src/gallium/drivers/radeon/radeon_video.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2013 Advanced Micro Devices, Inc.
   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 THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "radeon_video.h"
  29
  30 #include "radeon_vce.h"
  31 #include "radeonsi/si_pipe.h"
  32 #include "util/u_memory.h"
  33 #include "util/u_video.h"
  34 #include "vl/vl_defines.h"
  35 #include "vl/vl_video_buffer.h"
  36
  37 #include <unistd.h>
  38
  39 /* generate an stream handle */
  40 unsigned si_vid_alloc_stream_handle()
  41 {
  42    static unsigned counter = 0;
  43    unsigned stream_handle = 0;
  44    unsigned pid = getpid();
  45    int i;
  46
  47    for (i = 0; i < 32; ++i)
  48       stream_handle |= ((pid >> i) & 1) << (31 - i);
  49
  50    stream_handle ^= ++counter;
  51    return stream_handle;
  52 }
  53
  54 /* create a buffer in the winsys */
  55 bool si_vid_create_buffer(struct pipe_screen *screen, struct rvid_buffer *buffer, unsigned size,
  56                           unsigned usage)
  57 {
  58    memset(buffer, 0, sizeof(*buffer));
  59    buffer->usage = usage;
  60
  61    /* Hardware buffer placement restrictions require the kernel to be
  62     * able to move buffers around individually, so request a
  63     * non-sub-allocated buffer.
  64     */
  65    buffer->res = si_resource(pipe_buffer_create(screen, PIPE_BIND_SHARED, usage, size));
  66
  67    return buffer->res != NULL;
  68 }
  69
  70 /* destroy a buffer */
  71 void si_vid_destroy_buffer(struct rvid_buffer *buffer)
  72 {
  73    si_resource_reference(&buffer->res, NULL);
  74 }
  75
  76 /* reallocate a buffer, preserving its content */
  77 bool si_vid_resize_buffer(struct pipe_screen *screen, struct radeon_cmdbuf *cs,
  78                           struct rvid_buffer *new_buf, unsigned new_size)
  79 {
  80    struct si_screen *sscreen = (struct si_screen *)screen;
  81    struct radeon_winsys *ws = sscreen->ws;
  82    unsigned bytes = MIN2(new_buf->res->buf->size, new_size);
  83    struct rvid_buffer old_buf = *new_buf;
  84    void *src = NULL, *dst = NULL;
  85
  86    if (!si_vid_create_buffer(screen, new_buf, new_size, new_buf->usage))
  87       goto error;
  88
  89    src = ws->buffer_map(old_buf.res->buf, cs, PIPE_TRANSFER_READ | RADEON_TRANSFER_TEMPORARY);
  90    if (!src)
  91       goto error;
  92
  93    dst = ws->buffer_map(new_buf->res->buf, cs, PIPE_TRANSFER_WRITE | RADEON_TRANSFER_TEMPORARY);
  94    if (!dst)
  95       goto error;
  96
  97    memcpy(dst, src, bytes);
  98    if (new_size > bytes) {
  99       new_size -= bytes;
 100       dst += bytes;
 101       memset(dst, 0, new_size);
 102    }
 103    ws->buffer_unmap(new_buf->res->buf);
 104    ws->buffer_unmap(old_buf.res->buf);
 105    si_vid_destroy_buffer(&old_buf);
 106    return true;
 107
 108 error:
 109    if (src)
 110       ws->buffer_unmap(old_buf.res->buf);
 111    si_vid_destroy_buffer(new_buf);
 112    *new_buf = old_buf;
 113    return false;
 114 }
 115
 116 /* clear the buffer with zeros */
 117 void si_vid_clear_buffer(struct pipe_context *context, struct rvid_buffer *buffer)
 118 {
 119    struct si_context *sctx = (struct si_context *)context;
 120
 121    si_sdma_clear_buffer(sctx, &buffer->res->b.b, 0, buffer->res->b.b.width0, 0);
 122    context->flush(context, NULL, 0);
 123 }