Ejemplo n.º 1
0
/**
 * Called via glGetBufferSubDataARB().
 */
static void
intel_bufferobj_get_subdata(GLcontext * ctx,
                            GLenum target,
                            GLintptrARB offset,
                            GLsizeiptrARB size,
                            GLvoid * data, struct gl_buffer_object *obj)
{
   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);

   assert(intel_obj);
   if (intel_obj->sys_buffer)
      memcpy(data, (char *)intel_obj->sys_buffer + offset, size);
   else
      dri_bo_get_subdata(intel_obj->buffer, offset, size, data);
}
Ejemplo n.º 2
0
/* XXX: slice_data_bit_offset does not account for EPB */
unsigned int
avc_get_first_mb_bit_offset_with_epb(
    dri_bo                     *slice_data_bo,
    VASliceParameterBufferH264 *slice_param,
    unsigned int                mode_flag
)
{
    unsigned int in_slice_data_bit_offset = slice_param->slice_data_bit_offset;
    unsigned int out_slice_data_bit_offset;
    unsigned int i, j, n, buf_size, data_size, header_size;
    uint8_t *buf;
    int ret;

    header_size = slice_param->slice_data_bit_offset / 8;
    data_size   = slice_param->slice_data_size - slice_param->slice_data_offset;
    buf_size    = (header_size * 3 + 1) / 2; // Max possible header size (x1.5)

    if (buf_size > data_size)
        buf_size = data_size;

    buf = alloca(buf_size);
    ret = dri_bo_get_subdata(
        slice_data_bo, slice_param->slice_data_offset,
        buf_size, buf
    );
    assert(ret == 0);

    for (i = 2, j = 2, n = 0; i < buf_size && j < header_size; i++, j++) {
        if (buf[i] == 0x03 && buf[i - 1] == 0x00 && buf[i - 2] == 0x00)
            i += 2, j++, n++;
    }

    out_slice_data_bit_offset = in_slice_data_bit_offset + n * 8;

    if (mode_flag == ENTROPY_CABAC)
        out_slice_data_bit_offset = ALIGN(out_slice_data_bit_offset, 0x8);
    return out_slice_data_bit_offset;
}