From c19ca186c1499a338643fa9c2ee3d0f533f15a84 Mon Sep 17 00:00:00 2001 From: Mark Michelson Date: Tue, 14 Oct 2008 23:00:01 +0000 Subject: [PATCH] Add a tolerance period for sync-triggered audiohooks so that if packetization of audio is close (but not equal) we don't end up flushing the audiohooks over small inconsistencies in synchronization. Related to issue #13005, and solves the issue for most people who were experiencing the problem. However, a small number of people are still experiencing the problem on long calls, so I am not closing the issue yet git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@149204 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- include/asterisk/audiohook.h | 2 ++ main/audiohook.c | 9 ++++++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/include/asterisk/audiohook.h b/include/asterisk/audiohook.h index 5f79d83b0e..3375906363 100644 --- a/include/asterisk/audiohook.h +++ b/include/asterisk/audiohook.h @@ -56,6 +56,8 @@ enum ast_audiohook_flags { AST_AUDIOHOOK_TRIGGER_SYNC = (1 << 2), /*!< Audiohook wants to be triggered when both sides have combined audio available */ }; +#define AST_AUDIOHOOK_SYNC_TOLERANCE 100 /*< Tolerance in milliseconds for audiohooks synchronization */ + struct ast_audiohook; /*! \brief Callback function for manipulate audiohook type diff --git a/main/audiohook.c b/main/audiohook.c index 809c176295..f15395be94 100644 --- a/main/audiohook.c +++ b/main/audiohook.c @@ -130,12 +130,19 @@ int ast_audiohook_write_frame(struct ast_audiohook *audiohook, enum ast_audiohoo struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory); struct ast_slinfactory *other_factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->write_factory : &audiohook->read_factory); struct timeval *time = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_time : &audiohook->write_time), previous_time = *time; + int our_factory_ms; + int other_factory_samples; + int other_factory_ms; /* Update last feeding time to be current */ *time = ast_tvnow(); + our_factory_ms = ast_tvdiff_ms(*time, previous_time) + (ast_slinfactory_available(factory) / 8); + other_factory_samples = ast_slinfactory_available(other_factory); + other_factory_ms = other_factory_samples / 8; + /* If we are using a sync trigger and this factory suddenly got audio fed in after a lapse, then flush both factories to ensure they remain in sync */ - if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC) && ast_slinfactory_available(other_factory) && (ast_tvdiff_ms(*time, previous_time) > (ast_slinfactory_available(other_factory) / 8))) { + if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC) && other_factory_samples && (our_factory_ms - other_factory_ms > AST_AUDIOHOOK_SYNC_TOLERANCE)) { if (option_debug) ast_log(LOG_DEBUG, "Flushing audiohook %p so it remains in sync\n", audiohook); ast_slinfactory_flush(factory);