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Added TagLib::MP4::PropertyMap::codec()

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This commit is contained in:
Lukáš Lalinský
2013-10-08 17:41:09 +02:00
parent 9b5869ea37
commit 2d5abd46d2
4 changed files with 24 additions and 4 deletions
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16
taglib/mp4/mp4properties.cpp
View File

@ -34,7 +34,7 @@ using namespace TagLib;
class MP4::Properties::PropertiesPrivate
{
public:
PropertiesPrivate() : length(0), bitrate(0), sampleRate(0), channels(0), bitsPerSample(0), encrypted(false) {}
PropertiesPrivate() : length(0), bitrate(0), sampleRate(0), channels(0), bitsPerSample(0), encrypted(false), codec(MP4::Properties::Unknown) {}
int length;
int bitrate;
@ -42,6 +42,7 @@ public:
int channels;
int bitsPerSample;
bool encrypted;
Codec codec;
};
MP4::Properties::Properties(File *file, MP4::Atoms *atoms, ReadStyle style)
@ -114,6 +115,7 @@ MP4::Properties::Properties(File *file, MP4::Atoms *atoms, ReadStyle style)
file->seek(atom->offset);
data = file->readBlock(atom->length);
if(data.mid(20, 4) == "mp4a") {
d->codec = AAC;
d->channels = data.toShort(40U);
d->bitsPerSample = data.toShort(42U);
d->sampleRate = data.toUInt(46U);
@ -135,10 +137,11 @@ MP4::Properties::Properties(File *file, MP4::Atoms *atoms, ReadStyle style)
}
else if (data.mid(20, 4) == "alac") {
if (atom->length == 88 && data.mid(56, 4) == "alac") {
d->codec = ALAC;
d->bitsPerSample = data.at(69);
d->channels = data.at(73);
d->bitrate = data.toUInt(80U) / 1000;
d->sampleRate = data.toUInt(84U);
d->channels = data.at(73);
d->bitrate = data.toUInt(80U) / 1000;
d->sampleRate = data.toUInt(84U);
}
}
@ -189,3 +192,8 @@ MP4::Properties::isEncrypted() const
return d->encrypted;
}
MP4::Properties::Codec MP4::Properties::codec() const
{
return d->codec;
}

9
taglib/mp4/mp4properties.h
View File

@ -40,6 +40,12 @@ namespace TagLib {
class TAGLIB_EXPORT Properties : public AudioProperties
{
public:
enum Codec {
Unknown = 0,
AAC,
ALAC
};
Properties(File *file, Atoms *atoms, ReadStyle style = Average);
virtual ~Properties();
@ -50,6 +56,9 @@ namespace TagLib {
virtual int bitsPerSample() const;
bool isEncrypted() const;
//! Audio codec used in the MP4 file
Codec codec() const;
private:
class PropertiesPrivate;
PropertiesPrivate *d;