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/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vpx_scale/yv12config.h"
#include "vpx_mem/vpx_mem.h"
/****************************************************************************
* Exports
****************************************************************************/
/****************************************************************************
*
****************************************************************************/
int
vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf)
{
if (ybf)
{
if (ybf->buffer_alloc)
{
duck_free(ybf->buffer_alloc);
}
ybf->buffer_alloc = 0;
}
else
{
return -1;
}
return 0;
}
/****************************************************************************
*
****************************************************************************/
int
vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, int border)
{
//NOTE:
int yplane_size = (height + 2 * border) * (width + 2 * border);
int uvplane_size = ((1 + height) / 2 + border) * ((1 + width) / 2 + border);
if (ybf)
{
vp8_yv12_de_alloc_frame_buffer(ybf);
ybf->y_width = width;
ybf->y_height = height;
ybf->y_stride = width + 2 * border;
ybf->uv_width = (1 + width) / 2;
ybf->uv_height = (1 + height) / 2;
ybf->uv_stride = ybf->uv_width + border;
ybf->border = border;
ybf->frame_size = yplane_size + 2 * uvplane_size;
// Added 2 extra lines to framebuffer so that copy12x12 doesn't fail
// when we have a large motion vector in V on the last v block.
// Note : We never use these pixels anyway so this doesn't hurt.
ybf->buffer_alloc = (unsigned char *) duck_memalign(32, ybf->frame_size + (ybf->y_stride * 2) + 32, 0);
if (ybf->buffer_alloc == NULL)
return -1;
ybf->y_buffer = ybf->buffer_alloc + (border * ybf->y_stride) + border;
if (yplane_size & 0xf)
yplane_size += 16 - (yplane_size & 0xf);
ybf->u_buffer = ybf->buffer_alloc + yplane_size + (border / 2 * ybf->uv_stride) + border / 2;
ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + (border / 2 * ybf->uv_stride) + border / 2;
}
else
{
return -2;
}
return 0;
}
/****************************************************************************
*
****************************************************************************/
int
vp8_yv12_black_frame_buffer(YV12_BUFFER_CONFIG *ybf)
{
if (ybf)
{
if (ybf->buffer_alloc)
{
duck_memset(ybf->y_buffer, 0x0, ybf->y_stride * ybf->y_height);
duck_memset(ybf->u_buffer, 0x80, ybf->uv_stride * ybf->uv_height);
duck_memset(ybf->v_buffer, 0x80, ybf->uv_stride * ybf->uv_height);
}
return 0;
}
return -1;
}
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