/**************************************************************************
 *
 * Copyright 2010 Thomas Balling Sørensen & Orasanu Lucian.
 * Copyright 2014 Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "pipe/p_screen.h"
#include "pipe/p_video_codec.h"

#include "util/u_memory.h"
#include "util/u_handle_table.h"
#include "util/u_rect.h"
#include "util/u_sampler.h"
#include "util/u_surface.h"

#include "vl/vl_compositor.h"
#include "vl/vl_winsys.h"

#include "va_private.h"

VAStatus
vlVaCreateSurfaces(VADriverContextP ctx, int width, int height, int format,
                   int num_surfaces, VASurfaceID *surfaces)
{
   struct pipe_video_buffer templat = {};
   struct pipe_screen *pscreen;
   vlVaDriver *drv;
   int i;

   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   if (!(width && height))
      return VA_STATUS_ERROR_INVALID_IMAGE_FORMAT;

   drv = VL_VA_DRIVER(ctx);
   pscreen = VL_VA_PSCREEN(ctx);

   templat.buffer_format = pscreen->get_video_param
   (
      pscreen,
      PIPE_VIDEO_PROFILE_UNKNOWN,
      PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
      PIPE_VIDEO_CAP_PREFERED_FORMAT
   );
   templat.chroma_format = ChromaToPipe(format);
   templat.width = width;
   templat.height = height;
   templat.interlaced = pscreen->get_video_param
   (
      pscreen,
      PIPE_VIDEO_PROFILE_UNKNOWN,
      PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
      PIPE_VIDEO_CAP_PREFERS_INTERLACED
   );

   for (i = 0; i < num_surfaces; ++i) {
      vlVaSurface *surf = CALLOC(1, sizeof(vlVaSurface));
      if (!surf)
         goto no_res;

      surf->templat = templat;
      surf->buffer = drv->pipe->create_video_buffer(drv->pipe, &templat);
      util_dynarray_init(&surf->subpics);
      surfaces[i] = handle_table_add(drv->htab, surf);
   }

   return VA_STATUS_SUCCESS;

no_res:
   if (i)
      vlVaDestroySurfaces(ctx, surfaces, i);

   return VA_STATUS_ERROR_ALLOCATION_FAILED;
}

VAStatus
vlVaDestroySurfaces(VADriverContextP ctx, VASurfaceID *surface_list, int num_surfaces)
{
   vlVaDriver *drv;
   int i;

   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   drv = VL_VA_DRIVER(ctx);
   for (i = 0; i < num_surfaces; ++i) {
      vlVaSurface *surf = handle_table_get(drv->htab, surface_list[i]);
      if (surf->buffer)
         surf->buffer->destroy(surf->buffer);
      if(surf->fence)
         drv->pipe->screen->fence_reference(drv->pipe->screen, &surf->fence, NULL);
      util_dynarray_fini(&surf->subpics);
      FREE(surf);
      handle_table_remove(drv->htab, surface_list[i]);
   }

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaSyncSurface(VADriverContextP ctx, VASurfaceID render_target)
{
   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaQuerySurfaceStatus(VADriverContextP ctx, VASurfaceID render_target, VASurfaceStatus *status)
{
   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaQuerySurfaceError(VADriverContextP ctx, VASurfaceID render_target, VAStatus error_status, void **error_info)
{
   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   return VA_STATUS_ERROR_UNIMPLEMENTED;
}

static void
upload_sampler(struct pipe_context *pipe, struct pipe_sampler_view *dst,
               const struct pipe_box *dst_box, const void *src, unsigned src_stride,
               unsigned src_x, unsigned src_y)
{
   struct pipe_transfer *transfer;
   void *map;

   map = pipe->transfer_map(pipe, dst->texture, 0, PIPE_TRANSFER_WRITE,
                            dst_box, &transfer);
   if (!map)
      return;

   util_copy_rect(map, dst->texture->format, transfer->stride, 0, 0,
                  dst_box->width, dst_box->height,
                  src, src_stride, src_x, src_y);

   pipe->transfer_unmap(pipe, transfer);
}

static VAStatus
vlVaPutSubpictures(vlVaSurface *surf, vlVaDriver *drv,
                   struct pipe_surface *surf_draw, struct u_rect *dirty_area,
                   struct u_rect *src_rect, struct u_rect *dst_rect)
{
   vlVaSubpicture *sub;
   int i;

   if (!(surf->subpics.data || surf->subpics.size))
      return VA_STATUS_SUCCESS;

   for (i = 0; i < surf->subpics.size/sizeof(vlVaSubpicture *); i++) {
      struct pipe_blend_state blend;
      void *blend_state;
      vlVaBuffer *buf;
      struct pipe_box box;
      struct u_rect *s, *d, sr, dr, c;
      int sw, sh, dw, dh;

      sub = ((vlVaSubpicture **)surf->subpics.data)[i];
      if (!sub)
         continue;

      buf = handle_table_get(drv->htab, sub->image->buf);
      if (!buf)
         return VA_STATUS_ERROR_INVALID_IMAGE;

      box.x = 0;
      box.y = 0;
      box.z = 0;
      box.width = sub->dst_rect.x1 - sub->dst_rect.x0;
      box.height = sub->dst_rect.y1 - sub->dst_rect.y0;
      box.depth = 1;

      s = &sub->src_rect;
      d = &sub->dst_rect;
      sw = s->x1 - s->x0;
      sh = s->y1 - s->y0;
      dw = d->x1 - d->x0;
      dh = d->y1 - d->y0;
      c.x0 = MAX2(d->x0, s->x0);
      c.y0 = MAX2(d->y0, s->y0);
      c.x1 = MIN2(d->x0 + dw, src_rect->x1);
      c.y1 = MIN2(d->y0 + dh, src_rect->y1);
      sr.x0 = s->x0 + (c.x0 - d->x0)*(sw/(float)dw);
      sr.y0 = s->y0 + (c.y0 - d->y0)*(sh/(float)dh);
      sr.x1 = s->x0 + (c.x1 - d->x0)*(sw/(float)dw);
      sr.y1 = s->y0 + (c.y1 - d->y0)*(sh/(float)dh);

      s = src_rect;
      d = dst_rect;
      sw = s->x1 - s->x0;
      sh = s->y1 - s->y0;
      dw = d->x1 - d->x0;
      dh = d->y1 - d->y0;
      dr.x0 = d->x0 + c.x0*(dw/(float)sw);
      dr.y0 = d->y0 + c.y0*(dh/(float)sh);
      dr.x1 = d->x0 + c.x1*(dw/(float)sw);
      dr.y1 = d->y0 + c.y1*(dh/(float)sh);

      memset(&blend, 0, sizeof(blend));
      blend.independent_blend_enable = 0;
      blend.rt[0].blend_enable = 1;
      blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
      blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ZERO;
      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
      blend.rt[0].rgb_func = PIPE_BLEND_ADD;
      blend.rt[0].alpha_func = PIPE_BLEND_ADD;
      blend.rt[0].colormask = PIPE_MASK_RGBA;
      blend.logicop_enable = 0;
      blend.logicop_func = PIPE_LOGICOP_CLEAR;
      blend.dither = 0;
      blend_state = drv->pipe->create_blend_state(drv->pipe, &blend);

      vl_compositor_clear_layers(&drv->cstate);
      vl_compositor_set_layer_blend(&drv->cstate, 0, blend_state, false);
      upload_sampler(drv->pipe, sub->sampler, &box, buf->data,
                     sub->image->pitches[0], 0, 0);
      vl_compositor_set_rgba_layer(&drv->cstate, &drv->compositor, 0, sub->sampler,
                                   &sr, NULL, NULL);
      vl_compositor_set_layer_dst_area(&drv->cstate, 0, &dr);
      vl_compositor_render(&drv->cstate, &drv->compositor, surf_draw, dirty_area, false);
      drv->pipe->delete_blend_state(drv->pipe, blend_state);
   }

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaPutSurface(VADriverContextP ctx, VASurfaceID surface_id, void* draw, short srcx, short srcy,
               unsigned short srcw, unsigned short srch, short destx, short desty,
               unsigned short destw, unsigned short desth, VARectangle *cliprects,
               unsigned int number_cliprects,  unsigned int flags)
{
   vlVaDriver *drv;
   vlVaSurface *surf;
   struct pipe_screen *screen;
   struct pipe_resource *tex;
   struct pipe_surface surf_templ, *surf_draw;
   struct u_rect src_rect, *dirty_area;
   struct u_rect dst_rect = {destx, destx + destw, desty, desty + desth};
   VAStatus status;

   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   drv = VL_VA_DRIVER(ctx);
   surf = handle_table_get(drv->htab, surface_id);
   if (!surf)
      return VA_STATUS_ERROR_INVALID_SURFACE;

   screen = drv->pipe->screen;

   if(surf->fence) {
      screen->fence_finish(screen, surf->fence, PIPE_TIMEOUT_INFINITE);
      screen->fence_reference(screen, &surf->fence, NULL);
   }

   tex = vl_screen_texture_from_drawable(drv->vscreen, (Drawable)draw);
   if (!tex)
      return VA_STATUS_ERROR_INVALID_DISPLAY;

   dirty_area = vl_screen_get_dirty_area(drv->vscreen);

   memset(&surf_templ, 0, sizeof(surf_templ));
   surf_templ.format = tex->format;
   surf_draw = drv->pipe->create_surface(drv->pipe, tex, &surf_templ);
   if (!surf_draw) {
      pipe_resource_reference(&tex, NULL);
      return VA_STATUS_ERROR_INVALID_DISPLAY;
   }

   src_rect.x0 = srcx;
   src_rect.y0 = srcy;
   src_rect.x1 = srcw + srcx;
   src_rect.y1 = srch + srcy;

   vl_compositor_clear_layers(&drv->cstate);
   vl_compositor_set_buffer_layer(&drv->cstate, &drv->compositor, 0, surf->buffer, &src_rect, NULL, VL_COMPOSITOR_WEAVE);
   vl_compositor_set_layer_dst_area(&drv->cstate, 0, &dst_rect);
   vl_compositor_render(&drv->cstate, &drv->compositor, surf_draw, dirty_area, true);

   status = vlVaPutSubpictures(surf, drv, surf_draw, dirty_area, &src_rect, &dst_rect);
   if (status)
      return status;

   screen->flush_frontbuffer
   (
      screen, tex, 0, 0,
      vl_screen_get_private(drv->vscreen), NULL
   );

   screen->fence_reference(screen, &surf->fence, NULL);
   drv->pipe->flush(drv->pipe, &surf->fence, 0);

   pipe_resource_reference(&tex, NULL);
   pipe_surface_reference(&surf_draw, NULL);

   return VA_STATUS_SUCCESS;
}

VAStatus
vlVaLockSurface(VADriverContextP ctx, VASurfaceID surface, unsigned int *fourcc,
                unsigned int *luma_stride, unsigned int *chroma_u_stride, unsigned int *chroma_v_stride,
                unsigned int *luma_offset, unsigned int *chroma_u_offset, unsigned int *chroma_v_offset,
                unsigned int *buffer_name, void **buffer)
{
   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   return VA_STATUS_ERROR_UNIMPLEMENTED;
}

VAStatus
vlVaUnlockSurface(VADriverContextP ctx, VASurfaceID surface)
{
   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   return VA_STATUS_ERROR_UNIMPLEMENTED;
}