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res_speech: allow speech to translate input channel 

* Allow res_speech to translate the input channel if the
  format is translatable to a format suppored by the
  speech provider.

Resolves: #129

UserNote: res_speech now supports translation of an input channel
to a format supported by the speech provider, provided a translation
path is available between the source format and provider capabilites.

(cherry picked from commit c3e2bff36e)
This commit is contained in:
Mike Bradeen 2023-09-07 11:21:32 -06:00 committed by Asterisk Development Team
parent ea74f942ce
commit 0b4427d621
1 changed files with 12 additions and 1 deletions
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13
res/res_speech.c
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@ -37,6 +37,7 @@
#include "asterisk/term.h"
#include "asterisk/speech.h"
#include "asterisk/format_cache.h"
#include "asterisk/translate.h"
static AST_RWLIST_HEAD_STATIC(engines, ast_speech_engine);
static struct ast_speech_engine *default_engine = NULL;
@ -183,6 +184,7 @@ struct ast_speech *ast_speech_new(const char *engine_name, const struct ast_form
struct ast_speech *new_speech = NULL;
struct ast_format_cap *joint;
RAII_VAR(struct ast_format *, best, NULL, ao2_cleanup);
RAII_VAR(struct ast_format *, best_translated, NULL, ao2_cleanup);
/* Try to find the speech recognition engine that was requested */
if (!(engine = ast_speech_find_engine(engine_name)))
@ -201,7 +203,16 @@ struct ast_speech *ast_speech_new(const char *engine_name, const struct ast_form
if (ast_format_cap_iscompatible_format(engine->formats, ast_format_slin) != AST_FORMAT_CMP_NOT_EQUAL) {
best = ao2_bump(ast_format_slin);
} else {
return NULL;
/*
* If there is no overlap and the engine does not support slin, find the best
* format to translate to and set that as the 'best' input format for the engine.
* API consumer is responsible for translating to this format.
* Safe to cast cap as ast_translator_best_choice does not modify the caps
*/
if (ast_translator_best_choice(engine->formats, (struct ast_format_cap *)cap, &best, &best_translated)) {
/* No overlapping formats and no translatable formats */
return NULL;
}
}
}