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Add pass through support for Opus and VP8; Opus format attribute negotiation

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This patch adds pass through support for Opus and VP8. That includes:

* Format attribute negotiation for Opus. Note that unlike some other codecs,
  the draft RFC specifies having spaces delimiting the attributes in addition
  to ';', so you have "attra=X; attrb=Y". This broke the attribute parsing in
  chan_sip, so a small tweak was also included in this patch for that.

* A format attribute negotiation module for Opus, res_format_attr_opus

* Fast picture update for VP8. Since VP8 uses a different RTCP packet number
  than FIR, this really is specific to VP8 at this time.

Note that the format attribute negotiation in res_pjsip_sdp_rtp was written
by mjordan. The rest of this patch was written completely by Lorenzo Miniero.

Review: https://reviewboard.asterisk.org/r/2723/

(closes issue ASTERISK-21981)
Reported by: Tzafrir Cohen
patches:
  asterisk_opus+vp8_passthrough_20130718.patch uploaded by lminiero (License 6518)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@397526 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Jordan
2013-08-23 15:42:27 +00:00
parent e31bd332b8
commit 4d348e853c
11 changed files with 543 additions and 25 deletions
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5
include/asterisk/format.h
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@@ -29,6 +29,7 @@
#include "asterisk/astobj2.h"
#include "asterisk/silk.h"
#include "asterisk/celt.h"
#include "asterisk/opus.h"
#define AST_FORMAT_ATTR_SIZE 64
#define AST_FORMAT_INC 100000
@@ -101,6 +102,8 @@ enum ast_format_id {
AST_FORMAT_SLINEAR192 = 27 + AST_FORMAT_TYPE_AUDIO,
AST_FORMAT_SPEEX32 = 28 + AST_FORMAT_TYPE_AUDIO,
AST_FORMAT_CELT = 29 + AST_FORMAT_TYPE_AUDIO,
/*! Opus */
AST_FORMAT_OPUS = 30 + AST_FORMAT_TYPE_AUDIO,
/*! H.261 Video */
AST_FORMAT_H261 = 1 + AST_FORMAT_TYPE_VIDEO,
@@ -112,6 +115,8 @@ enum ast_format_id {
AST_FORMAT_H264 = 4 + AST_FORMAT_TYPE_VIDEO,
/*! MPEG4 Video */
AST_FORMAT_MP4_VIDEO = 5 + AST_FORMAT_TYPE_VIDEO,
/*! VP8 */
AST_FORMAT_VP8 = 6 + AST_FORMAT_TYPE_VIDEO,
/*! JPEG Images */
AST_FORMAT_JPEG = 1 + AST_FORMAT_TYPE_IMAGE,