ref: 6a7c84a2449dcc70de2525df209afea908622399
dir: /vpx_scale/generic/yv12config.c/
/* * 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 <assert.h> #include <limits.h> #include "vpx_scale/yv12config.h" #include "vpx_mem/vpx_mem.h" #include "vpx_ports/mem.h" #if defined(VPX_MAX_ALLOCABLE_MEMORY) #include "vp9/common/vp9_onyxc_int.h" #endif // VPX_MAX_ALLOCABLE_MEMORY /**************************************************************************** * Exports ****************************************************************************/ /**************************************************************************** * ****************************************************************************/ #define yv12_align_addr(addr, align) \ (void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align)) int vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf) { if (ybf) { // If libvpx is using frame buffer callbacks then buffer_alloc_sz must // not be set. if (ybf->buffer_alloc_sz > 0) { 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 */ 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 size_t frame_size = yplane_size + 2 * uvplane_size; if (!ybf->buffer_alloc) { ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, frame_size); #if defined(__has_feature) #if __has_feature(memory_sanitizer) // This memset is needed for fixing the issue of using uninitialized // value in msan test. It will cause a perf loss, so only do this for // msan test. memset(ybf->buffer_alloc, 0, frame_size); #endif #endif 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 + 1) / 2; ybf->uv_crop_height = (height + 1) / 2; 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 vpx_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) { if (ybf) { if (ybf->buffer_alloc_sz > 0) { 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 */ memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); } else { return -1; } return 0; } int vpx_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, int ss_x, int ss_y, #if CONFIG_VP9_HIGHBITDEPTH int use_highbitdepth, #endif int border, int byte_alignment, vpx_codec_frame_buffer_t *fb, vpx_get_frame_buffer_cb_fn_t cb, void *cb_priv) { #if CONFIG_SIZE_LIMIT if (width > DECODE_WIDTH_LIMIT || height > DECODE_HEIGHT_LIMIT) return -1; #endif /* 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; if (ybf) { const int vp9_byte_align = (byte_alignment == 0) ? 1 : byte_alignment; 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 uint64_t yplane_size = (aligned_height + 2 * border) * (uint64_t)y_stride + byte_alignment; 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 uint64_t uvplane_size = (uv_height + 2 * uv_border_h) * (uint64_t)uv_stride + byte_alignment; #if CONFIG_VP9_HIGHBITDEPTH const uint64_t frame_size = (1 + use_highbitdepth) * (yplane_size + 2 * uvplane_size); #else const uint64_t frame_size = yplane_size + 2 * uvplane_size; #endif // CONFIG_VP9_HIGHBITDEPTH uint8_t *buf = NULL; #if defined(VPX_MAX_ALLOCABLE_MEMORY) // The decoder may allocate REF_FRAMES frame buffers in the frame buffer // pool. Bound the total amount of allocated memory as if these REF_FRAMES // frame buffers were allocated in a single allocation. if (frame_size > VPX_MAX_ALLOCABLE_MEMORY / REF_FRAMES) return -1; #endif // VPX_MAX_ALLOCABLE_MEMORY // frame_size is stored in buffer_alloc_sz, which is a size_t. If it won't // fit, fail early. if (frame_size > SIZE_MAX) { return -1; } if (cb != NULL) { const int align_addr_extra_size = 31; const uint64_t external_frame_size = frame_size + align_addr_extra_size; assert(fb != NULL); if (external_frame_size != (size_t)external_frame_size) return -1; // Allocation to hold larger frame, or first allocation. if (cb(cb_priv, (size_t)external_frame_size, fb) < 0) return -1; if (fb->data == NULL || fb->size < external_frame_size) return -1; ybf->buffer_alloc = (uint8_t *)yv12_align_addr(fb->data, 32); #if defined(__has_feature) #if __has_feature(memory_sanitizer) // This memset is needed for fixing the issue of using uninitialized // value in msan test. It will cause a perf loss, so only do this for // msan test. memset(ybf->buffer_alloc, 0, (size_t)frame_size); #endif #endif } else if (frame_size > ybf->buffer_alloc_sz) { // Allocation to hold larger frame, or first allocation. vpx_free(ybf->buffer_alloc); ybf->buffer_alloc = NULL; ybf->buffer_alloc_sz = 0; ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, (size_t)frame_size); if (!ybf->buffer_alloc) return -1; ybf->buffer_alloc_sz = (size_t)frame_size; // This memset is needed for fixing valgrind error from C loop filter // due to access uninitialized memory in frame border. It could be // removed if border is totally removed. memset(ybf->buffer_alloc, 0, ybf->buffer_alloc_sz); } 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 = (size_t)frame_size; ybf->subsampling_x = ss_x; ybf->subsampling_y = ss_y; buf = ybf->buffer_alloc; #if CONFIG_VP9_HIGHBITDEPTH if (use_highbitdepth) { // Store uint16 addresses when using 16bit framebuffers buf = CONVERT_TO_BYTEPTR(ybf->buffer_alloc); ybf->flags = YV12_FLAG_HIGHBITDEPTH; } else { ybf->flags = 0; } #endif // CONFIG_VP9_HIGHBITDEPTH ybf->y_buffer = (uint8_t *)yv12_align_addr( buf + (border * y_stride) + border, vp9_byte_align); ybf->u_buffer = (uint8_t *)yv12_align_addr( buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w, vp9_byte_align); ybf->v_buffer = (uint8_t *)yv12_align_addr(buf + yplane_size + uvplane_size + (uv_border_h * uv_stride) + uv_border_w, vp9_byte_align); ybf->corrupted = 0; /* assume not corrupted by errors */ return 0; } return -2; } int vpx_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, int ss_x, int ss_y, #if CONFIG_VP9_HIGHBITDEPTH int use_highbitdepth, #endif int border, int byte_alignment) { if (ybf) { vpx_free_frame_buffer(ybf); return vpx_realloc_frame_buffer(ybf, width, height, ss_x, ss_y, #if CONFIG_VP9_HIGHBITDEPTH use_highbitdepth, #endif border, byte_alignment, NULL, NULL, NULL); } return -2; } #endif