[PATCH v5 0/5] MR1278: winegstreamer: Do not destroy condition variables when a thread is waiting on them.
It is possible that a stream is destroyed while another thread is waiting on event_empty_cond or event_cond. The waiting thread should have the opportunity to be rescheduled and exit the critical section before the condition variables and the mutex are destroyed.
-- v5: winegstreamer: Synchronize media source async commands and shutdown. winegstreamer: Free the GStreamer buffer when freeing a WG parser stream. winegstreamer: Synchronize access to the media source from callbacks. winegstreamer: Synchronize concurrent access to the media stream. winegstreamer: Synchronize concurrent access to the media source.
From: Giovanni Mascellani gmascellani@codeweavers.com
--- dlls/winegstreamer/media_source.c | 76 +++++++++++++++++++++++-------- 1 file changed, 58 insertions(+), 18 deletions(-)
diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c index 9bb7a441a8f..f22cf4be08f 100644 --- a/dlls/winegstreamer/media_source.c +++ b/dlls/winegstreamer/media_source.c @@ -92,6 +92,8 @@ struct media_source IMFMediaEventQueue *event_queue; IMFByteStream *byte_stream;
+ CRITICAL_SECTION cs; + struct wg_parser *wg_parser;
struct media_stream **streams; @@ -1114,7 +1116,9 @@ static HRESULT WINAPI media_source_rate_control_SetRate(IMFRateControl *iface, B if (FAILED(hr = IMFRateSupport_IsRateSupported(&source->IMFRateSupport_iface, thin, rate, NULL))) return hr;
+ EnterCriticalSection(&source->cs); source->rate = rate; + LeaveCriticalSection(&source->cs);
return IMFMediaEventQueue_QueueEventParamVar(source->event_queue, MESourceRateChanged, &GUID_NULL, S_OK, NULL); } @@ -1128,7 +1132,9 @@ static HRESULT WINAPI media_source_rate_control_GetRate(IMFRateControl *iface, B if (thin) *thin = FALSE;
+ EnterCriticalSection(&source->cs); *rate = source->rate; + LeaveCriticalSection(&source->cs);
return S_OK; } @@ -1190,6 +1196,8 @@ static ULONG WINAPI media_source_Release(IMFMediaSource *iface) { IMFMediaSource_Shutdown(&source->IMFMediaSource_iface); IMFMediaEventQueue_Release(source->event_queue); + source->cs.DebugInfo->Spare[0] = 0; + DeleteCriticalSection(&source->cs); free(source); }
@@ -1236,10 +1244,15 @@ static HRESULT WINAPI media_source_QueueEvent(IMFMediaSource *iface, MediaEventT static HRESULT WINAPI media_source_GetCharacteristics(IMFMediaSource *iface, DWORD *characteristics) { struct media_source *source = impl_from_IMFMediaSource(iface); + BOOL is_shutdown;
TRACE("%p, %p.\n", iface, characteristics);
- if (source->state == SOURCE_SHUTDOWN) + EnterCriticalSection(&source->cs); + is_shutdown = source->state == SOURCE_SHUTDOWN; + LeaveCriticalSection(&source->cs); + + if (is_shutdown) return MF_E_SHUTDOWN;
*characteristics = MFMEDIASOURCE_CAN_SEEK | MFMEDIASOURCE_CAN_PAUSE; @@ -1250,13 +1263,20 @@ static HRESULT WINAPI media_source_GetCharacteristics(IMFMediaSource *iface, DWO static HRESULT WINAPI media_source_CreatePresentationDescriptor(IMFMediaSource *iface, IMFPresentationDescriptor **descriptor) { struct media_source *source = impl_from_IMFMediaSource(iface); + HRESULT hr;
TRACE("%p, %p.\n", iface, descriptor);
+ EnterCriticalSection(&source->cs); + if (source->state == SOURCE_SHUTDOWN) - return MF_E_SHUTDOWN; + hr = MF_E_SHUTDOWN; + else + hr = IMFPresentationDescriptor_Clone(source->pres_desc, descriptor);
- return IMFPresentationDescriptor_Clone(source->pres_desc, descriptor); + LeaveCriticalSection(&source->cs); + + return hr; }
static HRESULT WINAPI media_source_Start(IMFMediaSource *iface, IMFPresentationDescriptor *descriptor, @@ -1268,13 +1288,17 @@ static HRESULT WINAPI media_source_Start(IMFMediaSource *iface, IMFPresentationD
TRACE("%p, %p, %p, %p.\n", iface, descriptor, time_format, position);
- if (source->state == SOURCE_SHUTDOWN) - return MF_E_SHUTDOWN; - - if (!(IsEqualIID(time_format, &GUID_NULL))) - return MF_E_UNSUPPORTED_TIME_FORMAT; + EnterCriticalSection(&source->cs);
- if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_START, &command))) + if (source->state == SOURCE_SHUTDOWN) + { + hr = MF_E_SHUTDOWN; + } + else if (!(IsEqualIID(time_format, &GUID_NULL))) + { + hr = MF_E_UNSUPPORTED_TIME_FORMAT; + } + else if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_START, &command))) { command->u.start.descriptor = descriptor; command->u.start.format = *time_format; @@ -1283,6 +1307,8 @@ static HRESULT WINAPI media_source_Start(IMFMediaSource *iface, IMFPresentationD hr = MFPutWorkItem(source->async_commands_queue, &source->async_commands_callback, &command->IUnknown_iface); }
+ LeaveCriticalSection(&source->cs); + return hr; }
@@ -1294,12 +1320,15 @@ static HRESULT WINAPI media_source_Stop(IMFMediaSource *iface)
TRACE("%p.\n", iface);
- if (source->state == SOURCE_SHUTDOWN) - return MF_E_SHUTDOWN; + EnterCriticalSection(&source->cs);
- if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_STOP, &command))) + if (source->state == SOURCE_SHUTDOWN) + hr = MF_E_SHUTDOWN; + else if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_STOP, &command))) hr = MFPutWorkItem(source->async_commands_queue, &source->async_commands_callback, &command->IUnknown_iface);
+ LeaveCriticalSection(&source->cs); + return hr; }
@@ -1311,16 +1340,18 @@ static HRESULT WINAPI media_source_Pause(IMFMediaSource *iface)
TRACE("%p.\n", iface);
- if (source->state == SOURCE_SHUTDOWN) - return MF_E_SHUTDOWN; - - if (source->state != SOURCE_RUNNING) - return MF_E_INVALID_STATE_TRANSITION; + EnterCriticalSection(&source->cs);
- if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_PAUSE, &command))) + if (source->state == SOURCE_SHUTDOWN) + hr = MF_E_SHUTDOWN; + else if (source->state != SOURCE_RUNNING) + hr = MF_E_INVALID_STATE_TRANSITION; + else if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_PAUSE, &command))) hr = MFPutWorkItem(source->async_commands_queue, &source->async_commands_callback, &command->IUnknown_iface);
+ LeaveCriticalSection(&source->cs); + return S_OK; }
@@ -1331,8 +1362,13 @@ static HRESULT WINAPI media_source_Shutdown(IMFMediaSource *iface)
TRACE("%p.\n", iface);
+ EnterCriticalSection(&source->cs); + if (source->state == SOURCE_SHUTDOWN) + { + LeaveCriticalSection(&source->cs); return MF_E_SHUTDOWN; + }
source->state = SOURCE_SHUTDOWN;
@@ -1365,6 +1401,8 @@ static HRESULT WINAPI media_source_Shutdown(IMFMediaSource *iface)
MFUnlockWorkQueue(source->async_commands_queue);
+ LeaveCriticalSection(&source->cs); + return S_OK; }
@@ -1424,6 +1462,8 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, struct media_ object->byte_stream = bytestream; IMFByteStream_AddRef(bytestream); object->rate = 1.0f; + InitializeCriticalSection(&object->cs); + object->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": cs");
if (FAILED(hr = MFCreateEventQueue(&object->event_queue))) goto fail;
From: Giovanni Mascellani gmascellani@codeweavers.com
--- dlls/winegstreamer/media_source.c | 57 ++++++++++++++++++++++--------- 1 file changed, 40 insertions(+), 17 deletions(-)
diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c index f22cf4be08f..c6dae6e4c6d 100644 --- a/dlls/winegstreamer/media_source.c +++ b/dlls/winegstreamer/media_source.c @@ -746,31 +746,51 @@ static HRESULT WINAPI media_stream_QueueEvent(IMFMediaStream *iface, MediaEventT static HRESULT WINAPI media_stream_GetMediaSource(IMFMediaStream *iface, IMFMediaSource **source) { struct media_stream *stream = impl_from_IMFMediaStream(iface); + HRESULT hr;
TRACE("%p, %p.\n", iface, source);
+ EnterCriticalSection(&stream->parent_source->cs); + if (stream->state == STREAM_SHUTDOWN) - return MF_E_SHUTDOWN; + { + hr = MF_E_SHUTDOWN; + } + else + { + IMFMediaSource_AddRef(&stream->parent_source->IMFMediaSource_iface); + *source = &stream->parent_source->IMFMediaSource_iface; + hr = S_OK; + }
- IMFMediaSource_AddRef(&stream->parent_source->IMFMediaSource_iface); - *source = &stream->parent_source->IMFMediaSource_iface; + LeaveCriticalSection(&stream->parent_source->cs);
- return S_OK; + return hr; }
static HRESULT WINAPI media_stream_GetStreamDescriptor(IMFMediaStream* iface, IMFStreamDescriptor **descriptor) { struct media_stream *stream = impl_from_IMFMediaStream(iface); + HRESULT hr;
TRACE("%p, %p.\n", iface, descriptor);
+ EnterCriticalSection(&stream->parent_source->cs); + if (stream->state == STREAM_SHUTDOWN) - return MF_E_SHUTDOWN; + { + hr = MF_E_SHUTDOWN; + } + else + { + IMFStreamDescriptor_AddRef(stream->descriptor); + *descriptor = stream->descriptor; + hr = S_OK; + }
- IMFStreamDescriptor_AddRef(stream->descriptor); - *descriptor = stream->descriptor; + LeaveCriticalSection(&stream->parent_source->cs);
- return S_OK; + return hr; }
static HRESULT WINAPI media_stream_RequestSample(IMFMediaStream *iface, IUnknown *token) @@ -781,21 +801,22 @@ static HRESULT WINAPI media_stream_RequestSample(IMFMediaStream *iface, IUnknown
TRACE("%p, %p.\n", iface, token);
- if (stream->state == STREAM_SHUTDOWN) - return MF_E_SHUTDOWN; + EnterCriticalSection(&stream->parent_source->cs);
- if (stream->state == STREAM_INACTIVE) + if (stream->state == STREAM_SHUTDOWN) + { + hr = MF_E_SHUTDOWN; + } + else if (stream->state == STREAM_INACTIVE) { WARN("Stream isn't active\n"); - return MF_E_MEDIA_SOURCE_WRONGSTATE; + hr = MF_E_MEDIA_SOURCE_WRONGSTATE; } - - if (stream->eos) + else if (stream->eos) { - return MF_E_END_OF_STREAM; + hr = MF_E_END_OF_STREAM; } - - if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_REQUEST_SAMPLE, &command))) + else if (SUCCEEDED(hr = source_create_async_op(SOURCE_ASYNC_REQUEST_SAMPLE, &command))) { command->u.request_sample.stream = stream; if (token) @@ -806,6 +827,8 @@ static HRESULT WINAPI media_stream_RequestSample(IMFMediaStream *iface, IUnknown &stream->parent_source->async_commands_callback, &command->IUnknown_iface); }
+ LeaveCriticalSection(&stream->parent_source->cs); + return hr; }
From: Giovanni Mascellani gmascellani@codeweavers.com
--- dlls/winegstreamer/media_source.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-)
diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c index c6dae6e4c6d..4615abb1602 100644 --- a/dlls/winegstreamer/media_source.c +++ b/dlls/winegstreamer/media_source.c @@ -533,10 +533,20 @@ static void wait_on_sample(struct media_stream *stream, IUnknown *token) struct media_source *source = stream->parent_source; PROPVARIANT empty_var = {.vt = VT_EMPTY}; struct wg_parser_buffer buffer; + bool res;
TRACE("%p, %p\n", stream, token);
- if (wg_parser_stream_get_buffer(source->wg_parser, stream->wg_stream, &buffer)) + LeaveCriticalSection(&source->cs); + res = wg_parser_stream_get_buffer(source->wg_parser, stream->wg_stream, &buffer); + EnterCriticalSection(&source->cs); + + /* If the media source has been shut down during the wait, then + * resources have been released, so don't touch anything. */ + if (source->state == SOURCE_SHUTDOWN) + return; + + if (res) { send_buffer(stream, &buffer, token); } @@ -555,12 +565,18 @@ static HRESULT WINAPI source_async_commands_Invoke(IMFAsyncCallback *iface, IMFA IUnknown *state; HRESULT hr;
- if (source->state == SOURCE_SHUTDOWN) - return S_OK; - if (FAILED(hr = IMFAsyncResult_GetState(result, &state))) return hr;
+ EnterCriticalSection(&source->cs); + + if (source->state == SOURCE_SHUTDOWN) + { + LeaveCriticalSection(&source->cs); + IUnknown_Release(state); + return S_OK; + } + command = impl_from_async_command_IUnknown(state); switch (command->op) { @@ -581,6 +597,8 @@ static HRESULT WINAPI source_async_commands_Invoke(IMFAsyncCallback *iface, IMFA break; }
+ LeaveCriticalSection(&source->cs); + IUnknown_Release(state);
return S_OK;
From: Giovanni Mascellani gmascellani@codeweavers.com
--- dlls/winegstreamer/wg_parser.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/dlls/winegstreamer/wg_parser.c b/dlls/winegstreamer/wg_parser.c index 14970d327c8..520388de7cf 100644 --- a/dlls/winegstreamer/wg_parser.c +++ b/dlls/winegstreamer/wg_parser.c @@ -768,6 +768,13 @@ static void free_stream(struct wg_parser_stream *stream) } gst_object_unref(stream->my_sink);
+ if (stream->buffer) + { + gst_buffer_unmap(stream->buffer, &stream->map_info); + gst_buffer_unref(stream->buffer); + stream->buffer = NULL; + } + pthread_cond_destroy(&stream->event_cond); pthread_cond_destroy(&stream->event_empty_cond);
From: Giovanni Mascellani gmascellani@codeweavers.com
This is required so that Shutdown() won't proceed while a sample request is blocked in wg_parser_stream_get_buffer(). --- dlls/winegstreamer/media_source.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c index 4615abb1602..e5b65804a30 100644 --- a/dlls/winegstreamer/media_source.c +++ b/dlls/winegstreamer/media_source.c @@ -92,6 +92,7 @@ struct media_source IMFMediaEventQueue *event_queue; IMFByteStream *byte_stream;
+ CRITICAL_SECTION shutdown_cs; CRITICAL_SECTION cs;
struct wg_parser *wg_parser; @@ -568,11 +569,13 @@ static HRESULT WINAPI source_async_commands_Invoke(IMFAsyncCallback *iface, IMFA if (FAILED(hr = IMFAsyncResult_GetState(result, &state))) return hr;
+ EnterCriticalSection(&source->shutdown_cs); EnterCriticalSection(&source->cs);
if (source->state == SOURCE_SHUTDOWN) { LeaveCriticalSection(&source->cs); + LeaveCriticalSection(&source->shutdown_cs); IUnknown_Release(state); return S_OK; } @@ -598,6 +601,7 @@ static HRESULT WINAPI source_async_commands_Invoke(IMFAsyncCallback *iface, IMFA }
LeaveCriticalSection(&source->cs); + LeaveCriticalSection(&source->shutdown_cs);
IUnknown_Release(state);
@@ -1239,6 +1243,8 @@ static ULONG WINAPI media_source_Release(IMFMediaSource *iface) IMFMediaEventQueue_Release(source->event_queue); source->cs.DebugInfo->Spare[0] = 0; DeleteCriticalSection(&source->cs); + source->shutdown_cs.DebugInfo->Spare[0] = 0; + DeleteCriticalSection(&source->shutdown_cs); free(source); }
@@ -1403,11 +1409,13 @@ static HRESULT WINAPI media_source_Shutdown(IMFMediaSource *iface)
TRACE("%p.\n", iface);
+ EnterCriticalSection(&source->shutdown_cs); EnterCriticalSection(&source->cs);
if (source->state == SOURCE_SHUTDOWN) { LeaveCriticalSection(&source->cs); + LeaveCriticalSection(&source->shutdown_cs); return MF_E_SHUTDOWN; }
@@ -1443,6 +1451,7 @@ static HRESULT WINAPI media_source_Shutdown(IMFMediaSource *iface) MFUnlockWorkQueue(source->async_commands_queue);
LeaveCriticalSection(&source->cs); + LeaveCriticalSection(&source->shutdown_cs);
return S_OK; } @@ -1503,6 +1512,8 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, struct media_ object->byte_stream = bytestream; IMFByteStream_AddRef(bytestream); object->rate = 1.0f; + InitializeCriticalSection(&object->shutdown_cs); + object->shutdown_cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": shutdown_cs"); InitializeCriticalSection(&object->cs); object->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": cs");
-
Giovanni Mascellani -
Giovanni Mascellani (＠giomasce)