1/*
2 * FLAC common code
3 * Copyright (c) 2009 Justin Ruggles
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "flac.h"
23
24int ff_flac_get_max_frame_size(int blocksize, int ch, int bps)
25{
26    /* Technically, there is no limit to FLAC frame size, but an encoder
27       should not write a frame that is larger than if verbatim encoding mode
28       were to be used. */
29
30    int count;
31
32    count = 16;                  /* frame header */
33    count += ch * ((7+bps+7)/8); /* subframe headers */
34    if (ch == 2) {
35        /* for stereo, need to account for using decorrelation */
36        count += (( 2*bps+1) * blocksize + 7) / 8;
37    } else {
38        count += ( ch*bps    * blocksize + 7) / 8;
39    }
40    count += 2; /* frame footer */
41
42    return count;
43}
44