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Commit 4b279f76 authored by Josh Coalson's avatar Josh Coalson
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initial support for new --keep-foreign-metadata options, saving done, restoring TODO

parent be2434fd
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src/flac/Makefile.am
View file @ 4b279f76
......@@ -28,6 +28,7 @@ flac_SOURCES = \
analyze.c \
decode.c \
encode.c \
foreign_metadata.c \
main.c \
local_string_utils.c \
utils.c \
......@@ -35,6 +36,7 @@ flac_SOURCES = \
analyze.h \
decode.h \
encode.h \
foreign_metadata.h \
local_string_utils.h \
utils.h \
vorbiscomment.h
......
src/flac/Makefile.lite
View file @ 4b279f76
......@@ -36,6 +36,7 @@ SRCS_C = \
analyze.c \
decode.c \
encode.c \
foreign_metadata.c \
local_string_utils.c \
main.c \
utils.c \
......
src/flac/decode.c
View file @ 4b279f76
......@@ -45,6 +45,8 @@
typedef struct {
#if FLAC__HAS_OGG
FLAC__bool is_ogg;
FLAC__bool use_first_serial_number;
long serial_number;
#endif
FLAC__bool is_aiff_out;
......@@ -94,6 +96,8 @@ typedef struct {
FLAC__StreamDecoder *decoder;
FILE *fout;
foreign_metadata_t *foreign_metadata; /* NULL unless --keep-foreign-metadata requested */
} DecoderSession;
......@@ -103,9 +107,9 @@ static FLAC__bool is_big_endian_host_;
/*
* local routines
*/
static FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool treat_warnings_as_errors, FLAC__bool continue_through_decode_errors, FLAC__bool channel_map_none, replaygain_synthesis_spec_t replaygain_synthesis_spec, FLAC__bool analysis_mode, analysis_options aopts, utils__SkipUntilSpecification *skip_specification, utils__SkipUntilSpecification *until_specification, utils__CueSpecification *cue_specification, const char *infilename, const char *outfilename);
static FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool use_first_serial_number, long serial_number, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool treat_warnings_as_errors, FLAC__bool continue_through_decode_errors, FLAC__bool channel_map_none, replaygain_synthesis_spec_t replaygain_synthesis_spec, FLAC__bool analysis_mode, analysis_options aopts, utils__SkipUntilSpecification *skip_specification, utils__SkipUntilSpecification *until_specification, utils__CueSpecification *cue_specification, foreign_metadata_t *foreign_metadata, const char *infilename, const char *outfilename);
static void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred);
static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, decode_options_t decode_options, const char *infilename);
static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, const char *infilename);
static FLAC__bool DecoderSession_process(DecoderSession *d);
static int DecoderSession_finish_ok(DecoderSession *d);
static int DecoderSession_finish_error(DecoderSession *d);
......@@ -137,8 +141,12 @@ int flac__decode_aiff(const char *infilename, const char *outfilename, FLAC__boo
&decoder_session,
#if FLAC__HAS_OGG
options.common.is_ogg,
options.common.use_first_serial_number,
options.common.serial_number,
#else
/*is_ogg=*/false,
/*use_first_serial_number=*/false,
/*serial_number=*/0,
#endif
/*is_aiff_out=*/true,
/*is_wave_out=*/false,
......@@ -151,13 +159,14 @@ int flac__decode_aiff(const char *infilename, const char *outfilename, FLAC__boo
&options.common.skip_specification,
&options.common.until_specification,
options.common.has_cue_specification? &options.common.cue_specification : 0,
options.foreign_metadata,
infilename,
outfilename
)
)
return 1;
if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
if(!DecoderSession_init_decoder(&decoder_session, infilename))
return DecoderSession_finish_error(&decoder_session);
if(!DecoderSession_process(&decoder_session))
......@@ -175,8 +184,12 @@ int flac__decode_wav(const char *infilename, const char *outfilename, FLAC__bool
&decoder_session,
#if FLAC__HAS_OGG
options.common.is_ogg,
options.common.use_first_serial_number,
options.common.serial_number,
#else
/*is_ogg=*/false,
/*use_first_serial_number=*/false,
/*serial_number=*/0,
#endif
/*is_aiff_out=*/false,
/*is_wave_out=*/true,
......@@ -189,13 +202,14 @@ int flac__decode_wav(const char *infilename, const char *outfilename, FLAC__bool
&options.common.skip_specification,
&options.common.until_specification,
options.common.has_cue_specification? &options.common.cue_specification : 0,
options.foreign_metadata,
infilename,
outfilename
)
)
return 1;
if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
if(!DecoderSession_init_decoder(&decoder_session, infilename))
return DecoderSession_finish_error(&decoder_session);
if(!DecoderSession_process(&decoder_session))
......@@ -216,8 +230,12 @@ int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool
&decoder_session,
#if FLAC__HAS_OGG
options.common.is_ogg,
options.common.use_first_serial_number,
options.common.serial_number,
#else
/*is_ogg=*/false,
/*use_first_serial_number=*/false,
/*serial_number=*/0,
#endif
/*is_aiff_out=*/false,
/*is_wave_out=*/false,
......@@ -230,13 +248,14 @@ int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool
&options.common.skip_specification,
&options.common.until_specification,
options.common.has_cue_specification? &options.common.cue_specification : 0,
/*foreign_metadata=*/NULL,
infilename,
outfilename
)
)
return 1;
if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
if(!DecoderSession_init_decoder(&decoder_session, infilename))
return DecoderSession_finish_error(&decoder_session);
if(!DecoderSession_process(&decoder_session))
......@@ -245,10 +264,12 @@ int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool
return DecoderSession_finish_ok(&decoder_session);
}
FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool treat_warnings_as_errors, FLAC__bool continue_through_decode_errors, FLAC__bool channel_map_none, replaygain_synthesis_spec_t replaygain_synthesis_spec, FLAC__bool analysis_mode, analysis_options aopts, utils__SkipUntilSpecification *skip_specification, utils__SkipUntilSpecification *until_specification, utils__CueSpecification *cue_specification, const char *infilename, const char *outfilename)
FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool use_first_serial_number, long serial_number, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool treat_warnings_as_errors, FLAC__bool continue_through_decode_errors, FLAC__bool channel_map_none, replaygain_synthesis_spec_t replaygain_synthesis_spec, FLAC__bool analysis_mode, analysis_options aopts, utils__SkipUntilSpecification *skip_specification, utils__SkipUntilSpecification *until_specification, utils__CueSpecification *cue_specification, foreign_metadata_t *foreign_metadata, const char *infilename, const char *outfilename)
{
#if FLAC__HAS_OGG
d->is_ogg = is_ogg;
d->use_first_serial_number = use_first_serial_number;
d->serial_number = serial_number;
#else
(void)is_ogg;
#endif
......@@ -294,6 +315,8 @@ FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__
d->fout = 0; /* initialized with an open file later if necessary */
d->foreign_metadata = foreign_metadata;
FLAC__ASSERT(!(d->test_only && d->analysis_mode));
if(!d->test_only) {
......@@ -324,13 +347,21 @@ void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred)
}
}
FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, decode_options_t decode_options, const char *infilename)
FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, const char *infilename)
{
FLAC__StreamDecoderInitStatus init_status;
FLAC__uint32 test = 1;
is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
if(decoder_session->foreign_metadata) {
const char *error;
if(!flac__foreign_metadata_read_from_flac(decoder_session->foreign_metadata, infilename, &error)) {
flac__utils_printf(stderr, 1, "%s: ERROR reading foreign metadata: %s\n", decoder_session->inbasefilename, error);
return false;
}
}
decoder_session->decoder = FLAC__stream_decoder_new();
if(0 == decoder_session->decoder) {
......@@ -346,8 +377,8 @@ FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, decode_o
#if FLAC__HAS_OGG
if(decoder_session->is_ogg) {
if(!decode_options.use_first_serial_number)
FLAC__stream_decoder_set_ogg_serial_number(decoder_session->decoder, decode_options.serial_number);
if(!decoder_session->use_first_serial_number)
FLAC__stream_decoder_set_ogg_serial_number(decoder_session->decoder, decoder_session->serial_number);
init_status = FLAC__stream_decoder_init_ogg_file(decoder_session->decoder, strcmp(infilename, "-")? infilename : 0, write_callback, metadata_callback, error_callback, /*client_data=*/decoder_session);
}
else
......
src/flac/decode.h
View file @ 4b279f76
......@@ -19,13 +19,15 @@
#ifndef flac__decode_h
#define flac__decode_h
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include "analyze.h"
#include "foreign_metadata.h"
#include "utils.h"
#include "share/replaygain_synthesis.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
typedef struct {
FLAC__bool apply;
......@@ -54,6 +56,7 @@ typedef struct {
/* used for AIFF also */
typedef struct {
decode_options_t common;
foreign_metadata_t *foreign_metadata; /* NULL unless --keep-foreign-metadata requested */
} wav_decode_options_t;
typedef struct {
......
src/flac/encode.c
View file @ 4b279f76
This diff is collapsed.
src/flac/encode.h
View file @ 4b279f76
......@@ -19,18 +19,14 @@
#ifndef flac__encode_h
#define flac__encode_h
/* needed because of off_t */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include "FLAC/metadata.h"
#include "foreign_metadata.h"
#include "utils.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
extern const int FLAC_ENCODE__DEFAULT_PADDING;
typedef enum {
......@@ -101,6 +97,7 @@ typedef struct {
typedef struct {
encode_options_t common;
foreign_metadata_t *foreign_metadata; /* NULL unless --keep-foreign-metadata requested */
} wav_encode_options_t;
typedef struct {
......
src/flac/foreign_metadata.c 0 → 100644
View file @ 4b279f76
/* flac - Command-line FLAC encoder/decoder
* Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#if defined _MSC_VER || defined __MINGW32__
#include <sys/types.h> /* for off_t */
#if _MSC_VER <= 1600 /* @@@ [2G limit] */
#define fseeko fseek
#define ftello ftell
#endif
#endif
#include <stdio.h> /* for FILE etc. */
#include <stdlib.h> /* for calloc() etc. */
#include <string.h> /* for memcmp() etc. */
#include "FLAC/assert.h"
#include "FLAC/metadata.h"
#include "foreign_metadata.h"
#ifdef min
#undef min
#endif
#define min(x,y) ((x)<(y)?(x):(y))
static const char *FLAC__FOREIGN_METADATA_APPLICATION_ID = "FFMB";/*@@@@@@ settle on an ID */
static FLAC__uint32 unpack32be_(const FLAC__byte *b)
{
return ((FLAC__uint32)b[0]<<24) + ((FLAC__uint32)b[1]<<16) + ((FLAC__uint32)b[2]<<8) + (FLAC__uint32)b[3];
}
static FLAC__uint32 unpack32le_(const FLAC__byte *b)
{
return (FLAC__uint32)b[0] + ((FLAC__uint32)b[1]<<8) + ((FLAC__uint32)b[2]<<16) + ((FLAC__uint32)b[3]<<24);
}
static FLAC__bool append_block_(foreign_metadata_t *fm, off_t offset, FLAC__uint32 size, const char **error)
{
foreign_block_t *fb = realloc(fm->blocks, sizeof(foreign_block_t) * (fm->num_blocks+1));
if(fb) {
fb[fm->num_blocks].offset = offset;
fb[fm->num_blocks].size = size;
fm->num_blocks++;
fm->blocks = fb;
return true;
}
if(error) *error = "out of memory";
return false;
}
static FLAC__bool read_from_aiff_(foreign_metadata_t *fm, FILE *f, const char **error)
{
FLAC__byte buffer[12];
off_t offset, eof_offset;
if((offset = ftello(f)) < 0) {
if(error) *error = "ftello() error (001)";
return false;
}
if(fread(buffer, 1, 12, f) < 12 || memcmp(buffer, "FORM", 4) || (memcmp(buffer+8, "AIFF", 4) && memcmp(buffer+8, "AIFC", 4))) {
if(error) *error = "unsupported FORM layout (002)";
return false;
}
if(!append_block_(fm, offset, 12, error))
return false;
eof_offset = 8 + unpack32be_(buffer+4);
while(!feof(f)) {
FLAC__uint32 size, ssnd_offset_size = 0;
if((offset = ftello(f)) < 0) {
if(error) *error = "ftello() error (003)";
return false;
}
if((size = fread(buffer, 1, 8, f)) < 8) {
if(size == 0 && feof(f))
break;
if(error) *error = "invalid AIFF file (004)";
return false;
}
size = unpack32be_(buffer+4);
/* check if pad byte needed */
if(size & 1)
size++;
if(!memcmp(buffer, "COMM", 4)) {
if(fm->format_block) {
if(error) *error = "invalid AIFF file: multiple \"COMM\" chunks (005)";
return false;
}
fm->format_block = fm->num_blocks;
}
else if(!memcmp(buffer, "SSND", 4)) {
if(fm->audio_block) {
if(error) *error = "invalid AIFF file: multiple \"SSND\" chunks (006)";
return false;
}
fm->audio_block = fm->num_blocks;
/* read #offset bytes */
if(fread(buffer+8, 1, 4, f) < 4) {
if(error) *error = "invalid AIFF file (007)";
return false;
}
ssnd_offset_size = unpack32be_(buffer+8);
if(fseeko(f, -4, SEEK_CUR) < 0) {
if(error) *error = "invalid AIFF file: seek error (008)";
return false;
}
}
if(!append_block_(fm, offset, 8 + (memcmp(buffer, "SSND", 4)? size : 8 + ssnd_offset_size), error))
return false;
fprintf(stderr,"@@@@@@ chunk=%c%c%c%c offset=%d size=%d\n",buffer[0],buffer[1],buffer[2],buffer[3],(int)offset,8+(int)size);
if(fseeko(f, size, SEEK_CUR) < 0) {
if(error) *error = "invalid AIFF file: seek error (009)";
return false;
}
}
if(eof_offset != ftello(f)) {
if(error) *error = "invalid AIFF file: unexpected EOF (010)";
return false;
}
if(!fm->format_block) {
if(error) *error = "invalid AIFF file: missing \"COMM\" chunk (011)";
return false;
}
if(!fm->audio_block) {
if(error) *error = "invalid AIFF file: missing \"SSND\" chunk (012)";
return false;
}
return true;
}
static FLAC__bool read_from_wave_(foreign_metadata_t *fm, FILE *f, const char **error)
{
FLAC__byte buffer[12];
off_t offset, eof_offset;
if((offset = ftello(f)) < 0) {
if(error) *error = "ftello() error (001)";
return false;
}
if(fread(buffer, 1, 12, f) < 12 || memcmp(buffer, "RIFF", 4) || memcmp(buffer+8, "WAVE", 4)) {
if(error) *error = "unsupported RIFF layout (002)";
return false;
}
if(!append_block_(fm, offset, 12, error))
return false;
eof_offset = 8 + unpack32le_(buffer+4);
fprintf(stderr,"@@@@@@ off=%d eof=%d\n",(int)offset,(int)eof_offset);
while(!feof(f)) {
FLAC__uint32 size;
if((offset = ftello(f)) < 0) {
if(error) *error = "ftello() error (003)";
return false;
}
if((size = fread(buffer, 1, 8, f)) < 8) {
if(size == 0 && feof(f))
break;
if(error) *error = "invalid WAVE file (004)";
return false;
}
size = unpack32le_(buffer+4);
/* check if pad byte needed */
if(size & 1)
size++;
if(!memcmp(buffer, "fmt ", 4)) {
if(fm->format_block) {
if(error) *error = "invalid WAVE file: multiple \"fmt \" chunks (005)";
return false;
}
fm->format_block = fm->num_blocks;
}
else if(!memcmp(buffer, "data", 4)) {
if(fm->audio_block) {
if(error) *error = "invalid WAVE file: multiple \"data\" chunks (006)";
return false;
}
fm->audio_block = fm->num_blocks;
}
if(!append_block_(fm, offset, 8 + (memcmp(buffer, "data", 4)? size : 0), error))
return false;
fprintf(stderr,"@@@@@@ chunk=%c%c%c%c offset=%d size=%d\n",buffer[0],buffer[1],buffer[2],buffer[3],(int)offset,8+(int)size);
if(fseeko(f, size, SEEK_CUR) < 0) {
if(error) *error = "invalid WAVE file: seek error (007)";
return false;
}
}
if(eof_offset != ftello(f)) {
if(error) *error = "invalid WAVE file: unexpected EOF (008)";
return false;
}
if(!fm->format_block) {
if(error) *error = "invalid WAVE file: missing \"fmt \" chunk (009)";
return false;
}
if(!fm->audio_block) {
if(error) *error = "invalid WAVE file: missing \"data\" chunk (010)";
return false;
}
return true;
}
static FLAC__bool write_to_flac_(foreign_metadata_t *fm, FILE *fin, FILE *fout, FLAC__Metadata_SimpleIterator *it, const char **error)
{
static FLAC__byte buffer[4096];
const unsigned ID_LEN = FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
size_t left, block_num = 0;
FLAC__ASSERT(sizeof(buffer) >= ID_LEN);
while(block_num < fm->num_blocks) {
/* find next matching padding block */
do {
/* even on the first chunk's loop there will be a skippable STREAMINFO block, on subsequent loops we are first moving past the PADDING we just used */
if(!FLAC__metadata_simple_iterator_next(it)) {
if(error) *error = "no matching PADDING block found (004)";
return false;
}
} while(FLAC__metadata_simple_iterator_get_block_type(it) != FLAC__METADATA_TYPE_PADDING);
if(FLAC__metadata_simple_iterator_get_block_length(it) != ID_LEN+fm->blocks[block_num].size) {
if(error) *error = "PADDING block with wrong size found (005)";
return false;
}
fprintf(stderr,"@@@@@@ flac offset = %d\n",(int)FLAC__metadata_simple_iterator_get_block_offset(it));
/* transfer chunk into APPLICATION block */
/* first set up the file pointers */
if(fseek(fin, fm->blocks[block_num].offset, SEEK_SET) < 0) {
if(error) *error = "seek failed in WAVE/AIFF file (006)";
return false;
}
if(fseek(fout, FLAC__metadata_simple_iterator_get_block_offset(it), SEEK_SET) < 0) {
if(error) *error = "seek failed in FLAC file (007)";
return false;
}
/* update the type */
buffer[0] = FLAC__METADATA_TYPE_APPLICATION;
if(FLAC__metadata_simple_iterator_is_last(it))
buffer[0] |= 0x80; /*MAGIC number*/
if(fwrite(buffer, 1, 1, fout) < 1) {
if(error) *error = "write failed in FLAC/AIFF file (008)";
return false;
}
/* length stays the same so skip over it */
if(fseek(fout, FLAC__STREAM_METADATA_LENGTH_LEN/8, SEEK_CUR) < 0) {
if(error) *error = "seek failed in FLAC file (009)";
return false;
}
/* write the APPLICATION ID */
memcpy(buffer, FLAC__FOREIGN_METADATA_APPLICATION_ID, ID_LEN);
if(fwrite(buffer, 1, ID_LEN, fout) < ID_LEN) {
if(error) *error = "write failed in FLAC/AIFF file (010)";
return false;
}
/* transfer the foreign metadata */
for(left = fm->blocks[block_num].size; left > 0; ) {
size_t need = min(sizeof(buffer), left);
if(fread(buffer, 1, need, fin) < need) {
if(error) *error = "read failed in WAVE/AIFF file (011)";
return false;
}
if(fwrite(buffer, 1, need, fout) < need) {
if(error) *error = "write failed in FLAC/AIFF file (012)";
return false;
}
left -= need;
}
block_num++;
}
return true;
}
foreign_metadata_t *flac__foreign_metadata_new(void)
{
return (foreign_metadata_t*)calloc(sizeof(foreign_metadata_t), 1);
}
void flac__foreign_metadata_delete(foreign_metadata_t *fm)
{
if(fm) {
if(fm->blocks)
free(fm->blocks);
free(fm);
}
}
FLAC__bool flac__foreign_metadata_read_from_aiff(foreign_metadata_t *fm, const char *filename, const char **error)
{
FLAC__bool ok;
FILE *f = fopen(filename, "rb");
if(!f) {
if(error) *error = "can't open AIFF file for reading (000)";
return false;
}
ok = read_from_aiff_(fm, f, error);
fclose(f);
return ok;
}
FLAC__bool flac__foreign_metadata_read_from_wave(foreign_metadata_t *fm, const char *filename, const char **error)
{
FLAC__bool ok;
FILE *f = fopen(filename, "rb");
if(!f) {
if(error) *error = "can't open WAVE file for reading (000)";
return false;
}
ok = read_from_wave_(fm, f, error);
fclose(f);
return ok;
}
FLAC__bool flac__foreign_metadata_write_to_flac(foreign_metadata_t *fm, const char *infilename, const char *outfilename, const char **error)
{
FLAC__bool ok;
FILE *fin, *fout;
FLAC__Metadata_SimpleIterator *it = FLAC__metadata_simple_iterator_new();
if(!it) {
if(error) *error = "out of memory (000)";
return false;
}
if(!FLAC__metadata_simple_iterator_init(it, outfilename, /*read_only=*/true, /*preserve_file_stats=*/false)) {
if(error) *error = "can't initialize iterator (001)";
FLAC__metadata_simple_iterator_delete(it);
return false;
}
if(0 == (fin = fopen(infilename, "rb"))) {
if(error) *error = "can't open WAVE/AIFF file for reading (002)";
FLAC__metadata_simple_iterator_delete(it);
return false;
}
if(0 == (fout = fopen(outfilename, "r+b"))) {
if(error) *error = "can't open FLAC file for updating (003)";
FLAC__metadata_simple_iterator_delete(it);
fclose(fin);
return false;
}
ok = write_to_flac_(fm, fin, fout, it, error);
FLAC__metadata_simple_iterator_delete(it);
fclose(fin);
fclose(fout);
return ok;
}
FLAC__bool flac__foreign_metadata_read_from_flac(foreign_metadata_t *fm, const char *filename, const char **error)
{
}
FLAC__bool flac__foreign_metadata_write_to_aiff(foreign_metadata_t *fm, const char *infilename, const char *outfilename, const char **error)