/*

 *  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 (!ybf->buffer_alloc) {

        ybf->buffer_alloc_sz = 0;

        return -1;

      }

#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_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