/*************************************************************************** copyright : (C) 2006 by Lukáš Lalinský email : lalinsky@gmail.com copyright : (C) 2002 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., 51 Franklin Street, Fifth Floor, Boston, * * MA 02110-1301 USA * ***************************************************************************/ #include <tstring.h> #if 0 #include <tdebug.h> #endif #include <oggpageheader.h> #include "speexproperties.h" #include "speexfile.h" using namespace TagLib; 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 = (end - start) / (long long) d->sampleRate; #if 0 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."); #endif } #if 0 else debug("Speex::Properties::read() -- Could not find valid first and last Ogg pages."); #endif }