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https://github.com/mpv-player/mpv
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31a10f7c38
In most places where af_fmt2bits is called to get the bits/sample, the result is immediately converted to bytes/sample. Avoid this by getting bytes/sample directly by introducing af_fmt2bps.
172 lines
6.6 KiB
C
172 lines
6.6 KiB
C
/*
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* The sample format system used lin libaf is based on bitmasks.
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* The format definition only refers to the storage format,
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* not the resolution.
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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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#ifndef MPLAYER_AF_FORMAT_H
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#define MPLAYER_AF_FORMAT_H
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#include <stdbool.h>
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#include <sys/types.h>
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#include "bstr/bstr.h"
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#if BYTE_ORDER == BIG_ENDIAN
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#define AF_SELECT_LE_BE(LE, BE) BE
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#else
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#define AF_SELECT_LE_BE(LE, BE) LE
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#endif
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// Endianness
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#define AF_FORMAT_BE (0<<0) // Big Endian
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#define AF_FORMAT_LE (1<<0) // Little Endian
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#define AF_FORMAT_END_MASK (1<<0)
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#define AF_FORMAT_NE AF_SELECT_LE_BE(AF_FORMAT_LE, AF_FORMAT_BE)
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// Signed/unsigned
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#define AF_FORMAT_SI (0<<1) // Signed
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#define AF_FORMAT_US (1<<1) // Unsigned
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#define AF_FORMAT_SIGN_MASK (1<<1)
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// Bits used
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// Some code assumes they're sorted by size.
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#define AF_FORMAT_8BIT (0<<3)
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#define AF_FORMAT_16BIT (1<<3)
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#define AF_FORMAT_24BIT (2<<3)
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#define AF_FORMAT_32BIT (3<<3)
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#define AF_FORMAT_64BIT (4<<3)
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#define AF_FORMAT_BITS_MASK (7<<3)
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// Special flags refering to non pcm data (note: 1<<6, 2<<6, 5<<6 unused)
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#define AF_FORMAT_S_MPEG2 (3<<6) // MPEG(2) audio
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#define AF_FORMAT_S_AC3 (4<<6) // Dolby Digital AC3
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#define AF_FORMAT_S_IEC61937 (6<<6)
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#define AF_FORMAT_SPECIAL_MASK (7<<6)
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// Fixed or floating point
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#define AF_FORMAT_I (1<<9) // Int
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#define AF_FORMAT_F (2<<9) // Foating point
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#define AF_FORMAT_POINT_MASK (3<<9)
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// Interleaving (planar formats have data for each channel in separate planes)
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#define AF_FORMAT_INTERLEAVED (0<<11) // must be 0
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#define AF_FORMAT_PLANAR (1<<11)
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#define AF_FORMAT_INTERLEAVING_MASK (1<<11)
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#define AF_FORMAT_MASK ((1<<12)-1)
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#define AF_INTP (AF_FORMAT_I|AF_FORMAT_PLANAR)
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#define AF_FLTP (AF_FORMAT_F|AF_FORMAT_PLANAR)
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// actual sample formats
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enum af_format {
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AF_FORMAT_UNKNOWN = 0,
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AF_FORMAT_U8 = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_8BIT|AF_FORMAT_NE),
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AF_FORMAT_S8 = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_8BIT|AF_FORMAT_NE),
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AF_FORMAT_U16_LE = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_16BIT|AF_FORMAT_LE),
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AF_FORMAT_U16_BE = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_16BIT|AF_FORMAT_BE),
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AF_FORMAT_S16_LE = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_16BIT|AF_FORMAT_LE),
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AF_FORMAT_S16_BE = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_16BIT|AF_FORMAT_BE),
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AF_FORMAT_U24_LE = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_24BIT|AF_FORMAT_LE),
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AF_FORMAT_U24_BE = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_24BIT|AF_FORMAT_BE),
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AF_FORMAT_S24_LE = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_24BIT|AF_FORMAT_LE),
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AF_FORMAT_S24_BE = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_24BIT|AF_FORMAT_BE),
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AF_FORMAT_U32_LE = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_32BIT|AF_FORMAT_LE),
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AF_FORMAT_U32_BE = (AF_FORMAT_I|AF_FORMAT_US|AF_FORMAT_32BIT|AF_FORMAT_BE),
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AF_FORMAT_S32_LE = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_32BIT|AF_FORMAT_LE),
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AF_FORMAT_S32_BE = (AF_FORMAT_I|AF_FORMAT_SI|AF_FORMAT_32BIT|AF_FORMAT_BE),
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AF_FORMAT_FLOAT_LE = (AF_FORMAT_F|AF_FORMAT_32BIT|AF_FORMAT_LE),
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AF_FORMAT_FLOAT_BE = (AF_FORMAT_F|AF_FORMAT_32BIT|AF_FORMAT_BE),
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AF_FORMAT_DOUBLE_LE = (AF_FORMAT_F|AF_FORMAT_64BIT|AF_FORMAT_LE),
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AF_FORMAT_DOUBLE_BE = (AF_FORMAT_F|AF_FORMAT_64BIT|AF_FORMAT_BE),
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AF_FORMAT_AC3_LE = (AF_FORMAT_S_AC3|AF_FORMAT_16BIT|AF_FORMAT_LE),
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AF_FORMAT_AC3_BE = (AF_FORMAT_S_AC3|AF_FORMAT_16BIT|AF_FORMAT_BE),
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AF_FORMAT_IEC61937_LE = (AF_FORMAT_S_IEC61937|AF_FORMAT_16BIT|AF_FORMAT_LE),
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AF_FORMAT_IEC61937_BE = (AF_FORMAT_S_IEC61937|AF_FORMAT_16BIT|AF_FORMAT_BE),
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AF_FORMAT_MPEG2 = (AF_FORMAT_S_MPEG2),
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// Planar variants
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AF_FORMAT_U8P = (AF_INTP|AF_FORMAT_US|AF_FORMAT_8BIT|AF_FORMAT_NE),
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AF_FORMAT_S16P = (AF_INTP|AF_FORMAT_SI|AF_FORMAT_16BIT|AF_FORMAT_NE),
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AF_FORMAT_S32P = (AF_INTP|AF_FORMAT_SI|AF_FORMAT_32BIT|AF_FORMAT_NE),
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AF_FORMAT_FLOATP = (AF_FLTP|AF_FORMAT_32BIT|AF_FORMAT_NE),
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AF_FORMAT_DOUBLEP = (AF_FLTP|AF_FORMAT_64BIT|AF_FORMAT_NE),
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// Native endian variants
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AF_FORMAT_U16 = AF_SELECT_LE_BE(AF_FORMAT_U16_LE, AF_FORMAT_U16_BE),
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AF_FORMAT_S16 = AF_SELECT_LE_BE(AF_FORMAT_S16_LE, AF_FORMAT_S16_BE),
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AF_FORMAT_U24 = AF_SELECT_LE_BE(AF_FORMAT_U24_LE, AF_FORMAT_U24_BE),
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AF_FORMAT_S24 = AF_SELECT_LE_BE(AF_FORMAT_S24_LE, AF_FORMAT_S24_BE),
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AF_FORMAT_U32 = AF_SELECT_LE_BE(AF_FORMAT_U32_LE, AF_FORMAT_U32_BE),
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AF_FORMAT_S32 = AF_SELECT_LE_BE(AF_FORMAT_S32_LE, AF_FORMAT_S32_BE),
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AF_FORMAT_FLOAT = AF_SELECT_LE_BE(AF_FORMAT_FLOAT_LE, AF_FORMAT_FLOAT_BE),
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AF_FORMAT_DOUBLE = AF_SELECT_LE_BE(AF_FORMAT_DOUBLE_LE, AF_FORMAT_DOUBLE_BE),
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AF_FORMAT_AC3 = AF_SELECT_LE_BE(AF_FORMAT_AC3_LE, AF_FORMAT_AC3_BE),
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AF_FORMAT_IEC61937 = AF_SELECT_LE_BE(AF_FORMAT_IEC61937_LE, AF_FORMAT_IEC61937_BE),
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};
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#define AF_FORMAT_IS_AC3(fmt) \
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(((fmt) & AF_FORMAT_SPECIAL_MASK) == AF_FORMAT_S_AC3)
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#define AF_FORMAT_IS_IEC61937(fmt) \
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(AF_FORMAT_IS_AC3(fmt) || \
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((fmt) & AF_FORMAT_SPECIAL_MASK) == AF_FORMAT_S_IEC61937)
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#define AF_FORMAT_IS_SPECIAL(fmt) \
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((fmt & AF_FORMAT_SPECIAL_MASK) != 0)
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struct af_fmt_entry {
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const char *name;
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int format;
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};
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extern const struct af_fmt_entry af_fmtstr_table[];
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int af_str2fmt_short(bstr str);
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const char *af_fmt_to_str(int format);
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int af_fmt2bps(int format);
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int af_fmt2bits(int format);
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int af_fmt_change_bits(int format, int bits);
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int af_fmt_to_planar(int format);
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int af_fmt_from_planar(int format);
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bool af_fmt_is_planar(int format);
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// Amount of bytes that contain audio of the given duration, aligned to frames.
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int af_fmt_seconds_to_bytes(int format, float seconds, int channels, int samplerate);
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bool af_fmt_is_valid(int format);
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void af_fill_silence(void *dst, size_t bytes, int format);
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int af_format_conversion_score(int dst_format, int src_format);
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#endif /* MPLAYER_AF_FORMAT_H */
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