libvpx: Add VP9 decoder.

source/libvpx/vpx_scale/generic/vpxscale.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 
 /****************************************************************************
  *
  *   Module Title :     scale.c
  *
  *   Description  :     Image scaling functions.
  *
  ***************************************************************************/
 
 /****************************************************************************
 *  Header Files
 ****************************************************************************/
-#include "./vpx_rtcd.h"
+#include "./vpx_scale_rtcd.h"
 #include "vpx_mem/vpx_mem.h"
 #include "vpx_scale/yv12config.h"
-#include "vpx_scale/scale_mode.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       :     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.
@@ skipping 468 matching lines @@
           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;
-  }
-}