diff options
Diffstat (limited to 'libvpx/vp9/encoder/vp9_extend.c')
| -rw-r--r-- | libvpx/vp9/encoder/vp9_extend.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/libvpx/vp9/encoder/vp9_extend.c b/libvpx/vp9/encoder/vp9_extend.c new file mode 100644 index 0000000..dcbb5ac --- /dev/null +++ b/libvpx/vp9/encoder/vp9_extend.c @@ -0,0 +1,143 @@ +/* + * 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. + */ + +#include "vpx_mem/vpx_mem.h" + +#include "vp9/common/vp9_common.h" +#include "vp9/encoder/vp9_extend.h" + +static void copy_and_extend_plane(const uint8_t *src, int src_pitch, + uint8_t *dst, int dst_pitch, + int w, int h, + int extend_top, int extend_left, + int extend_bottom, int extend_right) { + int i, linesize; + + // copy the left and right most columns out + const uint8_t *src_ptr1 = src; + const uint8_t *src_ptr2 = src + w - 1; + uint8_t *dst_ptr1 = dst - extend_left; + uint8_t *dst_ptr2 = dst + w; + + for (i = 0; i < h; i++) { + vpx_memset(dst_ptr1, src_ptr1[0], extend_left); + vpx_memcpy(dst_ptr1 + extend_left, src_ptr1, w); + vpx_memset(dst_ptr2, src_ptr2[0], extend_right); + src_ptr1 += src_pitch; + src_ptr2 += src_pitch; + dst_ptr1 += dst_pitch; + dst_ptr2 += dst_pitch; + } + + // Now copy the top and bottom lines into each line of the respective + // borders + src_ptr1 = dst - extend_left; + src_ptr2 = dst + dst_pitch * (h - 1) - extend_left; + dst_ptr1 = dst + dst_pitch * (-extend_top) - extend_left; + dst_ptr2 = dst + dst_pitch * (h) - extend_left; + linesize = extend_left + extend_right + w; + + for (i = 0; i < extend_top; i++) { + vpx_memcpy(dst_ptr1, src_ptr1, linesize); + dst_ptr1 += dst_pitch; + } + + for (i = 0; i < extend_bottom; i++) { + vpx_memcpy(dst_ptr2, src_ptr2, linesize); + dst_ptr2 += dst_pitch; + } +} + +void vp9_copy_and_extend_frame(const YV12_BUFFER_CONFIG *src, + YV12_BUFFER_CONFIG *dst) { + // Extend src frame in buffer + // Altref filtering assumes 16 pixel extension + const int et_y = 16; + const int el_y = 16; + // Motion estimation may use src block variance with the block size up + // to 64x64, so the right and bottom need to be extended to 64 multiple + // or up to 16, whichever is greater. + const int eb_y = MAX(ALIGN_POWER_OF_TWO(src->y_width, 6) - src->y_width, + 16); + const int er_y = MAX(ALIGN_POWER_OF_TWO(src->y_height, 6) - src->y_height, + 16); + const int uv_width_subsampling = (src->uv_width != src->y_width); + const int uv_height_subsampling = (src->uv_height != src->y_height); + const int et_uv = et_y >> uv_height_subsampling; + const int el_uv = el_y >> uv_width_subsampling; + const int eb_uv = eb_y >> uv_height_subsampling; + const int er_uv = er_y >> uv_width_subsampling; + +#if CONFIG_ALPHA + const int et_a = dst->border >> (dst->alpha_height != dst->y_height); + const int el_a = dst->border >> (dst->alpha_width != dst->y_width); + const int eb_a = et_a + dst->alpha_height - src->alpha_height; + const int er_a = el_a + dst->alpha_width - src->alpha_width; + + copy_and_extend_plane(src->alpha_buffer, src->alpha_stride, + dst->alpha_buffer, dst->alpha_stride, + src->alpha_width, src->alpha_height, + et_a, el_a, eb_a, er_a); +#endif + + copy_and_extend_plane(src->y_buffer, src->y_stride, + dst->y_buffer, dst->y_stride, + src->y_width, src->y_height, + et_y, el_y, eb_y, er_y); + + copy_and_extend_plane(src->u_buffer, src->uv_stride, + dst->u_buffer, dst->uv_stride, + src->uv_width, src->uv_height, + et_uv, el_uv, eb_uv, er_uv); + + copy_and_extend_plane(src->v_buffer, src->uv_stride, + dst->v_buffer, dst->uv_stride, + src->uv_width, src->uv_height, + et_uv, el_uv, eb_uv, er_uv); +} + +void vp9_copy_and_extend_frame_with_rect(const YV12_BUFFER_CONFIG *src, + YV12_BUFFER_CONFIG *dst, + int srcy, int srcx, + int srch, int srcw) { + // If the side is not touching the bounder then don't extend. + const int et_y = srcy ? 0 : dst->border; + const int el_y = srcx ? 0 : dst->border; + const int eb_y = srcy + srch != src->y_height ? 0 : + dst->border + dst->y_height - src->y_height; + const int er_y = srcx + srcw != src->y_width ? 0 : + dst->border + dst->y_width - src->y_width; + const int src_y_offset = srcy * src->y_stride + srcx; + const int dst_y_offset = srcy * dst->y_stride + srcx; + + const int et_uv = ROUND_POWER_OF_TWO(et_y, 1); + const int el_uv = ROUND_POWER_OF_TWO(el_y, 1); + const int eb_uv = ROUND_POWER_OF_TWO(eb_y, 1); + const int er_uv = ROUND_POWER_OF_TWO(er_y, 1); + const int src_uv_offset = ((srcy * src->uv_stride) >> 1) + (srcx >> 1); + const int dst_uv_offset = ((srcy * dst->uv_stride) >> 1) + (srcx >> 1); + const int srch_uv = ROUND_POWER_OF_TWO(srch, 1); + const int srcw_uv = ROUND_POWER_OF_TWO(srcw, 1); + + copy_and_extend_plane(src->y_buffer + src_y_offset, src->y_stride, + dst->y_buffer + dst_y_offset, dst->y_stride, + srcw, srch, + et_y, el_y, eb_y, er_y); + + copy_and_extend_plane(src->u_buffer + src_uv_offset, src->uv_stride, + dst->u_buffer + dst_uv_offset, dst->uv_stride, + srcw_uv, srch_uv, + et_uv, el_uv, eb_uv, er_uv); + + copy_and_extend_plane(src->v_buffer + src_uv_offset, src->uv_stride, + dst->v_buffer + dst_uv_offset, dst->uv_stride, + srcw_uv, srch_uv, + et_uv, el_uv, eb_uv, er_uv); +} |