mirror of
https://github.com/mpv-player/mpv
synced 2024-12-28 01:52:19 +00:00
eb482140d9
In commit 5f8b060e I blindly assumed that the packet sizes were in
pseudo-samples, but they were actually in bytes. Oops.
(The effect was that cutting the audio was a bit less precise than it
can be.)
Also remove the packet size from ad_spdif.c; it didn't actually use it,
and simply takes what the spdif "muxer" returns.
246 lines
7.4 KiB
C
246 lines
7.4 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 <assert.h>
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#include "common/common.h"
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#include "audio/filter/af.h"
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int af_fmt2bps(int format)
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{
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switch (format & AF_FORMAT_BITS_MASK) {
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case AF_FORMAT_8BIT: return 1;
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case AF_FORMAT_16BIT: return 2;
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case AF_FORMAT_24BIT: return 3;
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case AF_FORMAT_32BIT: return 4;
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case AF_FORMAT_64BIT: return 8;
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}
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return 0;
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}
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int af_fmt2bits(int format)
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{
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return af_fmt2bps(format) * 8;
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}
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bool af_fmt_is_float(int format)
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{
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return !!(format & AF_FORMAT_F);
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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))
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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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static const int planar_formats[][2] = {
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{AF_FORMAT_U8P, AF_FORMAT_U8},
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{AF_FORMAT_S16P, AF_FORMAT_S16},
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{AF_FORMAT_S32P, AF_FORMAT_S32},
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{AF_FORMAT_FLOATP, AF_FORMAT_FLOAT},
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{AF_FORMAT_DOUBLEP, AF_FORMAT_DOUBLE},
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};
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// Return the planar format corresponding to the given format.
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// If the format is already planar, return it.
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// Return 0 if there's no equivalent.
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int af_fmt_to_planar(int format)
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{
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for (int n = 0; n < MP_ARRAY_SIZE(planar_formats); n++) {
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if (planar_formats[n][1] == format)
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return planar_formats[n][0];
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if (planar_formats[n][0] == format)
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return format;
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}
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return 0;
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}
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// Return the interleaved format corresponding to the given format.
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// If the format is already interleaved, return it.
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// Always succeeds if format is actually planar; otherwise return 0.
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int af_fmt_from_planar(int format)
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{
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for (int n = 0; n < MP_ARRAY_SIZE(planar_formats); n++) {
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if (planar_formats[n][0] == format)
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return planar_formats[n][1];
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}
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return format;
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}
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// false for interleaved and AF_FORMAT_UNKNOWN
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bool af_fmt_is_planar(int format)
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{
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return !!(format & AF_FORMAT_PLANAR);
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}
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const struct af_fmt_entry af_fmtstr_table[] = {
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{"u8", AF_FORMAT_U8},
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{"s8", AF_FORMAT_S8},
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{"u16", AF_FORMAT_U16},
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{"s16", AF_FORMAT_S16},
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{"u24", AF_FORMAT_U24},
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{"s24", AF_FORMAT_S24},
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{"u32", AF_FORMAT_U32},
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{"s32", AF_FORMAT_S32},
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{"float", AF_FORMAT_FLOAT},
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{"double", AF_FORMAT_DOUBLE},
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{"u8p", AF_FORMAT_U8P},
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{"s16p", AF_FORMAT_S16P},
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{"s32p", AF_FORMAT_S32P},
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{"floatp", AF_FORMAT_FLOATP},
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{"doublep", AF_FORMAT_DOUBLEP},
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{"spdif-aac", AF_FORMAT_S_AAC},
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{"spdif-ac3", AF_FORMAT_S_AC3},
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{"spdif-dts", AF_FORMAT_S_DTS},
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{"spdif-dtshd", AF_FORMAT_S_DTSHD},
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{"spdif-eac3", AF_FORMAT_S_EAC3},
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{"spdif-mp3", AF_FORMAT_S_MP3},
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{"spdif-truehd",AF_FORMAT_S_TRUEHD},
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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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assert(!af_fmt_is_planar(format));
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int bps = af_fmt2bps(format);
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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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void af_fill_silence(void *dst, size_t bytes, int format)
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{
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bool us = (format & AF_FORMAT_SIGN_MASK) == AF_FORMAT_US;
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memset(dst, us ? 0x80 : 0, bytes);
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}
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#define FMT_DIFF(type, a, b) (((a) & type) - ((b) & type))
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// Returns a "score" that serves as heuristic how lossy or hard a conversion is.
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// If the formats are equal, 1024 is returned. If they are gravely incompatible
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// (like s16<->ac3), INT_MIN is returned. If there is implied loss of precision
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// (like s16->s8), a value <0 is returned.
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int af_format_conversion_score(int dst_format, int src_format)
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{
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if (dst_format == AF_FORMAT_UNKNOWN || src_format == AF_FORMAT_UNKNOWN)
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return INT_MIN;
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if (dst_format == src_format)
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return 1024;
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// Can't be normally converted
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if (AF_FORMAT_IS_SPECIAL(dst_format) || AF_FORMAT_IS_SPECIAL(src_format))
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return INT_MIN;
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int score = 1024;
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if (FMT_DIFF(AF_FORMAT_INTERLEAVING_MASK, dst_format, src_format))
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score -= 1; // has to (de-)planarize
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if (FMT_DIFF(AF_FORMAT_SIGN_MASK, dst_format, src_format))
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score -= 4; // has to swap sign
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if (FMT_DIFF(AF_FORMAT_TYPE_MASK, dst_format, src_format)) {
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int dst_bits = dst_format & AF_FORMAT_BITS_MASK;
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if ((dst_format & AF_FORMAT_TYPE_MASK) == AF_FORMAT_F) {
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// For int->float, always prefer 32 bit float.
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score -= dst_bits == AF_FORMAT_32BIT ? 8 : 0;
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} else {
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// For float->int, always prefer highest bit depth int
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score -= 8 * (AF_FORMAT_64BIT - dst_bits);
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}
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} else {
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int bits = FMT_DIFF(AF_FORMAT_BITS_MASK, dst_format, src_format);
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if (bits > 0) {
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score -= 8 * bits; // has to add padding
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} else if (bits < 0) {
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score -= 1024 - 8 * bits; // has to reduce bit depth
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}
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}
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// Consider this the worst case.
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if (FMT_DIFF(AF_FORMAT_TYPE_MASK, dst_format, src_format))
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score -= 2048; // has to convert float<->int
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return score;
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}
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// Return the number of samples that make up one frame in this format.
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// You get the byte size by multiplying them with sample size and channel count.
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int af_format_sample_alignment(int format)
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{
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switch (format) {
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case AF_FORMAT_S_AAC: return 16384 / 4;
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case AF_FORMAT_S_AC3: return 6144 / 4;
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case AF_FORMAT_S_DTSHD: return 32768 / 16;
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case AF_FORMAT_S_DTS: return 2048 / 4;
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case AF_FORMAT_S_EAC3: return 24576 / 4;
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case AF_FORMAT_S_MP3: return 4608 / 4;
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case AF_FORMAT_S_TRUEHD: return 61440 / 16;
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default: return 1;
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}
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}
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