diff options
Diffstat (limited to 'libs/taglib/taglib/ogg/speex/speexproperties.cpp')
-rw-r--r-- | libs/taglib/taglib/ogg/speex/speexproperties.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/libs/taglib/taglib/ogg/speex/speexproperties.cpp b/libs/taglib/taglib/ogg/speex/speexproperties.cpp new file mode 100644 index 0000000000..29deb019c1 --- /dev/null +++ b/libs/taglib/taglib/ogg/speex/speexproperties.cpp @@ -0,0 +1,170 @@ +/*************************************************************************** + copyright : (C) 2006 by Lukáš Lalinský + email : lalinsky@gmail.com + + copyright : (C) 2002 - 2008 by Scott Wheeler + email : wheeler@kde.org + (original Vorbis implementation) + ***************************************************************************/ + +/*************************************************************************** + * This library is free software; you can redistribute it and/or modify * + * it under the terms of the GNU Lesser General Public License version * + * 2.1 as published by the Free Software Foundation. * + * * + * This library is distributed in the hope that it will be useful, but * + * WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * + * Lesser General Public License for more details. * + * * + * You should have received a copy of the GNU Lesser General Public * + * License along with this library; if not, write to the Free Software * + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * + * USA * + * * + * Alternatively, this file is available under the Mozilla Public * + * License Version 1.1. You may obtain a copy of the License at * + * http://www.mozilla.org/MPL/ * + ***************************************************************************/ + +#include <tstring.h> +#include <tdebug.h> + +#include <oggpageheader.h> + +#include "speexproperties.h" +#include "speexfile.h" + +using namespace TagLib; +using namespace TagLib::Ogg; + +class Speex::Properties::PropertiesPrivate +{ +public: + PropertiesPrivate(File *f, ReadStyle s) : + file(f), + style(s), + length(0), + bitrate(0), + sampleRate(0), + channels(0), + speexVersion(0), + vbr(false), + mode(0) {} + + File *file; + ReadStyle style; + int length; + int bitrate; + int sampleRate; + int channels; + int speexVersion; + bool vbr; + int mode; +}; + +//////////////////////////////////////////////////////////////////////////////// +// public members +//////////////////////////////////////////////////////////////////////////////// + +Speex::Properties::Properties(File *file, ReadStyle style) : AudioProperties(style) +{ + d = new PropertiesPrivate(file, style); + read(); +} + +Speex::Properties::~Properties() +{ + delete d; +} + +int Speex::Properties::length() const +{ + return d->length; +} + +int Speex::Properties::bitrate() const +{ + return int(float(d->bitrate) / float(1000) + 0.5); +} + +int Speex::Properties::sampleRate() const +{ + return d->sampleRate; +} + +int Speex::Properties::channels() const +{ + return d->channels; +} + +int Speex::Properties::speexVersion() const +{ + return d->speexVersion; +} + +//////////////////////////////////////////////////////////////////////////////// +// private members +//////////////////////////////////////////////////////////////////////////////// + +void Speex::Properties::read() +{ + // Get the identification header from the Ogg implementation. + + ByteVector data = d->file->packet(0); + + int pos = 28; + + // speex_version_id; /**< Version for Speex (for checking compatibility) */ + d->speexVersion = data.mid(pos, 4).toUInt(false); + pos += 4; + + // header_size; /**< Total size of the header ( sizeof(SpeexHeader) ) */ + pos += 4; + + // rate; /**< Sampling rate used */ + d->sampleRate = data.mid(pos, 4).toUInt(false); + pos += 4; + + // mode; /**< Mode used (0 for narrowband, 1 for wideband) */ + d->mode = data.mid(pos, 4).toUInt(false); + pos += 4; + + // mode_bitstream_version; /**< Version ID of the bit-stream */ + pos += 4; + + // nb_channels; /**< Number of channels encoded */ + d->channels = data.mid(pos, 4).toUInt(false); + pos += 4; + + // bitrate; /**< Bit-rate used */ + d->bitrate = data.mid(pos, 4).toUInt(false); + pos += 4; + + // frame_size; /**< Size of frames */ + // unsigned int frameSize = data.mid(pos, 4).toUInt(false); + pos += 4; + + // vbr; /**< 1 for a VBR encoding, 0 otherwise */ + d->vbr = data.mid(pos, 4).toUInt(false) == 1; + pos += 4; + + // frames_per_packet; /**< Number of frames stored per Ogg packet */ + // unsigned int framesPerPacket = data.mid(pos, 4).toUInt(false); + + const Ogg::PageHeader *first = d->file->firstPageHeader(); + const Ogg::PageHeader *last = d->file->lastPageHeader(); + + if(first && last) { + long long start = first->absoluteGranularPosition(); + long long end = last->absoluteGranularPosition(); + + if(start >= 0 && end >= 0 && d->sampleRate > 0) + d->length = (int) ((end - start) / (long long) d->sampleRate); + else + debug("Speex::Properties::read() -- Either the PCM values for the start or " + "end of this file was incorrect or the sample rate is zero."); + } + else + debug("Speex::Properties::read() -- Could not find valid first and last Ogg pages."); +} |