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Allow the native formats of a channel to influence the audio that is going to the engine. The best format will try to be chosen with an ultimate fallback to signed linear if possible.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@74570 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2007-07-11 16:19:00 +00:00
parent b314d6ee08
commit f8e605fe25
3 changed files with 11 additions and 6 deletions
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4
apps/app_speech_utils.c
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@@ -352,7 +352,7 @@ static int speech_create(struct ast_channel *chan, void *data)
u = ast_module_user_add(chan);
/* Request a speech object */
speech = ast_speech_new(data, AST_FORMAT_SLINEAR);
speech = ast_speech_new(data, chan->nativeformats);
if (speech == NULL) {
/* Not available */
pbx_builtin_setvar_helper(chan, "ERROR", "1");
@@ -572,7 +572,7 @@ static int speech_background(struct ast_channel *chan, void *data)
oldreadformat = chan->readformat;
/* Change read format to be signed linear */
if (ast_set_read_format(chan, AST_FORMAT_SLINEAR)) {
if (ast_set_read_format(chan, speech->format)) {
ast_module_user_remove(u);
return -1;
}

2
include/asterisk/speech.h
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@@ -128,7 +128,7 @@ int ast_speech_results_free(struct ast_speech_result *result);
/*! \brief Indicate to the speech engine that audio is now going to start being written */
void ast_speech_start(struct ast_speech *speech);
/*! \brief Create a new speech structure */
struct ast_speech *ast_speech_new(char *engine_name, int format);
struct ast_speech *ast_speech_new(char *engine_name, int formats);
/*! \brief Destroy a speech structure */
int ast_speech_destroy(struct ast_speech *speech);
/*! \brief Write audio to the speech engine */

11
res/res_speech.c
View File

@@ -159,17 +159,22 @@ int ast_speech_change(struct ast_speech *speech, char *name, const char *value)
}
/*! \brief Create a new speech structure using the engine specified */
struct ast_speech *ast_speech_new(char *engine_name, int format)
struct ast_speech *ast_speech_new(char *engine_name, int formats)
{
struct ast_speech_engine *engine = NULL;
struct ast_speech *new_speech = NULL;
int format = AST_FORMAT_SLINEAR;
/* Try to find the speech recognition engine that was requested */
if (!(engine = find_engine(engine_name)))
return NULL;
/* Make sure the requested format fits */
if (!(engine->formats & format))
/* Before even allocating the memory below do some codec negotiation, we choose the best codec possible and fall back to signed linear if possible */
if ((format = (engine->formats & formats)))
format = ast_best_codec(format);
else if ((engine->formats & AST_FORMAT_SLINEAR))
format = AST_FORMAT_SLINEAR;
else
return NULL;
/* Allocate our own speech structure, and try to allocate a structure from the engine too */