ce49d99c2f
Since we switched from autotools to Meson in commit 94592c14062d5afc9482d11baa401648082022c0, we don't need to include `config.h` early to properly enable large file support. Meson passes the required macros on the compiler command line instead of defining them in `config.h`. This means we can include `config.h` at any time, whenever we want to check its macros, and there are no ordering constraints.
99 lines
2.0 KiB
C++
99 lines
2.0 KiB
C++
/*
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* Copyright 2003-2018 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "OggSyncState.hxx"
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#include "fs/io/Reader.hxx"
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bool
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OggSyncState::Feed(size_t size)
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{
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char *buffer = ogg_sync_buffer(&oy, size);
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if (buffer == nullptr)
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return false;
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size_t nbytes = reader.Read(buffer, size);
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if (nbytes == 0)
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return false;
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ogg_sync_wrote(&oy, nbytes);
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return true;
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}
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bool
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OggSyncState::ExpectPage(ogg_page &page)
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{
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while (true) {
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int r = ogg_sync_pageout(&oy, &page);
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if (r != 0)
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return r > 0;
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if (!Feed(1024))
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return false;
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}
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}
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bool
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OggSyncState::ExpectPageIn(ogg_stream_state &os)
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{
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ogg_page page;
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if (!ExpectPage(page))
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return false;
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ogg_stream_pagein(&os, &page);
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return true;
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}
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bool
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OggSyncState::ExpectPageSeek(ogg_page &page)
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{
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size_t remaining_skipped = 32768;
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while (true) {
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int r = ogg_sync_pageseek(&oy, &page);
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if (r > 0)
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return true;
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if (r < 0) {
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/* skipped -r bytes */
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size_t nbytes = -r;
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if (nbytes > remaining_skipped)
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/* still no ogg page - we lost our
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patience, abort */
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return false;
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remaining_skipped -= nbytes;
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continue;
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}
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if (!Feed(1024))
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return false;
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}
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}
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bool
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OggSyncState::ExpectPageSeekIn(ogg_stream_state &os)
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{
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ogg_page page;
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if (!ExpectPageSeek(page))
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return false;
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ogg_stream_pagein(&os, &page);
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return true;
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}
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