mirror of https://github.com/mpv-player/mpv
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
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* Copyright (C) 2005 Alex Beregszaszi
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*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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 MPlayer; 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <limits.h>
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#include "audio/filter/af.h"
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int af_fmt2bits(int format)
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{
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if (AF_FORMAT_IS_AC3(format)) return 16;
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if (format == AF_FORMAT_UNKNOWN)
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return 0;
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switch (format & AF_FORMAT_BITS_MASK) {
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case AF_FORMAT_8BIT: return 8;
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case AF_FORMAT_16BIT: return 16;
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case AF_FORMAT_24BIT: return 24;
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case AF_FORMAT_32BIT: return 32;
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case AF_FORMAT_64BIT: return 64;
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}
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return 0;
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}
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static int bits_to_mask(int bits)
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{
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switch (bits) {
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case 8: return AF_FORMAT_8BIT;
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case 16: return AF_FORMAT_16BIT;
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case 24: return AF_FORMAT_24BIT;
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case 32: return AF_FORMAT_32BIT;
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case 64: return AF_FORMAT_64BIT;
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}
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return 0;
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}
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int af_fmt_change_bits(int format, int bits)
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{
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if (!af_fmt_is_valid(format) || (format & AF_FORMAT_SPECIAL_MASK))
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return 0;
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int mask = bits_to_mask(bits);
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format = (format & ~AF_FORMAT_BITS_MASK) | mask;
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return af_fmt_is_valid(format) ? format : 0;
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}
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#define FMT(string, id) \
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{string, id},
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#define FMT_ENDIAN(string, id) \
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{string, id}, \
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{string "ne", id}, \
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{string "le", MP_CONCAT(id, _LE)}, \
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{string "be", MP_CONCAT(id, _BE)}, \
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const struct af_fmt_entry af_fmtstr_table[] = {
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FMT("mpeg2", AF_FORMAT_MPEG2)
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FMT_ENDIAN("ac3", AF_FORMAT_AC3)
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FMT_ENDIAN("iec61937", AF_FORMAT_IEC61937)
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FMT("u8", AF_FORMAT_U8)
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FMT("s8", AF_FORMAT_S8)
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FMT_ENDIAN("u16", AF_FORMAT_U16)
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FMT_ENDIAN("s16", AF_FORMAT_S16)
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FMT_ENDIAN("u24", AF_FORMAT_U24)
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FMT_ENDIAN("s24", AF_FORMAT_S24)
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FMT_ENDIAN("u32", AF_FORMAT_U32)
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FMT_ENDIAN("s32", AF_FORMAT_S32)
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FMT_ENDIAN("float", AF_FORMAT_FLOAT)
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FMT_ENDIAN("double", AF_FORMAT_DOUBLE)
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{0}
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};
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bool af_fmt_is_valid(int format)
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{
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for (int i = 0; af_fmtstr_table[i].name; i++) {
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if (af_fmtstr_table[i].format == format)
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return true;
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}
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return false;
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}
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const char *af_fmt_to_str(int format)
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{
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for (int i = 0; af_fmtstr_table[i].name; i++) {
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if (af_fmtstr_table[i].format == format)
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return af_fmtstr_table[i].name;
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}
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return "??";
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}
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int af_fmt_seconds_to_bytes(int format, float seconds, int channels, int samplerate)
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{
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int bps = (af_fmt2bits(format) / 8);
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int framelen = channels * bps;
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int bytes = seconds * bps * samplerate;
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if (bytes % framelen)
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bytes += framelen - (bytes % framelen);
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return bytes;
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}
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int af_str2fmt_short(bstr str)
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{
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for (int i = 0; af_fmtstr_table[i].name; i++) {
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if (!bstrcasecmp0(str, af_fmtstr_table[i].name))
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return af_fmtstr_table[i].format;
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}
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return 0;
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}
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