ref: 67145058e417a1ecfcff723c3f78d9db66423678
dir: /src/sndfile.c/
/*
* libSoX libsndfile formats.
*
* Copyright 2007 Reuben Thomas <rrt@sc3d.org>
* Copyright 1999-2005 Erik de Castro Lopo <eridk@mega-nerd.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, write to the Free Software
* Foundation, Fifth Floor, 51 Franklin Street, Boston, MA 02111-1301,
* USA. */
#include "sox_i.h"
#ifdef HAVE_SNDFILE_H
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sndfile.h>
/* Private data for sndfile files */
typedef struct sndfile
{
SNDFILE *sf_file;
SF_INFO *sf_info;
} *sndfile_t;
assert_static(sizeof(struct sndfile) <= SOX_MAX_FILE_PRIVSIZE,
/* else */ sndfile_PRIVSIZE_too_big);
/* Get sample encoding and size from libsndfile subtype; return value
is encoding if conversion was made, or SOX_ENCODING_UNKNOWN for
invalid input. If the libsndfile subtype can't be represented in
SoX types, use 16-bit signed. */
static sox_encoding_t sox_encoding_and_size(int format, int *size)
{
*size = -1; /* Default */
format &= SF_FORMAT_SUBMASK;
switch (format) {
case SF_FORMAT_PCM_S8:
*size = SOX_SIZE_8BIT;
return SOX_ENCODING_SIGN2;
case SF_FORMAT_PCM_16:
*size = SOX_SIZE_16BIT;
return SOX_ENCODING_SIGN2;
case SF_FORMAT_PCM_24:
*size = SOX_SIZE_24BIT;
return SOX_ENCODING_SIGN2;
case SF_FORMAT_PCM_32:
*size = SOX_SIZE_32BIT;
return SOX_ENCODING_SIGN2;
case SF_FORMAT_PCM_U8:
*size = SOX_SIZE_8BIT;
return SOX_ENCODING_UNSIGNED;
case SF_FORMAT_FLOAT:
*size = SOX_SIZE_32BIT;
return SOX_ENCODING_FLOAT;
case SF_FORMAT_DOUBLE:
*size = SOX_SIZE_64BIT;
return SOX_ENCODING_FLOAT;
case SF_FORMAT_ULAW:
*size = SOX_SIZE_8BIT;
return SOX_ENCODING_ULAW;
case SF_FORMAT_ALAW:
*size = SOX_SIZE_8BIT;
return SOX_ENCODING_ALAW;
case SF_FORMAT_IMA_ADPCM:
return SOX_ENCODING_IMA_ADPCM;
case SF_FORMAT_MS_ADPCM:
return SOX_ENCODING_MS_ADPCM;
case SF_FORMAT_GSM610:
return SOX_ENCODING_GSM;
case SF_FORMAT_VOX_ADPCM:
return SOX_ENCODING_ADPCM;
/* For encodings we can't represent, have a sensible default */
case SF_FORMAT_G721_32:
case SF_FORMAT_G723_24:
case SF_FORMAT_G723_40:
case SF_FORMAT_DWVW_12:
case SF_FORMAT_DWVW_16:
case SF_FORMAT_DWVW_24:
case SF_FORMAT_DWVW_N:
case SF_FORMAT_DPCM_8:
case SF_FORMAT_DPCM_16:
return SOX_ENCODING_SIGN2;
default: /* Invalid libsndfile subtype */
return SOX_ENCODING_UNKNOWN;
}
assert(0); /* Should never reach here */
return SOX_ENCODING_UNKNOWN;
}
/*
* Open file in sndfile.
*/
static int startread(sox_format_t * ft)
{
sndfile_t sf = (sndfile_t)ft->priv;
sf->sf_info = (SF_INFO *)xcalloc(1, sizeof(SF_INFO));
/* We'd like to use sf_open_fd, but auto file typing has already
invoked stdio buffering. */
/* FIXME: If format parameters are set, assume file is raw. */
if ((sf->sf_file = sf_open(ft->filename, SFM_READ, sf->sf_info)) == NULL) {
sox_fail("sndfile cannot open file for reading: %s", sf_strerror(sf->sf_file));
free(sf->sf_file);
return SOX_EOF;
}
/* Copy format info */
ft->signal.rate = sf->sf_info->samplerate;
ft->signal.encoding = sox_encoding_and_size(sf->sf_info->format, &ft->signal.size);
ft->signal.channels = sf->sf_info->channels;
ft->length = sf->sf_info->frames * sf->sf_info->channels;
return SOX_SUCCESS;
}
/*
* Read up to len samples of type sox_sample_t from file into buf[].
* Return number of samples read.
*/
static sox_size_t read(sox_format_t * ft, sox_ssample_t *buf, sox_size_t len)
{
sndfile_t sf = (sndfile_t)ft->priv;
/* FIXME: We assume int == sox_sample_t here */
return (sox_size_t)sf_read_int(sf->sf_file, (int *)buf, (sf_count_t)len);
}
/*
* Close file for libsndfile (this doesn't close the file handle)
*/
static int stopread(sox_format_t * ft)
{
sndfile_t sf = (sndfile_t)ft->priv;
sf_close(sf->sf_file);
return SOX_SUCCESS;
}
static struct {
const char *ext;
unsigned len;
int format;
} format_map[] =
{
{ "aif", 3, SF_FORMAT_AIFF },
{ "wav", 0, SF_FORMAT_WAV },
{ "au", 0, SF_FORMAT_AU },
{ "snd", 0, SF_FORMAT_AU },
#ifdef HAVE_SNDFILE_1_0_12
{ "caf", 0, SF_FORMAT_CAF },
{ "flac", 0, SF_FORMAT_FLAC },
#endif
{ "svx", 0, SF_FORMAT_SVX },
{ "8svx", 0, SF_FORMAT_SVX },
{ "paf", 0, SF_ENDIAN_BIG | SF_FORMAT_PAF },
{ "fap", 0, SF_ENDIAN_LITTLE | SF_FORMAT_PAF },
{ "gsm", 0, SF_FORMAT_RAW | SF_FORMAT_GSM610 },
{ "nist", 0, SF_FORMAT_NIST },
{ "sph", 0, SF_FORMAT_NIST },
{ "ircam", 0, SF_FORMAT_IRCAM },
{ "sf", 0, SF_FORMAT_IRCAM },
{ "voc", 0, SF_FORMAT_VOC },
{ "w64", 0, SF_FORMAT_W64 },
{ "raw", 0, SF_FORMAT_RAW },
{ "mat4", 0, SF_FORMAT_MAT4 },
{ "mat5", 0, SF_FORMAT_MAT5 },
{ "mat", 0, SF_FORMAT_MAT4 },
{ "pvf", 0, SF_FORMAT_PVF },
{ "sds", 0, SF_FORMAT_SDS },
{ "sd2", 0, SF_FORMAT_SD2 },
{ "vox", 0, SF_FORMAT_RAW | SF_FORMAT_VOX_ADPCM },
{ "xi", 0, SF_FORMAT_XI }
};
/* Convert file name or type to libsndfile format */
static int name_to_format(const char *name)
{
int k;
#define FILE_TYPE_BUFLEN 15
char buffer[FILE_TYPE_BUFLEN + 1], *cptr;
if ((cptr = strrchr(name, '.')) != NULL) {
strncpy(buffer, cptr + 1, FILE_TYPE_BUFLEN);
buffer[FILE_TYPE_BUFLEN] = 0;
for (k = 0; buffer[k]; k++)
buffer[k] = tolower((buffer[k]));
} else
strncpy(buffer, name, FILE_TYPE_BUFLEN);
for (k = 0; k < (int)(sizeof(format_map) / sizeof(format_map [0])); k++) {
if (format_map[k].len > 0 && strncmp(name, format_map[k].ext, format_map[k].len) == 0)
return format_map[k].format;
else if (strcmp(buffer, format_map[k].ext) == 0)
return format_map[k].format;
}
return 0;
}
/* Make libsndfile subtype from sample encoding and size */
static int sndfile_format(sox_encoding_t encoding, int size)
{
if (encoding < SOX_ENCODING_SIZE_IS_WORD) {
switch (encoding) {
case SOX_ENCODING_ULAW:
return SF_FORMAT_ULAW;
case SOX_ENCODING_ALAW:
return SF_FORMAT_ALAW;
case SOX_ENCODING_ADPCM:
case SOX_ENCODING_MS_ADPCM:
return SF_FORMAT_MS_ADPCM;
case SOX_ENCODING_IMA_ADPCM:
return SF_FORMAT_IMA_ADPCM;
case SOX_ENCODING_OKI_ADPCM:
return SF_FORMAT_VOX_ADPCM;
default: /* Should be impossible */
return 0;
}
} else {
switch (encoding) {
case SOX_ENCODING_UNSIGNED:
if (size == SOX_SIZE_8BIT)
return SF_FORMAT_PCM_U8;
else
return 0;
case SOX_ENCODING_SIGN2:
case SOX_ENCODING_MP3:
case SOX_ENCODING_VORBIS:
#ifdef HAVE_SNDFILE_1_0_12
case SOX_ENCODING_FLAC:
switch (size) {
case SOX_SIZE_8BIT:
return SF_FORMAT_PCM_S8;
case SOX_SIZE_16BIT:
return SF_FORMAT_PCM_16;
case SOX_SIZE_24BIT:
return SF_FORMAT_PCM_24;
case SOX_SIZE_32BIT:
return SF_FORMAT_PCM_32;
default: /* invalid size */
return 0;
}
break;
#endif
case SOX_ENCODING_FLOAT:
return SF_FORMAT_FLOAT;
case SOX_ENCODING_GSM:
return SF_FORMAT_GSM610;
default: /* Bad encoding */
return 0;
}
}
}
static int startwrite(sox_format_t * ft)
{
sndfile_t sf = (sndfile_t)ft->priv;
int subtype = sndfile_format(ft->signal.encoding, ft->signal.size);
sf->sf_info = (SF_INFO *)xmalloc(sizeof(SF_INFO));
/* Copy format info */
if (strcmp(ft->filetype, "sndfile") == 0)
sf->sf_info->format = name_to_format(ft->filename) | subtype;
else
sf->sf_info->format = name_to_format(ft->filetype) | subtype;
sf->sf_info->samplerate = ft->signal.rate;
sf->sf_info->channels = ft->signal.channels;
sf->sf_info->frames = ft->length / ft->signal.channels;
/* If output format is invalid, try to find a sensible default */
if (!sf_format_check(sf->sf_info)) {
SF_FORMAT_INFO format_info;
int i, count;
sox_warn("cannot use desired output encoding, choosing default");
sf_command(sf->sf_file, SFC_GET_SIMPLE_FORMAT_COUNT, &count, sizeof(int));
for (i = 0; i < count; i++) {
format_info.format = i;
sf_command(sf->sf_file, SFC_GET_SIMPLE_FORMAT, &format_info, sizeof(format_info));
if ((format_info.format & SF_FORMAT_TYPEMASK) == (sf->sf_info->format & SF_FORMAT_TYPEMASK)) {
sf->sf_info->format = format_info.format;
/* FIXME: Print out exactly what we chose, needs sndfile ->
sox encoding conversion functions */
break;
}
}
if (!sf_format_check(sf->sf_info)) {
sox_fail("cannot find a usable output encoding");
return SOX_EOF;
}
}
if ((sf->sf_file = sf_open(ft->filename, SFM_WRITE, sf->sf_info)) == NULL) {
sox_fail("sndfile cannot open file for writing: %s", sf_strerror(sf->sf_file));
return SOX_EOF;
}
return SOX_SUCCESS;
}
/*
* Write len samples of type sox_sample_t from buf[] to file.
* Return number of samples written.
*/
static sox_size_t write(sox_format_t * ft, const sox_ssample_t *buf, sox_size_t len)
{
sndfile_t sf = (sndfile_t)ft->priv;
/* FIXME: We assume int == sox_sample_t here */
return (sox_size_t)sf_write_int(sf->sf_file, (int *)buf, (sf_count_t)len);
}
/*
* Close file for libsndfile (this doesn't close the file handle)
*/
static int stopwrite(sox_format_t * ft)
{
sndfile_t sf = (sndfile_t)ft->priv;
sf_close(sf->sf_file);
return SOX_SUCCESS;
}
static int seek(sox_format_t * ft, sox_size_t offset)
{
sndfile_t sf = (sndfile_t)ft->priv;
sf_seek(sf->sf_file, (sf_count_t)(offset / ft->signal.channels), SEEK_CUR);
return SOX_SUCCESS;
}
/* Format file suffixes */
/* For now, comment out formats built in to SoX */
static const char *names[] = {
"sndfile", /* special type to force use of sndfile */
/* "aif", */
/* "wav", */
/* "au", */
#ifdef HAVE_SNDFILE_1_0_12
"caf",
#endif
/* "flac", */
/* "snd", */
/* "svx", */
"paf",
"fap",
/* "gsm", */
/* "nist", */
/* "ircam", */
/* "sf", */
/* "voc", */
"w64",
/* "raw", */
"mat4",
"mat5",
"mat",
"pvf",
"sds",
"sd2",
/* "vox", */
"xi",
NULL
};
/* Format descriptor */
static sox_format_handler_t format = {
names,
SOX_FILE_SEEK | SOX_FILE_NOSTDIO,
startread,
read,
stopread,
startwrite,
write,
stopwrite,
seek
};
const sox_format_handler_t *sox_sndfile_format_fn(void);
const sox_format_handler_t *sox_sndfile_format_fn(void)
{
return &format;
}
#endif