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 <assert.h>
  30
  31 #include <sndfile.h>
  32
  33 #include <pulse/sample.h>
  34 #include <pulsecore/log.h>
  35
  36 #include "sound-file.h"
  37 #include "core-scache.h"
  38
  39 int pa_sound_file_load(pa_mempool *pool, const char *fname, pa_sample_spec *ss, pa_channel_map *map, pa_memchunk *chunk) {
  40     SNDFILE*sf = NULL;
  41     SF_INFO sfinfo;
  42     int ret = -1;
  43     size_t l;
  44     sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
  45     assert(fname && ss && chunk);
  46
  47     chunk->memblock = NULL;
  48     chunk->index = chunk->length = 0;
  49
  50     memset(&sfinfo, 0, sizeof(sfinfo));
  51
  52     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
  53         pa_log("Failed to open file %s", fname);
  54         goto finish;
  55     }
  56
  57     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
  58         case SF_FORMAT_PCM_16:
  59         case SF_FORMAT_PCM_U8:
  60         case SF_FORMAT_PCM_S8:
  61             ss->format = PA_SAMPLE_S16NE;
  62             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
  63             break;
  64
  65         case SF_FORMAT_ULAW:
  66             ss->format = PA_SAMPLE_ULAW;
  67             break;
  68
  69         case SF_FORMAT_ALAW:
  70             ss->format = PA_SAMPLE_ALAW;
  71             break;
  72
  73         case SF_FORMAT_FLOAT:
  74         case SF_FORMAT_DOUBLE:
  75         default:
  76             ss->format = PA_SAMPLE_FLOAT32NE;
  77             readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
  78             break;
  79     }
  80
  81     ss->rate = sfinfo.samplerate;
  82     ss->channels = sfinfo.channels;
  83
  84     if (!pa_sample_spec_valid(ss)) {
  85         pa_log("Unsupported sample format in file %s", fname);
  86         goto finish;
  87     }
  88
  89     if (map)
  90         pa_channel_map_init_auto(map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
  91
  92     if ((l = pa_frame_size(ss)*sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
  93         pa_log("File too large");
  94         goto finish;
  95     }
  96
  97     chunk->memblock = pa_memblock_new(pool, l);
  98     assert(chunk->memblock);
  99     chunk->index = 0;
 100     chunk->length = l;
 101
 102     if ((readf_function && readf_function(sf, chunk->memblock->data, sfinfo.frames) != sfinfo.frames) ||
 103         (!readf_function && sf_read_raw(sf, chunk->memblock->data, l) != l)) {
 104         pa_log("Premature file end");
 105         goto finish;
 106     }
 107
 108     ret = 0;
 109
 110 finish:
 111
 112     if (sf)
 113         sf_close(sf);
 114
 115     if (ret != 0 && chunk->memblock)
 116         pa_memblock_unref(chunk->memblock);
 117
 118     return ret;
 119
 120 }
 121
 122 int pa_sound_file_too_big_to_cache(const char *fname) {
 123     SNDFILE*sf = NULL;
 124     SF_INFO sfinfo;
 125     pa_sample_spec ss;
 126
 127     if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
 128         pa_log("Failed to open file %s", fname);
 129         return 0;
 130     }
 131
 132     sf_close(sf);
 133
 134     switch (sfinfo.format & SF_FORMAT_SUBMASK) {
 135         case SF_FORMAT_PCM_16:
 136         case SF_FORMAT_PCM_U8:
 137         case SF_FORMAT_PCM_S8:
 138             ss.format = PA_SAMPLE_S16NE;
 139             break;
 140
 141         case SF_FORMAT_ULAW:
 142             ss.format = PA_SAMPLE_ULAW;
 143             break;
 144
 145         case SF_FORMAT_ALAW:
 146             ss.format = PA_SAMPLE_ALAW;
 147             break;
 148
 149         case SF_FORMAT_DOUBLE:
 150         case SF_FORMAT_FLOAT:
 151         default:
 152             ss.format = PA_SAMPLE_FLOAT32NE;
 153             break;
 154     }
 155
 156     ss.rate = sfinfo.samplerate;
 157     ss.channels = sfinfo.channels;
 158
 159     if ((pa_frame_size(&ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
 160         pa_log("File too large %s", fname);
 161         return 1;
 162     }
 163
 164     return 0;
 165 }