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

 *

 * Copyright 2011 Christian König.

 * 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 VMWARE AND/OR ITS SUPPLIERS 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 

#include "pipe/p_screen.h"

#include "pipe/p_context.h"

#include "pipe/p_state.h"

#include "util/u_format.h"

#include "util/u_inlines.h"

#include "util/u_sampler.h"

#include "util/u_memory.h"

#include "vl_video_buffer.h"

const enum pipe_format const_resource_formats_YV12[3] = {

   PIPE_FORMAT_R8_UNORM,

   PIPE_FORMAT_R8_UNORM,

   PIPE_FORMAT_R8_UNORM

};

const enum pipe_format const_resource_formats_NV12[3] = {

   PIPE_FORMAT_R8_UNORM,

   PIPE_FORMAT_R8G8_UNORM,

   PIPE_FORMAT_NONE

};

const enum pipe_format const_resource_formats_YUVA[3] = {

   PIPE_FORMAT_R8G8B8A8_UNORM,

   PIPE_FORMAT_NONE,

   PIPE_FORMAT_NONE

};

const enum pipe_format const_resource_formats_VUYA[3] = {

   PIPE_FORMAT_B8G8R8A8_UNORM,

   PIPE_FORMAT_NONE,

   PIPE_FORMAT_NONE

};

const enum pipe_format const_resource_formats_YUYV[3] = {

   PIPE_FORMAT_R8G8_R8B8_UNORM,

   PIPE_FORMAT_NONE,

   PIPE_FORMAT_NONE

};

const enum pipe_format const_resource_formats_UYVY[3] = {

   PIPE_FORMAT_G8R8_B8R8_UNORM,

   PIPE_FORMAT_NONE,

   PIPE_FORMAT_NONE

};

const unsigned const_resource_plane_order_YUV[3] = {

   0,

   1,

   2

};

const unsigned const_resource_plane_order_YVU[3] = {

   0,

   2,

   1

};

const enum pipe_format *

vl_video_buffer_formats(struct pipe_screen *screen, enum pipe_format format)

{

   switch(format) {

   case PIPE_FORMAT_YV12:

      return const_resource_formats_YV12;

   case PIPE_FORMAT_NV12:

      return const_resource_formats_NV12;

   case PIPE_FORMAT_R8G8B8A8_UNORM:

      return const_resource_formats_YUVA;

   case PIPE_FORMAT_B8G8R8A8_UNORM:

      return const_resource_formats_VUYA;

   case PIPE_FORMAT_YUYV:

      return const_resource_formats_YUYV;

   case PIPE_FORMAT_UYVY:

      return const_resource_formats_UYVY;

   default:

      return NULL;

   }

}

const unsigned *

vl_video_buffer_plane_order(enum pipe_format format)

{

   switch(format) {

   case PIPE_FORMAT_YV12:

      return const_resource_plane_order_YVU;

   case PIPE_FORMAT_NV12:

   case PIPE_FORMAT_R8G8B8A8_UNORM:

   case PIPE_FORMAT_B8G8R8A8_UNORM:

   case PIPE_FORMAT_YUYV:

   case PIPE_FORMAT_UYVY:

      return const_resource_plane_order_YUV;

   default:

      return NULL;

   }

}

static enum pipe_format

vl_video_buffer_surface_format(enum pipe_format format)

{

   const struct util_format_description *desc = util_format_description(format);

   /* a subsampled formats can't work as surface use RGBA instead */

   if (desc->layout == UTIL_FORMAT_LAYOUT_SUBSAMPLED)

      return PIPE_FORMAT_R8G8B8A8_UNORM;

   return format;

}

boolean

vl_video_buffer_is_format_supported(struct pipe_screen *screen,

                                    enum pipe_format format,

                                    enum pipe_video_profile profile,

                                    enum pipe_video_entrypoint entrypoint)

{

   const enum pipe_format *resource_formats;

   unsigned i;

   resource_formats = vl_video_buffer_formats(screen, format);

   if (!resource_formats)

      return false;

   for (i = 0; i < VL_NUM_COMPONENTS; ++i) {

      enum pipe_format format = resource_formats[i];

      if (format == PIPE_FORMAT_NONE)

         continue;

      /* we at least need to sample from it */

      if (!screen->is_format_supported(screen, format, PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW))

         return false;

      format = vl_video_buffer_surface_format(format);

      if (!screen->is_format_supported(screen, format, PIPE_TEXTURE_2D, 0, PIPE_BIND_RENDER_TARGET))

         return false;

   }

   return true;

}

unsigned

vl_video_buffer_max_size(struct pipe_screen *screen)

{

   uint32_t max_2d_texture_level;

   max_2d_texture_level = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS);

   return 1 << (max_2d_texture_level-1);

}

void

vl_video_buffer_set_associated_data(struct pipe_video_buffer *vbuf,

                                    struct pipe_video_codec *vcodec,

                                    void *associated_data,

                                    void (*destroy_associated_data)(void *))

{

   vbuf->codec = vcodec;

   if (vbuf->associated_data == associated_data)

      return;

   if (vbuf->associated_data)

      vbuf->destroy_associated_data(vbuf->associated_data);

   vbuf->associated_data = associated_data;

   vbuf->destroy_associated_data = destroy_associated_data;

}

void *

vl_video_buffer_get_associated_data(struct pipe_video_buffer *vbuf,

                                    struct pipe_video_codec *vcodec)

{

   if (vbuf->codec == vcodec)

      return vbuf->associated_data;

   else

      return NULL;

}

void

vl_video_buffer_template(struct pipe_resource *templ,

                         const struct pipe_video_buffer *tmpl,

                         enum pipe_format resource_format,

                         unsigned depth, unsigned array_size,

                         unsigned usage, unsigned plane)

{

   memset(templ, 0, sizeof(*templ));

   if (depth > 1)

      templ->target = PIPE_TEXTURE_3D;

   else if (array_size > 1)

      templ->target = PIPE_TEXTURE_2D_ARRAY;

   else

      templ->target = PIPE_TEXTURE_2D;

   templ->format = resource_format;

   templ->width0 = tmpl->width;

   templ->height0 = tmpl->height;

   templ->depth0 = depth;

   templ->array_size = array_size;

   templ->bind = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;

   templ->usage = usage;

   if (plane > 0) {

      if (tmpl->chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420) {

         templ->width0 /= 2;

         templ->height0 /= 2;

      } else if (tmpl->chroma_format == PIPE_VIDEO_CHROMA_FORMAT_422) {

         templ->width0 /= 2;

      }

   }

}

static void

vl_video_buffer_destroy(struct pipe_video_buffer *buffer)

{

   struct vl_video_buffer *buf = (struct vl_video_buffer *)buffer;

   unsigned i;

   assert(buf);

   for (i = 0; i < VL_NUM_COMPONENTS; ++i) {

      pipe_sampler_view_reference(&buf->sampler_view_planes[i], NULL);

      pipe_sampler_view_reference(&buf->sampler_view_components[i], NULL);

      pipe_resource_reference(&buf->resources[i], NULL);

   }

   for (i = 0; i < VL_MAX_SURFACES; ++i)

      pipe_surface_reference(&buf->surfaces[i], NULL);

   vl_video_buffer_set_associated_data(buffer, NULL, NULL, NULL);

   FREE(buffer);

}

static struct pipe_sampler_view **

vl_video_buffer_sampler_view_planes(struct pipe_video_buffer *buffer)

{

   struct vl_video_buffer *buf = (struct vl_video_buffer *)buffer;

   struct pipe_sampler_view sv_templ;

   struct pipe_context *pipe;

   unsigned i;

   assert(buf);

   pipe = buf->base.context;

   for (i = 0; i < buf->num_planes; ++i ) {

      if (!buf->sampler_view_planes[i]) {

         memset(&sv_templ, 0, sizeof(sv_templ));

         u_sampler_view_default_template(&sv_templ, buf->resources[i], buf->resources[i]->format);

         if (util_format_get_nr_components(buf->resources[i]->format) == 1)

            sv_templ.swizzle_r = sv_templ.swizzle_g = sv_templ.swizzle_b = sv_templ.swizzle_a = PIPE_SWIZZLE_RED;

         buf->sampler_view_planes[i] = pipe->create_sampler_view(pipe, buf->resources[i], &sv_templ);

         if (!buf->sampler_view_planes[i])

            goto error;

      }

   }

   return buf->sampler_view_planes;

error:

   for (i = 0; i < buf->num_planes; ++i )

      pipe_sampler_view_reference(&buf->sampler_view_planes[i], NULL);

   return NULL;

}

static struct pipe_sampler_view **

vl_video_buffer_sampler_view_components(struct pipe_video_buffer *buffer)

{

   struct vl_video_buffer *buf = (struct vl_video_buffer *)buffer;

   struct pipe_sampler_view sv_templ;

   struct pipe_context *pipe;

   const enum pipe_format *sampler_format;

   const unsigned *plane_order;

   unsigned i, j, component;

   assert(buf);

   pipe = buf->base.context;

   sampler_format = vl_video_buffer_formats(pipe->screen, buf->base.buffer_format);

   plane_order = vl_video_buffer_plane_order(buf->base.buffer_format);

   for (component = 0, i = 0; i < buf->num_planes; ++i ) {

      struct pipe_resource *res = buf->resources[plane_order[i]];

      const struct util_format_description *desc = util_format_description(res->format);

      unsigned nr_components = util_format_get_nr_components(res->format);

      if (desc->layout == UTIL_FORMAT_LAYOUT_SUBSAMPLED)

         nr_components = 3;

      for (j = 0; j < nr_components && component < VL_NUM_COMPONENTS; ++j, ++component) {

         if (buf->sampler_view_components[component])

            continue;

         memset(&sv_templ, 0, sizeof(sv_templ));

         u_sampler_view_default_template(&sv_templ, res, sampler_format[plane_order[i]]);

         sv_templ.swizzle_r = sv_templ.swizzle_g = sv_templ.swizzle_b = PIPE_SWIZZLE_RED + j;

         sv_templ.swizzle_a = PIPE_SWIZZLE_ONE;

         buf->sampler_view_components[component] = pipe->create_sampler_view(pipe, res, &sv_templ);

         if (!buf->sampler_view_components[component])

            goto error;

      }

   }

   assert(component == VL_NUM_COMPONENTS);

   return buf->sampler_view_components;

error:

   for (i = 0; i < VL_NUM_COMPONENTS; ++i )

      pipe_sampler_view_reference(&buf->sampler_view_components[i], NULL);

   return NULL;

}

static struct pipe_surface **

vl_video_buffer_surfaces(struct pipe_video_buffer *buffer)

{

   struct vl_video_buffer *buf = (struct vl_video_buffer *)buffer;

   struct pipe_surface surf_templ;

   struct pipe_context *pipe;

   unsigned i, j, array_size, surf;

   assert(buf);

   pipe = buf->base.context;

   array_size = buffer->interlaced ? 2 : 1;

   for (i = 0, surf = 0; i < VL_NUM_COMPONENTS; ++i) {

      for (j = 0; j < array_size; ++j, ++surf) {

         assert(surf < VL_MAX_SURFACES);

         if (!buf->resources[i]) {

            pipe_surface_reference(&buf->surfaces[surf], NULL);

            continue;

         }

         if (!buf->surfaces[surf]) {

            memset(&surf_templ, 0, sizeof(surf_templ));

            surf_templ.format = vl_video_buffer_surface_format(buf->resources[i]->format);

            surf_templ.u.tex.first_layer = surf_templ.u.tex.last_layer = j;

            buf->surfaces[surf] = pipe->create_surface(pipe, buf->resources[i], &surf_templ);

            if (!buf->surfaces[surf])

               goto error;

         }

      }

   }

   return buf->surfaces;

error:

   for (i = 0; i < VL_MAX_SURFACES; ++i )

      pipe_surface_reference(&buf->surfaces[i], NULL);

   return NULL;

}

struct pipe_video_buffer *

vl_video_buffer_create(struct pipe_context *pipe,

                       const struct pipe_video_buffer *tmpl)

{

   const enum pipe_format *resource_formats;

   struct pipe_video_buffer templat, *result;

   bool pot_buffers;

   assert(pipe);

   assert(tmpl->width > 0 && tmpl->height > 0);

   pot_buffers = !pipe->screen->get_video_param

   (

      pipe->screen,

      PIPE_VIDEO_PROFILE_UNKNOWN,

      PIPE_VIDEO_ENTRYPOINT_UNKNOWN,

      PIPE_VIDEO_CAP_NPOT_TEXTURES

   );

   resource_formats = vl_video_buffer_formats(pipe->screen, tmpl->buffer_format);

   if (!resource_formats)

      return NULL;

   templat = *tmpl;

   templat.width = pot_buffers ? util_next_power_of_two(tmpl->width)

                 : align(tmpl->width, VL_MACROBLOCK_WIDTH);

   templat.height = pot_buffers ? util_next_power_of_two(tmpl->height)

                  : align(tmpl->height, VL_MACROBLOCK_HEIGHT);

   if (tmpl->interlaced)

      templat.height /= 2;

   result = vl_video_buffer_create_ex

   (

      pipe, &templat, resource_formats,

      1, tmpl->interlaced ? 2 : 1, PIPE_USAGE_DEFAULT

   );

   if (result && tmpl->interlaced)

      result->height *= 2;

   return result;

}

struct pipe_video_buffer *

vl_video_buffer_create_ex(struct pipe_context *pipe,

                          const struct pipe_video_buffer *tmpl,

                          const enum pipe_format resource_formats[VL_NUM_COMPONENTS],

                          unsigned depth, unsigned array_size, unsigned usage)

{

   struct pipe_resource res_tmpl;

   struct pipe_resource *resources[VL_NUM_COMPONENTS];

   unsigned i;

   assert(pipe);

   memset(resources, 0, sizeof resources);

   vl_video_buffer_template(&res_tmpl, tmpl, resource_formats[0], depth, array_size, usage, 0);

   resources[0] = pipe->screen->resource_create(pipe->screen, &res_tmpl);

   if (!resources[0])

      goto error;

   if (resource_formats[1] == PIPE_FORMAT_NONE) {

      assert(resource_formats[2] == PIPE_FORMAT_NONE);

      return vl_video_buffer_create_ex2(pipe, tmpl, resources);

   }

   vl_video_buffer_template(&res_tmpl, tmpl, resource_formats[1], depth, array_size, usage, 1);

   resources[1] = pipe->screen->resource_create(pipe->screen, &res_tmpl);

   if (!resources[1])

      goto error;

   if (resource_formats[2] == PIPE_FORMAT_NONE)

      return vl_video_buffer_create_ex2(pipe, tmpl, resources);

   vl_video_buffer_template(&res_tmpl, tmpl, resource_formats[2], depth, array_size, usage, 2);

   resources[2] = pipe->screen->resource_create(pipe->screen, &res_tmpl);

   if (!resources[2])

      goto error;

   return vl_video_buffer_create_ex2(pipe, tmpl, resources);

error:

   for (i = 0; i < VL_NUM_COMPONENTS; ++i)

      pipe_resource_reference(&resources[i], NULL);

   return NULL;

}

struct pipe_video_buffer *

vl_video_buffer_create_ex2(struct pipe_context *pipe,

                           const struct pipe_video_buffer *tmpl,

                           struct pipe_resource *resources[VL_NUM_COMPONENTS])

{

   struct vl_video_buffer *buffer;

   unsigned i;

   buffer = CALLOC_STRUCT(vl_video_buffer);

   if (!buffer)

      return NULL;

   buffer->base = *tmpl;

   buffer->base.context = pipe;

   buffer->base.destroy = vl_video_buffer_destroy;

   buffer->base.get_sampler_view_planes = vl_video_buffer_sampler_view_planes;

   buffer->base.get_sampler_view_components = vl_video_buffer_sampler_view_components;

   buffer->base.get_surfaces = vl_video_buffer_surfaces;

   buffer->num_planes = 0;

   for (i = 0; i < VL_NUM_COMPONENTS; ++i) {

      buffer->resources[i] = resources[i];

      if (resources[i])

         buffer->num_planes++;

   }

   return &buffer->base;

}