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decoder: optimize pre-allocation of decoder units.

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Optimize pre-allocation of decoder units, thus avoiding un-necessary
memory reallocations. The heuristic used is that we could have around
one slice unit per macroblock line.
This commit is contained in:
Gwenole Beauchesne 2013-01-07 13:59:07 +01:00
parent 4fd99cc989
commit a486d1af66
3 changed files with 16 additions and 6 deletions
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7
gst-libs/gst/vaapi/gstvaapidecoder.c
View file

@ -135,7 +135,8 @@ do_parse(GstVaapiDecoder *decoder,
GstVideoCodecFrame *base_frame, GstAdapter *adapter, gboolean at_eos,
guint *got_unit_size_ptr, gboolean *got_frame_ptr)
{
GstVaapiParserState * const ps = &decoder->priv->parser_state;
GstVaapiDecoderPrivate * const priv = decoder->priv;
GstVaapiParserState * const ps = &priv->parser_state;
GstVaapiDecoderFrame *frame;
GstVaapiDecoderUnit *unit;
GstVaapiDecoderStatus status;
@ -145,7 +146,9 @@ do_parse(GstVaapiDecoder *decoder,
frame = gst_video_codec_frame_get_user_data(base_frame);
if (!frame) {
frame = gst_vaapi_decoder_frame_new();
GstVideoCodecState * const codec_state = priv->codec_state;
frame = gst_vaapi_decoder_frame_new(codec_state->info.width,
codec_state->info.height);
if (!frame)
return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
gst_video_codec_frame_set_user_data(base_frame,

13
gst-libs/gst/vaapi/gstvaapidecoder_frame.c
View file

@ -66,24 +66,31 @@ free_units(GArray **units_ptr)
/**
* gst_vaapi_decoder_frame_new:
* @width: frame width in pixels
* @height: frame height in pixels
*
* Creates a new #GstVaapiDecoderFrame object.
*
* Returns: The newly allocated #GstVaapiDecoderFrame
*/
GstVaapiDecoderFrame *
gst_vaapi_decoder_frame_new(void)
gst_vaapi_decoder_frame_new(guint width, guint height)
{
GstVaapiDecoderFrame *frame;
guint num_slices;
frame = (GstVaapiDecoderFrame *)
gst_vaapi_mini_object_new(gst_vaapi_decoder_frame_class());
if (!frame)
return NULL;
if (!alloc_units(&frame->pre_units, 4))
if (!height)
height = 1088;
num_slices = (height + 15) / 16;
if (!alloc_units(&frame->pre_units, 16))
goto error;
if (!alloc_units(&frame->units, 1))
if (!alloc_units(&frame->units, num_slices))
goto error;
if (!alloc_units(&frame->post_units, 1))
goto error;

2
gst-libs/gst/vaapi/gstvaapidecoder_frame.h
View file

@ -76,7 +76,7 @@ struct _GstVaapiDecoderFrame {
G_GNUC_INTERNAL
GstVaapiDecoderFrame *
gst_vaapi_decoder_frame_new(void);
gst_vaapi_decoder_frame_new(guint width, guint height);
G_GNUC_INTERNAL
void