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-rw-r--r--media/libaom/src/aom_scale/generic/yv12config.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/media/libaom/src/aom_scale/generic/yv12config.c b/media/libaom/src/aom_scale/generic/yv12config.c
new file mode 100644
index 000000000..84705e2d8
--- /dev/null
+++ b/media/libaom/src/aom_scale/generic/yv12config.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <assert.h>
+
+#include "aom_mem/aom_mem.h"
+#include "aom_ports/mem.h"
+#include "aom_scale/yv12config.h"
+#include "av1/common/enums.h"
+
+/****************************************************************************
+ * Exports
+ ****************************************************************************/
+
+/****************************************************************************
+ *
+ ****************************************************************************/
+#define yv12_align_addr(addr, align) \
+ (void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align))
+
+// TODO(jkoleszar): Maybe replace this with struct aom_image
+
+int aom_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
+ if (ybf) {
+ if (ybf->buffer_alloc_sz > 0) {
+ aom_free(ybf->buffer_alloc);
+ }
+ if (ybf->y_buffer_8bit) aom_free(ybf->y_buffer_8bit);
+
+ /* 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 aom_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
+ int ss_x, int ss_y, int use_highbitdepth,
+ int border, int byte_alignment,
+ aom_codec_frame_buffer_t *fb,
+ aom_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
+
+ if (ybf) {
+ const int aom_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;
+
+ const uint64_t frame_size =
+ (1 + use_highbitdepth) * (yplane_size + 2 * uvplane_size);
+
+ uint8_t *buf = NULL;
+
+#if defined AOM_MAX_ALLOCABLE_MEMORY
+ // The size of ybf->buffer_alloc.
+ uint64_t alloc_size = frame_size;
+ // The size of ybf->y_buffer_8bit.
+ if (use_highbitdepth) alloc_size += yplane_size;
+ // 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 (alloc_size > AOM_MAX_ALLOCABLE_MEMORY / REF_FRAMES) return -1;
+#endif
+
+ 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 > (size_t)ybf->buffer_alloc_sz) {
+ // Allocation to hold larger frame, or first allocation.
+ aom_free(ybf->buffer_alloc);
+ ybf->buffer_alloc = NULL;
+
+ if (frame_size != (size_t)frame_size) return -1;
+
+ ybf->buffer_alloc = (uint8_t *)aom_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);
+ }
+
+ /* 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
+ * aom_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 = (size_t)frame_size;
+ ybf->subsampling_x = ss_x;
+ ybf->subsampling_y = ss_y;
+
+ buf = ybf->buffer_alloc;
+ 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;
+ }
+
+ ybf->y_buffer = (uint8_t *)yv12_align_addr(
+ buf + (border * y_stride) + border, aom_byte_align);
+ ybf->u_buffer = (uint8_t *)yv12_align_addr(
+ buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w,
+ aom_byte_align);
+ ybf->v_buffer =
+ (uint8_t *)yv12_align_addr(buf + yplane_size + uvplane_size +
+ (uv_border_h * uv_stride) + uv_border_w,
+ aom_byte_align);
+
+ ybf->use_external_reference_buffers = 0;
+
+ if (use_highbitdepth) {
+ if (ybf->y_buffer_8bit) aom_free(ybf->y_buffer_8bit);
+ ybf->y_buffer_8bit = (uint8_t *)aom_memalign(32, (size_t)yplane_size);
+ if (!ybf->y_buffer_8bit) return -1;
+ } else {
+ if (ybf->y_buffer_8bit) {
+ aom_free(ybf->y_buffer_8bit);
+ ybf->y_buffer_8bit = NULL;
+ ybf->buf_8bit_valid = 0;
+ }
+ }
+
+ ybf->corrupted = 0; /* assume not corrupted by errors */
+ return 0;
+ }
+ return -2;
+}
+
+int aom_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
+ int ss_x, int ss_y, int use_highbitdepth, int border,
+ int byte_alignment) {
+ if (ybf) {
+ aom_free_frame_buffer(ybf);
+ return aom_realloc_frame_buffer(ybf, width, height, ss_x, ss_y,
+ use_highbitdepth, border, byte_alignment,
+ NULL, NULL, NULL);
+ }
+ return -2;
+}