1 files changed, 303 insertions, 0 deletions

diff --git a/media/libvpx/vpx_scale/generic/yv12config.c b/media/libvpx/vpx_scale/generic/yv12config.c
new file mode 100644
index 000000000..7582792d9
--- /dev/null
+++ b/media/libvpx/vpx_scale/generic/yv12config.c
@@ -0,0 +1,303 @@
+/*
+ *  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 "vpx_scale/yv12config.h"
+#include "vpx_mem/vpx_mem.h"
+#include "vpx_ports/mem.h"
+
+/****************************************************************************
+*  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 int frame_size = yplane_size + 2 * uvplane_size;
+
+    if (!ybf->buffer_alloc) {
+      ybf->buffer_alloc = (uint8_t *)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 + 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 vp9_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 vp9_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 (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_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 uint64_t alpha_plane_size = (alpha_height + 2 * alpha_border_h) *
+                                      (uint64_t)alpha_stride + byte_alignment;
+#if CONFIG_VP9_HIGHBITDEPTH
+    const uint64_t frame_size = (1 + use_highbitdepth) *
+        (yplane_size + 2 * uvplane_size + alpha_plane_size);
+#else
+    const uint64_t frame_size = yplane_size + 2 * uvplane_size +
+                                alpha_plane_size;
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+#else
+#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
+#endif  // CONFIG_ALPHA
+
+    uint8_t *buf = NULL;
+
+    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);
+    } else if (frame_size > (size_t)ybf->buffer_alloc_sz) {
+      // Allocation to hold larger frame, or first allocation.
+      vpx_free(ybf->buffer_alloc);
+      ybf->buffer_alloc = NULL;
+
+      if (frame_size != (size_t)frame_size)
+        return -1;
+
+      ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, (size_t)frame_size);
+      if (!ybf->buffer_alloc)
+        return -1;
+
+      ybf->buffer_alloc_sz = (int)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
+     * 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 = (int)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);
+
+#if CONFIG_ALPHA
+    ybf->alpha_width = alpha_width;
+    ybf->alpha_height = alpha_height;
+    ybf->alpha_stride = alpha_stride;
+    ybf->alpha_buffer = (uint8_t *)yv12_align_addr(
+        buf + yplane_size + 2 * uvplane_size +
+        (alpha_border_h * alpha_stride) + alpha_border_w, vp9_byte_align);
+#endif
+    ybf->corrupted = 0; /* assume not corrupted 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,
+#if CONFIG_VP9_HIGHBITDEPTH
+                           int use_highbitdepth,
+#endif
+                           int border,
+                           int byte_alignment) {
+  if (ybf) {
+    vp9_free_frame_buffer(ybf);
+    return vp9_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