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|
////////////////////////////////////////////////////////////////////////////
// **** WAVPACK **** //
// Hybrid Lossless Wavefile Compressor //
// Copyright (c) 1998 - 2024 David Bryant. //
// All Rights Reserved. //
// Distributed under the BSD Software License (see license.txt) //
////////////////////////////////////////////////////////////////////////////
// aiff.c
// This module is a helper to the WavPack command-line programs to support AIFF files
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <ctype.h>
#include <limits.h>
#include "wavpack.h"
#include "utils.h"
#include "md5.h"
#pragma pack(push,2)
typedef struct {
uint16_t numChannels;
uint32_t numSampleFrames;
uint16_t sampleSize;
uint16_t sampleRateExponent;
uint64_t sampleRateMantissa;
char compressionType [4];
char compressionName [512];
} CommonChunk;
#pragma pack(pop)
#define CommonChunkFormat "SLSSD"
typedef struct {
uint32_t offset;
uint32_t blockSize;
} SoundChunk;
#define SoundChunkFormat "LL"
extern int debug_logging_mode;
static double get_extended (uint16_t exponent, uint64_t mantissa)
{
double sign = (exponent & 0x8000) ? -1.0 : 1.0, value = (double) mantissa;
double scaler = pow (2.0, (exponent & 0x7fff) - 16446);
return value * scaler * sign;
}
int ParseAiffHeaderConfig (FILE *infile, char *infilename, char *fourcc, WavpackContext *wpc, WavpackConfig *config)
{
int common_chunks = 0, version_chunks = 0;
int64_t total_samples = 0, infilesize;
RiffChunkHeader aiff_chunk_header;
ChunkHeader chunk_header;
CommonChunk common_chunk;
SoundChunk sound_chunk;
uint32_t bcount;
CLEAR (common_chunk);
CLEAR (sound_chunk);
infilesize = DoGetFileSize (infile);
if (infilesize >= 4294967296LL && !(config->qmode & QMODE_IGNORE_LENGTH)) {
error_line ("can't handle .AIF files larger than 4 GB (non-standard)!");
return WAVPACK_SOFT_ERROR;
}
memcpy (&aiff_chunk_header, fourcc, 4);
if (!DoReadFile (infile, ((char *) &aiff_chunk_header) + 4, sizeof (RiffChunkHeader) - 4, &bcount) ||
bcount != sizeof (RiffChunkHeader) - 4 ||
(strncmp (aiff_chunk_header.formType, "AIFF", 4) && strncmp (aiff_chunk_header.formType, "AIFC", 4))) {
error_line ("%s is not a valid .AIF file!", infilename);
return WAVPACK_SOFT_ERROR;
}
else if (!(config->qmode & QMODE_NO_STORE_WRAPPER) &&
!WavpackAddWrapper (wpc, &aiff_chunk_header, sizeof (RiffChunkHeader))) {
error_line ("%s", WavpackGetErrorMessage (wpc));
return WAVPACK_SOFT_ERROR;
}
if (debug_logging_mode) {
WavpackBigEndianToNative (&aiff_chunk_header, ChunkHeaderFormat);
error_line ("file size = %llu, chunk size in AIF%c header = %u", (unsigned long long) infilesize,
aiff_chunk_header.formType [3], aiff_chunk_header.ckSize);
}
// loop through all elements of the AIFF header
// (until the sound chunck) and copy them to the output file
while (1) {
int padded_chunk_size;
if (!DoReadFile (infile, &chunk_header, sizeof (ChunkHeader), &bcount) ||
bcount != sizeof (ChunkHeader)) {
error_line ("%s is not a valid .AIF%c file!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
else if (!(config->qmode & QMODE_NO_STORE_WRAPPER) &&
!WavpackAddWrapper (wpc, &chunk_header, sizeof (ChunkHeader))) {
error_line ("%s", WavpackGetErrorMessage (wpc));
return WAVPACK_SOFT_ERROR;
}
WavpackBigEndianToNative (&chunk_header, ChunkHeaderFormat);
padded_chunk_size = (chunk_header.ckSize + 1) & ~1L;
if (!strncmp (chunk_header.ckID, "FVER", 4)) { // if it's the format version chunk, don't be too picky
uint32_t timestamp;
if (version_chunks++ || padded_chunk_size != sizeof (timestamp) ||
!DoReadFile (infile, ×tamp, padded_chunk_size, &bcount) ||
bcount != sizeof (timestamp)) {
error_line ("%s is not a valid .AIF%c file!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
else if (!(config->qmode & QMODE_NO_STORE_WRAPPER) &&
!WavpackAddWrapper (wpc, ×tamp, padded_chunk_size)) {
error_line ("%s", WavpackGetErrorMessage (wpc));
return WAVPACK_SOFT_ERROR;
}
// WavpackBigEndianToNative (×tamp, "L");
}
else if (!strncmp (chunk_header.ckID, "COMM", 4)) { // if it's the common chunk, we want to get some info out of there and
int supported = TRUE, floatData = FALSE; // make sure it's a .aiff file we can handle
double sampleRate;
if (common_chunks++ || padded_chunk_size < 18 || padded_chunk_size > sizeof (common_chunk) ||
(aiff_chunk_header.formType [3] == 'F' && padded_chunk_size != 18) ||
!DoReadFile (infile, &common_chunk, padded_chunk_size, &bcount) ||
bcount != padded_chunk_size) {
error_line ("%s is not a valid .AIF%c file!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
else if (!(config->qmode & QMODE_NO_STORE_WRAPPER) &&
!WavpackAddWrapper (wpc, &common_chunk, padded_chunk_size)) {
error_line ("%s", WavpackGetErrorMessage (wpc));
return WAVPACK_SOFT_ERROR;
}
WavpackBigEndianToNative (&common_chunk, CommonChunkFormat);
sampleRate = get_extended (common_chunk.sampleRateExponent, common_chunk.sampleRateMantissa);
if (debug_logging_mode) {
error_line ("common tag size = %d", chunk_header.ckSize);
error_line ("numChannels = %d, numSampleFrames = %u",
common_chunk.numChannels, common_chunk.numSampleFrames);
error_line ("sampleSize = %d, sampleRate = %g", common_chunk.sampleSize, sampleRate);
if (chunk_header.ckSize >= 22) {
error_line ("compressionType = %c%c%c%c",
common_chunk.compressionType [0],
common_chunk.compressionType [1],
common_chunk.compressionType [2],
common_chunk.compressionType [3]);
if (chunk_header.ckSize >= 24) {
int pstring_len = (unsigned char) common_chunk.compressionName [0];
if (pstring_len >= 1 && pstring_len <= (int)(chunk_header.ckSize - 23)) {
char compressionName [256];
int i, j;
for (j = i = 0; i < pstring_len; ++i)
if (common_chunk.compressionName [i + 1] >= ' ' && common_chunk.compressionName [i + 1] <= '~')
compressionName [j++] = common_chunk.compressionName [i + 1];
compressionName [j] = 0;
error_line ("compressionName = \"%s\"", compressionName);
}
}
}
}
if (chunk_header.ckSize < 22)
config->qmode |= QMODE_BIG_ENDIAN;
else if (!strncmp (common_chunk.compressionType, "NONE", 4) || !strncmp (common_chunk.compressionType, "none", 4))
config->qmode |= QMODE_BIG_ENDIAN;
else if (!strncmp (common_chunk.compressionType, "FL32", 4) || !strncmp (common_chunk.compressionType, "fl32", 4)) {
config->qmode |= QMODE_BIG_ENDIAN;
floatData = TRUE;
}
else if (strncmp (common_chunk.compressionType, "SOWT", 4) && strncmp (common_chunk.compressionType, "sowt", 4))
supported = FALSE;
if (sampleRate <= 0.0 || sampleRate > 16777215.0)
supported = FALSE;
if (floatData && common_chunk.sampleSize != 32)
supported = FALSE;
if (!common_chunk.numChannels || common_chunk.numChannels > WAVPACK_MAX_CLI_CHANS)
supported = FALSE;
if (common_chunk.sampleSize < 1 || common_chunk.sampleSize > 32)
supported = FALSE;
if (!supported) {
error_line ("%s is an unsupported .AIF%c format!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
if (sampleRate != floor (sampleRate))
error_line ("warning: the nonintegral sample rate of %s will be rounded", infilename);
if (sampleRate < 1.0)
config->sample_rate = 1;
else
config->sample_rate = (int) floor (sampleRate + 0.5);
config->bytes_per_sample = (common_chunk.sampleSize + 7) / 8;
config->bits_per_sample = common_chunk.sampleSize;
config->num_channels = common_chunk.numChannels;
if ((config->qmode & QMODE_EVEN_BYTE_DEPTH) && (config->bits_per_sample % 8))
config->bits_per_sample += 8 - (config->bits_per_sample % 8);
if (!config->channel_mask && !(config->qmode & QMODE_CHANS_UNASSIGNED)) {
if (common_chunk.numChannels <= 2)
config->channel_mask = 0x5 - common_chunk.numChannels;
else if (common_chunk.numChannels <= 18)
config->channel_mask = (1 << common_chunk.numChannels) - 1;
else
config->channel_mask = 0x3ffff;
}
if (common_chunk.sampleSize <= 8)
config->qmode |= QMODE_SIGNED_BYTES;
if (floatData)
config->float_norm_exp = 127;
if (debug_logging_mode) {
if (config->float_norm_exp == 127)
error_line ("data format: 32-bit big-endian floating point");
else if (config->bytes_per_sample == 1)
error_line ("data format: %d-bit signed integers stored in %d byte",
config->bits_per_sample, config->bytes_per_sample);
else
error_line ("data format: %d-bit %s-endian integers stored in %d byte(s)",
config->bits_per_sample, (config->qmode & QMODE_BIG_ENDIAN) ? "big" : "little", config->bytes_per_sample);
}
}
else if (!strncmp (chunk_header.ckID, "SSND", 4)) { // on the data chunk, get size and exit loop
int64_t data_chunk_size;
int bytes_per_frame;
if (!common_chunks || chunk_header.ckSize < sizeof (sound_chunk) ||
/* (!version_chunks && aiff_chunk_header.formType [3] == 'C') || */
!DoReadFile (infile, &sound_chunk, sizeof (sound_chunk), &bcount) ||
bcount != sizeof (sound_chunk)) {
error_line ("%s is not a valid .AIF%c file!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
else if (!(config->qmode & QMODE_NO_STORE_WRAPPER) &&
!WavpackAddWrapper (wpc, &sound_chunk, sizeof (sound_chunk))) {
error_line ("%s", WavpackGetErrorMessage (wpc));
return WAVPACK_SOFT_ERROR;
}
WavpackBigEndianToNative (&sound_chunk, SoundChunkFormat);
// The "offset" and "blockSize" fields are normally zero, and we don't handle any kind of crazy
// alignment rules. However, we CAN handle a simple small "offset" (by adding it to the sound
// chunk) and a "blockSize" that matches the actual block size (can't complain about that).
if (sound_chunk.offset > 65536 || (sound_chunk.blockSize != 0 &&
sound_chunk.blockSize != config->bytes_per_sample * config->num_channels)) {
error_line ("%s is an unsupported .AIF%c format!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
if (sound_chunk.offset) {
unsigned char *offset_data = malloc (sound_chunk.offset);
if (!DoReadFile (infile, offset_data, sound_chunk.offset, &bcount) || bcount != sound_chunk.offset ||
(!(config->qmode & QMODE_NO_STORE_WRAPPER) && !WavpackAddWrapper (wpc, offset_data, sound_chunk.offset))) {
error_line ("%s", WavpackGetErrorMessage (wpc));
free (offset_data);
return WAVPACK_SOFT_ERROR;
}
free (offset_data);
}
data_chunk_size = chunk_header.ckSize - sizeof (sound_chunk) - sound_chunk.offset;
bytes_per_frame = config->bytes_per_sample * config->num_channels;
if (infilesize && !(config->qmode & QMODE_IGNORE_LENGTH) && infilesize - data_chunk_size > 16777216) {
error_line ("this .AIF file has over 16 MB of extra AIF data, probably is corrupt!");
return WAVPACK_SOFT_ERROR;
}
if (config->qmode & QMODE_IGNORE_LENGTH) {
if (infilesize && DoGetFilePosition (infile) != -1)
total_samples = (infilesize - DoGetFilePosition (infile)) / bytes_per_frame;
else
total_samples = -1;
}
else {
total_samples = data_chunk_size / bytes_per_frame;
if (total_samples != common_chunk.numSampleFrames) {
total_samples = (data_chunk_size + sizeof (sound_chunk)) / bytes_per_frame;
if (total_samples != common_chunk.numSampleFrames) {
error_line ("%s is not a valid .AIF%c file!", infilename);
return WAVPACK_SOFT_ERROR;
}
else
error_line ("warning: %s has a malformed chunk size which will be ignored", infilename);
}
if (!total_samples) {
error_line ("%s has no audio samples, probably is corrupt!", infilename);
return WAVPACK_SOFT_ERROR;
}
if (total_samples > MAX_WAVPACK_SAMPLES) {
error_line ("%s has too many samples for WavPack!", infilename);
return WAVPACK_SOFT_ERROR;
}
}
break;
}
else { // just copy unknown chunks to output file
char *buff;
if (padded_chunk_size < 0 || padded_chunk_size > 4194304) {
error_line ("%s is not a valid .AIF%c file!", infilename, aiff_chunk_header.formType [3]);
return WAVPACK_SOFT_ERROR;
}
buff = malloc (padded_chunk_size);
if (debug_logging_mode)
error_line ("extra unknown chunk \"%c%c%c%c\" of %d bytes",
chunk_header.ckID [0], chunk_header.ckID [1], chunk_header.ckID [2],
chunk_header.ckID [3], chunk_header.ckSize);
if (!DoReadFile (infile, buff, padded_chunk_size, &bcount) || bcount != padded_chunk_size ||
(!(config->qmode & QMODE_NO_STORE_WRAPPER) && !WavpackAddWrapper (wpc, buff, padded_chunk_size))) {
error_line ("%s", WavpackGetErrorMessage (wpc));
free (buff);
return WAVPACK_SOFT_ERROR;
}
free (buff);
}
}
if (!WavpackSetConfiguration64 (wpc, config, total_samples, NULL)) {
error_line ("%s: %s", infilename, WavpackGetErrorMessage (wpc));
return WAVPACK_SOFT_ERROR;
}
return WAVPACK_NO_ERROR;
}
|
