void MPEG2TransportStreamIndexFile::closeFid() {
if (fFid != NULL) {
CloseInputFile(fFid);
fFid = NULL;
}
}
AMRAudioFileSource::~AMRAudioFileSource() {
CloseInputFile(fFid);
}
AMRAudioFileSource*
AMRAudioFileSource::createNew(UsageEnvironment& env, char const* fileName) {
#ifdef __LINUX__
FILE* fid = NULL;
#else
UFILE* fid = NULL;
#endif
Boolean magicNumberOK = True;
do {
fid = OpenInputFile(env, fileName);
if (fid == NULL) break;
// Now, having opened the input file, read the first few bytes, to
// check the required 'magic number':
magicNumberOK = False; // until we learn otherwise
Boolean isWideband = False; // by default
unsigned numChannels = 1; // by default
char buf[100];
// Start with the first 6 bytes (the first 5 of which must be "#!AMR"):
#ifdef __LINUX__
if (fread(buf, 1, 6, fid) < 6) break;
#else
u32 read_size = 0;
int ret = 0;
ret = ufs_read(fid, buf, 6, &read_size);
if ((read_size != 6) || (ret != FR_OK)) break;
#endif
if (strncmp(buf, "#!AMR", 5) != 0) break; // bad magic #
unsigned bytesRead = 6;
// The next bytes must be "\n", "-WB\n", "_MC1.0\n", or "-WB_MC1.0\n"
if (buf[5] == '-') {
// The next bytes must be "WB\n" or "WB_MC1.0\n"
#ifdef __LINUX__
if (fread(&buf[bytesRead], 1, 3, fid) < 3) break;
#else
u32 read_size = 0;
int ret = 0;
ret = ufs_read(fid, &buf[bytesRead], 3, &read_size);
if ((read_size != 3) || (ret != FR_OK)) break;
#endif
if (strncmp(&buf[bytesRead], "WB", 2) != 0) break; // bad magic #
isWideband = True;
bytesRead += 3;
}
if (buf[bytesRead-1] == '_') {
// The next bytes must be "MC1.0\n"
#ifdef __LINUX__
if (fread(&buf[bytesRead], 1, 6, fid) < 6) break;
#else
u32 read_size = 0;
int ret = 0;
ret = ufs_read(fid, &buf[bytesRead], 6, &read_size);
if ((read_size != 6) || (ret != FR_OK)) break;
#endif
if (strncmp(&buf[bytesRead], "MC1.0\n", 6) != 0) break; // bad magic #
bytesRead += 6;
// The next 4 bytes contain the number of channels:
char channelDesc[4];
#ifdef __LINUX__
if (fread(channelDesc, 1, 4, fid) < 4) break;
#else
ret = ufs_read(fid, channelDesc, 4, &read_size);
if ((read_size != 4) || (ret != FR_OK)) break;
#endif
numChannels = channelDesc[3]&0xF;
} else if (buf[bytesRead-1] != '\n') {
break; // bad magic #
}
// If we get here, the magic number was OK:
magicNumberOK = True;
#ifdef DEBUG
fprintf(stderr, "isWideband: %d, numChannels: %d\n",
isWideband, numChannels);
#endif
return new AMRAudioFileSource(env, fid, isWideband, numChannels);
} while (0);
// An error occurred:
CloseInputFile(fid);
if (!magicNumberOK) {
env.setResultMsg("Bad (or nonexistent) AMR file header");
}
return NULL;
}
WAVAudioFileSource::~WAVAudioFileSource() {
CloseInputFile(fFid);
}
