Our context is non-persistent, and we propagate it throughout the
pipeline. This means that if we try to reuse any gstmsdk element by
removing it from the pipeline and then re-adding it, we'll clone the
mfxSession and create a new gstmsdk context as a child of the old one
inside `gst_msdk_context_new_with_parent()`.
Normally this only allocates a few KB inside the driver, but on
Windows it seems to allocate tens of MBs which leads to linearly
increasing memory usage for each PLAYING->NULL->PLAYING state cycle
for the process. The contexts will only be freed when the pipeline
itself goes to `NULL`, which would defeat the purpose of dynamic
pipelines.
Essentially, we need to optimize the case in which the element is
removed from the pipeline and re-added and the same context is re-set
on it. To detect that case, we set the context on `old_context`, and
compare it to the new one when preparing the context. If they're the
same, we don't need to do anything.
Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/946
Split it out into a separate function with early exits to make the
flow clearer, and document what the function is doing clearly.
No functional changes.
Before this change decoder used the oldest frame in the list to pair it
with the decoded surface. This only works when there's a perfect stream
like HEADERS,SYNCPOINT,DELTA...
When playing RTSP streams we can get imperfect streams like HEADERS,
DELTA,SYNCPOINT,DELTA... In this case decoder drops the frames
between HEADERS and SYNCPOINT which leads into using wrong PTS on
the output frames.
With this change we inject the input PTS into the bitstream and use it
to align the internal frame list with the actually decoded position.
Fixes playback with:
```
gst-launch-1.0 rtspsrc location=... latency=0 drop-on-latency=1 ! ...
```
Commit a1584b6 caused big performance drop if the downstream element
is not a msdk element because it is very slow to read data from video
memory directly.
This reverts commit a1584b6f99.
The block that sets use_video_memory flag is after the
the condition `if gst_msdk_context_prepare` but it
always returns false when there is no other msdk elements.
So the decoder ends up with use_video_memory as FALSE.
Note that msdkvpp always set use_video_memory as TRUE.
When use_video_memory is FALSE then the msdkdec allocates
the output frames with posix_memalign (see gstmsdksystemmemory.c).
The result is then copied back to the GstVideoPool's buffers
(or to the downstream pool's buffers if any).
When use_video_memory is TRUE then the msdkdec uses vaCreateSurfaces
to create vaapi surfaces for the hw decoder to decode into
(see gstmsdkvideomemory.c). The result is then copied to either
the internal GstVideoPool and to the downstream pool if any.
(vaDeriveImage/vaMapBuffer is used in order to read the surfaces)
Use boolean instead of GstFlowReturn as declared.
Note that since base class does not check return value of GstVideoDecoder::flush(),
this would not cause any change of behavior.
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/merge_requests/924
is trying to use video memory for decoding on Linux, which reveals a
hidden bug in msdkdec.
For video memory, it is possible that a locked mfx surface is not used
indeed and it will be un-locked later in MSDK, so we have to check the
associated MSDK surface to find out and free un-used surfaces, otherwise
it is easy to exhaust all pre-allocated mfx surfaces and get errors below:
0:00:00.777324879 27290 0x564b65a510a0 ERROR default
gstmsdkvideomemory.c:77:gst_msdk_video_allocator_get_surface: failed to
get surface available
0:00:00.777429079 27290 0x564b65a510a0 ERROR msdkbufferpool
gstmsdkbufferpool.c:260:gst_msdk_buffer_pool_alloc_buffer:<msdkbufferpool0>
failed to create new MSDK memory
Note the sample code in MSDK does similar thing in
CBuffering::SyncFrameSurfaces()
Otherwise GstVideoDecoder is not finalized and
resources are leaked.
Somehow GST_TRACERS="leaks" GST_DEBUG="GST_TRACER:7" did not catch it.
Valgrind output:
==31645== 22,480 (1,400 direct, 21,080 indirect) bytes in 5 blocks are definitely lost in loss record 5,042 of 5,049
==31645== at 0x4C2FB0F: malloc
==31645== by 0x51D9E88: g_malloc
==31645== by 0x51FA7B5: g_slice_alloc
==31645== by 0x51FAC68: g_slice_alloc0
==31645== by 0x58D9984: g_type_create_instance
==31645== by 0x58BA344: g_object_new_with_properties
==31645== by 0x58BADA0: g_object_new
==31645== by 0x8ECA966: gst_video_decoder_init
==31645== by 0x58D99E7: g_type_create_instance
==31645== by 0x58BA344: g_object_new_with_properties
Can happen if the oldest frame is the current frame
and if gst_video_decoder_finish_frame failed in which
case the current is unref and then drop instead of
just drop.
This patch also removes some assumptions, it was strange
to call unref and finish_frame in gst_msdkdec_finish_task.
In principle when owning a frame, the code should either
unref, or drop or finish.
The for loop in gst_msdkdec_handle_frame is error prone
about how it manages surfaces. Because sometimes it sets
the surface variable to NULL and sometimes it needs to free
it right away. So better to print an error if surfaces are
leaked to help with any change around the loop.
Can be reproduced with:
videotestsrc ! x264enc key-int-max=$N ! \
h264parse ! msdkh264dec ! fakesink sync=1
It happens with any gop size but the smaller is the distance N
between key frames, the quicker it is leaking.
Fixes#1023
Instead of using a proxy of `is_packetized` flag this patch
replaces it with the accessor to that flag in decoder base class,
avoiding probable mismatches.
commit 55c0d720 added the capability to handle non-packetized bitstream,
and there is a loop to handle multiple frames in a non-packetized buffer
in gst_msdkdec_handle_frame. However it is possible that a
non-packetized buffer still contains valid data but there is no long any
pending unfinished frame. Currently gst_video_decoder_decode_frame is
invoked to send a new frame with new input data, the situaltion is
repeated till an EOS is received. An application has to exit when
receiving an EOS, however there is still valid data in a
non-packetezied input buffer, hence some frames are dropped.
This fix adds a parse callback for non-packeteized input, a new frame
will be sent to the subclass as soon as the input buffer has valid data
This fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/665
When postpone_free_surface is TRUE, the output buffer is not writable,
however the base decoder needs a writable buffer as output buffer,
otherwise it will make a copy of the output buffer. As the underlying
memory is always lockable, so we may set the LOCKABLE flag for this buffer
to avoid buffer copy in the base class.
The refcount of the output buffer is 1 when postpone_free_surface is
FALSE, so needn't set the LOCKABLE flag for this case.
For a skipped frame in VC1, MSDK returns the mfx surface of the reference
frame, so we have to make sure the corresponding surface for the
reference frame is not freed. In this fix, we postpone surface free because
we don't know whether a surface is referenced
Before this fix, the error is like as below:
New clock: GstSystemClock
0:00:00.181793130 23098 0x55f8a9d622d0 ERROR msdkdec
gstmsdkdec.c:622:gst_msdkdec_finish_task:<msdkvc1dec0> Couldn't find the
cached MSDK surface
Sample pipeline:
gst-launch-1.0 filesrc location=input_has_skipped_frame.wmv ! asfdemux !
vc1parse ! msdkvc1dec ! glimagesink
If the surface is not in use, we may release it even if GST_FLOW_OK is going
to be returned, which may avoid the issue of failing to get surface
available
This fixes the regression caused by commit c05acf4
Add new macro for sink/src pad template to ensure no DMABuf caps
features are exposed on Windows. Some DMABuf caps features
were not handled by the commit 9ec62418c3
DecodedOrder was deprecated in msdk-2017 version, but some customers
still use this for low-latency streaming of non-b-frame encoded streams,
which needs to output the frame at once
Both g_list_delete_link and g_list_remove remove an element and free it,
so l->next is invalid (catched by valgrind) after calling g_list_delete_link
or g_list_remove
gst_msdkdec_finish_task() may release all frames in
GstVideoDecoder object. In this case, allocate_output_buffer()
cannot get the oldest frame to allocate buffer.
So gst_msdkdec_handle_frame() should return GST_FLOW_OK for
letting gst_video_decoder_decode_frame() to send a new frame
for decoding.
Fixes#664.
Fixes#665.
Currently h264parser produces a field or a frame for
alignment=au for interlaced streams, but the flag
MFX_BITSTREAM_COMPLETE_FRAME needs a complete frame
or complementary field pair of data, this results in
broken images being output.
Some patches have been sent out to fix h264parser,
but they are pending on some unfinished work. In
order to make gstreamer-msdk decoding work properly
for interlaced streams before h264parser is fixed,
this flag will be removed temporarily and will be
added back once h264parser if fixed.
Related to:
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/merge_requests/399https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/merge_requests/228
It is possible that the output region size (e.g. 192x144) is different
from the coded picture size (e.g. 192x256). We may adjust the alignment
parameters so that the padding is respected in GstVideoInfo and use
GstVideoInfo to calculate mfx frame width and height
This fixes the error below when decoding a stream which has different
output region size and coded picture size
0:00:00.057726900 28634 0x55df6c3220a0 ERROR msdkdec
gstmsdkdec.c:1065:gst_msdkdec_handle_frame:<msdkh265dec0>
DecodeFrameAsync failed (failed to allocate memory)
Sample pipeline:
gst-launch-1.0 filesrc location=output.h265 ! h265parse ! msdkh265dec !
glimagesink
A post_configure virtual method is added to allow
codec subclasses to adjust the initialized parameters
after MFXVideoDECODE_DecodeHeader is called from the
gstmsdkdec::gst_msdkdec_handle_frame function.
This is useful if codecs want to adjust the output
parameters based on the codec-specific decoding
options that are present in the mfxInfoMFX structure
after MFXVideoDECODE_DecodeHeader initializes them.
The workaround for https://github.com/Intel-Media-SDK/MediaSDK/issues/1139
is required for vp8 only, so move this workaround to the corresponding
postinit_decoder function
The pipeline below works with this change
gst-launch-1.0 filesrc location=SA10104.vc1 ! \
'video/x-wmv,profile=(string)advanced',width=720,height=480,framerate=14/1 ! \
msdkvc1dec ! fakesink
MFXVideoDECODE_DecodeHeader only parses the sequence layer for VC1, so
the structure is unknown for a stream with interlace flag set in the
sequence layer. If forcing the struct to progressive in this plugin,
MediaSDK will fail to decode such streams.
It is possible MFXVideoDECODE_DecodeFrameAsync returns MFX_ERR_INCOMPATIBLE_VIDEO_PARAM
and this error can't be recovered by retrying MFXVideoDECODE_DecodeFrameAsync
in some cases, so we need to limit the number of retries to avoid infinite loop.
This fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/909
Returning MFX_ERR_INCOMPATIBLE_VIDEO_PARAM from
MFXVideoDECODE_DecodeFrameAsync means the allocated mfx surface is not
suitable for the current frame, we need a new mfx surface and try
MFXVideoDECODE_DecodeFrameAsync again.
When MFXVideoDECODE_DecodeFrameAsync () returns MFX_WRN_DEVICE_BUSY with
an output surface, a new input surface is required when retrying
MFXVideoDECODE_DecodeFrameAsync ().
This fixes the out-of-surface issue mentioned in
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/890
An output surface is returned but without sync point when when
MFXVideoDECODE_DecodeFrameAsync () returns MFX_ERR_MORE_DATA, this
surface should be released too, otherwise the surface is occupied
and it is easy to exhaust all pre-allocated mfx surfaces.
Example pipeline (input_vp8.webm contains lots of frame with show_frame
set to 0):
gst-launch-1.0 filesrc location=input_vp8.webm ! matroskademux !
msdkvp8dec ! msdkvpp ! fakesink
0:00:05.995959693 19866 0x563f30f14590 ERROR default
gstmsdkvideomemory.c:77:gst_msdk_video_allocator_get_surface: failed to
get surface available
ERROR: from element
/GstPipeline:pipeline0/GstMatroskaDemux:matroskademux0: Internal data
stream error.
The input buffer is released in gst_msdkdec_finish_task () when decoding
some special clips however this buffer is still in use, so ref the input
buffer before gst_msdkdec_finish_task () and unref it at the end of
gst_msdkdec_handle_frame ().
Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/862
