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efb50cabe6
Audio formats used a semi-clever schema to encode the properties of the PCM encoding as bitfields into the format integer value. The af_fmt_change_bits() implementation becomes a bit weird, but it's an improvement to the rest of the code. (I've always disliked it, so why not get rid of it.)
98 lines
2.5 KiB
C
98 lines
2.5 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 mpv.
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*
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* mpv 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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* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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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 "misc/bstr.h"
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enum af_format {
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AF_FORMAT_UNKNOWN = 0,
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AF_FORMAT_U8,
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AF_FORMAT_S16,
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AF_FORMAT_S24,
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AF_FORMAT_S32,
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AF_FORMAT_FLOAT,
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AF_FORMAT_DOUBLE,
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// Planar variants
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AF_FORMAT_U8P,
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AF_FORMAT_S16P,
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AF_FORMAT_S32P,
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AF_FORMAT_FLOATP,
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AF_FORMAT_DOUBLEP,
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// All of these use IEC61937 framing, and otherwise pretend to be like PCM.
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AF_FORMAT_S_AAC,
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AF_FORMAT_S_AC3,
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AF_FORMAT_S_DTS,
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AF_FORMAT_S_DTSHD,
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AF_FORMAT_S_EAC3,
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AF_FORMAT_S_MP3,
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AF_FORMAT_S_TRUEHD,
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AF_FORMAT_COUNT
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};
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#define AF_FORMAT_IS_IEC61937(f) af_fmt_is_spdif(f)
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#define AF_FORMAT_IS_SPECIAL(f) af_fmt_is_spdif(f)
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#define AF_FORMAT_IS_FLOAT(f) af_fmt_is_float(f)
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#define AF_FORMAT_IS_PLANAR(f) af_fmt_is_planar(f)
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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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bool af_fmt_unsigned(int format);
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bool af_fmt_is_float(int format);
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bool af_fmt_is_int(int format);
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bool af_fmt_is_planar(int format);
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bool af_fmt_is_spdif(int format);
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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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// 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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int af_format_sample_alignment(int format);
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#endif /* MPLAYER_AF_FORMAT_H */
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