michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: #include "./vpx_config.h"
michael@0: #include "vpx_scale/yv12config.h"
michael@0: #include "vpx_mem/vpx_mem.h"
michael@0: 
michael@0: /****************************************************************************
michael@0: *  Exports
michael@0: ****************************************************************************/
michael@0: 
michael@0: /****************************************************************************
michael@0:  *
michael@0:  ****************************************************************************/
michael@0: int
michael@0: vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
michael@0:   if (ybf) {
michael@0:     vpx_free(ybf->buffer_alloc);
michael@0: 
michael@0:     /* buffer_alloc isn't accessed by most functions.  Rather y_buffer,
michael@0:       u_buffer and v_buffer point to buffer_alloc and are used.  Clear out
michael@0:       all of this so that a freed pointer isn't inadvertently used */
michael@0:     vpx_memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG));
michael@0:   } else {
michael@0:     return -1;
michael@0:   }
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
michael@0:                                   int width, int height, int border) {
michael@0:   if (ybf) {
michael@0:     int aligned_width = (width + 15) & ~15;
michael@0:     int aligned_height = (height + 15) & ~15;
michael@0:     int y_stride = ((aligned_width + 2 * border) + 31) & ~31;
michael@0:     int yplane_size = (aligned_height + 2 * border) * y_stride;
michael@0:     int uv_width = aligned_width >> 1;
michael@0:     int uv_height = aligned_height >> 1;
michael@0:     /** There is currently a bunch of code which assumes
michael@0:       *  uv_stride == y_stride/2, so enforce this here. */
michael@0:     int uv_stride = y_stride >> 1;
michael@0:     int uvplane_size = (uv_height + border) * uv_stride;
michael@0:     const int frame_size = yplane_size + 2 * uvplane_size;
michael@0: 
michael@0:     if (!ybf->buffer_alloc) {
michael@0:       ybf->buffer_alloc = vpx_memalign(32, frame_size);
michael@0:       ybf->buffer_alloc_sz = frame_size;
michael@0:     }
michael@0: 
michael@0:     if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size)
michael@0:       return -1;
michael@0: 
michael@0:     /* Only support allocating buffers that have a border that's a multiple
michael@0:      * of 32. The border restriction is required to get 16-byte alignment of
michael@0:      * the start of the chroma rows without introducing an arbitrary gap
michael@0:      * between planes, which would break the semantics of things like
michael@0:      * vpx_img_set_rect(). */
michael@0:     if (border & 0x1f)
michael@0:       return -3;
michael@0: 
michael@0:     ybf->y_crop_width = width;
michael@0:     ybf->y_crop_height = height;
michael@0:     ybf->y_width  = aligned_width;
michael@0:     ybf->y_height = aligned_height;
michael@0:     ybf->y_stride = y_stride;
michael@0: 
michael@0:     ybf->uv_width = uv_width;
michael@0:     ybf->uv_height = uv_height;
michael@0:     ybf->uv_stride = uv_stride;
michael@0: 
michael@0:     ybf->alpha_width = 0;
michael@0:     ybf->alpha_height = 0;
michael@0:     ybf->alpha_stride = 0;
michael@0: 
michael@0:     ybf->border = border;
michael@0:     ybf->frame_size = frame_size;
michael@0: 
michael@0:     ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border;
michael@0:     ybf->u_buffer = ybf->buffer_alloc + yplane_size + (border / 2  * uv_stride) + border / 2;
michael@0:     ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + (border / 2  * uv_stride) + border / 2;
michael@0:     ybf->alpha_buffer = NULL;
michael@0: 
michael@0:     ybf->corrupted = 0; /* assume not currupted by errors */
michael@0:     return 0;
michael@0:   }
michael@0:   return -2;
michael@0: }
michael@0: 
michael@0: int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
michael@0:                                 int width, int height, int border) {
michael@0:   if (ybf) {
michael@0:     vp8_yv12_de_alloc_frame_buffer(ybf);
michael@0:     return vp8_yv12_realloc_frame_buffer(ybf, width, height, border);
michael@0:   }
michael@0:   return -2;
michael@0: }
michael@0: 
michael@0: #if CONFIG_VP9
michael@0: // TODO(jkoleszar): Maybe replace this with struct vpx_image
michael@0: 
michael@0: int vp9_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
michael@0:   if (ybf) {
michael@0:     vpx_free(ybf->buffer_alloc);
michael@0: 
michael@0:     /* buffer_alloc isn't accessed by most functions.  Rather y_buffer,
michael@0:       u_buffer and v_buffer point to buffer_alloc and are used.  Clear out
michael@0:       all of this so that a freed pointer isn't inadvertently used */
michael@0:     vpx_memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG));
michael@0:   } else {
michael@0:     return -1;
michael@0:   }
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: int vp9_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
michael@0:                              int width, int height,
michael@0:                              int ss_x, int ss_y, int border) {
michael@0:   if (ybf) {
michael@0:     const int aligned_width = (width + 7) & ~7;
michael@0:     const int aligned_height = (height + 7) & ~7;
michael@0:     const int y_stride = ((aligned_width + 2 * border) + 31) & ~31;
michael@0:     const int yplane_size = (aligned_height + 2 * border) * y_stride;
michael@0:     const int uv_width = aligned_width >> ss_x;
michael@0:     const int uv_height = aligned_height >> ss_y;
michael@0:     const int uv_stride = y_stride >> ss_x;
michael@0:     const int uv_border_w = border >> ss_x;
michael@0:     const int uv_border_h = border >> ss_y;
michael@0:     const int uvplane_size = (uv_height + 2 * uv_border_h) * uv_stride;
michael@0: #if CONFIG_ALPHA
michael@0:     const int alpha_width = aligned_width;
michael@0:     const int alpha_height = aligned_height;
michael@0:     const int alpha_stride = y_stride;
michael@0:     const int alpha_border_w = border;
michael@0:     const int alpha_border_h = border;
michael@0:     const int alpha_plane_size = (alpha_height + 2 * alpha_border_h) *
michael@0:                                  alpha_stride;
michael@0:     const int frame_size = yplane_size + 2 * uvplane_size +
michael@0:                            alpha_plane_size;
michael@0: #else
michael@0:     const int frame_size = yplane_size + 2 * uvplane_size;
michael@0: #endif
michael@0:     if (frame_size > ybf->buffer_alloc_sz) {
michael@0:       // Allocation to hold larger frame, or first allocation.
michael@0:       if (ybf->buffer_alloc)
michael@0:         vpx_free(ybf->buffer_alloc);
michael@0:       ybf->buffer_alloc = vpx_memalign(32, frame_size);
michael@0:       ybf->buffer_alloc_sz = frame_size;
michael@0:     }
michael@0: 
michael@0:     if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size)
michael@0:       return -1;
michael@0: 
michael@0:     /* Only support allocating buffers that have a border that's a multiple
michael@0:      * of 32. The border restriction is required to get 16-byte alignment of
michael@0:      * the start of the chroma rows without introducing an arbitrary gap
michael@0:      * between planes, which would break the semantics of things like
michael@0:      * vpx_img_set_rect(). */
michael@0:     if (border & 0x1f)
michael@0:       return -3;
michael@0: 
michael@0:     ybf->y_crop_width = width;
michael@0:     ybf->y_crop_height = height;
michael@0:     ybf->y_width  = aligned_width;
michael@0:     ybf->y_height = aligned_height;
michael@0:     ybf->y_stride = y_stride;
michael@0: 
michael@0:     ybf->uv_crop_width = (width + ss_x) >> ss_x;
michael@0:     ybf->uv_crop_height = (height + ss_y) >> ss_y;
michael@0:     ybf->uv_width = uv_width;
michael@0:     ybf->uv_height = uv_height;
michael@0:     ybf->uv_stride = uv_stride;
michael@0: 
michael@0:     ybf->border = border;
michael@0:     ybf->frame_size = frame_size;
michael@0: 
michael@0:     ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border;
michael@0:     ybf->u_buffer = ybf->buffer_alloc + yplane_size +
michael@0:                     (uv_border_h * uv_stride) + uv_border_w;
michael@0:     ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size +
michael@0:                     (uv_border_h * uv_stride) + uv_border_w;
michael@0: 
michael@0: #if CONFIG_ALPHA
michael@0:     ybf->alpha_width = alpha_width;
michael@0:     ybf->alpha_height = alpha_height;
michael@0:     ybf->alpha_stride = alpha_stride;
michael@0:     ybf->alpha_buffer = ybf->buffer_alloc + yplane_size + 2 * uvplane_size +
michael@0:                         (alpha_border_h * alpha_stride) + alpha_border_w;
michael@0: #endif
michael@0:     ybf->corrupted = 0; /* assume not corrupted by errors */
michael@0:     return 0;
michael@0:   }
michael@0:   return -2;
michael@0: }
michael@0: 
michael@0: int vp9_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
michael@0:                            int width, int height,
michael@0:                            int ss_x, int ss_y, int border) {
michael@0:   if (ybf) {
michael@0:     vp9_free_frame_buffer(ybf);
michael@0:     return vp9_realloc_frame_buffer(ybf, width, height, ss_x, ss_y, border);
michael@0:   }
michael@0:   return -2;
michael@0: }
michael@0: #endif