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44 lines
1.4 KiB
44 lines
1.4 KiB
16 years ago
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/*
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* FLAC common code
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* Copyright (c) 2009 Justin Ruggles
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* 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
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "flac.h"
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int ff_flac_get_max_frame_size(int blocksize, int ch, int bps)
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{
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/* Technically, there is no limit to FLAC frame size, but an encoder
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should not write a frame that is larger than if verbatim encoding mode
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were to be used. */
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int count;
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count = 16; /* frame header */
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count += ch * ((7+bps+7)/8); /* subframe headers */
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if (ch == 2) {
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/* for stereo, need to account for using decorrelation */
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count += (( 2*bps+1) * blocksize + 7) / 8;
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} else {
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count += ( ch*bps * blocksize + 7) / 8;
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}
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count += 2; /* frame footer */
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return count;
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}
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