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Diffstat (limited to 'vpx_scale/generic/vpxscale.c')
| -rw-r--r-- | vpx_scale/generic/vpxscale.c | 1088 |
1 files changed, 1088 insertions, 0 deletions
diff --git a/vpx_scale/generic/vpxscale.c b/vpx_scale/generic/vpxscale.c new file mode 100644 index 000000000..206cd5512 --- /dev/null +++ b/vpx_scale/generic/vpxscale.c @@ -0,0 +1,1088 @@ +/* + * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license and patent + * grant that can be found in the LICENSE file in the root of the source + * tree. 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_mem/vpx_mem.h" +#include "vpx_scale/yv12config.h" +#include "vpx_scale/scale_mode.h" + +/**************************************************************************** +* Exports +****************************************************************************/ +#ifndef VPX_NO_GLOBALS +void (*vp8_vertical_band_4_5_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_last_vertical_band_4_5_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_vertical_band_2_3_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_last_vertical_band_2_3_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_vertical_band_3_5_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_last_vertical_band_3_5_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_vertical_band_3_4_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_last_vertical_band_3_4_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_1_2_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_3_5_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_3_4_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_2_3_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_4_5_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_vertical_band_1_2_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_last_vertical_band_1_2_scale)(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; + +void (*vp8_vertical_band_5_4_scale)(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_vertical_band_5_3_scale)(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_vertical_band_2_1_scale)(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_vertical_band_2_1_scale_i)(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_2_1_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_5_3_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +void (*vp8_horizontal_line_5_4_scale)(const unsigned char *source, unsigned int source_width, unsigned char *dest, unsigned int dest_width) = 0; +#else +# include "vpxscale_nofp.h" +#endif + +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 : horizontal_line_copy + * + * INPUTS : None + * + * + * OUTPUTS : None. + * + * RETURNS : None + * + * FUNCTION : 1 to 1 scaling up for a horizontal line of pixles + * + * SPECIAL NOTES : None. + * + * ERRORS : None. + * + ****************************************************************************/ +static +void horizontal_line_copy( + const unsigned char *source, + unsigned int source_width, + unsigned char *dest, + unsigned int dest_width +) +{ + (void) dest_width; + + duck_memcpy(dest, source, source_width); +} +/**************************************************************************** + * + * ROUTINE : null_scale + * + * INPUTS : None + * + * + * OUTPUTS : None. + * + * RETURNS : None + * + * FUNCTION : 1 to 1 scaling up for a vertical band + * + * SPECIAL NOTES : None. + * + * ERRORS : None. + * + ****************************************************************************/ +static +void null_scale( + unsigned char *dest, + unsigned int dest_pitch, + unsigned int dest_width +) +{ + (void) dest; + (void) dest_pitch; + (void) dest_width; + + return; +} + +/**************************************************************************** + * + * 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); +} +/**************************************************************************** + * + * 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; + } +} |