Add "prod" function, to get audio moving

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@856 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channel.c b/channel.c
index 33538e7a26ef2da8995c632ef29ee252f4a1ace7..8d235ea3b77c2165a094ffc32ff5b5cea4924c0d 100755 (executable)
--- a/channel.c
+++ b/channel.c
@@ -726,6 +726,7 @@ int ast_activate_generator(struct ast_channel *chan, struct ast_generator *gen,
                chan->generator->release(chan, chan->generatordata);
                chan->generatordata = NULL;
        }
+       ast_prod(chan);
        if ((chan->generatordata = gen->alloc(chan, params))) {
                chan->generator = gen;
        } else {
@@ -1210,6 +1211,18 @@ static int do_senddigit(struct ast_channel *chan, char digit)
        return 0;
 }
 
+int ast_prod(struct ast_channel *chan)
+{
+       struct ast_frame a = { AST_FRAME_VOICE };
+       char nothing[128];
+       /* Send an empty audio frame to get things moving */
+       if (chan->_state != AST_STATE_UP) {
+               a.subclass = chan->pvt->rawwriteformat;
+               a.data = nothing + AST_FRIENDLY_OFFSET;
+       }
+       return 0;
+}
+
 int ast_write(struct ast_channel *chan, struct ast_frame *fr)
 {
        int res = -1;

diff --git a/include/asterisk/channel.h b/include/asterisk/channel.h
index 73ecc8b29cd5b7466d05aa074881fbf4b77b667a..da849c8997feb46313fade0b4b9be3059d550869 100755 (executable)
--- a/include/asterisk/channel.h
+++ b/include/asterisk/channel.h
@@ -462,6 +462,9 @@ struct ast_frame *ast_read(struct ast_channel *chan);
  */
 int ast_write(struct ast_channel *chan, struct ast_frame *frame);
 
+/* Send empty audio to prime a channel driver */
+int ast_prod(struct ast_channel *chan);
+
 //! Sets read format on channel chan
 /*! 
  * \param chan channel to change