/**************************************************************************
 *
 * Copyright 2013 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.
 *
 **************************************************************************/

/*
 * Authors:
 *      Christian König <christian.koenig@amd.com>
 *
 */

#ifdef HAVE_ST_VDPAU

#include "main/texobj.h"
#include "main/teximage.h"
#include "main/errors.h"
#include "program/prog_instruction.h"

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

#include "util/u_inlines.h"

#include "st_vdpau.h"
#include "st_context.h"
#include "st_sampler_view.h"
#include "st_texture.h"
#include "st_format.h"
#include "st_cb_flush.h"

#include "frontend/vdpau_interop.h"
#include "frontend/vdpau_dmabuf.h"
#include "frontend/vdpau_funcs.h"
#include "frontend/drm_driver.h"

static struct pipe_resource *
st_vdpau_video_surface_gallium(struct gl_context *ctx, const void *vdpSurface,
                               GLuint index)
{
   int (*getProcAddr)(uint32_t device, uint32_t id, void **ptr);
   uint32_t device = (uintptr_t)ctx->vdpDevice;
   struct pipe_sampler_view *sv;
   VdpVideoSurfaceGallium *f;

   struct pipe_video_buffer *buffer;
   struct pipe_sampler_view **samplers;
   struct pipe_resource *res = NULL;

   getProcAddr = (void *)ctx->vdpGetProcAddress;
   if (getProcAddr(device, VDP_FUNC_ID_VIDEO_SURFACE_GALLIUM, (void**)&f))
      return NULL;

   buffer = f((uintptr_t)vdpSurface);
   if (!buffer)
      return NULL;

   samplers = buffer->get_sampler_view_planes(buffer);
   if (!samplers)
      return NULL;

   sv = samplers[index >> 1];
   if (!sv)
      return NULL;

   pipe_resource_reference(&res, sv->texture);
   return res;
}

static struct pipe_resource *
st_vdpau_output_surface_gallium(struct gl_context *ctx, const void *vdpSurface)
{
   int (*getProcAddr)(uint32_t device, uint32_t id, void **ptr);
   uint32_t device = (uintptr_t)ctx->vdpDevice;
   struct pipe_resource *res = NULL;
   VdpOutputSurfaceGallium *f;

   getProcAddr = (void *)ctx->vdpGetProcAddress;
   if (getProcAddr(device, VDP_FUNC_ID_OUTPUT_SURFACE_GALLIUM, (void**)&f))
      return NULL;

   pipe_resource_reference(&res, f((uintptr_t)vdpSurface));
   return res;
}

static struct pipe_resource *
st_vdpau_resource_from_description(struct gl_context *ctx,
                                   const struct VdpSurfaceDMABufDesc *desc)
{
   struct st_context *st = st_context(ctx);
   struct pipe_resource templ, *res;
   struct winsys_handle whandle;

   if (desc->handle == -1)
      return NULL;

   memset(&templ, 0, sizeof(templ));
   templ.target = PIPE_TEXTURE_2D;
   templ.last_level = 0;
   templ.depth0 = 1;
   templ.array_size = 1;
   templ.width0 = desc->width;
   templ.height0 = desc->height;
   templ.format = VdpFormatRGBAToPipe(desc->format);
   templ.bind = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;
   templ.usage = PIPE_USAGE_DEFAULT;

   memset(&whandle, 0, sizeof(whandle));
   whandle.type = WINSYS_HANDLE_TYPE_FD;
   whandle.handle = desc->handle;
   whandle.offset = desc->offset;
   whandle.stride = desc->stride;

   res = st->pipe->screen->resource_from_handle(st->pipe->screen, &templ, &whandle,
						PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE);
   close(desc->handle);

   return res;
}

static struct pipe_resource *
st_vdpau_output_surface_dma_buf(struct gl_context *ctx, const void *vdpSurface)
{
   int (*getProcAddr)(uint32_t device, uint32_t id, void **ptr);
   uint32_t device = (uintptr_t)ctx->vdpDevice;

   struct VdpSurfaceDMABufDesc desc;
   VdpOutputSurfaceDMABuf *f;

   getProcAddr = (void *)ctx->vdpGetProcAddress;
   if (getProcAddr(device, VDP_FUNC_ID_OUTPUT_SURFACE_DMA_BUF, (void**)&f))
      return NULL;

   if (f((uintptr_t)vdpSurface, &desc) != VDP_STATUS_OK)
      return NULL;

   return st_vdpau_resource_from_description(ctx, &desc);
}

static struct pipe_resource *
st_vdpau_video_surface_dma_buf(struct gl_context *ctx, const void *vdpSurface,
                               GLuint index)
{
   int (*getProcAddr)(uint32_t device, uint32_t id, void **ptr);
   uint32_t device = (uintptr_t)ctx->vdpDevice;

   struct VdpSurfaceDMABufDesc desc;
   VdpVideoSurfaceDMABuf *f;

   getProcAddr = (void *)ctx->vdpGetProcAddress;
   if (getProcAddr(device, VDP_FUNC_ID_VIDEO_SURFACE_DMA_BUF, (void**)&f))
      return NULL;

   if (f((uintptr_t)vdpSurface, index, &desc) != VDP_STATUS_OK)
      return NULL;

   return st_vdpau_resource_from_description(ctx, &desc);
}

static void
st_vdpau_map_surface(struct gl_context *ctx, GLenum target, GLenum access,
                     GLboolean output, struct gl_texture_object *texObj,
                     struct gl_texture_image *texImage,
                     const void *vdpSurface, GLuint index)
{
   struct st_context *st = st_context(ctx);
   struct pipe_screen *screen = st->pipe->screen;
   struct st_texture_object *stObj = st_texture_object(texObj);
   struct st_texture_image *stImage = st_texture_image(texImage);

   struct pipe_resource *res;
   mesa_format texFormat;
   int layer_override = -1;

   if (output) {
      res = st_vdpau_output_surface_dma_buf(ctx, vdpSurface);

      if (!res)
         res = st_vdpau_output_surface_gallium(ctx, vdpSurface);

   } else {
      res = st_vdpau_video_surface_dma_buf(ctx, vdpSurface, index);

      if (!res) {
         res = st_vdpau_video_surface_gallium(ctx, vdpSurface, index);
         layer_override = index & 1;
      }
   }

   /* If the resource is from a different screen, try re-importing it */
   if (res && res->screen != screen) {
      struct pipe_resource *new_res = NULL;
      struct winsys_handle whandle = { .type = WINSYS_HANDLE_TYPE_FD };
      unsigned usage = PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE;

      if (screen->get_param(screen, PIPE_CAP_DMABUF) &&
          res->screen->get_param(res->screen, PIPE_CAP_DMABUF) &&
          res->screen->resource_get_handle(res->screen, NULL, res, &whandle,
                                           usage)) {
         new_res = screen->resource_from_handle(screen, res, &whandle, usage);
         close(whandle.handle);
      }

      pipe_resource_reference(&res, NULL);
      res = new_res;
   }

   if (!res) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "VDPAUMapSurfacesNV");
      return;
   }

   /* switch to surface based */
   if (!stObj->surface_based) {
      _mesa_clear_texture_object(ctx, texObj, NULL);
      stObj->surface_based = GL_TRUE;
   }

   texFormat = st_pipe_format_to_mesa_format(res->format);

   _mesa_init_teximage_fields(ctx, texImage,
                              res->width0, res->height0, 1, 0, GL_RGBA,
                              texFormat);

   pipe_resource_reference(&stObj->pt, res);
   st_texture_release_all_sampler_views(st, stObj);
   pipe_resource_reference(&stImage->pt, res);

   stObj->surface_format = res->format;
   stObj->level_override = -1;
   stObj->layer_override = layer_override;

   _mesa_dirty_texobj(ctx, texObj);
   pipe_resource_reference(&res, NULL);
}

static void
st_vdpau_unmap_surface(struct gl_context *ctx, GLenum target, GLenum access,
                       GLboolean output, struct gl_texture_object *texObj,
                       struct gl_texture_image *texImage,
                       const void *vdpSurface, GLuint index)
{
   struct st_context *st = st_context(ctx);
   struct st_texture_object *stObj = st_texture_object(texObj);
   struct st_texture_image *stImage = st_texture_image(texImage);

   pipe_resource_reference(&stObj->pt, NULL);
   st_texture_release_all_sampler_views(st, stObj);
   pipe_resource_reference(&stImage->pt, NULL);

   stObj->level_override = -1;
   stObj->layer_override = -1;

   _mesa_dirty_texobj(ctx, texObj);

   /* NV_vdpau_interop does not specify an explicit synchronization mechanism
    * between the GL and VDPAU contexts. Provide automatic synchronization here.
    */
   st_flush(st, NULL, 0);
}

void
st_init_vdpau_functions(struct dd_function_table *functions)
{
   functions->VDPAUMapSurface = st_vdpau_map_surface;
   functions->VDPAUUnmapSurface = st_vdpau_unmap_surface;
}
#endif