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