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implement new API functions pa_channel_map_can_balance(), pa_channel_map_to_name() and pa_channel_map_to_pretty_name()

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This commit is contained in:
Lennart Poettering 2009-01-27 00:46:39 +01:00
parent 24b3a743bd
commit e52c5ea68a
3 changed files with 207 additions and 4 deletions
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3
src/map-file
View file

@ -9,6 +9,7 @@ pa_browser_unref;
pa_bytes_per_second;
pa_bytes_snprint;
pa_bytes_to_usec;
pa_channel_map_can_balance;
pa_channel_map_compatible;
pa_channel_map_equal;
pa_channel_map_init;
@ -19,6 +20,8 @@ pa_channel_map_init_stereo;
pa_channel_map_parse;
pa_channel_map_snprint;
pa_channel_map_superset;
pa_channel_map_to_name;
pa_channel_map_to_pretty_name;
pa_channel_map_valid;
pa_channel_position_to_pretty_string;
pa_channel_position_to_string;

187
src/pulse/channelmap.c
View file

@ -32,6 +32,7 @@
#include <pulse/i18n.h>
#include <pulsecore/core-util.h>
#include <pulsecore/macro.h>
#include <pulsecore/bitset.h>
#include "channelmap.h"
@ -497,11 +498,58 @@ pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
pa_channel_map_init(&map);
/* We don't need to match against the well known channel mapping
* "mono" here explicitly, because that can be understood as
* listing with one channel called "mono". */
if (strcmp(s, "stereo") == 0) {
map.channels = 2;
map.map[0] = PA_CHANNEL_POSITION_LEFT;
map.map[1] = PA_CHANNEL_POSITION_RIGHT;
goto finish;
} else if (strcmp(s, "surround-40") == 0) {
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 (strcmp(s, "surround-41") == 0) {
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 (strcmp(s, "surround-50") == 0) {
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 (strcmp(s, "surround-51") == 0) {
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 (strcmp(s, "surround-71") == 0) {
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;
@ -579,7 +627,7 @@ int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *s
}
int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) {
pa_bool_t in_a[PA_CHANNEL_POSITION_MAX];
pa_bitset_t in_a[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned i;
pa_assert(a);
@ -588,11 +636,144 @@ int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) {
memset(in_a, 0, sizeof(in_a));
for (i = 0; i < a->channels; i++)
in_a[a->map[i]] = TRUE;
pa_bitset_set(in_a, a->map[i], TRUE);
for (i = 0; i < b->channels; i++)
if (!in_a[b->map[i]])
if (!pa_bitset_get(in_a, b->map[i]))
return 0;
return 1;
}
int pa_channel_map_can_balance(const pa_channel_map *map) {
unsigned c;
pa_assert(map);
for (c = 0; c < map->channels; c++)
switch (map->map[c]) {
case PA_CHANNEL_POSITION_LEFT:
case PA_CHANNEL_POSITION_RIGHT:
case PA_CHANNEL_POSITION_REAR_LEFT:
case PA_CHANNEL_POSITION_REAR_RIGHT:
case PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER:
case PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER:
case PA_CHANNEL_POSITION_SIDE_LEFT:
case PA_CHANNEL_POSITION_SIDE_RIGHT:
case PA_CHANNEL_POSITION_TOP_FRONT_LEFT:
case PA_CHANNEL_POSITION_TOP_FRONT_RIGHT:
case PA_CHANNEL_POSITION_TOP_REAR_LEFT:
case PA_CHANNEL_POSITION_TOP_REAR_RIGHT:
return 1;
default:
;
}
return 0;
}
const char* pa_channel_map_to_name(const pa_channel_map *map) {
pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned c;
pa_assert(map);
memset(in_map, 0, sizeof(in_map));
for (c = 0; c < map->channels; c++)
pa_bitset_set(in_map, map->map[c], TRUE);
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_MONO, -1))
return "mono";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
return "stereo";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
return "surround-40";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_LFE, -1))
return "surround-41";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, -1))
return "surround-50";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
return "surround-51";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
return "surround-71";
return NULL;
}
const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) {
pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned c;
pa_assert(map);
memset(in_map, 0, sizeof(in_map));
for (c = 0; c < map->channels; c++)
pa_bitset_set(in_map, map->map[c], TRUE);
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_MONO, -1))
return _("Mono");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
return _("Stereo");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
return _("Surround 4.0");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_LFE, -1))
return _("Surround 4.1");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, -1))
return _("Surround 5.0");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
return _("Surround 5.1");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
return _("Surround 7.1");
return NULL;
}

21
src/pulse/channelmap.h
View file

@ -214,7 +214,10 @@ const char* pa_channel_position_to_pretty_string(pa_channel_position_t pos);
/** Make a humand readable string from the specified channel map */
char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map);
/** Parse a channel position list into a channel map structure. */
/** Parse a channel position list or well-known mapping name into a
* channel map structure. This turns the output of
* pa_channel_map_snprint() and pa_channel_map_to_name() back into a
* pa_channel_map */
pa_channel_map *pa_channel_map_parse(pa_channel_map *map, const char *s);
/** Compare two channel maps. Return 1 if both match. */
@ -230,6 +233,22 @@ int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *s
/** Returns non-zero if every channel defined in b is also defined in a. \since 0.9.15 */
int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) PA_GCC_PURE;
/** Returns non-zero if it makes sense to apply a volume 'balance'
* with this mapping, i.e. if there are left/right channels
* available. \since 0.9.15 */
int pa_channel_map_can_balance(const pa_channel_map *map) PA_GCC_PURE;
/** Tries to find a well-known channel mapping name for this channel
* mapping. I.e. "stereo", "surround-71" and so on. If the channel
* mapping is unknown NULL will be returned. This name can be parsed
* with pa_channel_map_parse() \since 0.9.15 */
const char* pa_channel_map_to_name(const pa_channel_map *map) PA_GCC_PURE;
/** Tries to find a human readable text label for this channel
mapping. I.e. "Stereo", "Surround 7.1" and so on. If the channel
mapping is unknown NULL will be returned. \since 0.9.15 */
const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) PA_GCC_PURE;
PA_C_DECL_END
#endif