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Add support for allowing the channel driver to handle transcoding.

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This was accomplished using a set of options and the setoption channel callback.
The core calls into the channel driver using these options and the channel driver
either returns success or failure.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@187360 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2009-04-09 16:19:35 +00:00
parent 8f28bfc63e
commit abcc0b9397
3 changed files with 51 additions and 2 deletions
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22
main/channel.c
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@@ -3769,7 +3769,7 @@ done:
static int set_format(struct ast_channel *chan, int fmt, int *rawformat, int *format,
struct ast_trans_pvt **trans, const int direction)
{
int native;
int native, native_fmt = ast_best_codec(fmt);
int res;
char from[200], to[200];
@@ -3780,7 +3780,19 @@ static int set_format(struct ast_channel *chan, int fmt, int *rawformat, int *fo
if (!fmt || !native) /* No audio requested */
return 0; /* Let's try a call without any sounds (video, text) */
/* See if the underlying channel driver is capable of performing transcoding for us */
if (!ast_channel_setoption(chan, direction ? AST_OPTION_FORMAT_WRITE : AST_OPTION_FORMAT_READ, &native_fmt, sizeof(int*), 0)) {
ast_debug(1, "Channel driver natively set channel %s to %s format %s (%d)\n", chan->name,
direction ? "write" : "read", ast_getformatname(native_fmt), native_fmt);
chan->nativeformats = *rawformat = *format = native_fmt;
if (*trans) {
ast_translator_free_path(*trans);
}
*trans = NULL;
return 0;
}
/* Find a translation path from the native format to one of the desired formats */
if (!direction)
/* reading */
@@ -4202,6 +4214,12 @@ static int ast_channel_make_compatible_helper(struct ast_channel *from, struct a
int src;
int dst;
/* See if the channel driver can natively make these two channels compatible */
if (from->tech->bridge && from->tech->bridge == to->tech->bridge &&
!ast_channel_setoption(from, AST_OPTION_MAKE_COMPATIBLE, to, sizeof(struct ast_channel *), 0)) {
return 0;
}
if (from->readformat == to->writeformat && from->writeformat == to->readformat) {
/* Already compatible! Moving on ... */
return 0;