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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-write.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 "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 [256-22];
} CommonChunk;
#pragma pack(pop)
#define CommonChunkFormat "SLSSD"
typedef struct {
uint32_t offset;
uint32_t blockSize;
} SoundChunk;
#define SoundChunkFormat "LL"
#define AIFCVersion1 0xA2805140 // Version 1 of AIFF-C
// this is 2726318400 in decimal
extern int debug_logging_mode;
static void put_extended (int value, uint16_t *exponent, uint64_t *mantissa)
{
if (value == 0) {
*exponent = 0;
*mantissa = 0;
return;
}
*exponent = value < 0 ? 16446 | 0x8000 : 16446;
*mantissa = abs (value);
while (!(*mantissa & 0x8000000000000000ULL)) {
*mantissa <<= 1;
(*exponent)--;
}
}
int WriteAiffHeader (FILE *outfile, WavpackContext *wpc, int64_t total_samples, int qmode)
{
ChunkHeader version_header, common_header, sound_header;
uint32_t bcount, timestamp = AIFCVersion1;
int aifc = 0, common_chunk_size = 18;
RiffChunkHeader aiff_header;
CommonChunk common_chunk;
SoundChunk sound_chunk;
int64_t total_data_bytes, total_aiff_bytes;
int num_channels = WavpackGetNumChannels (wpc);
uint32_t sample_rate = WavpackGetSampleRate (wpc);
int bytes_per_sample = WavpackGetBytesPerSample (wpc);
int bits_per_sample = WavpackGetBitsPerSample (wpc);
int float_format = WavpackGetFloatNormExp (wpc);
uint64_t mantissa;
if (float_format) {
if (float_format != 127 || !(qmode & QMODE_BIG_ENDIAN)) {
error_line ("can't create valid AIF header for non-normalized or little-endian floating data!");
return FALSE;
}
aifc = 1;
}
else if (bits_per_sample > 8 && !(qmode & QMODE_BIG_ENDIAN))
aifc = 1;
if (total_samples == -1)
total_samples = 0x7ffff000 / (bytes_per_sample * num_channels);
total_data_bytes = total_samples * bytes_per_sample * num_channels;
if (total_data_bytes > 0xff000000) {
error_line ("can't create valid AIF header for long file, total_data_bytes = %lld", total_data_bytes);
return FALSE;
}
if (aifc) {
char *compressionType, *compressionName;
if (float_format) {
compressionType = "fl32";
compressionName = "IEEE 32-bit float";
}
else if (bits_per_sample > 8 && !(qmode & QMODE_BIG_ENDIAN)) {
compressionType = "sowt";
compressionName = "";
}
else {
compressionType = "NONE";
compressionName = "not compressed";
}
memcpy (common_chunk.compressionType, compressionType, sizeof (common_chunk.compressionType));
common_chunk_size += 4;
common_chunk.compressionName [0] = (char) strlen (compressionName);
common_chunk_size++;
strcpy (common_chunk.compressionName + 1, compressionName);
common_chunk_size += (unsigned char) common_chunk.compressionName [0];
common_chunk_size += common_chunk_size & 1;
memcpy (version_header.ckID, "FVER", sizeof (version_header.ckID));
version_header.ckSize = sizeof (timestamp);
WavpackNativeToBigEndian (&version_header, ChunkHeaderFormat);
WavpackNativeToBigEndian (×tamp, "L");
}
total_aiff_bytes = sizeof (aiff_header) + sizeof (common_header) + common_chunk_size + sizeof (sound_header) + sizeof (sound_chunk);
if (aifc) total_aiff_bytes += sizeof (version_header) + sizeof (timestamp);
total_aiff_bytes += (total_data_bytes + 1) & ~(int64_t)1;
memcpy (aiff_header.ckID, "FORM", sizeof (aiff_header.ckID));
aiff_header.ckSize = (uint32_t)(total_aiff_bytes - sizeof (ChunkHeader));
memcpy (aiff_header.formType, aifc ? "AIFC" : "AIFF", sizeof (aiff_header.formType));
WavpackNativeToBigEndian (&aiff_header, ChunkHeaderFormat);
memcpy (common_header.ckID, "COMM", sizeof (common_header.ckID));
common_header.ckSize = common_chunk_size;
WavpackNativeToBigEndian (&common_header, ChunkHeaderFormat);
common_chunk.numChannels = num_channels;
common_chunk.numSampleFrames = (uint32_t) total_samples;
common_chunk.sampleSize = bits_per_sample;
put_extended (sample_rate, &common_chunk.sampleRateExponent, &mantissa); // mantissa is not properly aligned, so use local
memcpy (&common_chunk.sampleRateMantissa, &mantissa, sizeof (mantissa));
WavpackNativeToBigEndian (&common_chunk, CommonChunkFormat);
memcpy (sound_header.ckID, "SSND", sizeof (sound_header.ckID));
sound_header.ckSize = (uint32_t)(sizeof (sound_chunk) + total_data_bytes);
WavpackNativeToBigEndian (&sound_header, ChunkHeaderFormat);
sound_chunk.offset = sound_chunk.blockSize = 0;
WavpackNativeToBigEndian (&sound_chunk, SoundChunkFormat);
if (!DoWriteFile (outfile, &aiff_header, sizeof (aiff_header), &bcount) || bcount != sizeof (aiff_header) ||
(aifc && (!DoWriteFile (outfile, &version_header, sizeof (version_header), &bcount) || bcount != sizeof (version_header))) ||
(aifc && (!DoWriteFile (outfile, ×tamp, sizeof (timestamp), &bcount) || bcount != sizeof (timestamp))) ||
!DoWriteFile (outfile, &common_header, sizeof (common_header), &bcount) || bcount != sizeof (common_header) ||
!DoWriteFile (outfile, &common_chunk, common_chunk_size, &bcount) || bcount != common_chunk_size ||
!DoWriteFile (outfile, &sound_header, sizeof (sound_header), &bcount) || bcount != sizeof (sound_header) ||
!DoWriteFile (outfile, &sound_chunk, sizeof (sound_chunk), &bcount) || bcount != sizeof (sound_chunk)) {
error_line ("can't write .AIF data, disk probably full!");
return FALSE;
}
return TRUE;
}
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