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prevent race while changing codecs mid call

This commit is contained in:
Anthony Minessale 2010-12-03 20:22:02 -06:00
parent 3501087b4d
commit 7aa72b67df
2 changed files with 18 additions and 1 deletions
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1
src/mod/endpoints/mod_sofia/sofia_glue.c
View File

@ -2673,6 +2673,7 @@ switch_status_t sofia_glue_tech_set_codec(private_object_t *tech_pvt, int force)
switch_core_session_lock_codec_write(tech_pvt->session);
switch_core_session_lock_codec_read(tech_pvt->session);
resetting = 1;
switch_yield(tech_pvt->read_impl.microseconds_per_packet);
switch_core_codec_destroy(&tech_pvt->read_codec);
switch_core_codec_destroy(&tech_pvt->write_codec);
} else {

18
src/switch_core_io.c
View File

@ -110,6 +110,15 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
switch_assert(session != NULL);
if (switch_mutex_trylock(session->codec_read_mutex) == SWITCH_STATUS_SUCCESS) {
switch_mutex_unlock(session->codec_read_mutex);
} else {
switch_cond_next();
*frame = &runtime.dummy_cng_frame;
return SWITCH_STATUS_SUCCESS;
}
if (!(session->read_codec && session->read_codec->implementation && switch_core_codec_ready(session->read_codec))) {
if (switch_channel_test_flag(session->channel, CF_PROXY_MODE) || switch_channel_get_state(session->channel) == CS_HIBERNATE) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "%s reading on a session with no media!\n",
@ -641,11 +650,18 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_write_frame(switch_core_sess
return SWITCH_STATUS_FALSE;
}
if (switch_mutex_trylock(session->codec_write_mutex) == SWITCH_STATUS_SUCCESS) {
switch_mutex_unlock(session->codec_write_mutex);
} else {
return SWITCH_STATUS_SUCCESS;
}
if (switch_test_flag(frame, SFF_CNG)) {
if (switch_channel_test_flag(session->channel, CF_ACCEPT_CNG)) {
pass_cng = 1;
} else {
return SWITCH_STATUS_SUCCESS;
}
return SWITCH_STATUS_SUCCESS;
}
if (!(session->write_codec && switch_core_codec_ready(session->write_codec)) && !pass_cng) {