/** Fix a QuickTime/iPod issue with long audio files.
*
* This function checks if the <b>file</b> is a long audio file (more than
* about 6 1/2 hours) and modifies the timescale if necessary to allow
* playback of the file in QuickTime player and on some iPod models.
*
* @param file the opened MP4 file
*/
void
ChapterUtility::fixQtScale(MP4FileHandle file)
{
// get around a QuickTime/iPod issue with storing the number of samples in a signed 32Bit value
if( INT_MAX < MP4GetDuration(file))
{
bool isVideoTrack = false;
if( MP4_IS_VALID_TRACK_ID(getReferencingTrack( file, isVideoTrack )) & isVideoTrack )
{
// if it is a video, everything is different
return;
}
// timescale too high, lower it
MP4ChangeMovieTimeScale(file, 1000);
}
}
bool mediaM4A(Artwork *art, const char *filePath)
{
MP4FileHandle mp4file = MP4Read(filePath);
if (mp4file == MP4_INVALID_FILE_HANDLE) {
return false;
}
uint16_t numvalue, numvalue2;
char *value;
u_int8_t numbool;
art->filetype = FILETYPE_M4A;
if (MP4GetMetadataArtist(mp4file, &value) && value != NULL)
{
art->artist = (QString::fromUtf8(value)).trimmed();
free(value);
}
if (MP4GetMetadataYear(mp4file, &value) && value != NULL)
{
art->year = QString(value).toInt();
free(value);
}
if (MP4GetMetadataAlbum(mp4file, &value) && value != NULL)
{
art->album = (QString::fromUtf8(value)).trimmed();
free(value);
}
if (MP4GetMetadataName(mp4file, &value) && value != NULL)
{
art->track = (QString::fromUtf8(value)).trimmed();
free(value);
}
if (MP4GetMetadataWriter(mp4file, &value) && value != NULL)
{
// composer
free(value);
}
if (MP4GetMetadataTrack(mp4file, &numvalue, &numvalue2))
{
art->trackNo = numvalue;
art->trackCount = numvalue2;
}
if (MP4GetMetadataDisk(mp4file, &numvalue, &numvalue2))
{
art->discNo = numvalue;
art->discCount = numvalue2;
}
if (MP4GetMetadataGenre(mp4file, &value) && value != NULL)
{
art->genre = (QString::fromUtf8(value)).trimmed();
free(value);
}
if (MP4GetMetadataCompilation(mp4file, &numbool))
{
art->type = numbool ? ARTWORK_COMPILATION : ARTWORK_NORMAL;
}
/*
art->bitrate = 0;
art->sampleRate = 0;
art->channels = 0;
*/
MP4Duration duration = MP4GetDuration(mp4file);
if (duration != MP4_INVALID_DURATION) {
u_int64_t timescale = MP4GetTimeScale(mp4file);
u_int64_t msectime = (duration * (u_int64_t) 1000) / timescale;
u_int64_t sectime, mintime, hrtime;
if (msectime == 0) {
hrtime = mintime = sectime = (u_int64_t) 0;
}
else {
hrtime = msectime / (u_int64_t) (3600 * 1000);
msectime -= hrtime * (u_int64_t) (3600 * 1000);
mintime = msectime / (u_int64_t) (60 * 1000);
msectime -= (mintime * (u_int64_t) (60 * 1000));
sectime = msectime / (u_int64_t) (1000);
msectime -= sectime * (u_int64_t)(1000);
}
art->duration = hrtime * 3600 + mintime * 60 + sectime;
}
art->makeSearchable();
if (!art->hasCover()) {
uint8_t *cover = NULL;
uint32_t cover_size;
if (MP4GetMetadataCoverArt(mp4file, &cover, &cover_size)) {
if (saveImage(art, (const char*) cover, cover_size)) {
qDebug() << "MP4: invalid image in " << filePath;
}
}
if (cover) {
free(cover);
}
}
MP4Close(mp4file);
return true;
}
double MP4Streamer::GetDuration()
{
return MP4GetDuration(mp4)/MP4GetTimeScale(mp4);
}
