Commit graph

16 commits

Author SHA1 Message Date
Gwenole Beauchesne
21c95dbc42 encoder: add tuning options API.
Add encoder "tune" option to override the default behaviour that is to
favor maximum decoder compatibility at the expense of lower compression
ratios.

Expected tuning options to be developed are:
- "high-compression": improve compression, target best-in-class decoders;
- "low-latency": tune for low-latency decoding;
- "low-power": tune for encoding in low power / resources conditions.
2014-01-13 17:31:55 +01:00
Gwenole Beauchesne
4a6fbddad6 encoder: clean-ups.
Drop obsolete and unused macros. Add a few doc comments. Slightly
improve indentation of a few leftovers.
2014-01-13 17:31:55 +01:00
Gwenole Beauchesne
850a637d0f encoder: filter out the supported set of rate-control properties.
Only expose the exact static set of supported rate-control properties
to the upper layer. For instance, if the GstVaapiEncoderXXX class does
only support CQP rate control, then only add it the the exposed enum
type.

Add helper macros and functions to build a GType for an enum subset.
2014-01-13 17:31:55 +01:00
Gwenole Beauchesne
59229b20a5 encoder: add keyframe period API.
Add gst_vaapi_encoder_set_keyframe_period() interface to allow the
user control the maximum distance between two keyframes. This new
property can only be set prior to gst_vaapi_encoder_set_codec_state().

A value of zero for "keyframe-period" gets it re-evaluated to the
actual framerate during encoder reconfiguration.
2014-01-13 17:31:55 +01:00
Gwenole Beauchesne
8788ea99a8 encoder: improve codec reconfiguration.
Improve codec reconfiguration to be performed only through a single
function. That is, remove the _set_context_info() hook as subclass
should not alter the parent GstVaapiContextInfo itself. Besides, the
VA context is constructed only at the final stages of reconfigure().
2014-01-13 17:31:55 +01:00
Gwenole Beauchesne
5394c75461 encoder: add video codec-state API.
Add interface to communicate the encoder resolution and related info
like framerate, interlaced vs. progressive, etc. This new interface
supersedes gst_vaapi_encoder_set_format() and doesn't use any GstCaps
but rather use GstVideoCodecState.

Note that gst_vaapi_encoder_set_codec_state() is also a synchronization
point for codec config. This means that the encoder is reconfigured
there to match the latest properties.
2014-01-13 17:31:55 +01:00
Gwenole Beauchesne
dcc7a94408 encoder: add properties API.
Add interface to communicate configurable properties to the encoder.
This covers both the common ones (rate-control, bitrate), and the
codec specific properties.

https://bugzilla.gnome.org/show_bug.cgi?id=719529
2014-01-13 17:31:54 +01:00
Gwenole Beauchesne
70b3600f11 encoder: add bitrate API.
Add gst_vaapi_encoder_set_bitrate() interface to allow the user control
the bitrate for encoding. Currently, changing this parameter is only
valid before the first frame is encoded. Should the value be modified
afterwards, then GST_VAAPI_ENCODER_STATUS_ERROR_OPERATION_FAILED is
returned.

https://bugzilla.gnome.org/show_bug.cgi?id=719529
2014-01-13 17:31:54 +01:00
Gwenole Beauchesne
a24c52e4d0 encoder: add rate control API.
Add gst_vaapi_encoder_set_rate_control() interface to request a new
rate control mode for encoding. Changing the rate control mode is
only valid prior to encoding the very first frame. Afterwards, an
error ("operation-failed") is issued.

https://bugzilla.gnome.org/show_bug.cgi?id=719529
2014-01-13 17:31:54 +01:00
Gwenole Beauchesne
01af353116 encoder: fix indentation. 2014-01-13 17:31:54 +01:00
Gwenole Beauchesne
fd9c855f14 encoder: simplify VA context initialization process.
Change get_context_info() into a set_context_info() function that
initializes common defaults into the base class, thus allowing the
subclasses to specialize the context info further on.

The set_context_info() hook is also the location where additional
context specific data could be initialized. At this point, we are
guaranteed to have valid video resolution size and framerate. i.e.
gst_vaapi_encoder_set_format() was called beforehand.
2013-12-04 19:14:38 +01:00
Gwenole Beauchesne
2f5e5f0784 encoder: clean-ups and document public APIs.
Clean public APIs up so that to better align with the decoder APIs.
Most importantly, gst_vaapi_encoder_get_buffer() is changed to only
return the VA coded buffer proxy. Also provide useful documentation
for the public APIs.
2013-12-04 19:14:38 +01:00
Gwenole Beauchesne
26726b18fc encoder: avoid extra allocations of GstVaapiEncoderSyncPic objects.
Kill GstVaapiEncoderSyncPic objects that are internally and temporarily
allocated. Rather, associate a GstVaapiEncPicture to a coded buffer
through GstVaapiCodedBufferProxy user-data facility.

Besides, use a GAsyncQueue to maintain a thread-safe queue object of
coded buffers.

Partial fix for the following report:
https://bugzilla.gnome.org/show_bug.cgi?id=719530
2013-12-04 19:14:38 +01:00
Gwenole Beauchesne
8ecc35ecf2 encoder: fix subclassing process.
Fix the GstVaapiEncoderClass parent class type. Make sure to validate
subclass hooks as early as possible, i.e. in gst_vaapi_encoder_init(),
thus avoiding useless run-time checks. Also simplify the subclass
initialization process to be less error prone.
2013-12-04 19:14:38 +01:00
Gwenole Beauchesne
0fb7c60508 encoder: rework GstVaapiCodedBuffer and related proxy.
Refactor the GstVaapiCodedBuffer APIs so that to more clearly separate
public and private interfaces. Besides, the map/unmap APIs should not
be exposed as is but appropriate accessors should be provided instead.

* GstVaapiCodedBuffer: VA coded buffer abstraction
- gst_vaapi_coded_buffer_get_size(): get coded buffer size.
- gst_vaapi_coded_buffer_copy_into(): copy coded buffer into GstBuffer

* GstVaapiCodedBufferPool: pool of VA coded buffer objects
- gst_vaapi_coded_buffer_pool_new(): create a pool of coded buffers of
  the specified max size, and bound to the supplied encoder

* GstVaapiCodedBufferProxy: pool-allocated VA coded buffer object proxy
- gst_vaapi_coded_buffer_proxy_new_from_pool(): create coded buf from pool
- gst_vaapi_coded_buffer_proxy_get_buffer(): get underlying coded buffer
- gst_vaapi_coded_buffer_proxy_get_buffer_size(): get coded buffer size

Rationale: more optimized transfer functions might be provided in the
future, thus rendering the map/unmap mechanism obsolete or sub-optimal.

https://bugzilla.gnome.org/show_bug.cgi?id=719775
2013-12-04 19:14:38 +01:00
Wind Yuan
8174a35737 Add initial infrastructure for video encoding.
Add initial API for video encoding: only basic interfaces and small
encoder objects are implemented so far.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
2013-11-24 16:52:05 +01:00