src/gallium/auxiliary/vl/vl_vertex_buffers.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Christian König
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <assert.h>
  29 #include <util/u_format.h>
  30 #include "vl_vertex_buffers.h"
  31 #include "vl_types.h"
  32
  33 struct vl_vertex_stream
  34 {
  35    struct vertex2s pos;
  36    uint8_t eb[3][2][2];
  37    uint8_t dct_type_field;
  38    uint8_t mb_type_intra;
  39    uint8_t mv_wheights[2];
  40    struct vertex2s mv[4];
  41 };
  42
  43 /* vertices for a quad covering a block */
  44 static const struct vertex2f block_quad[4] = {
  45    {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}
  46 };
  47
  48 struct pipe_vertex_buffer
  49 vl_vb_upload_quads(struct pipe_context *pipe, unsigned blocks_x, unsigned blocks_y)
  50 {
  51    struct pipe_vertex_buffer quad;
  52    struct pipe_transfer *buf_transfer;
  53    struct vertex4f *v;
  54
  55    unsigned x, y, i;
  56
  57    assert(pipe);
  58
  59    /* create buffer */
  60    quad.stride = sizeof(struct vertex4f);
  61    quad.buffer_offset = 0;
  62    quad.buffer = pipe_buffer_create
  63    (
  64       pipe->screen,
  65       PIPE_BIND_VERTEX_BUFFER,
  66       PIPE_USAGE_STATIC,
  67       sizeof(struct vertex4f) * 4 * blocks_x * blocks_y
  68    );
  69
  70    if(!quad.buffer)
  71       return quad;
  72
  73    /* and fill it */
  74    v = pipe_buffer_map
  75    (
  76       pipe,
  77       quad.buffer,
  78       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
  79       &buf_transfer
  80    );
  81
  82    for ( y = 0; y < blocks_y; ++y) {
  83       for ( x = 0; x < blocks_x; ++x) {
  84          for (i = 0; i < 4; ++i, ++v) {
  85             v->x = block_quad[i].x;
  86             v->y = block_quad[i].y;
  87
  88             v->z = x;
  89             v->w = y;
  90          }
  91       }
  92    }
  93
  94    pipe_buffer_unmap(pipe, buf_transfer);
  95
  96    return quad;
  97 }
  98
  99 static struct pipe_vertex_element
 100 vl_vb_get_quad_vertex_element(void)
 101 {
 102    struct pipe_vertex_element element;
 103
 104    /* setup rectangle element */
 105    element.src_offset = 0;
 106    element.instance_divisor = 0;
 107    element.vertex_buffer_index = 0;
 108    element.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 109
 110    return element;
 111 }
 112
 113 static void
 114 vl_vb_element_helper(struct pipe_vertex_element* elements, unsigned num_elements,
 115                               unsigned vertex_buffer_index)
 116 {
 117    unsigned i, offset = 0;
 118
 119    assert(elements && num_elements);
 120
 121    for ( i = 0; i < num_elements; ++i ) {
 122       if (elements[i].src_offset)
 123          offset = elements[i].src_offset;
 124       else
 125          elements[i].src_offset = offset;
 126       elements[i].instance_divisor = 1;
 127       elements[i].vertex_buffer_index = vertex_buffer_index;
 128       offset += util_format_get_blocksize(elements[i].src_format);
 129    }
 130 }
 131
 132 void *
 133 vl_vb_get_elems_state(struct pipe_context *pipe, int component)
 134 {
 135    struct pipe_vertex_element vertex_elems[NUM_VS_INPUTS];
 136
 137    memset(&vertex_elems, 0, sizeof(vertex_elems));
 138    vertex_elems[VS_I_RECT] = vl_vb_get_quad_vertex_element();
 139
 140    /* Position element */
 141    vertex_elems[VS_I_VPOS].src_format = PIPE_FORMAT_R16G16_SSCALED;
 142
 143    /* empty block element of selected component */
 144    vertex_elems[VS_I_EB].src_offset = 4 + component * 4;
 145    vertex_elems[VS_I_EB].src_format = PIPE_FORMAT_R8G8B8A8_USCALED;
 146
 147    /* flags */
 148    vertex_elems[VS_I_FLAGS].src_offset = 16;
 149    vertex_elems[VS_I_FLAGS].src_format = PIPE_FORMAT_R8G8B8A8_UNORM;
 150
 151    /* motion vector 0 TOP element */
 152    vertex_elems[VS_I_MV0_TOP].src_format = PIPE_FORMAT_R16G16_SSCALED;
 153
 154    /* motion vector 0 BOTTOM element */
 155    vertex_elems[VS_I_MV0_BOTTOM].src_format = PIPE_FORMAT_R16G16_SSCALED;
 156
 157    /* motion vector 1 TOP element */
 158    vertex_elems[VS_I_MV1_TOP].src_format = PIPE_FORMAT_R16G16_SSCALED;
 159
 160    /* motion vector 1 BOTTOM element */
 161    vertex_elems[VS_I_MV1_BOTTOM].src_format = PIPE_FORMAT_R16G16_SSCALED;
 162
 163    vl_vb_element_helper(&vertex_elems[VS_I_VPOS], NUM_VS_INPUTS - 1, 1);
 164
 165    return pipe->create_vertex_elements_state(pipe, NUM_VS_INPUTS, vertex_elems);
 166 }
 167
 168 struct pipe_vertex_buffer
 169 vl_vb_init(struct vl_vertex_buffer *buffer, struct pipe_context *pipe, unsigned size)
 170 {
 171    struct pipe_vertex_buffer buf;
 172
 173    assert(buffer);
 174
 175    buffer->size = size;
 176    buffer->num_not_empty = 0;
 177    buffer->num_empty = 0;
 178
 179    buf.stride = sizeof(struct vl_vertex_stream);
 180    buf.buffer_offset = 0;
 181    buf.buffer = pipe_buffer_create
 182    (
 183       pipe->screen,
 184       PIPE_BIND_VERTEX_BUFFER,
 185       PIPE_USAGE_STREAM,
 186       sizeof(struct vl_vertex_stream) * size
 187    );
 188
 189    pipe_resource_reference(&buffer->resource, buf.buffer);
 190
 191    vl_vb_map(buffer, pipe);
 192
 193    return buf;
 194 }
 195
 196 void
 197 vl_vb_map(struct vl_vertex_buffer *buffer, struct pipe_context *pipe)
 198 {
 199    assert(buffer && pipe);
 200
 201    buffer->start = pipe_buffer_map
 202    (
 203       pipe,
 204       buffer->resource,
 205       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
 206       &buffer->transfer
 207    );
 208    buffer->end = buffer->start + buffer->resource->width0 / sizeof(struct vl_vertex_stream);
 209 }
 210
 211 static void
 212 get_motion_vectors(struct pipe_mpeg12_macroblock *mb, struct vertex2s mv[4])
 213 {
 214    if (mb->mo_type == PIPE_MPEG12_MOTION_TYPE_FRAME) {
 215       mv[0].x = mv[1].x = mb->mv[0].top.x;
 216       mv[0].y = mv[1].y = mb->mv[0].top.y;
 217       mv[2].x = mv[3].x = mb->mv[1].top.x;
 218       mv[2].y = mv[3].y = mb->mv[1].top.y;
 219
 220    } else {
 221       mv[0].x = mb->mv[0].top.x;
 222       mv[0].y = mb->mv[0].top.y - (mb->mv[0].top.y % 4);
 223
 224       mv[1].x = mb->mv[0].bottom.x;
 225       mv[1].y = mb->mv[0].bottom.y - (mb->mv[0].bottom.y % 4);
 226
 227       if (mb->mv[0].top.field_select) mv[0].y += 2;
 228       if (!mb->mv[0].bottom.field_select) mv[1].y -= 2;
 229
 230       mv[2].x = mb->mv[1].top.x;
 231       mv[2].y = mb->mv[1].top.y - (mb->mv[1].top.y % 4);
 232
 233       mv[3].x = mb->mv[1].bottom.x;
 234       mv[3].y = mb->mv[1].bottom.y - (mb->mv[1].bottom.y % 4);
 235
 236       if (mb->mv[1].top.field_select) mv[2].y += 2;
 237       if (!mb->mv[1].bottom.field_select) mv[3].y -= 2;
 238    }
 239 }
 240
 241 void
 242 vl_vb_add_block(struct vl_vertex_buffer *buffer, struct pipe_mpeg12_macroblock *mb,
 243                 const unsigned (*empty_block_mask)[3][2][2])
 244 {
 245    struct vl_vertex_stream *stream;
 246    unsigned i, j, k;
 247
 248    assert(buffer);
 249    assert(mb);
 250    assert(buffer->num_not_empty + buffer->num_empty < buffer->size);
 251
 252    if(mb->cbp)
 253       stream = buffer->start + buffer->num_not_empty++;
 254    else
 255       stream = buffer->end - ++buffer->num_empty;
 256
 257    stream->pos.x = mb->mbx;
 258    stream->pos.y = mb->mby;
 259
 260    for ( i = 0; i < 3; ++i)
 261       for ( j = 0; j < 2; ++j)
 262          for ( k = 0; k < 2; ++k)
 263             stream->eb[i][j][k] = !(mb->cbp & (*empty_block_mask)[i][j][k]);
 264
 265    stream->dct_type_field = mb->dct_type == PIPE_MPEG12_DCT_TYPE_FIELD;
 266    stream->mb_type_intra = !mb->dct_intra;
 267
 268    stream->mv_wheights[0] = mb->mv[0].wheight;
 269    stream->mv_wheights[1] = mb->mv[1].wheight;
 270    get_motion_vectors(mb, stream->mv);
 271 }
 272
 273 void
 274 vl_vb_unmap(struct vl_vertex_buffer *buffer, struct pipe_context *pipe)
 275 {
 276    assert(buffer && pipe);
 277
 278    pipe_buffer_unmap(pipe, buffer->transfer);
 279 }
 280
 281 void
 282 vl_vb_restart(struct vl_vertex_buffer *buffer,
 283               unsigned *not_empty_start_instance, unsigned *not_empty_num_instances,
 284               unsigned *empty_start_instance, unsigned *empty_num_instances)
 285 {
 286    assert(buffer);
 287
 288    *not_empty_start_instance = 0;
 289    *not_empty_num_instances = buffer->num_not_empty;
 290    *empty_start_instance = buffer->size - buffer->num_empty;
 291    *empty_num_instances = buffer->num_empty;
 292
 293    buffer->num_not_empty = 0;
 294    buffer->num_empty = 0;
 295 }
 296
 297 void
 298 vl_vb_cleanup(struct vl_vertex_buffer *buffer)
 299 {
 300    assert(buffer);
 301
 302    pipe_resource_reference(&buffer->resource, NULL);
 303 }