Index: source/libvpx/vpx_scale/generic/vpxscale.c |
=================================================================== |
--- source/libvpx/vpx_scale/generic/vpxscale.c (revision 177019) |
+++ source/libvpx/vpx_scale/generic/vpxscale.c (working copy) |
@@ -1,530 +0,0 @@ |
-/* |
- * 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. |
- */ |
- |
- |
-/**************************************************************************** |
- * |
- * Module Title : scale.c |
- * |
- * Description : Image scaling functions. |
- * |
- ***************************************************************************/ |
- |
-/**************************************************************************** |
-* Header Files |
-****************************************************************************/ |
-#include "./vpx_scale_rtcd.h" |
-#include "vpx_mem/vpx_mem.h" |
-#include "vpx_scale/yv12config.h" |
- |
-typedef struct { |
- int expanded_frame_width; |
- int expanded_frame_height; |
- |
- int HScale; |
- int HRatio; |
- int VScale; |
- int VRatio; |
- |
- YV12_BUFFER_CONFIG *src_yuv_config; |
- YV12_BUFFER_CONFIG *dst_yuv_config; |
- |
-} SCALE_VARS; |
- |
-/**************************************************************************** |
- * |
- * ROUTINE : scale1d_2t1_i |
- * |
- * INPUTS : const unsigned char *source : Pointer to data to be scaled. |
- * int source_step : Number of pixels to step on in source. |
- * unsigned int source_scale : Scale for source (UNUSED). |
- * unsigned int source_length : Length of source (UNUSED). |
- * unsigned char *dest : Pointer to output data array. |
- * int dest_step : Number of pixels to step on in destination. |
- * unsigned int dest_scale : Scale for destination (UNUSED). |
- * unsigned int dest_length : Length of destination. |
- * |
- * OUTPUTS : None. |
- * |
- * RETURNS : void |
- * |
- * FUNCTION : Performs 2-to-1 interpolated scaling. |
- * |
- * SPECIAL NOTES : None. |
- * |
- ****************************************************************************/ |
-static |
-void scale1d_2t1_i |
-( |
- const unsigned char *source, |
- int source_step, |
- unsigned int source_scale, |
- unsigned int source_length, |
- unsigned char *dest, |
- int dest_step, |
- unsigned int dest_scale, |
- unsigned int dest_length |
-) { |
- unsigned int i, j; |
- unsigned int temp; |
- int source_pitch = source_step; |
- (void) source_length; |
- (void) source_scale; |
- (void) dest_scale; |
- |
- source_step *= 2; |
- dest[0] = source[0]; |
- |
- for (i = dest_step, j = source_step; i < dest_length * dest_step; i += dest_step, j += source_step) { |
- temp = 8; |
- temp += 3 * source[j - source_pitch]; |
- temp += 10 * source[j]; |
- temp += 3 * source[j + source_pitch]; |
- temp >>= 4; |
- dest[i] = (char)(temp); |
- } |
-} |
- |
-/**************************************************************************** |
- * |
- * ROUTINE : scale1d_2t1_ps |
- * |
- * INPUTS : const unsigned char *source : Pointer to data to be scaled. |
- * int source_step : Number of pixels to step on in source. |
- * unsigned int source_scale : Scale for source (UNUSED). |
- * unsigned int source_length : Length of source (UNUSED). |
- * unsigned char *dest : Pointer to output data array. |
- * int dest_step : Number of pixels to step on in destination. |
- * unsigned int dest_scale : Scale for destination (UNUSED). |
- * unsigned int dest_length : Length of destination. |
- * |
- * OUTPUTS : None. |
- * |
- * RETURNS : void |
- * |
- * FUNCTION : Performs 2-to-1 point subsampled scaling. |
- * |
- * SPECIAL NOTES : None. |
- * |
- ****************************************************************************/ |
-static |
-void scale1d_2t1_ps |
-( |
- const unsigned char *source, |
- int source_step, |
- unsigned int source_scale, |
- unsigned int source_length, |
- unsigned char *dest, |
- int dest_step, |
- unsigned int dest_scale, |
- unsigned int dest_length |
-) { |
- unsigned int i, j; |
- |
- (void) source_length; |
- (void) source_scale; |
- (void) dest_scale; |
- |
- source_step *= 2; |
- j = 0; |
- |
- for (i = 0; i < dest_length * dest_step; i += dest_step, j += source_step) |
- dest[i] = source[j]; |
-} |
-/**************************************************************************** |
- * |
- * ROUTINE : scale1d_c |
- * |
- * INPUTS : const unsigned char *source : Pointer to data to be scaled. |
- * int source_step : Number of pixels to step on in source. |
- * unsigned int source_scale : Scale for source. |
- * unsigned int source_length : Length of source (UNUSED). |
- * unsigned char *dest : Pointer to output data array. |
- * int dest_step : Number of pixels to step on in destination. |
- * unsigned int dest_scale : Scale for destination. |
- * unsigned int dest_length : Length of destination. |
- * |
- * OUTPUTS : None. |
- * |
- * RETURNS : void |
- * |
- * FUNCTION : Performs linear interpolation in one dimension. |
- * |
- * SPECIAL NOTES : None. |
- * |
- ****************************************************************************/ |
-static |
-void scale1d_c |
-( |
- const unsigned char *source, |
- int source_step, |
- unsigned int source_scale, |
- unsigned int source_length, |
- unsigned char *dest, |
- int dest_step, |
- unsigned int dest_scale, |
- unsigned int dest_length |
-) { |
- unsigned int i; |
- unsigned int round_value = dest_scale / 2; |
- unsigned int left_modifier = dest_scale; |
- unsigned int right_modifier = 0; |
- unsigned char left_pixel = *source; |
- unsigned char right_pixel = *(source + source_step); |
- |
- (void) source_length; |
- |
- /* These asserts are needed if there are boundary issues... */ |
- /*assert ( dest_scale > source_scale );*/ |
- /*assert ( (source_length-1) * dest_scale >= (dest_length-1) * source_scale );*/ |
- |
- for (i = 0; i < dest_length * dest_step; i += dest_step) { |
- dest[i] = (char)((left_modifier * left_pixel + right_modifier * right_pixel + round_value) / dest_scale); |
- |
- right_modifier += source_scale; |
- |
- while (right_modifier > dest_scale) { |
- right_modifier -= dest_scale; |
- source += source_step; |
- left_pixel = *source; |
- right_pixel = *(source + source_step); |
- } |
- |
- left_modifier = dest_scale - right_modifier; |
- } |
-} |
- |
-/**************************************************************************** |
- * |
- * ROUTINE : Scale2D |
- * |
- * INPUTS : const unsigned char *source : Pointer to data to be scaled. |
- * int source_pitch : Stride of source image. |
- * unsigned int source_width : Width of input image. |
- * unsigned int source_height : Height of input image. |
- * unsigned char *dest : Pointer to output data array. |
- * int dest_pitch : Stride of destination image. |
- * unsigned int dest_width : Width of destination image. |
- * unsigned int dest_height : Height of destination image. |
- * unsigned char *temp_area : Pointer to temp work area. |
- * unsigned char temp_area_height : Height of temp work area. |
- * 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. |
- * |
- * OUTPUTS : None. |
- * |
- * RETURNS : void |
- * |
- * FUNCTION : Performs 2-tap linear interpolation in two dimensions. |
- * |
- * SPECIAL NOTES : Expansion is performed one band at a time to help with |
- * caching. |
- * |
- ****************************************************************************/ |
-static |
-void Scale2D |
-( |
- /*const*/ |
- unsigned char *source, |
- int source_pitch, |
- unsigned int source_width, |
- unsigned int source_height, |
- unsigned char *dest, |
- int dest_pitch, |
- unsigned int dest_width, |
- unsigned int dest_height, |
- unsigned char *temp_area, |
- unsigned char temp_area_height, |
- unsigned int hscale, |
- unsigned int hratio, |
- unsigned int vscale, |
- unsigned int vratio, |
- unsigned int interlaced |
-) { |
- /*unsigned*/ |
- int i, j, k; |
- int bands; |
- int dest_band_height; |
- int source_band_height; |
- |
- typedef void (*Scale1D)(const unsigned char * source, int source_step, unsigned int source_scale, unsigned int source_length, |
- unsigned char * dest, int dest_step, unsigned int dest_scale, unsigned int dest_length); |
- |
- Scale1D Scale1Dv = scale1d_c; |
- Scale1D Scale1Dh = scale1d_c; |
- |
- void (*horiz_line_scale)(const unsigned char *, unsigned int, unsigned char *, unsigned int) = NULL; |
- void (*vert_band_scale)(unsigned char *, unsigned int, unsigned char *, unsigned int, unsigned int) = NULL; |
- |
- int ratio_scalable = 1; |
- int interpolation = 0; |
- |
- unsigned char *source_base; /* = (unsigned char *) ((source_pitch >= 0) ? source : (source + ((source_height-1) * source_pitch))); */ |
- unsigned char *line_src; |
- |
- |
- source_base = (unsigned char *)source; |
- |
- if (source_pitch < 0) { |
- int offset; |
- |
- offset = (source_height - 1); |
- offset *= source_pitch; |
- |
- source_base += offset; |
- } |
- |
- /* find out the ratio for each direction */ |
- switch (hratio * 10 / hscale) { |
- case 8: |
- /* 4-5 Scale in Width direction */ |
- horiz_line_scale = vp8_horizontal_line_5_4_scale; |
- break; |
- case 6: |
- /* 3-5 Scale in Width direction */ |
- horiz_line_scale = vp8_horizontal_line_5_3_scale; |
- break; |
- case 5: |
- /* 1-2 Scale in Width direction */ |
- horiz_line_scale = vp8_horizontal_line_2_1_scale; |
- break; |
- default: |
- /* The ratio is not acceptable now */ |
- /* throw("The ratio is not acceptable for now!"); */ |
- ratio_scalable = 0; |
- break; |
- } |
- |
- switch (vratio * 10 / vscale) { |
- case 8: |
- /* 4-5 Scale in vertical direction */ |
- vert_band_scale = vp8_vertical_band_5_4_scale; |
- source_band_height = 5; |
- dest_band_height = 4; |
- break; |
- case 6: |
- /* 3-5 Scale in vertical direction */ |
- vert_band_scale = vp8_vertical_band_5_3_scale; |
- source_band_height = 5; |
- dest_band_height = 3; |
- break; |
- case 5: |
- /* 1-2 Scale in vertical direction */ |
- |
- if (interlaced) { |
- /* if the content is interlaced, point sampling is used */ |
- vert_band_scale = vp8_vertical_band_2_1_scale; |
- } else { |
- |
- interpolation = 1; |
- /* if the content is progressive, interplo */ |
- vert_band_scale = vp8_vertical_band_2_1_scale_i; |
- |
- } |
- |
- source_band_height = 2; |
- dest_band_height = 1; |
- break; |
- default: |
- /* The ratio is not acceptable now */ |
- /* throw("The ratio is not acceptable for now!"); */ |
- ratio_scalable = 0; |
- break; |
- } |
- |
- if (ratio_scalable) { |
- if (source_height == dest_height) { |
- /* for each band of the image */ |
- for (k = 0; k < (int)dest_height; k++) { |
- horiz_line_scale(source, source_width, dest, dest_width); |
- source += source_pitch; |
- dest += dest_pitch; |
- } |
- |
- return; |
- } |
- |
- if (interpolation) { |
- if (source < source_base) |
- source = source_base; |
- |
- horiz_line_scale(source, source_width, temp_area, dest_width); |
- } |
- |
- for (k = 0; k < (int)(dest_height + dest_band_height - 1) / dest_band_height; k++) { |
- /* scale one band horizontally */ |
- for (i = 0; i < source_band_height; i++) { |
- /* Trap case where we could read off the base of the source buffer */ |
- |
- line_src = (unsigned char *)source + i * source_pitch; |
- |
- if (line_src < source_base) |
- line_src = source_base; |
- |
- horiz_line_scale(line_src, source_width, |
- temp_area + (i + 1)*dest_pitch, dest_width); |
- } |
- |
- /* Vertical scaling is in place */ |
- vert_band_scale(temp_area + dest_pitch, dest_pitch, dest, dest_pitch, dest_width); |
- |
- if (interpolation) |
- vpx_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_width); |
- |
- /* Next band... */ |
- source += (unsigned long) source_band_height * source_pitch; |
- dest += (unsigned long) dest_band_height * dest_pitch; |
- } |
- |
- return; |
- } |
- |
- if (hscale == 2 && hratio == 1) |
- Scale1Dh = scale1d_2t1_ps; |
- |
- if (vscale == 2 && vratio == 1) { |
- if (interlaced) |
- Scale1Dv = scale1d_2t1_ps; |
- else |
- Scale1Dv = scale1d_2t1_i; |
- } |
- |
- if (source_height == dest_height) { |
- /* for each band of the image */ |
- for (k = 0; k < (int)dest_height; k++) { |
- Scale1Dh(source, 1, hscale, source_width + 1, dest, 1, hratio, dest_width); |
- source += source_pitch; |
- dest += dest_pitch; |
- } |
- |
- return; |
- } |
- |
- if (dest_height > source_height) { |
- dest_band_height = temp_area_height - 1; |
- source_band_height = dest_band_height * source_height / dest_height; |
- } else { |
- source_band_height = temp_area_height - 1; |
- dest_band_height = source_band_height * vratio / vscale; |
- } |
- |
- /* first row needs to be done so that we can stay one row ahead for vertical zoom */ |
- Scale1Dh(source, 1, hscale, source_width + 1, temp_area, 1, hratio, dest_width); |
- |
- /* for each band of the image */ |
- bands = (dest_height + dest_band_height - 1) / dest_band_height; |
- |
- for (k = 0; k < bands; k++) { |
- /* scale one band horizontally */ |
- for (i = 1; i < source_band_height + 1; i++) { |
- if (k * source_band_height + i < (int) source_height) { |
- Scale1Dh(source + i * source_pitch, 1, hscale, source_width + 1, |
- temp_area + i * dest_pitch, 1, hratio, dest_width); |
- } else { /* Duplicate the last row */ |
- /* copy temp_area row 0 over from last row in the past */ |
- duck_memcpy(temp_area + i * dest_pitch, temp_area + (i - 1)*dest_pitch, dest_pitch); |
- } |
- } |
- |
- /* scale one band vertically */ |
- for (j = 0; j < (int)dest_width; j++) { |
- Scale1Dv(&temp_area[j], dest_pitch, vscale, source_band_height + 1, |
- &dest[j], dest_pitch, vratio, dest_band_height); |
- } |
- |
- /* copy temp_area row 0 over from last row in the past */ |
- duck_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_pitch); |
- |
- /* move to the next band */ |
- source += source_band_height * source_pitch; |
- dest += dest_band_height * dest_pitch; |
- } |
-} |
- |
-/**************************************************************************** |
- * |
- * ROUTINE : |
- * |
- * INPUTS : YV12_BUFFER_CONFIG *src : Pointer to frame to be scaled. |
- * YV12_BUFFER_CONFIG *dst : Pointer to buffer to hold scaled frame. |
- * unsigned char *temp_area : Pointer to temp work area. |
- * unsigned char temp_area_height : Height of temp work area. |
- * 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. |
- * |
- * OUTPUTS : None. |
- * |
- * RETURNS : void |
- * |
- * FUNCTION : Performs 2-tap linear interpolation in two dimensions. |
- * |
- * SPECIAL NOTES : Expansion is performed one band at a time to help with |
- * caching. |
- * |
- ****************************************************************************/ |
-void vp8_scale_frame |
-( |
- YV12_BUFFER_CONFIG *src, |
- YV12_BUFFER_CONFIG *dst, |
- unsigned char *temp_area, |
- unsigned char temp_height, |
- unsigned int hscale, |
- unsigned int hratio, |
- unsigned int vscale, |
- 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); |
-} |