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-rw-r--r--src/pulse/format.c460
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;
+}