libvpx: Add VP9 decoder.

source/libvpx/vpx_scale/generic/gen_scalers.c

Index: source/libvpx/vpx_scale/generic/gen_scalers.c
===================================================================
--- source/libvpx/vpx_scale/generic/gen_scalers.c	(revision 172621)
+++ source/libvpx/vpx_scale/generic/gen_scalers.c	(working copy)
@@ -17,7 +17,6 @@
 
 /****************************************************************************
  *
- *  ROUTINE       : vp8_horizontal_line_4_5_scale_c
  *
  *  INPUTS        : const unsigned char *source : Pointer to source data.
  *                  unsigned int source_width    : Stride of source.
@@ -34,687 +33,6 @@
  *  SPECIAL NOTES : None.
  *
  ****************************************************************************/
-void vp8_horizontal_line_4_5_scale_c(const unsigned char *source,
-                                     unsigned int source_width,
-                                     unsigned char *dest,
-                                     unsigned int dest_width) {
-  unsigned i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-  const unsigned char *src = source;
-
-  (void) dest_width;
-
-  for (i = 0; i < source_width - 4; i += 4) {
-    a = src[0];
-    b = src[1];
-    des [0] = (unsigned char) a;
-    des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
-    c = src[2] * 154;
-    a = src[3];
-    des [2] = (unsigned char)((b * 102 + c + 128) >> 8);
-    des [3] = (unsigned char)((c + 102 * a + 128) >> 8);
-    b = src[4];
-    des [4] = (unsigned char)((a * 205 + 51 * b + 128) >> 8);
-
-    src += 4;
-    des += 5;
-  }
-
-  a = src[0];
-  b = src[1];
-  des [0] = (unsigned char)(a);
-  des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
-  c = src[2] * 154;
-  a = src[3];
-  des [2] = (unsigned char)((b * 102 + c + 128) >> 8);
-  des [3] = (unsigned char)((c + 102 * a + 128) >> 8);
-  des [4] = (unsigned char)(a);
-
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_vertical_band_4_5_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales vertical band of pixels by scale 4 to 5. The
- *                  height of the band scaled is 4-pixels.
- *
- *  SPECIAL NOTES : The routine uses the first line of the band below
- *                  the current band.
- *
- ****************************************************************************/
-void vp8_vertical_band_4_5_scale_c(unsigned char *dest,
-                                   unsigned int dest_pitch,
-                                   unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c, d;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; i++) {
-    a = des [0];
-    b = des [dest_pitch];
-
-    des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
-
-    c = des[dest_pitch * 2] * 154;
-    d = des[dest_pitch * 3];
-
-    des [dest_pitch * 2] = (unsigned char)((b * 102 + c + 128) >> 8);
-    des [dest_pitch * 3] = (unsigned char)((c + 102 * d + 128) >> 8);
-
-    /* First line in next band */
-    a = des [dest_pitch * 5];
-    des [dest_pitch * 4] = (unsigned char)((d * 205 + 51 * a + 128) >> 8);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_last_vertical_band_4_5_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales last vertical band of pixels by scale 4 to 5. The
- *                  height of the band scaled is 4-pixels.
- *
- *  SPECIAL NOTES : The routine does not have available the first line of
- *                  the band below the current band, since this is the
- *                  last band.
- *
- ****************************************************************************/
-void vp8_last_vertical_band_4_5_scale_c(unsigned char *dest,
-                                        unsigned int dest_pitch,
-                                        unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c, d;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; ++i) {
-    a = des[0];
-    b = des[dest_pitch];
-
-    des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
-
-    c = des[dest_pitch * 2] * 154;
-    d = des[dest_pitch * 3];
-
-    des [dest_pitch * 2] = (unsigned char)((b * 102 + c + 128) >> 8);
-    des [dest_pitch * 3] = (unsigned char)((c + 102 * d + 128) >> 8);
-
-    /* No other line for interplation of this line, so .. */
-    des[dest_pitch * 4] = (unsigned char) d;
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_horizontal_line_2_3_scale_c
- *
- *  INPUTS        : const unsigned char *source : Pointer to source data.
- *                  unsigned int source_width    : Stride of source.
- *                  unsigned char *dest         : Pointer to destination data.
- *                  unsigned int dest_width      : Stride of destination (NOT USED).
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Copies horizontal line of pixels from source to
- *                  destination scaling up by 2 to 3.
- *
- *  SPECIAL NOTES : None.
- *
- *
- ****************************************************************************/
-void vp8_horizontal_line_2_3_scale_c(const unsigned char *source,
-                                     unsigned int source_width,
-                                     unsigned char *dest,
-                                     unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-  const unsigned char *src = source;
-
-  (void) dest_width;
-
-  for (i = 0; i < source_width - 2; i += 2) {
-    a = src[0];
-    b = src[1];
-    c = src[2];
-
-    des [0] = (unsigned char)(a);
-    des [1] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
-    des [2] = (unsigned char)((b * 171 + 85 * c + 128) >> 8);
-
-    src += 2;
-    des += 3;
-  }
-
-  a = src[0];
-  b = src[1];
-  des [0] = (unsigned char)(a);
-  des [1] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
-  des [2] = (unsigned char)(b);
-}
-
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_vertical_band_2_3_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales vertical band of pixels by scale 2 to 3. The
- *                  height of the band scaled is 2-pixels.
- *
- *  SPECIAL NOTES : The routine uses the first line of the band below
- *                  the current band.
- *
- ****************************************************************************/
-void vp8_vertical_band_2_3_scale_c(unsigned char *dest,
-                                   unsigned int dest_pitch,
-                                   unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; i++) {
-    a = des [0];
-    b = des [dest_pitch];
-    c = des[dest_pitch * 3];
-    des [dest_pitch  ] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
-    des [dest_pitch * 2] = (unsigned char)((b * 171 + 85 * c + 128) >> 8);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_last_vertical_band_2_3_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales last vertical band of pixels by scale 2 to 3. The
- *                  height of the band scaled is 2-pixels.
- *
- *  SPECIAL NOTES : The routine does not have available the first line of
- *                  the band below the current band, since this is the
- *                  last band.
- *
- ****************************************************************************/
-void vp8_last_vertical_band_2_3_scale_c(unsigned char *dest,
-                                        unsigned int dest_pitch,
-                                        unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; ++i) {
-    a = des [0];
-    b = des [dest_pitch];
-
-    des [dest_pitch  ] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
-    des [dest_pitch * 2] = (unsigned char)(b);
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_horizontal_line_3_5_scale_c
- *
- *  INPUTS        : const unsigned char *source : Pointer to source data.
- *                  unsigned int source_width    : Stride of source.
- *                  unsigned char *dest         : Pointer to destination data.
- *                  unsigned int dest_width      : Stride of destination (NOT USED).
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Copies horizontal line of pixels from source to
- *                  destination scaling up by 3 to 5.
- *
- *  SPECIAL NOTES : None.
- *
- *
- ****************************************************************************/
-void vp8_horizontal_line_3_5_scale_c(const unsigned char *source,
-                                     unsigned int source_width,
-                                     unsigned char *dest,
-                                     unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-  const unsigned char *src = source;
-
-  (void) dest_width;
-
-  for (i = 0; i < source_width - 3; i += 3) {
-    a = src[0];
-    b = src[1];
-    des [0] = (unsigned char)(a);
-    des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
-
-    c = src[2];
-    des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
-    des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
-
-    a = src[3];
-    des [4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8);
-
-    src += 3;
-    des += 5;
-  }
-
-  a = src[0];
-  b = src[1];
-  des [0] = (unsigned char)(a);
-
-  des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
-  c = src[2];
-  des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
-  des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
-
-  des [4] = (unsigned char)(c);
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_vertical_band_3_5_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales vertical band of pixels by scale 3 to 5. The
- *                  height of the band scaled is 3-pixels.
- *
- *  SPECIAL NOTES : The routine uses the first line of the band below
- *                  the current band.
- *
- ****************************************************************************/
-void vp8_vertical_band_3_5_scale_c(unsigned char *dest,
-                                   unsigned int dest_pitch,
-                                   unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; i++) {
-    a = des [0];
-    b = des [dest_pitch];
-    des [dest_pitch] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
-
-    c = des[dest_pitch * 2];
-    des [dest_pitch * 2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
-    des [dest_pitch * 3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
-
-    /* First line in next band... */
-    a = des [dest_pitch * 5];
-    des [dest_pitch * 4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_last_vertical_band_3_5_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales last vertical band of pixels by scale 3 to 5. The
- *                  height of the band scaled is 3-pixels.
- *
- *  SPECIAL NOTES : The routine does not have available the first line of
- *                  the band below the current band, since this is the
- *                  last band.
- *
- ****************************************************************************/
-void vp8_last_vertical_band_3_5_scale_c(unsigned char *dest,
-                                        unsigned int dest_pitch,
-                                        unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; ++i) {
-    a = des [0];
-    b = des [dest_pitch];
-
-    des [ dest_pitch ] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
-
-    c = des[dest_pitch * 2];
-    des [dest_pitch * 2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
-    des [dest_pitch * 3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
-
-    /* No other line for interplation of this line, so .. */
-    des [ dest_pitch * 4 ] = (unsigned char)(c);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_horizontal_line_3_4_scale_c
- *
- *  INPUTS        : const unsigned char *source : Pointer to source data.
- *                  unsigned int source_width    : Stride of source.
- *                  unsigned char *dest         : Pointer to destination data.
- *                  unsigned int dest_width      : Stride of destination (NOT USED).
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Copies horizontal line of pixels from source to
- *                  destination scaling up by 3 to 4.
- *
- *  SPECIAL NOTES : None.
- *
- *
- ****************************************************************************/
-void vp8_horizontal_line_3_4_scale_c(const unsigned char *source,
-                                     unsigned int source_width,
-                                     unsigned char *dest,
-                                     unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-  const unsigned char *src = source;
-
-  (void) dest_width;
-
-  for (i = 0; i < source_width - 3; i += 3) {
-    a = src[0];
-    b = src[1];
-    des [0] = (unsigned char)(a);
-    des [1] = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
-
-    c = src[2];
-    des [2] = (unsigned char)((b + c + 1) >> 1);
-
-    a = src[3];
-    des [3] = (unsigned char)((c * 192 + a * 64 + 128) >> 8);
-
-    src += 3;
-    des += 4;
-  }
-
-  a = src[0];
-  b = src[1];
-  des [0] = (unsigned char)(a);
-  des [1] = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
-
-  c = src[2];
-  des [2] = (unsigned char)((b + c + 1) >> 1);
-  des [3] = (unsigned char)(c);
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_vertical_band_3_4_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales vertical band of pixels by scale 3 to 4. The
- *                  height of the band scaled is 3-pixels.
- *
- *  SPECIAL NOTES : The routine uses the first line of the band below
- *                  the current band.
- *
- ****************************************************************************/
-void vp8_vertical_band_3_4_scale_c(unsigned char *dest,
-                                   unsigned int dest_pitch,
-                                   unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; i++) {
-    a = des [0];
-    b = des [dest_pitch];
-    des [dest_pitch]   = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
-
-    c = des[dest_pitch * 2];
-    des [dest_pitch * 2] = (unsigned char)((b + c + 1) >> 1);
-
-    /* First line in next band... */
-    a = des [dest_pitch * 4];
-    des [dest_pitch * 3] = (unsigned char)((c * 192 + a * 64 + 128) >> 8);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_last_vertical_band_3_4_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales last vertical band of pixels by scale 3 to 4. The
- *                  height of the band scaled is 3-pixels.
- *
- *  SPECIAL NOTES : The routine does not have available the first line of
- *                  the band below the current band, since this is the
- *                  last band.
- *
- ****************************************************************************/
-void vp8_last_vertical_band_3_4_scale_c(unsigned char *dest,
-                                        unsigned int dest_pitch,
-                                        unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b, c;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; ++i) {
-    a = des [0];
-    b = des [dest_pitch];
-
-    des [dest_pitch]   = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
-
-    c = des[dest_pitch * 2];
-    des [dest_pitch * 2] = (unsigned char)((b + c + 1) >> 1);
-
-    /* No other line for interplation of this line, so .. */
-    des [dest_pitch * 3] = (unsigned char)(c);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_horizontal_line_1_2_scale_c
- *
- *  INPUTS        : const unsigned char *source : Pointer to source data.
- *                  unsigned int source_width    : Stride of source.
- *                  unsigned char *dest         : Pointer to destination data.
- *                  unsigned int dest_width      : Stride of destination (NOT USED).
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Copies horizontal line of pixels from source to
- *                  destination scaling up by 1 to 2.
- *
- *  SPECIAL NOTES : None.
- *
- ****************************************************************************/
-void vp8_horizontal_line_1_2_scale_c(const unsigned char *source,
-                                     unsigned int source_width,
-                                     unsigned char *dest,
-                                     unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b;
-  unsigned char *des = dest;
-  const unsigned char *src = source;
-
-  (void) dest_width;
-
-  for (i = 0; i < source_width - 1; i += 1) {
-    a = src[0];
-    b = src[1];
-    des [0] = (unsigned char)(a);
-    des [1] = (unsigned char)((a + b + 1) >> 1);
-    src += 1;
-    des += 2;
-  }
-
-  a = src[0];
-  des [0] = (unsigned char)(a);
-  des [1] = (unsigned char)(a);
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_vertical_band_1_2_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales vertical band of pixels by scale 1 to 2. The
- *                  height of the band scaled is 1-pixel.
- *
- *  SPECIAL NOTES : The routine uses the first line of the band below
- *                  the current band.
- *
- ****************************************************************************/
-void vp8_vertical_band_1_2_scale_c(unsigned char *dest,
-                                   unsigned int dest_pitch,
-                                   unsigned int dest_width) {
-  unsigned int i;
-  unsigned int a, b;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; i++) {
-    a = des [0];
-    b = des [dest_pitch * 2];
-
-    des[dest_pitch] = (unsigned char)((a + b + 1) >> 1);
-
-    des++;
-  }
-}
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_last_vertical_band_1_2_scale_c
- *
- *  INPUTS        : unsigned char *dest    : Pointer to destination data.
- *                  unsigned int dest_pitch : Stride of destination data.
- *                  unsigned int dest_width : Width of destination data.
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Scales last vertical band of pixels by scale 1 to 2. The
- *                  height of the band scaled is 1-pixel.
- *
- *  SPECIAL NOTES : The routine does not have available the first line of
- *                  the band below the current band, since this is the
- *                  last band.
- *
- ****************************************************************************/
-void vp8_last_vertical_band_1_2_scale_c(unsigned char *dest,
-                                        unsigned int dest_pitch,
-                                        unsigned int dest_width) {
-  unsigned int i;
-  unsigned char *des = dest;
-
-  for (i = 0; i < dest_width; ++i) {
-    des[dest_pitch] = des[0];
-    des++;
-  }
-}
-
-
-
-
-
-/****************************************************************************
- *
- *  ROUTINE       : vp8_horizontal_line_4_5_scale_c
- *
- *  INPUTS        : const unsigned char *source : Pointer to source data.
- *                  unsigned int source_width    : Stride of source.
- *                  unsigned char *dest         : Pointer to destination data.
- *                  unsigned int dest_width      : Stride of destination (NOT USED).
- *
- *  OUTPUTS       : None.
- *
- *  RETURNS       : void
- *
- *  FUNCTION      : Copies horizontal line of pixels from source to
- *                  destination scaling up by 4 to 5.
- *
- *  SPECIAL NOTES : None.
- *
- ****************************************************************************/
 void vp8_horizontal_line_5_4_scale_c(const unsigned char *source,
                                      unsigned int source_width,
                                      unsigned char *dest,