| /* |
| * 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_config.h" |
| #include "vpx_scale/yv12config.h" |
| #include "vpx_mem/vpx_mem.h" |
| |
| /**************************************************************************** |
| * Exports |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * |
| ****************************************************************************/ |
| int |
| vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf) { |
| if (ybf) { |
| vpx_free(ybf->buffer_alloc); |
| |
| /* buffer_alloc isn't accessed by most functions. Rather y_buffer, |
| u_buffer and v_buffer point to buffer_alloc and are used. Clear out |
| all of this so that a freed pointer isn't inadvertently used */ |
| vpx_memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); |
| } else { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, |
| int width, int height, int border) { |
| if (ybf) { |
| int aligned_width = (width + 15) & ~15; |
| int aligned_height = (height + 15) & ~15; |
| int y_stride = ((aligned_width + 2 * border) + 31) & ~31; |
| int yplane_size = (aligned_height + 2 * border) * y_stride; |
| int uv_width = aligned_width >> 1; |
| int uv_height = aligned_height >> 1; |
| /** There is currently a bunch of code which assumes |
| * uv_stride == y_stride/2, so enforce this here. */ |
| int uv_stride = y_stride >> 1; |
| int uvplane_size = (uv_height + border) * uv_stride; |
| const int frame_size = yplane_size + 2 * uvplane_size; |
| |
| if (!ybf->buffer_alloc) { |
| ybf->buffer_alloc = vpx_memalign(32, frame_size); |
| ybf->buffer_alloc_sz = frame_size; |
| } |
| |
| if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) |
| return -1; |
| |
| /* Only support allocating buffers that have a border that's a multiple |
| * of 32. The border restriction is required to get 16-byte alignment of |
| * the start of the chroma rows without introducing an arbitrary gap |
| * between planes, which would break the semantics of things like |
| * vpx_img_set_rect(). */ |
| if (border & 0x1f) |
| return -3; |
| |
| ybf->y_crop_width = width; |
| ybf->y_crop_height = height; |
| ybf->y_width = aligned_width; |
| ybf->y_height = aligned_height; |
| ybf->y_stride = y_stride; |
| |
| ybf->uv_width = uv_width; |
| ybf->uv_height = uv_height; |
| ybf->uv_stride = uv_stride; |
| |
| ybf->alpha_width = 0; |
| ybf->alpha_height = 0; |
| ybf->alpha_stride = 0; |
| |
| ybf->border = border; |
| ybf->frame_size = frame_size; |
| |
| ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border; |
| ybf->u_buffer = ybf->buffer_alloc + yplane_size + (border / 2 * uv_stride) + border / 2; |
| ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + (border / 2 * uv_stride) + border / 2; |
| ybf->alpha_buffer = NULL; |
| |
| ybf->corrupted = 0; /* assume not currupted by errors */ |
| return 0; |
| } |
| return -2; |
| } |
| |
| int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, |
| int width, int height, int border) { |
| if (ybf) { |
| vp8_yv12_de_alloc_frame_buffer(ybf); |
| return vp8_yv12_realloc_frame_buffer(ybf, width, height, border); |
| } |
| return -2; |
| } |
| |
| #if CONFIG_VP9 |
| // TODO(jkoleszar): Maybe replace this with struct vpx_image |
| |
| int vp9_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) { |
| if (ybf) { |
| vpx_free(ybf->buffer_alloc); |
| |
| /* buffer_alloc isn't accessed by most functions. Rather y_buffer, |
| u_buffer and v_buffer point to buffer_alloc and are used. Clear out |
| all of this so that a freed pointer isn't inadvertently used */ |
| vpx_memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); |
| } else { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int vp9_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, |
| int width, int height, |
| int ss_x, int ss_y, int border) { |
| if (ybf) { |
| const int aligned_width = (width + 7) & ~7; |
| const int aligned_height = (height + 7) & ~7; |
| const int y_stride = ((aligned_width + 2 * border) + 31) & ~31; |
| const int yplane_size = (aligned_height + 2 * border) * y_stride; |
| const int uv_width = aligned_width >> ss_x; |
| const int uv_height = aligned_height >> ss_y; |
| const int uv_stride = y_stride >> ss_x; |
| const int uv_border_w = border >> ss_x; |
| const int uv_border_h = border >> ss_y; |
| const int uvplane_size = (uv_height + 2 * uv_border_h) * uv_stride; |
| #if CONFIG_ALPHA |
| const int alpha_width = aligned_width; |
| const int alpha_height = aligned_height; |
| const int alpha_stride = y_stride; |
| const int alpha_border_w = border; |
| const int alpha_border_h = border; |
| const int alpha_plane_size = (alpha_height + 2 * alpha_border_h) * |
| alpha_stride; |
| const int frame_size = yplane_size + 2 * uvplane_size + |
| alpha_plane_size; |
| #else |
| const int frame_size = yplane_size + 2 * uvplane_size; |
| #endif |
| if (!ybf->buffer_alloc) { |
| ybf->buffer_alloc = vpx_memalign(32, frame_size); |
| ybf->buffer_alloc_sz = frame_size; |
| } |
| |
| if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) |
| return -1; |
| |
| /* Only support allocating buffers that have a border that's a multiple |
| * of 32. The border restriction is required to get 16-byte alignment of |
| * the start of the chroma rows without introducing an arbitrary gap |
| * between planes, which would break the semantics of things like |
| * vpx_img_set_rect(). */ |
| if (border & 0x1f) |
| return -3; |
| |
| ybf->y_crop_width = width; |
| ybf->y_crop_height = height; |
| ybf->y_width = aligned_width; |
| ybf->y_height = aligned_height; |
| ybf->y_stride = y_stride; |
| |
| ybf->uv_crop_width = (width + ss_x) >> ss_x; |
| ybf->uv_crop_height = (height + ss_y) >> ss_y; |
| ybf->uv_width = uv_width; |
| ybf->uv_height = uv_height; |
| ybf->uv_stride = uv_stride; |
| |
| ybf->border = border; |
| ybf->frame_size = frame_size; |
| |
| ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border; |
| ybf->u_buffer = ybf->buffer_alloc + yplane_size + |
| (uv_border_h * uv_stride) + uv_border_w; |
| ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + |
| (uv_border_h * uv_stride) + uv_border_w; |
| |
| #if CONFIG_ALPHA |
| ybf->alpha_width = alpha_width; |
| ybf->alpha_height = alpha_height; |
| ybf->alpha_stride = alpha_stride; |
| ybf->alpha_buffer = ybf->buffer_alloc + yplane_size + 2 * uvplane_size + |
| (alpha_border_h * alpha_stride) + alpha_border_w; |
| #endif |
| ybf->corrupted = 0; /* assume not currupted by errors */ |
| return 0; |
| } |
| return -2; |
| } |
| |
| int vp9_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, |
| int width, int height, |
| int ss_x, int ss_y, int border) { |
| if (ybf) { |
| vp9_free_frame_buffer(ybf); |
| return vp9_realloc_frame_buffer(ybf, width, height, ss_x, ss_y, border); |
| } |
| return -2; |
| } |
| #endif |
