static int
read_central_dir_values(Zipfile* file, const unsigned char* buf, int len)
{
if (len < EOCD_LEN) {
// looks like ZIP file got truncated
fprintf(stderr, " Zip EOCD: expected >= %d bytes, found %d\n",
EOCD_LEN, len);
return -1;
}
file->disknum = read_le_short(&buf[0x04]);
file->diskWithCentralDir = read_le_short(&buf[0x06]);
file->entryCount = read_le_short(&buf[0x08]);
file->totalEntryCount = read_le_short(&buf[0x0a]);
file->centralDirSize = read_le_int(&buf[0x0c]);
file->centralDirOffest = read_le_int(&buf[0x10]);
file->commentLen = read_le_short(&buf[0x14]);
if (file->commentLen > 0) {
if (EOCD_LEN + file->commentLen > len) {
fprintf(stderr, "EOCD(%d) + comment(%d) exceeds len (%d)\n",
EOCD_LEN, file->commentLen, len);
return -1;
}
file->comment = buf + EOCD_LEN;
}
return 0;
}
static int
read_central_directory_entry(Zipfile* file, Zipentry* entry,
const unsigned char** buf, ssize_t* len)
{
const unsigned char* p;
unsigned short versionMadeBy;
unsigned short versionToExtract;
unsigned short gpBitFlag;
unsigned short compressionMethod;
unsigned short lastModFileTime;
unsigned short lastModFileDate;
unsigned long crc32;
unsigned short extraFieldLength;
unsigned short fileCommentLength;
unsigned short diskNumberStart;
unsigned short internalAttrs;
unsigned long externalAttrs;
unsigned long localHeaderRelOffset;
const unsigned char* extraField;
const unsigned char* fileComment;
unsigned int dataOffset;
unsigned short lfhExtraFieldSize;
p = *buf;
if (*len < ENTRY_LEN) {
fprintf(stderr, "cde entry not large enough\n");
return -1;
}
if (read_le_int(&p[0x00]) != ENTRY_SIGNATURE) {
fprintf(stderr, "Whoops: didn't find expected signature\n");
return -1;
}
versionMadeBy = read_le_short(&p[0x04]);
versionToExtract = read_le_short(&p[0x06]);
gpBitFlag = read_le_short(&p[0x08]);
entry->compressionMethod = read_le_short(&p[0x0a]);
lastModFileTime = read_le_short(&p[0x0c]);
lastModFileDate = read_le_short(&p[0x0e]);
crc32 = read_le_int(&p[0x10]);
entry->compressedSize = read_le_int(&p[0x14]);
entry->uncompressedSize = read_le_int(&p[0x18]);
entry->fileNameLength = read_le_short(&p[0x1c]);
extraFieldLength = read_le_short(&p[0x1e]);
fileCommentLength = read_le_short(&p[0x20]);
diskNumberStart = read_le_short(&p[0x22]);
internalAttrs = read_le_short(&p[0x24]);
externalAttrs = read_le_int(&p[0x26]);
localHeaderRelOffset = read_le_int(&p[0x2a]);
p += ENTRY_LEN;
// filename
if (entry->fileNameLength != 0) {
entry->fileName = p;
} else {
entry->fileName = NULL;
}
p += entry->fileNameLength;
// extra field
if (extraFieldLength != 0) {
extraField = p;
} else {
extraField = NULL;
}
p += extraFieldLength;
// comment, if any
if (fileCommentLength != 0) {
fileComment = p;
} else {
fileComment = NULL;
}
p += fileCommentLength;
*buf = p;
// the size of the extraField in the central dir is how much data there is,
// but the one in the local file header also contains some padding.
p = file->buf + localHeaderRelOffset;
extraFieldLength = read_le_short(&p[0x1c]);
dataOffset = localHeaderRelOffset + LFH_SIZE
+ entry->fileNameLength + extraFieldLength;
entry->data = file->buf + dataOffset;
#if 0
printf("file->buf=%p entry->data=%p dataOffset=%x localHeaderRelOffset=%d "
"entry->fileNameLength=%d extraFieldLength=%d\n",
file->buf, entry->data, dataOffset, localHeaderRelOffset,
entry->fileNameLength, extraFieldLength);
#endif
return 0;
}
Track *wav_get_file_info(const gchar *filename, GError **error) {
Track *track = NULL;
gchar *fn;
gchar magic[4];
gulong len;
WaveFile *wav_file;
wav_file = g_malloc(sizeof(WaveFile));
memset(wav_file, 0, sizeof(WaveFile));
if (!(wav_file->file = fopen(filename, "rb"))) {
gchar *fn = charset_to_utf8(filename);
gtkpod_log_error(error, g_strdup_printf(_("Could not open '%s' for reading.\n"), fn));
g_free(fn);
g_free(wav_file);
wav_file = NULL;
return NULL;
}
fread(magic, 1, 4, wav_file->file);
if (strncmp(magic, "RIFF", 4) != 0)
goto file_error;
read_le_long(wav_file->file, &len);
fread(magic, 1, 4, wav_file->file);
if (strncmp(magic, "WAVE", 4) != 0)
goto file_error;
for (;;) {
fread(magic, 1, 4, wav_file->file);
if (!read_le_long(wav_file->file, &len))
goto file_error;
if (!strncmp("fmt ", magic, 4))
break;
fseek(wav_file->file, len, SEEK_CUR);
}
if (len < 16)
goto file_error;
read_le_short(wav_file->file, &wav_file->format_tag);
switch (wav_file->format_tag) {
case WAVE_FORMAT_UNKNOWN:
case WAVE_FORMAT_ALAW:
case WAVE_FORMAT_MULAW:
case WAVE_FORMAT_ADPCM:
case WAVE_FORMAT_OKI_ADPCM:
case WAVE_FORMAT_DIGISTD:
case WAVE_FORMAT_DIGIFIX:
case IBM_FORMAT_MULAW:
case IBM_FORMAT_ALAW:
case IBM_FORMAT_ADPCM:
goto file_error;
}
read_le_short(wav_file->file, &wav_file->channels);
read_le_long(wav_file->file, &wav_file->samples_per_sec);
read_le_long(wav_file->file, &wav_file->avg_bytes_per_sec);
read_le_short(wav_file->file, &wav_file->block_align);
read_le_short(wav_file->file, &wav_file->bits_per_sample);
/* if (wav_file->bits_per_sample != 8 && wav_file->bits_per_sample != 16)
goto file_error;*/
len -= 16;
if (len)
fseek(wav_file->file, len, SEEK_CUR);
for (;;) {
fread(magic, 4, 1, wav_file->file);
if (!read_le_long(wav_file->file, &len))
goto file_error;
if (!strncmp("data", magic, 4))
break;
fseek(wav_file->file, len, SEEK_CUR);
}
track = gp_track_new();
track->mediatype = ITDB_MEDIATYPE_AUDIO;
track->bitrate = wav_file->samples_per_sec * wav_file->channels * wav_file->bits_per_sample;
track->samplerate = wav_file->samples_per_sec;
track->tracklen = 1000 * ((double) 8 * len / track->bitrate);
track->bitrate /= 1000; /* change to kbps */
track->filetype = g_strdup(_("WAV audio file"));
fclose(wav_file->file);
g_free(wav_file);
wav_file = NULL;
return track;
file_error: fclose(wav_file->file);
g_free(wav_file);
wav_file = NULL;
fn = charset_to_utf8(filename);
gtkpod_log_error(error, g_strdup_printf(_("%s does not appear to be a supported wav file.\n"), fn));
g_free(fn);
return NULL;
}
static int
read_central_directory_entry(Zipfile* file, Zipentry* entry,
const unsigned char** buf, ssize_t* len)
{
const unsigned char* p;
unsigned short extraFieldLength;
unsigned short fileCommentLength;
unsigned long localHeaderRelOffset;
unsigned int dataOffset;
p = *buf;
if (*len < ENTRY_LEN) {
fprintf(stderr, "cde entry not large enough\n");
return -1;
}
if (read_le_int(&p[0x00]) != ENTRY_SIGNATURE) {
fprintf(stderr, "Whoops: didn't find expected signature\n");
return -1;
}
entry->compressionMethod = read_le_short(&p[0x0a]);
entry->compressedSize = read_le_int(&p[0x14]);
entry->uncompressedSize = read_le_int(&p[0x18]);
entry->fileNameLength = read_le_short(&p[0x1c]);
extraFieldLength = read_le_short(&p[0x1e]);
fileCommentLength = read_le_short(&p[0x20]);
localHeaderRelOffset = read_le_int(&p[0x2a]);
p += ENTRY_LEN;
// filename
if (entry->fileNameLength != 0) {
entry->fileName = p;
} else {
entry->fileName = NULL;
}
p += entry->fileNameLength;
// extra field
p += extraFieldLength;
// comment, if any
p += fileCommentLength;
*buf = p;
// the size of the extraField in the central dir is how much data there is,
// but the one in the local file header also contains some padding.
p = file->buf + localHeaderRelOffset;
extraFieldLength = read_le_short(&p[0x1c]);
dataOffset = localHeaderRelOffset + LFH_SIZE
+ entry->fileNameLength + extraFieldLength;
entry->data = file->buf + dataOffset;
#if 0
printf("file->buf=%p entry->data=%p dataOffset=%x localHeaderRelOffset=%d "
"entry->fileNameLength=%d extraFieldLength=%d\n",
file->buf, entry->data, dataOffset, localHeaderRelOffset,
entry->fileNameLength, extraFieldLength);
#endif
return 0;
}
