src/gallium/auxiliary/vl/vl_video_buffer.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * 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 <assert.h>

 #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_YUVX[3] = {
    PIPE_FORMAT_R8G8B8X8_UNORM,
    PIPE_FORMAT_NONE,
    PIPE_FORMAT_NONE
 };

 const enum pipe_format const_resource_formats_VUYX[3] = {
    PIPE_FORMAT_B8G8R8X8_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_R8G8B8X8_UNORM:
       return const_resource_formats_YUVX;

    case PIPE_FORMAT_B8G8R8X8_UNORM:
       return const_resource_formats_VUYX;

    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 | tmpl->bind;
    templ->usage = usage;

    vl_video_buffer_adjust_size(&templ->width0, &templ->height0, plane,
                                tmpl->chroma_format, false);
 }

 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_X;

          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_X + j;
          sv_templ.swizzle_a = PIPE_SWIZZLE_1;
          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;
 }
	/**************************************************************************
	*
	* 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 <assert.h>

	#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_YUVX[3] = {
	PIPE_FORMAT_R8G8B8X8_UNORM,
	PIPE_FORMAT_NONE,
	PIPE_FORMAT_NONE
	};

	const enum pipe_format const_resource_formats_VUYX[3] = {
	PIPE_FORMAT_B8G8R8X8_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_R8G8B8X8_UNORM:
	return const_resource_formats_YUVX;

	case PIPE_FORMAT_B8G8R8X8_UNORM:
	return const_resource_formats_VUYX;

	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 \| tmpl->bind;
	templ->usage = usage;

	vl_video_buffer_adjust_size(&templ->width0, &templ->height0, plane,
	tmpl->chroma_format, false);
	}

	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_X;

	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_X + j;
	sv_templ.swizzle_a = PIPE_SWIZZLE_1;
	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;
	}