diff options
Diffstat (limited to 'src/pulse/format.c')
-rw-r--r-- | src/pulse/format.c | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/src/pulse/format.c b/src/pulse/format.c new file mode 100644 index 00000000..a1a0981b --- /dev/null +++ b/src/pulse/format.c @@ -0,0 +1,460 @@ +/*** + This file is part of PulseAudio. + + Copyright 2011 Intel Corporation + Copyright 2011 Collabora Multimedia + Copyright 2011 Arun Raghavan <arun.raghavan@collabora.co.uk> + + 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, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <json.h> + +#include <pulse/internal.h> +#include <pulse/xmalloc.h> +#include <pulse/i18n.h> + +#include <pulsecore/core-util.h> +#include <pulsecore/macro.h> + +#include "format.h" + +#define PA_JSON_MIN_KEY "min" +#define PA_JSON_MAX_KEY "max" + +static int pa_format_info_prop_compatible(const char *one, const char *two); + +const char *pa_encoding_to_string(pa_encoding_t e) { + static const char* const table[]= { + [PA_ENCODING_PCM] = "pcm", + [PA_ENCODING_AC3_IEC61937] = "ac3-iec61937", + [PA_ENCODING_EAC3_IEC61937] = "eac3-iec61937", + [PA_ENCODING_MPEG_IEC61937] = "mpeg-iec61937", + [PA_ENCODING_DTS_IEC61937] = "dts-iec61937", + [PA_ENCODING_ANY] = "any", + }; + + if (e < 0 || e >= PA_ENCODING_MAX) + return NULL; + + return table[e]; +} + +pa_format_info* pa_format_info_new(void) { + pa_format_info *f = pa_xnew(pa_format_info, 1); + + f->encoding = PA_ENCODING_INVALID; + f->plist = pa_proplist_new(); + + return f; +} + +pa_format_info* pa_format_info_copy(const pa_format_info *src) { + pa_format_info *dest; + + pa_assert(src); + + dest = pa_xnew(pa_format_info, 1); + + dest->encoding = src->encoding; + + if (src->plist) + dest->plist = pa_proplist_copy(src->plist); + else + dest->plist = NULL; + + return dest; +} + +void pa_format_info_free(pa_format_info *f) { + pa_assert(f); + + pa_proplist_free(f->plist); + pa_xfree(f); +} + +void pa_format_info_free2(pa_format_info *f, void *userdata) { + pa_format_info_free(f); +} + +int pa_format_info_valid(const pa_format_info *f) { + return (f->encoding >= 0 && f->encoding < PA_ENCODING_MAX && f->plist != NULL); +} + +int pa_format_info_is_pcm(const pa_format_info *f) { + return f->encoding == PA_ENCODING_PCM; +} + +char *pa_format_info_snprint(char *s, size_t l, const pa_format_info *f) { + char *tmp; + + pa_assert(s); + pa_assert(l > 0); + pa_assert(f); + + pa_init_i18n(); + + if (!pa_format_info_valid(f)) + pa_snprintf(s, l, _("(invalid)")); + else { + tmp = pa_proplist_to_string_sep(f->plist, ", "); + pa_snprintf(s, l, _("%s, %s"), pa_encoding_to_string(f->encoding), tmp[0] ? tmp : _("(no properties)")); + pa_xfree(tmp); + } + + return s; +} + +int pa_format_info_is_compatible(pa_format_info *first, pa_format_info *second) { + const char *key; + void *state = NULL; + + pa_assert(first); + pa_assert(second); + + if (first->encoding != second->encoding) + return FALSE; + + while ((key = pa_proplist_iterate(first->plist, &state))) { + const char *value_one, *value_two; + + value_one = pa_proplist_gets(first->plist, key); + value_two = pa_proplist_gets(second->plist, key); + + if (!value_two || !pa_format_info_prop_compatible(value_one, value_two)) + return FALSE; + } + + return TRUE; +} + +pa_format_info* pa_format_info_from_sample_spec(pa_sample_spec *ss, pa_channel_map *map) { + char cm[PA_CHANNEL_MAP_SNPRINT_MAX]; + pa_format_info *f; + + pa_assert(ss && pa_sample_spec_valid(ss)); + pa_assert(!map || pa_channel_map_valid(map)); + + f = pa_format_info_new(); + f->encoding = PA_ENCODING_PCM; + + pa_format_info_set_sample_format(f, ss->format); + pa_format_info_set_rate(f, ss->rate); + pa_format_info_set_channels(f, ss->channels); + + if (map) { + pa_channel_map_snprint(cm, sizeof(cm), map); + pa_format_info_set_prop_string(f, PA_PROP_FORMAT_CHANNEL_MAP, cm); + } + + return f; +} + +/* For PCM streams */ +pa_bool_t pa_format_info_to_sample_spec(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) { + char *sf = NULL, *m = NULL; + int rate, channels; + pa_bool_t ret = FALSE; + + pa_assert(f); + pa_assert(ss); + pa_return_val_if_fail(f->encoding == PA_ENCODING_PCM, FALSE); + + if (!pa_format_info_get_prop_string(f, PA_PROP_FORMAT_SAMPLE_FORMAT, &sf)) + goto out; + if (!pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate)) + goto out; + if (!pa_format_info_get_prop_int(f, PA_PROP_FORMAT_CHANNELS, &channels)) + goto out; + + if ((ss->format = pa_parse_sample_format(sf)) == PA_SAMPLE_INVALID) + goto out; + + ss->rate = (uint32_t) rate; + ss->channels = (uint8_t) channels; + + if (map) { + pa_channel_map_init(map); + + if (!pa_format_info_get_prop_string(f, PA_PROP_FORMAT_CHANNEL_MAP, &m)) + goto out; + + if (m && pa_channel_map_parse(map, m) == NULL) + goto out; + } + + ret = TRUE; + +out: + if (sf) + pa_xfree(sf); + if (m) + pa_xfree(m); + + return ret; +} + +/* For compressed streams */ +pa_bool_t pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss) { + int rate; + + pa_assert(f); + pa_assert(ss); + pa_return_val_if_fail(f->encoding != PA_ENCODING_PCM, FALSE); + + ss->format = PA_SAMPLE_S16LE; + ss->channels = 2; + + pa_return_val_if_fail(pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate), FALSE); + ss->rate = (uint32_t) rate; + + if (f->encoding == PA_ENCODING_EAC3_IEC61937) + ss->rate *= 4; + + return TRUE; +} + +void pa_format_info_set_sample_format(pa_format_info *f, pa_sample_format_t sf) { + pa_format_info_set_prop_string(f, PA_PROP_FORMAT_SAMPLE_FORMAT, pa_sample_format_to_string(sf)); +} + +void pa_format_info_set_rate(pa_format_info *f, int rate) { + pa_format_info_set_prop_int(f, PA_PROP_FORMAT_RATE, rate); +} + +void pa_format_info_set_channels(pa_format_info *f, int channels) { + pa_format_info_set_prop_int(f, PA_PROP_FORMAT_CHANNELS, channels); +} + +void pa_format_info_set_channel_map(pa_format_info *f, const pa_channel_map *map) { + char map_str[PA_CHANNEL_MAP_SNPRINT_MAX]; + + pa_channel_map_snprint(map_str, sizeof(map_str), map); + + pa_format_info_set_prop_string(f, PA_PROP_FORMAT_CHANNEL_MAP, map_str); +} + +pa_bool_t pa_format_info_get_prop_int(pa_format_info *f, const char *key, int *v) { + const char *str; + json_object *o; + + pa_assert(f); + pa_assert(key); + pa_assert(v); + + pa_return_val_if_fail(str = pa_proplist_gets(f->plist, key), FALSE); + o = json_tokener_parse(str); + pa_return_val_if_fail(!is_error(o), FALSE); + if (json_object_get_type(o) != json_type_int) { + json_object_put(o); + return FALSE; + } + + *v = json_object_get_int(o); + json_object_put(o); + + return TRUE; +} + +pa_bool_t pa_format_info_get_prop_string(pa_format_info *f, const char *key, char **v) { + const char *str = NULL; + json_object *o; + + pa_assert(f); + pa_assert(key); + pa_assert(v); + + pa_return_val_if_fail(str = pa_proplist_gets(f->plist, key), FALSE); + o = json_tokener_parse(str); + pa_return_val_if_fail(!is_error(o), FALSE); + if (json_object_get_type(o) != json_type_string) { + json_object_put(o); + return FALSE; + } + + *v = pa_xstrdup(json_object_get_string(o)); + json_object_put(o); + + return TRUE; +} + +void pa_format_info_set_prop_int(pa_format_info *f, const char *key, int value) { + json_object *o; + + pa_assert(f); + pa_assert(key); + + o = json_object_new_int(value); + + pa_proplist_sets(f->plist, key, json_object_to_json_string(o)); + + json_object_put(o); +} + +void pa_format_info_set_prop_int_array(pa_format_info *f, const char *key, const int *values, int n_values) { + json_object *o; + int i; + + pa_assert(f); + pa_assert(key); + + o = json_object_new_array(); + + for (i = 0; i < n_values; i++) + json_object_array_add(o, json_object_new_int(values[i])); + + pa_proplist_sets(f->plist, key, json_object_to_json_string(o)); + + json_object_put(o); +} + +void pa_format_info_set_prop_int_range(pa_format_info *f, const char *key, int min, int max) { + json_object *o; + + pa_assert(f); + pa_assert(key); + + o = json_object_new_object(); + + json_object_object_add(o, PA_JSON_MIN_KEY, json_object_new_int(min)); + json_object_object_add(o, PA_JSON_MAX_KEY, json_object_new_int(max)); + + pa_proplist_sets(f->plist, key, json_object_to_json_string(o)); + + json_object_put(o); +} + +void pa_format_info_set_prop_string(pa_format_info *f, const char *key, const char *value) { + json_object *o; + + pa_assert(f); + pa_assert(key); + + o = json_object_new_string(value); + + pa_proplist_sets(f->plist, key, json_object_to_json_string(o)); + + json_object_put(o); +} + +void pa_format_info_set_prop_string_array(pa_format_info *f, const char *key, const char **values, int n_values) { + json_object *o; + int i; + + pa_assert(f); + pa_assert(key); + + o = json_object_new_array(); + + for (i = 0; i < n_values; i++) + json_object_array_add(o, json_object_new_string(values[i])); + + pa_proplist_sets(f->plist, key, json_object_to_json_string(o)); + + json_object_put(o); +} + +static pa_bool_t pa_json_is_fixed_type(json_object *o) +{ + switch(json_object_get_type(o)) { + case json_type_object: + case json_type_array: + return FALSE; + + default: + return TRUE; + } +} + +static int pa_json_value_equal(json_object *o1, json_object *o2) { + return (json_object_get_type(o1) == json_object_get_type(o2)) && + pa_streq(json_object_to_json_string(o1), json_object_to_json_string(o2)); +} + +static int pa_format_info_prop_compatible(const char *one, const char *two) { + json_object *o1 = NULL, *o2 = NULL; + int i, ret = 0; + + o1 = json_tokener_parse(one); + if (is_error(o1)) + goto out; + + o2 = json_tokener_parse(two); + if (is_error(o2)) + goto out; + + /* We don't deal with both values being non-fixed - just because there is no immediate need (FIXME) */ + pa_return_val_if_fail(pa_json_is_fixed_type(o1) || pa_json_is_fixed_type(o2), FALSE); + + if (pa_json_is_fixed_type(o1) && pa_json_is_fixed_type(o2)) { + ret = pa_json_value_equal(o1, o2); + goto out; + } + + if (pa_json_is_fixed_type(o1)) { + json_object *tmp = o2; + o2 = o1; + o1 = tmp; + } + + /* o2 is now a fixed type, and o1 is not */ + + if (json_object_get_type(o1) == json_type_array) { + for (i = 0; i < json_object_array_length(o1); i++) { + if (pa_json_value_equal(json_object_array_get_idx(o1, i), o2)) { + ret = 1; + break; + } + } + } else if (json_object_get_type(o1) == json_type_object) { + /* o1 should be a range type */ + int min, max, v; + json_object *o_min = NULL, *o_max = NULL; + + if (json_object_get_type(o2) != json_type_int) { + /* We don't support non-integer ranges */ + goto out; + } + + o_min = json_object_object_get(o1, PA_JSON_MIN_KEY); + if (!o_min || json_object_get_type(o_min) != json_type_int) + goto out; + + o_max = json_object_object_get(o1, PA_JSON_MAX_KEY); + if (!o_max || json_object_get_type(o_max) != json_type_int) + goto out; + + v = json_object_get_int(o2); + min = json_object_get_int(o_min); + max = json_object_get_int(o_max); + + ret = v >= min && v <= max; + } else { + pa_log_warn("Got a format type that we don't support"); + } + +out: + if (o1) + json_object_put(o1); + if (o2) + json_object_put(o2); + + return ret; +} |