diff options
Diffstat (limited to 'spa/plugins/alsa/acp/channelmap.h')
| -rw-r--r-- | spa/plugins/alsa/acp/channelmap.h | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/spa/plugins/alsa/acp/channelmap.h b/spa/plugins/alsa/acp/channelmap.h new file mode 100644 index 0000000..adb4868 --- /dev/null +++ b/spa/plugins/alsa/acp/channelmap.h @@ -0,0 +1,476 @@ +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB + + PulseAudio 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. + + PulseAudio 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 + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. +***/ + +#ifndef PULSE_CHANNELMAP_H +#define PULSE_CHANNELMAP_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "spa/utils/defs.h" + +#define PA_CHANNELS_MAX 64 + +#define PA_CHANNEL_MAP_SNPRINT_MAX (PA_CHANNELS_MAX * 32) + +typedef enum pa_channel_map_def { + PA_CHANNEL_MAP_AIFF, + PA_CHANNEL_MAP_ALSA, + PA_CHANNEL_MAP_AUX, + PA_CHANNEL_MAP_WAVEEX, + PA_CHANNEL_MAP_OSS, + PA_CHANNEL_MAP_DEF_MAX, + PA_CHANNEL_MAP_DEFAULT = PA_CHANNEL_MAP_AIFF +} pa_channel_map_def_t; + +typedef enum pa_channel_position { + PA_CHANNEL_POSITION_INVALID = -1, + PA_CHANNEL_POSITION_MONO = 0, + + PA_CHANNEL_POSITION_FRONT_LEFT, /**< Apple, Dolby call this 'Left' */ + PA_CHANNEL_POSITION_FRONT_RIGHT, /**< Apple, Dolby call this 'Right' */ + PA_CHANNEL_POSITION_FRONT_CENTER, /**< Apple, Dolby call this 'Center' */ + +/** \cond fulldocs */ + PA_CHANNEL_POSITION_LEFT = PA_CHANNEL_POSITION_FRONT_LEFT, + PA_CHANNEL_POSITION_RIGHT = PA_CHANNEL_POSITION_FRONT_RIGHT, + PA_CHANNEL_POSITION_CENTER = PA_CHANNEL_POSITION_FRONT_CENTER, +/** \endcond */ + + PA_CHANNEL_POSITION_REAR_CENTER, /**< Microsoft calls this 'Back Center', Apple calls this 'Center Surround', Dolby calls this 'Surround Rear Center' */ + PA_CHANNEL_POSITION_REAR_LEFT, /**< Microsoft calls this 'Back Left', Apple calls this 'Left Surround' (!), Dolby calls this 'Surround Rear Left' */ + PA_CHANNEL_POSITION_REAR_RIGHT, /**< Microsoft calls this 'Back Right', Apple calls this 'Right Surround' (!), Dolby calls this 'Surround Rear Right' */ + + PA_CHANNEL_POSITION_LFE, /**< Microsoft calls this 'Low Frequency', Apple calls this 'LFEScreen' */ +/** \cond fulldocs */ + PA_CHANNEL_POSITION_SUBWOOFER = PA_CHANNEL_POSITION_LFE, +/** \endcond */ + + PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, /**< Apple, Dolby call this 'Left Center' */ + PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, /**< Apple, Dolby call this 'Right Center */ + + PA_CHANNEL_POSITION_SIDE_LEFT, /**< Apple calls this 'Left Surround Direct', Dolby calls this 'Surround Left' (!) */ + PA_CHANNEL_POSITION_SIDE_RIGHT, /**< Apple calls this 'Right Surround Direct', Dolby calls this 'Surround Right' (!) */ + PA_CHANNEL_POSITION_AUX0, + PA_CHANNEL_POSITION_AUX1, + PA_CHANNEL_POSITION_AUX2, + PA_CHANNEL_POSITION_AUX3, + PA_CHANNEL_POSITION_AUX4, + PA_CHANNEL_POSITION_AUX5, + PA_CHANNEL_POSITION_AUX6, + PA_CHANNEL_POSITION_AUX7, + PA_CHANNEL_POSITION_AUX8, + PA_CHANNEL_POSITION_AUX9, + PA_CHANNEL_POSITION_AUX10, + PA_CHANNEL_POSITION_AUX11, + PA_CHANNEL_POSITION_AUX12, + PA_CHANNEL_POSITION_AUX13, + PA_CHANNEL_POSITION_AUX14, + PA_CHANNEL_POSITION_AUX15, + PA_CHANNEL_POSITION_AUX16, + PA_CHANNEL_POSITION_AUX17, + PA_CHANNEL_POSITION_AUX18, + PA_CHANNEL_POSITION_AUX19, + PA_CHANNEL_POSITION_AUX20, + PA_CHANNEL_POSITION_AUX21, + PA_CHANNEL_POSITION_AUX22, + PA_CHANNEL_POSITION_AUX23, + PA_CHANNEL_POSITION_AUX24, + PA_CHANNEL_POSITION_AUX25, + PA_CHANNEL_POSITION_AUX26, + PA_CHANNEL_POSITION_AUX27, + PA_CHANNEL_POSITION_AUX28, + PA_CHANNEL_POSITION_AUX29, + PA_CHANNEL_POSITION_AUX30, + PA_CHANNEL_POSITION_AUX31, + + PA_CHANNEL_POSITION_TOP_CENTER, /**< Apple calls this 'Top Center Surround' */ + + PA_CHANNEL_POSITION_TOP_FRONT_LEFT, /**< Apple calls this 'Vertical Height Left' */ + PA_CHANNEL_POSITION_TOP_FRONT_RIGHT, /**< Apple calls this 'Vertical Height Right' */ + PA_CHANNEL_POSITION_TOP_FRONT_CENTER, /**< Apple calls this 'Vertical Height Center' */ + + PA_CHANNEL_POSITION_TOP_REAR_LEFT, /**< Microsoft and Apple call this 'Top Back Left' */ + PA_CHANNEL_POSITION_TOP_REAR_RIGHT, /**< Microsoft and Apple call this 'Top Back Right' */ + PA_CHANNEL_POSITION_TOP_REAR_CENTER, /**< Microsoft and Apple call this 'Top Back Center' */ + + PA_CHANNEL_POSITION_MAX +} pa_channel_position_t; + +typedef struct pa_channel_map { + uint8_t channels; + pa_channel_position_t map[PA_CHANNELS_MAX]; +} pa_channel_map; + +static inline int pa_channels_valid(uint8_t channels) +{ + return channels > 0 && channels <= PA_CHANNELS_MAX; +} + +static inline int pa_channel_map_valid(const pa_channel_map *map) +{ + unsigned c; + if (!pa_channels_valid(map->channels)) + return 0; + for (c = 0; c < map->channels; c++) + if (map->map[c] < 0 || map->map[c] >= PA_CHANNEL_POSITION_MAX) + return 0; + return 1; +} +static inline pa_channel_map* pa_channel_map_init(pa_channel_map *m) +{ + unsigned c; + m->channels = 0; + for (c = 0; c < PA_CHANNELS_MAX; c++) + m->map[c] = PA_CHANNEL_POSITION_INVALID; + return m; +} + +static inline pa_channel_map* pa_channel_map_init_auto(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def) +{ + unsigned i; + + pa_assert(m); + pa_assert(pa_channels_valid(channels)); + pa_assert(def < PA_CHANNEL_MAP_DEF_MAX); + + pa_channel_map_init(m); + + m->channels = (uint8_t) channels; + + switch (def) { + case PA_CHANNEL_MAP_ALSA: + switch (channels) { + case 1: + m->map[0] = PA_CHANNEL_POSITION_MONO; + return m; + case 8: + m->map[6] = PA_CHANNEL_POSITION_SIDE_LEFT; + m->map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT; + SPA_FALLTHROUGH; + case 6: + m->map[5] = PA_CHANNEL_POSITION_LFE; + SPA_FALLTHROUGH; + case 5: + m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER; + SPA_FALLTHROUGH; + case 4: + m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT; + m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT; + SPA_FALLTHROUGH; + case 2: + m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT; + m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT; + return m; + default: + return NULL; + } + case PA_CHANNEL_MAP_AUX: + for (i = 0; i < channels; i++) + m->map[i] = PA_CHANNEL_POSITION_AUX0 + (i & 31); + return m; + default: + break; + } + return NULL; +} + +static inline pa_channel_map* pa_channel_map_init_extend(pa_channel_map *m, + unsigned channels, pa_channel_map_def_t def) +{ + pa_channel_map *r; + if ((r = pa_channel_map_init_auto(m, channels, def)) != NULL) + return r; + return pa_channel_map_init_auto(m, channels, PA_CHANNEL_MAP_AUX); +} + +typedef uint64_t pa_channel_position_mask_t; + +#define PA_CHANNEL_POSITION_MASK(f) ((pa_channel_position_mask_t) (1ULL << (f))) + +#define PA_CHANNEL_POSITION_MASK_LEFT \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT)) \ + +#define PA_CHANNEL_POSITION_MASK_RIGHT \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT)) + +#define PA_CHANNEL_POSITION_MASK_CENTER \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER)) + +#define PA_CHANNEL_POSITION_MASK_FRONT \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER)) + +#define PA_CHANNEL_POSITION_MASK_REAR \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_REAR_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER)) + +#define PA_CHANNEL_POSITION_MASK_LFE \ + PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_LFE) + +#define PA_CHANNEL_POSITION_MASK_HFE \ + (PA_CHANNEL_POSITION_MASK_REAR | PA_CHANNEL_POSITION_MASK_FRONT \ + | PA_CHANNEL_POSITION_MASK_LEFT | PA_CHANNEL_POSITION_MASK_RIGHT \ + | PA_CHANNEL_POSITION_MASK_CENTER) + +#define PA_CHANNEL_POSITION_MASK_SIDE_OR_TOP_CENTER \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_SIDE_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER)) + +#define PA_CHANNEL_POSITION_MASK_TOP \ + (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_FRONT_CENTER) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_LEFT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_RIGHT) \ + | PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_TOP_REAR_CENTER)) + +#define PA_CHANNEL_POSITION_MASK_ALL \ + ((pa_channel_position_mask_t) (PA_CHANNEL_POSITION_MASK(PA_CHANNEL_POSITION_MAX)-1)) + +static const char *const pa_position_table[PA_CHANNEL_POSITION_MAX] = { + [PA_CHANNEL_POSITION_MONO] = "mono", + [PA_CHANNEL_POSITION_FRONT_CENTER] = "front-center", + [PA_CHANNEL_POSITION_FRONT_LEFT] = "front-left", + [PA_CHANNEL_POSITION_FRONT_RIGHT] = "front-right", + [PA_CHANNEL_POSITION_REAR_CENTER] = "rear-center", + [PA_CHANNEL_POSITION_REAR_LEFT] = "rear-left", + [PA_CHANNEL_POSITION_REAR_RIGHT] = "rear-right", + [PA_CHANNEL_POSITION_LFE] = "lfe", + [PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "front-left-of-center", + [PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "front-right-of-center", + [PA_CHANNEL_POSITION_SIDE_LEFT] = "side-left", + [PA_CHANNEL_POSITION_SIDE_RIGHT] = "side-right", + [PA_CHANNEL_POSITION_AUX0] = "aux0", + [PA_CHANNEL_POSITION_AUX1] = "aux1", + [PA_CHANNEL_POSITION_AUX2] = "aux2", + [PA_CHANNEL_POSITION_AUX3] = "aux3", + [PA_CHANNEL_POSITION_AUX4] = "aux4", + [PA_CHANNEL_POSITION_AUX5] = "aux5", + [PA_CHANNEL_POSITION_AUX6] = "aux6", + [PA_CHANNEL_POSITION_AUX7] = "aux7", + [PA_CHANNEL_POSITION_AUX8] = "aux8", + [PA_CHANNEL_POSITION_AUX9] = "aux9", + [PA_CHANNEL_POSITION_AUX10] = "aux10", + [PA_CHANNEL_POSITION_AUX11] = "aux11", + [PA_CHANNEL_POSITION_AUX12] = "aux12", + [PA_CHANNEL_POSITION_AUX13] = "aux13", + [PA_CHANNEL_POSITION_AUX14] = "aux14", + [PA_CHANNEL_POSITION_AUX15] = "aux15", + [PA_CHANNEL_POSITION_AUX16] = "aux16", + [PA_CHANNEL_POSITION_AUX17] = "aux17", + [PA_CHANNEL_POSITION_AUX18] = "aux18", + [PA_CHANNEL_POSITION_AUX19] = "aux19", + [PA_CHANNEL_POSITION_AUX20] = "aux20", + [PA_CHANNEL_POSITION_AUX21] = "aux21", + [PA_CHANNEL_POSITION_AUX22] = "aux22", + [PA_CHANNEL_POSITION_AUX23] = "aux23", + [PA_CHANNEL_POSITION_AUX24] = "aux24", + [PA_CHANNEL_POSITION_AUX25] = "aux25", + [PA_CHANNEL_POSITION_AUX26] = "aux26", + [PA_CHANNEL_POSITION_AUX27] = "aux27", + [PA_CHANNEL_POSITION_AUX28] = "aux28", + [PA_CHANNEL_POSITION_AUX29] = "aux29", + [PA_CHANNEL_POSITION_AUX30] = "aux30", + [PA_CHANNEL_POSITION_AUX31] = "aux31", + + [PA_CHANNEL_POSITION_TOP_CENTER] = "top-center", + [PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center", + [PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left", + [PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right", + [PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center", + [PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left", + [PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right" +}; + +static inline pa_channel_position_t pa_channel_position_from_string(const char *p) +{ + pa_channel_position_t i; + /* Some special aliases */ + if (pa_streq(p, "left")) + return PA_CHANNEL_POSITION_LEFT; + else if (pa_streq(p, "right")) + return PA_CHANNEL_POSITION_RIGHT; + else if (pa_streq(p, "center")) + return PA_CHANNEL_POSITION_CENTER; + else if (pa_streq(p, "subwoofer")) + return PA_CHANNEL_POSITION_SUBWOOFER; + for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++) + if (pa_streq(p, pa_position_table[i])) + return i; + return PA_CHANNEL_POSITION_INVALID; +} + +static inline pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) +{ + const char *state; + pa_channel_map map; + char *p; + pa_channel_map_init(&map); + if (pa_streq(s, "stereo")) { + map.channels = 2; + map.map[0] = PA_CHANNEL_POSITION_LEFT; + map.map[1] = PA_CHANNEL_POSITION_RIGHT; + goto finish; + } else if (pa_streq(s, "surround-21")) { + map.channels = 3; + map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT; + map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT; + map.map[2] = PA_CHANNEL_POSITION_LFE; + goto finish; + } else if (pa_streq(s, "surround-40")) { + map.channels = 4; + 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; + goto finish; + } else if (pa_streq(s, "surround-41")) { + map.channels = 5; + 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_LFE; + goto finish; + } else if (pa_streq(s, "surround-50")) { + map.channels = 5; + 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; + goto finish; + } 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 */ |