mirror of https://github.com/mpv-player/mpv
164 lines
6.5 KiB
C
164 lines
6.5 KiB
C
/*
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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
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MP_CHMAP_H
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#define MP_CHMAP_H
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#include <inttypes.h>
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#include <stdbool.h>
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#include "misc/bstr.h"
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#define MP_NUM_CHANNELS 64
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// Speaker a channel can be assigned to.
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// This corresponds to WAVEFORMATEXTENSIBLE channel mask bit indexes.
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// E.g. channel_mask = (1 << MP_SPEAKER_ID_FL) | ...
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enum mp_speaker_id {
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// Official WAVEFORMATEXTENSIBLE (shortened names)
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MP_SPEAKER_ID_FL = 0, // FRONT_LEFT
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MP_SPEAKER_ID_FR, // FRONT_RIGHT
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MP_SPEAKER_ID_FC, // FRONT_CENTER
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MP_SPEAKER_ID_LFE, // LOW_FREQUENCY
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MP_SPEAKER_ID_BL, // BACK_LEFT
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MP_SPEAKER_ID_BR, // BACK_RIGHT
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MP_SPEAKER_ID_FLC, // FRONT_LEFT_OF_CENTER
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MP_SPEAKER_ID_FRC, // FRONT_RIGHT_OF_CENTER
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MP_SPEAKER_ID_BC, // BACK_CENTER
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MP_SPEAKER_ID_SL, // SIDE_LEFT
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MP_SPEAKER_ID_SR, // SIDE_RIGHT
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MP_SPEAKER_ID_TC, // TOP_CENTER
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MP_SPEAKER_ID_TFL, // TOP_FRONT_LEFT
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MP_SPEAKER_ID_TFC, // TOP_FRONT_CENTER
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MP_SPEAKER_ID_TFR, // TOP_FRONT_RIGHT
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MP_SPEAKER_ID_TBL, // TOP_BACK_LEFT
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MP_SPEAKER_ID_TBC, // TOP_BACK_CENTER
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MP_SPEAKER_ID_TBR, // TOP_BACK_RIGHT
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// Unofficial/libav* extensions
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MP_SPEAKER_ID_DL = 29, // STEREO_LEFT (stereo downmix special speakers)
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MP_SPEAKER_ID_DR, // STEREO_RIGHT
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MP_SPEAKER_ID_WL, // WIDE_LEFT
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MP_SPEAKER_ID_WR, // WIDE_RIGHT
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MP_SPEAKER_ID_SDL, // SURROUND_DIRECT_LEFT
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MP_SPEAKER_ID_SDR, // SURROUND_DIRECT_RIGHT
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MP_SPEAKER_ID_LFE2, // LOW_FREQUENCY_2
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MP_SPEAKER_ID_TSL, // TOP_SIDE_LEFT
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MP_SPEAKER_ID_TSR, // TOP_SIDE_RIGHT,
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MP_SPEAKER_ID_BFC, // BOTTOM_FRONT_CENTER
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MP_SPEAKER_ID_BFL, // BOTTOM_FRONT_LEFT
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MP_SPEAKER_ID_BFR, // BOTTOM_FRONT_RIGHT
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// Speaker IDs >= 64 are not representable in WAVEFORMATEXTENSIBLE or libav*.
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// "Silent" channels. These are sometimes used to insert padding for
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// unused channels. Unlike other speaker types, multiple of these can
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// occur in a single mp_chmap.
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MP_SPEAKER_ID_NA = 64,
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// Including the unassigned IDs in between. This is not a valid ID anymore,
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// but is still within uint8_t.
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MP_SPEAKER_ID_COUNT,
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};
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struct mp_chmap {
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uint8_t num; // number of channels
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// Given a channel n, speaker[n] is the speaker ID driven by that channel.
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// Entries after speaker[num - 1] are undefined.
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uint8_t speaker[MP_NUM_CHANNELS];
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};
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typedef const char * const (mp_ch_layout_tuple)[2];
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#define MP_SP(speaker) MP_SPEAKER_ID_ ## speaker
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#define MP_CHMAP2(a, b) \
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{2, {MP_SP(a), MP_SP(b)}}
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#define MP_CHMAP3(a, b, c) \
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{3, {MP_SP(a), MP_SP(b), MP_SP(c)}}
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#define MP_CHMAP4(a, b, c, d) \
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{4, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d)}}
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#define MP_CHMAP5(a, b, c, d, e) \
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{5, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e)}}
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#define MP_CHMAP6(a, b, c, d, e, f) \
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{6, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e), MP_SP(f)}}
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#define MP_CHMAP7(a, b, c, d, e, f, g) \
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{7, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e), MP_SP(f), MP_SP(g)}}
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#define MP_CHMAP8(a, b, c, d, e, f, g, h) \
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{8, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e), MP_SP(f), MP_SP(g), MP_SP(h)}}
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#define MP_CHMAP_INIT_MONO {1, {MP_SPEAKER_ID_FC}}
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#define MP_CHMAP_INIT_STEREO MP_CHMAP2(FL, FR)
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bool mp_chmap_is_valid(const struct mp_chmap *src);
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bool mp_chmap_is_empty(const struct mp_chmap *src);
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bool mp_chmap_is_unknown(const struct mp_chmap *src);
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bool mp_chmap_equals(const struct mp_chmap *a, const struct mp_chmap *b);
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bool mp_chmap_equals_reordered(const struct mp_chmap *a, const struct mp_chmap *b);
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bool mp_chmap_is_stereo(const struct mp_chmap *src);
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void mp_chmap_reorder_norm(struct mp_chmap *map);
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void mp_chmap_remove_na(struct mp_chmap *map);
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void mp_chmap_fill_na(struct mp_chmap *map, int num);
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void mp_chmap_from_channels(struct mp_chmap *dst, int num_channels);
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void mp_chmap_set_unknown(struct mp_chmap *dst, int num_channels);
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uint64_t mp_chmap_to_lavc(const struct mp_chmap *src);
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uint64_t mp_chmap_to_lavc_unchecked(const struct mp_chmap *src);
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void mp_chmap_from_lavc(struct mp_chmap *dst, uint64_t src);
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bool mp_chmap_is_lavc(const struct mp_chmap *src);
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void mp_chmap_reorder_to_lavc(struct mp_chmap *map);
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void mp_chmap_get_reorder(int src[MP_NUM_CHANNELS], const struct mp_chmap *from,
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const struct mp_chmap *to);
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int mp_chmap_diffn(const struct mp_chmap *a, const struct mp_chmap *b);
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char *mp_chmap_to_str_buf(char *buf, size_t buf_size, const struct mp_chmap *src);
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#define mp_chmap_to_str_(m, sz) mp_chmap_to_str_buf((char[sz]){0}, sz, (m))
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#define mp_chmap_to_str(m) mp_chmap_to_str_(m, MP_NUM_CHANNELS * 4)
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char *mp_chmap_to_str_hr_buf(char *buf, size_t buf_size, const struct mp_chmap *src);
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#define mp_chmap_to_str_hr_(m, sz) mp_chmap_to_str_hr_buf((char[sz]){0}, sz, (m))
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#define mp_chmap_to_str_hr(m) mp_chmap_to_str_hr_(m, MP_NUM_CHANNELS * 4)
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bool mp_chmap_from_str(struct mp_chmap *dst, bstr src);
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/**
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* Iterate over all built-in channel layouts which have mapped channels.
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*
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* @param opaque a pointer where the iteration state is stored. Must point
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* to nullptr to start the iteration.
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*
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* @return nullptr when the iteration is finished.
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* Otherwise a pointer to an array of two char pointers.
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* - [0] being the human-readable layout name.
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* - [1] being the string representation of the layout.
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*/
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mp_ch_layout_tuple *mp_iterate_builtin_layouts(void **opaque);
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struct mp_log;
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void mp_chmap_print_help(struct mp_log *log);
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// Use these to avoid chaos in case lavc's definition should diverge from MS.
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#define mp_chmap_to_waveext mp_chmap_to_lavc
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#define mp_chmap_from_waveext mp_chmap_from_lavc
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#define mp_chmap_is_waveext mp_chmap_is_lavc
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#define mp_chmap_reorder_to_waveext mp_chmap_reorder_to_lavc
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#endif
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