0fb2182d46
frame size and use the function in the FLAC decoder and FLAC encoder Originally committed as revision 18092 to svn://svn.ffmpeg.org/ffmpeg/trunk
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/*
|
|
* FLAC common code
|
|
* Copyright (c) 2009 Justin Ruggles
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "flac.h"
|
|
|
|
int ff_flac_get_max_frame_size(int blocksize, int ch, int bps)
|
|
{
|
|
/* Technically, there is no limit to FLAC frame size, but an encoder
|
|
should not write a frame that is larger than if verbatim encoding mode
|
|
were to be used. */
|
|
|
|
int count;
|
|
|
|
count = 16; /* frame header */
|
|
count += ch * ((7+bps+7)/8); /* subframe headers */
|
|
if (ch == 2) {
|
|
/* for stereo, need to account for using decorrelation */
|
|
count += (( 2*bps+1) * blocksize + 7) / 8;
|
|
} else {
|
|
count += ( ch*bps * blocksize + 7) / 8;
|
|
}
|
|
count += 2; /* frame footer */
|
|
|
|
return count;
|
|
}
|