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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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a486d1af66
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.
146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*
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* gstvaapidecoder_frame.c - VA decoder frame
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*
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* Copyright (C) 2012 Intel Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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/**
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* SECTION:gstvaapidecoder_frame
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* @short_description: VA decoder frame
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*/
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#include "sysdeps.h"
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#include "gstvaapidecoder_frame.h"
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static inline const GstVaapiMiniObjectClass *
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gst_vaapi_decoder_frame_class(void)
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{
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static const GstVaapiMiniObjectClass GstVaapiDecoderFrameClass = {
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sizeof(GstVaapiDecoderFrame),
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(GDestroyNotify)gst_vaapi_decoder_frame_free
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};
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return &GstVaapiDecoderFrameClass;
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}
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static inline gboolean
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alloc_units(GArray **units_ptr, guint size)
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{
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GArray *units;
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units = g_array_sized_new(FALSE, FALSE, sizeof(GstVaapiDecoderUnit), size);
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*units_ptr = units;
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return units != NULL;
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}
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static inline void
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free_units(GArray **units_ptr)
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{
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GArray * const units = *units_ptr;
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guint i;
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if (units) {
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for (i = 0; i < units->len; i++) {
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GstVaapiDecoderUnit * const unit =
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&g_array_index(units, GstVaapiDecoderUnit, i);
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gst_vaapi_decoder_unit_clear(unit);
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}
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g_array_free(units, TRUE);
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*units_ptr = NULL;
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}
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}
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/**
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* gst_vaapi_decoder_frame_new:
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* @width: frame width in pixels
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* @height: frame height in pixels
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*
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* Creates a new #GstVaapiDecoderFrame object.
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*
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* Returns: The newly allocated #GstVaapiDecoderFrame
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*/
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GstVaapiDecoderFrame *
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gst_vaapi_decoder_frame_new(guint width, guint height)
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{
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GstVaapiDecoderFrame *frame;
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guint num_slices;
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frame = (GstVaapiDecoderFrame *)
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gst_vaapi_mini_object_new(gst_vaapi_decoder_frame_class());
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if (!frame)
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return NULL;
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if (!height)
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height = 1088;
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num_slices = (height + 15) / 16;
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if (!alloc_units(&frame->pre_units, 16))
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goto error;
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if (!alloc_units(&frame->units, num_slices))
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goto error;
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if (!alloc_units(&frame->post_units, 1))
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goto error;
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frame->output_offset = 0;
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return frame;
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error:
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gst_vaapi_decoder_frame_unref(frame);
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return NULL;
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}
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/**
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* gst_vaapi_decoder_frame_free:
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* @frame: a #GstVaapiDecoderFrame
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*
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* Deallocates any internal resources bound to the supplied decoder
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* @frame.
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*
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* @note This is an internal function used to implement lightweight
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* sub-classes.
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*/
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void
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gst_vaapi_decoder_frame_free(GstVaapiDecoderFrame *frame)
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{
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free_units(&frame->units);
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free_units(&frame->pre_units);
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free_units(&frame->post_units);
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}
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/**
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* gst_vaapi_decoder_frame_append_unit:
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* @frame: a #GstVaapiDecoderFrame
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* @unit: a #GstVaapiDecoderUnit
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*
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* Appends unit to the @frame.
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*/
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void
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gst_vaapi_decoder_frame_append_unit(GstVaapiDecoderFrame *frame,
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GstVaapiDecoderUnit *unit)
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{
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GArray **unit_array_ptr;
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unit->offset = frame->output_offset;
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frame->output_offset += unit->size;
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if (GST_VAAPI_DECODER_UNIT_IS_SLICE(unit))
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unit_array_ptr = &frame->units;
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else if (GST_VAAPI_DECODER_UNIT_IS_FRAME_END(unit))
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unit_array_ptr = &frame->post_units;
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else
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unit_array_ptr = &frame->pre_units;
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g_array_append_val(*unit_array_ptr, *unit);
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}
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