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/*
* Copyright (C) 2005 Alex Beregszaszi
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <limits.h>
#include "audio/filter/af.h"
int af_fmt2bits(int format)
{
if (AF_FORMAT_IS_AC3(format)) return 16;
if (format == AF_FORMAT_UNKNOWN)
return 0;
switch (format & AF_FORMAT_BITS_MASK) {
case AF_FORMAT_8BIT: return 8;
case AF_FORMAT_16BIT: return 16;
case AF_FORMAT_24BIT: return 24;
case AF_FORMAT_32BIT: return 32;
case AF_FORMAT_64BIT: return 64;
}
return 0;
}
static int bits_to_mask(int bits)
{
switch (bits) {
case 8: return AF_FORMAT_8BIT;
case 16: return AF_FORMAT_16BIT;
case 24: return AF_FORMAT_24BIT;
case 32: return AF_FORMAT_32BIT;
case 64: return AF_FORMAT_64BIT;
}
return 0;
}
int af_fmt_change_bits(int format, int bits)
{
if (!af_fmt_is_valid(format) || (format & AF_FORMAT_SPECIAL_MASK))
return 0;
int mask = bits_to_mask(bits);
format = (format & ~AF_FORMAT_BITS_MASK) | mask;
return af_fmt_is_valid(format) ? format : 0;
}
#define FMT(string, id) \
{string, id},
#define FMT_ENDIAN(string, id) \
{string, id}, \
{string "ne", id}, \
{string "le", MP_CONCAT(id, _LE)}, \
{string "be", MP_CONCAT(id, _BE)}, \
const struct af_fmt_entry af_fmtstr_table[] = {
FMT("mpeg2", AF_FORMAT_MPEG2)
FMT_ENDIAN("ac3", AF_FORMAT_AC3)
FMT_ENDIAN("iec61937", AF_FORMAT_IEC61937)
FMT("u8", AF_FORMAT_U8)
FMT("s8", AF_FORMAT_S8)
FMT_ENDIAN("u16", AF_FORMAT_U16)
FMT_ENDIAN("s16", AF_FORMAT_S16)
FMT_ENDIAN("u24", AF_FORMAT_U24)
FMT_ENDIAN("s24", AF_FORMAT_S24)
FMT_ENDIAN("u32", AF_FORMAT_U32)
FMT_ENDIAN("s32", AF_FORMAT_S32)
FMT_ENDIAN("float", AF_FORMAT_FLOAT)
FMT_ENDIAN("double", AF_FORMAT_DOUBLE)
{0}
};
bool af_fmt_is_valid(int format)
{
for (int i = 0; af_fmtstr_table[i].name; i++) {
if (af_fmtstr_table[i].format == format)
return true;
}
return false;
}
const char *af_fmt_to_str(int format)
{
for (int i = 0; af_fmtstr_table[i].name; i++) {
if (af_fmtstr_table[i].format == format)
return af_fmtstr_table[i].name;
}
return "??";
}
int af_fmt_seconds_to_bytes(int format, float seconds, int channels, int samplerate)
{
int bps = (af_fmt2bits(format) / 8);
int framelen = channels * bps;
int bytes = seconds * bps * samplerate;
if (bytes % framelen)
bytes += framelen - (bytes % framelen);
return bytes;
}
int af_str2fmt_short(bstr str)
{
for (int i = 0; af_fmtstr_table[i].name; i++) {
if (!bstrcasecmp0(str, af_fmtstr_table[i].name))
return af_fmtstr_table[i].format;
}
return 0;
}
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