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https://gitlab.freedesktop.org/pipewire/pipewire.git
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6e6385e27d
When filling up the channels, either fill up the positions with one of the know layouts or use AUX channels, never try to mix them. This avoid cards with a large number channels to show a strange mix of surround and AUX channels.
476 lines
18 KiB
C
476 lines
18 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef PULSE_CHANNELMAP_H
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#define PULSE_CHANNELMAP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "spa/utils/defs.h"
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#define PA_CHANNELS_MAX 64
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#define PA_CHANNEL_MAP_SNPRINT_MAX (PA_CHANNELS_MAX * 32)
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typedef enum pa_channel_map_def {
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PA_CHANNEL_MAP_AIFF,
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PA_CHANNEL_MAP_ALSA,
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PA_CHANNEL_MAP_AUX,
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PA_CHANNEL_MAP_WAVEEX,
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PA_CHANNEL_MAP_OSS,
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PA_CHANNEL_MAP_DEF_MAX,
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PA_CHANNEL_MAP_DEFAULT = PA_CHANNEL_MAP_AIFF
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} pa_channel_map_def_t;
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typedef enum pa_channel_position {
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PA_CHANNEL_POSITION_INVALID = -1,
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PA_CHANNEL_POSITION_MONO = 0,
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PA_CHANNEL_POSITION_FRONT_LEFT, /**< Apple, Dolby call this 'Left' */
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PA_CHANNEL_POSITION_FRONT_RIGHT, /**< Apple, Dolby call this 'Right' */
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PA_CHANNEL_POSITION_FRONT_CENTER, /**< Apple, Dolby call this 'Center' */
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/** \cond fulldocs */
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PA_CHANNEL_POSITION_LEFT = PA_CHANNEL_POSITION_FRONT_LEFT,
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PA_CHANNEL_POSITION_RIGHT = PA_CHANNEL_POSITION_FRONT_RIGHT,
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PA_CHANNEL_POSITION_CENTER = PA_CHANNEL_POSITION_FRONT_CENTER,
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/** \endcond */
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PA_CHANNEL_POSITION_REAR_CENTER, /**< Microsoft calls this 'Back Center', Apple calls this 'Center Surround', Dolby calls this 'Surround Rear Center' */
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PA_CHANNEL_POSITION_REAR_LEFT, /**< Microsoft calls this 'Back Left', Apple calls this 'Left Surround' (!), Dolby calls this 'Surround Rear Left' */
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PA_CHANNEL_POSITION_REAR_RIGHT, /**< Microsoft calls this 'Back Right', Apple calls this 'Right Surround' (!), Dolby calls this 'Surround Rear Right' */
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PA_CHANNEL_POSITION_LFE, /**< Microsoft calls this 'Low Frequency', Apple calls this 'LFEScreen' */
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/** \cond fulldocs */
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PA_CHANNEL_POSITION_SUBWOOFER = PA_CHANNEL_POSITION_LFE,
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/** \endcond */
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PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, /**< Apple, Dolby call this 'Left Center' */
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PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, /**< Apple, Dolby call this 'Right Center */
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PA_CHANNEL_POSITION_SIDE_LEFT, /**< Apple calls this 'Left Surround Direct', Dolby calls this 'Surround Left' (!) */
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PA_CHANNEL_POSITION_SIDE_RIGHT, /**< Apple calls this 'Right Surround Direct', Dolby calls this 'Surround Right' (!) */
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PA_CHANNEL_POSITION_AUX0,
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PA_CHANNEL_POSITION_AUX1,
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PA_CHANNEL_POSITION_AUX2,
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PA_CHANNEL_POSITION_AUX3,
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PA_CHANNEL_POSITION_AUX4,
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PA_CHANNEL_POSITION_AUX5,
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PA_CHANNEL_POSITION_AUX6,
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PA_CHANNEL_POSITION_AUX7,
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PA_CHANNEL_POSITION_AUX8,
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PA_CHANNEL_POSITION_AUX9,
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PA_CHANNEL_POSITION_AUX10,
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PA_CHANNEL_POSITION_AUX11,
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PA_CHANNEL_POSITION_AUX12,
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PA_CHANNEL_POSITION_AUX13,
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PA_CHANNEL_POSITION_AUX14,
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PA_CHANNEL_POSITION_AUX15,
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PA_CHANNEL_POSITION_AUX16,
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PA_CHANNEL_POSITION_AUX17,
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PA_CHANNEL_POSITION_AUX18,
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PA_CHANNEL_POSITION_AUX19,
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PA_CHANNEL_POSITION_AUX20,
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PA_CHANNEL_POSITION_AUX21,
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PA_CHANNEL_POSITION_AUX22,
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PA_CHANNEL_POSITION_AUX23,
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PA_CHANNEL_POSITION_AUX24,
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PA_CHANNEL_POSITION_AUX25,
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PA_CHANNEL_POSITION_AUX26,
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PA_CHANNEL_POSITION_AUX27,
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PA_CHANNEL_POSITION_AUX28,
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PA_CHANNEL_POSITION_AUX29,
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PA_CHANNEL_POSITION_AUX30,
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PA_CHANNEL_POSITION_AUX31,
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PA_CHANNEL_POSITION_TOP_CENTER, /**< Apple calls this 'Top Center Surround' */
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PA_CHANNEL_POSITION_TOP_FRONT_LEFT, /**< Apple calls this 'Vertical Height Left' */
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PA_CHANNEL_POSITION_TOP_FRONT_RIGHT, /**< Apple calls this 'Vertical Height Right' */
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PA_CHANNEL_POSITION_TOP_FRONT_CENTER, /**< Apple calls this 'Vertical Height Center' */
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PA_CHANNEL_POSITION_TOP_REAR_LEFT, /**< Microsoft and Apple call this 'Top Back Left' */
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PA_CHANNEL_POSITION_TOP_REAR_RIGHT, /**< Microsoft and Apple call this 'Top Back Right' */
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PA_CHANNEL_POSITION_TOP_REAR_CENTER, /**< Microsoft and Apple call this 'Top Back Center' */
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PA_CHANNEL_POSITION_MAX
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} pa_channel_position_t;
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typedef struct pa_channel_map {
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uint8_t channels;
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pa_channel_position_t map[PA_CHANNELS_MAX];
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} pa_channel_map;
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static inline int pa_channels_valid(uint8_t channels)
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{
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return channels > 0 && channels <= PA_CHANNELS_MAX;
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}
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static inline int pa_channel_map_valid(const pa_channel_map *map)
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{
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unsigned c;
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if (!pa_channels_valid(map->channels))
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return 0;
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for (c = 0; c < map->channels; c++)
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if (map->map[c] < 0 || map->map[c] >= PA_CHANNEL_POSITION_MAX)
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return 0;
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return 1;
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}
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static inline pa_channel_map* pa_channel_map_init(pa_channel_map *m)
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{
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unsigned c;
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m->channels = 0;
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for (c = 0; c < PA_CHANNELS_MAX; c++)
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m->map[c] = PA_CHANNEL_POSITION_INVALID;
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return m;
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}
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static inline pa_channel_map* pa_channel_map_init_auto(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def)
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{
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unsigned i;
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pa_assert(m);
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pa_assert(pa_channels_valid(channels));
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pa_assert(def < PA_CHANNEL_MAP_DEF_MAX);
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pa_channel_map_init(m);
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m->channels = (uint8_t) channels;
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switch (def) {
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case PA_CHANNEL_MAP_ALSA:
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switch (channels) {
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case 1:
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m->map[0] = PA_CHANNEL_POSITION_MONO;
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return m;
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case 8:
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m->map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
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m->map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
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SPA_FALLTHROUGH;
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case 6:
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m->map[5] = PA_CHANNEL_POSITION_LFE;
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SPA_FALLTHROUGH;
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case 5:
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m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
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SPA_FALLTHROUGH;
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case 4:
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m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
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m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
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SPA_FALLTHROUGH;
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case 2:
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m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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return m;
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default:
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return NULL;
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}
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case PA_CHANNEL_MAP_AUX:
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for (i = 0; i < channels; i++)
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m->map[i] = PA_CHANNEL_POSITION_AUX0 + (i & 31);
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return m;
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default:
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break;
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}
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return NULL;
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}
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static inline pa_channel_map* pa_channel_map_init_extend(pa_channel_map *m,
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unsigned channels, pa_channel_map_def_t def)
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{
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pa_channel_map *r;
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if ((r = pa_channel_map_init_auto(m, channels, def)) != NULL)
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return r;
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return pa_channel_map_init_auto(m, channels, PA_CHANNEL_MAP_AUX);
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}
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typedef uint64_t pa_channel_position_mask_t;
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#define PA_CHANNEL_POSITION_MASK(f) ((pa_channel_position_mask_t) (1ULL << (f)))
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#define PA_CHANNEL_POSITION_MASK_LEFT \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT)) \
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#define PA_CHANNEL_POSITION_MASK_RIGHT \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT))
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#define PA_CHANNEL_POSITION_MASK_CENTER \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER))
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#define PA_CHANNEL_POSITION_MASK_FRONT \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER))
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#define PA_CHANNEL_POSITION_MASK_REAR \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER))
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#define PA_CHANNEL_POSITION_MASK_LFE \
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PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_LFE)
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#define PA_CHANNEL_POSITION_MASK_HFE \
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(PA_CHANNEL_POSITION_MASK_REAR | PA_CHANNEL_POSITION_MASK_FRONT \
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| PA_CHANNEL_POSITION_MASK_LEFT | PA_CHANNEL_POSITION_MASK_RIGHT \
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| PA_CHANNEL_POSITION_MASK_CENTER)
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#define PA_CHANNEL_POSITION_MASK_SIDE_OR_TOP_CENTER \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER))
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#define PA_CHANNEL_POSITION_MASK_TOP \
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(PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT) \
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| PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER))
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#define PA_CHANNEL_POSITION_MASK_ALL \
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((pa_channel_position_mask_t) (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_MAX)-1))
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static const char *const pa_position_table[PA_CHANNEL_POSITION_MAX] = {
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[PA_CHANNEL_POSITION_MONO] = "mono",
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[PA_CHANNEL_POSITION_FRONT_CENTER] = "front-center",
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[PA_CHANNEL_POSITION_FRONT_LEFT] = "front-left",
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[PA_CHANNEL_POSITION_FRONT_RIGHT] = "front-right",
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[PA_CHANNEL_POSITION_REAR_CENTER] = "rear-center",
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[PA_CHANNEL_POSITION_REAR_LEFT] = "rear-left",
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[PA_CHANNEL_POSITION_REAR_RIGHT] = "rear-right",
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[PA_CHANNEL_POSITION_LFE] = "lfe",
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[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "front-left-of-center",
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[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "front-right-of-center",
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[PA_CHANNEL_POSITION_SIDE_LEFT] = "side-left",
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[PA_CHANNEL_POSITION_SIDE_RIGHT] = "side-right",
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[PA_CHANNEL_POSITION_AUX0] = "aux0",
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[PA_CHANNEL_POSITION_AUX1] = "aux1",
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[PA_CHANNEL_POSITION_AUX2] = "aux2",
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[PA_CHANNEL_POSITION_AUX3] = "aux3",
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[PA_CHANNEL_POSITION_AUX4] = "aux4",
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[PA_CHANNEL_POSITION_AUX5] = "aux5",
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[PA_CHANNEL_POSITION_AUX6] = "aux6",
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[PA_CHANNEL_POSITION_AUX7] = "aux7",
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[PA_CHANNEL_POSITION_AUX8] = "aux8",
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[PA_CHANNEL_POSITION_AUX9] = "aux9",
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[PA_CHANNEL_POSITION_AUX10] = "aux10",
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[PA_CHANNEL_POSITION_AUX11] = "aux11",
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[PA_CHANNEL_POSITION_AUX12] = "aux12",
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[PA_CHANNEL_POSITION_AUX13] = "aux13",
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[PA_CHANNEL_POSITION_AUX14] = "aux14",
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[PA_CHANNEL_POSITION_AUX15] = "aux15",
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[PA_CHANNEL_POSITION_AUX16] = "aux16",
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[PA_CHANNEL_POSITION_AUX17] = "aux17",
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[PA_CHANNEL_POSITION_AUX18] = "aux18",
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[PA_CHANNEL_POSITION_AUX19] = "aux19",
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[PA_CHANNEL_POSITION_AUX20] = "aux20",
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[PA_CHANNEL_POSITION_AUX21] = "aux21",
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[PA_CHANNEL_POSITION_AUX22] = "aux22",
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[PA_CHANNEL_POSITION_AUX23] = "aux23",
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[PA_CHANNEL_POSITION_AUX24] = "aux24",
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[PA_CHANNEL_POSITION_AUX25] = "aux25",
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[PA_CHANNEL_POSITION_AUX26] = "aux26",
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[PA_CHANNEL_POSITION_AUX27] = "aux27",
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[PA_CHANNEL_POSITION_AUX28] = "aux28",
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[PA_CHANNEL_POSITION_AUX29] = "aux29",
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[PA_CHANNEL_POSITION_AUX30] = "aux30",
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[PA_CHANNEL_POSITION_AUX31] = "aux31",
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[PA_CHANNEL_POSITION_TOP_CENTER] = "top-center",
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[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center",
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[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left",
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[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right",
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[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center",
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[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left",
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[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right"
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};
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static inline pa_channel_position_t pa_channel_position_from_string(const char *p)
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{
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pa_channel_position_t i;
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/* Some special aliases */
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if (pa_streq(p, "left"))
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return PA_CHANNEL_POSITION_LEFT;
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else if (pa_streq(p, "right"))
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return PA_CHANNEL_POSITION_RIGHT;
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else if (pa_streq(p, "center"))
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return PA_CHANNEL_POSITION_CENTER;
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else if (pa_streq(p, "subwoofer"))
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return PA_CHANNEL_POSITION_SUBWOOFER;
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for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
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if (pa_streq(p, pa_position_table[i]))
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return i;
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return PA_CHANNEL_POSITION_INVALID;
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}
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static inline pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s)
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{
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const char *state;
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pa_channel_map map;
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char *p;
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pa_channel_map_init(&map);
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if (pa_streq(s, "stereo")) {
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map.channels = 2;
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map.map[0] = PA_CHANNEL_POSITION_LEFT;
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map.map[1] = PA_CHANNEL_POSITION_RIGHT;
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goto finish;
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} else if (pa_streq(s, "surround-21")) {
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map.channels = 3;
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map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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map.map[2] = PA_CHANNEL_POSITION_LFE;
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goto finish;
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} else if (pa_streq(s, "surround-40")) {
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map.channels = 4;
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map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
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map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
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goto finish;
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} else if (pa_streq(s, "surround-41")) {
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map.channels = 5;
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map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
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map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
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map.map[4] = PA_CHANNEL_POSITION_LFE;
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goto finish;
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} else if (pa_streq(s, "surround-50")) {
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map.channels = 5;
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map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
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map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
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map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
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goto finish;
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} else if (pa_streq(s, "surround-51")) {
|
|
map.channels = 6;
|
|
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
|
|
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
|
|
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
|
|
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
|
|
map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
|
|
map.map[5] = PA_CHANNEL_POSITION_LFE;
|
|
goto finish;
|
|
} else if (pa_streq(s, "surround-71")) {
|
|
map.channels = 8;
|
|
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
|
|
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
|
|
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
|
|
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
|
|
map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
|
|
map.map[5] = PA_CHANNEL_POSITION_LFE;
|
|
map.map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
|
|
map.map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
|
|
goto finish;
|
|
}
|
|
state = NULL;
|
|
map.channels = 0;
|
|
while ((p = pa_split(s, ",", &state))) {
|
|
pa_channel_position_t f;
|
|
|
|
if (map.channels >= PA_CHANNELS_MAX) {
|
|
pa_xfree(p);
|
|
return NULL;
|
|
}
|
|
if ((f = pa_channel_position_from_string(p)) == PA_CHANNEL_POSITION_INVALID) {
|
|
pa_xfree(p);
|
|
return NULL;
|
|
}
|
|
map.map[map.channels++] = f;
|
|
pa_xfree(p);
|
|
}
|
|
finish:
|
|
if (!pa_channel_map_valid(&map))
|
|
return NULL;
|
|
*rmap = map;
|
|
return rmap;
|
|
}
|
|
|
|
static inline const char* pa_channel_position_to_string(pa_channel_position_t pos) {
|
|
|
|
if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
|
|
return NULL;
|
|
return pa_position_table[pos];
|
|
}
|
|
|
|
static inline int pa_channel_map_equal(const pa_channel_map *a, const pa_channel_map *b)
|
|
{
|
|
unsigned c;
|
|
if (PA_UNLIKELY(a == b))
|
|
return 1;
|
|
if (a->channels != b->channels)
|
|
return 0;
|
|
for (c = 0; c < a->channels; c++)
|
|
if (a->map[c] != b->map[c])
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static inline char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
|
|
unsigned channel;
|
|
bool first = true;
|
|
char *e;
|
|
if (!pa_channel_map_valid(map)) {
|
|
pa_snprintf(s, l, "%s", _("(invalid)"));
|
|
return s;
|
|
}
|
|
*(e = s) = 0;
|
|
for (channel = 0; channel < map->channels && l > 1; channel++) {
|
|
l -= pa_snprintf(e, l, "%s%s",
|
|
first ? "" : ",",
|
|
pa_channel_position_to_string(map->map[channel]));
|
|
e = strchr(e, 0);
|
|
first = false;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* PULSE_CHANNELMAP_H */
|