vpx/vpx_scale/generic/yv12config.c
Henrik Lundin 67fb3a5155 Implement error tracking in the decoder
A new vpx_codec_control called VP8D_GET_FRAME_CORRUPTED. The output
from the function is non-zero if the last decoded frame contains
corruption due to packet losses.

The decoder is also modified to accept encoded frames of zero length.
A zero length frame indicates to the decoder that one or more frames
have been completely lost. This will mark the last decoded reference
buffer as corrupted. The data pointer can be NULL if the length is
zero.

Change-Id: Ic5902c785a281c6e05329deea958554b7a6c75ce
2011-01-19 09:53:21 +01:00

115 lines
3.3 KiB
C

/*
* 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;
ybf->corrupted = 0; /* assume not currupted by errors */
}
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;
}