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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MP_CHMAP_H
#define MP_CHMAP_H
#include <inttypes.h>
#include <stdbool.h>
#include "misc/bstr.h"
#define MP_NUM_CHANNELS 16
// Speaker a channel can be assigned to.
// This corresponds to WAVEFORMATEXTENSIBLE channel mask bit indexes.
// E.g. channel_mask = (1 << MP_SPEAKER_ID_FL) | ...
enum mp_speaker_id {
// Official WAVEFORMATEXTENSIBLE (shortened names)
MP_SPEAKER_ID_FL = 0, // FRONT_LEFT
MP_SPEAKER_ID_FR, // FRONT_RIGHT
MP_SPEAKER_ID_FC, // FRONT_CENTER
MP_SPEAKER_ID_LFE, // LOW_FREQUENCY
MP_SPEAKER_ID_BL, // BACK_LEFT
MP_SPEAKER_ID_BR, // BACK_RIGHT
MP_SPEAKER_ID_FLC, // FRONT_LEFT_OF_CENTER
MP_SPEAKER_ID_FRC, // FRONT_RIGHT_OF_CENTER
MP_SPEAKER_ID_BC, // BACK_CENTER
MP_SPEAKER_ID_SL, // SIDE_LEFT
MP_SPEAKER_ID_SR, // SIDE_RIGHT
MP_SPEAKER_ID_TC, // TOP_CENTER
MP_SPEAKER_ID_TFL, // TOP_FRONT_LEFT
MP_SPEAKER_ID_TFC, // TOP_FRONT_CENTER
MP_SPEAKER_ID_TFR, // TOP_FRONT_RIGHT
MP_SPEAKER_ID_TBL, // TOP_BACK_LEFT
MP_SPEAKER_ID_TBC, // TOP_BACK_CENTER
MP_SPEAKER_ID_TBR, // TOP_BACK_RIGHT
// Unofficial/libav* extensions
MP_SPEAKER_ID_DL = 29, // STEREO_LEFT (stereo downmix special speakers)
MP_SPEAKER_ID_DR, // STEREO_RIGHT
MP_SPEAKER_ID_WL, // WIDE_LEFT
MP_SPEAKER_ID_WR, // WIDE_RIGHT
MP_SPEAKER_ID_SDL, // SURROUND_DIRECT_LEFT
MP_SPEAKER_ID_SDR, // SURROUND_DIRECT_RIGHT
MP_SPEAKER_ID_LFE2, // LOW_FREQUENCY_2
// Speaker IDs >= 64 are not representable in WAVEFORMATEXTENSIBLE or libav*.
// "Silent" channels. These are sometimes used to insert padding for
// unused channels. Unlike other speaker types, multiple of these can
// occur in a single mp_chmap.
MP_SPEAKER_ID_NA = 64,
// Including the unassigned IDs in between. This is not a valid ID anymore,
// but is still within uint8_t.
MP_SPEAKER_ID_COUNT,
};
struct mp_chmap {
uint8_t num; // number of channels
// Given a channel n, speaker[n] is the speaker ID driven by that channel.
// Entries after speaker[num - 1] are undefined.
uint8_t speaker[MP_NUM_CHANNELS];
};
#define MP_SP(speaker) MP_SPEAKER_ID_ ## speaker
#define MP_CHMAP2(a, b) \
{2, {MP_SP(a), MP_SP(b)}}
#define MP_CHMAP3(a, b, c) \
{3, {MP_SP(a), MP_SP(b), MP_SP(c)}}
#define MP_CHMAP4(a, b, c, d) \
{4, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d)}}
#define MP_CHMAP5(a, b, c, d, e) \
{5, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e)}}
#define MP_CHMAP6(a, b, c, d, e, f) \
{6, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e), MP_SP(f)}}
#define MP_CHMAP7(a, b, c, d, e, f, g) \
{7, {MP_SP(a), MP_SP(b), MP_SP(c), MP_SP(d), MP_SP(e), MP_SP(f), MP_SP(g)}}
#define MP_CHMAP8(a, b, c, d, e, f, g, h) \
{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)}}
#define MP_CHMAP_INIT_MONO {1, {MP_SPEAKER_ID_FC}}
#define MP_CHMAP_INIT_STEREO MP_CHMAP2(FL, FR)
bool mp_chmap_is_valid(const struct mp_chmap *src);
bool mp_chmap_is_empty(const struct mp_chmap *src);
bool mp_chmap_is_unknown(const struct mp_chmap *src);
bool mp_chmap_equals(const struct mp_chmap *a, const struct mp_chmap *b);
bool mp_chmap_equals_reordered(const struct mp_chmap *a, const struct mp_chmap *b);
bool mp_chmap_is_stereo(const struct mp_chmap *src);
void mp_chmap_reorder_norm(struct mp_chmap *map);
void mp_chmap_remove_na(struct mp_chmap *map);
void mp_chmap_fill_na(struct mp_chmap *map, int num);
void mp_chmap_from_channels(struct mp_chmap *dst, int num_channels);
void mp_chmap_set_unknown(struct mp_chmap *dst, int num_channels);
void mp_chmap_remove_useless_channels(struct mp_chmap *map,
const struct mp_chmap *requested);
uint64_t mp_chmap_to_lavc(const struct mp_chmap *src);
uint64_t mp_chmap_to_lavc_unchecked(const struct mp_chmap *src);
void mp_chmap_from_lavc(struct mp_chmap *dst, uint64_t src);
bool mp_chmap_is_lavc(const struct mp_chmap *src);
void mp_chmap_reorder_to_lavc(struct mp_chmap *map);
void mp_chmap_get_reorder(int src[MP_NUM_CHANNELS], const struct mp_chmap *from,
const struct mp_chmap *to);
int mp_chmap_diffn(const struct mp_chmap *a, const struct mp_chmap *b);
char *mp_chmap_to_str_buf(char *buf, size_t buf_size, const struct mp_chmap *src);
#define mp_chmap_to_str(m) mp_chmap_to_str_buf((char[64]){0}, 64, (m))
char *mp_chmap_to_str_hr_buf(char *buf, size_t buf_size, const struct mp_chmap *src);
#define mp_chmap_to_str_hr(m) mp_chmap_to_str_hr_buf((char[128]){0}, 128, (m))
bool mp_chmap_from_str(struct mp_chmap *dst, bstr src);
struct mp_log;
void mp_chmap_print_help(struct mp_log *log);
// Use these to avoid chaos in case lavc's definition should diverge from MS.
#define mp_chmap_to_waveext mp_chmap_to_lavc
#define mp_chmap_from_waveext mp_chmap_from_lavc
#define mp_chmap_is_waveext mp_chmap_is_lavc
#define mp_chmap_reorder_to_waveext mp_chmap_reorder_to_lavc
#endif
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