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69 lines
2.7 KiB
69 lines
2.7 KiB
/*****************************************************************************
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* oggseek.h : ogg seeking functions for ogg demuxer vlc
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*****************************************************************************
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* Copyright (C) 2008 - 2010 Gabriel Finch <salsaman@gmail.com>
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*
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* Authors: Gabriel Finch <salsaman@gmail.com>
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* adapted from: http://lives.svn.sourceforge.net/viewvc/lives/trunk/lives-plugins
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* /plugins/decoders/ogg_theora_decoder.c
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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//#define OGG_SEEK_DEBUG 1
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#ifdef OGG_SEEK_DEBUG
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#define OggDebug(code) code
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#define OggNoDebug(code)
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#else
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#define OggDebug(code)
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#define OggNoDebug(code) code
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#endif
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#define PAGE_HEADER_BYTES 27
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#define OGGSEEK_BYTES_TO_READ 8500
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/* index entries are structured as follows:
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* - for theora, highest granulepos -> pagepos (bytes) where keyframe begins
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* - for dirac, kframe (sync point) -> pagepos of sequence start (?)
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*/
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/* this is typedefed to demux_index_entry_t in ogg.h */
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struct oggseek_index_entry
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{
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demux_index_entry_t *p_next;
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demux_index_entry_t *p_prev;
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/* value is highest granulepos for theora, sync frame for dirac */
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vlc_tick_t i_value;
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int64_t i_pagepos;
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/* not used for theora because the granulepos tells us this */
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int64_t i_pagepos_end;
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};
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int Oggseek_BlindSeektoAbsoluteTime ( demux_t *, logical_stream_t *, vlc_tick_t, bool );
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int Oggseek_BlindSeektoPosition ( demux_t *, logical_stream_t *, double f, bool );
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int Oggseek_SeektoAbsolutetime ( demux_t *, logical_stream_t *, vlc_tick_t );
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const demux_index_entry_t *OggSeek_IndexAdd ( logical_stream_t *, vlc_tick_t, int64_t );
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void Oggseek_ProbeEnd( demux_t * );
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void oggseek_index_entries_free ( demux_index_entry_t * );
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int64_t oggseek_read_page ( demux_t * );
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