(chunk->memblock);
 132
 133     if ((readf_function && readf_function(sf, ptr, sfinfo.frames) != sfinfo.frames) ||
 134         (!readf_function && sf_read_raw(sf, ptr, (sf_count_t) l) != (sf_count_t) l)) {
 135         pa_log("Premature file end");
 136         goto finish;
 137     }
 138
 139     ret = 0;
 140
 141 finish:
 142
 143     if (sf)
 144         sf_close(sf);
 145
 146     if (ptr)
 147         pa_memblock_release(chunk->memblock);
 148
 149     if (ret != 0 && chunk->memblock)
 150         pa_memblock_unref(chunk->memblock);
 151
 152     return ret;
 153 }
 154
 155 int pa_sound_file_too_big_to_cache(const char *fname) {
 156
 157     SNDFILE*sf = NULL;
 158     SF_INFO sfinfo;
 159     pa_sample_spec ss;
 160
 161     pa_assert(fname);
 162
 163     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
 164         pa_log("Failed to open file %s", fname);
 165         return -1;
 166     }
 167
 168     sf_close(sf);
 169
 170     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
 171         case SF_FORMAT_PCM_16:
 172         case SF_FORMAT_PCM_U8:
 173         case SF_FORMAT_PCM_S8:
 174             ss.format = PA_SAMPLE_S16NE;
 175             break;
 176
 177         case SF_FORMAT_ULAW:
 178             ss.format = PA_SAMPLE_ULAW;
 179             break;
 180
 181         case SF_FORMAT_ALAW:
 182             ss.format = PA_SAMPLE_ALAW;
 183             break;
 184
 185         case SF_FORMAT_DOUBLE:
 186         case SF_FORMAT_FLOAT:
 187         default:
 188             ss.format = PA_SAMPLE_FLOAT32NE;
 189             break;
 190     }
 191
 192     ss.rate = (uint32_t) sfinfo.samplerate;
 193     ss.channels = (uint8_t) sfinfo.channels;
 194
 195     if (!pa_sample_spec_valid(&ss)) {
 196         pa_log("Unsupported sample format in file %s", fname);
 197         return -1;
 198     }
 199
 200     if ((pa_frame_size(&ss) * (size_t) sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 201         pa_log("File too large: %s", fname);
 202         return 1;
 203     }
 204
 205     return 0;
 206 }