1011 lines
33 KiB
C
1011 lines
33 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/****************************************************************************
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*
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* Module Title : scale.c
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*
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* Description : Image scaling functions.
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*
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***************************************************************************/
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/****************************************************************************
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* Header Files
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****************************************************************************/
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#include "./vpx_scale_rtcd.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vpx_scale/yv12config.h"
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#include "vpx_scale/scale_mode.h"
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typedef struct {
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int expanded_frame_width;
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int expanded_frame_height;
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int HScale;
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int HRatio;
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int VScale;
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int VRatio;
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YV12_BUFFER_CONFIG *src_yuv_config;
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YV12_BUFFER_CONFIG *dst_yuv_config;
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} SCALE_VARS;
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/****************************************************************************
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*
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* ROUTINE : horizontal_line_copy
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*
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* INPUTS : None
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*
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*
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* OUTPUTS : None.
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*
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* RETURNS : None
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*
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* FUNCTION : 1 to 1 scaling up for a horizontal line of pixles
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*
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* SPECIAL NOTES : None.
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*
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* ERRORS : None.
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*
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****************************************************************************/
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static
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void horizontal_line_copy(
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const unsigned char *source,
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unsigned int source_width,
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unsigned char *dest,
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unsigned int dest_width
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) {
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(void) dest_width;
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duck_memcpy(dest, source, source_width);
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}
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/****************************************************************************
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*
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* ROUTINE : null_scale
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*
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* INPUTS : None
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*
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*
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* OUTPUTS : None.
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*
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* RETURNS : None
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*
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* FUNCTION : 1 to 1 scaling up for a vertical band
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*
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* SPECIAL NOTES : None.
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*
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* ERRORS : None.
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*
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****************************************************************************/
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static
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void null_scale(
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unsigned char *dest,
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unsigned int dest_pitch,
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unsigned int dest_width
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) {
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(void) dest;
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(void) dest_pitch;
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(void) dest_width;
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return;
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}
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/****************************************************************************
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*
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* ROUTINE : scale1d_2t1_i
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*
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* INPUTS : const unsigned char *source : Pointer to data to be scaled.
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* int source_step : Number of pixels to step on in source.
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* unsigned int source_scale : Scale for source (UNUSED).
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* unsigned int source_length : Length of source (UNUSED).
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* unsigned char *dest : Pointer to output data array.
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* int dest_step : Number of pixels to step on in destination.
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* unsigned int dest_scale : Scale for destination (UNUSED).
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* unsigned int dest_length : Length of destination.
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Performs 2-to-1 interpolated scaling.
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*
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* SPECIAL NOTES : None.
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*
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****************************************************************************/
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static
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void scale1d_2t1_i
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(
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const unsigned char *source,
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int source_step,
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unsigned int source_scale,
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unsigned int source_length,
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unsigned char *dest,
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int dest_step,
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unsigned int dest_scale,
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unsigned int dest_length
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) {
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unsigned int i, j;
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unsigned int temp;
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int source_pitch = source_step;
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(void) source_length;
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(void) source_scale;
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(void) dest_scale;
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source_step *= 2;
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dest[0] = source[0];
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for (i = dest_step, j = source_step; i < dest_length * dest_step; i += dest_step, j += source_step) {
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temp = 8;
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temp += 3 * source[j - source_pitch];
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temp += 10 * source[j];
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temp += 3 * source[j + source_pitch];
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temp >>= 4;
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dest[i] = (char)(temp);
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}
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}
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/****************************************************************************
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*
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* ROUTINE : scale1d_2t1_ps
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*
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* INPUTS : const unsigned char *source : Pointer to data to be scaled.
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* int source_step : Number of pixels to step on in source.
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* unsigned int source_scale : Scale for source (UNUSED).
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* unsigned int source_length : Length of source (UNUSED).
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* unsigned char *dest : Pointer to output data array.
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* int dest_step : Number of pixels to step on in destination.
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* unsigned int dest_scale : Scale for destination (UNUSED).
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* unsigned int dest_length : Length of destination.
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Performs 2-to-1 point subsampled scaling.
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*
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* SPECIAL NOTES : None.
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*
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****************************************************************************/
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static
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void scale1d_2t1_ps
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(
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const unsigned char *source,
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int source_step,
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unsigned int source_scale,
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unsigned int source_length,
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unsigned char *dest,
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int dest_step,
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unsigned int dest_scale,
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unsigned int dest_length
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) {
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unsigned int i, j;
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(void) source_length;
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(void) source_scale;
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(void) dest_scale;
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source_step *= 2;
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j = 0;
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for (i = 0; i < dest_length * dest_step; i += dest_step, j += source_step)
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dest[i] = source[j];
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}
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/****************************************************************************
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*
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* ROUTINE : scale1d_c
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*
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* INPUTS : const unsigned char *source : Pointer to data to be scaled.
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* int source_step : Number of pixels to step on in source.
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* unsigned int source_scale : Scale for source.
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* unsigned int source_length : Length of source (UNUSED).
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* unsigned char *dest : Pointer to output data array.
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* int dest_step : Number of pixels to step on in destination.
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* unsigned int dest_scale : Scale for destination.
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* unsigned int dest_length : Length of destination.
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Performs linear interpolation in one dimension.
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*
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* SPECIAL NOTES : None.
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*
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****************************************************************************/
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static
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void scale1d_c
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(
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const unsigned char *source,
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int source_step,
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unsigned int source_scale,
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unsigned int source_length,
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unsigned char *dest,
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int dest_step,
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unsigned int dest_scale,
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unsigned int dest_length
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) {
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unsigned int i;
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unsigned int round_value = dest_scale / 2;
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unsigned int left_modifier = dest_scale;
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unsigned int right_modifier = 0;
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unsigned char left_pixel = *source;
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unsigned char right_pixel = *(source + source_step);
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(void) source_length;
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/* These asserts are needed if there are boundary issues... */
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/*assert ( dest_scale > source_scale );*/
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/*assert ( (source_length-1) * dest_scale >= (dest_length-1) * source_scale );*/
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for (i = 0; i < dest_length * dest_step; i += dest_step) {
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dest[i] = (char)((left_modifier * left_pixel + right_modifier * right_pixel + round_value) / dest_scale);
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right_modifier += source_scale;
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while (right_modifier > dest_scale) {
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right_modifier -= dest_scale;
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source += source_step;
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left_pixel = *source;
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right_pixel = *(source + source_step);
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}
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left_modifier = dest_scale - right_modifier;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : Scale2D
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*
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* INPUTS : const unsigned char *source : Pointer to data to be scaled.
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* int source_pitch : Stride of source image.
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* unsigned int source_width : Width of input image.
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* unsigned int source_height : Height of input image.
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* unsigned char *dest : Pointer to output data array.
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* int dest_pitch : Stride of destination image.
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* unsigned int dest_width : Width of destination image.
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* unsigned int dest_height : Height of destination image.
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* unsigned char *temp_area : Pointer to temp work area.
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* unsigned char temp_area_height : Height of temp work area.
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* unsigned int hscale : Horizontal scale factor numerator.
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* unsigned int hratio : Horizontal scale factor denominator.
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* unsigned int vscale : Vertical scale factor numerator.
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* unsigned int vratio : Vertical scale factor denominator.
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* unsigned int interlaced : Interlace flag.
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Performs 2-tap linear interpolation in two dimensions.
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*
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* SPECIAL NOTES : Expansion is performed one band at a time to help with
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* caching.
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*
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****************************************************************************/
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static
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void Scale2D
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(
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/*const*/
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unsigned char *source,
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int source_pitch,
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unsigned int source_width,
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unsigned int source_height,
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unsigned char *dest,
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int dest_pitch,
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unsigned int dest_width,
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unsigned int dest_height,
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unsigned char *temp_area,
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unsigned char temp_area_height,
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unsigned int hscale,
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unsigned int hratio,
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unsigned int vscale,
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unsigned int vratio,
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unsigned int interlaced
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) {
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/*unsigned*/
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int i, j, k;
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int bands;
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int dest_band_height;
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int source_band_height;
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typedef void (*Scale1D)(const unsigned char * source, int source_step, unsigned int source_scale, unsigned int source_length,
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unsigned char * dest, int dest_step, unsigned int dest_scale, unsigned int dest_length);
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Scale1D Scale1Dv = scale1d_c;
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Scale1D Scale1Dh = scale1d_c;
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void (*horiz_line_scale)(const unsigned char *, unsigned int, unsigned char *, unsigned int) = NULL;
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void (*vert_band_scale)(unsigned char *, unsigned int, unsigned char *, unsigned int, unsigned int) = NULL;
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int ratio_scalable = 1;
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int interpolation = 0;
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unsigned char *source_base; /* = (unsigned char *) ((source_pitch >= 0) ? source : (source + ((source_height-1) * source_pitch))); */
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unsigned char *line_src;
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source_base = (unsigned char *)source;
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if (source_pitch < 0) {
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int offset;
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offset = (source_height - 1);
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offset *= source_pitch;
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source_base += offset;
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}
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/* find out the ratio for each direction */
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switch (hratio * 10 / hscale) {
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case 8:
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/* 4-5 Scale in Width direction */
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horiz_line_scale = vp8_horizontal_line_5_4_scale;
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break;
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case 6:
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/* 3-5 Scale in Width direction */
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horiz_line_scale = vp8_horizontal_line_5_3_scale;
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break;
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case 5:
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/* 1-2 Scale in Width direction */
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horiz_line_scale = vp8_horizontal_line_2_1_scale;
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break;
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default:
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/* The ratio is not acceptable now */
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/* throw("The ratio is not acceptable for now!"); */
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ratio_scalable = 0;
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break;
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}
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switch (vratio * 10 / vscale) {
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case 8:
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/* 4-5 Scale in vertical direction */
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vert_band_scale = vp8_vertical_band_5_4_scale;
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source_band_height = 5;
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dest_band_height = 4;
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break;
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case 6:
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/* 3-5 Scale in vertical direction */
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vert_band_scale = vp8_vertical_band_5_3_scale;
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source_band_height = 5;
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dest_band_height = 3;
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break;
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case 5:
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/* 1-2 Scale in vertical direction */
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if (interlaced) {
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/* if the content is interlaced, point sampling is used */
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vert_band_scale = vp8_vertical_band_2_1_scale;
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} else {
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interpolation = 1;
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/* if the content is progressive, interplo */
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vert_band_scale = vp8_vertical_band_2_1_scale_i;
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}
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source_band_height = 2;
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dest_band_height = 1;
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break;
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default:
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/* The ratio is not acceptable now */
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/* throw("The ratio is not acceptable for now!"); */
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ratio_scalable = 0;
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break;
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}
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if (ratio_scalable) {
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if (source_height == dest_height) {
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/* for each band of the image */
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for (k = 0; k < (int)dest_height; k++) {
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horiz_line_scale(source, source_width, dest, dest_width);
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source += source_pitch;
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dest += dest_pitch;
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}
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return;
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}
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if (interpolation) {
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if (source < source_base)
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source = source_base;
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horiz_line_scale(source, source_width, temp_area, dest_width);
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}
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for (k = 0; k < (int)(dest_height + dest_band_height - 1) / dest_band_height; k++) {
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/* scale one band horizontally */
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for (i = 0; i < source_band_height; i++) {
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/* Trap case where we could read off the base of the source buffer */
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line_src = (unsigned char *)source + i * source_pitch;
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if (line_src < source_base)
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line_src = source_base;
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horiz_line_scale(line_src, source_width,
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temp_area + (i + 1)*dest_pitch, dest_width);
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}
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/* Vertical scaling is in place */
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vert_band_scale(temp_area + dest_pitch, dest_pitch, dest, dest_pitch, dest_width);
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if (interpolation)
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vpx_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_width);
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/* Next band... */
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source += (unsigned long) source_band_height * source_pitch;
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dest += (unsigned long) dest_band_height * dest_pitch;
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}
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return;
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}
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if (hscale == 2 && hratio == 1)
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Scale1Dh = scale1d_2t1_ps;
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if (vscale == 2 && vratio == 1) {
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if (interlaced)
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Scale1Dv = scale1d_2t1_ps;
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else
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Scale1Dv = scale1d_2t1_i;
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}
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if (source_height == dest_height) {
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/* for each band of the image */
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for (k = 0; k < (int)dest_height; k++) {
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Scale1Dh(source, 1, hscale, source_width + 1, dest, 1, hratio, dest_width);
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source += source_pitch;
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dest += dest_pitch;
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}
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return;
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}
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if (dest_height > source_height) {
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dest_band_height = temp_area_height - 1;
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source_band_height = dest_band_height * source_height / dest_height;
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} else {
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source_band_height = temp_area_height - 1;
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dest_band_height = source_band_height * vratio / vscale;
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}
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/* first row needs to be done so that we can stay one row ahead for vertical zoom */
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Scale1Dh(source, 1, hscale, source_width + 1, temp_area, 1, hratio, dest_width);
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/* for each band of the image */
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bands = (dest_height + dest_band_height - 1) / dest_band_height;
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for (k = 0; k < bands; k++) {
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/* scale one band horizontally */
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for (i = 1; i < source_band_height + 1; i++) {
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if (k * source_band_height + i < (int) source_height) {
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Scale1Dh(source + i * source_pitch, 1, hscale, source_width + 1,
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temp_area + i * dest_pitch, 1, hratio, dest_width);
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} else { /* Duplicate the last row */
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/* copy temp_area row 0 over from last row in the past */
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duck_memcpy(temp_area + i * dest_pitch, temp_area + (i - 1)*dest_pitch, dest_pitch);
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}
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}
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/* scale one band vertically */
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for (j = 0; j < (int)dest_width; j++) {
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Scale1Dv(&temp_area[j], dest_pitch, vscale, source_band_height + 1,
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&dest[j], dest_pitch, vratio, dest_band_height);
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}
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/* copy temp_area row 0 over from last row in the past */
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duck_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_pitch);
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/* move to the next band */
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source += source_band_height * source_pitch;
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dest += dest_band_height * dest_pitch;
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}
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}
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/****************************************************************************
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*
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* ROUTINE :
|
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*
|
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* INPUTS : YV12_BUFFER_CONFIG *src : Pointer to frame to be scaled.
|
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* YV12_BUFFER_CONFIG *dst : Pointer to buffer to hold scaled frame.
|
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* unsigned char *temp_area : Pointer to temp work area.
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* unsigned char temp_area_height : Height of temp work area.
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* unsigned int hscale : Horizontal scale factor numerator.
|
|
* unsigned int hratio : Horizontal scale factor denominator.
|
|
* unsigned int vscale : Vertical scale factor numerator.
|
|
* unsigned int vratio : Vertical scale factor denominator.
|
|
* unsigned int interlaced : Interlace flag.
|
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*
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* OUTPUTS : None.
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*
|
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* RETURNS : void
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|
*
|
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* FUNCTION : Performs 2-tap linear interpolation in two dimensions.
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|
*
|
|
* SPECIAL NOTES : Expansion is performed one band at a time to help with
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* caching.
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|
*
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|
****************************************************************************/
|
|
void vp8_scale_frame
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|
(
|
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YV12_BUFFER_CONFIG *src,
|
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YV12_BUFFER_CONFIG *dst,
|
|
unsigned char *temp_area,
|
|
unsigned char temp_height,
|
|
unsigned int hscale,
|
|
unsigned int hratio,
|
|
unsigned int vscale,
|
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unsigned int vratio,
|
|
unsigned int interlaced
|
|
) {
|
|
int i;
|
|
int dw = (hscale - 1 + src->y_width * hratio) / hscale;
|
|
int dh = (vscale - 1 + src->y_height * vratio) / vscale;
|
|
|
|
/* call our internal scaling routines!! */
|
|
Scale2D((unsigned char *) src->y_buffer, src->y_stride, src->y_width, src->y_height,
|
|
(unsigned char *) dst->y_buffer, dst->y_stride, dw, dh,
|
|
temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
|
|
|
|
if (dw < (int)dst->y_width)
|
|
for (i = 0; i < dh; i++)
|
|
duck_memset(dst->y_buffer + i * dst->y_stride + dw - 1, dst->y_buffer[i * dst->y_stride + dw - 2], dst->y_width - dw + 1);
|
|
|
|
if (dh < (int)dst->y_height)
|
|
for (i = dh - 1; i < (int)dst->y_height; i++)
|
|
duck_memcpy(dst->y_buffer + i * dst->y_stride, dst->y_buffer + (dh - 2) * dst->y_stride, dst->y_width + 1);
|
|
|
|
Scale2D((unsigned char *) src->u_buffer, src->uv_stride, src->uv_width, src->uv_height,
|
|
(unsigned char *) dst->u_buffer, dst->uv_stride, dw / 2, dh / 2,
|
|
temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
|
|
|
|
if (dw / 2 < (int)dst->uv_width)
|
|
for (i = 0; i < dst->uv_height; i++)
|
|
duck_memset(dst->u_buffer + i * dst->uv_stride + dw / 2 - 1, dst->u_buffer[i * dst->uv_stride + dw / 2 - 2], dst->uv_width - dw / 2 + 1);
|
|
|
|
if (dh / 2 < (int)dst->uv_height)
|
|
for (i = dh / 2 - 1; i < (int)dst->y_height / 2; i++)
|
|
duck_memcpy(dst->u_buffer + i * dst->uv_stride, dst->u_buffer + (dh / 2 - 2)*dst->uv_stride, dst->uv_width);
|
|
|
|
Scale2D((unsigned char *) src->v_buffer, src->uv_stride, src->uv_width, src->uv_height,
|
|
(unsigned char *) dst->v_buffer, dst->uv_stride, dw / 2, dh / 2,
|
|
temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
|
|
|
|
if (dw / 2 < (int)dst->uv_width)
|
|
for (i = 0; i < dst->uv_height; i++)
|
|
duck_memset(dst->v_buffer + i * dst->uv_stride + dw / 2 - 1, dst->v_buffer[i * dst->uv_stride + dw / 2 - 2], dst->uv_width - dw / 2 + 1);
|
|
|
|
if (dh / 2 < (int) dst->uv_height)
|
|
for (i = dh / 2 - 1; i < (int)dst->y_height / 2; i++)
|
|
duck_memcpy(dst->v_buffer + i * dst->uv_stride, dst->v_buffer + (dh / 2 - 2)*dst->uv_stride, dst->uv_width);
|
|
}
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : any_ratio_2d_scale
|
|
*
|
|
* INPUTS : SCALE_INSTANCE *si : Pointer to post-processor instance (NOT USED).
|
|
* const unsigned char *source : Pointer to source image.
|
|
* unsigned int source_pitch : Stride of source image.
|
|
* unsigned int source_width : Width of source image.
|
|
* unsigned int source_height : Height of source image (NOT USED).
|
|
* unsigned char *dest : Pointer to destination image.
|
|
* unsigned int dest_pitch : Stride of destination image.
|
|
* unsigned int dest_width : Width of destination image.
|
|
* unsigned int dest_height : Height of destination image.
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : int: 1 if image scaled, 0 if image could not be scaled.
|
|
*
|
|
* FUNCTION : Scale the image with changing apect ratio.
|
|
*
|
|
* SPECIAL NOTES : This scaling is a bi-linear scaling. Need to re-work the
|
|
* whole function for new scaling algorithm.
|
|
*
|
|
****************************************************************************/
|
|
static
|
|
int any_ratio_2d_scale
|
|
(
|
|
SCALE_VARS *si,
|
|
const unsigned char *source,
|
|
int source_pitch,
|
|
unsigned int source_width,
|
|
unsigned int source_height,
|
|
unsigned char *dest,
|
|
unsigned int dest_pitch,
|
|
unsigned int dest_width,
|
|
unsigned int dest_height
|
|
) {
|
|
unsigned int i, k;
|
|
unsigned int src_band_height = 0;
|
|
unsigned int dest_band_height = 0;
|
|
|
|
/* suggested scale factors */
|
|
int hs = si->HScale;
|
|
int hr = si->HRatio;
|
|
int vs = si->VScale;
|
|
int vr = si->VRatio;
|
|
|
|
/* assume the ratios are scalable instead of should be centered */
|
|
int ratio_scalable = 1;
|
|
|
|
const unsigned char *source_base = ((source_pitch >= 0) ? source : (source + ((source_height - 1) * source_pitch)));
|
|
const unsigned char *line_src;
|
|
|
|
void (*horiz_line_scale)(const unsigned char *, unsigned int, unsigned char *, unsigned int) = NULL;
|
|
void (*vert_band_scale)(unsigned char *, unsigned int, unsigned int) = NULL;
|
|
void (*last_vert_band_scale)(unsigned char *, unsigned int, unsigned int) = NULL;
|
|
|
|
(void) si;
|
|
|
|
/* find out the ratio for each direction */
|
|
switch (hr * 30 / hs) {
|
|
case 24:
|
|
/* 4-5 Scale in Width direction */
|
|
horiz_line_scale = vp8_horizontal_line_4_5_scale;
|
|
break;
|
|
case 22:
|
|
/* 3-4 Scale in Width direction */
|
|
horiz_line_scale = vp8_horizontal_line_3_4_scale;
|
|
break;
|
|
|
|
case 20:
|
|
/* 4-5 Scale in Width direction */
|
|
horiz_line_scale = vp8_horizontal_line_2_3_scale;
|
|
break;
|
|
case 18:
|
|
/* 3-5 Scale in Width direction */
|
|
horiz_line_scale = vp8_horizontal_line_3_5_scale;
|
|
break;
|
|
case 15:
|
|
/* 1-2 Scale in Width direction */
|
|
horiz_line_scale = vp8_horizontal_line_1_2_scale;
|
|
break;
|
|
case 30:
|
|
/* no scale in Width direction */
|
|
horiz_line_scale = horizontal_line_copy;
|
|
break;
|
|
default:
|
|
/* The ratio is not acceptable now */
|
|
/* throw("The ratio is not acceptable for now!"); */
|
|
ratio_scalable = 0;
|
|
break;
|
|
}
|
|
|
|
switch (vr * 30 / vs) {
|
|
case 24:
|
|
/* 4-5 Scale in vertical direction */
|
|
vert_band_scale = vp8_vertical_band_4_5_scale;
|
|
last_vert_band_scale = vp8_last_vertical_band_4_5_scale;
|
|
src_band_height = 4;
|
|
dest_band_height = 5;
|
|
break;
|
|
case 22:
|
|
/* 3-4 Scale in vertical direction */
|
|
vert_band_scale = vp8_vertical_band_3_4_scale;
|
|
last_vert_band_scale = vp8_last_vertical_band_3_4_scale;
|
|
src_band_height = 3;
|
|
dest_band_height = 4;
|
|
break;
|
|
case 20:
|
|
/* 2-3 Scale in vertical direction */
|
|
vert_band_scale = vp8_vertical_band_2_3_scale;
|
|
last_vert_band_scale = vp8_last_vertical_band_2_3_scale;
|
|
src_band_height = 2;
|
|
dest_band_height = 3;
|
|
break;
|
|
case 18:
|
|
/* 3-5 Scale in vertical direction */
|
|
vert_band_scale = vp8_vertical_band_3_5_scale;
|
|
last_vert_band_scale = vp8_last_vertical_band_3_5_scale;
|
|
src_band_height = 3;
|
|
dest_band_height = 5;
|
|
break;
|
|
case 15:
|
|
/* 1-2 Scale in vertical direction */
|
|
vert_band_scale = vp8_vertical_band_1_2_scale;
|
|
last_vert_band_scale = vp8_last_vertical_band_1_2_scale;
|
|
src_band_height = 1;
|
|
dest_band_height = 2;
|
|
break;
|
|
case 30:
|
|
/* no scale in Width direction */
|
|
vert_band_scale = null_scale;
|
|
last_vert_band_scale = null_scale;
|
|
src_band_height = 4;
|
|
dest_band_height = 4;
|
|
break;
|
|
default:
|
|
/* The ratio is not acceptable now */
|
|
/* throw("The ratio is not acceptable for now!"); */
|
|
ratio_scalable = 0;
|
|
break;
|
|
}
|
|
|
|
if (ratio_scalable == 0)
|
|
return ratio_scalable;
|
|
|
|
horiz_line_scale(source, source_width, dest, dest_width);
|
|
|
|
/* except last band */
|
|
for (k = 0; k < (dest_height + dest_band_height - 1) / dest_band_height - 1; k++) {
|
|
/* scale one band horizontally */
|
|
for (i = 1; i < src_band_height; i++) {
|
|
/* Trap case where we could read off the base of the source buffer */
|
|
line_src = source + i * source_pitch;
|
|
|
|
if (line_src < source_base)
|
|
line_src = source_base;
|
|
|
|
horiz_line_scale(line_src, source_width,
|
|
dest + i * dest_pitch, dest_width);
|
|
}
|
|
|
|
/* first line of next band */
|
|
/* Trap case where we could read off the base of the source buffer */
|
|
line_src = source + src_band_height * source_pitch;
|
|
|
|
if (line_src < source_base)
|
|
line_src = source_base;
|
|
|
|
horiz_line_scale(line_src, source_width,
|
|
dest + dest_band_height * dest_pitch,
|
|
dest_width);
|
|
|
|
/* Vertical scaling is in place */
|
|
vert_band_scale(dest, dest_pitch, dest_width);
|
|
|
|
/* Next band... */
|
|
source += src_band_height * source_pitch;
|
|
dest += dest_band_height * dest_pitch;
|
|
}
|
|
|
|
/* scale one band horizontally */
|
|
for (i = 1; i < src_band_height; i++) {
|
|
/* Trap case where we could read off the base of the source buffer */
|
|
line_src = source + i * source_pitch;
|
|
|
|
if (line_src < source_base)
|
|
line_src = source_base;
|
|
|
|
horiz_line_scale(line_src, source_width,
|
|
dest + i * dest_pitch,
|
|
dest_width);
|
|
}
|
|
|
|
/* Vertical scaling is in place */
|
|
last_vert_band_scale(dest, dest_pitch, dest_width);
|
|
|
|
return ratio_scalable;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : any_ratio_frame_scale
|
|
*
|
|
* INPUTS : SCALE_INSTANCE *si : Pointer to post-processor instance (NOT USED).
|
|
* unsigned char *frame_buffer : Pointer to source image.
|
|
* int YOffset : Offset from start of buffer to Y samples.
|
|
* int UVOffset : Offset from start of buffer to UV samples.
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : int: 1 if image scaled, 0 if image could not be scaled.
|
|
*
|
|
* FUNCTION : Scale the image with changing apect ratio.
|
|
*
|
|
* SPECIAL NOTES : None.
|
|
*
|
|
****************************************************************************/
|
|
static
|
|
int any_ratio_frame_scale(SCALE_VARS *scale_vars, int YOffset, int UVOffset) {
|
|
int i;
|
|
int ew;
|
|
int eh;
|
|
|
|
/* suggested scale factors */
|
|
int hs = scale_vars->HScale;
|
|
int hr = scale_vars->HRatio;
|
|
int vs = scale_vars->VScale;
|
|
int vr = scale_vars->VRatio;
|
|
|
|
int ratio_scalable = 1;
|
|
|
|
int sw = (scale_vars->expanded_frame_width * hr + hs - 1) / hs;
|
|
int sh = (scale_vars->expanded_frame_height * vr + vs - 1) / vs;
|
|
int dw = scale_vars->expanded_frame_width;
|
|
int dh = scale_vars->expanded_frame_height;
|
|
YV12_BUFFER_CONFIG *src_yuv_config = scale_vars->src_yuv_config;
|
|
YV12_BUFFER_CONFIG *dst_yuv_config = scale_vars->dst_yuv_config;
|
|
|
|
if (hr == 3)
|
|
ew = (sw + 2) / 3 * 3 * hs / hr;
|
|
else
|
|
ew = (sw + 7) / 8 * 8 * hs / hr;
|
|
|
|
if (vr == 3)
|
|
eh = (sh + 2) / 3 * 3 * vs / vr;
|
|
else
|
|
eh = (sh + 7) / 8 * 8 * vs / vr;
|
|
|
|
ratio_scalable = any_ratio_2d_scale(scale_vars,
|
|
(const unsigned char *)src_yuv_config->y_buffer,
|
|
src_yuv_config->y_stride, sw, sh,
|
|
(unsigned char *) dst_yuv_config->y_buffer + YOffset,
|
|
dst_yuv_config->y_stride, dw, dh);
|
|
|
|
for (i = 0; i < eh; i++)
|
|
duck_memset(dst_yuv_config->y_buffer + YOffset + i * dst_yuv_config->y_stride + dw, 0, ew - dw);
|
|
|
|
for (i = dh; i < eh; i++)
|
|
duck_memset(dst_yuv_config->y_buffer + YOffset + i * dst_yuv_config->y_stride, 0, ew);
|
|
|
|
if (ratio_scalable == 0)
|
|
return ratio_scalable;
|
|
|
|
sw = (sw + 1) >> 1;
|
|
sh = (sh + 1) >> 1;
|
|
dw = (dw + 1) >> 1;
|
|
dh = (dh + 1) >> 1;
|
|
|
|
any_ratio_2d_scale(scale_vars,
|
|
(const unsigned char *)src_yuv_config->u_buffer,
|
|
src_yuv_config->y_stride / 2, sw, sh,
|
|
(unsigned char *)dst_yuv_config->u_buffer + UVOffset,
|
|
dst_yuv_config->uv_stride, dw, dh);
|
|
|
|
any_ratio_2d_scale(scale_vars,
|
|
(const unsigned char *)src_yuv_config->v_buffer,
|
|
src_yuv_config->y_stride / 2, sw, sh,
|
|
(unsigned char *)dst_yuv_config->v_buffer + UVOffset,
|
|
dst_yuv_config->uv_stride, dw, dh);
|
|
|
|
return ratio_scalable;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : center_image
|
|
*
|
|
* INPUTS : SCALE_INSTANCE *si : Pointer to post-processor instance.
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : void
|
|
*
|
|
* FUNCTION : Centers the image without scaling in the output buffer.
|
|
*
|
|
* SPECIAL NOTES : None.
|
|
*
|
|
****************************************************************************/
|
|
static void
|
|
center_image(YV12_BUFFER_CONFIG *src_yuv_config, YV12_BUFFER_CONFIG *dst_yuv_config) {
|
|
int i;
|
|
int row_offset, col_offset;
|
|
unsigned char *src_data_pointer;
|
|
unsigned char *dst_data_pointer;
|
|
|
|
/* center values */
|
|
row_offset = (dst_yuv_config->y_height - src_yuv_config->y_height) / 2;
|
|
col_offset = (dst_yuv_config->y_width - src_yuv_config->y_width) / 2;
|
|
|
|
/* Y's */
|
|
src_data_pointer = src_yuv_config->y_buffer;
|
|
dst_data_pointer = (unsigned char *)dst_yuv_config->y_buffer + (row_offset * dst_yuv_config->y_stride) + col_offset;
|
|
|
|
for (i = 0; i < src_yuv_config->y_height; i++) {
|
|
duck_memcpy(dst_data_pointer, src_data_pointer, src_yuv_config->y_width);
|
|
dst_data_pointer += dst_yuv_config->y_stride;
|
|
src_data_pointer += src_yuv_config->y_stride;
|
|
}
|
|
|
|
row_offset /= 2;
|
|
col_offset /= 2;
|
|
|
|
/* U's */
|
|
src_data_pointer = src_yuv_config->u_buffer;
|
|
dst_data_pointer = (unsigned char *)dst_yuv_config->u_buffer + (row_offset * dst_yuv_config->uv_stride) + col_offset;
|
|
|
|
for (i = 0; i < src_yuv_config->uv_height; i++) {
|
|
duck_memcpy(dst_data_pointer, src_data_pointer, src_yuv_config->uv_width);
|
|
dst_data_pointer += dst_yuv_config->uv_stride;
|
|
src_data_pointer += src_yuv_config->uv_stride;
|
|
}
|
|
|
|
/* V's */
|
|
src_data_pointer = src_yuv_config->v_buffer;
|
|
dst_data_pointer = (unsigned char *)dst_yuv_config->v_buffer + (row_offset * dst_yuv_config->uv_stride) + col_offset;
|
|
|
|
for (i = 0; i < src_yuv_config->uv_height; i++) {
|
|
duck_memcpy(dst_data_pointer, src_data_pointer, src_yuv_config->uv_width);
|
|
dst_data_pointer += dst_yuv_config->uv_stride;
|
|
src_data_pointer += src_yuv_config->uv_stride;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : scale_or_center
|
|
*
|
|
* INPUTS : SCALE_INSTANCE *si : Pointer to post-processor instance.
|
|
*
|
|
*
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : void
|
|
*
|
|
* FUNCTION : Decides to scale or center image in scale buffer for blit
|
|
*
|
|
* SPECIAL NOTES : None.
|
|
*
|
|
****************************************************************************/
|
|
void
|
|
vp8_yv12_scale_or_center
|
|
(
|
|
YV12_BUFFER_CONFIG *src_yuv_config,
|
|
YV12_BUFFER_CONFIG *dst_yuv_config,
|
|
int expanded_frame_width,
|
|
int expanded_frame_height,
|
|
int scaling_mode,
|
|
int HScale,
|
|
int HRatio,
|
|
int VScale,
|
|
int VRatio
|
|
) {
|
|
/*if ( ppi->post_processing_level )
|
|
update_umvborder ( ppi, frame_buffer );*/
|
|
|
|
|
|
switch (scaling_mode) {
|
|
case SCALE_TO_FIT:
|
|
case MAINTAIN_ASPECT_RATIO: {
|
|
SCALE_VARS scale_vars;
|
|
/* center values */
|
|
#if 1
|
|
int row = (dst_yuv_config->y_height - expanded_frame_height) / 2;
|
|
int col = (dst_yuv_config->y_width - expanded_frame_width) / 2;
|
|
/*int YOffset = row * dst_yuv_config->y_width + col;
|
|
int UVOffset = (row>>1) * dst_yuv_config->uv_width + (col>>1);*/
|
|
int YOffset = row * dst_yuv_config->y_stride + col;
|
|
int UVOffset = (row >> 1) * dst_yuv_config->uv_stride + (col >> 1);
|
|
#else
|
|
int row = (src_yuv_config->y_height - expanded_frame_height) / 2;
|
|
int col = (src_yuv_config->y_width - expanded_frame_width) / 2;
|
|
int YOffset = row * src_yuv_config->y_width + col;
|
|
int UVOffset = (row >> 1) * src_yuv_config->uv_width + (col >> 1);
|
|
#endif
|
|
|
|
scale_vars.dst_yuv_config = dst_yuv_config;
|
|
scale_vars.src_yuv_config = src_yuv_config;
|
|
scale_vars.HScale = HScale;
|
|
scale_vars.HRatio = HRatio;
|
|
scale_vars.VScale = VScale;
|
|
scale_vars.VRatio = VRatio;
|
|
scale_vars.expanded_frame_width = expanded_frame_width;
|
|
scale_vars.expanded_frame_height = expanded_frame_height;
|
|
|
|
/* perform center and scale */
|
|
any_ratio_frame_scale(&scale_vars, YOffset, UVOffset);
|
|
|
|
break;
|
|
}
|
|
case CENTER:
|
|
center_image(src_yuv_config, dst_yuv_config);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|