/*

 * 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/internal/aom_image_internal.h"

#include "aom_mem/aom_mem.h"

#include "aom_ports/mem.h"

#include "aom_scale/yv12config.h"

#include "av1/common/enums.h"

/****************************************************************************

 *  Exports

 ****************************************************************************/

/****************************************************************************

 *

 ****************************************************************************/

// 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);

    aom_remove_metadata_from_frame_buffer(ybf);

    /* 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));

    return 0;

  }

  return AOM_CODEC_MEM_ERROR;

}

static int realloc_frame_buffer_aligned(

    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, const int y_stride, const uint64_t yplane_size,

    const uint64_t uvplane_size, const int aligned_width,

    const int aligned_height, const int uv_width, const int uv_height,

    const int uv_stride, const int uv_border_w, const int uv_border_h,

    int alloc_y_buffer_8bit) {

  if (ybf) {

    const int aom_byte_align = (byte_alignment == 0) ? 1 : 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 AOM_CODEC_MEM_ERROR;

#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 AOM_CODEC_MEM_ERROR;

      // Allocation to hold larger frame, or first allocation.

      if (cb(cb_priv, (size_t)external_frame_size, fb) < 0)

        return AOM_CODEC_MEM_ERROR;

      if (fb->data == NULL || fb->size < external_frame_size)

        return AOM_CODEC_MEM_ERROR;

      ybf->buffer_alloc = (uint8_t *)aom_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.

      aom_free(ybf->buffer_alloc);

      ybf->buffer_alloc = NULL;

      ybf->buffer_alloc_sz = 0;

      if (frame_size != (size_t)frame_size) return AOM_CODEC_MEM_ERROR;

      ybf->buffer_alloc = (uint8_t *)aom_memalign(32, (size_t)frame_size);

      if (!ybf->buffer_alloc) return AOM_CODEC_MEM_ERROR;

      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 (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 *)aom_align_addr(

        buf + (border * y_stride) + border, aom_byte_align);

    ybf->u_buffer = (uint8_t *)aom_align_addr(

        buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w,

        aom_byte_align);

    ybf->v_buffer =

        (uint8_t *)aom_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 && alloc_y_buffer_8bit) {

      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 AOM_CODEC_MEM_ERROR;

    } 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 AOM_CODEC_MEM_ERROR;

}

static int calc_stride_and_planesize(const int ss_x, const int ss_y,

                                     const int aligned_width,

                                     const int aligned_height, const int border,

                                     const int byte_alignment, int *y_stride,

                                     int *uv_stride, uint64_t *yplane_size,

                                     uint64_t *uvplane_size,

                                     const int uv_height) {

  /* 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 AOM_CODEC_MEM_ERROR;

  *y_stride = aom_calc_y_stride(aligned_width, border);

  *yplane_size =

      (aligned_height + 2 * border) * (uint64_t)(*y_stride) + byte_alignment;

  *uv_stride = *y_stride >> ss_x;

  *uvplane_size = (uv_height + 2 * (border >> ss_y)) * (uint64_t)(*uv_stride) +

                  byte_alignment;

  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,

                             int alloc_y_buffer_8bit) {

#if CONFIG_SIZE_LIMIT

  if (width > DECODE_WIDTH_LIMIT || height > DECODE_HEIGHT_LIMIT)

    return AOM_CODEC_MEM_ERROR;

#endif

  if (ybf) {

    int y_stride = 0;

    int uv_stride = 0;

    uint64_t yplane_size = 0;

    uint64_t uvplane_size = 0;

    const int aligned_width = (width + 7) & ~7;

    const int aligned_height = (height + 7) & ~7;

    const int uv_width = aligned_width >> ss_x;

    const int uv_height = aligned_height >> ss_y;

    const int uv_border_w = border >> ss_x;

    const int uv_border_h = border >> ss_y;

    int error = calc_stride_and_planesize(

        ss_x, ss_y, aligned_width, aligned_height, border, byte_alignment,

        &y_stride, &uv_stride, &yplane_size, &uvplane_size, uv_height);

    if (error) return error;

    return realloc_frame_buffer_aligned(

        ybf, width, height, ss_x, ss_y, use_highbitdepth, border,

        byte_alignment, fb, cb, cb_priv, y_stride, yplane_size, uvplane_size,

        aligned_width, aligned_height, uv_width, uv_height, uv_stride,

        uv_border_w, uv_border_h, alloc_y_buffer_8bit);

  }

  return AOM_CODEC_MEM_ERROR;

}

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, 0);

  }

  return AOM_CODEC_MEM_ERROR;

}

void aom_remove_metadata_from_frame_buffer(YV12_BUFFER_CONFIG *ybf) {

  if (ybf && ybf->metadata) {

    aom_img_metadata_array_free(ybf->metadata);

    ybf->metadata = NULL;

  }

}

int aom_copy_metadata_to_frame_buffer(YV12_BUFFER_CONFIG *ybf,

                                      const aom_metadata_array_t *arr) {

  if (!ybf || !arr || !arr->metadata_array) return -1;

  if (ybf->metadata == arr) return 0;

  aom_remove_metadata_from_frame_buffer(ybf);

  ybf->metadata = aom_img_metadata_array_alloc(arr->sz);

  if (!ybf->metadata) return -1;

  for (size_t i = 0; i < ybf->metadata->sz; i++) {

    ybf->metadata->metadata_array[i] = aom_img_metadata_alloc(

        arr->metadata_array[i]->type, arr->metadata_array[i]->payload,

        arr->metadata_array[i]->sz, arr->metadata_array[i]->insert_flag);

    if (ybf->metadata->metadata_array[i] == NULL) {

      aom_img_metadata_array_free(ybf->metadata);

      ybf->metadata = NULL;

      return -1;

    }

  }

  ybf->metadata->sz = arr->sz;

  return 0;

}